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

/* ── Design Tokens ─────────────────────────────────────── */
:root {
  --primary:        #6C63FF;
  --primary-dark:   #5A52D5;
  --primary-light:  #EEF0FF;
  --accent:         #FF6584;
  --success:        #22C55E;
  --warning:        #F59E0B;
  --danger:         #EF4444;
  --dark:           #0F0E17;
  --gray-900:       #1A1A2E;
  --gray-700:       #374151;
  --gray-500:       #6B7280;
  --gray-300:       #D1D5DB;
  --gray-100:       #F3F4F6;
  --white:          #FFFFFF;
  --radius:         12px;
  --radius-sm:      8px;
  --shadow-sm:      0 1px 3px rgba(0,0,0,0.1);
  --shadow:         0 4px 20px rgba(108,99,255,0.12);
  --shadow-lg:      0 20px 60px rgba(108,99,255,0.18);
  --transition:     all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--gray-100);
  color: var(--gray-700);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── Utilities ─────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 520px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.text-muted { color: var(--gray-500); }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }
.flex { display: flex; } .flex-col { flex-direction: column; }
.items-center { align-items: center; } .justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; } .gap-2 { gap: 16px; } .gap-3 { gap: 24px; }
.hidden { display: none !important; }
.w-full { width: 100%; }

/* ── Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 600; transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white); box-shadow: 0 4px 15px rgba(108,99,255,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(108,99,255,0.45); }
.btn-secondary { background: var(--white); color: var(--primary); border: 2px solid var(--primary); }
.btn-secondary:hover { background: var(--primary-light); }
.btn-danger { background: var(--danger); color: var(--white); }
.btn-danger:hover { background: #dc2626; }
.btn-success { background: var(--success); color: var(--white); }
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-lg { padding: 16px 36px; font-size: 17px; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; }

/* ── Form Elements ─────────────────────────────────────── */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; color: var(--gray-700); }
.form-control {
  width: 100%; padding: 12px 16px;
  border: 2px solid var(--gray-300); border-radius: var(--radius-sm);
  font-size: 15px; font-family: inherit; color: var(--gray-700);
  background: var(--white); transition: var(--transition);
  outline: none;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(108,99,255,0.15); }
.form-control.error { border-color: var(--danger); }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B7280' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 40px; }

/* ── Card ───────────────────────────────────────────────── */
.card {
  background: var(--white); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); overflow: hidden;
}
.card-body { padding: 28px; }
.card-header { padding: 20px 28px; border-bottom: 1px solid var(--gray-100); font-weight: 700; font-size: 17px; }

/* ── Badge ──────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
}
.badge-success { background: #DCFCE7; color: #166534; }
.badge-warning { background: #FEF9C3; color: #854D0E; }
.badge-danger  { background: #FEE2E2; color: #991B1B; }
.badge-purple  { background: var(--primary-light); color: var(--primary-dark); }
.badge-gray    { background: var(--gray-100); color: var(--gray-500); }

/* ── Alert ──────────────────────────────────────────────── */
.alert {
  padding: 14px 18px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500; margin-bottom: 20px;
}
.alert-error   { background: #FEE2E2; color: #991B1B; border-left: 4px solid var(--danger); }
.alert-success { background: #DCFCE7; color: #166534; border-left: 4px solid var(--success); }
.alert-info    { background: var(--primary-light); color: var(--primary-dark); border-left: 4px solid var(--primary); }

/* ── Table ──────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { padding: 12px 16px; text-align: left; font-weight: 600; color: var(--gray-500); background: var(--gray-100); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
td { padding: 14px 16px; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #FAFAFA; }

/* ── Navbar ─────────────────────────────────────────────── */
.navbar {
  background: var(--white); border-bottom: 1px solid var(--gray-100);
  padding: 0 24px; height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
  box-shadow: var(--shadow-sm);
}
.navbar-brand {
  font-size: 22px; font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.navbar-links { display: flex; align-items: center; gap: 8px; }

/* ── Sidebar Layout ─────────────────────────────────────── */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 240px; background: var(--gray-900); color: var(--white);
  display: flex; flex-direction: column; flex-shrink: 0; min-height: 100vh;
}
.sidebar-logo {
  padding: 24px 20px; font-size: 20px; font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-nav { padding: 16px 12px; flex: 1; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.65); font-size: 14px; font-weight: 500;
  transition: var(--transition); margin-bottom: 4px;
}
.sidebar-nav a:hover, .sidebar-nav a.active {
  background: rgba(108,99,255,0.2); color: var(--white);
}
.sidebar-nav a i { width: 18px; }
.sidebar-footer { padding: 16px; border-top: 1px solid rgba(255,255,255,0.08); }
.main-content { flex: 1; overflow-y: auto; }
.page-header { padding: 28px 32px 0; margin-bottom: 24px; }
.page-header h1 { font-size: 24px; font-weight: 800; color: var(--dark); }
.page-header p { font-size: 14px; color: var(--gray-500); margin-top: 4px; }
.page-body { padding: 0 32px 40px; }

/* ── Stats Grid ─────────────────────────────────────────── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 20px; }
.stat-card {
  background: var(--white); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm);
}
.stat-card .stat-label { font-size: 12px; font-weight: 600; color: var(--gray-500); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 8px; }
.stat-card .stat-value { font-size: 32px; font-weight: 800; color: var(--dark); }
.stat-card .stat-icon {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; margin-bottom: 16px;
}

/* ── Auth Card ──────────────────────────────────────────── */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #EEF0FF 0%, #F8F4FF 100%); padding: 24px; }
.auth-card { background: var(--white); border-radius: 20px; box-shadow: var(--shadow-lg); padding: 48px 40px; width: 100%; max-width: 460px; }
.auth-card .brand { text-align: center; margin-bottom: 32px; }
.auth-card .brand h1 { font-size: 28px; font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.auth-card .brand p { color: var(--gray-500); font-size: 14px; margin-top: 6px; }
.divider { text-align: center; color: var(--gray-300); margin: 20px 0; font-size: 13px; }

/* ── Loading Spinner ────────────────────────────────────── */
.spinner { width: 20px; height: 20px; border: 2px solid rgba(255,255,255,0.3); border-top-color: white; border-radius: 50%; animation: spin 0.6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { width: 100%; min-height: auto; flex-direction: row; flex-wrap: wrap; }
  .layout { flex-direction: column; }
  .page-body, .page-header { padding-left: 16px; padding-right: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .auth-card { padding: 32px 24px; }
}

/* ── Animations ─────────────────────────────────────────── */
.fade-in { animation: fadeIn 0.4s ease both; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* ── Modal ──────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 999; padding: 20px;
}
.modal {
  background: var(--white); border-radius: 16px;
  width: 100%; max-width: 480px; padding: 32px;
  animation: fadeIn 0.2s ease both;
}
.modal h3 { font-size: 20px; font-weight: 700; margin-bottom: 16px; }
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 24px; }