:root{--bg: #f3f6fa;--surface: #ffffff;--ink: #10202e;--ink-soft: #5a6b7f;--ink-faint: #8a99ab;--brand: #0d9488;--brand-deep: #0f766e;--brand-soft: #e0f4f2;--line: #e4eaf2;--danger: #dc2626;--danger-soft: #fdecec;--warn: #b45309;--warn-soft: #fef3c7;--shadow-sm: 0 1px 2px rgba(16, 32, 46, .06);--shadow-md: 0 8px 24px rgba(16, 32, 46, .08);--radius: 18px;font-family:system-ui,-apple-system,Segoe UI,Roboto,Noto Sans Thai,Helvetica Neue,sans-serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;color:var(--ink);background:var(--bg);line-height:1.5}button,input,textarea,select{font:inherit}h1,h2,h3,p{margin:0}button{cursor:pointer}.muted{color:var(--ink-soft);font-size:.9rem}.brand-mark{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#fff;font-weight:800;font-size:1.25rem;box-shadow:0 4px 10px #0d948859;flex-shrink:0}input,textarea,select{width:100%;background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:12px 14px;color:var(--ink);transition:border-color .15s,box-shadow .15s}textarea{min-height:84px;resize:vertical}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px #0d948826;background:#fff}label{display:grid;gap:8px;font-size:.88rem;font-weight:600;color:var(--ink-soft);margin:14px 0}label:first-of-type{margin-top:0}button{border:0;border-radius:12px;background:var(--brand);color:#fff;padding:12px 16px;font-weight:600;transition:transform .08s,box-shadow .15s,background .15s}button:active{transform:scale(.97)}button:focus-visible{outline:2px solid var(--brand-deep);outline-offset:2px}button.primary{background:linear-gradient(135deg,var(--brand),var(--brand-deep));box-shadow:0 6px 16px #0d94884d}button.quiet{background:#e9eef5;color:var(--ink)}button.danger{background:var(--danger-soft);color:var(--danger)}button.link{background:none;color:var(--brand-deep);padding:0;font-weight:700;text-decoration:underline}button.wide{width:100%}.actions{display:flex;gap:10px;align-items:center}.auth-page{min-height:100vh;min-height:100dvh;display:grid;place-content:center;padding:24px 16px;background:radial-gradient(60% 45% at 50% 0%,#d7f3ef 0%,transparent 70%),var(--bg)}.auth-card{width:min(400px,100%);background:var(--surface);border:1px solid var(--line);border-radius:26px;padding:30px 26px;box-shadow:var(--shadow-md)}.auth-card .brand-mark{margin-bottom:22px}.eyebrow{display:inline-block;font-size:.68rem;font-weight:800;letter-spacing:.16em;color:var(--brand);margin-bottom:8px}.auth-card h1{font-size:1.75rem;line-height:1.3;margin-bottom:8px}.auth-card .muted{margin-bottom:18px}.auth-card button{margin-top:6px}.auth-status{margin-top:14px;text-align:center;font-size:.88rem;color:var(--danger)}.app-shell{max-width:640px;margin:0 auto;padding:0 14px 110px}.app-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:12px 0;background:#f3f6fad9;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.brand{display:flex;align-items:center;gap:10px}.brand b{display:block;font-size:1.05rem}.brand small{display:block;font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint)}.user-pill{background:var(--brand-soft);color:var(--brand-deep);border-radius:999px;padding:6px 13px;font-size:.82rem;font-weight:600;max-width:40vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.app-nav{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;background:#ffffffeb;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:6px 10px calc(6px + env(safe-area-inset-bottom))}.app-nav button{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;background:none;color:var(--ink-faint);padding:6px 4px;font-size:.72rem;font-weight:600;border-radius:12px}.app-nav button span{font-size:1.25rem;line-height:1}.app-nav button.active{color:var(--brand-deep);background:var(--brand-soft)}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:14px;box-shadow:var(--shadow-sm)}.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}.card-head h1,.card-head h2{font-size:1.15rem}.goal-badge{background:var(--brand-soft);color:var(--brand-deep);border-radius:999px;padding:5px 11px;font-size:.78rem;font-weight:700;white-space:nowrap}.status-banner{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:12px;padding:10px 14px;margin-bottom:14px;font-size:.92rem;color:var(--ink-soft)}.notice{background:var(--warn-soft);color:var(--warn);border-radius:12px;padding:10px 14px;font-size:.88rem;margin-bottom:14px}.notice button.link{color:var(--warn)}.workspace-bar{display:flex;gap:8px;align-items:center;margin-bottom:14px}.workspace-bar select{flex:0 0 auto;width:auto;max-width:46%;padding:10px 12px}.workspace-bar input{flex:1;min-width:0;padding:10px 12px}.workspace-bar button{padding:10px 14px}.chips{display:flex;gap:8px;overflow-x:auto;padding:2px 2px 10px;-webkit-overflow-scrolling:touch}.chip{background:#eef2f7;color:var(--ink-soft);border-radius:999px;padding:8px 14px;font-size:.84rem;font-weight:600;white-space:nowrap;transition:background .15s,color .15s}.chip:hover{background:var(--brand-soft);color:var(--brand-deep)}.compose .actions>button{flex:1}.compose .actions{margin-top:4px}.challenge{display:flex;flex-direction:column;align-items:stretch}.thai-bubble{align-self:flex-start;background:var(--brand-soft);color:var(--brand-deep);border-radius:4px 18px 18px;padding:12px 16px;font-size:1.15rem;font-weight:600;line-height:1.5;margin-bottom:16px}.timer{text-align:center;font-size:2.4rem;font-weight:800;font-variant-numeric:tabular-nums;color:var(--brand);margin:4px 0 12px}.blanks{font-size:1.55rem;line-height:1.75;letter-spacing:.05em;overflow-wrap:anywhere;padding:18px 4px 6px;text-align:center}.answer{align-self:center;background:var(--brand-soft);color:var(--brand-deep);border-radius:12px;padding:10px 16px;font-size:1.1rem;font-weight:700;margin:8px 0 4px}.challenge-actions{display:flex;gap:10px;align-items:center;margin-top:18px}.challenge-actions>button:not(.mic){flex:1;padding:12px 8px}.mic{flex:0 0 auto;width:60px;height:60px;border-radius:50%;display:grid;place-items:center;font-size:1.5rem;background:linear-gradient(135deg,var(--brand),var(--brand-deep));box-shadow:0 8px 20px #0d948859}.mic.recording{background:linear-gradient(135deg,#ef4444,var(--danger));box-shadow:0 0 #dc262673;animation:pulse 1.4s infinite}@keyframes pulse{0%{box-shadow:0 0 #dc262673}70%{box-shadow:0 0 0 14px #dc262600}to{box-shadow:0 0 #dc262600}}.recording-hint{text-align:center;margin-top:12px;color:var(--danger);font-size:.85rem;font-weight:600}.history-item{display:grid;gap:3px;width:100%;text-align:left;background:#f8fafc;color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:8px}.history-item b{font-size:1rem}.history-item span{font-size:.85rem;color:var(--ink-soft)}.sentinel{height:1px}@media(min-width:720px){.app-shell{padding-bottom:40px}.app-nav{position:static;display:flex;gap:6px;background:#e9eef5;border:0;border-radius:999px;padding:4px;margin-bottom:18px}.app-nav button{flex-direction:row;padding:9px 16px;font-size:.85rem;border-radius:999px}.app-nav button span{font-size:.95rem}.app-nav button.active{background:#fff;box-shadow:var(--shadow-sm)}.workspace-bar input{max-width:240px}}@media(prefers-reduced-motion:reduce){.mic.recording{animation:none}button{transition:none}}