:root{--bg-input:var(--bg-tertiary);--bg-hover:var(--hover-overlay)}:root[data-mode=light],:root[data-theme=light]{--color-success:22, 163, 74;--color-warning:234, 88, 12;--color-danger:220, 38, 38;--color-user-highlight:253, 230, 138;--color-user-highlight-text:23, 23, 23;--difficulty-original:234, 179, 8;--difficulty-original-bg:254, 243, 199;--difficulty-neg1:134, 239, 172;--difficulty-neg1-bg:220, 252, 231;--difficulty-neg2:22, 163, 74;--difficulty-neg2-bg:187, 247, 208;--difficulty-pos1:252, 165, 165;--difficulty-pos1-bg:254, 226, 226;--difficulty-pos2:220, 38, 38;--difficulty-pos2-bg:254, 202, 202;--widget-accent-visual:180, 130, 60;--widget-accent-quiz:65, 120, 180;--widget-accent-exercise:22, 163, 74;--widget-accent-reference:120, 100, 160;--widget-accent-interactive:190, 80, 60;--dialogue-bubble-a:74, 108, 185;--dialogue-bubble-b:95, 108, 125;--dialogue-bubble-a-text:255, 255, 255;--dialogue-bubble-b-text:255, 255, 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255;--btn-primary-border:var(--btn-primary-bg);--btn-secondary-bg:230, 215, 195;--btn-secondary-border:203, 188, 168;--btn-secondary-text:60, 40, 25;--btn-secondary-hover-bg:220, 205, 185;--btn-secondary-hover-border:188, 172, 150;--btn-tertiary-bg:240, 233, 220;--btn-tertiary-border:220, 210, 195;--btn-tertiary-text:60, 40, 25;--btn-tertiary-hover-bg:232, 225, 210;--btn-tertiary-hover-border:205, 195, 178;--btn-ghost-bg:252, 248, 242;--btn-ghost-border:220, 210, 195;--btn-ghost-text:120, 100, 85;--btn-ghost-hover-bg:247, 242, 234;--btn-ghost-hover-border:203, 188, 168;--btn-danger-bg:254, 226, 226;--btn-danger-border:252, 165, 165;--btn-danger-text:185, 28, 28;--btn-danger-hover-bg:220, 38, 38;--btn-disabled-bg:228, 218, 205;--btn-disabled-text:158, 138, 118;--btn-disabled-border:210, 200, 185;--terminal-bg:252, 248, 242;--terminal-border:203, 188, 168;--terminal-text:60, 40, 25;--terminal-command:154, 82, 32;--terminal-muted:120, 100, 85;--dialogue-bubble-a:154, 82, 32;--dialogue-bubble-b:238, 228, 215;--dialogue-bubble-a-text:255, 255, 255;--dialogue-bubble-b-text:60, 40, 25}:root[data-theme=cliff][data-mode=dark],:root[data-color-theme=cliff][data-theme=dark]{--bg-primary:32, 26, 22;--bg-secondary:46, 38, 30;--bg-tertiary:62, 52, 44;--input-disabled-bg:28, 22, 18;--input-disabled-text:110, 98, 88;--bg-surface-elevated:58, 48, 38;--glass-bg:40, 32, 26;--modal-backdrop:0, 0, 0;--overlay-dim:#0009;--overlay-subtle:#0003;--tier-shadow-default:0 1px 1px #00000080;--tier-pro-text-shadow:0 1px 0 #0006;--tier-pro-box-shadow:0 1px 3px #daa52033;--bg-progress-track:68, 58, 50;--bg-progress-fill:42, 175, 182;--bg-header-contrast:62, 52, 44;--text-main:250, 242, 230;--text-muted:160, 145, 130;--text-contrast:255, 255, 255;--text-accent:42, 175, 182;--border-default:62, 52, 44;--border-focus:42, 175, 182;--border-glass:62, 52, 44;--hover-overlay:46, 38, 30;--active-overlay:62, 52, 44;--menu-item-bg:46, 38, 30;--menu-item-text:250, 242, 230;--menu-item-hover-bg:54, 44, 36;--menu-item-active-bg:62, 52, 44;--menu-item-active-border:42, 175, 182;--btn-primary-bg:251, 146, 60;--btn-primary-text:32, 26, 22;--btn-primary-hover-bg:253, 164, 88;--btn-primary-hover-text:32, 26, 22;--btn-primary-active-bg:235, 128, 42;--btn-primary-active-text:32, 26, 22;--btn-primary-border:var(--btn-primary-bg);--btn-secondary-bg:62, 52, 44;--btn-secondary-border:80, 68, 56;--btn-secondary-text:250, 242, 230;--btn-secondary-hover-bg:74, 62, 52;--btn-secondary-hover-border:92, 78, 66;--btn-tertiary-bg:46, 38, 30;--btn-tertiary-border:62, 52, 44;--btn-tertiary-text:250, 242, 230;--btn-tertiary-hover-bg:56, 46, 38;--btn-tertiary-hover-border:74, 62, 52;--btn-ghost-bg:40, 32, 26;--btn-ghost-border:62, 52, 44;--btn-ghost-text:160, 145, 130;--btn-ghost-hover-bg:46, 38, 30;--btn-ghost-hover-border:74, 62, 52;--btn-danger-bg:60, 24, 24;--btn-danger-border:127, 29, 29;--btn-danger-text:252, 165, 165;--btn-danger-hover-bg:239, 68, 68;--btn-disabled-bg:45, 36, 30;--btn-disabled-text:105, 90, 75;--btn-disabled-border:56, 46, 38;--terminal-bg:32, 26, 22;--terminal-border:62, 52, 44;--terminal-text:250, 242, 230;--terminal-command:251, 146, 60;--terminal-muted:160, 145, 130;--dialogue-bubble-a:235, 130, 50;--dialogue-bubble-b:85, 62, 42;--dialogue-bubble-a-text:32, 26, 22;--dialogue-bubble-b-text:250, 242, 230}:root[data-theme=library][data-mode=light],:root[data-color-theme=library][data-theme=light]{--bg-primary:250, 247, 240;--bg-secondary:238, 233, 218;--bg-tertiary:228, 220, 204;--input-disabled-bg:215, 206, 188;--input-disabled-text:135, 120, 98;--bg-surface-elevated:255, 253, 248;--glass-bg:252, 250, 244;--modal-backdrop:0, 0, 0;--overlay-dim:#00000080;--overlay-subtle:#0000001a;--tier-shadow-default:0 1px 1px #00000040;--tier-pro-text-shadow:0 1px 0 #fff6;--tier-pro-box-shadow:0 1px 3px #daa52066;--bg-progress-track:200, 190, 175;--bg-progress-fill:133, 77, 14;--bg-header-contrast:50, 38, 25;--text-main:50, 38, 25;--text-muted:100, 90, 72;--text-contrast:255, 255, 255;--text-accent:52, 70, 128;--border-default:200, 188, 168;--border-focus:52, 70, 128;--border-glass:232, 220, 200;--hover-overlay:245, 240, 230;--active-overlay:233, 226, 210;--menu-item-bg:250, 247, 240;--menu-item-text:50, 38, 25;--menu-item-hover-bg:245, 240, 230;--menu-item-active-bg:233, 226, 210;--menu-item-active-border:52, 70, 128;--btn-primary-bg:133, 77, 14;--btn-primary-text:255, 255, 255;--btn-primary-hover-bg:146, 90, 28;--btn-primary-hover-text:255, 255, 255;--btn-primary-active-bg:118, 65, 8;--btn-primary-active-text:255, 255, 255;--btn-primary-border:var(--btn-primary-bg);--btn-secondary-bg:228, 215, 190;--btn-secondary-border:200, 188, 168;--btn-secondary-text:50, 38, 25;--btn-secondary-hover-bg:218, 205, 180;--btn-secondary-hover-border:185, 172, 150;--btn-tertiary-bg:238, 233, 218;--btn-tertiary-border:218, 210, 192;--btn-tertiary-text:50, 38, 25;--btn-tertiary-hover-bg:228, 222, 206;--btn-tertiary-hover-border:204, 196, 178;--btn-ghost-bg:250, 247, 240;--btn-ghost-border:218, 210, 192;--btn-ghost-text:115, 105, 90;--btn-ghost-hover-bg:244, 240, 232;--btn-ghost-hover-border:200, 188, 168;--btn-danger-bg:254, 226, 226;--btn-danger-border:252, 165, 165;--btn-danger-text:185, 28, 28;--btn-danger-hover-bg:220, 38, 38;--btn-disabled-bg:228, 220, 205;--btn-disabled-text:155, 140, 118;--btn-disabled-border:210, 202, 185;--terminal-bg:250, 247, 240;--terminal-border:200, 188, 168;--terminal-text:50, 38, 25;--terminal-command:133, 77, 14;--terminal-muted:115, 105, 90;--dialogue-bubble-a:133, 77, 14;--dialogue-bubble-b:238, 232, 218;--dialogue-bubble-a-text:255, 255, 255;--dialogue-bubble-b-text:50, 38, 25}:root[data-theme=library][data-mode=dark],:root[data-color-theme=library][data-theme=dark]{--bg-primary:30, 27, 22;--bg-secondary:44, 40, 32;--bg-tertiary:58, 52, 44;--input-disabled-bg:26, 23, 18;--input-disabled-text:108, 98, 82;--bg-surface-elevated:54, 48, 40;--glass-bg:36, 32, 26;--modal-backdrop:0, 0, 0;--overlay-dim:#0009;--overlay-subtle:#0003;--tier-shadow-default:0 1px 1px #00000080;--tier-pro-text-shadow:0 1px 0 #0006;--tier-pro-box-shadow:0 1px 3px #daa52033;--bg-progress-track:62, 56, 48;--bg-progress-fill:217, 158, 63;--bg-header-contrast:58, 52, 44;--text-main:245, 238, 225;--text-muted:155, 145, 128;--text-contrast:255, 255, 255;--text-accent:105, 135, 220;--border-default:58, 52, 44;--border-focus:105, 135, 220;--border-glass:58, 52, 44;--hover-overlay:44, 40, 32;--active-overlay:58, 52, 44;--menu-item-bg:44, 40, 32;--menu-item-text:245, 238, 225;--menu-item-hover-bg:50, 46, 38;--menu-item-active-bg:58, 52, 44;--menu-item-active-border:105, 135, 220;--btn-primary-bg:217, 158, 63;--btn-primary-text:30, 27, 22;--btn-primary-hover-bg:227, 172, 85;--btn-primary-hover-text:30, 27, 22;--btn-primary-active-bg:200, 142, 48;--btn-primary-active-text:30, 27, 22;--btn-primary-border:var(--btn-primary-bg);--btn-secondary-bg:58, 52, 44;--btn-secondary-border:76, 68, 56;--btn-secondary-text:245, 238, 225;--btn-secondary-hover-bg:70, 62, 52;--btn-secondary-hover-border:88, 78, 66;--btn-tertiary-bg:44, 40, 32;--btn-tertiary-border:58, 52, 44;--btn-tertiary-text:245, 238, 225;--btn-tertiary-hover-bg:52, 47, 38;--btn-tertiary-hover-border:70, 62, 52;--btn-ghost-bg:36, 32, 26;--btn-ghost-border:58, 52, 44;--btn-ghost-text:155, 145, 128;--btn-ghost-hover-bg:42, 38, 30;--btn-ghost-hover-border:70, 62, 52;--btn-danger-bg:60, 24, 24;--btn-danger-border:127, 29, 29;--btn-danger-text:252, 165, 165;--btn-danger-hover-bg:239, 68, 68;--btn-disabled-bg:45, 40, 34;--btn-disabled-text:102, 92, 75;--btn-disabled-border:56, 50, 42;--terminal-bg:25, 22, 18;--terminal-border:52, 46, 38;--terminal-text:245, 238, 225;--terminal-command:217, 158, 63;--terminal-muted:155, 145, 128;--dialogue-bubble-a:210, 155, 60;--dialogue-bubble-b:72, 54, 36;--dialogue-bubble-a-text:30, 27, 22;--dialogue-bubble-b-text:245, 238, 225}.tutor-highlight{outline:3px solid rgb(var(--btn-primary-bg));outline-offset:4px;border-radius:var(--radius-sm);transition:outline .2s;animation:1s ease-in-out infinite tutor-pulse}@keyframes tutor-pulse{0%,to{outline-color:rgb(var(--btn-primary-bg))}50%{outline-color:rgba(var(--btn-primary-bg), .6)}}.tutor-focused{box-shadow:0 0 0 3px rgba(var(--btn-primary-bg), .3);transition:box-shadow .3s}.tutor-waiting{z-index:100;border:2px solid rgb(var(--color-warning));animation:1.5s ease-in-out infinite tutor-waiting-pulse;position:relative}.tutor-reading-btn{z-index:10000;border-radius:var(--radius-full);background:rgb(var(--btn-primary-bg));color:rgb(var(--btn-primary-text));letter-spacing:.03em;cursor:pointer;box-shadow:var(--shadow-md);white-space:nowrap;border:none;align-items:center;gap:6px;padding:6px 14px;font-size:.8rem;font-weight:700;transition:opacity .15s;display:inline-flex;position:fixed}.tutor-reading-btn:hover{opacity:.88}.tutor-waiting-badge{background:rgb(var(--color-warning));color:rgb(var(--text-contrast));border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.05em;z-index:10000;pointer-events:none;white-space:nowrap;padding:4px 12px;font-size:.75rem;font-weight:700;animation:.6s ease-in-out infinite alternate tutor-badge-bounce;position:fixed;transform:translateY(-50%)}@keyframes tutor-waiting-pulse{0%,to{border-color:rgb(var(--color-warning))}50%{border-color:rgba(var(--color-warning), .5)}}@keyframes tutor-badge-bounce{0%{transform:translateY(-50%)}to{transform:translateY(calc(-50% - 3px))}}.tutor-laser-pointer{background:rgb(var(--color-warning));pointer-events:none;z-index:9999;height:4px;box-shadow:0 0 8px rgba(var(--color-warning), .7);transform-origin:0;border-radius:2px;animation:.7s ease-in-out 3 tutor-laser-sweep;position:fixed}@keyframes tutor-laser-sweep{0%{clip-path:inset(0 100% 0 0)}50%{clip-path:inset(0 0% 0 0)}to{clip-path:inset(0 100% 0 0)}}.tutor-show-hint{outline:3px dashed rgb(var(--color-warning));outline-offset:4px;border-radius:var(--radius-sm)}.tutor-text-target{background:rgb(var(--color-warning));color:rgb(var(--text-contrast));border-radius:2px;padding:0 2px}.tutor-reveal{animation:.4s ease-out tutor-reveal-pop}@keyframes tutor-reveal-pop{0%{opacity:.6;transform:scale(.97)}to{opacity:1;transform:scale(1)}}:root{--spacing-0:0;--spacing-px:.125rem;--spacing-1:.25rem;--spacing-2:.5rem;--spacing-3:.75rem;--spacing-4:1rem;--spacing-5:1.25rem;--spacing-6:1.5rem;--spacing-7:1.75rem;--spacing-8:2rem;--spacing-10:2.5rem;--spacing-12:3rem;--spacing-14:3.5rem;--spacing-16:4rem;--spacing-20:5rem;--spacing-24:6rem;--spacing-28:7rem;--spacing-32:8rem;--spacing-xs:var(--spacing-1);--spacing-sm:var(--spacing-2);--spacing-md:var(--spacing-4);--spacing-lg:var(--spacing-6);--spacing-xl:var(--spacing-8);--spacing-2xl:var(--spacing-10);--spacing-3xl:var(--spacing-12);--spacing-4xl:var(--spacing-16);--spacing-card-padding:var(--spacing-4);--spacing-card-header:var(--spacing-3) var(--spacing-4);--spacing-card-body:var(--spacing-4);--spacing-card-footer:var(--spacing-3) var(--spacing-4);--spacing-card-gap:var(--spacing-4);--spacing-widget-padding:var(--spacing-3);--spacing-widget-gap:var(--spacing-3);--spacing-widget-margin:var(--spacing-4) 0;--spacing-section-padding:var(--spacing-6);--spacing-section-gap:var(--spacing-6);--spacing-section-margin:var(--spacing-8) 0;--spacing-container-padding:var(--spacing-4);--spacing-container-gap:var(--spacing-6);--spacing-list-gap:var(--spacing-2);--spacing-list-item-padding:var(--spacing-3) var(--spacing-4);--spacing-button-padding:var(--spacing-3) var(--spacing-4);--spacing-button-padding-sm:var(--spacing-2) var(--spacing-3);--spacing-button-padding-lg:var(--spacing-3) var(--spacing-6);--spacing-button-gap:var(--spacing-2);--spacing-input-padding:var(--spacing-3) var(--spacing-3);--spacing-form-gap:var(--spacing-4);--spacing-label-margin:0 0 var(--spacing-2) 0;--spacing-header-padding:var(--spacing-4) var(--spacing-6);--spacing-footer-padding:var(--spacing-4) var(--spacing-4);--spacing-modal-padding:var(--spacing-6);--spacing-modal-gap:var(--spacing-4);--spacing-panel-padding:var(--spacing-4);--spacing-panel-gap:var(--spacing-3);--spacing-badge-padding:var(--spacing-1) var(--spacing-3);--spacing-pill-padding:var(--spacing-2) var(--spacing-3);--radius-none:0;--radius-sm:.25rem;--radius-md:.375rem;--radius-lg:.5rem;--radius-xl:.75rem;--radius-2xl:1rem;--radius-3xl:1.5rem;--radius-full:9999px;--radius-card:var(--radius-lg);--radius-button:var(--radius-md);--radius-input:var(--radius-md);--radius-badge:var(--radius-sm);--radius-modal:var(--radius-xl);--shadow-xs:0 1px 2px 0 #0000000d;--shadow-sm:0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--shadow-xl:0 20px 25px -5px #0000001a, 0 8px 10px -6px #0000001a;--shadow-2xl:0 25px 50px -12px #00000040;--shadow-inner:inset 0 2px 4px 0 #0000000d;--shadow-card:var(--shadow-md);--shadow-button:var(--shadow-sm);--shadow-modal:var(--shadow-xl);--shadow-dropdown:var(--shadow-lg);--size-0:0;--size-px:.125rem;--size-1:.25rem;--size-2:.5rem;--size-3:.75rem;--size-4:1rem;--size-5:1.25rem;--size-6:1.5rem;--size-7:1.75rem;--size-8:2rem;--size-10:2.5rem;--size-12:3rem;--size-14:3.5rem;--size-16:4rem;--size-20:5rem;--size-24:6rem;--size-32:8rem;--size-40:10rem;--size-48:12rem;--size-56:14rem;--size-64:16rem;--size-72:18rem;--size-80:20rem;--size-96:24rem;--size-half:50%;--size-third:33.3333%;--size-two-thirds:66.6667%;--size-quarter:25%;--size-three-quarters:75%;--size-fifth:20%;--size-two-fifths:40%;--size-three-fifths:60%;--size-four-fifths:80%;--size-full:100%;--size-screen:100vw;--size-screen-h:100vh;--size-min:min-content;--size-max:max-content;--size-fit:fit-content;--width-sidebar:280px;--width-panel:320px;--width-modal-sm:400px;--width-modal-md:600px;--width-modal-lg:800px;--width-modal-xl:1000px;--width-container-sm:640px;--width-container-md:768px;--width-container-lg:1024px;--width-container-xl:1280px;--width-container-2xl:1536px;--width-card-sm:300px;--width-card-md:400px;--width-card-lg:500px;--height-header:64px;--height-footer:80px;--height-navbar:64px;--height-toolbar:48px;--height-input:40px;--height-input-sm:32px;--height-input-lg:48px;--height-button:40px;--height-button-sm:32px;--height-button-lg:48px;--height-icon:24px;--height-icon-sm:16px;--height-icon-lg:32px;--min-width-button:80px;--min-width-input:200px;--min-width-modal:300px;--max-width-xs:320px;--max-width-sm:384px;--max-width-md:448px;--max-width-lg:512px;--max-width-xl:576px;--max-width-2xl:672px;--max-width-3xl:768px;--max-width-4xl:896px;--max-width-5xl:1024px;--max-width-6xl:1152px;--max-width-7xl:1280px;--max-width-prose:65ch;--max-width-screen-sm:640px;--max-width-screen-md:768px;--max-width-screen-lg:1024px;--max-width-screen-xl:1280px;--max-width-screen-2xl:1536px;--inset-0:0;--inset-px:.125rem;--inset-1:.25rem;--inset-2:.5rem;--inset-3:.75rem;--inset-4:1rem;--inset-6:1.5rem;--inset-8:2rem;--inset-12:3rem;--inset-16:4rem;--inset-auto:auto;--inset-1\/2:50%;--inset-full:100%;--text-xs:.75rem;--text-xs-line:1rem;--text-sm:.875rem;--text-sm-line:1.25rem;--text-base:1rem;--text-base-line:1.5rem;--text-lg:1.125rem;--text-lg-line:1.75rem;--text-xl:1.25rem;--text-xl-line:1.75rem;--text-2xl:1.5rem;--text-2xl-line:2rem;--text-3xl:1.875rem;--text-3xl-line:2.25rem;--text-4xl:2.25rem;--text-4xl-line:2.5rem;--text-5xl:3rem;--text-5xl-line:1;--text-6xl:3.75rem;--text-6xl-line:1;--text-7xl:4.5rem;--text-7xl-line:1;--text-8xl:6rem;--text-8xl-line:1;--text-9xl:8rem;--text-9xl-line:1;--font-thin:100;--font-extralight:200;--font-light:300;--font-normal:400;--font-medium:500;--font-semibold:600;--font-bold:700;--font-extrabold:800;--font-black:900;--tracking-tighter:-.05em;--tracking-tight:-.025em;--tracking-normal:0em;--tracking-wide:.025em;--tracking-wider:.05em;--tracking-widest:.1em;--leading-none:1;--leading-tight:1.25;--leading-snug:1.375;--leading-normal:1.5;--leading-relaxed:1.625;--leading-loose:2;--table-cell-padding:var(--spacing-3) var(--spacing-4);--table-cell-padding-sm:var(--spacing-2) var(--spacing-3);--table-cell-padding-lg:var(--spacing-4) var(--spacing-6);--table-row-height:48px;--table-row-height-sm:40px;--table-row-height-lg:56px;--table-header-height:56px;--table-col-xs:60px;--table-col-sm:100px;--table-col-md:150px;--table-col-lg:200px;--table-col-xl:250px;--table-col-2xl:300px;--table-col-icon:48px;--table-col-checkbox:48px;--table-col-actions:120px}@media (width<=1024px){:root{--spacing-card-padding:var(--spacing-4);--spacing-card-body:var(--spacing-4);--spacing-section-padding:var(--spacing-5);--spacing-section-gap:var(--spacing-5);--spacing-container-padding:var(--spacing-3);--spacing-container-gap:var(--spacing-5);--spacing-header-padding:var(--spacing-3) var(--spacing-4);--spacing-footer-padding:var(--spacing-3) var(--spacing-3);--width-sidebar:260px;--width-panel:300px;--width-modal-md:560px;--width-modal-lg:720px;--height-header:56px;--height-navbar:56px;--height-toolbar:44px;--text-3xl:1.75rem;--text-4xl:2rem;--text-5xl:2.5rem;--text-6xl:3rem;--text-7xl:3.75rem;--table-row-height:44px;--table-header-height:52px}}@media (width<=768px){:root{--spacing-card-padding:var(--spacing-3);--spacing-card-header:var(--spacing-3) var(--spacing-3);--spacing-card-body:var(--spacing-3);--spacing-card-footer:var(--spacing-3) var(--spacing-3);--spacing-card-gap:var(--spacing-3);--spacing-widget-padding:var(--spacing-2);--spacing-widget-gap:var(--spacing-2);--spacing-widget-margin:var(--spacing-3) 0;--spacing-section-padding:var(--spacing-4);--spacing-section-gap:var(--spacing-4);--spacing-section-margin:var(--spacing-6) 0;--spacing-container-padding:var(--spacing-3);--spacing-container-gap:var(--spacing-4);--spacing-list-gap:var(--spacing-2);--spacing-list-item-padding:var(--spacing-3) 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var(--spacing-3);--radius-card:var(--radius-md);--radius-modal:var(--radius-lg);--shadow-card:var(--shadow-sm);--shadow-modal:var(--shadow-lg);--shadow-dropdown:var(--shadow-md);--width-sidebar:240px;--width-panel:280px;--width-modal-sm:340px;--width-modal-md:480px;--width-modal-lg:600px;--height-header:52px;--height-navbar:52px;--height-toolbar:40px;--height-input:36px;--height-input-sm:30px;--height-input-lg:44px;--height-button:36px;--height-button-sm:30px;--height-button-lg:44px;--text-2xl:1.375rem;--text-3xl:1.625rem;--text-4xl:1.875rem;--text-5xl:2.25rem;--text-6xl:2.75rem;--text-7xl:3.25rem;--text-8xl:4rem;--table-cell-padding:var(--spacing-2) var(--spacing-3);--table-row-height:40px;--table-row-height-sm:36px;--table-header-height:48px;--table-col-xs:50px;--table-col-sm:80px;--table-col-md:120px;--table-col-icon:40px;--table-col-checkbox:40px;--table-col-actions:100px}}@media (width<=480px){:root{--spacing-card-padding:var(--spacing-3);--spacing-card-header:var(--spacing-2) 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spin{to{transform:rotate(360deg)}}.animate-spin{animation:1s linear infinite spin}@keyframes pulse{0%,to{opacity:1}50%{opacity:.55}}.animate-pulse{animation:1.5s ease-in-out infinite pulse}.border-primary{border-color:rgb(var(--text-accent))}.lesson-present-skeleton-bar{background:rgb(var(--border-default));border-radius:var(--radius-full);width:6rem;height:.5rem}.btn-base{border-radius:var(--card-radius);cursor:pointer;border:1px solid rgb(var(--bg-primary));align-items:center;gap:.5rem;padding:.5rem .75rem;font-size:.875rem;font-weight:500;transition:all .2s;display:inline-flex}.btn-base:disabled{cursor:not-allowed}.btn-base:not(:disabled):hover{transform:translateY(-1px)}.btn-base:not(:disabled):active{transform:scale(.98)}.icon-btn{color:var(--text-muted);cursor:pointer;border-radius:.375rem;justify-content:center;align-items:center;padding:.375rem;transition:all .2s;display:flex;background:0 0!important;border:none!important}.icon-btn:hover{color:rgb(var(--text-main))}.icon-btn:active{transform:scale(.95)}.pill-badge{border-radius:var(--radius-full);border:1px solid var(--glass-stroke);background:rgb(var(--glass-bg));color:rgb(var(--text-muted));align-items:center;padding:.125rem .5rem;font-size:.65rem;font-weight:600;display:inline-flex}.card-pill{z-index:10;border:1px solid var(--glass-stroke);border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.05em;box-shadow:var(--shadow-sm);background:rgb(var(--glass-bg));color:rgb(var(--text-accent));padding:.25rem .75rem;font-size:.75rem;font-weight:700;position:absolute;top:-.75rem;left:1rem}.card.has-card-number{position:relative}.card.has-card-number .card-header{margin-top:.6rem}.card-number{border-radius:var(--radius-full);border:1px solid var(--glass-stroke);background:rgb(var(--glass-bg));color:rgb(var(--text-accent));font-family:var(--font-heading);letter-spacing:.08em;text-transform:uppercase;box-shadow:var(--shadow-sm);pointer-events:none;z-index:10;padding:.35rem .7rem;font-size:.8rem;font-weight:600;line-height:1;position:absolute;top:-.8rem;left:.6rem;transform:translate(-.2rem)}.gap-xs{gap:var(--spacing-xs)}.gap-sm{gap:var(--spacing-sm)}.gap-md{gap:var(--spacing-md)}.gap-lg{gap:var(--spacing-lg)}.p-card{padding:var(--card-padding)}.p-widget{padding:var(--widget-padding)}.interactive{cursor:pointer;transition:all .2s}.interactive:hover{background:var(--hover-bg)}.interactive:active{background:var(--active-bg);transform:scale(.98)}.text-main{color:rgb(var(--text-main))}.text-muted,.text-secondary{color:rgb(var(--text-muted))}.text-primary-color,.text-accent{color:rgb(var(--text-accent))}.surface-primary{background:rgb(var(--bg-primary))}.surface-secondary{background:rgb(var(--bg-secondary))}.section-timer-overlay{z-index:9998;background:#0000004d;transition:opacity .3s;position:fixed;inset:0}.section-timer-panel{background:var(--bg-primary);border-left:1px solid var(--border-color);z-index:9999;flex-direction:column;width:320px;max-width:90vw;display:flex;position:fixed;top:0;bottom:0;right:0;box-shadow:-8px 0 32px #00000026}.section-timer-panel-header{border-bottom:1px solid var(--border-color);background:var(--bg-secondary);align-items:center;gap:.5rem;padding:1rem 1.25rem;display:flex}.section-timer-title{color:var(--text-main);flex:1;font-size:1rem;font-weight:600}.section-timer-control{cursor:pointer;color:var(--text-muted);border:none;border-radius:6px;padding:.4rem;transition:all .2s;display:flex}.section-timer-control:hover{background:var(--hover-bg);color:var(--text-main)}.section-timer-control svg{width:18px;height:18px}.section-timer-list{flex-direction:column;flex:1;gap:.25rem;padding:.75rem;display:flex;overflow-y:auto}.section-timer-row{text-align:left;border:1px solid rgb(var(--bg-primary));cursor:pointer;width:100%;color:var(--text-secondary);border-radius:8px;justify-content:space-between;align-items:center;padding:.75rem .9rem;transition:all .2s;display:flex}.section-timer-row:hover{background:var(--hover-bg);border-color:var(--border-color);color:var(--text-main)}.section-timer-row.active{background:rgb(var(--bg-secondary));color:var(--text-accent);border-color:rgb(var(--border-default));font-weight:600}.section-timer-row-title{white-space:nowrap;text-overflow:ellipsis;flex:1;margin-right:.75rem;font-size:.85rem;overflow:hidden}.section-timer-status{text-transform:uppercase;letter-spacing:.05em;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:4px;padding:2px 6px;font-size:.65rem;font-weight:600}.status-complete{background:rgb(var(--bg-tertiary));color:var(--color-success);border-color:rgb(var(--color-success))}.card-has-actions{flex-direction:column;display:flex}.card-action-bar{border-top:1px solid var(--glass-stroke);background:rgb(var(--glass-bg));justify-content:flex-end;align-items:center;gap:1rem;padding:.75rem 1rem;display:flex}.card-action-btn{border:1px solid rgb(var(--bg-primary));cursor:pointer;border-radius:999px;align-items:center;gap:.4rem;padding:.4rem .9rem;font-size:.85rem;font-weight:500;transition:all .2s;display:inline-flex}.card-action-icon{width:16px;height:16px}.card-action-skip{color:var(--text-muted)}.card-action-skip:hover:not(:disabled){background:color-mix(in srgb, var(--text-muted) 10%);color:var(--text-secondary)}.card-action-finish{color:var(--text-accent);background:rgb(var(--btn-secondary-bg));border-color:rgb(var(--border-focus))}.card-action-finish:hover:not(:disabled){background:rgb(var(--btn-secondary-hover-bg));box-shadow:var(--shadow-sm);transform:translateY(-1px)}.collapsed .card-body{display:none}.status-skipped{background:var(--bg-secondary);color:var(--text-muted)}}.nav-item{align-items:center;gap:var(--spacing-3);padding:var(--spacing-3) var(--spacing-4);width:100%;font-family:var(--font-body);font-size:var(--text-base);color:rgb(var(--text-muted));background:rgb(var(--menu-item-bg));border-radius:var(--radius-xl);border:none;font-weight:500;text-decoration:none;transition:all .2s;display:flex;position:relative;overflow:hidden}.nav-item:hover{background:rgb(var(--menu-item-hover-bg));color:rgb(var(--text-main));transform:none}.nav-item:focus-visible{outline:2px solid rgb(var(--border-focus));outline-offset:2px}.nav-item.active,.nav-item.nav-active{background:rgb(var(--menu-item-active-bg));color:rgb(var(--text-main));font-weight:700}.nav-item.active:before,.nav-item.nav-active:before{content:"";width:var(--radius-xl);background:rgb(var(--border-focus));position:absolute;top:0;bottom:0;left:0}.nav-item i,.nav-item svg{color:rgb(var(--text-muted));text-align:center;width:1.5rem;font-size:1.25rem;transition:color .2s}.nav-section-label{margin:var(--spacing-8) 0 var(--spacing-2);padding:0 var(--spacing-2);text-transform:uppercase;letter-spacing:.05em;color:rgb(var(--text-muted));font-size:.75rem;font-weight:700}.nav-item.active,.nav-item.nav-active{font-weight:600;background:rgb(var(--btn-primary-bg))!important;color:#fff!important}.nav-item.active:before,.nav-item.nav-active:before{content:"";height:100%;width:var(--radius-xl);position:absolute;top:50%;left:0;transform:translateY(-50%);background:#ffffff80!important}.nav-item:hover i,.nav-item:hover svg,.nav-item.active i,.nav-item.active svg,.nav-item.nav-active i,.nav-item.nav-active svg{color:#fff!important}@keyframes tier-badge-gleam{0%{transform:translate(-100%)skew(-20deg)}to{transform:translate(300%)skew(-20deg)}}.tier-badge{text-transform:uppercase;letter-spacing:.05em;border-radius:4px;justify-content:center;align-items:center;height:16px;padding:0 6px;font-size:9px;font-weight:800;line-height:1;display:inline-flex;position:relative;overflow:hidden}.tier-free{color:#fff;background:linear-gradient(135deg,#e6cfa3 0%,#cd7f32 50%,#8b4513 100%)}.tier-outline-free{border:2px solid #cd7f32}.tier-plus{color:#7b5e00;text-shadow:0 1px #ffffff80;background:linear-gradient(135deg,#fffacd 0%,gold 50%,#daa520 100%);box-shadow:0 2px 4px #daa5204d}.tier-outline-plus{border:2px solid gold}.tier-pro{color:#005f80;text-shadow:0 1px #ffffff80;background:linear-gradient(135deg,#e0faff 0%,#b9f2ff 50%,#00bfff 100%) padding-box padding-box,linear-gradient(90deg,#ff0080,#ff8c00,gold,#0f0,#00bfff,#8a2be2,#ff0080) border-box;border:2px solid #0000;box-shadow:0 0 10px #b9f2ff80,0 0 20px #b9f2ff4d}.tier-outline-pro{background:linear-gradient(rgb(var(--bg-secondary)), rgb(var(--bg-secondary))) padding-box, linear-gradient(to right, #ff0080, #ff8c00, gold, #0f0, #00bfff, #8a2be2, #ff0080) border-box;border:2px solid #0000}.tier-gleam-pro:before{content:"";pointer-events:none;z-index:10;background:linear-gradient(90deg,#0000 0%,#fff9 50%,#0000 100%);width:100%;height:200%;animation:1.5s linear infinite tier-badge-gleam;position:absolute;top:-50%;left:-100%}@media (width<=640px){.btn-label{display:none}}