:root{--primary: #6366f1;--bg: #f8fafc;--text: #1e293b;--muted: #64748b;--border: #e2e8f0;--card: #ffffff}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.loading{display:flex;justify-content:center;align-items:center;height:100vh;font-size:18px;color:var(--muted)}.login-page{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.login-card{background:var(--card);border-radius:16px;padding:32px;width:100%;max-width:400px;box-shadow:0 4px 12px #00000014;text-align:center}.login-card h1{color:var(--primary);margin-bottom:4px;font-size:28px}.login-subtitle{color:var(--muted);margin-bottom:24px;font-size:14px}.login-card input{width:100%;padding:12px;border:1px solid var(--border);border-radius:8px;font-size:15px;margin-bottom:12px}.login-card button{width:100%;padding:12px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer}.login-card button:disabled{opacity:.5}.app{max-width:500px;margin:0 auto;padding:16px}.app header{display:flex;align-items:center;gap:12px;padding-bottom:12px;border-bottom:1px solid var(--border);margin-bottom:16px;flex-wrap:wrap}.app header h1{font-size:22px;color:var(--primary)}.user-info{font-size:13px;color:var(--muted);flex:1}.app header button{background:#e2e8f0;border:none;border-radius:6px;padding:6px 14px;font-size:13px;cursor:pointer}.tabs{display:flex;gap:0;margin-bottom:16px}.tabs button{flex:1;padding:10px;border:none;background:var(--card);border-bottom:2px solid var(--border);font-size:14px;font-weight:600;color:var(--muted);cursor:pointer}.tabs button.active{border-bottom-color:var(--primary);color:var(--primary)}.error{background:#fef2f2;color:#dc2626;padding:10px;border-radius:8px;margin:8px 0;font-size:14px}.success{background:#dcfce7;color:#16a34a;padding:10px;border-radius:8px;margin:8px 0;font-size:14px}.muted{color:var(--muted);font-size:14px}.mood-checkin h2{margin-bottom:12px}.stoplight{display:flex;gap:8px;margin-bottom:12px}.mood-btn{flex:1;padding:14px 8px;border:none;border-radius:12px;color:#fff;font-weight:700;font-size:13px;cursor:pointer;text-shadow:0 1px 2px rgba(0,0,0,.3)}.mood-btn:disabled{opacity:.5}.mood-checkin textarea{width:100%;padding:10px;border:1px solid var(--border);border-radius:8px;font-size:14px;resize:none}.history{margin-top:16px}.history h3{font-size:16px;margin-bottom:8px}.history-item{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:14px}.mood-dot{width:14px;height:14px;border-radius:50%;flex-shrink:0}.kk-section h2{margin-bottom:12px}.kk-card{background:var(--card);border-radius:12px;padding:14px;margin-bottom:12px;box-shadow:0 1px 3px #0000000f}.kk-card h4{margin-bottom:8px}.kk-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;border-radius:8px;overflow:hidden;border:1px solid var(--border)}.kk-cell{padding:10px;display:flex;flex-direction:column;gap:2px;min-height:60px}.kk-cell small{font-size:10px;font-weight:700;text-transform:uppercase;opacity:.7}.kk-cell span{font-size:14px}