:root{--md-sys-color-background:#fdfbff;--md-sys-color-surface:#fff;--md-sys-color-surface-variant:#f2eff7;--md-sys-color-primary:#5b21b6;--md-sys-color-primary-container:#eaddff;--md-sys-color-secondary:#7c3aed;--md-sys-color-on-surface:#1e1924;--md-sys-color-on-surface-variant:#49454f;--md-sys-color-outline:#cac4d0;--md-sys-color-outline-variant:#e7e0ec;--gradient-primary:linear-gradient(135deg,#5b21b6,#7c3aed 50%,#9333ea);--gradient-warm:linear-gradient(135deg,#7c3aed,#c026d3);--gradient-cool:linear-gradient(135deg,#4f46e5,#7c3aed);--gradient-surface:linear-gradient(180deg,hsla(0,0%,100%,0),hsla(0,0%,100%,.6));--shadow-1:0 1px 3px rgba(91,33,182,.08),0 1px 2px rgba(91,33,182,.04);--shadow-2:0 4px 8px rgba(91,33,182,.08),0 2px 4px rgba(91,33,182,.04);--shadow-3:0 8px 16px rgba(91,33,182,.1),0 4px 8px rgba(91,33,182,.06);--shadow-glow:0 0 20px rgba(124,58,237,.15);--radius-xs:8px;--radius-sm:12px;--radius-md:16px;--radius-lg:24px;--radius-xl:32px;--radius-full:9999px;--nav-height:68px;--safe-bottom:env(safe-area-inset-bottom)}*{box-sizing:border-box;-webkit-tap-highlight-color:rgba(0,0,0,0);margin:0;padding:0}#__next,body,html{height:100%;background:var(--md-sys-color-background);color:var(--md-sys-color-on-surface);font-family:Noto Sans Devanagari,Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:4px;height:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(91,33,182,.15);border-radius:10px}.surface,.surface-interactive{background:var(--md-sys-color-surface);border-radius:var(--radius-md);border:1px solid var(--md-sys-color-outline-variant);box-shadow:var(--shadow-1);transition:box-shadow .2s ease,transform .15s ease}.surface-interactive{cursor:pointer}.surface-interactive:active{transform:scale(.98);box-shadow:var(--shadow-2)}.gradient-card{position:relative;border-radius:var(--radius-lg);overflow:hidden;background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-3)}.gradient-card:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,hsla(0,0%,100%,.25),hsla(0,0%,100%,0) 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ease;min-height:48px}.btn-filled:active,.btn-tonal:active{transform:scale(.97);box-shadow:var(--shadow-1)}.btn-tonal{background:var(--md-sys-color-primary-container);box-shadow:none}.btn-outlined,.btn-tonal{color:var(--md-sys-color-primary)}.btn-outlined{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:var(--radius-full);border:1.5px solid var(--md-sys-color-outline);background:transparent;font-family:inherit;font-weight:700;font-size:.9rem;cursor:pointer;transition:all .2s ease}.btn-outlined:active{background:rgba(91,33,182,.04);transform:scale(.97)}.icon-btn-md3{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;border:none;background:var(--md-sys-color-surface-variant);color:var(--md-sys-color-on-surface-variant);cursor:pointer;transition:all .15s ease}.icon-btn-md3:active{transform:scale(.92);background:var(--md-sys-color-primary-container);color:var(--md-sys-color-primary)}.icon-btn-md3 svg{width:20px;height:20px}.md-input{width:100%;padding:14px 16px;border-radius:var(--radius-sm);border:1.5px solid var(--md-sys-color-outline);background:var(--md-sys-color-surface);color:var(--md-sys-color-on-surface);font-family:inherit;font-size:1rem;outline:none;transition:all .2s ease}.md-input:focus{border-color:var(--md-sys-color-primary);box-shadow:0 0 0 4px rgba(91,33,182,.08)}.app-shell{min-height:100vh;max-width:560px;margin:0 auto;padding-bottom:calc(var(--nav-height) + var(--safe-bottom) + 16px);position:relative}.page-view{padding:16px}.md-nav{position:fixed;left:50%;bottom:calc(12px + var(--safe-bottom));transform:translateX(-50%);gap:4px;padding:6px;background:var(--md-sys-color-surface);border:1px solid var(--md-sys-color-outline-variant);box-shadow:var(--shadow-3),0 0 0 1px hsla(0,0%,100%,.5) inset;z-index:50}.md-nav,.md-nav-item{display:flex;align-items:center;border-radius:var(--radius-full)}.md-nav-item{position:relative;justify-content:center;gap:6px;min-width:56px;height:52px;padding:0 14px;border:none;background:none;color:var(--md-sys-color-on-surface-variant);font-family:inherit;font-size:.75rem;font-weight:700;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1)}.md-nav-item svg{width:22px;height:22px;transition:transform .3s ease}.md-nav-item:hover{background:rgba(91,33,182,.04)}.md-nav-item.active{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-2)}.md-nav-item.active svg{transform:scale(1.1)}.h-scroll{display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:4px 4px 12px;margin:0 -4px}.h-scroll::-webkit-scrollbar{display:none}.h-scroll-item{scroll-snap-align:start;flex-shrink:0}.card-hero{width:280px;height:160px;padding:20px;display:flex;flex-direction:column;justify-content:flex-end}.card-rec{width:200px;padding:16px}.card-chapter{width:160px;padding:14px}.v-list{display:flex;flex-direction:column;gap:10px}.list-tile{display:flex;align-items:center;gap:14px;padding:16px;border-radius:var(--radius-md);background:var(--md-sys-color-surface);border:1px solid var(--md-sys-color-outline-variant);box-shadow:var(--shadow-1);cursor:pointer;transition:all .15s ease;text-align:left;width:100%;font-family:inherit;color:inherit}.list-tile:active{transform:scale(.987);box-shadow:var(--shadow-2)}.list-tile-leading{width:48px;height:48px;border-radius:var(--radius-sm);background:var(--md-sys-color-primary-container);color:var(--md-sys-color-primary);display:grid;place-items:center;font-size:1.25rem;font-weight:800;flex-shrink:0}.list-tile-content{flex:1 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24px;transform:translateY(calc(100% + 20px));transition:transform .4s cubic-bezier(.16,1,.3,1)}.open .md-sheet-panel{transform:translateY(0)}.sheet-drag-handle{width:40px;height:4px;border-radius:2px;background:var(--md-sys-color-outline);margin:8px auto 12px}body.md-sheet-open{overflow:hidden}.md-snack{position:fixed;left:50%;bottom:calc(var(--nav-height) + var(--safe-bottom) + 16px);transform:translate(-50%,200%);z-index:200;padding:12px 24px;border-radius:var(--radius-full);background:var(--md-sys-color-on-surface);color:var(--md-sys-color-surface);font-weight:700;font-size:.9rem;white-space:nowrap;transition:transform .35s cubic-bezier(.16,1,.3,1);box-shadow:var(--shadow-3)}.md-snack.show{transform:translate(-50%)}.admin-layout{max-width:680px;padding:16px 16px calc(40px + var(--safe-bottom))}.video-player video{border-radius:var(--radius-md)}.note-reader h1,.note-reader h2,.note-reader h3{color:var(--md-sys-color-primary);margin:16px 0 8px}.note-reader ul{padding-left:24px;margin-bottom:12px}.quiz-box{padding:8px 0;grid-gap:12px;gap:12px}.q-opt{gap:12px;padding:14px 16px;background:var(--md-sys-color-surface-variant);border:2px solid transparent;color:var(--md-sys-color-on-surface);font-size:1rem;transition:all .12s ease}.q-opt:active:not(:disabled){transform:scale(.99)}.q-opt.active{border-color:var(--md-sys-color-primary);background:rgba(91,33,182,.06)}.q-opt.correct{background:rgba(34,197,94,.1)}.q-opt.wrong{background:rgba(239,68,68,.1)}.q-opt.disabled{opacity:.5}.quiz-end{padding:40px 20px}.quiz-end h3{font-size:1.5rem;color:var(--md-sys-color-primary);margin-bottom:8px}.empty-state{text-align:center;padding:40px 20px;opacity:.6}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton{background:linear-gradient(90deg,rgba(0,0,0,.03) 25%,rgba(0,0,0,.06) 50%,rgba(0,0,0,.03) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-sm)}.quiz-box{display:grid;grid-gap:14px;gap:14px}.quiz-top{font-size:.88rem;opacity:.7;font-weight:600}.quiz-q{margin:0;font-size:1.08rem;line-height:1.5;font-weight:700}.quiz-options{display:grid;grid-gap:10px;gap:10px}.q-opt{display:flex;align-items:center;gap:10px;width:100%;text-align:left;padding:13px 14px;border-radius:var(--radius-sm);background:hsla(0,0%,100%,.5);border:1.5px solid var(--glass-border);color:var(--text);font-family:inherit;font-size:.98rem;cursor:pointer;transition:transform .12s ease,background .2s ease,border-color .2s ease;line-height:1.4}.q-opt:active:not(:disabled){transform:scale(.985)}.q-opt.active{border-color:var(--primary-light);background:rgba(124,58,237,.08)}.q-opt.correct{background:rgba(34,197,94,.12);border-color:#22c55e}.q-opt.wrong{background:rgba(239,68,68,.12);border-color:#ef4444}.q-opt.disabled{opacity:.55;cursor:default}.opt-letter{font-weight:800;color:var(--primary-light);min-width:22px;text-align:center}.quiz-foot{display:grid;grid-gap:10px;gap:10px;margin-top:6px}.c-text{color:#15803d}.c-text,.w-text{font-weight:700;margin:0}.w-text{color:#b91c1c}.explain{opacity:.85;margin:0;font-size:.95rem;line-height:1.5;padding:10px 14px;border-radius:var(--radius-sm);background:rgba(91,33,182,.04);border-left:3px solid var(--primary-light)}.quiz-end{text-align:center;display:grid;grid-gap:16px;gap:16px;padding:30px 14px}.quiz-end h3{font-size:1.4rem;color:var(--primary)}.quiz-end .score-display{font-size:1.15rem;opacity:.9}.quiz-end .score-display strong{color:var(--primary);font-size:1.5rem}.video-player video{width:100%;border-radius:18px;background:#000;display:block;max-height:55vh}.note-reader{line-height:1.75;font-size:.98rem}.note-reader h1,.note-reader h2,.note-reader h3,.note-reader h4{color:var(--primary);margin:16px 0 8px}.note-reader p{margin:0 0 12px}.note-reader ol,.note-reader ul{padding-left:22px;margin:0 0 12px}.note-reader img{max-width:100%;border-radius:var(--radius-sm)}iframe[title=interactive]{width:100%;height:55vh;border:none;border-radius:18px;background:#fff}.gate-card{max-width:420px;width:100%}.admin-layout{padding:16px 16px calc(40px + env(safe-area-inset-bottom));max-width:760px;margin:0 auto;min-height:100vh}.admin-tabs{display:flex;gap:10px;margin-bottom:18px;position:-webkit-sticky;position:sticky;top:env(safe-area-inset-top);z-index:10;padding:4px}.admin-tabs button{flex:1 1;padding:12px;border-radius:var(--radius-sm);border:1px solid var(--glass-border);background:hsla(0,0%,100%,.45);color:var(--text);font-family:inherit;font-weight:700;font-size:.95rem;cursor:pointer;transition:background .2s ease}.admin-tabs button:active{transform:scale(.97)}.admin-tabs button.active{background:linear-gradient(135deg,var(--primary) 0,var(--primary-light) 100%);color:#fff;border-color:transparent}.admin-section{display:grid;grid-gap:18px;gap:18px}.admin-form,.admin-toolbar{padding:20px;display:grid;grid-gap:12px;gap:12px}.admin-form label,.admin-toolbar label{font-size:.9rem;font-weight:600;opacity:.85;margin-bottom:-4px;display:block}.admin-form small,.admin-toolbar small{margin-top:-6px}.admin-list{display:grid;grid-gap:10px;gap:10px}.question-card{padding:16px!important;display:grid!important;grid-gap:12px!important;gap:12px!important}.options{display:grid;grid-gap:10px;gap:10px}.chapter-row{transition:transform .15s ease,background .2s ease}.chapter-row:active{transform:scale(.985);background:hsla(0,0%,100%,.55)}.content-row{transition:transform .12s ease,background .2s ease}.content-row:active{transform:scale(.985);background:hsla(0,0%,100%,.45)}.row-icon-box{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:rgba(91,33,182,.08);flex-shrink:0}.tile-row{scrollbar-width:none}.tile-row::-webkit-scrollbar{display:none}.tile{min-width:140px;cursor:pointer;transition:transform .15s ease}.tile:active{transform:scale(.96)}@media(min-width:768px){.page-view{padding-left:24px;padding-right:24px}}