@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #0a0a12;
  --bg-secondary: #12121e;
  --bg-card: #1a1a2e;
  --bg-card-hover: #222240;
  --bg-input: #16162a;
  --bg-glass: rgba(26, 26, 46, 0.7);
  --border: #2a2a4a;
  --border-hover: #3a3a5a;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a8;
  --text-muted: #5c5c7a;
  --accent: #6c5ce7;
  --accent-hover: #7d6ff0;
  --accent-glow: rgba(108, 92, 231, 0.3);
  --success: #00e676;
  --success-bg: rgba(0, 230, 118, 0.1);
  --danger: #ff5252;
  --danger-bg: rgba(255, 82, 82, 0.1);
  --warning: #ffc107;
  --warning-bg: rgba(255, 193, 7, 0.1);
  --info: #40c4ff;
  --info-bg: rgba(64, 196, 255, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.6);
  --transition: all 0.2s ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ── Layout ─────────────────────────────────────────────── */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px; min-height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: fixed; left: 0; top: 0; bottom: 0; z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px;
}

.sidebar-logo {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 16px; color: #fff;
}

.sidebar-brand { font-size: 18px; font-weight: 700; letter-spacing: -0.5px; }

.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }

.nav-section { margin-bottom: 24px; }
.nav-section-title {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  color: var(--text-muted); padding: 0 12px; margin-bottom: 8px;
  letter-spacing: 1px;
}

.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 14px; font-weight: 500;
  cursor: pointer; transition: var(--transition); margin-bottom: 2px;
}
.nav-item:hover { background: var(--bg-card); color: var(--text-primary); }
.nav-item.active {
  background: var(--accent-glow); color: var(--accent);
  border: 1px solid rgba(108,92,231,0.2);
}
.nav-item .icon { font-size: 18px; width: 22px; text-align: center; }
.nav-item .badge {
  margin-left: auto; background: var(--accent);
  color: #fff; font-size: 11px; font-weight: 700;
  padding: 2px 8px; border-radius: 10px; min-width: 22px; text-align: center;
}

.sidebar-footer {
  padding: 16px 20px; border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}
.sidebar-footer .user-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--accent-glow); display: flex; align-items: center;
  justify-content: center; font-weight: 700; font-size: 14px; color: var(--accent);
}
.sidebar-footer .user-info { flex: 1; }
.sidebar-footer .user-name { font-size: 13px; font-weight: 600; }
.sidebar-footer .user-role { font-size: 11px; color: var(--text-muted); }

.main-content { flex: 1; margin-left: 260px; min-height: 100vh; }

.page-header {
  padding: 24px 32px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  backdrop-filter: blur(12px);
  background: rgba(10,10,18,0.8);
  position: sticky; top: 0; z-index: 50;
}
.page-title { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; }
.page-subtitle { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

.page-body { padding: 24px 32px; }

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: var(--transition);
}
.card:hover { border-color: var(--border-hover); }
.card-glass {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.06);
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.card-title { font-size: 16px; font-weight: 600; }

/* ── Stats Grid ─────────────────────────────────────────── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  display: flex; align-items: center; gap: 16px;
  transition: var(--transition);
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-icon {
  width: 48px; height: 48px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
}
.stat-icon.purple { background: var(--accent-glow); color: var(--accent); }
.stat-icon.green { background: var(--success-bg); color: var(--success); }
.stat-icon.red { background: var(--danger-bg); color: var(--danger); }
.stat-icon.blue { background: var(--info-bg); color: var(--info); }
.stat-icon.yellow { background: var(--warning-bg); color: var(--warning); }
.stat-value { font-size: 28px; font-weight: 800; letter-spacing: -1px; }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-family: var(--font); font-size: 14px; font-weight: 600;
  border: none; cursor: pointer; transition: var(--transition);
  text-decoration: none;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 0 20px var(--accent-glow); }
.btn-secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); }
.btn-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(255,82,82,0.2); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-icon { padding: 8px; min-width: 36px; justify-content: center; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Forms ──────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 10px 14px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-family: var(--font); font-size: 14px;
  transition: var(--transition); outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-input::placeholder { color: var(--text-muted); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-error { color: var(--danger); font-size: 12px; margin-top: 4px; }

/* ── Tables ─────────────────────────────────────────────── */
.table-container { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 16px; text-align: left; font-size: 14px; }
th {
  background: var(--bg-secondary); color: var(--text-muted);
  font-weight: 600; font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.5px; border-bottom: 1px solid var(--border);
  position: sticky; top: 0;
}
td { border-bottom: 1px solid rgba(42,42,74,0.4); }
tr:hover td { background: var(--bg-card-hover); }

/* ── Badges ─────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 20px;
  font-size: 12px; font-weight: 600;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-muted { background: rgba(92,92,122,0.2); color: var(--text-muted); }

.online-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.online-dot.on { background: var(--success); box-shadow: 0 0 8px var(--success); }
.online-dot.off { background: var(--text-muted); }

/* ── Modal ──────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px); z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
.modal-backdrop.active { opacity: 1; pointer-events: all; }
.modal {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); width: 90%; max-width: 520px;
  max-height: 85vh; overflow-y: auto; box-shadow: var(--shadow-lg);
  transform: translateY(20px); transition: transform 0.2s;
}
.modal-backdrop.active .modal { transform: translateY(0); }
.modal-header {
  padding: 20px 24px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.modal-title { font-size: 18px; font-weight: 700; }
.modal-close {
  background: none; border: none; color: var(--text-muted);
  font-size: 20px; cursor: pointer; padding: 4px;
}
.modal-close:hover { color: var(--text-primary); }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; gap: 12px; justify-content: flex-end; }

/* ── Toast ──────────────────────────────────────────────── */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 2000; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 14px 20px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500; min-width: 280px;
  box-shadow: var(--shadow); animation: toastIn 0.3s ease;
  display: flex; align-items: center; gap: 10px;
}
.toast-success { background: #1a3a2a; border: 1px solid rgba(0,230,118,0.3); color: var(--success); }
.toast-error { background: #3a1a1a; border: 1px solid rgba(255,82,82,0.3); color: var(--danger); }
.toast-info { background: #1a2a3a; border: 1px solid rgba(64,196,255,0.3); color: var(--info); }
@keyframes toastIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }

/* ── Login Page ─────────────────────────────────────────── */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--bg-primary);
  background-image: radial-gradient(ellipse at 30% 20%, rgba(108,92,231,0.08) 0%, transparent 50%),
                    radial-gradient(ellipse at 70% 80%, rgba(168,85,247,0.06) 0%, transparent 50%);
}
.login-card {
  width: 100%; max-width: 420px; padding: 40px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
}
.login-logo {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  margin-bottom: 32px;
}
.login-logo .sidebar-logo { width: 44px; height: 44px; font-size: 20px; }
.login-logo-text { font-size: 26px; font-weight: 800; letter-spacing: -1px; }
.login-error {
  background: var(--danger-bg); border: 1px solid rgba(255,82,82,0.2);
  color: var(--danger); padding: 12px 16px; border-radius: var(--radius-sm);
  font-size: 13px; margin-bottom: 16px; display: none;
}
.login-error.visible { display: block; }

/* ── Empty State ────────────────────────────────────────── */
.empty-state {
  text-align: center; padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state .icon { font-size: 48px; margin-bottom: 16px; opacity: 0.5; }
.empty-state .title { font-size: 18px; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }

/* ── Skeleton Loading ───────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ── Search Bar ─────────────────────────────────────────── */
.search-bar {
  position: relative; max-width: 320px;
}
.search-bar input {
  width: 100%; padding: 8px 14px 8px 36px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: 13px; outline: none; transition: var(--transition);
}
.search-bar input:focus { border-color: var(--accent); }
.search-bar .search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 14px; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .page-body { padding: 16px; }
  .stats-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}