:root{--bg: #fbfaf3;--bg-soft: #f4f1e3;--card: #ffffff;--card-2: #f0f7ee;--text: #1a2e22;--text-soft: #2f4a3c;--muted: #6a7d72;--te-text: #34403a;--accent: #16a34a;--accent-deep: #15803d;--accent-2: #0d9488;--highlight: #f59e0b;--warning: #d97706;--danger: #dc2626;--border: #e7ecdf;--border-strong: #d6dec8;--radius: 16px;--radius-sm: 10px;--shadow: 0 6px 24px rgba(22, 163, 74, .07), 0 1px 3px rgba(26, 46, 34, .04);--shadow-lift: 0 14px 40px rgba(22, 163, 74, .14);font-family:system-ui,-apple-system,SF Pro Text,Noto Sans Telugu,Inter,Roboto,sans-serif;font-size:18px;line-height:1.5}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:radial-gradient(1200px 600px at 0% -10%,#e6f5e6 0%,transparent 60%),radial-gradient(900px 500px at 100% 0%,#fef3c7 0%,transparent 55%),var(--bg);background-attachment:fixed;color:var(--text);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overscroll-behavior-y:contain;padding-bottom:env(safe-area-inset-bottom);padding-top:env(safe-area-inset-top)}button{font:inherit;cursor:pointer}.app{max-width:560px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column}.topbar{position:sticky;top:env(safe-area-inset-top);z-index:5;background:#fbfaf3eb;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--border)}.topbar .title{font-weight:700;font-size:17px;letter-spacing:.2px;color:var(--text)}.topbar .title small{display:block;color:var(--muted);font-weight:500;font-size:11px;margin-top:2px}.role-switch{display:flex;gap:2px;background:#fff;border-radius:999px;padding:3px;border:1px solid var(--border);box-shadow:var(--shadow)}.role-switch button{background:transparent;border:0;color:var(--muted);font-size:12px;font-weight:600;padding:7px 12px;border-radius:999px;transition:all .18s ease}.role-switch button.active{background:linear-gradient(135deg,var(--accent),#4ade80);color:#fff;box-shadow:0 2px 8px #16a34a4d}main.content{flex:1;padding:16px 14px 88px}h1,h2,h3{margin:0 0 8px;color:var(--text);letter-spacing:-.2px;line-height:1.25}h1{font-size:28px;font-weight:700}h2{font-size:22px;font-weight:700}h3{font-size:18px;font-weight:700}.muted{color:var(--muted)}.center{text-align:center}.row{display:flex;gap:10px;align-items:center}.col{display:flex;flex-direction:column;gap:12px}.spaced{display:flex;justify-content:space-between;align-items:center}.gap-sm{gap:6px}.gap-lg{gap:18px}.mt-md{margin-top:14px}.mt-lg{margin-top:22px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.card+.card{margin-top:12px}.card.hero{background:linear-gradient(135deg,#e6f5e6,#fef3c7);border-color:#d6e9c8}.card.soft{background:var(--card-2)}.badge{display:inline-block;padding:3px 9px;border-radius:999px;background:#e6f5e6;color:var(--accent-deep);font-size:11px;font-weight:700;letter-spacing:.3px}.badge.green{background:#d8f6e9;color:#047857}.badge.warn{background:#fdebd0;color:#b45309}.badge.danger{background:#fde0e0;color:#b91c1c}.badge.gold{background:#fff4d4;color:#92400e}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:14px 18px;border-radius:12px;border:1px solid var(--border-strong);background:#fff;color:var(--text);font-weight:600;font-size:16px;min-height:48px;transition:transform .06s ease,background .15s ease,border-color .15s ease;box-shadow:0 1px #4a35500a}.btn:hover{background:#fffaf0}.btn:active{transform:scale(.97)}.btn.primary{background:linear-gradient(135deg,var(--accent),#4ade80);color:#fff;border-color:transparent;box-shadow:0 6px 16px #16a34a40}.btn.primary:hover{filter:brightness(1.04)}.btn.success{background:linear-gradient(135deg,var(--accent-2),#34d399);color:#fff;border-color:transparent;box-shadow:0 6px 16px #10b98140}.btn.ghost{background:transparent;border-color:transparent;color:var(--accent-deep)}.btn.ghost:hover{background:#e6f5e6}.btn.tiny{padding:6px 12px;min-height:32px;font-size:13px}.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}.input{display:block;width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--border-strong);background:#fff;color:var(--text);font:inherit;min-height:44px;transition:border-color .15s,box-shadow .15s}.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #16a34a2e}.textarea{min-height:90px;resize:vertical;line-height:1.45}.stage-card{display:grid;grid-template-columns:40px 1fr auto;gap:14px;align-items:center;padding:16px;border-radius:16px;background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow);text-align:left;transition:transform .08s,box-shadow .15s}.stage-card:hover{box-shadow:var(--shadow-lift)}.stage-card:active{transform:scale(.99)}.stage-card .num{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#4ade80);color:#fff;display:grid;place-items:center;font-weight:700;font-size:15px;box-shadow:0 4px 12px #16a34a40}.stage-card .meta strong{color:var(--text)}.stage-card .meta .te{color:var(--te-text);font-size:13px}.stage-card 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14px;font-weight:600;min-height:44px;display:inline-flex;align-items:center;color:var(--text);transition:all .12s ease;cursor:pointer}.chip:hover{border-color:var(--accent);background:#f5fdf5}.chip.placed{background:linear-gradient(135deg,var(--accent),#4ade80);color:#fff;border-color:transparent;box-shadow:0 4px 12px #16a34a40}.chip.placed:hover{filter:brightness(1.05)}.chip.disabled{opacity:.4;pointer-events:none}.te{font-family:Noto Sans Telugu,system-ui,sans-serif;color:var(--te-text);font-size:16px;line-height:1.55}.tutor-line{background:#ebf5e6;color:var(--text);padding:12px 14px;border-radius:14px 14px 14px 4px;align-self:flex-start;max-width:88%}.learner-line{background:linear-gradient(135deg,var(--accent),#4ade80);color:#fff;padding:12px 14px;border-radius:14px 14px 4px;align-self:flex-end;max-width:88%;box-shadow:0 4px 12px #16a34a38}.chat{display:flex;flex-direction:column;gap:10px;max-height:52vh;overflow-y:auto;padding-right:4px}.offline-banner{background:#fdebd0;color:var(--warning);padding:9px 14px;font-size:13px;text-align:center;border-bottom:1px solid #f5d486;font-weight:600}.error{color:var(--danger);background:#fde0e0;padding:10px 14px;border-radius:10px;font-size:13px;border:1px solid #f7baba}.tutor-note{background:linear-gradient(135deg,#e6f5e6,#d4f1de);border:1.5px solid #c8e5cc;padding:14px 16px;border-radius:16px}.heatmap{display:grid;grid-template-columns:repeat(15,1fr);gap:4px}.heatmap span{display:block;height:14px;background:#f0e6d2;border-radius:4px}.heatmap span[data-level="1"]{background:#b9eccc}.heatmap span[data-level="2"]{background:#6bd6a3}.heatmap span[data-level="3"]{background:#34c879}.heatmap span[data-level="4"]{background:#10b981}.mic-btn{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#4ade80);color:#fff;border:0;font-size:24px;display:grid;place-items:center;box-shadow:0 6px 18px #16a34a52;transition:transform .08s}.mic-btn:active{transform:scale(.94)}.mic-btn.listening{background:linear-gradient(135deg,var(--danger),#f87171);animation:pulse 1.2s infinite}@keyframes pulse{0%{box-shadow:0 0 #dc262680}to{box-shadow:0 0 0 18px #dc262600}}.tab-rail{display:flex;gap:8px;overflow-x:auto;padding:4px 2px}.tab-rail::-webkit-scrollbar{display:none}.tab-rail button{background:#fff;border:1px solid var(--border-strong);color:var(--text);padding:8px 14px;border-radius:999px;white-space:nowrap;font-weight:600;font-size:13px;transition:all .14s}.tab-rail button.active{background:linear-gradient(135deg,var(--accent),#4ade80);color:#fff;border-color:transparent;box-shadow:0 4px 10px #16a34a38}.divider{border-top:1px solid var(--border);margin:12px 0}.today-card{background:linear-gradient(135deg,#e6f5e6,#fef3c7);border:1.5px solid #d4e6c8;border-radius:18px;padding:18px;box-shadow:var(--shadow-lift)}.today-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:10px}.today-stats .pill{background:#fffc;border-radius:12px;padding:10px;text-align:center;border:1px solid rgba(212,230,200,.7)}.today-stats .pill .n{font-weight:700;font-size:18px;color:var(--accent-deep)}.today-stats .pill .l{font-size:11px;color:var(--muted)}.kbd{display:inline-block;padding:2px 6px;border:1px solid var(--border-strong);border-radius:6px;background:#fff;font-family:ui-monospace,SFMono-Regular,monospace;font-size:11px;color:var(--muted)}@media (max-width: 380px){.topbar{padding:10px}.topbar .title{font-size:15px}main.content{padding:12px 10px 88px}}.te-inline{display:block;font-family:Noto Sans Telugu,system-ui,sans-serif;color:var(--te-text);font-size:14px;line-height:1.4;margin-top:2px;opacity:.92}.chapter-progress{display:flex;gap:6px;justify-content:center;margin:8px 0}.chapter-progress span{width:24px;height:4px;border-radius:999px;background:var(--border-strong);transition:background .2s}.chapter-progress span.done{background:var(--accent-2)}.chapter-progress span.active{background:var(--accent)}.nav-bar{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}.nav-bar .btn{width:100%}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeUp .25s ease-out}ul,ol{color:var(--text)}