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scale(1)}80%{opacity:1;transform:translate(-50%,-36px) scale(1)}to{opacity:0;transform:translate(-50%,-52px) scale(.9)}}.tab-bar{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:24px;overflow-x:auto}.tab{padding:10px 18px;border:none;background:none;color:var(--text-muted);font-family:inherit;font-size:.9rem;font-weight:500;cursor:pointer;border-bottom:2px solid transparent;white-space:nowrap;transition:all var(--transition)}.tab:hover{color:var(--text-secondary)}.tab.active{color:var(--accent);border-bottom-color:var(--accent)}@media(max-width:768px){.container{padding:0 16px}.page-header{padding:32px 0 20px}.page-header h1{font-size:1.5rem}.page-header p{font-size:.95rem}.sessions-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:repeat(2,1fr);gap:8px}.stat-card{padding:12px 8px}.stat-value{font-size:1.5rem}.nav-links{display:none}.nav-brand span{font-size:.9rem}#userInfo{display:none!important}.nav{padding:10px 0}.nav .container{padding:0 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#cardCounter{padding:0;margin-bottom:12px;flex-shrink:0}.difficulty-selector{flex-wrap:wrap}.section{margin-bottom:20px}.accordion-header{padding:14px 16px;font-size:.9rem}.accordion-body{padding:16px}.quiz-option{padding:12px 14px;font-size:.9rem}.discussion-input{font-size:.9rem;min-height:100px}.idea-actions{gap:6px}.idea-action-btn{padding:10px 12px;font-size:.78rem;min-height:40px}.course-card-title,.session-card-title{word-break:break-word}.tutor-fab{bottom:80px;right:16px;width:34px;height:34px;font-size:1rem}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:var(--bg-secondary);border-top:1px solid var(--border);padding:8px 4px;z-index:100;justify-content:space-around}.mobile-nav a{display:flex;flex-direction:column;align-items:center;gap:3px;font-size:.68rem;color:var(--text-secondary);padding:6px 8px;min-width:52px;min-height:52px;justify-content:center;border-radius:var(--radius-sm);transition:color var(--transition),background var(--transition)}.mobile-nav a:active{opacity:.75}.mobile-nav a.active{color:var(--accent);font-weight:600}.mobile-nav a span.icon{font-size:1.3rem}.page-wrapper{padding-bottom:72px}main{padding-bottom:80px}.progress-ring-wrap svg{width:100px;height:100px}.progress-ring-text{font-size:1.4rem}.progress-ring-label{visibility:hidden}.course-path-header{padding:18px 0 10px}.course-path-hero{grid-template-columns:1fr;gap:14px}.course-path-page .progress-ring-wrap{display:none}.course-path-titlebar h1{font-size:clamp(1.54rem,7.4vw,2.18rem);line-height:1.1}.course-path-purpose,.course-section-note{display:none}.course-path-titleblock .difficulty-badge{display:none!important}.course-next-card{grid-template-columns:1fr;gap:16px;margin-bottom:20px}.course-next-side{align-items:flex-start;flex-direction:column;justify-content:flex-start;width:100%}.course-next-side .btn{width:100%;min-height:56px}.course-tools-head{grid-template-columns:1fr;align-items:stretch}.course-path-page 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14px;min-height:44px;color:var(--text-muted);font-size:.88rem;font-weight:500;border-bottom:2px solid transparent;white-space:nowrap;transition:color var(--transition),border-color var(--transition);-webkit-tap-highlight-color:transparent}.page-subnav a:hover{color:var(--text-primary)}.page-subnav a.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}.page-subnav a .icon{font-size:1rem;line-height:1;width:17px;height:17px}@media(max-width:768px){.page-subnav{padding:0 12px;gap:2px}.page-subnav a{padding:11px 10px;font-size:.82rem}}.idea-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}.idea-action-cluster,.idea-action-utility{display:inline-flex;align-items:center;gap:7px;flex-wrap:wrap;min-width:0}.idea-action-cluster{flex:1 1 auto}.idea-action-utility{flex:0 1 auto;margin-left:auto;padding-left:10px;border-left:1px solid var(--border)}.idea-actions-label{font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-right:4px}.idea-action-btn{display:inline-flex;align-items:center;justify-content:center;gap:5px;padding:7px 14px;border:1.5px solid var(--border);border-radius:100px;background:var(--bg-primary);color:var(--text-secondary);font-size:.8rem;font-weight:600;font-family:inherit;cursor:pointer;transition:all var(--dur-base) var(--ease-out-expo)}.idea-action-btn .idea-action-icon,.idea-action-btn .idea-action-label{display:inline-flex;align-items:center}.idea-action-btn .idea-action-icon{justify-content:center;width:16px;height:16px}.idea-action-btn .idea-action-icon svg{width:16px;height:16px}.idea-action-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-subtle);transform:translateY(-1px);box-shadow:0 2px 8px #6366f126}.idea-action-btn:active{transform:translateY(0)}.idea-action-btn:disabled{opacity:.6;cursor:wait}.idea-action-primary{padding-inline:16px;border-color:color-mix(in srgb,var(--accent) 76%,var(--border));background:var(--accent);color:#fff;box-shadow:0 10px 24px color-mix(in srgb,var(--accent) 22%,transparent)}.idea-action-primary:hover{background:var(--accent-hover);color:#fff;box-shadow:0 12px 28px color-mix(in srgb,var(--accent) 28%,transparent)}.idea-action-utility .idea-action-btn{background:transparent;border-color:color-mix(in srgb,var(--border) 78%,transparent);color:var(--text-muted)}.idea-action-utility .idea-action-btn:hover{background:var(--bg-input);color:var(--text-primary);border-color:color-mix(in srgb,var(--border) 60%,var(--text-muted) 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42%,var(--border));box-shadow:none}.tts-audio-spinner,.followup-send-spinner{width:15px;height:15px;border-radius:50%;border:2px solid rgba(255,255,255,.34);border-top-color:#fff;animation:lectureAudioSpin .72s linear infinite}.idea-action-btn:not(.tts-active):not(.idea-action-primary) .tts-audio-spinner{border-color:color-mix(in srgb,var(--text-muted) 28%,transparent);border-top-color:var(--accent)}.tts-word{transition:background 80ms var(--ease-out),color 80ms var(--ease-out);border-radius:3px;padding:0 2px}.tts-word.active{background:var(--accent);color:#fff;border-radius:4px;box-shadow:0 0 8px #6366f166;transition:none}.tts-controls{display:flex;align-items:center;gap:10px}.tts-select{max-width:180px;font-size:.78rem;padding:5px 8px}.tts-speed{display:flex;align-items:center;gap:6px}.tts-range{width:70px;height:4px;-webkit-appearance:none;appearance:none;background:var(--border);border-radius:2px;outline:none}.tts-range::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:var(--accent);cursor:pointer}@media(max-width:768px){.tts-controls{width:100%}.tts-select{flex:1}}.idea-action-icon{font-size:.9rem}.lecture-config-overlay{position:fixed;inset:0;z-index:10000;background:#00000080;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity var(--dur-base) var(--ease-out-expo);padding:20px}.lecture-config-overlay.active{opacity:1;pointer-events:all}.lecture-config-modal{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg, 16px);max-width:560px;width:100%;max-height:85vh;overflow-y:auto;box-shadow:0 20px 60px #0000004d;opacity:0;transform:translateY(12px);transition:transform var(--dur-base) var(--ease-spring-soft),opacity var(--dur-fast) var(--ease-out-expo)}.lecture-config-overlay.active .lecture-config-modal{opacity:1;transform:translateY(0)}.lecture-config-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px 16px;border-bottom:1px solid var(--border)}.lecture-config-header h3{font-size:1.1rem;font-weight:700;margin:0}.lecture-config-close{width:32px;height:32px;border-radius:8px;border:none;background:transparent;color:var(--text-muted);font-size:1.3rem;cursor:pointer;display:flex;align-items:center;justify-content:center}.lecture-config-close:hover{background:var(--bg-secondary);color:var(--text-primary)}.lecture-config-section{padding:16px 24px}.lecture-config-label{display:block;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:12px}.lecture-style-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.lecture-style-card{display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:14px 16px;border:2px solid var(--border);border-radius:var(--radius-md, 10px);background:var(--bg-primary);cursor:pointer;transition:border-color var(--dur-base),background var(--dur-base),box-shadow var(--dur-base);text-align:left}.lecture-style-card:hover{border-color:var(--accent);background:var(--bg-secondary)}.lecture-style-card.active{border-color:var(--accent);background:#6366f114;box-shadow:0 0 0 1px var(--accent)}.lecture-style-icon{width:34px;height:34px;border-radius:12px;background:var(--accent-subtle);color:var(--accent);display:inline-flex;align-items:center;justify-content:center;margin-bottom:2px}.lecture-style-icon .icon{width:20px;height:20px}.lecture-style-name{font-size:.85rem;font-weight:600;color:var(--text-primary)}.lecture-style-desc{font-size:.72rem;color:var(--text-muted);line-height:1.4}.lecture-length-chips{display:flex;gap:8px;flex-wrap:wrap}.lecture-length-chip{padding:8px 20px;border:2px solid var(--border);border-radius:100px;background:var(--bg-primary);color:var(--text-secondary);font-size:.85rem;font-weight:500;cursor:pointer;transition:border-color var(--dur-base),background var(--dur-base),color var(--dur-base)}.lecture-length-chip:hover{border-color:var(--accent);color:var(--accent)}.lecture-length-chip.active{border-color:var(--accent);background:var(--accent);color:#fff}.lecture-custom-style-input{width:100%;padding:10px 12px;border:2px solid var(--border);border-radius:10px;background:var(--bg-primary);color:var(--text-primary);font-size:.88rem;font-family:inherit;line-height:1.4;resize:vertical;min-height:56px;box-sizing:border-box;transition:border-color var(--dur-base),background var(--dur-base)}.lecture-custom-style-input:focus{outline:none;border-color:var(--accent);background:var(--bg-secondary)}.lecture-custom-style-input::placeholder{color:var(--text-muted)}.lecture-config-actions{display:flex;gap:10px;padding:16px 24px 20px;border-top:1px solid var(--border)}.lecture-config-actions .btn{flex:1}@media(max-width:480px){.lecture-style-grid{grid-template-columns:1fr}.lecture-config-modal{max-height:90vh}.lecture-config-section{padding:12px 16px}.lecture-config-actions{padding:12px 16px 16px}}.lecture-player{position:fixed;inset:0;z-index:9999;--lecture-snip-bottom: 116px;background:var(--bg-primary);isolation:isolate;display:flex;flex-direction:column;opacity:0;pointer-events:none;transition:opacity var(--dur-slow) var(--ease-out-expo)}.lecture-player.active{opacity:1;pointer-events:all}.lecture-player:not(.active) *{pointer-events:none!important}.lecture-player-body:before{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;opacity:0;background:linear-gradient(150deg,transparent 0%,color-mix(in srgb,var(--accent) 10%,transparent) 34%,color-mix(in srgb,#8bd7ff 9%,transparent) 52%,transparent 74%);transform:translate3d(-8%,-6%,0) scale(1.04);transition:opacity var(--dur-slow) var(--ease-out-expo)}.lecture-player.is-preparing .lecture-player-body:before{opacity:1;animation:lectureAmbientWash 7.6s ease-in-out infinite}.lecture-player-header{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;padding:16px 22px 14px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg-primary) 94%,var(--bg-secondary) 6%);flex-shrink:0}.lecture-player-titleblock{min-width:0}.lecture-player-header h3{font-size:1rem;line-height:1.28;font-weight:750;margin:0;letter-spacing:0;overflow-wrap:anywhere}.lecture-player-header .sub{font-size:.78rem;line-height:1.55;color:var(--text-muted);margin-top:5px;max-width:56ch;overflow-wrap:anywhere}.lecture-player-actions{position:relative;display:flex;justify-content:flex-end;align-items:center;max-width:none}.lecture-action-btn,.lecture-close-btn,.lecture-overflow-btn{min-height:34px;border:1px solid color-mix(in srgb,var(--border) 82%,var(--text-muted) 18%);border-radius:999px;background:transparent;color:var(--text-secondary);display:inline-flex;align-items:center;justify-content:center;gap:7px;font:inherit;font-size:.8rem;font-weight:700;line-height:1;cursor:pointer;transition:background var(--dur-base) var(--ease-out-expo),border-color var(--dur-base) var(--ease-out-expo),color var(--dur-base) var(--ease-out-expo),transform var(--dur-fast) var(--ease-out-expo)}.lecture-action-btn{padding:0 12px}.lecture-close-btn,.lecture-overflow-btn{width:38px;height:38px;min-height:38px;padding:0}.lecture-collapse-btn{grid-column:1}.lecture-overflow-menu{position:relative}.lecture-overflow-btn{list-style:none}.lecture-overflow-btn::-webkit-details-marker{display:none}.lecture-overflow-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:20;display:grid;gap:4px;min-width:168px;padding:8px;border:1px solid color-mix(in srgb,var(--border) 82%,var(--text-muted) 18%);border-radius:12px;background:color-mix(in srgb,var(--bg-secondary) 96%,var(--bg-card) 4%);box-shadow:0 18px 44px #0f172a2e}.lecture-overflow-menu:not([open]) .lecture-overflow-panel{display:none}.lecture-overflow-panel .lecture-action-btn{justify-content:flex-start;width:100%;min-height:38px;border-color:transparent;border-radius:9px;background:transparent}.lecture-text-size-row{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:6px;margin-top:4px;padding:8px 4px 2px;border-top:1px solid color-mix(in srgb,var(--border) 78%,transparent)}.lecture-text-size-label{padding-left:8px;color:var(--text-muted);font-size:.74rem;font-weight:800;letter-spacing:0}.lecture-text-size-btn{width:34px;height:32px;border:1px solid color-mix(in srgb,var(--border) 82%,var(--text-muted) 18%);border-radius:999px;background:color-mix(in srgb,var(--bg-card) 70%,transparent);color:var(--text-secondary);font:inherit;font-size:.78rem;font-weight:900;line-height:1;letter-spacing:0;cursor:pointer}.lecture-text-size-btn:hover{border-color:color-mix(in srgb,var(--accent) 56%,var(--border));background:var(--accent-subtle);color:var(--text-primary)}.lecture-text-size-btn:disabled,.lecture-text-size-btn[aria-disabled=true]{cursor:not-allowed;opacity:.42}.lecture-action-btn .icon,.lecture-close-btn .icon,.lecture-overflow-btn .icon{width:15px;height:15px}.lecture-action-btn:hover,.lecture-close-btn:hover,.lecture-overflow-btn:hover{border-color:color-mix(in srgb,var(--accent) 52%,var(--border));background:var(--accent-subtle);color:var(--text-primary)}.lecture-ask-tutor-btn{padding-inline:13px;border-color:color-mix(in srgb,var(--accent) 42%,var(--border));background:color-mix(in srgb,var(--accent) 10%,var(--bg-card) 90%);color:color-mix(in srgb,var(--text-primary) 82%,var(--accent) 18%)}.lecture-ask-tutor-btn .icon{width:15px;height:15px}.lecture-action-btn:disabled,.lecture-action-btn[aria-disabled=true]{cursor:not-allowed;opacity:.48;transform:none;box-shadow:none}.lecture-action-btn:active,.lecture-close-btn:active,.lecture-overflow-btn:active{transform:scale(.97)}.lecture-player-body{position:relative;z-index:1;flex:1;overflow-y:auto;padding:30px 24px 40px;display:flex;justify-content:center;scrollbar-width:thin;scrollbar-color:color-mix(in srgb,var(--accent) 42%,var(--border)) transparent}.lecture-player-body::-webkit-scrollbar{width:8px}.lecture-player-body::-webkit-scrollbar-track{background:transparent}.lecture-player-body::-webkit-scrollbar-thumb{background:color-mix(in srgb,var(--accent) 36%,var(--border));border-radius:999px;border:2px solid transparent;background-clip:padding-box}.lecture-player-body-inner{position:relative;z-index:1;max-width:640px;width:100%;padding-bottom:92px}.lecture-player.is-complete .lecture-player-body-inner{padding-bottom:230px}.lecture-transcript{position:relative;font-size:1.06rem;line-height:1.88;color:var(--text-secondary);letter-spacing:0;text-align:left;word-spacing:normal;word-break:normal;overflow-wrap:break-word;hyphens:auto}.lecture-player.lecture-text-small .lecture-transcript{font-size:.96rem;line-height:1.82}.lecture-player.lecture-text-large .lecture-transcript{font-size:1.18rem;line-height:1.9}.lecture-player.lecture-text-xlarge .lecture-transcript{font-size:1.32rem;line-height:1.92}.lecture-transcript p{margin-bottom:22px;max-width:68ch}.lecture-transcript p:last-child{margin-bottom:0}.lecture-transcript .tts-word{display:inline;white-space:normal}.lecture-transcript.is-streaming{color:var(--text-primary);min-height:120px;isolation:isolate}.lecture-transcript.is-streaming:before{content:"";position:absolute;inset:-22px -18px auto;z-index:0;height:min(44vh,320px);border-radius:28px;pointer-events:none;opacity:.48;background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 13%,transparent),color-mix(in srgb,#7dd3fc 7%,transparent) 52%,transparent 100%);animation:lectureAmbientBreath 5.8s ease-in-out infinite}.lecture-transcript.is-streaming p:last-child{position:relative}.lecture-transcript.is-streaming p{position:relative;z-index:1}.lecture-transcript.is-streaming p:empty:before{content:"Setting the stage...";color:var(--text-muted)}.lecture-transcript.is-streaming p:last-child:after{content:"";display:inline-block;width:2px;height:.95em;margin-left:.18em;border-radius:999px;background:var(--accent);vertical-align:-.12em;animation:lectureStreamingCaret .92s ease-in-out infinite}.lecture-transcript p:has(.tts-word.active){color:var(--text-primary)}.lecture-transcript .tts-word.active{background:color-mix(in srgb,var(--accent) 88%,#ffffff 12%);color:#fff;box-shadow:0 0 0 1px color-mix(in srgb,var(--accent) 55%,transparent),0 0 18px color-mix(in srgb,var(--accent) 28%,transparent)}.lecture-transcript .tts-word.sentence-active{background:color-mix(in srgb,var(--accent) 14%,transparent);color:color-mix(in srgb,var(--text-primary) 92%,var(--accent) 8%)}.lecture-generating{position:relative;display:flex;align-items:center;justify-content:center;min-height:152px;padding:30px 0 18px;color:var(--text-muted)}.lecture-start-shell{position:relative;display:grid;justify-items:center;align-items:center;gap:12px;width:min(100%,360px);padding:22px 22px 20px;border:1px solid color-mix(in srgb,var(--accent) 26%,var(--border));border-radius:24px;background:linear-gradient(180deg,color-mix(in srgb,var(--bg-card) 78%,transparent),color-mix(in srgb,var(--bg-secondary) 88%,transparent));box-shadow:0 24px 70px color-mix(in srgb,var(--accent) 12%,transparent),inset 0 1px color-mix(in srgb,#fff 15%,transparent);overflow:hidden;text-align:center}.lecture-start-shell:before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(118deg,transparent 0%,transparent 28%,color-mix(in srgb,var(--accent) 18%,transparent) 50%,transparent 72%,transparent 100%);opacity:.62;transform:translate(-68%);animation:lectureOpeningSheen 4.8s ease-in-out infinite}.lecture-start-spinner{--sz: 25px;position:relative;z-index:1;flex:0 0 auto;filter:drop-shadow(0 0 18px color-mix(in srgb,var(--accent) 45%,transparent))}.lecture-start-copy{position:relative;z-index:1;display:grid;justify-items:center;gap:5px;max-width:28ch}.lecture-start-kicker{color:color-mix(in srgb,var(--accent) 86%,#fff 14%);font-size:.68rem;font-weight:850;line-height:1;letter-spacing:.08em;text-transform:uppercase}.lecture-start-text{color:var(--text-primary);font-size:1rem;line-height:1.24;font-weight:820;letter-spacing:0}.lecture-start-subtext{color:var(--text-muted);font-size:.84rem;line-height:1.48;font-weight:600}@keyframes lectureStreamingCaret{0%,to{opacity:.24}45%{opacity:1}}@keyframes lectureAmbientWash{0%,to{opacity:.64;transform:translate3d(-10%,-7%,0) scale(1.04)}50%{opacity:1;transform:translate3d(7%,5%,0) scale(1.08)}}@keyframes lectureAmbientBreath{0%,to{opacity:.32;transform:translateY(0)}50%{opacity:.58;transform:translateY(8px)}}@keyframes lectureOpeningSheen{0%,18%{transform:translate(-76%);opacity:0}38%,62%{opacity:.62}82%,to{transform:translate(76%);opacity:0}}.lecture-player-controls{position:relative;flex-shrink:0;border-top:1px solid var(--border);background:linear-gradient(180deg,color-mix(in srgb,var(--bg-secondary) 96%,var(--bg-card) 4%),var(--bg-secondary));padding:10px 24px 16px;box-shadow:0 -10px 30px #0f172a0f}body:has(.lecture-player.active) .lecture-player:after{content:"";position:fixed;inset:0;z-index:12;pointer-events:none;opacity:0;background:#0f172a24;-webkit-backdrop-filter:blur(0);backdrop-filter:blur(0);transition:opacity var(--dur-base) var(--ease-out-expo),backdrop-filter var(--dur-base) var(--ease-out-expo)}body:has(.lecture-player.active):has(#tutorChat:not(.hidden)) .lecture-player:after{opacity:1}body:has(.lecture-player.active):has(#tutorChat:not(.hidden):has(.tutor-voice-input:not(.hidden))) .lecture-player:after{opacity:1;background:#0f172a47;-webkit-backdrop-filter:blur(5px) saturate(.92);backdrop-filter:blur(5px) saturate(.92)}.lecture-progress-bar{width:100%;height:7px;background:color-mix(in srgb,var(--border) 72%,transparent);border-radius:999px;cursor:pointer;margin-bottom:14px;position:relative;overflow:hidden}.lecture-progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),color-mix(in srgb,var(--accent) 76%,#ffffff 24%));border-radius:inherit;width:0%;transition:width var(--dur-slow) var(--ease-spring-soft)}.lecture-follow-lock-btn{position:absolute;right:22px;bottom:calc(var(--lecture-snip-bottom) + 4px + env(safe-area-inset-bottom,0px));z-index:6;width:40px;height:40px;border:1px solid color-mix(in srgb,var(--border) 80%,var(--text-muted) 20%);border-radius:50%;background:color-mix(in srgb,var(--bg-card) 86%,transparent);color:var(--text-muted);display:inline-flex;align-items:center;justify-content:center;padding:0;cursor:pointer;opacity:.82;box-shadow:0 12px 28px #0f172a1a,inset 0 1px #ffffff2e;backdrop-filter:blur(16px) saturate(1.12);-webkit-backdrop-filter:blur(16px) saturate(1.12);transition:opacity var(--dur-base) var(--ease-out-expo),transform var(--dur-fast) var(--ease-out-expo),border-color var(--dur-base) var(--ease-out-expo),background var(--dur-base) var(--ease-out-expo),color var(--dur-base) var(--ease-out-expo),box-shadow var(--dur-base) var(--ease-out-expo)}.lecture-follow-lock-btn .icon{width:17px;height:17px}.lecture-follow-lock-btn:hover,.lecture-follow-lock-btn:focus-visible{opacity:1;border-color:color-mix(in srgb,var(--accent) 54%,var(--border));color:var(--text-primary);transform:translateY(-1px)}.lecture-follow-lock-btn:active{transform:translateY(0) scale(.97)}.lecture-follow-lock-btn.is-locked{opacity:1;border-color:color-mix(in srgb,var(--accent) 70%,var(--border));background:color-mix(in srgb,var(--accent) 18%,var(--bg-card) 82%);color:var(--accent);box-shadow:0 14px 34px color-mix(in srgb,var(--accent) 18%,transparent),inset 0 1px #fff3}.lecture-snip-row{position:absolute;left:50%;bottom:calc(var(--lecture-snip-bottom) + env(safe-area-inset-bottom,0px));z-index:6;display:flex;justify-content:center;margin:0;pointer-events:none;opacity:0;transform:translate(-50%) translateY(8px);transition:opacity var(--dur-base) var(--ease-out-expo),transform var(--dur-base) var(--ease-out-expo)}.lecture-player.has-transcript .lecture-snip-row{opacity:1;transform:translate(-50%) translateY(0)}.lecture-player.is-complete .lecture-snip-row,.lecture-player.has-error .lecture-snip-row{display:none}.lecture-player.has-error .lecture-follow-lock-btn,.lecture-player:not(.has-transcript) .lecture-follow-lock-btn{opacity:0;pointer-events:none}.lecture-error-state{max-width:340px;margin:clamp(72px,18vh,180px) auto 0;padding:0 12px;text-align:center}.lecture-error-title{margin:0;color:color-mix(in srgb,var(--danger) 78%,var(--text-primary) 22%);font-size:1rem;font-weight:780;line-height:1.45}.lecture-error-detail{margin:14px 0 0;color:var(--text-muted);font-size:.9rem;line-height:1.55}.lecture-error-state .btn{margin-top:18px;min-width:86px}.lecture-completion-handoff{position:absolute;left:50%;bottom:calc(106px + env(safe-area-inset-bottom,0px));z-index:7;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:16px;width:min(560px,calc(100% - 48px));padding:16px;border:1px solid color-mix(in srgb,var(--accent) 28%,var(--border) 72%);border-radius:10px;background:color-mix(in srgb,var(--bg-card) 94%,transparent);color:var(--text-primary);box-shadow:0 18px 46px #0f172a24,0 0 0 1px #ffffff6b inset;backdrop-filter:blur(18px) saturate(1.12);-webkit-backdrop-filter:blur(18px) saturate(1.12);transform:translate(-50%) translateY(0);transition:opacity var(--dur-base) var(--ease-out-expo),transform var(--dur-base) var(--ease-out-expo)}.lecture-completion-handoff[hidden]{display:none}.lecture-completion-copy{min-width:0}.lecture-completion-kicker{margin:0 0 3px;color:color-mix(in srgb,var(--accent) 72%,var(--text-primary) 28%);font-size:.76rem;font-weight:850;letter-spacing:0}.lecture-completion-handoff h4{margin:0;color:var(--text-primary);font-size:1.05rem;line-height:1.25;letter-spacing:0}.lecture-completion-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.lecture-completion-actions .btn{min-height:40px;border-radius:10px;white-space:nowrap}.lecture-controls-row{display:grid;grid-template-columns:minmax(84px,1fr) auto minmax(84px,1fr);grid-template-areas:"time time time" "voice transport speed";align-items:center;column-gap:12px;row-gap:10px}.lecture-voice-control,.lecture-speed-control{min-width:0;display:flex;align-items:center}.lecture-voice-control{position:relative;grid-area:voice;justify-self:start;justify-content:flex-start}.lecture-voice-control:after{content:"";position:absolute;right:13px;top:50%;width:7px;height:7px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;color:var(--text-secondary);pointer-events:none;transform:translateY(-65%) rotate(45deg)}.lecture-speed-control{grid-area:speed;justify-self:end;justify-content:flex-end}.lecture-transport-controls{grid-area:transport;width:max-content;display:flex;align-items:center;justify-content:center;gap:14px}.lecture-controls-row .lecture-voice-select{width:min(104px,100%);min-width:78px;max-width:104px;min-height:34px;margin-left:0!important;padding:0 28px;border-radius:999px;background:color-mix(in srgb,var(--bg-card) 64%,transparent);border-color:color-mix(in srgb,var(--border) 90%,var(--text-muted) 10%);color:var(--text-secondary);font-size:.78rem;font-weight:750;line-height:1;box-shadow:none;-webkit-appearance:none;appearance:none;text-align:center;text-align-last:center}.lecture-skip-btn,.lecture-speed-btn{min-width:50px;min-height:50px;border:1px solid color-mix(in srgb,var(--border) 82%,var(--text-muted) 18%);border-radius:50%;background:color-mix(in srgb,var(--bg-card) 78%,transparent);color:var(--text-secondary);display:inline-flex;align-items:center;justify-content:center;font:inherit;font-weight:850;cursor:pointer;transition:background var(--dur-base) var(--ease-out-expo),border-color var(--dur-base) var(--ease-out-expo),color var(--dur-base) var(--ease-out-expo),transform var(--dur-fast) var(--ease-out-expo),box-shadow var(--dur-base) var(--ease-out-expo)}.lecture-skip-btn{position:relative;width:50px;height:50px}.lecture-skip-btn .icon{width:26px;height:26px;display:block;opacity:.86}.lecture-skip-count{display:inline-flex;align-items:center;justify-content:center;font-size:.62rem;line-height:1;letter-spacing:0;color:var(--text-primary);font-weight:900}.lecture-speed-btn{border-radius:999px;min-width:48px;min-height:34px;padding:0 10px;background:color-mix(in srgb,var(--bg-card) 58%,transparent);color:var(--text-secondary);font-size:.78rem;box-shadow:none}.lecture-skip-btn:hover,.lecture-speed-btn:hover,.lecture-speed-btn[aria-expanded=true]{border-color:color-mix(in srgb,var(--accent) 56%,var(--border));background:var(--accent-subtle);color:var(--text-primary);box-shadow:0 8px 18px color-mix(in srgb,var(--accent) 9%,transparent)}.lecture-skip-btn:active,.lecture-speed-btn:active{transform:scale(.96)}.lecture-play-btn{position:relative;width:64px;height:64px;border-radius:50%;border:none;background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 84%,#ffffff 16%),var(--accent));color:#fff;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background var(--dur-base),transform var(--dur-fast),box-shadow var(--dur-base);flex-shrink:0;box-shadow:0 12px 28px color-mix(in srgb,var(--accent) 26%,transparent)}.lecture-play-btn.is-loading,.lecture-mini-play.is-loading,.tts-mini-play.is-loading{cursor:wait}.lecture-play-btn:disabled{cursor:wait;opacity:.68;filter:saturate(.82);box-shadow:none}.lecture-play-btn.is-loading:after{content:"";position:absolute;inset:-6px;border:1px solid color-mix(in srgb,var(--accent) 54%,transparent);border-radius:50%;opacity:.64;animation:lectureVoicePrepRing 1.35s ease-out infinite;pointer-events:none}.lecture-play-btn:active{transform:scale(.96)}.lecture-play-btn .icon{width:21px;height:21px;display:block}.lecture-mini-btn .icon,.lecture-mini-play .icon,.tts-mini-play .icon{width:18px;height:18px;display:block}.lecture-audio-spinner{width:18px;height:18px;border-radius:50%;border:2px solid rgba(255,255,255,.32);border-top-color:#fff;animation:lectureAudioSpin .72s linear infinite}@keyframes lectureAudioSpin{to{transform:rotate(360deg)}}@keyframes lectureVoicePrepRing{0%{transform:scale(.84);opacity:.7}to{transform:scale(1.22);opacity:0}}.lecture-time{grid-area:time;text-align:center;font-size:.82rem;color:var(--text-muted);font-variant-numeric:tabular-nums;min-width:0}.lecture-speed-sheet{position:absolute;right:24px;bottom:calc(100% + 12px);width:min(360px,calc(100vw - 32px));padding:14px;border:1px solid color-mix(in srgb,var(--border) 82%,var(--text-muted) 18%);border-radius:14px;background:var(--bg-primary);color:var(--text-primary);box-shadow:0 22px 60px #0f172a38,inset 0 1px #ffffff38;backdrop-filter:blur(20px) saturate(1.14);-webkit-backdrop-filter:blur(20px) saturate(1.14);z-index:8}.lecture-speed-sheet[hidden]{display:none}.lecture-speed-sheet-handle{width:48px;height:4px;margin:0 auto 12px;border-radius:999px;background:color-mix(in srgb,var(--text-muted) 28%,transparent)}.lecture-speed-sheet-title{text-align:center;font-size:.95rem;font-weight:850;margin-bottom:4px}.lecture-speed-sheet-value{text-align:center;font-size:2rem;line-height:1.1;font-weight:850;margin-bottom:14px}.lecture-speed-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.lecture-speed-options button{min-height:42px;border:1px solid color-mix(in srgb,var(--border) 78%,var(--text-muted) 22%);border-radius:999px;background:color-mix(in srgb,var(--bg-card) 82%,transparent);color:var(--text-secondary);font:inherit;font-weight:800;cursor:pointer}.lecture-speed-options button.active{border-color:color-mix(in srgb,var(--accent) 78%,var(--border));background:color-mix(in srgb,var(--accent) 16%,var(--bg-card) 84%);color:var(--text-primary)}.lecture-player:has(.lecture-speed-sheet:not([hidden])) .lecture-snip-row{opacity:0;pointer-events:none}.lecture-snip-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:999px;border-color:#10b98170!important;background:linear-gradient(145deg,#10b98133,#10b9811a)!important;color:color-mix(in srgb,var(--text-primary) 86%,#10b981 14%)!important;opacity:.88;backdrop-filter:blur(18px) saturate(1.16);-webkit-backdrop-filter:blur(18px) saturate(1.16);box-shadow:0 14px 34px #10b9812e,inset 0 1px #ffffff38;font-size:.9rem;font-weight:800;white-space:nowrap;flex-shrink:0;pointer-events:auto;transform:translateY(0);transition:opacity var(--dur-base) var(--ease-out-expo),transform var(--dur-fast) var(--ease-out-expo),box-shadow var(--dur-base) var(--ease-out-expo),border-color var(--dur-base) var(--ease-out-expo),background var(--dur-base) var(--ease-out-expo)}.lecture-snip-btn:hover,.lecture-snip-btn:focus-visible{border-color:#10b981b8!important;opacity:1;box-shadow:0 18px 42px #10b9813d,inset 0 1px #ffffff47;transform:translateY(-1px)}.lecture-snip-btn:active{transform:translateY(0) scale(.98)}.lecture-snip-btn .icon{width:17px;height:17px;color:#10b981}.lecture-snip-btn.saved-pulse{box-shadow:0 14px 34px #34d39947,inset 0 1px #ffffff38}.lecture-snip-btn.snip-pending{opacity:1;border-color:#10b981bd!important;background:linear-gradient(145deg,#10b98142,#10b98124)!important}.lecture-snip-btn.snip-error{border-color:color-mix(in srgb,var(--danger) 62%,var(--border))!important;background:color-mix(in srgb,var(--danger) 10%,var(--bg-card) 90%)!important;color:color-mix(in srgb,var(--text-primary) 82%,var(--danger) 18%)!important}@media(max-width:640px){.lecture-player{--lecture-snip-bottom: 188px}.lecture-player-header{grid-template-columns:40px minmax(0,1fr) auto;align-items:center;gap:12px;padding:12px 20px;padding-top:calc(12px + env(safe-area-inset-top,0px))}.lecture-player-titleblock{grid-column:2}.lecture-player-actions{grid-column:3;justify-content:flex-end;width:88px;gap:6px}.lecture-ask-tutor-btn{width:40px;min-width:40px;height:40px;min-height:40px;padding:0}.lecture-ask-tutor-label{display:none}.lecture-close-btn{position:static;width:40px;height:40px;min-height:40px}.lecture-action-btn{flex:0 0 auto;min-height:32px;padding-inline:10px;font-size:.78rem}.lecture-player-header h3{font-size:1rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lecture-player-header .sub{display:-webkit-box;max-width:100%;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:1;line-height:1.36;margin-top:4px}.lecture-player-body{padding:22px 16px 36px}.lecture-player-body-inner{padding-bottom:248px}.lecture-player.is-complete .lecture-player-body-inner{padding-bottom:330px}.lecture-transcript{font-size:1.02rem;line-height:1.82}.lecture-transcript.is-streaming{min-height:96px}.lecture-follow-lock-btn{right:16px;bottom:calc(var(--lecture-snip-bottom) + 2px + env(safe-area-inset-bottom,0px));width:38px;height:38px}.lecture-generating{min-height:96px;padding:18px 0 8px}.lecture-start-shell{width:100%;max-width:342px;padding:18px 18px 17px;border-radius:20px}.lecture-start-subtext{font-size:.8rem;line-height:1.45}.lecture-completion-handoff{bottom:calc(168px + env(safe-area-inset-bottom,0px));grid-template-columns:1fr;align-items:stretch;gap:10px;width:calc(100% - 32px);padding:13px 14px 12px;border-radius:16px;background:linear-gradient(180deg,color-mix(in srgb,var(--bg-card) 96%,transparent),color-mix(in srgb,var(--bg-secondary) 90%,transparent))}.lecture-completion-kicker{font-size:.72rem}.lecture-completion-handoff h4{font-size:.98rem;line-height:1.24}.lecture-completion-actions{display:grid;grid-template-columns:1fr;gap:6px}.lecture-completion-actions .btn{width:100%;min-height:42px;white-space:normal}.lecture-completion-actions .lecture-completion-secondary{min-height:36px;border-color:color-mix(in srgb,var(--border) 58%,transparent);background:color-mix(in srgb,var(--bg-card) 68%,transparent);box-shadow:none}.lecture-snip-btn{min-height:38px;padding:0 15px;font-size:.82rem;opacity:.76}.lecture-player-controls{padding:10px 16px calc(16px + env(safe-area-inset-bottom,0px))}.lecture-controls-row{grid-template-columns:minmax(88px,1fr) minmax(162px,auto) minmax(88px,1fr);grid-template-areas:"time time time" "voice transport speed";grid-template-rows:auto auto;gap:8px 8px;justify-content:stretch}.lecture-transport-controls{width:100%;min-width:162px;gap:7px;justify-content:center}.lecture-skip-btn{width:44px;min-width:44px;height:44px;min-height:44px}.lecture-play-btn{width:60px;height:60px}.lecture-time{text-align:center}.lecture-controls-row .lecture-voice-select{width:min(104px,100%);max-width:104px;min-width:78px;min-height:36px;padding:0 28px;font-size:.78rem}.lecture-speed-btn{min-width:52px;min-height:36px;padding:0 10px}.lecture-speed-sheet{right:16px;bottom:calc(100% + 10px);width:calc(100vw - 32px)}}@media(prefers-reduced-motion:reduce){.lecture-player.is-preparing .lecture-player-body:before,.lecture-transcript.is-streaming:before,.lecture-start-shell:before,.lecture-transcript.is-streaming p:last-child:after,.lecture-play-btn.is-loading:after{animation:none}.lecture-player.is-preparing 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28%)}}.tutor-fab{position:fixed;bottom:24px;right:24px;width:40px;height:40px;border-radius:50%;background:color-mix(in srgb,var(--bg-card) 76%,var(--accent) 18%);color:color-mix(in srgb,var(--text-primary) 72%,var(--accent) 28%);border:1px solid color-mix(in srgb,var(--accent) 42%,var(--border));cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px -20px color-mix(in srgb,var(--accent) 70%,transparent),inset 0 1px color-mix(in srgb,#fff 8%,transparent);z-index:1000;opacity:.62;transition:opacity var(--dur-base),border-color var(--dur-base),background var(--dur-base)}.tutor-fab:hover{opacity:1;border-color:color-mix(in srgb,var(--accent) 58%,var(--border));background:color-mix(in srgb,var(--bg-card) 66%,var(--accent) 26%)}.tutor-chat{--tutor-panel: color-mix(in srgb, var(--bg-card) 54%, transparent);--tutor-panel-soft: color-mix(in srgb, var(--bg-card) 34%, transparent);--tutor-panel-strong: color-mix(in srgb, var(--bg-secondary) 68%, 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var(--ease-out-expo)}.fusion-jarvis-chat{animation:none}@media(max-width:768px){.tutor-chat{bottom:0;right:0;left:0;width:100%;max-width:100%;height:calc(100vh - 60px);max-height:calc(100vh - 60px);border-radius:16px 16px 0 0}}.tutor-chat-header{position:relative;z-index:3;display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--tutor-border);background:var(--bg-card);background:linear-gradient(180deg,var(--tutor-panel),var(--tutor-panel-soft)),radial-gradient(circle at 68% 12%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 32%),linear-gradient(115deg,var(--tutor-accent-wash),transparent 58%);box-shadow:0 16px 32px -28px #0000008c,inset 0 1px color-mix(in srgb,#fff 8%,transparent);-webkit-backdrop-filter:blur(18px) saturate(1.14);backdrop-filter:blur(18px) 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auto}.session-practice-feedback-loading strong,.session-practice-feedback-empty strong{display:block;color:var(--text-primary);font-size:1rem;margin-bottom:4px}.session-practice-feedback-loading p,.session-practice-feedback-empty p{margin:0;color:var(--text-secondary)}.session-feedback-loading-steps{display:flex;flex-direction:column;gap:5px;margin-top:12px;color:var(--text-muted);font-size:.78rem;font-weight:760}.session-feedback-loading-steps span{position:relative;padding-left:14px}.session-feedback-loading-steps span:before{content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;border-radius:999px;background:color-mix(in srgb,var(--accent) 76%,transparent)}.session-feedback-loading-steps span:nth-child(2){opacity:.72}.session-feedback-loading-steps span:nth-child(3){opacity:.48}.session-practice-feedback-sheet-actions{grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr)}.session-audio-sheet{max-width:420px}.concept-audio-play-btn{width:100%;background:var(--accent);color:#fff}.concept-audio-speed{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.concept-audio-speed button{min-height:44px;border:1px solid color-mix(in srgb,var(--border) 70%,transparent);border-radius:14px;background:color-mix(in srgb,var(--bg-secondary) 70%,transparent);color:var(--text-secondary);font:inherit;font-weight:850;cursor:pointer}.concept-audio-speed button.is-active{border-color:color-mix(in srgb,var(--accent) 80%,transparent);background:var(--accent-subtle);color:var(--accent)}.concept-audio-foot{display:flex;align-items:center;justify-content:flex-start;gap:12px;color:var(--text-muted);font-weight:800}body:has(.session-lesson-mode) .tts-mini-bar{display:none!important}body.session-sheet-open .session-audio-pill{display:none!important}body.session-completion-open .nav,body.session-completion-open .mobile-nav,body.session-completion-open #tutorFab,body.session-completion-open .session-audio-pill{opacity:0;pointer-events:none}.session-audio-pill{position:fixed;right:12px;bottom:calc(92px + env(safe-area-inset-bottom,0px));left:auto;z-index:1900;display:grid;grid-template-columns:38px minmax(0,1fr) 34px;align-items:center;gap:8px;width:min(244px,calc(100vw - 24px));min-height:52px;padding:6px;border:1px solid color-mix(in srgb,var(--border) 62%,var(--accent) 26%);border-radius:999px;background:linear-gradient(145deg,color-mix(in srgb,var(--bg-card) 92%,var(--accent) 8%),color-mix(in srgb,var(--bg-secondary) 92%,transparent));box-shadow:0 16px 42px -30px color-mix(in srgb,var(--accent) 76%,transparent);backdrop-filter:blur(16px)}.session-audio-pill[hidden]{display:none!important}.session-audio-pill-play,.session-audio-pill-close{display:inline-flex;align-items:center;justify-content:center;border:1px solid color-mix(in srgb,var(--border) 68%,transparent);border-radius:999px;background:color-mix(in srgb,var(--bg-secondary) 78%,transparent);color:var(--text-secondary);cursor:pointer}.session-audio-pill-play{width:38px;height:38px;color:#fff;background:var(--accent);border-color:color-mix(in srgb,var(--accent) 82%,transparent)}.session-audio-pill-close{width:34px;height:34px}.session-audio-pill-copy{min-width:0;display:grid;gap:2px}.session-audio-pill-copy strong,.session-audio-pill-copy span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.session-audio-pill-copy strong{color:var(--text-primary);font-size:.82rem}.session-audio-pill-copy span{color:var(--text-muted);font-size:.72rem;font-weight:800}body.session-audio-pill-active:has(.session-focus-page) .tutor-fab{bottom:calc(152px + env(safe-area-inset-bottom,0px))}.session-lesson-mode .session-practice-nav-btn svg{width:19px;height:19px}.session-practice-section[hidden]{display:none!important}body:has(.session-lesson-mode):not(.session-practice-complete) .session-reflection-section,body:has(.session-lesson-mode):not(.session-practice-complete) .session-notes-section,body:has(.session-lesson-mode):not(.session-practice-complete) .session-nav-row{display:none}.session-practice-complete-card{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:14px;align-items:center;margin-top:18px;padding:16px;border:1px solid color-mix(in srgb,var(--border) 70%,var(--accent) 18%);border-radius:18px;background:linear-gradient(145deg,color-mix(in srgb,var(--bg-card) 94%,var(--accent) 6%),color-mix(in srgb,var(--bg-secondary) 94%,transparent))}.session-practice-complete-card[hidden]{display:none!important}.session-practice-complete-card h3{margin:4px 0 6px;font-size:clamp(1.05rem,3.6vw,1.25rem);line-height:1.2}.session-practice-complete-card p{margin:0;color:var(--text-secondary);line-height:1.5}.session-practice-complete-card .btn{min-width:168px}.session-lesson-mode #nextBtn.disabled,.session-lesson-mode #nextBtn[aria-disabled=true]{opacity:.48;filter:grayscale(.28);pointer-events:auto;cursor:not-allowed}.session-lesson-mode .session-nav-row{display:grid;grid-template-columns:minmax(0,.72fr) minmax(0,1.28fr);gap:10px;margin:20px 0 10px;padding-bottom:calc(56px + env(safe-area-inset-bottom,0px))}.session-lesson-mode .session-nav-row .btn{min-height:56px;border-radius:17px;font-weight:900;letter-spacing:0;box-shadow:none}.session-lesson-mode .session-nav-row .btn .icon{width:18px;height:18px}.session-lesson-mode #prevBtn{color:color-mix(in srgb,var(--text-secondary) 82%,transparent);border-color:color-mix(in srgb,var(--border) 70%,transparent);background:color-mix(in srgb,var(--bg-card) 70%,transparent)}.session-lesson-mode #nextBtn{color:#fff;border-color:color-mix(in srgb,var(--accent) 84%,transparent);background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 96%,#fff 4%),color-mix(in srgb,var(--accent) 74%,var(--info) 26%));box-shadow:0 18px 44px -32px color-mix(in srgb,var(--accent) 88%,transparent),inset 0 1px color-mix(in srgb,#fff 16%,transparent)}.session-lesson-mode #nextBtn:hover,.session-lesson-mode #nextBtn:focus-visible{transform:translateY(-1px);filter:brightness(1.04)}.session-lesson-mode .session-coach-section{margin-top:12px}.session-lesson-mode .session-coach-card{border-radius:14px;background:linear-gradient(135deg,color-mix(in srgb,var(--bg-card) 92%,var(--accent) 6%),color-mix(in srgb,var(--bg-secondary) 94%,var(--success) 4%))}.session-lesson-mode .session-coach-action{min-width:140px;border-radius:12px}.session-immersive-chrome-hidden{opacity:0!important;pointer-events:none!important}@media(max-width:768px){.session-lesson-mode .session-discussion-carousel .session-discussion-card.card{height:auto;min-height:min(500px,calc(100svh - 240px));max-height:none;overflow:visible;padding:20px 16px 18px}.session-lesson-mode .session-discussion-prompt{grid-template-columns:32px minmax(0,1fr);gap:10px}.session-lesson-mode .session-discussion-question{font-size:clamp(1.08rem,4.6vw,1.28rem)}.session-lesson-mode .session-discussion-writing{margin-top:16px}.session-lesson-mode .session-discussion-actions{padding-top:14px}.session-lesson-mode .session-reflection-card.card{grid-template-rows:auto auto auto auto;min-height:0;padding:20px 16px 18px;border-radius:18px}.session-lesson-mode .session-reflection-prompt{grid-template-columns:32px minmax(0,1fr);gap:10px;max-height:min(28svh,220px);overflow-x:hidden;overflow-y:auto;-webkit-overflow-scrolling:touch}.session-lesson-mode .session-reflection-copy p{font-size:clamp(1.12rem,4.8vw,1.36rem);line-height:1.3}.session-lesson-mode .textarea.session-reflection-textarea{height:min(260px,31svh);min-height:190px;padding:18px;border-radius:18px;font-size:1.06rem;line-height:1.58}.session-lesson-mode .session-reflection-actions{grid-template-columns:minmax(0,1fr);align-items:stretch}.session-lesson-mode .session-reflection-status{justify-content:space-between}.session-lesson-mode .session-reflection-actions .session-feedback-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));justify-content:stretch;width:100%}.session-lesson-mode .session-reflection-actions .session-feedback-actions:has(#reflectionFeedbackBtn:not([hidden])){grid-template-columns:1fr}.session-lesson-mode .session-reflection-actions .session-feedback-btn,.session-lesson-mode .session-reflection-actions .session-feedback-view-btn,.session-lesson-mode .session-reflection-actions .session-feedback-next-btn{width:100%;min-height:48px;border-radius:14px}.session-lesson-mode .session-reflection-path{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.session-lesson-mode .session-reflection-path-step{grid-template-columns:minmax(0,1fr);align-items:start;padding:8px 6px;text-align:center}.session-lesson-mode .session-reflection-path-step span{font-size:.66rem}.session-lesson-mode .session-reflection-path-step strong{font-size:.82rem}body.session-immersive-active{overflow:hidden}body.session-immersive-active .nav,body.session-immersive-active .mobile-nav,body.session-immersive-active #tutorFab,body.session-immersive-active .session-audio-pill{opacity:0;pointer-events:none}body.session-immersive-active .session-lesson-mode .session-ideas-section{position:fixed;inset:0;z-index:2400;display:flex;flex-direction:column;width:100%;height:100svh;min-height:100svh;margin:0;padding:calc(12px + env(safe-area-inset-top,0px)) 12px calc(12px + env(safe-area-inset-bottom,0px));border:0;border-radius:0;background:var(--bg-primary);overflow:hidden}body.session-immersive-active .session-player-head{flex:0 0 auto;margin-bottom:8px}body.session-immersive-active .session-idea-stage{flex:1 1 auto;min-height:0;display:grid;grid-template-rows:auto minmax(0,1fr) auto auto auto;gap:7px;overflow:hidden}body.session-immersive-active .session-idea-carousel-toolbar,body.session-immersive-active .session-idea-carousel-actions{flex:0 0 auto}body.session-immersive-active .session-idea-carousel-toolbar{margin:0 0 2px}body.session-immersive-active .session-idea-carousel-actions{position:static;bottom:auto;margin:0 auto}body.session-immersive-active .session-idea-completion-choice{position:static;z-index:1;display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:28px;margin:-1px auto 0;padding:0;border:0;background:transparent;box-shadow:none;opacity:.64;backdrop-filter:none}body.session-immersive-active .session-idea-completion-choice span,body.session-immersive-active .session-idea-completion-choice p{display:none}body.session-immersive-active .session-idea-completion-choice strong{color:var(--text-muted);font-size:.74rem;font-weight:760;line-height:1.2;white-space:nowrap}body.session-immersive-active .session-ideas-section .session-idea-carousel{--session-idea-card-gutter: clamp(8px, 2.4vw, 12px);flex:1 1 auto;min-height:0;align-items:stretch;gap:var(--session-idea-card-gutter);padding:0 calc(var(--session-idea-card-gutter) * 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minmax(0,1fr);gap:12px;max-height:min(26svh,196px);overflow-x:hidden;overflow-y:auto;-webkit-overflow-scrolling:touch}body.session-practice-immersive-active .session-discussion-index{min-height:28px;padding-top:3px;font-size:.9rem}body.session-practice-immersive-active .session-discussion-question{font-size:clamp(1.04rem,4.2vw,1.28rem);line-height:1.32}body.session-practice-immersive-active .session-discussion-helper{margin-top:8px;font-size:.8rem;line-height:1.34}body.session-practice-immersive-active .session-discussion-writing{display:flex;min-height:0;margin-top:2px}body.session-practice-immersive-active .textarea.session-discussion-textarea{height:100%!important;min-height:0;max-height:none;margin-top:0;padding:18px;overflow-y:auto;border-radius:18px;font-size:1.06rem;line-height:1.58}body.session-practice-immersive-active .session-answer-voice-row{flex:0 0 auto;align-items:center;flex-direction:row;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:0;min-height:44px}body.session-practice-immersive-active .session-answer-voice-btn{width:auto;min-width:min(100%,190px);min-height:44px}body.session-practice-immersive-active .session-answer-voice-status{width:100%;text-align:center}body.session-practice-immersive-active .session-discussion-actions{flex:0 0 auto;grid-template-columns:minmax(0,1fr) auto;gap:8px 10px;margin-top:0;padding-top:6px}body.session-practice-immersive-active .session-feedback-actions{grid-column:1 / -1;justify-content:stretch;width:100%}body.session-practice-immersive-active .session-feedback-btn.btn,body.session-practice-immersive-active .session-feedback-view-btn,body.session-practice-immersive-active .session-feedback-next-btn{width:100%;min-height:48px;border-radius:14px}body.session-practice-immersive-active .session-practice-carousel-actions{flex:0 0 auto;position:static;bottom:auto;grid-template-columns:38px minmax(0,112px) 38px;width:min(100%,276px);margin:8px auto 0;padding:6px;border-radius:16px}body.session-practice-immersive-active .session-practice-list{position:fixed;left:18px;right:18px;bottom:calc(80px + env(safe-area-inset-bottom,0px));z-index:2440;width:auto;max-height:36svh;overflow-y:auto;margin:0;border-radius:16px;box-shadow:0 20px 56px -40px color-mix(in srgb,#000 62%,transparent)}.session-lesson-mode .session-practice-section #discussions.session-discussion-carousel{--session-practice-card-gutter: 8px;gap:var(--session-practice-card-gutter);padding-inline:calc(var(--session-practice-card-gutter) * 2);scroll-padding-inline:calc(var(--session-practice-card-gutter) * 2)}.session-lesson-mode .session-practice-section #discussions.session-discussion-carousel .session-discussion-card.card{flex-basis:100%}body.session-immersive-active .session-lesson-secondary-btn,body.session-immersive-active 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transparent;background:transparent;color:var(--text-secondary);gap:8px;cursor:pointer;overflow:hidden;transition:border-color var(--dur-base) var(--ease-out-expo),background var(--dur-base) var(--ease-out-expo),box-shadow var(--dur-base) var(--ease-out-expo),transform var(--dur-fast) var(--ease-out-expo)}.lecture-voice-control:after{display:none}.lecture-voice-control:hover,.lecture-voice-control:focus-within{border-color:color-mix(in srgb,var(--border) 82%,var(--accent) 18%);background:color-mix(in srgb,var(--bg-card) 72%,transparent);box-shadow:none}.lecture-voice-avatar{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;flex:0 0 22px;border-radius:50%;border:1px solid color-mix(in srgb,var(--border) 74%,var(--text-muted) 26%);background:color-mix(in srgb,var(--bg-card) 78%,transparent);color:var(--text-muted);font-size:.68rem;font-weight:780;box-shadow:none}.lecture-voice-name{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text-secondary);font-size:.78rem;font-weight:740;letter-spacing:0}.lecture-controls-row .lecture-voice-select{position:absolute;inset:0;width:100%;max-width:none;min-width:0;height:100%;min-height:0;padding:0;border:0;opacity:0;cursor:pointer}.lecture-transport-controls{gap:10px}.lecture-skip-btn{width:44px;min-width:44px;height:44px;min-height:44px;border-color:color-mix(in srgb,var(--border) 72%,transparent);background:color-mix(in srgb,var(--bg-card) 58%,transparent);color:var(--text-secondary);box-shadow:none}.lecture-skip-btn .icon{width:23px;height:23px}.lecture-play-btn{width:58px;height:58px;background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 86%,#fff 14%),color-mix(in srgb,var(--accent) 94%,#1f2937 6%));box-shadow:0 13px 30px color-mix(in srgb,var(--accent) 22%,transparent),inset 0 1px #ffffff52}.lecture-play-btn:hover{background:linear-gradient(145deg,color-mix(in srgb,var(--accent-hover) 88%,#fff 12%),var(--accent-hover));box-shadow:0 14px 32px color-mix(in srgb,var(--accent) 26%,transparent),inset 0 1px #ffffff57}.lecture-play-btn .icon{width:22px;height:22px}.lecture-speed-control{min-width:78px}.lecture-speed-btn{min-width:78px;min-height:42px;padding:0 13px;border-radius:999px;border-color:color-mix(in srgb,var(--border) 72%,transparent);background:color-mix(in srgb,var(--bg-card) 64%,transparent);color:var(--text-primary);font-size:.82rem;font-weight:780;font-variant-numeric:tabular-nums;box-shadow:none}.lecture-speed-btn:after{content:"";width:6px;height:6px;margin-left:7px;border-right:1.7px solid currentColor;border-bottom:1.7px solid currentColor;transform:translateY(-2px) rotate(45deg);opacity:.62}.lecture-skip-btn:hover,.lecture-speed-btn:hover,.lecture-speed-btn[aria-expanded=true]{border-color:color-mix(in srgb,var(--accent) 46%,var(--border));background:color-mix(in srgb,var(--accent-subtle) 38%,var(--bg-card) 62%);color:var(--text-primary);box-shadow:none}.lecture-speed-sheet{left:50%;right:auto;bottom:calc(100% + 12px);width:min(440px,calc(100vw - 48px));padding:12px 18px 17px;border:1px solid color-mix(in srgb,var(--border) 78%,#fff 22%);border-radius:18px;background:linear-gradient(180deg,color-mix(in srgb,var(--bg-card) 96%,#fff 4%),color-mix(in srgb,var(--bg-secondary) 90%,#fff 10%));color:var(--text-primary);box-shadow:0 22px 58px #0f172a29,0 7px 16px #0f172a12,inset 0 1px #ffffffc7;transform:translate(-50%);animation:lectureSpeedSheetIn .24s var(--ease-out-expo)}.lecture-speed-sheet[hidden]{display:none!important}.lecture-speed-sheet-handle{width:44px;height:4px;margin-bottom:18px;background:color-mix(in srgb,var(--text-muted) 18%,transparent)}.lecture-speed-sheet-title{margin-bottom:6px;color:var(--text-muted);font-size:.74rem;font-weight:760;letter-spacing:.01em}.lecture-speed-stepper{display:grid;grid-template-columns:48px minmax(0,1fr) 48px;align-items:center;gap:10px;margin-bottom:14px}.lecture-speed-step-btn{width:40px;height:40px;justify-self:center;border:1px solid color-mix(in srgb,var(--border) 74%,transparent);border-radius:50%;background:color-mix(in srgb,var(--bg-card) 72%,transparent);color:var(--text-secondary);display:inline-flex;align-items:center;justify-content:center;font:inherit;font-size:1.35rem;font-weight:380;line-height:1;cursor:pointer;box-shadow:none;transition:transform var(--dur-fast) var(--ease-out-expo),border-color var(--dur-base) var(--ease-out-expo),background var(--dur-base) var(--ease-out-expo),box-shadow var(--dur-base) var(--ease-out-expo)}.lecture-speed-step-btn:hover,.lecture-speed-step-btn:focus-visible{border-color:color-mix(in srgb,var(--accent) 42%,var(--border));background:color-mix(in srgb,var(--accent-subtle) 32%,var(--bg-card) 68%);color:var(--text-primary)}.lecture-speed-step-btn:active{transform:scale(.95)}.lecture-speed-sheet-value{margin:0;text-align:center;color:var(--text-primary);font-size:clamp(1.65rem,5vw,2.1rem);line-height:1;font-weight:760;letter-spacing:0;font-variant-numeric:tabular-nums}.lecture-speed-range-shell{position:relative;padding:0 2px}.lecture-speed-range{--lecture-speed-progress: 12%;position:relative;z-index:2;width:100%;height:28px;margin:0;border-radius:999px;background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 84%,#4f46e5 16%) 0 var(--lecture-speed-progress),color-mix(in srgb,var(--text-primary) 7%,transparent) var(--lecture-speed-progress) 100%);box-shadow:inset 0 1px 2px #0f172a14;cursor:pointer;-webkit-appearance:none;appearance:none}.lecture-speed-range::-webkit-slider-runnable-track{height:28px;border-radius:999px;background:transparent}.lecture-speed-range::-moz-range-track{height:28px;border-radius:999px;background:transparent}.lecture-speed-range::-webkit-slider-thumb{width:34px;height:34px;margin-top:-3px;border:1px solid color-mix(in srgb,var(--accent) 38%,#fff 62%);border-radius:50%;background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 88%,#fff 12%),color-mix(in srgb,var(--accent) 96%,#1f2937 4%));box-shadow:0 7px 15px color-mix(in srgb,var(--accent) 18%,transparent),inset 0 1px #ffffff57;-webkit-appearance:none;appearance:none;transition:transform var(--dur-fast) var(--ease-out-expo)}.lecture-speed-range::-moz-range-thumb{width:34px;height:34px;border:1px solid color-mix(in srgb,var(--accent) 38%,#fff 62%);border-radius:50%;background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 88%,#fff 12%),color-mix(in srgb,var(--accent) 96%,#1f2937 4%));box-shadow:0 7px 15px color-mix(in srgb,var(--accent) 18%,transparent),inset 0 1px #ffffff57;transition:transform var(--dur-fast) var(--ease-out-expo)}.lecture-speed-range:active::-webkit-slider-thumb{transform:scale(1.06)}.lecture-speed-range:active::-moz-range-thumb{transform:scale(1.06)}.lecture-speed-range-ticks{position:absolute;z-index:3;inset:0 18px;display:flex;align-items:center;justify-content:space-between;pointer-events:none}.lecture-speed-range-ticks span{width:2px;height:8px;border-radius:999px;background:#ffffff6b;mix-blend-mode:screen}.lecture-speed-range-labels{display:flex;justify-content:space-between;margin-top:9px;color:var(--text-muted);font-size:.76rem;font-weight:720;font-variant-numeric:tabular-nums}.lecture-player.speed-sheet-open .lecture-player-body{opacity:.68;filter:saturate(.88);transition:opacity var(--dur-base) var(--ease-out-expo),filter var(--dur-base) var(--ease-out-expo)}.lecture-player.speed-sheet-open .lecture-snip-row,.lecture-player.speed-sheet-open .lecture-follow-lock-btn{opacity:0;pointer-events:none}.lecture-snip-row{bottom:calc(var(--lecture-snip-bottom) + 8px + env(safe-area-inset-bottom,0px))}.lecture-snip-btn{min-height:34px;padding:0 13px;gap:6px;border-color:color-mix(in srgb,var(--border) 76%,#10b981 24%)!important;background:color-mix(in srgb,var(--bg-card) 78%,transparent)!important;color:color-mix(in srgb,var(--text-secondary) 82%,#047857 18%)!important;font-size:.78rem;font-weight:760;opacity:.8;box-shadow:0 10px 26px #0f172a14,inset 0 1px #ffffffa8}.lecture-snip-btn:hover,.lecture-snip-btn:focus-visible{opacity:1;border-color:color-mix(in srgb,#10b981 42%,var(--border))!important;background:color-mix(in srgb,#10b981 7%,var(--bg-card) 93%)!important}.lecture-snip-btn .icon{width:15px;height:15px}@keyframes lectureSpeedSheetIn{0%{opacity:0;transform:translate(-50%) translateY(18px) scale(.985)}to{opacity:1;transform:translate(-50%) translateY(0) scale(1)}}@media(max-width:640px){.lecture-player{--lecture-snip-bottom: 112px}.lecture-player-controls{padding:6px 10px calc(14px + env(safe-area-inset-bottom,0px))}.lecture-progress-bar{max-width:calc(100% - 34px);height:4px;margin-bottom:6px}.lecture-controls-row{grid-template-columns:minmax(74px,1fr) minmax(150px,auto) minmax(72px,1fr);gap:6px;width:calc(100% - 12px);margin-top:22px;padding:8px}.lecture-time{top:-25px;font-size:.76rem}.lecture-voice-control{min-width:74px;min-height:42px;width:auto;padding:0 9px;justify-self:start}.lecture-voice-avatar{width:18px;height:18px;flex-basis:18px;font-size:.58rem}.lecture-voice-name{display:inline-block;max-width:48px;font-size:.72rem}.lecture-transport-controls{min-width:150px;gap:6px}.lecture-skip-btn{width:40px;min-width:40px;height:40px;min-height:40px}.lecture-skip-btn .icon{width:21px;height:21px}.lecture-play-btn{width:54px;height:54px}.lecture-speed-control{min-width:72px}.lecture-speed-btn{min-width:72px;min-height:40px;padding:0 10px;font-size:.76rem}.lecture-speed-btn:after{width:6px;height:6px;margin-left:6px;border-width:1.8px}.lecture-speed-sheet{bottom:calc(100% + 10px);width:calc(100vw - 48px);padding:12px 16px 16px;border-radius:18px}.lecture-speed-sheet-handle{margin-bottom:16px}.lecture-speed-stepper{grid-template-columns:42px minmax(0,1fr) 42px;gap:9px;margin-bottom:14px}.lecture-speed-step-btn{width:36px;height:36px;font-size:1.25rem}.lecture-speed-sheet-value{font-size:clamp(1.65rem,8vw,2.05rem)}.lecture-speed-range,.lecture-speed-range::-webkit-slider-runnable-track,.lecture-speed-range::-moz-range-track{height:28px}.lecture-speed-range::-webkit-slider-thumb{width:34px;height:34px}.lecture-speed-range::-moz-range-thumb{width:34px;height:34px}}@media(max-width:380px){.lecture-controls-row{grid-template-columns:64px minmax(142px,auto) 66px;gap:5px;padding:7px}.lecture-voice-control{min-width:64px;min-height:38px;padding:0 8px}.lecture-voice-avatar{display:none}.lecture-voice-name{max-width:46px}.lecture-transport-controls{min-width:142px;gap:5px}.lecture-skip-btn{width:38px;min-width:38px;height:38px;min-height:38px}.lecture-play-btn{width:50px;height:50px}.lecture-speed-btn{min-width:66px;min-height:38px;font-size:.72rem}.lecture-speed-sheet{width:calc(100vw - 28px);padding-inline:14px}}@media(prefers-reduced-motion:reduce){.lecture-speed-sheet{animation:none}.lecture-player.speed-sheet-open .lecture-player-body{transition:none}}.lecture-player{--lecture-snip-bottom: 116px}.lecture-player-controls{border-top:1px solid var(--border);background:var(--bg-secondary);padding:10px 24px 16px;box-shadow:0 -10px 30px #0f172a0f}.lecture-progress-bar{width:100%;max-width:none;height:7px;margin:0 0 14px;background:color-mix(in srgb,var(--border) 72%,transparent);box-shadow:none}.lecture-progress-fill{background:linear-gradient(90deg,var(--accent),color-mix(in srgb,var(--accent) 76%,#ffffff 24%))}.lecture-controls-row{display:grid;grid-template-columns:minmax(84px,1fr) auto minmax(84px,1fr);grid-template-areas:"time time time" "voice transport speed";align-items:center;width:100%;max-width:none;margin:0;padding:0;gap:10px 12px;border:0;border-radius:0;background:transparent;box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none}.lecture-time{position:static;grid-area:time;transform:none;width:auto;text-align:center;color:var(--text-muted);font-size:.82rem;font-weight:500}.lecture-voice-control{position:relative;grid-area:voice;justify-self:start;min-width:0;min-height:0;width:auto;padding:0;border:0;border-radius:0;background:transparent;overflow:visible}.lecture-voice-control:after{content:"";display:block;position:absolute;right:13px;top:50%;width:7px;height:7px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;color:var(--text-secondary);pointer-events:none;transform:translateY(-65%) rotate(45deg)}.lecture-voice-avatar,.lecture-voice-name{display:none}.lecture-controls-row .lecture-voice-select{position:static;inset:auto;width:min(116px,100%);min-width:92px;max-width:116px;height:auto;min-height:38px;margin-left:0!important;padding:0 30px 0 16px;border:1px solid color-mix(in srgb,var(--border) 82%,var(--text-muted) 18%);border-radius:999px;background:color-mix(in srgb,var(--bg-card) 78%,transparent);color:var(--text-secondary);opacity:1;font-size:.78rem;font-weight:760;line-height:1;box-shadow:none;-webkit-appearance:none;appearance:none;text-align:center;text-align-last:center;cursor:pointer}.lecture-transport-controls{grid-area:transport;width:max-content;gap:14px}.lecture-skip-btn{width:50px;min-width:50px;height:50px;min-height:50px;border-color:color-mix(in srgb,var(--border) 82%,var(--text-muted) 18%);background:color-mix(in srgb,var(--bg-card) 78%,transparent);color:var(--text-secondary);box-shadow:none}.lecture-skip-btn .icon{width:26px;height:26px}.lecture-play-btn{width:64px;height:64px;background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 84%,#ffffff 16%),var(--accent));box-shadow:0 12px 28px color-mix(in srgb,var(--accent) 26%,transparent)}.lecture-play-btn:hover{background:var(--accent-hover);box-shadow:0 14px 34px color-mix(in srgb,var(--accent) 32%,transparent)}.lecture-play-btn .icon{width:21px;height:21px}.lecture-speed-control{grid-area:speed;justify-self:end;min-width:0}.lecture-speed-btn{min-width:56px;min-height:38px;padding:0 13px;border-color:color-mix(in srgb,var(--border) 78%,var(--text-muted) 22%);background:color-mix(in srgb,var(--bg-card) 78%,transparent);color:var(--text-primary);font-size:.8rem;font-weight:820}.lecture-speed-btn:after{width:6px;height:6px;margin-left:7px;border-width:1.7px}.lecture-skip-btn:hover,.lecture-speed-btn:hover,.lecture-speed-btn[aria-expanded=true],.lecture-controls-row .lecture-voice-select:hover,.lecture-controls-row .lecture-voice-select:focus{border-color:color-mix(in srgb,var(--accent) 54%,var(--border));background:var(--accent-subtle);color:var(--text-primary);box-shadow:none}[data-theme=dark] .lecture-player-controls{border-top-color:color-mix(in srgb,#272b45 82%,transparent);background:#151827;box-shadow:0 -10px 28px #00000038}[data-theme=dark] .lecture-progress-bar{background:#2a2d4a}[data-theme=dark] .lecture-progress-fill{background:#6a5ce7}[data-theme=dark] .lecture-time{color:#7f86a3}[data-theme=dark] .lecture-controls-row .lecture-voice-select,[data-theme=dark] .lecture-skip-btn,[data-theme=dark] .lecture-speed-btn{border-color:#343852;background:transparent;color:#aeb4ca}[data-theme=dark] .lecture-voice-control:after{color:#8e95b2}[data-theme=dark] .lecture-skip-btn:hover,[data-theme=dark] .lecture-speed-btn:hover,[data-theme=dark] .lecture-speed-btn[aria-expanded=true],[data-theme=dark] .lecture-controls-row .lecture-voice-select:hover,[data-theme=dark] .lecture-controls-row .lecture-voice-select:focus{border-color:#5f57cb;background:#6a5ce71a;color:#eef0ff}[data-theme=dark] .lecture-play-btn{background:#6a5ce7;color:#fff;box-shadow:0 10px 24px #6a5ce73d}[data-theme=dark] .lecture-play-btn:hover{background:#7668ee;box-shadow:0 12px 28px #6a5ce74d}[data-theme=dark] .lecture-speed-sheet{border-color:#30344d;background:#191c2d;color:#f2f3ff;box-shadow:0 24px 64px #00000057,inset 0 1px #ffffff0a}[data-theme=dark] .lecture-speed-sheet-handle{background:#3a3e5b}[data-theme=dark] .lecture-speed-sheet-title,[data-theme=dark] .lecture-speed-range-labels{color:#8e95b2}[data-theme=dark] .lecture-speed-step-btn{border-color:#30344d;background:transparent;color:#b7bdd5}[data-theme=dark] .lecture-speed-step-btn:hover,[data-theme=dark] .lecture-speed-step-btn:focus-visible{border-color:#5f57cb;background:#6a5ce71a;color:#f2f3ff}[data-theme=dark] .lecture-speed-range{background:linear-gradient(90deg,#6a5ce7 0 var(--lecture-speed-progress),#2a2d4a var(--lecture-speed-progress) 100%)}[data-theme=dark] .lecture-speed-range::-webkit-slider-thumb{border-color:#7a70f0;background:#6a5ce7;box-shadow:0 7px 16px #6a5ce742}[data-theme=dark] .lecture-speed-range::-moz-range-thumb{border-color:#7a70f0;background:#6a5ce7;box-shadow:0 7px 16px #6a5ce742}@media(max-width:640px){.lecture-player{--lecture-snip-bottom: 188px}.lecture-player-controls{padding:10px 16px calc(16px + env(safe-area-inset-bottom,0px))}.lecture-progress-bar{height:8px;margin-bottom:10px}.lecture-controls-row{grid-template-columns:minmax(88px,1fr) minmax(162px,auto) minmax(88px,1fr);grid-template-areas:"time time time" "voice transport speed";gap:8px}.lecture-transport-controls{min-width:162px;gap:7px}.lecture-skip-btn{width:44px;min-width:44px;height:44px;min-height:44px}.lecture-play-btn{width:60px;height:60px}.lecture-controls-row .lecture-voice-select{width:min(108px,100%);min-width:86px;max-width:108px;min-height:36px;padding:0 28px 0 14px;font-size:.78rem}.lecture-speed-btn{min-width:58px;min-height:36px;padding:0 11px}}@media(max-width:380px){.lecture-controls-row{grid-template-columns:minmax(80px,1fr) minmax(150px,auto) minmax(80px,1fr);column-gap:8px}.lecture-transport-controls{min-width:150px;gap:4px}.lecture-skip-btn{width:42px;min-width:42px;height:42px;min-height:42px}.lecture-play-btn{width:58px;height:58px}.lecture-controls-row .lecture-voice-select{width:min(92px,100%);min-width:78px;max-width:92px;padding:0 24px 0 12px;font-size:.74rem}}.lecture-player{--lecture-snip-bottom: 128px}.lecture-player-controls{border-top:1px solid color-mix(in srgb,var(--border) 74%,transparent);background:color-mix(in srgb,var(--bg-secondary) 96%,transparent);padding:11px 24px calc(18px + env(safe-area-inset-bottom,0px));box-shadow:0 -12px 26px #0f172a0b}.lecture-progress-bar{height:6px;margin:0 0 13px;border-radius:999px;background:color-mix(in srgb,var(--border) 64%,transparent)}.lecture-progress-fill{background:color-mix(in srgb,var(--accent) 88%,#5b50d6 12%)}.lecture-controls-row{grid-template-columns:minmax(108px,1fr) auto minmax(82px,1fr);gap:8px 12px}.lecture-time{color:color-mix(in srgb,var(--text-muted) 92%,var(--text-primary) 8%);font-size:.78rem;font-weight:560;font-variant-numeric:tabular-nums}.lecture-controls-row .lecture-voice-select,.lecture-speed-btn{min-height:36px;border-color:color-mix(in srgb,var(--border) 76%,transparent);background:color-mix(in srgb,var(--bg-card) 58%,transparent);color:color-mix(in srgb,var(--text-secondary) 92%,var(--text-primary) 8%);font-weight:760;box-shadow:none}.lecture-controls-row .lecture-voice-select{width:min(112px,100%);min-width:92px;max-width:112px;padding:0 30px 0 15px}.lecture-speed-btn{min-width:54px;padding:0 12px;font-variant-numeric:tabular-nums}.lecture-skip-btn{width:46px;min-width:46px;height:46px;min-height:46px;border-color:color-mix(in srgb,var(--border) 72%,transparent);background:color-mix(in srgb,var(--bg-card) 44%,transparent);color:color-mix(in srgb,var(--text-secondary) 88%,var(--text-primary) 12%)}.lecture-skip-btn .icon{width:24px;height:24px}.lecture-play-btn{width:60px;height:60px;background:color-mix(in srgb,var(--accent) 92%,#ffffff 8%);box-shadow:0 10px 22px color-mix(in srgb,var(--accent) 20%,transparent),inset 0 1px #ffffff3d}.lecture-play-btn:hover,.lecture-play-btn:focus-visible{background:var(--accent-hover);box-shadow:0 12px 26px color-mix(in srgb,var(--accent) 25%,transparent),inset 0 1px #ffffff42}.lecture-play-btn .icon{width:20px;height:20px}.lecture-skip-btn:hover,.lecture-speed-btn:hover,.lecture-speed-btn[aria-expanded=true],.lecture-controls-row .lecture-voice-select:hover,.lecture-controls-row .lecture-voice-select:focus{border-color:color-mix(in srgb,var(--accent) 48%,var(--border));background:color-mix(in srgb,var(--accent-subtle) 68%,var(--bg-card) 32%);color:var(--text-primary)}.lecture-speed-sheet{left:50%;right:auto;bottom:calc(100% + 13px);width:min(386px,calc(100vw - 44px));padding:12px 18px 18px;border:1px solid color-mix(in srgb,var(--border) 70%,transparent);border-radius:20px;background:color-mix(in srgb,var(--bg-card) 94%,var(--bg-secondary) 6%);color:var(--text-primary);box-shadow:0 20px 48px #0f172a26,0 5px 14px #0f172a0f,inset 0 1px #ffffff9e;transform:translate(-50%);animation:lectureSpeedSheetIn .22s var(--ease-out-expo)}.lecture-speed-sheet-handle{width:42px;height:4px;margin:0 auto 15px;background:color-mix(in srgb,var(--text-muted) 22%,transparent)}.lecture-speed-sheet-title{margin:0 0 6px;text-align:center;color:color-mix(in srgb,var(--text-secondary) 88%,var(--text-primary) 12%);font-size:.83rem;font-weight:780;letter-spacing:0}.lecture-speed-stepper{grid-template-columns:48px minmax(0,1fr) 48px;gap:12px;margin-bottom:17px}.lecture-speed-step-btn{width:42px;height:42px;border-color:color-mix(in srgb,var(--border) 72%,transparent);background:color-mix(in srgb,var(--bg-secondary) 64%,transparent);color:var(--text-secondary);font-size:1.38rem;font-weight:360}.lecture-speed-sheet-value{font-size:clamp(2.05rem,8vw,2.8rem);font-weight:720;letter-spacing:0}.lecture-speed-range-shell{padding:0 1px}.lecture-speed-range{height:25px;background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 90%,#4f46e5 10%) 0 var(--lecture-speed-progress),color-mix(in srgb,var(--text-primary) 7%,transparent) var(--lecture-speed-progress) 100%);box-shadow:inset 0 1px 2px #0f172a14}.lecture-speed-range::-webkit-slider-runnable-track,.lecture-speed-range::-moz-range-track{height:25px}.lecture-speed-range::-webkit-slider-thumb{width:32px;height:32px;margin-top:-3.5px;border-color:color-mix(in srgb,var(--accent) 44%,#ffffff 56%);background:color-mix(in srgb,var(--accent) 96%,#ffffff 4%);box-shadow:0 7px 14px color-mix(in srgb,var(--accent) 19%,transparent)}.lecture-speed-range::-moz-range-thumb{width:32px;height:32px;border-color:color-mix(in srgb,var(--accent) 44%,#ffffff 56%);background:color-mix(in srgb,var(--accent) 96%,#ffffff 4%);box-shadow:0 7px 14px color-mix(in srgb,var(--accent) 19%,transparent)}.lecture-speed-range-labels{margin-top:10px;color:color-mix(in srgb,var(--text-muted) 88%,var(--text-primary) 12%);font-size:.75rem;font-weight:700}.lecture-speed-range-ticks{inset:0 16px}.lecture-speed-range-ticks span{width:2px;height:7px;opacity:.56}.lecture-player.speed-sheet-open .lecture-player-body{opacity:.74;filter:saturate(.92)}[data-theme=dark] .lecture-player-controls{border-top-color:#242840;background:#151827;box-shadow:0 -12px 26px #0003}[data-theme=dark] .lecture-progress-bar{background:#2a2e49}[data-theme=dark] .lecture-progress-fill,[data-theme=dark] .lecture-play-btn{background:#6a5ce7}[data-theme=dark] .lecture-time{color:#8289a7}[data-theme=dark] .lecture-controls-row .lecture-voice-select,[data-theme=dark] .lecture-skip-btn,[data-theme=dark] .lecture-speed-btn{border-color:#333850;background:transparent;color:#aeb4ca}[data-theme=dark] .lecture-voice-control:after{color:#8f96b2}[data-theme=dark] .lecture-play-btn{color:#fff;box-shadow:0 10px 22px #6a5ce738,inset 0 1px #ffffff24}[data-theme=dark] .lecture-play-btn:hover,[data-theme=dark] .lecture-play-btn:focus-visible{background:#7467ee;box-shadow:0 12px 26px #6a5ce745,inset 0 1px #ffffff29}[data-theme=dark] .lecture-skip-btn:hover,[data-theme=dark] .lecture-speed-btn:hover,[data-theme=dark] .lecture-speed-btn[aria-expanded=true],[data-theme=dark] .lecture-controls-row .lecture-voice-select:hover,[data-theme=dark] .lecture-controls-row .lecture-voice-select:focus{border-color:#5e58ca;background:#6a5ce718;color:#f0f2ff}[data-theme=dark] .lecture-speed-sheet{border-color:#2d3249;background:#191c2d;color:#f4f5ff;box-shadow:0 24px 58px #00000057,inset 0 1px #ffffff0b}[data-theme=dark] .lecture-speed-sheet-handle{background:#3b405b}[data-theme=dark] .lecture-speed-sheet-title,[data-theme=dark] .lecture-speed-range-labels{color:#9097b4}[data-theme=dark] .lecture-speed-step-btn{border-color:#30354d;background:transparent;color:#b8bed4}[data-theme=dark] .lecture-speed-step-btn:hover,[data-theme=dark] .lecture-speed-step-btn:focus-visible{border-color:#5e58ca;background:#6a5ce718;color:#f4f5ff}[data-theme=dark] .lecture-speed-range{background:linear-gradient(90deg,#6a5ce7 0 var(--lecture-speed-progress),#2a2e49 var(--lecture-speed-progress) 100%)}[data-theme=dark] .lecture-speed-range::-webkit-slider-thumb,[data-theme=dark] .lecture-speed-range::-moz-range-thumb{border-color:#756bee;background:#6a5ce7;box-shadow:0 7px 15px #6a5ce740}@media(max-width:640px){.lecture-player{--lecture-snip-bottom: 170px}.lecture-player-controls{padding:10px 16px calc(16px + env(safe-area-inset-bottom,0px))}.lecture-controls-row{grid-template-columns:minmax(88px,1fr) minmax(152px,auto) minmax(78px,1fr);gap:8px}.lecture-progress-bar{height:6px;margin-bottom:12px}.lecture-controls-row .lecture-voice-select{width:min(104px,100%);min-width:84px;min-height:36px;padding:0 28px 0 13px}.lecture-transport-controls{min-width:152px;gap:6px}.lecture-skip-btn{width:42px;min-width:42px;height:42px;min-height:42px}.lecture-play-btn{width:60px;min-width:60px;height:60px;min-height:60px}.lecture-speed-btn{min-width:54px;min-height:36px}.lecture-speed-sheet{width:calc(100vw - 42px);padding:12px 16px 17px}}@media(max-width:380px){.lecture-controls-row{grid-template-columns:minmax(74px,1fr) minmax(142px,auto) minmax(66px,1fr);column-gap:6px}.lecture-controls-row .lecture-voice-select{width:min(88px,100%);min-width:72px;padding:0 23px 0 11px;font-size:.72rem}.lecture-transport-controls{min-width:142px;gap:4px}.lecture-skip-btn{width:40px;min-width:40px;height:40px;min-height:40px}.lecture-play-btn{width:54px;height:54px}.lecture-speed-btn{min-width:50px;padding:0 10px;font-size:.74rem}}@media(prefers-reduced-motion:no-preference){@view-transition{navigation:auto}::view-transition-old(root),::view-transition-new(root){animation-duration:.22s;animation-timing-function:cubic-bezier(.22,1,.36,1);mix-blend-mode:normal}::view-transition-old(root){animation-name:curio-page-out}::view-transition-new(root){animation-name:curio-page-in}@keyframes curio-page-out{0%{opacity:1;filter:blur(0);transform:scale(1)}to{opacity:0;filter:blur(3px);transform:scale(.992)}}@keyframes curio-page-in{0%{opacity:0;filter:blur(3px);transform:scale(1.006)}to{opacity:1;filter:blur(0);transform:scale(1)}}}