:root {
  --bg: #0F1420;
  --surface: #171D2B;
  --surface-2: #1E2536;
  --border: #2A3245;
  --ink: #E6E9F0;
  --ink-soft: #9AA4B8;
  --accent: #5B8DEF;
  --accent-ink: #0B1220;
  --danger: #E5484D;
  --ok: #3FB27F;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); font-family: -apple-system, "Segoe UI", Roboto, sans-serif; font-size: 15px; }
a { color: var(--accent); text-decoration: none; }

.shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }

.sidebar { background: var(--surface); border-right: 1px solid var(--border); padding: 20px 0; display: flex; flex-direction: column; }
.sidebar .brand { font-weight: 700; font-size: 16px; padding: 0 20px 20px; }
.sidebar nav { display: flex; flex-direction: column; }
.sidebar nav a { padding: 10px 20px; color: var(--ink-soft); font-size: 14px; }
.sidebar nav a:hover { background: var(--surface-2); color: var(--ink); }
.sidebar nav a.active { background: var(--surface-2); color: var(--ink); border-left: 3px solid var(--accent); }

.main { display: flex; flex-direction: column; min-width: 0; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 0 24px; height: 56px; border-bottom: 1px solid var(--border); }
.topbar-title { font-weight: 600; }
.topbar-account { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--ink-soft); }

.content { padding: 24px; max-width: 1200px; width: 100%; }
.content h1 { margin: 0 0 20px; font-size: 22px; }

.stat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-bottom: 24px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 16px; display: flex; flex-direction: column; gap: 4px; }
.stat-value { font-size: 26px; font-weight: 700; }
.stat-label { font-size: 12px; color: var(--ink-soft); }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 20px; margin-bottom: 16px; }
.panel h2 { margin: 0 0 12px; font-size: 15px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.03em; }
.empty-state p { margin: 0 0 6px; }
.hint { color: var(--ink-soft); font-size: 13px; margin: 0; }

.detail-list { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
.detail-list dt { color: var(--ink-soft); }
.detail-list dd { margin: 0; }

.table-scroll { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.data-table th, .data-table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.data-table th { color: var(--ink-soft); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 14px; font-size: 14px; }
.flash-error { background: rgba(229,72,77,0.15); color: #FF8A8E; border: 1px solid rgba(229,72,77,0.4); }

.btn-secondary, button[type=submit], .login-card button {
  padding: 9px 16px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface-2);
  color: var(--ink); font-size: 14px; cursor: pointer;
}
.login-card button, .content button[type=submit] { background: var(--accent); color: var(--accent-ink); border: none; font-weight: 600; }
.inline-form { display: inline; }

.content-plain { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-screen { width: 100%; max-width: 360px; padding: 20px; }
.login-card { display: flex; flex-direction: column; gap: 10px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 28px; }
.login-card h1 { margin: 0; font-size: 20px; }
.login-card .subtitle { margin: 0 0 10px; color: var(--ink-soft); font-size: 13px; }
.login-card label { font-size: 13px; color: var(--ink-soft); }
.login-card input { padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); color: var(--ink); font-size: 14px; }
.login-card button { margin-top: 8px; }

@media (max-width: 768px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: sticky; top: 0; z-index: 10; flex-direction: row; overflow-x: auto; padding: 8px; }
  .sidebar .brand { display: none; }
  .sidebar nav { flex-direction: row; }
  .sidebar nav a { padding: 8px 12px; white-space: nowrap; border-left: none; }
  .sidebar nav a.active { border-left: none; border-bottom: 2px solid var(--accent); }
  .content { padding: 14px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}