:root{--brand:#4f46e5;--bg:#fff;--bg-soft:#f8fafc;--bg-card:#fff;--text:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--border:#e2e8f0;--error:#dc2626;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;font:18px/1.5 system-ui,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0}.page{max-width:480px;margin:0 auto;padding:32px 20px 64px}h1{margin:0 0 12px;font-size:26px;font-weight:700}.muted{color:var(--text-secondary)}.error-text{color:var(--error);font-size:15px}.pin-form{text-align:center;flex-direction:column;align-items:center;margin-top:15vh;display:flex}.pin-input{text-align:center;letter-spacing:10px;border:1px solid var(--border);border-radius:10px;width:100%;max-width:220px;margin:20px 0;padding:14px;font-size:32px}.button{background:var(--brand);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:14px 28px;font-size:16px;font-weight:600}.button:disabled{opacity:.6;cursor:default}.question-list{margin:0;padding:0;list-style:none}.question-row{background:var(--bg-card);border:1px solid var(--border);color:inherit;border-radius:10px;margin-bottom:10px;padding:14px 16px;text-decoration:none;display:block}.question-date{color:var(--text-muted);margin-bottom:4px;font-size:13px;display:block}.new-badge{background:var(--brand);color:#fff;border-radius:4px;margin-left:8px;padding:1px 6px;font-size:11px;font-weight:700;display:inline-block}.question-preview{text-overflow:ellipsis;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:15px;display:-webkit-box;overflow:hidden}.back-link{color:var(--brand);margin-bottom:16px;font-weight:600;text-decoration:none;display:inline-block}.question-photo{background:var(--bg-soft);border-radius:10px;width:100%;margin-bottom:12px}.question-meta{color:var(--text-secondary);margin-bottom:20px;font-size:14px}.explanation-card{background:var(--bg-card);border:1px solid var(--border);white-space:pre-wrap;border-radius:10px;padding:20px;font-size:16px;line-height:1.6}@media (prefers-color-scheme:dark){:root{--bg:#0f172a;--bg-soft:#1e293b;--bg-card:#1e293b;--text:#f1f5f9;--text-secondary:#cbd5e1;--text-muted:#64748b;--border:#334155;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}