/* RestaurantIQ - Premium SaaS Styles */
:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-sidebar: #0f172a;
  --text: #0f172a;
  --text-muted: #64748b;
  --text-sidebar: #94a3b8;
  --border: #e2e8f0;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --sidebar-width: 260px;
  --header-height: 64px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #334155;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
}

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

html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; height: auto; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* Layout */
.app-layout { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  color: var(--text-sidebar);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease;
}
.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  gap: 12px;
}
.sidebar-logo {
  width: 36px; height: 36px;
  background: var(--primary);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 1.1rem;
}
.sidebar-brand { color: #f8fafc; font-weight: 700; font-size: 1.15rem; }
.sidebar-nav { flex: 1; overflow-y: auto; padding: 12px 0; }
.nav-section { padding: 8px 16px 4px; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; color: #64748b; }
.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 20px;
  color: var(--text-sidebar);
  transition: all 0.15s;
  border-left: 3px solid transparent;
}
.nav-item:hover { background: rgba(255,255,255,0.05); color: #f1f5f9; }
.nav-item.active {
  background: rgba(59,130,246,0.15);
  color: #60a5fa;
  border-left-color: var(--primary);
}
.nav-item svg { width: 20px; height: 20px; flex-shrink: 0; opacity: 0.8; }
.nav-item.active svg { opacity: 1; }

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.topbar {
  height: var(--header-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar-left { display: flex; align-items: center; gap: 16px; }
.menu-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  color: var(--text); padding: 8px;
}
.page-title { font-size: 1.15rem; font-weight: 600; }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.user-menu {
  display: flex; align-items: center; gap: 10px;
  cursor: pointer; padding: 6px 10px; border-radius: var(--radius-sm);
}
.user-menu:hover { background: var(--bg); }
.user-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 0.9rem;
}
.content-area { padding: 24px; flex: 1; }

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.card-title { font-size: 1rem; font-weight: 600; }
.card-body { padding: 20px; }

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 6px; font-weight: 500; }
.stat-value { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.02em; }
.stat-change { font-size: 0.75rem; margin-top: 6px; }
.stat-change.up { color: var(--success); }
.stat-change.down { color: var(--danger); }
.stat-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
}
.stat-icon.blue { background: #dbeafe; color: #2563eb; }
.stat-icon.green { background: #d1fae5; color: #059669; }
.stat-icon.orange { background: #ffedd5; color: #ea580c; }
.stat-icon.red { background: #fee2e2; color: #dc2626; }
.stat-icon.purple { background: #ede9fe; color: #7c3aed; }

[data-theme="dark"] .stat-icon.blue { background: #1e3a5f; }
[data-theme="dark"] .stat-icon.green { background: #064e3b; }
[data-theme="dark"] .stat-icon.orange { background: #7c2d12; }
[data-theme="dark"] .stat-icon.red { background: #7f1d1d; }
[data-theme="dark"] .stat-icon.purple { background: #4c1d95; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-weight: 550;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  line-height: 1.2;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-icon { padding: 8px; width: 36px; height: 36px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 0.85rem; font-weight: 500; margin-bottom: 6px; color: var(--text); }
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
.form-select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); }
th { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); font-weight: 600; background: var(--bg); }
td { font-size: 0.9rem; }
tr:hover td { background: rgba(59,130,246,0.03); }

/* Badges */
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 550;
}
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #cffafe; color: #155e75; }
.badge-primary { background: #dbeafe; color: #1e40af; }
.badge-secondary { background: #f1f5f9; color: #475569; }

[data-theme="dark"] .badge-success { background: #064e3b; color: #6ee7b7; }
[data-theme="dark"] .badge-warning { background: #78350f; color: #fcd34d; }
[data-theme="dark"] .badge-danger { background: #7f1d1d; color: #fca5a5; }
[data-theme="dark"] .badge-info { background: #164e63; color: #67e8f9; }
[data-theme="dark"] .badge-primary { background: #1e3a5f; color: #93c5fd; }

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #e0f2fe; color: #075985; border: 1px solid #bae6fd; }

/* AI Card */
.ai-card {
  background: linear-gradient(135deg, #1e3a5f 0%, #1e293b 100%);
  color: #f1f5f9;
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid #334155;
  position: relative;
  overflow: hidden;
}
.ai-card::before {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(59,130,246,0.2) 0%, transparent 70%);
}
.ai-score {
  font-size: 2.5rem;
  font-weight: 800;
  color: #60a5fa;
}
.ai-label { font-size: 0.85rem; color: #94a3b8; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}
.empty-state svg { width: 64px; height: 64px; margin-bottom: 16px; opacity: 0.4; }
.empty-state h3 { color: var(--text); margin-bottom: 8px; }
.empty-state p { margin-bottom: 20px; }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  padding: 20px;
  opacity: 0; visibility: hidden;
  transition: all 0.2s;
}
.modal-overlay.show { opacity: 1; visibility: visible; }
.modal {
  background: var(--bg-card);
  border-radius: var(--radius);
  width: 100%; max-width: 520px;
  max-height: 90vh; overflow-y: auto;
  box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  transform: translateY(20px);
  transition: transform 0.2s;
}
.modal-overlay.show .modal { transform: translateY(0); }
.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.modal-body { padding: 20px; }
.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: flex-end; gap: 10px;
}

/* Subscription banner */
.sub-banner {
  background: linear-gradient(90deg, #fef3c7, #fde68a);
  color: #92400e;
  padding: 10px 20px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 500;
}
.sub-banner.expired {
  background: linear-gradient(90deg, #fee2e2, #fecaca);
  color: #991b1b;
}

/* Grid helpers */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mt-4 { margin-top: 16px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.85rem; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.fw-600 { font-weight: 600; }

/* Landing */
.landing-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 40px;
  background: rgba(15,23,42,0.9);
  backdrop-filter: blur(12px);
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
}
.landing-hero {
  min-height: 100vh;
  background: linear-gradient(160deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  color: #f8fafc;
  display: flex; align-items: center;
  padding: 100px 40px 60px;
}
.hero-content { max-width: 680px; }
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.hero-title span { color: #60a5fa; }
.hero-sub { font-size: 1.15rem; color: #94a3b8; margin-bottom: 32px; line-height: 1.6; }
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

/* Responsive */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .menu-toggle { display: block; }
  .form-row, .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .content-area { padding: 16px; }
  .landing-nav { padding: 12px 20px; }
  .landing-hero { padding: 80px 20px 40px; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
}

/* Animations */
@media (prefers-reduced-motion: no-preference) {
  .stat-card { animation: fadeUp 0.4s ease both; }
  .stat-card:nth-child(2) { animation-delay: 0.05s; }
  .stat-card:nth-child(3) { animation-delay: 0.1s; }
  .stat-card:nth-child(4) { animation-delay: 0.15s; }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
  }
}

/* Sidebar overlay mobile */
.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
}
.sidebar-overlay.show { display: block; }