:root{--bg: #fafafa;--fg: #1a1a1a;--muted: #666;--border: #ddd;--primary: #2563eb;--primary-fg: white;--error-bg: #fee;--error-fg: #b00020;--info-bg: #eef5ff;--info-fg: #1d4ed8;--success-bg: #ecfdf5;--success-fg: #047857;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}body{margin:0;background:var(--bg);color:var(--fg)}main{max-width:720px;margin:0 auto;padding:2rem 1rem}h1{margin:0 0 .25rem;font-size:1.75rem}h2{margin:2rem 0 .75rem;font-size:1.15rem}form{display:flex;flex-direction:column;gap:.5rem}label{font-weight:500}input[type=text],textarea{font:inherit;padding:.5rem;border:1px solid var(--border);border-radius:6px;background:#fff}textarea{resize:vertical}button{align-self:flex-start;font:inherit;padding:.55rem 1rem;border:none;border-radius:6px;background:var(--primary);color:var(--primary-fg);cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}.banner{padding:.6rem .8rem;border-radius:6px;margin:.75rem 0}.banner--error{background:var(--error-bg);color:var(--error-fg)}.banner--info{background:var(--info-bg);color:var(--info-fg)}.banner--success{background:var(--success-bg);color:var(--success-fg)}.dashboard-header{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem}.dashboard-header p{margin:0;color:var(--muted)}.sheet-drive-links{margin:1rem 0;font-size:.9rem}.sheet-drive-links a{color:var(--primary)}.submissions-list{list-style:none;padding:0}.submission{border:1px solid var(--border);border-radius:8px;padding:.75rem 1rem;margin-bottom:.75rem;background:#fff}.submission header{display:flex;justify-content:space-between;font-size:.9rem}.submission time{color:var(--muted)}.submission p{margin:.5rem 0}.submissions-empty{color:var(--muted);font-style:italic}.app-loading{text-align:center;padding:4rem 1rem;color:var(--muted)}