:root{--bg: #f6f7f9;--surface: #ffffff;--text: #1c1d21;--muted: #6b7280;--border: #e5e7eb;--primary: #4f46e5;--primary-dark: #4338ca;--danger: #dc2626;--radius: 12px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.55}.app{max-width:820px;margin:0 auto;padding:0 16px 64px}.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 0;position:sticky;top:0;background:var(--bg);z-index:10}.brand{border:none;background:none;font-size:1.15rem;font-weight:700;cursor:pointer;color:var(--text)}.content{margin-top:8px}.btn{border:1px solid var(--border);background:var(--surface);color:var(--text);padding:8px 14px;border-radius:999px;font-size:.92rem;cursor:pointer;transition:background .15s,border-color .15s}.btn:hover{border-color:#cbd0d8}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}.btn-danger{color:var(--danger);border-color:#f0c9c9}.btn:disabled{opacity:.6;cursor:default}.search{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius);font-size:1rem;margin-bottom:16px;background:var(--surface)}.cards{list-style:none;padding:0;margin:0;display:grid;gap:12px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;cursor:pointer;transition:box-shadow .15s,transform .05s}.card:hover{box-shadow:0 4px 16px #0000000f}.card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.card-title{margin:0;font-size:1.05rem}.badge{font-size:.72rem;font-weight:600;padding:2px 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