/* Grandberg Pizza Customizer — design system */

:root {
  --gb-bg: #fafafa;
  --gb-surface: #ffffff;
  --gb-surface-alt: #f4f4f5;
  --gb-border: #e4e4e7;
  --gb-text: #18181b;
  --gb-text-muted: #71717a;
  --gb-primary: #c8102e;        /* Grandberg red */
  --gb-primary-dark: #9a0c23;
  --gb-primary-light: #ffe4e9;
  --gb-accent: #f59e0b;
  --gb-success: #16a34a;
  --gb-danger: #dc2626;
  --gb-radius: 12px;
  --gb-radius-sm: 8px;
  --gb-shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.06);
  --gb-shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.05);
  --gb-shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.06);
  --gb-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--gb-font);
  background: var(--gb-bg);
  color: var(--gb-text);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

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

img { max-width: 100%; display: block; }

button { font-family: inherit; cursor: pointer; }

/* ---------------- Layout ---------------- */
.gb-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.gb-header {
  background: var(--gb-surface);
  border-bottom: 1px solid var(--gb-border);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(8px);
}
.gb-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.gb-logo {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--gb-text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.gb-logo-mark {
  width: 36px; height: 36px;
  background: var(--gb-primary);
  color: #fff;
  border-radius: 10px;
  display: grid; place-items: center;
  font-size: 18px;
  font-weight: 800;
}
.gb-nav { display: flex; align-items: center; gap: 28px; }
.gb-nav a {
  color: var(--gb-text);
  font-weight: 500;
  font-size: 15px;
}
.gb-nav a:hover { color: var(--gb-primary); }

.gb-lang-switch {
  display: flex;
  border: 1px solid var(--gb-border);
  border-radius: 999px;
  overflow: hidden;
  font-size: 13px;
  font-weight: 600;
}
.gb-lang-switch a {
  padding: 6px 12px;
  color: var(--gb-text-muted);
}
.gb-lang-switch a.active {
  background: var(--gb-text);
  color: #fff;
}

.gb-cart-btn {
  position: relative;
  background: var(--gb-text);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.gb-cart-badge {
  background: var(--gb-primary);
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 12px;
}

/* ---------------- Hero ---------------- */
.gb-hero {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, #fff 0%, var(--gb-bg) 100%);
}
.gb-hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}
.gb-hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 20px;
}
.gb-hero-title em {
  font-style: normal;
  color: var(--gb-primary);
}
.gb-hero-sub {
  font-size: 18px;
  color: var(--gb-text-muted);
  margin: 0 0 32px;
  max-width: 520px;
}
.gb-features {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 32px;
}
.gb-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--gb-text-muted);
}
.gb-feature-dot {
  width: 8px; height: 8px;
  background: var(--gb-primary);
  border-radius: 50%;
}

.gb-hero-visual {
  aspect-ratio: 1;
  background: var(--gb-surface);
  border-radius: 24px;
  box-shadow: var(--gb-shadow-lg);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.gb-hero-visual::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: radial-gradient(circle, var(--gb-primary-light) 0%, transparent 60%);
  z-index: 0;
}
.gb-hero-visual-inner {
  position: relative;
  z-index: 1;
  font-size: 120px;
}

/* ---------------- Buttons ---------------- */
.gb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--gb-radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 15px;
  transition: all .15s ease;
  text-decoration: none;
}
.gb-btn-primary {
  background: var(--gb-primary);
  color: #fff;
}
.gb-btn-primary:hover {
  background: var(--gb-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--gb-shadow);
}
.gb-btn-outline {
  background: transparent;
  border-color: var(--gb-border);
  color: var(--gb-text);
}
.gb-btn-outline:hover { background: var(--gb-surface-alt); }
.gb-btn-ghost {
  background: transparent;
  color: var(--gb-text-muted);
}
.gb-btn-ghost:hover { color: var(--gb-text); }
.gb-btn-block { width: 100%; }
.gb-btn-lg { padding: 16px 32px; font-size: 16px; }
.gb-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------------- Steps ---------------- */
.gb-stepper {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 0 auto 40px;
  flex-wrap: wrap;
  max-width: 800px;
}
.gb-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--gb-surface);
  border: 1px solid var(--gb-border);
  font-size: 13px;
  font-weight: 600;
  color: var(--gb-text-muted);
}
.gb-step.active {
  background: var(--gb-text);
  color: #fff;
  border-color: var(--gb-text);
}
.gb-step.done {
  background: var(--gb-primary-light);
  color: var(--gb-primary-dark);
  border-color: var(--gb-primary-light);
}
.gb-step-num {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: grid; place-items: center;
  font-size: 12px;
}
.gb-step:not(.active) .gb-step-num {
  background: var(--gb-surface-alt);
}

/* ---------------- Section ---------------- */
.gb-section {
  padding: 60px 0;
}
.gb-section-head {
  margin-bottom: 32px;
}
.gb-section-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.gb-section-intro {
  color: var(--gb-text-muted);
  font-size: 16px;
  margin: 0;
}

/* ---------------- Box grid ---------------- */
.gb-box-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.gb-box-card {
  background: var(--gb-surface);
  border: 2px solid var(--gb-border);
  border-radius: var(--gb-radius);
  padding: 20px;
  cursor: pointer;
  transition: all .15s ease;
  position: relative;
}
.gb-box-card:hover {
  border-color: var(--gb-text);
  transform: translateY(-2px);
  box-shadow: var(--gb-shadow);
}
.gb-box-card.selected {
  border-color: var(--gb-primary);
  background: linear-gradient(180deg, var(--gb-primary-light) 0%, #fff 100%);
}
.gb-box-card-img {
  aspect-ratio: 1;
  background: var(--gb-surface-alt);
  border-radius: var(--gb-radius-sm);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  font-size: 48px;
  overflow: hidden;
}
.gb-box-card-img img { width: 80%; height: 80%; object-fit: contain; }
.gb-box-card-name {
  font-weight: 700;
  font-size: 16px;
  margin: 0 0 4px;
}
.gb-box-card-size {
  color: var(--gb-text-muted);
  font-size: 13px;
  margin-bottom: 12px;
}
.gb-box-card-price {
  font-size: 22px;
  font-weight: 800;
  color: var(--gb-text);
}
.gb-box-card-price small {
  font-size: 13px;
  font-weight: 500;
  color: var(--gb-text-muted);
}
.gb-box-card-min {
  margin-top: 8px;
  font-size: 12px;
  color: var(--gb-text-muted);
}
.gb-box-card .gb-selected-badge {
  position: absolute;
  top: 12px; right: 12px;
  background: var(--gb-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  display: none;
}
.gb-box-card.selected .gb-selected-badge { display: block; }

/* ---------------- Designer ---------------- */
.gb-designer {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 32px;
  align-items: flex-start;
}
.gb-canvas-wrap {
  background: var(--gb-surface);
  border: 1px solid var(--gb-border);
  border-radius: var(--gb-radius);
  padding: 24px;
  box-shadow: var(--gb-shadow-sm);
}
.gb-canvas-stage {
  position: relative;
  background: #f4f4f5;
  border-radius: var(--gb-radius-sm);
  overflow: hidden;
  aspect-ratio: 1;
  max-width: 560px;
  margin: 0 auto;
  border: 1px solid var(--gb-border);
}
.gb-canvas-stage .canvas-container {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
}
.gb-canvas-stage .canvas-container canvas,
.gb-canvas-stage canvas {
  position: absolute !important;
  left: 0 !important;
  top: 0 !important;
  width: 100% !important;
  height: 100% !important;
}
.gb-canvas-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  justify-content: center;
}
.gb-tool-btn {
  background: var(--gb-surface-alt);
  border: 1px solid var(--gb-border);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--gb-text);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.gb-tool-btn:hover {
  background: var(--gb-text);
  color: #fff;
  border-color: var(--gb-text);
}

/* ---------------- Designer sidebar ---------------- */
.gb-side-panel {
  background: var(--gb-surface);
  border: 1px solid var(--gb-border);
  border-radius: var(--gb-radius);
  padding: 24px;
  position: sticky;
  top: 96px;
}
.gb-side-panel h3 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gb-text-muted);
  margin: 0 0 12px;
  font-weight: 700;
}
.gb-side-panel + .gb-side-panel { margin-top: 16px; }

.gb-upload-zone {
  border: 2px dashed var(--gb-border);
  border-radius: var(--gb-radius-sm);
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  transition: all .15s ease;
  background: var(--gb-surface-alt);
}
.gb-upload-zone:hover, .gb-upload-zone.drag {
  border-color: var(--gb-primary);
  background: var(--gb-primary-light);
}
.gb-upload-zone-icon {
  font-size: 32px;
  margin-bottom: 8px;
  color: var(--gb-text-muted);
}
.gb-upload-zone p {
  margin: 0;
  font-size: 14px;
  color: var(--gb-text);
  font-weight: 500;
}
.gb-upload-zone small {
  display: block;
  margin-top: 6px;
  color: var(--gb-text-muted);
  font-size: 12px;
}
.gb-upload-tip {
  margin-top: 12px;
  font-size: 12px;
  color: var(--gb-text-muted);
  background: var(--gb-surface-alt);
  border-radius: 6px;
  padding: 10px 12px;
}

.gb-qty-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 12px 0;
}
.gb-qty-input {
  flex: 1;
  border: 1px solid var(--gb-border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  font-family: inherit;
  width: 100%;
}
.gb-qty-btn {
  width: 40px; height: 40px;
  border-radius: 8px;
  border: 1px solid var(--gb-border);
  background: var(--gb-surface);
  font-size: 20px;
  font-weight: 600;
}
.gb-qty-btn:hover { background: var(--gb-surface-alt); }

.gb-summary {
  border-top: 1px solid var(--gb-border);
  margin-top: 16px;
  padding-top: 16px;
}
.gb-summary-row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--gb-text-muted);
  margin-bottom: 8px;
}
.gb-summary-row.total {
  font-size: 18px;
  font-weight: 800;
  color: var(--gb-text);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--gb-border);
}

/* ---------------- Forms ---------------- */
.gb-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.gb-form-grid.cols-3 { grid-template-columns: 2fr 1fr 1fr; }
.gb-field { display: flex; flex-direction: column; gap: 6px; }
.gb-field.span-2 { grid-column: span 2; }
.gb-field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--gb-text);
}
.gb-field label .req { color: var(--gb-primary); }
.gb-input, .gb-textarea, .gb-select {
  border: 1px solid var(--gb-border);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  background: var(--gb-surface);
  color: var(--gb-text);
  width: 100%;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.gb-input:focus, .gb-textarea:focus, .gb-select:focus {
  outline: none;
  border-color: var(--gb-primary);
  box-shadow: 0 0 0 3px var(--gb-primary-light);
}
.gb-input.error, .gb-textarea.error { border-color: var(--gb-danger); }
.gb-error-msg { color: var(--gb-danger); font-size: 12px; }

.gb-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  cursor: pointer;
}
.gb-checkbox input { margin-top: 3px; }

/* ---------------- Cart / checkout ---------------- */
.gb-checkout-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 32px;
  align-items: flex-start;
}
.gb-card {
  background: var(--gb-surface);
  border: 1px solid var(--gb-border);
  border-radius: var(--gb-radius);
  padding: 28px;
  box-shadow: var(--gb-shadow-sm);
}
.gb-card-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 20px;
}
.gb-card + .gb-card { margin-top: 16px; }

.gb-cart-item {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--gb-border);
}
.gb-cart-item:last-child { border-bottom: none; }
.gb-cart-item-img {
  width: 80px; height: 80px;
  background: var(--gb-surface-alt);
  border-radius: 8px;
  overflow: hidden;
}
.gb-cart-item-img img { width: 100%; height: 100%; object-fit: contain; }
.gb-cart-item-name { font-weight: 600; }
.gb-cart-item-meta {
  font-size: 13px;
  color: var(--gb-text-muted);
  margin-top: 4px;
}
.gb-cart-item-price {
  font-weight: 700;
  font-size: 16px;
}
.gb-remove-btn {
  background: none;
  border: none;
  color: var(--gb-text-muted);
  font-size: 12px;
  margin-top: 4px;
  padding: 0;
}
.gb-remove-btn:hover { color: var(--gb-danger); }

/* ---------------- Footer ---------------- */
.gb-footer {
  background: var(--gb-text);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 32px;
  margin-top: 80px;
  font-size: 14px;
}
.gb-footer a { color: rgba(255,255,255,0.8); }
.gb-footer a:hover { color: #fff; }
.gb-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.gb-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ---------------- Toast ---------------- */
.gb-toast {
  position: fixed;
  bottom: 24px; right: 24px;
  background: var(--gb-text);
  color: #fff;
  padding: 14px 22px;
  border-radius: 8px;
  box-shadow: var(--gb-shadow-lg);
  font-size: 14px;
  z-index: 100;
  transform: translateY(100px);
  opacity: 0;
  transition: all .25s ease;
}
.gb-toast.show { transform: translateY(0); opacity: 1; }
.gb-toast.error { background: var(--gb-danger); }
.gb-toast.success { background: var(--gb-success); }

/* ---------------- Responsive ---------------- */
@media (max-width: 960px) {
  .gb-hero-grid, .gb-designer, .gb-checkout-grid {
    grid-template-columns: 1fr;
  }
  .gb-side-panel { position: static; }
  .gb-footer-grid { grid-template-columns: 1fr 1fr; }
  .gb-form-grid, .gb-form-grid.cols-3 { grid-template-columns: 1fr; }
  .gb-field.span-2 { grid-column: auto; }
  .gb-nav { display: none; }
}
@media (max-width: 600px) {
  .gb-hero { padding: 48px 0 32px; }
  .gb-section { padding: 40px 0; }
  .gb-card { padding: 20px; }
  .gb-footer-grid { grid-template-columns: 1fr; }
}

/* ---------------- 3D Preview Modal ---------------- */
.p3d-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
}
.p3d-modal.show {
  opacity: 1;
  pointer-events: auto;
}
.p3d-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 15, 20, 0.7);
  backdrop-filter: blur(4px);
}
.p3d-dialog {
  position: relative;
  max-width: 1080px;
  width: calc(100% - 32px);
  height: calc(100vh - 80px);
  max-height: 800px;
  margin: 40px auto;
  background: var(--gb-surface);
  border-radius: 16px;
  box-shadow: var(--gb-shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.p3d-head {
  padding: 20px 24px;
  border-bottom: 1px solid var(--gb-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.p3d-title { font-weight: 700; font-size: 18px; }
.p3d-sub { font-size: 13px; color: var(--gb-text-muted); margin-top: 2px; }
.p3d-close {
  background: var(--gb-surface-alt);
  border: none;
  width: 36px; height: 36px;
  border-radius: 50%;
  font-size: 22px;
  color: var(--gb-text);
}
.p3d-close:hover { background: var(--gb-border); }
.p3d-stage {
  flex: 1;
  position: relative;
  background: linear-gradient(180deg, #fafafa 0%, #e4e4e7 100%);
  overflow: hidden;
}
.p3d-stage canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}
.p3d-stage canvas:active { cursor: grabbing; }
.p3d-hint {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.6);
  color: rgba(255,255,255,0.9);
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 999px;
  pointer-events: none;
}
.p3d-tools {
  padding: 14px 24px;
  border-top: 1px solid var(--gb-border);
  display: flex;
  gap: 8px;
  justify-content: center;
  background: var(--gb-surface-alt);
}

/* ---------------- Utility ---------------- */
.gb-hidden { display: none !important; }
.gb-text-center { text-align: center; }
.gb-mt-4 { margin-top: 32px; }