/* ================================================
   FoodStock Pro — Dark Glassmorphism Theme
   ================================================ */

/* ---------- Reset & Variables ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Surfaces */
  --bg-body: #0b0b10;
  --bg-header: #101018;
  --bg-card: rgba(22, 22, 35, .65);
  --bg-card-hover: rgba(30, 30, 50, .75);
  --border-glass: rgba(255, 255, 255, .06);
  --border-glass-hover: rgba(255, 255, 255, .12);

  /* Accent */
  --accent: #6366f1;           /* indigo / electric blue-violet */
  --accent-glow: rgba(99, 102, 241, .35);
  --accent-light: #818cf8;

  /* Status */
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, .12);
  --danger-border: rgba(239, 68, 68, .45);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, .12);
  --warning-border: rgba(245, 158, 11, .45);
  --success: #22c55e;
  --success-bg: rgba(34, 197, 94, .12);
  --success-border: rgba(34, 197, 94, .5);

  /* Text */
  --text-primary: #eaeaf2;
  --text-secondary: #8b8ba3;
  --text-muted: #555570;

  /* Misc */
  --radius: 14px;
  --radius-sm: 10px;
  --transition: .25s cubic-bezier(.4,0,.2,1);
  --glass-blur: 18px;
  --max-width: 960px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-body);
  color: var(--text-primary);
  min-height: 100dvh;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Subtle grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99,102,241,.12), transparent),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(139,92,246,.08), transparent);
  pointer-events: none;
  z-index: 0;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.glass-card:hover {
  border-color: var(--border-glass-hover);
}

/* ---------- Header ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(16, 16, 24, .82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-glass);
}

.header-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 1.25rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: .55rem;
}

.logo-icon {
  font-size: 1.6rem;
}

.logo h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -.02em;
}

.accent {
  color: var(--accent-light);
}

.header-badge {
  font-size: .65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: .2rem .55rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
}

/* ---------- Tab Navigation ---------- */
.tab-nav {
  position: sticky;
  top: 56px;          /* header height */
  z-index: 90;
  display: flex;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: .6rem 1.25rem 0;
  gap: .5rem;
  background: transparent;
}

.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  padding: .7rem 1rem;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  cursor: pointer;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.tab-btn.active {
  color: var(--accent-light);
  border-color: var(--accent);
  border-bottom: 2px solid var(--bg-body);
  background: rgba(99, 102, 241, .08);
}

.tab-icon {
  font-size: 1.15rem;
}

/* ---------- Main ---------- */
.main-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

/* Views */
.view {
  display: none;
  flex-direction: column;
  gap: 1.15rem;
}

.view.active {
  display: flex;
}

/* ---------- Section Title ---------- */
.section-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: .9rem;
  color: var(--text-primary);
}

/* ---------- Forms ---------- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: .85rem;
  align-items: end;
}

.form-group label {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: .35rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.form-group input {
  width: 100%;
  padding: .7rem .85rem;
  font-size: .92rem;
  color: var(--text-primary);
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* date input colour fix */
input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(.7);
  cursor: pointer;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .7rem 1.3rem;
  font-size: .9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}

.btn:active {
  transform: scale(.97);
}

.btn-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-light);
}

.btn-delete {
  color: var(--danger);
  background: var(--danger-bg);
  padding: .5rem .7rem;
  font-size: .8rem;
  border-radius: 8px;
}

.btn-delete:hover {
  background: rgba(239, 68, 68, .22);
}

/* ---------- Stats Row ---------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .85rem;
}

.stat-card {
  text-align: center;
  padding: 1rem .75rem;
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.1;
}

.stat-label {
  font-size: .75rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-top: .3rem;
  display: block;
}

.stat-danger { color: var(--danger); }
.stat-warning { color: var(--warning); }

/* ---------- Product List ---------- */
.product-list {
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 2.5rem 1rem;
  font-size: .95rem;
}

/* Product Card */
.product-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: .75rem;
  padding: .9rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .025);
  border-left: 4px solid var(--border-glass);
  transition: background var(--transition), border-color var(--transition);
}

.product-card:hover {
  background: rgba(255, 255, 255, .045);
}

.product-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem .9rem;
}

.product-name {
  font-weight: 600;
  font-size: .95rem;
}

.product-qty {
  font-size: .82rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,.05);
  padding: .15rem .55rem;
  border-radius: 6px;
}

.product-date {
  font-size: .82rem;
  color: var(--text-secondary);
}

.product-badge {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: .2rem .55rem;
  border-radius: 6px;
}

/* Status variants */
.status-expired {
  border-left-color: var(--danger);
  background: var(--danger-bg);
}

.status-expired .product-badge {
  background: var(--danger);
  color: #fff;
}

.status-soon {
  border-left-color: var(--warning);
  background: var(--warning-bg);
}

.status-soon .product-badge {
  background: var(--warning);
  color: #000;
}

.status-ok .product-badge {
  background: rgba(255,255,255,.06);
  color: var(--text-secondary);
}

.product-actions {
  display: flex;
  align-items: center;
  gap: .45rem;
}

/* ---------- Supplier Search ---------- */
.search-row {
  display: flex;
  gap: .75rem;
}

.search-row input {
  flex: 1;
  padding: .75rem 1rem;
  font-size: .95rem;
  color: var(--text-primary);
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-row input::placeholder {
  color: var(--text-muted);
}

.search-row input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Supplier Results */
.supplier-results {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.result-header {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: .25rem;
}

.result-header .query-name {
  color: var(--accent-light);
}

/* Supplier Table */
.supplier-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.supplier-table thead th {
  background: rgba(255,255,255,.04);
  padding: .75rem 1rem;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-secondary);
  text-align: left;
  border-bottom: 1px solid var(--border-glass);
}

.supplier-table tbody td {
  padding: .85rem 1rem;
  font-size: .92rem;
  border-bottom: 1px solid var(--border-glass);
  transition: background var(--transition);
}

.supplier-table tbody tr:last-child td {
  border-bottom: none;
}

.supplier-table tbody tr:hover td {
  background: rgba(255,255,255,.03);
}

/* Cheapest row */
.supplier-table tbody tr.cheapest td {
  background: var(--success-bg);
}

.supplier-table tbody tr.cheapest td:first-child {
  border-left: 3px solid var(--success);
}

.cheapest-badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .72rem;
  font-weight: 700;
  color: var(--success);
  background: rgba(34,197,94,.15);
  padding: .15rem .5rem;
  border-radius: 6px;
  margin-left: .5rem;
}

.savings {
  text-align: center;
  margin-top: .5rem;
  font-size: .85rem;
  color: var(--success);
  font-weight: 600;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  padding: .65rem 1.3rem;
  background: var(--accent);
  color: #fff;
  font-size: .88rem;
  font-weight: 600;
  border-radius: 999px;
  box-shadow: 0 8px 30px var(--accent-glow);
  opacity: 0;
  pointer-events: none;
  transition: transform .35s cubic-bezier(.4,0,.2,1), opacity .35s;
  z-index: 999;
  white-space: nowrap;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .header-content { padding: .7rem 1rem; }
  .logo h1 { font-size: 1.1rem; }

  .tab-nav {
    top: 50px;
    padding: .5rem .75rem 0;
  }

  .tab-label { font-size: .8rem; }

  .main-content { padding: .75rem; }

  .glass-card { padding: 1.1rem; }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-action {
    margin-top: .25rem;
  }

  .btn-primary { width: 100%; }

  .stats-row {
    grid-template-columns: repeat(3, 1fr);
    gap: .55rem;
  }

  .stat-value { font-size: 1.35rem; }

  .search-row {
    flex-direction: column;
  }

  .search-row .btn { width: 100%; }

  .supplier-table {
    font-size: .82rem;
  }

  .supplier-table thead th,
  .supplier-table tbody td {
    padding: .6rem .65rem;
  }

  .product-info {
    gap: .3rem .6rem;
  }
}