:root{color-scheme:dark;--page-bg: #160a2f;--page-bg-soft: #241047;--card-bg: #2d1858;--card-bg-secondary: #3a226b;--card-bg-tertiary: #432a7a;--text: #fbf7ff;--muted: rgba(255, 255, 255, .72);--accent-purple: #8f63ff;--accent-purple-strong: #6f3df1;--accent-yellow: #ffd166;--success-green: #48e08b;--warning-amber: #ffb84d;--error-red: #ff5f73;--timeout-neutral: #c9c4d8;--border: rgba(255, 255, 255, .14);--radius: 20px;--radius-sm: 14px;--space: 16px;--shadow: 0 24px 70px rgba(0, 0, 0, .34);--button-gradient: linear-gradient(135deg, #9b6dff, #6f3df1);--focus-ring: #ffffff}:root[data-theme=light]{color-scheme:dark;--page-bg: #211044;--page-bg-soft: #321866;--card-bg: #3b2170;--card-bg-secondary: #4a2c82;--card-bg-tertiary: #563695;--text: #fffaff;--muted: rgba(255, 255, 255, .76);--accent-purple: #b59aff;--accent-purple-strong: #8f63ff;--button-gradient: linear-gradient(135deg, #b28cff, #8157ff);--shadow: 0 18px 52px rgba(32, 12, 68, .34)}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:linear-gradient(#0c051cad,#0c051cd1),url(/bg-mob.webp) center / cover fixed no-repeat,radial-gradient(circle at top,rgba(143,99,255,.28),transparent 34rem),linear-gradient(180deg,var(--page-bg-soft),var(--page-bg));color:var(--text);transition:background .25s ease,color .25s ease}button,input,select{font:inherit}button{cursor:pointer}button:disabled,input:disabled{cursor:not-allowed}button:focus-visible,input:focus-visible{outline:3px solid var(--focus-ring);outline-offset:4px}a:focus-visible,select:focus-visible{outline:3px solid var(--focus-ring);outline-offset:3px}.app-shell{width:min(100%,480px);min-height:100vh;min-height:100dvh;margin:0 auto;padding:18px 14px calc(32px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:var(--space);animation:screenIn .28s ease both}.card,.hero-card{width:100%;background:var(--card-bg);border:1px 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h1{font-size:clamp(2.7rem,14vw,4rem)}.challenge-date{margin:-6px 0 0;color:var(--muted);font-weight:800}.daily-meta{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;color:var(--muted);font-size:.82rem;font-weight:800}.next-challenge{display:grid;gap:4px;padding:14px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--card-bg-secondary)}.next-challenge span{color:var(--muted);font-size:.72rem;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.next-challenge strong{font-size:1.8rem;font-variant-numeric:tabular-nums;letter-spacing:.05em}.practice-section,.practice-list{display:grid;gap:14px}.practice-section:focus{outline:none}.practice-section:focus-visible{outline:3px solid var(--focus-ring);outline-offset:6px;border-radius:var(--radius)}.practice-card{display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px}.practice-card .secondary-button{width:auto;min-width:104px}.practice-card h3{margin:5px 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var(--border);border-radius:12px;background:#fff;color:#202124;font-weight:700;cursor:pointer}.google-sign-in-button:disabled{opacity:.65;cursor:wait}.auth-divider{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:.72rem;text-transform:uppercase}.auth-divider:before,.auth-divider:after{content:"";height:1px;flex:1;background:var(--border)}.auth-return-status{position:fixed;z-index:1000;left:50%;top:14px;transform:translate(-50%);width:min(calc(100% - 28px),560px);padding:12px 16px;border:1px solid var(--border);border-radius:12px;background:var(--panel);box-shadow:0 8px 28px #0000004d;text-align:center}.auth-return-error{display:flex;align-items:center;justify-content:space-between;gap:12px;border-color:var(--danger)}.auth-return-error button{border:0;background:transparent;color:inherit;text-decoration:underline;cursor:pointer}@keyframes 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