/* ==========================================================================
   BEYOĞLU TEKNOLOJİ — SHOP-INSPIRED DESIGN SYSTEM v3
   Clean canvas · Image-first · Restrained elevation · Premium B2B feel
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
  /* ── BRAND CORE TOKENS (Phase 3 Strict Identity) ──────────────────── */
  --brand-red:          #D12131;       /* Kurumsal Beyoğlu Kırmızı        */
  --brand-navy:         #1A1F2E;       /* Kurumsal Koyu Lacivert          */
  --brand-navy-dark:    #0f172a;       /* Derin Gece Laciverti            */

  /* ── CANVAS & SURFACES ─────────────────────────────────────────────── */
  --surface:            #ffffff;       /* Pure white cards & panels       */
  --surface-soft:       #f8fafc;       /* Soft slate tint                 */
  --surface-subtle:     #f1f5f9;       /* Subtle border / fill            */
  --bt-bg:              #f8fafc;       /* Canvas neutral                  */
  --bt-canvas:          #f8fafc;       /* Page bg alias                   */
  --bt-surface:         #ffffff;       /* Pure white cards & panels       */
  --bt-surface-raised:  #ffffff;       /* Elevated cards                  */
  --bt-surface-subtle:  #f8fafc;       /* Subtle alt surface              */
  --bt-surface-inset:   #f1f5f9;       /* Inset / code bg                 */

  /* ── BRAND — Beyoğlu Teknoloji Red (Preserved Mark) ──────────────── */
  --bt-primary:         #D12131;       /* Brand Primary Red (#D12131)     */
  --bt-primary-hover:   #b01826;       /* Darker hover state              */
  --bt-primary-active:  #94121e;       /* Active / pressed                */
  --bt-primary-light:   #fdf2f2;       /* Ultra-soft red tint background  */
  --bt-primary-border:  #f8d2d5;       /* Subtle red tinted border        */
  --bt-primary-text:    #D12131;       /* Primary text links              */

  /* ── TYPOGRAPHY HIERARCHY ─────────────────────────────────────────── */
  --text-primary:       #0f172a;       /* Deep slate primary text         */
  --text-secondary:     #475569;       /* Balanced secondary copy         */
  --text-muted:         #94a3b8;       /* Meta labels, subtle text        */
  --bt-text:            #0f172a;       /* Slate 900                       */
  --bt-text-secondary:  #475569;       /* Slate 600                       */
  --bt-muted:           #94a3b8;       /* Slate 400                       */
  --bt-faint:           #cbd5e1;       /* Slate 300 / Placeholders        */
  --bt-on-dark:         #f8fafc;       /* Text on dark surfaces           */

  /* ── BORDERS & DIVIDERS ───────────────────────────────────────────── */
  --border:             #e2e8f0;       /* Standard hairline border        */
  --border-light:       #f1f5f9;       /* Subtle dividers                 */
  --bt-border:          #e2e8f0;       /* Standard hairline border        */
  --bt-border-light:    #f1f5f9;       /* Subtle dividers                 */
  --bt-border-focus:    #D12131;       /* Focus outline                   */
  --bt-border-strong:   #cbd5e1;       /* Emphasized border               */

  /* ── DARK SURFACES (Footer, Contrast accents) ─────────────────────── */
  --bt-dark:            #0f172a;       /* Deep dark                       */
  --bt-dark-2:          #1A1F2E;       /* Brand Navy                      */
  --bt-dark-3:          #242b3d;       /* Lighter navy                    */
  --bt-dark-border:     rgba(255,255,255,0.12);

  /* ── SEMANTIC STATUS ──────────────────────────────────────────────── */
  --success:            #16a34a;       /* Green                           */
  --warning:            #d97706;       /* Amber                           */
  --danger:             #dc2626;       /* Red                             */
  --bt-success:         #16a34a;
  --bt-success-light:   #f0fdf4;
  --bt-warning:         #d97706;
  --bt-warning-light:   #fffbeb;
  --bt-danger:          #dc2626;
  --bt-danger-light:    #fef2f2;
  --bt-info:            #0284c7;
  --bt-info-light:      #f0f9ff;

  /* ── BACKWARD COMPAT ALIASES ───────────────────────────────────────── */
  --color-primary:       var(--bt-primary);
  --color-primary-hover: var(--bt-primary-hover);
  --color-primary-light: var(--bt-primary-light);
  --color-bg:            var(--bt-canvas);
  --color-surface:       var(--bt-surface);
  --color-text:          var(--bt-text);
  --color-muted:         var(--bt-muted);
  --color-border:        var(--bt-border);
  --color-success:       var(--bt-success);
  --color-danger:        var(--bt-danger);
  --color-warning:       var(--bt-warning);
  --primary:             var(--bt-primary);
  --primary-hover:       var(--bt-primary-hover);
  --dark-navy:           var(--bt-dark-2);
  --bt-secondary:        var(--bt-dark-2);
  --bt-secondary-hover:  var(--bt-dark);
  --bt-container:        1440px;

  /* ── TYPOGRAPHY SCALE & FONT STACK ────────────────────────────────── */
  --bt-font-sans:    'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --bt-font-heading: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --bt-font-mono:    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --bt-text-xs:   0.75rem;     /* 12px */
  --bt-text-sm:   0.8125rem;   /* 13px */
  --bt-text-base: 0.9375rem;   /* 15px */
  --bt-text-md:   1.0rem;      /* 16px */
  --bt-text-lg:   1.125rem;    /* 18px */
  --bt-text-xl:   1.25rem;     /* 20px */
  --bt-text-2xl:  1.5rem;      /* 24px */
  --bt-text-3xl:  1.875rem;    /* 30px */
  --bt-text-4xl:  2.25rem;     /* 36px */

  /* ── RADIUS — Apple Rounded Curves ────────────────────────────────── */
  --bt-radius-xs:   6px;
  --bt-radius-sm:   10px;      /* Inputs, small chips            */
  --bt-radius-md:   16px;      /* Buttons, sub-cards             */
  --bt-radius-lg:   20px;      /* Product cards, panels          */
  --bt-radius-xl:   28px;      /* Hero & campaign hero cards     */
  --bt-radius-2xl:  32px;
  --bt-radius-pill: 9999px;    /* Search, chips, pills           */
  --bt-radius-full: 9999px;

  /* ── SHADOW — ALMOST ZERO (Hairline borders do the work) ──────────── */
  --bt-shadow-xs:   0 1px 2px rgba(0,0,0,0.03);
  --bt-shadow-sm:   0 1px 3px rgba(0,0,0,0.04);
  --bt-shadow-md:   0 3px 10px rgba(0,0,0,0.05);
  --bt-shadow-card: 0 1px 3px rgba(0,0,0,0.03);
  --bt-shadow-card-hover: 0 4px 14px rgba(0,0,0,0.06);
  --bt-shadow-lg:   0 6px 20px rgba(0,0,0,0.06);
  --bt-shadow-dropdown: 0 10px 30px rgba(0,0,0,0.08), 0 0 0 1px rgba(0,0,0,0.04);

  /* ── SPACING SCALE ─────────────────────────────────────────────────── */
  --bt-space-1:  4px;
  --bt-space-2:  8px;
  --bt-space-3:  12px;
  --bt-space-4:  16px;
  --bt-space-5:  20px;
  --bt-space-6:  24px;
  --bt-space-8:  32px;
  --bt-space-10: 40px;
  --bt-space-12: 48px;
  --bt-space-16: 64px;
  /* Legacy aliases */
  --bt-space-8px:  8px;
  --bt-space-12px: 12px;
  --bt-space-16px: 16px;
  --bt-space-20px: 20px;
  --bt-space-24px: 24px;
  --bt-space-32px: 32px;
  --bt-space-40px: 40px;
  --bt-space-48px: 48px;
  --bt-space-64px: 64px;

  /* ── LAYOUT ────────────────────────────────────────────────────────── */
  --bt-container-max:  1400px;
  --bt-header-height:  76px;
  --bt-nav-height:     48px;

  /* ── TRANSITIONS ───────────────────────────────────────────────────── */
  --bt-transition-fast:   0.15s ease;
  --bt-transition-base:   0.2s ease;
  --bt-transition-slow:   0.3s ease;
  --bt-transition:        0.2s ease;
}

/* ==========================================================================
   BASE RESET
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--bt-font-sans);
  font-size: var(--bt-text-base);
  color: var(--bt-text);
  background-color: var(--bt-canvas);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ==========================================================================
   CONTAINER
   ========================================================================== */
.container, .bt-container {
  width: 100%;
  max-width: var(--bt-container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--bt-space-6);
  padding-right: var(--bt-space-6);
}

@media (max-width: 768px) {
  .container, .bt-container {
    padding-left: var(--bt-space-4);
    padding-right: var(--bt-space-4);
  }
}

/* ==========================================================================
   BUTTON SYSTEM
   ========================================================================== */
.btn, .bt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--bt-space-2);
  font-family: var(--bt-font-sans);
  font-weight: 600;
  font-size: var(--bt-text-sm);
  line-height: 1.25;
  text-decoration: none;
  cursor: pointer;
  border-radius: var(--bt-radius-md);
  transition: background-color var(--bt-transition-fast),
              border-color var(--bt-transition-fast),
              color var(--bt-transition-fast),
              box-shadow var(--bt-transition-fast),
              transform var(--bt-transition-fast);
  border: 1.5px solid transparent;
  white-space: nowrap;
  user-select: none;
  min-height: 42px;
  padding: 0 1.25rem;
  letter-spacing: -0.01em;
}

.btn:active, .bt-btn:active {
  transform: scale(0.98);
}

.btn-sm, .bt-btn-sm {
  min-height: 34px;
  padding: 0 0.85rem;
  font-size: var(--bt-text-xs);
  border-radius: var(--bt-radius-sm);
}

.btn-lg, .bt-btn-lg {
  min-height: 50px;
  padding: 0 1.75rem;
  font-size: var(--bt-text-base);
  font-weight: 700;
  border-radius: var(--bt-radius-md);
}

/* Pill modifier */
.btn-pill {
  border-radius: var(--bt-radius-pill);
}

/* Variants */
.btn-primary, .bt-btn-primary {
  background-color: var(--bt-primary);
  color: #ffffff;
  border-color: var(--bt-primary);
}
.btn-primary:hover, .bt-btn-primary:hover {
  background-color: var(--bt-primary-hover);
  border-color: var(--bt-primary-hover);
  color: #ffffff;
}
.btn-primary:focus-visible, .bt-btn-primary:focus-visible {
  outline: 3px solid var(--bt-primary);
  outline-offset: 2px;
}

.btn-secondary, .bt-btn-secondary {
  background-color: var(--bt-dark-2);
  color: #ffffff;
  border-color: var(--bt-dark-2);
}
.btn-secondary:hover, .bt-btn-secondary:hover {
  background-color: var(--bt-dark);
  border-color: var(--bt-dark);
  color: #ffffff;
}

.btn-outline, .bt-btn-outline {
  background-color: transparent;
  color: var(--bt-text);
  border-color: var(--bt-border-strong);
}
.btn-outline:hover, .bt-btn-outline:hover {
  background-color: var(--bt-surface-subtle);
  border-color: var(--bt-text);
  color: var(--bt-text);
}

.btn-ghost, .bt-btn-ghost {
  background-color: transparent;
  color: var(--bt-muted);
  border-color: transparent;
}
.btn-ghost:hover, .bt-btn-ghost:hover {
  background-color: var(--bt-surface-inset);
  color: var(--bt-text);
}

/* ==========================================================================
   FORM CONTROLS
   ========================================================================== */
.form-group, .bt-form-group {
  margin-bottom: var(--bt-space-4);
  display: flex;
  flex-direction: column;
  gap: var(--bt-space-1);
}

.form-label, .bt-form-label {
  font-size: var(--bt-text-sm);
  font-weight: 600;
  color: var(--bt-text);
  display: block;
}

.form-control, .bt-form-control,
.form-input, .bt-form-input,
.form-select, .bt-form-select {
  width: 100%;
  font-family: var(--bt-font-sans);
  font-size: 16px; /* Prevent zoom on iOS */
  line-height: 1.4;
  color: var(--bt-text);
  background-color: var(--bt-surface);
  border: 1.5px solid var(--bt-border);
  border-radius: var(--bt-radius-sm);
  padding: 0.625rem 0.875rem;
  transition: border-color var(--bt-transition-fast),
              box-shadow var(--bt-transition-fast);
  outline: none;
  min-height: 44px;
  appearance: none;
  -webkit-appearance: none;
}

@media (min-width: 769px) {
  .form-control, .bt-form-control,
  .form-input, .bt-form-input,
  .form-select, .bt-form-select {
    font-size: var(--bt-text-sm);
    min-height: 42px;
  }
}

.form-control:focus, .bt-form-control:focus,
.form-input:focus, .form-select:focus {
  border-color: var(--bt-primary);
  box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.12);
}

.form-help, .bt-form-help {
  font-size: var(--bt-text-xs);
  color: var(--bt-muted);
}

.form-error, .bt-form-error {
  font-size: var(--bt-text-xs);
  color: var(--bt-danger);
  font-weight: 600;
}

/* ==========================================================================
   PRODUCT CARD SYSTEM — Image-first, Clean Hierarchy
   ========================================================================== */
.bt-product-card {
  background: var(--bt-surface);
  border: 1px solid var(--bt-border);
  border-radius: var(--bt-radius-lg);
  padding: 0;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--bt-shadow-card);
  transition: transform var(--bt-transition-base),
              box-shadow var(--bt-transition-base),
              border-color var(--bt-transition-base);
  height: 100%;
}

.bt-product-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
  border-color: var(--bt-border-strong);
}

/* 1:1 Image Area */
.bt-product-media {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--bt-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--bt-space-3);
  overflow: hidden;
  text-decoration: none;
  border-radius: var(--bt-radius-lg) var(--bt-radius-lg) 0 0;
  background-color: #fafafa;
}

.bt-product-thumb {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.bt-product-card:hover .bt-product-thumb {
  transform: scale(1.05);
}

/* Badges — top-left of image */
.bt-product-badges {
  position: absolute;
  top: var(--bt-space-2);
  left: var(--bt-space-2);
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 2;
  pointer-events: none;
}

.bt-badge-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--bt-radius-xs);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.5;
}

.bt-badge-discount {
  background: var(--bt-primary);
  color: #ffffff;
}

.bt-badge-featured {
  background: var(--bt-dark-2);
  color: #ffffff;
}

.bt-badge-new {
  background: var(--bt-success);
  color: #ffffff;
}

/* Favorite button — top-right of image */
.bt-product-quick-actions {
  position: absolute;
  top: var(--bt-space-2);
  right: var(--bt-space-2);
  display: flex;
  flex-direction: column;
  gap: 4px;
  opacity: 0;
  transform: translateX(4px);
  transition: opacity var(--bt-transition-base),
              transform var(--bt-transition-base);
  z-index: 2;
}

.bt-product-card:hover .bt-product-quick-actions,
.bt-product-card:focus-within .bt-product-quick-actions {
  opacity: 1;
  transform: translateX(0);
}

.bt-quick-action-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--bt-radius-pill);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(4px);
  border: 1px solid var(--bt-border);
  color: var(--bt-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--bt-shadow-sm);
  transition: all var(--bt-transition-fast);
  font-size: 14px;
}

.bt-quick-action-btn:hover {
  background: var(--bt-primary);
  border-color: var(--bt-primary);
  color: #ffffff;
  transform: scale(1.08);
}

/* Card body */
.bt-product-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--bt-space-3) var(--bt-space-3) var(--bt-space-3);
  gap: 0;
}

.bt-product-brand {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--bt-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.bt-product-title {
  font-size: var(--bt-text-sm);
  font-weight: 600;
  color: var(--bt-text);
  line-height: 1.4;
  margin: 0 0 var(--bt-space-2) 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.4em;
  letter-spacing: -0.01em;
}

.bt-product-title a {
  color: inherit;
  text-decoration: none;
}
.bt-product-title a:hover {
  color: var(--bt-primary);
}

/* Rating — only shown when data exists */
.bt-product-rating {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--bt-text-xs);
  margin-bottom: var(--bt-space-2);
}
.bt-product-rating-stars { color: #f59e0b; }
.bt-product-rating-count { color: var(--bt-muted); }

/* Price */
.bt-product-price-box {
  margin-top: auto;
  padding-top: var(--bt-space-2);
  margin-bottom: var(--bt-space-2);
}

.bt-price-old {
  font-size: var(--bt-text-xs);
  color: var(--bt-faint);
  text-decoration: line-through;
  margin-bottom: 1px;
}

.bt-price-current {
  font-size: var(--bt-text-lg);
  font-weight: 800;
  color: var(--bt-text);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.bt-price-kdv {
  font-size: 0.6875rem;
  color: var(--bt-faint);
  margin-top: 2px;
}

/* Stock */
.bt-product-stock-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--bt-space-2);
}

.bt-stock-pill {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--bt-radius-xs);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: var(--bt-success-light);
  color: var(--bt-success);
}

.bt-stock-pill.out-of-stock {
  background: var(--bt-surface-inset);
  color: var(--bt-muted);
}

/* CTA */
.bt-product-actions {
  display: flex;
  gap: var(--bt-space-2);
}

.bt-btn-cart {
  flex: 1;
  background: var(--bt-primary);
  color: #ffffff;
  border: 1px solid var(--bt-primary);
  border-radius: var(--bt-radius-pill);
  padding: 0 1rem;
  font-weight: 600;
  font-size: var(--bt-text-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  transition: background var(--bt-transition-fast), transform 0.15s ease;
  min-height: 40px;
  letter-spacing: -0.01em;
}
.bt-btn-cart:hover {
  background: var(--bt-primary-hover);
  border-color: var(--bt-primary-hover);
}
.bt-btn-cart:active {
  transform: scale(0.98);
}



.bt-btn-cart:disabled,
.bt-btn-cart.disabled {
  background: var(--bt-surface-inset);
  border-color: var(--bt-border);
  color: var(--bt-muted);
  cursor: not-allowed;
  transform: none;
}

.bt-btn-view {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: var(--bt-radius-md);
  border: 1.5px solid var(--bt-border);
  background: transparent;
  color: var(--bt-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all var(--bt-transition-fast);
}

.bt-btn-view:hover {
  border-color: var(--bt-text);
  color: var(--bt-text);
  background: var(--bt-surface-subtle);
}

/* Product Grid */
.bt-product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--bt-space-4);
}

@media (max-width: 1200px) {
  .bt-product-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .bt-product-grid { grid-template-columns: repeat(2, 1fr); gap: var(--bt-space-3); }
}
@media (max-width: 440px) {
  .bt-product-grid { gap: var(--bt-space-2); }
}

/* Legacy aliases for PLP */
.products-grid {
  display: grid !important;
  grid-template-columns: repeat(4, 1fr) !important;
  gap: var(--bt-space-4) !important;
}
@media (max-width: 1200px) { .products-grid { grid-template-columns: repeat(3, 1fr) !important; } }
@media (max-width: 900px)  { .products-grid { grid-template-columns: repeat(2, 1fr) !important; gap: var(--bt-space-3) !important; } }

.product-card {
  background: var(--bt-surface) !important;
  border: 1px solid var(--bt-border) !important;
  border-radius: var(--bt-radius-lg) !important;
  padding: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  position: relative !important;
  overflow: hidden !important;
  box-shadow: var(--bt-shadow-card) !important;
  transition: transform var(--bt-transition-base), box-shadow var(--bt-transition-base) !important;
  height: 100% !important;
}

.product-card:hover {
  transform: translateY(-4px) !important;
  box-shadow: var(--bt-shadow-card-hover) !important;
}

.product-media {
  position: relative !important;
  width: 100% !important;
  aspect-ratio: 1 / 1 !important;
  background: #fafafa !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: var(--bt-space-3) !important;
  overflow: hidden !important;
  text-decoration: none !important;
  border-radius: var(--bt-radius-lg) var(--bt-radius-lg) 0 0 !important;
}

.product-thumb {
  max-width: 100% !important;
  max-height: 100% !important;
  width: auto !important;
  height: auto !important;
  object-fit: contain !important;
  transition: transform 0.3s ease !important;
}

.product-card:hover .product-thumb {
  transform: scale(1.05) !important;
}

.product-title {
  font-size: var(--bt-text-sm) !important;
  font-weight: 600 !important;
  color: var(--bt-text) !important;
  line-height: 1.4 !important;
  margin: 0 0 var(--bt-space-2) 0 !important;
  display: -webkit-box !important;
  -webkit-line-clamp: 2 !important;
  -webkit-box-orient: vertical !important;
  overflow: hidden !important;
  min-height: 2.4em !important;
  letter-spacing: -0.01em !important;
}

.product-title a { color: inherit !important; text-decoration: none !important; }
.product-title a:hover { color: var(--bt-primary) !important; }

.product-category-name {
  font-size: 0.6875rem !important;
  font-weight: 600 !important;
  color: var(--bt-muted) !important;
  text-transform: uppercase !important;
  letter-spacing: 0.06em !important;
  margin-bottom: 4px !important;
}

.product-price-box {
  margin-top: auto !important;
  padding-top: var(--bt-space-2) !important;
  margin-bottom: var(--bt-space-2) !important;
}

.price-current {
  font-size: var(--bt-text-lg) !important;
  font-weight: 800 !important;
  color: var(--bt-text) !important;
  line-height: 1.1 !important;
  letter-spacing: -0.02em !important;
}

.price-old {
  font-size: var(--bt-text-xs) !important;
  color: var(--bt-faint) !important;
  text-decoration: line-through !important;
}

.price-kdv-info {
  font-size: 0.6875rem !important;
  color: var(--bt-faint) !important;
  margin-top: 2px !important;
}

.btn-add-cart {
  width: 100% !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 6px !important;
  padding: 0 1rem !important;
  border-radius: var(--bt-radius-md) !important;
  font-size: var(--bt-text-sm) !important;
  font-weight: 700 !important;
  background: var(--bt-primary) !important;
  color: #ffffff !important;
  border: 1.5px solid var(--bt-primary) !important;
  cursor: pointer !important;
  transition: all var(--bt-transition-fast) !important;
  min-height: 42px !important;
  letter-spacing: -0.01em !important;
}
.btn-add-cart:hover {
  background: var(--bt-primary-hover) !important;
  border-color: var(--bt-primary-hover) !important;
}

/* ==========================================================================
   PDP TABS
   ========================================================================== */
.pdp-tabs-header {
  display: flex;
  gap: var(--bt-space-2);
  border-bottom: 1.5px solid var(--bt-border);
  margin-bottom: var(--bt-space-6);
  flex-wrap: wrap;
}

.pdp-tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2.5px solid transparent;
  padding: 0.75rem 1.25rem;
  font-size: var(--bt-text-sm);
  font-weight: 600;
  color: var(--bt-muted);
  cursor: pointer;
  transition: all var(--bt-transition-fast);
  margin-bottom: -1.5px;
}

.pdp-tab-btn:hover { color: var(--bt-text); }
.pdp-tab-btn.active {
  color: var(--bt-primary);
  border-bottom-color: var(--bt-primary);
}

.pdp-tab-pane { display: none; line-height: 1.75; color: var(--bt-text); }
.pdp-tab-pane.active { display: block; }

/* ==========================================================================
   MOBILE STICKY CTA (Sadece <= 768px mobilde ve aktifken görünür)
   ========================================================================== */
.bt-mobile-sticky-cart {
  display: none !important;
}

@media (max-width: 768px) {
  .bt-mobile-sticky-cart {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--bt-border, #e2e8f0);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    padding: 0.65rem 1rem calc(0.65rem + env(safe-area-inset-bottom, 0px));
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    gap: 0.85rem;
    z-index: 950;
    transform: translateY(115%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  }

  .bt-mobile-sticky-cart.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .bt-sticky-cart-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
    flex: 1;
  }

  .bt-sticky-cart-img {
    width: 44px;
    height: 44px;
    min-width: 44px;
    max-width: 44px;
    max-height: 44px;
    border-radius: 8px;
    object-fit: contain;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    padding: 2px;
    display: block;
    flex-shrink: 0;
  }

  .bt-sticky-cart-text {
    min-width: 0;
    flex: 1;
    overflow: hidden;
  }

  .bt-sticky-cart-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: #0f172a;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.25;
    margin-bottom: 2px;
  }

  .bt-sticky-cart-price {
    font-size: 0.95rem;
    font-weight: 900;
    color: var(--bt-primary, #d12131);
    line-height: 1.1;
  }

  .bt-sticky-cart-btn {
    background: var(--bt-primary, #d12131);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 0.65rem 1.1rem;
    font-size: 0.85rem;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    white-space: nowrap;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(209, 33, 49, 0.25);
    flex-shrink: 0;
    transition: transform 0.1s ease, background 0.15s ease;
  }

  .bt-sticky-cart-btn:active {
    transform: scale(0.96);
  }
}

/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */
.d-none    { display: none !important; }
.d-block   { display: block !important; }
.d-flex    { display: flex !important; }
.d-grid    { display: grid !important; }

@media (min-width: 576px)  { .d-sm-block { display: block !important; } }
@media (min-width: 768px)  { .d-md-flex { display: flex !important; } .d-md-none { display: none !important; } }
@media (min-width: 992px)  { .d-lg-block { display: block !important; } .d-lg-flex { display: flex !important; } .d-lg-none { display: none !important; } }
@media (max-width: 991px)  { .d-lg-none-mobile { display: none !important; } }
@media (min-width: 1280px) { .d-xl-flex { display: flex !important; } }
@media (max-width: 767px)  { .d-none-mobile { display: none !important; } }

.text-muted  { color: var(--bt-muted) !important; }
.text-sm     { font-size: var(--bt-text-sm) !important; }
.text-xs     { font-size: var(--bt-text-xs) !important; }
.fw-700      { font-weight: 700 !important; }
.fw-800      { font-weight: 800 !important; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Section spacing utility */
.bt-section {
  padding: 4rem 0;
}
@media (max-width: 768px) {
  .bt-section { padding: 2.5rem 0; }
}

/* Card generic */
.bt-card {
  background: var(--bt-surface);
  border: 1px solid var(--bt-border);
  border-radius: var(--bt-radius-lg);
  box-shadow: var(--bt-shadow-card);
}