:root {
    --bg: #0f1115;
    --card-bg: #171a21;
    --border: #262b36;
    --text: #e7e9ee;
    --text-muted: #8b93a3;
    --accent: #4f7cff;
    --green: #22c55e;
    --red: #ef4444;
    --amber: #f59e0b;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    border-bottom: 1px solid var(--border);
}
.topbar .logo { font-weight: 700; font-size: 1.2rem; color: var(--text); text-decoration: none; }
.topbar nav a { color: var(--text-muted); text-decoration: none; margin-left: 20px; font-size: 0.9rem; }
.topbar nav a:hover { color: var(--text); }
.topbar .username { color: var(--accent); margin-left: 20px; font-size: 0.9rem; }
.container { max-width: 1100px; margin: 0 auto; padding: 32px 20px; }
h1 { font-size: 1.6rem; margin-bottom: 20px; }
h2 { font-size: 1.1rem; margin-top: 0; }
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
}
.card-header-row { display: flex; justify-content: space-between; align-items: center; }
.summary-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-card { display: flex; flex-direction: column; gap: 6px; }
.stat-label { color: var(--text-muted); font-size: 0.85rem; }
.stat-value { font-size: 1.6rem; font-weight: 700; }
.positive { color: var(--green); }
.negative { color: var(--red); }
.data-table { width: 100%; border-collapse: collapse; margin-top: 12px; }
.data-table th, .data-table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
.data-table th { color: var(--text-muted); font-weight: 600; }
.muted { color: var(--text-muted); font-size: 0.8rem; }
.badge { background: #232838; color: var(--text-muted); padding: 3px 8px; border-radius: 6px; font-size: 0.75rem; }
.badge-ok { background: rgba(34,197,94,0.15); color: var(--green); }
.badge-warn { background: rgba(245,158,11,0.15); color: var(--amber); }
.badge-error { background: rgba(239,68,68,0.15); color: var(--red); }
.btn {
    background: #232838; color: var(--text); border: 1px solid var(--border);
    padding: 8px 16px; border-radius: 8px; cursor: pointer; font-size: 0.9rem; text-decoration: none; display: inline-block;
}
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-danger { background: rgba(239,68,68,0.15); border-color: var(--red); color: var(--red); }
.btn-sm { padding: 5px 10px; font-size: 0.8rem; }
form label { display: block; margin-bottom: 14px; font-size: 0.85rem; color: var(--text-muted); }
form input, form select {
    display: block; width: 100%; margin-top: 6px; padding: 10px; border-radius: 8px;
    border: 1px solid var(--border); background: #0f1115; color: var(--text); font-size: 0.95rem;
}
.small-input { width: 140px !important; display: inline-block !important; }
.inline-form { display: flex; gap: 8px; align-items: center; }
.auth-card { max-width: 420px; margin: 40px auto; }
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 0.9rem; }
.alert-error { background: rgba(239,68,68,0.12); color: var(--red); border: 1px solid rgba(239,68,68,0.3); }
.alert-success { background: rgba(34,197,94,0.12); color: var(--green); border: 1px solid rgba(34,197,94,0.3); }
.alert-warning { background: rgba(245,158,11,0.12); color: var(--amber); border: 1px solid rgba(245,158,11,0.3); }
.hint { color: var(--text-muted); font-size: 0.85rem; margin-top: -10px; }
.footer { text-align: center; color: var(--text-muted); font-size: 0.8rem; padding: 24px; }
.modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); align-items: center; justify-content: center; z-index: 50; }
.modal.open { display: flex; }
.modal-content { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 24px; width: 90%; max-width: 480px; max-height: 85vh; overflow-y: auto; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 10px; }
.coin-result { padding: 8px; cursor: pointer; border-bottom: 1px solid var(--border); font-size: 0.85rem; }
.coin-result:hover { background: #1e232e; }
code { background: #0f1115; padding: 2px 6px; border-radius: 4px; font-size: 0.85rem; }