:root {
  --red: #e2232c;
  --red-dark: #b71c23;
  --bg: #121417;
  --bg-panel: #1b1f24;
  --bg-panel-2: #22262c;
  --text: #e9ecef;
  --text-muted: #9aa0a6;
  --border: #2c3137;
  --success: #2ecc71;
  --warning: #f1c40f;
  --danger: #e74c3c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--red); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 230px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  padding: 20px 0;
  flex-shrink: 0;
}
.brand { font-weight: 700; font-size: 20px; padding: 0 20px 20px; color: var(--text); }
.brand span { color: var(--red); }
.sidebar nav { display: flex; flex-direction: column; }
.sidebar nav a {
  padding: 10px 20px;
  color: var(--text-muted);
  border-left: 3px solid transparent;
}
.sidebar nav a:hover, .sidebar nav a.active {
  background: var(--bg-panel-2);
  color: var(--text);
  border-left-color: var(--red);
  text-decoration: none;
}

.main { flex: 1; min-width: 0; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
}
.user-box { display: flex; gap: 12px; align-items: center; color: var(--text-muted); }
.btn-link { background: none; border: none; color: var(--red); cursor: pointer; font: inherit; }

.content { padding: 24px; }

.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }

.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; }
.alert-success { background: rgba(46,204,113,.15); border: 1px solid var(--success); color: var(--success); }
.alert-error { background: rgba(231,76,60,.15); border: 1px solid var(--danger); color: var(--danger); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--bg-panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px; }
.stat-label { font-size: 12px; color: var(--text-muted); letter-spacing: .05em; }
.stat-value { font-size: 28px; font-weight: 700; margin-top: 6px; }

.panel-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.panel { background: var(--bg-panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px; }
.panel h2 { margin-top: 0; font-size: 16px; }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); text-align: left; font-size: 14px; }
.data-table th { color: var(--text-muted); font-weight: 600; }

.detail-table { border-collapse: collapse; }
.detail-table th { text-align: left; color: var(--text-muted); padding: 8px 16px 8px 0; vertical-align: top; }
.detail-table td { padding: 8px 0; }

.badge { padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge-online, .badge-active { background: rgba(46,204,113,.15); color: var(--success); }
.badge-offline, .badge-suspended { background: rgba(231,76,60,.15); color: var(--danger); }
.badge-unknown, .badge-expired, .badge-unpaid { background: rgba(241,196,15,.15); color: var(--warning); }
.badge-unused { background: rgba(154,160,166,.2); color: var(--text-muted); }
.badge-used, .badge-paid { background: rgba(46,204,113,.15); color: var(--success); }
.badge-terminated { background: rgba(231,76,60,.15); color: var(--danger); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 20px; max-width: 760px; }
.form-grid label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-muted); }
.form-grid .full { grid-column: 1 / -1; }
.form-grid input, .form-grid select, .form-grid textarea {
  background: var(--bg-panel-2); border: 1px solid var(--border); border-radius: 6px;
  padding: 8px 10px; color: var(--text); font: inherit;
}

.btn-primary, .btn-secondary {
  display: inline-block; padding: 9px 16px; border-radius: 6px; border: none;
  font-weight: 600; cursor: pointer; font-size: 14px;
}
.btn-primary { background: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-dark); text-decoration: none; }
.btn-secondary { background: var(--bg-panel-2); color: var(--text); border: 1px solid var(--border); }
.btn-primary, .btn-secondary, .btn-danger { text-decoration: none; }
.btn-danger { background: #c0392b; color: #fff; }
.btn-danger:hover { background: #a3291b; text-decoration: none; }

.code-block {
  background: #0c0e10; border: 1px solid var(--border); border-radius: 8px;
  padding: 16px; overflow-x: auto; font-family: Consolas, monospace; font-size: 13px;
}

.login-body, .error-body {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
}
.login-card, .error-card {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 40px; width: 340px; text-align: center;
}
.login-card h1 { margin-bottom: 4px; }
.login-card h1 span { color: var(--red); }
.login-card .subtitle { color: var(--text-muted); margin-bottom: 24px; font-size: 13px; }
.login-card form { display: flex; flex-direction: column; gap: 10px; text-align: left; }
.login-card label { font-size: 13px; color: var(--text-muted); }
.login-card input {
  background: var(--bg-panel-2); border: 1px solid var(--border); border-radius: 6px;
  padding: 10px; color: var(--text); font: inherit;
}
.login-card button {
  margin-top: 10px; padding: 10px; border-radius: 6px; border: none;
  background: var(--red); color: #fff; font-weight: 700; cursor: pointer;
}
.error-card h1 { font-size: 48px; color: var(--red); margin: 0; }

.filter-bar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.filter-bar input, .filter-bar select {
  background: var(--bg-panel-2); border: 1px solid var(--border); border-radius: 6px;
  padding: 8px 10px; color: var(--text); font: inherit;
}
.muted { color: var(--text-muted); font-size: 13px; }
.pagination { margin-top: 12px; color: var(--text-muted); font-size: 13px; }

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f4f5f7; --bg-panel: #ffffff; --bg-panel-2: #f0f1f3;
    --text: #1b1f24; --text-muted: #6b7280; --border: #e2e4e8;
  }
}

/* ---- Global search (§14) ---- */
.search-box { position: relative; width: 420px; max-width: 60vw; }
.search-box input {
  width: 100%; background: var(--bg-panel-2); border: 1px solid var(--border);
  border-radius: 6px; padding: 9px 12px; color: var(--text); font-size: 14px;
}
.search-dropdown {
  display: none; position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 8px;
  max-height: 360px; overflow-y: auto; z-index: 50; box-shadow: 0 8px 24px rgba(0,0,0,.3);
}
.search-item { display: block; padding: 10px 14px; border-bottom: 1px solid var(--border); text-decoration: none; color: var(--text); }
.search-item:last-child { border-bottom: none; }
.search-item:hover { background: var(--bg-panel-2); }
.search-type { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: .04em; color: var(--danger); }
.search-title { display: block; font-size: 14px; font-weight: 600; }
.search-sub { display: block; font-size: 12px; color: var(--text-muted); }
.search-empty { padding: 14px; color: var(--text-muted); font-size: 13px; }

/* ---- Notification center (§16) ---- */
.notif-wrap { position: relative; }
.notif-bell-btn { position: relative; font-size: 18px; background: none; border: none; cursor: pointer; color: var(--text); }
.notif-badge {
  position: absolute; top: -6px; right: -10px; background: var(--danger); color: #fff;
  font-size: 10px; font-weight: 700; border-radius: 999px; padding: 1px 6px; line-height: 1.4;
}
.notif-panel {
  position: absolute; top: calc(100% + 10px); right: 0; width: 340px; max-height: 420px;
  overflow-y: auto; background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: 8px; z-index: 50; box-shadow: 0 8px 24px rgba(0,0,0,.3);
}
.notif-head {
  display: flex; justify-content: space-between; align-items: center; padding: 10px 14px;
  border-bottom: 1px solid var(--border); font-weight: 600; font-size: 13px;
}
.notif-item { padding: 10px 14px; border-bottom: 1px solid var(--border); font-size: 13px; }
.notif-item:last-child { border-bottom: none; }
.notif-item.unread { background: rgba(231,76,60,.06); cursor: pointer; }
.notif-title { font-weight: 600; margin-bottom: 2px; }
.notif-msg { color: var(--text-muted); margin-bottom: 4px; }
.notif-time { color: var(--text-muted); font-size: 11px; }
.notif-empty { padding: 16px; color: var(--text-muted); font-size: 13px; text-align: center; }

/* ---- Role & Permission matrix (§17) ---- */
.permission-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin: 12px 0; }
.permission-module { background: var(--bg-panel-2); border: 1px solid var(--border); border-radius: 8px; padding: 12px; }
.permission-module h3 { margin: 0 0 8px; font-size: 12px; letter-spacing: .05em; color: var(--text-muted); }
.checkbox-label { display: flex; align-items: flex-start; gap: 6px; font-size: 13px; margin-bottom: 6px; cursor: pointer; }
.checkbox-label input { margin-top: 3px; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.actions { white-space: nowrap; }
.actions a, .actions .btn-link { margin-right: 8px; }
code { background: var(--bg-panel-2); padding: 2px 6px; border-radius: 4px; font-size: 12px; }