:root {
  --td-blue: #1578c2;
  --td-blue-dark: #0e5c96;
  --td-blue-light: #eef7fd;
  --td-gray: #58595b;
  --td-gray-light: #77787b;
  --navy: #1e293b;
  --primary: #1578c2;
  --primary-hover: #0e5c96;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #2c333a;
  --muted: #6c757d;
}

* { box-sizing: border-box; }
body {
  font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 13.5px;
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* Müşteri Önizleme Modu Bannerı */
.preview-banner {
  background: linear-gradient(90deg, #15803d, #16a34a);
  color: #fff;
  padding: 8px 0;
  font-size: 13px;
}
.preview-banner-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.preview-exit-btn {
  background: #fff;
  color: #14532d;
  padding: 4px 12px;
  border-radius: 99px;
  text-decoration: none;
  font-weight: 700;
  font-size: 12px;
}
.preview-trigger-btn {
  background: var(--td-blue);
  color: #fff;
  padding: 3px 10px;
  border-radius: 99px;
  text-decoration: none;
  font-weight: 600;
  font-size: 11.5px;
}

/* Üst Kurumsal Bilgi & Döviz Şeridi */
.subbar {
  background: #f8fafc;
  color: var(--td-gray);
  font-size: 12px;
  padding: 6px 0;
  border-bottom: 1px solid #e2e8f0;
}
.subbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.rates-strip, .user-strip {
  display: flex;
  align-items: center;
  gap: 12px;
}
.rate-pill {
  background: #fff;
  border: 1px solid #cbd5e1;
  padding: 2px 10px;
  border-radius: 99px;
  color: var(--navy);
  font-weight: 600;
}
.rate-pill b { color: var(--td-blue); }
.role-badge {
  padding: 2px 9px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 11px;
  text-transform: uppercase;
}
.role-admin { background: #dc2626; color: #fff; }
.role-purchasing { background: var(--td-blue); color: #fff; }
.role-it { background: #0d9488; color: #fff; }
.logout-link { color: #dc2626; text-decoration: none; font-weight: 600; }
.logout-link:hover { text-decoration: underline; }

/* Ana Beyaz E-Ticaret Header (Oksid / PCBayi B2B Tarzı) */
.top {
  background: #ffffff;
  padding: 16px 0;
  border-bottom: 1px solid #e2e8f0;
}
.top-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-logo-img {
  height: 46px;
  width: auto;
  display: block;
}

/* Orta Büyük Arama Çubuğu */
.header-search {
  flex: 1;
  max-width: 620px;
  display: flex;
  border: 2px solid var(--td-blue);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}
.header-search input {
  border: 0;
  margin: 0;
  padding: 10px 14px;
  font-size: 13.5px;
  flex: 1;
  border-radius: 0;
}
.header-search input:focus { box-shadow: none; }
.header-search button {
  border-radius: 0;
  background: var(--td-blue);
  color: #fff;
  padding: 0 22px;
  font-weight: 700;
  font-size: 13.5px;
}
.header-search button:hover { background: var(--td-blue-dark); }

/* Sağ Sipariş & Sepet Kutuları */
.main-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  text-decoration: none;
  color: var(--navy);
  background: #fff;
  transition: all 0.15s;
}
.nav-box:hover, .nav-box.active {
  border-color: var(--td-blue);
  background: var(--td-blue-light);
}
.nav-box .nav-icon { font-size: 20px; }
.nav-box small { display: block; font-size: 10.5px; color: var(--muted); line-height: 1.1; }
.nav-box b { display: block; font-size: 13px; color: var(--navy); }
.nav-box.cart-btn {
  background: var(--td-blue);
  border-color: var(--td-blue);
  color: #fff;
}
.nav-box.cart-btn small { color: #dbeafe; }
.nav-box.cart-btn b { color: #fff; }
.nav-box.cart-btn:hover { background: var(--td-blue-dark); }

/* Teknodata Mavisi Kategori & Menü Şeridi */
.cat-bar {
  background: linear-gradient(90deg, var(--td-blue), #1064a3);
  color: #fff;
  box-shadow: 0 2px 6px rgba(21,120,194,0.18);
}
.cat-bar-inner {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
}
.cat-link {
  color: #fff;
  text-decoration: none;
  padding: 10px 15px;
  font-weight: 600;
  font-size: 13px;
  white-space: nowrap;
  transition: background 0.15s;
}
.cat-link:hover, .cat-link.active {
  background: rgba(255,255,255,0.16);
}
.cat-link-right {
  margin-left: auto;
  background: rgba(0,0,0,0.15);
}

/* Admin Alt Menü Barı */
.admin-bar {
  background: #1e293b;
  border-bottom: 2px solid var(--td-blue);
  padding: 7px 0;
}
.admin-bar-inner {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.admin-tag {
  color: #38bdf8;
  font-weight: 700;
  font-size: 12px;
  margin-right: 8px;
}
.admin-bar a {
  color: #e2e8f0;
  text-decoration: none;
  padding: 5px 11px;
  border-radius: 5px;
  font-size: 12.5px;
  font-weight: 600;
}
.admin-bar a:hover, .admin-bar a.active {
  background: var(--td-blue);
  color: #fff;
}

main.container {
  padding-top: 22px;
  padding-bottom: 48px;
  flex: 1;
}

/* Kartlar ve Izgaralar */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 1px 3px rgba(15,23,42,0.04);
  margin-bottom: 20px;
}
.auth-card {
  max-width: 440px;
  margin: 36px auto;
  padding: 28px;
}
.card h1, .card h2, .card h3 { margin-top: 0; color: var(--navy); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.catalog-layout { display: grid; grid-template-columns: 265px 1fr; gap: 20px; align-items: start; }

@media (max-width: 980px) {
  .grid-2, .grid-3, .grid-4, .catalog-layout { grid-template-columns: 1fr; }
  .top-inner { flex-wrap: wrap; }
  .header-search { order: 3; max-width: 100%; width: 100%; }
  .muted-hide { display: none; }
}

/* KPI İstatistik Kartları */
.kpi-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  border-left: 4px solid var(--td-blue);
}
.kpi-card.green { border-left-color: var(--success); }
.kpi-card.amber { border-left-color: var(--warning); }
.kpi-card.purple { border-left-color: #7c3aed; }
.kpi-label { color: var(--muted); font-size: 11.5px; font-weight: 700; text-transform: uppercase; }
.kpi-val { font-size: 23px; font-weight: 800; color: var(--navy); margin: 4px 0; }
.kpi-sub { font-size: 12px; color: var(--muted); }

/* Form Elemanları */
label { display: block; margin: 10px 0; font-weight: 600; font-size: 13px; color: #334155; }
label small { font-weight: 400; color: var(--muted); }
input, select, textarea {
  display: block;
  width: 100%;
  padding: 9px 11px;
  margin-top: 4px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 13.5px;
  font-family: inherit;
  background: #fff;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--td-blue);
  box-shadow: 0 0 0 3px rgba(21,120,194,0.14);
}

.btn, button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--td-blue);
  color: #fff;
  border: 0;
  padding: 9px 16px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
}
.btn:hover, button:hover { background: var(--td-blue-dark); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-success { background: var(--success); }
.btn-success:hover { background: #15803d; }
.btn-amber { background: var(--warning); }
.btn-danger { background: var(--danger); }
.btn-outline {
  background: #fff;
  color: var(--navy);
  border: 1px solid #cbd5e1;
}
.btn-outline:hover { background: #f8fafc; border-color: var(--td-blue); color: var(--td-blue); }
button.link {
  background: none;
  color: var(--td-blue);
  padding: 2px 6px;
  text-decoration: underline;
  font-weight: 600;
}

/* Tablolar */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th {
  background: #f8fafc;
  color: #475569;
  font-weight: 700;
  text-align: left;
  padding: 11px 12px;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tr:hover td { background: #f8fbff; }

/* Ürün Tablo Küçük Görseli */
.prod-thumb {
  width: 64px;
  height: 52px;
  object-fit: contain;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  background: #fff;
  padding: 2px;
  display: block;
}

/* Ürün Başlık Linki */
.prod-title-link {
  color: var(--navy);
  font-weight: 700;
  font-size: 13.5px;
  text-decoration: none;
  display: inline-block;
  line-height: 1.35;
}
.prod-title-link:hover {
  color: var(--td-blue);
  text-decoration: underline;
}

/* Etiketler ve Rozetler */
.pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
}
.pill-green { background: #dcfce7; color: #166534; }
.pill-red { background: #fee2e2; color: #991b1b; }
.pill-blue { background: #e0f2fe; color: #0369a1; }
.pill-amber { background: #fef3c7; color: #92400e; }
.pill-gray { background: #f1f5f9; color: #475569; }

.mpn-code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  background: #f8fafc;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11.5px;
  color: #1e293b;
  border: 1px solid #cbd5e1;
  font-weight: 600;
}

/* Admin Toptancı Karşılaştırma Kutusu */
.supplier-compare-box {
  margin-top: 6px;
  background: #f8fafc;
  border: 1px dashed #93c5fd;
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 11.5px;
}
.sup-chip {
  display: inline-block;
  margin-right: 6px;
  margin-bottom: 3px;
  padding: 2px 7px;
  border-radius: 4px;
  background: #fff;
  border: 1px solid #cbd5e1;
}
.sup-chip.best {
  background: var(--td-blue-light);
  border-color: var(--td-blue);
  color: var(--td-blue-dark);
  font-weight: 700;
}

/* E-Ticaret Ürün Kart Görünümü (Grid - Oksid / PCBayi Tarzı) */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
  gap: 16px;
}
.prod-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 15px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}
.prod-card:hover {
  transform: translateY(-3px);
  border-color: var(--td-blue);
  box-shadow: 0 8px 20px rgba(21,120,194,0.1);
}
.prod-card-img-wrap {
  display: block;
  text-align: center;
  background: #f8fafc;
  border-radius: 8px;
  padding: 10px;
  margin-bottom: 12px;
  height: 155px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.prod-card-img-wrap img {
  max-width: 100%;
  max-height: 135px;
  object-fit: contain;
  transition: transform 0.2s;
}
.prod-card:hover .prod-card-img-wrap img {
  transform: scale(1.04);
}

/* Ürün Detay Sayfası (product.php) */
.product-detail-grid {
  display: grid;
  grid-template-columns: 440px 1fr;
  gap: 28px;
  align-items: start;
}
.product-gallery-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}
.product-gallery-main {
  width: 100%;
  height: 310px;
  object-fit: contain;
  border-radius: 8px;
  background: #f8fafc;
  padding: 12px;
}
.spec-table th {
  width: 240px;
  background: #f8fafc;
  color: var(--td-gray);
}

@media (max-width: 900px) {
  .product-detail-grid { grid-template-columns: 1fr; }
}

/* Bildirimler */
.alert, .err, .ok {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 18px;
  font-weight: 600;
}
.alert-err, .err { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-ok, .ok { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }

.secret {
  font-family: monospace;
  font-size: 18px;
  letter-spacing: 2px;
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  padding: 10px;
  border-radius: 6px;
  text-align: center;
}

.site-footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 18px 0;
  color: var(--muted);
  font-size: 12px;
  margin-top: auto;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}