:root{color-scheme:light;--ink: #1a1a1a;--muted: #5f6368;--border: #d7d9dc;--accent: #2f5fb3;--bg-tint: #f4f6f8;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:#fff}main{max-width:480px;margin:0 auto;padding:24px 20px 48px}main.admin{max-width:720px}h1{font-size:1.4rem;margin-bottom:4px}h2{font-size:1.1rem}.checkin-context,.aggregate-note{color:var(--muted);font-size:.9rem}.mood-picker{display:flex;justify-content:space-between;gap:8px;margin:20px 0}.mood-option{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:12px 4px;border:1px solid var(--border);border-radius:10px;background:#fff;cursor:pointer;font-size:.75rem}.mood-option--selected{border-color:var(--accent);background:#eef2fb}.mood-emoji{font-size:1.6rem}.topic-tags{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 24px}.topic-tag{padding:8px 14px;border:1px solid var(--border);border-radius:999px;background:#fff;cursor:pointer;font-size:.85rem}.topic-tag--selected{border-color:var(--accent);background:#eef2fb}.submit-button,button{font-size:1rem;padding:10px 18px;border-radius:8px;border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}.safety-net{margin-top:32px;padding:14px 16px;border-radius:10px;background:var(--bg-tint);border:1px solid var(--border);font-size:.85rem;color:var(--muted)}.login form,.class-card,.admin-form{display:flex;flex-direction:column;gap:12px;margin:16px 0}.login label,.admin-form label{display:flex;flex-direction:column;gap:4px;font-size:.9rem}.login input,.admin-form input,.admin-form select{padding:8px 10px;border:1px solid var(--border);border-radius:6px;font-size:1rem}.dashboard-header{display:flex;justify-content:space-between;align-items:center}.class-card{border:1px solid var(--border);border-radius:10px;padding:16px;margin-bottom:16px}.checkin-url{font-family:monospace;font-size:.8rem;word-break:break-all}.error{color:#b3261e;font-size:.9rem}.mood-counts,.topic-counts{padding-left:18px;font-size:.9rem}.admin-section{border:1px solid var(--border);border-radius:10px;padding:16px 20px;margin-bottom:24px}.admin-list{padding-left:18px;font-size:.95rem}.admin-table{width:100%;border-collapse:collapse;font-size:.9rem;margin-top:12px}.admin-table th,.admin-table td{text-align:left;padding:6px 10px;border-bottom:1px solid var(--border)}.temp-password-reveal{margin:16px 0;padding:14px 16px;border-radius:10px;background:#fff7e0;border:1px solid #e0c068}.temp-password-reveal .checkin-url{font-size:1.1rem;font-weight:600;background:#fff;padding:8px 10px;border-radius:6px;display:inline-block}