/* ============================================
   UNI Admin Panel — Styles
   ============================================ */
:root {
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --primary: #0f172a;
  --primary-hover: #1e293b;
  --accent: #f59e0b;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  --sidebar-w: 240px;
  --topbar-h: 60px;
  --radius: 10px;
  --shadow: 0 2px 8px rgba(15,23,42,0.06);
  --shadow-lg: 0 10px 30px rgba(15,23,42,0.10);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

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

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

.sidebar {
  width: var(--sidebar-w);
  background: var(--primary);
  color: white;
  padding: 20px 0;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
}
.sidebar .logo {
  padding: 0 20px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 16px;
}
.sidebar .logo h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: white;
}
.sidebar .logo small {
  color: rgba(255,255,255,0.5);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  border-left: 3px solid transparent;
}
.sidebar nav a:hover, .sidebar nav a.active {
  background: rgba(255,255,255,0.05);
  color: white;
  border-left-color: var(--accent);
  text-decoration: none;
}
.sidebar nav .icon { width: 18px; text-align: center; }
.sidebar nav .group-title {
  padding: 16px 20px 6px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.3);
}

.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topbar {
  height: var(--topbar-h);
  background: white;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar h2 { margin: 0; font-size: 18px; }
.topbar .user {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px;
}
.topbar .user .role-badge {
  background: var(--accent);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.topbar .user button {
  background: transparent; border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 6px; cursor: pointer;
  font-size: 13px;
}
.topbar .user button:hover { background: var(--bg); }

.content { padding: 24px; flex: 1; }

/* ============ Cards & Tables ============ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.card-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px;
}
.card-head h3 { margin: 0; font-size: 16px; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
th, td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--bg); font-weight: 600; color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
tbody tr:hover { background: var(--bg); }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  background: var(--primary);
  color: white;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s;
}
.btn:hover { background: var(--primary-hover); text-decoration: none; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #dc2626; }
.btn-success { background: var(--success); }
.btn-warning { background: var(--warning); color: white; }

/* ============ Forms ============ */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--text);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: white;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15,23,42,0.08);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-help { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ============ Status badges ============ */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-draft     { background: #fef3c7; color: #92400e; }
.badge-published { background: #d1fae5; color: #065f46; }
.badge-archived  { background: #e5e7eb; color: #4b5563; }
.badge-selling   { background: #dbeafe; color: #1e40af; }
.badge-opening   { background: #fef3c7; color: #92400e; }
.badge-soldout   { background: #fee2e2; color: #991b1b; }
.badge-upcoming  { background: #e5e7eb; color: #4b5563; }

.tier-silver   { background: #f1f5f9; color: #475569; }
.tier-gold     { background: #fef3c7; color: #92400e; }
.tier-platinum { background: #e0e7ff; color: #3730a3; }
.tier-diamond  { background: #d1fae5; color: #065f46; }

/* ============ Dashboard stats ============ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.stat .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat .num { font-size: 28px; font-weight: 700; margin-top: 4px; }
.stat .delta { font-size: 12px; color: var(--success); margin-top: 4px; }

/* ============ Login page ============ */
.login-bg {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  padding: 20px;
}
.login-card {
  background: white;
  padding: 40px;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
}
.login-card h1 { margin: 0 0 4px; font-size: 22px; }
.login-card .sub { color: var(--text-muted); margin: 0 0 28px; font-size: 14px; }
.login-card .btn { width: 100%; justify-content: center; padding: 12px; font-size: 15px; }

/* ============ Toast ============ */
.toast {
  position: fixed;
  top: 80px;
  right: 24px;
  padding: 12px 20px;
  border-radius: 8px;
  background: white;
  border-left: 4px solid var(--success);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  font-size: 14px;
  opacity: 0;
  transform: translateX(20px);
  transition: all 0.3s;
}
.toast.show { opacity: 1; transform: translateX(0); }
.toast.error { border-left-color: var(--danger); }

/* ============ Modal ============ */
.modal-bg {
  position: fixed; inset: 0;
  background: rgba(15,23,42,0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal-bg.show { display: flex; }
.modal {
  background: white;
  border-radius: var(--radius);
  width: 100%;
  max-width: 720px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 28px;
  box-shadow: var(--shadow-lg);
}
.modal h3 { margin: 0 0 20px; }
.modal-foot {
  display: flex; gap: 8px; justify-content: flex-end;
  padding-top: 16px; border-top: 1px solid var(--border);
  margin-top: 20px;
}

/* ============ Filter bar ============ */
.filter-bar {
  display: flex; gap: 12px; align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.filter-bar input, .filter-bar select {
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 13px;
}

/* ============ Empty state ============ */
.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

/* ============ Loading ============ */
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ Responsive ============ */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform 0.3s; z-index: 50; }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .form-row { grid-template-columns: 1fr; }
}