:root {
  --bg: #0f1115;
  --card: #161a22;
  --border: #232936;
  --text: #e6e8ee;
  --muted: #8b95a7;
  --primary: #4f7cff;
  --primary-hover: #3e6bff;
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #22c55e;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

main { max-width: 1200px; margin: 0 auto; padding: 24px; }

h1 { margin: 0 0 4px; font-size: 22px; }
h2 { margin: 0 0 14px; font-size: 18px; }
h3 { margin: 18px 0 8px; font-size: 14px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
p  { margin: 4px 0; }
.muted { color: var(--muted); }
.center { text-align: center; }
.spacer { flex: 1; }
.hidden { display: none !important; }

/* ===== Login ===== */
.login-screen { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.login-screen .card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: min(420px, 92vw);
}
.login-screen .muted { margin-bottom: 18px; }

/* ===== Form chung ===== */
label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
}
label:has(input[type="checkbox"]) {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 14px;
}
input, select, textarea {
  width: 100%;
  background: #0c0f15;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 9px 12px;
  font: inherit;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.18);
}
textarea { font-family: ui-monospace, Menlo, Consolas, monospace; resize: vertical; }

button {
  border: 0;
  border-radius: 8px;
  padding: 9px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: 0.15s ease;
}
button.primary { background: var(--primary); color: #fff; }
button.primary:hover { background: var(--primary-hover); }
button.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
button.ghost:hover { background: #1c2230; }
button.danger { background: var(--danger); color: #fff; }
button.danger:hover { background: #dc2626; }
.error { color: var(--danger); font-size: 13px; min-height: 18px; }

/* ===== Topbar ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
  gap: 16px;
}
.topbar .actions { display: flex; gap: 8px; }

/* ===== Stats ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-bottom: 22px;
}
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}
.stat .label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 4px; }
.stat.active .value { color: var(--success); }
.stat.revoked .value { color: var(--danger); }
.stat.expired .value { color: var(--warning); }

/* ===== Toolbar ===== */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.toolbar .filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.toolbar .filters select, .toolbar .filters input { min-width: 160px; }
.toolbar .actions { display: flex; gap: 8px; }

/* ===== Table ===== */
.table-wrap {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow-x: auto;
}
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
th {
  background: #11151c;
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
tbody tr:hover { background: #131820; }
tbody tr:last-child td { border-bottom: 0; }
.key-cell { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; }

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge.tier-free { background: #1f2937; color: #9ca3af; }
.badge.tier-pro { background: rgba(79, 124, 255, 0.18); color: #93b4ff; }
.badge.tier-team { background: rgba(34, 197, 94, 0.18); color: #86efac; }
.badge.tier-enterprise { background: rgba(168, 85, 247, 0.18); color: #d8b4fe; }
.badge.status-active { background: rgba(34, 197, 94, 0.18); color: #86efac; }
.badge.status-expired { background: rgba(245, 158, 11, 0.18); color: #fcd34d; }
.badge.status-revoked { background: rgba(239, 68, 68, 0.18); color: #fca5a5; }
.badge.permanent { background: rgba(99, 102, 241, 0.18); color: #c4b5fd; }

.row-actions { display: flex; gap: 6px; justify-content: flex-end; }
.row-actions button { padding: 5px 10px; font-size: 12px; }

/* ===== Dialog ===== */
dialog {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 24px;
  width: min(520px, 92vw);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
.dialog-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  align-items: center;
}
.key-display {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  background: #0c0f15;
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 14px;
}
.devices { display: flex; flex-direction: column; gap: 6px; max-height: 200px; overflow-y: auto; }
.device {
  display: flex;
  gap: 12px;
  background: #0c0f15;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 12px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
}
.device .field { color: var(--muted); min-width: 80px; }
.empty-devices { color: var(--muted); font-size: 12px; }