/* ─── Product Builder Styles ────────────────────────────────── *
 * 与 Contact 页现有设计系统一致：Slate 灰系 + var(--color-primary) 品牌绿    *
 * 用于 Product Brief Builder 交互面板                           *
 * 加载方式: <link href="/assets/css/product-builder.css">       *
 * ─────────────────────────────────────────────────────────── */

/* ═══ Main Container ═══ */
.builder-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.builder-header {
  margin-bottom: 0.25rem;
}
.builder-header h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #0f172a;
  margin: 0 0 0.25rem;
}
.builder-header p {
  font-size: 0.875rem;
  color: #64748b;
  margin: 0;
}
.dark .builder-header h3 {
  color: #f1f5f9;
}
.dark .builder-header p {
  color: #94a3b8;
}

.builder-main {
  display: flex;
  gap: 1.5rem;
}
.builder-options {
  flex: 3;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.builder-sidebar {
  flex: 1;
  min-width: 220px;
  max-width: 300px;
  flex-shrink: 0;
}
/* PC: options ~75%, sidebar ~25% via flex ratio */

/* ═══ Section Labels ═══ */
.builder-label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #334155;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.dark .builder-label {
  color: #94a3b8;
}
.builder-label .material-symbols-outlined {
  font-size: 1rem;
  color: var(--color-primary);
}

/* ═══ Mode Cards ═══ */
.mode-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}
.mode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.75rem 0.5rem;
  border: 2px solid #e2e8f0;
  border-radius: 0.75rem;
  background: #fff;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  min-height: 80px;
}
.dark .mode-card {
  background: #1e293b;
  border-color: #334155;
}
.mode-card:hover {
  border-color: var(--color-primary);
  border-color: rgba(8, 145, 178, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}
.mode-card .mode-icon {
  font-size: 1.5rem;
  color: #64748b;
  transition: color 0.2s;
}
.dark .mode-card .mode-icon {
  color: #94a3b8;
}
.mode-card .mode-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.2;
}
.dark .mode-card .mode-title {
  color: #f1f5f9;
}
.mode-card .mode-subtitle {
  font-size: 0.6875rem;
  color: #64748b;
  text-align: center;
  line-height: 1.3;
}
.dark .mode-card .mode-subtitle {
  color: #94a3b8;
}

/* Selected state */
.mode-card.selected {
  border-color: var(--color-primary);
  background: rgba(8, 145, 178, 0.05);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(8, 145, 178, 0.12);
}
.dark .mode-card.selected {
  background: rgba(8, 145, 178, 0.12);
}
.mode-card.selected .mode-icon {
  color: var(--color-primary);
}
.mode-card.selected:after {
  content: "✓";
  position: absolute;
  top: 4px;
  right: 6px;
  font-size: 0.75rem;
  font-weight: 900;
  color: var(--color-primary);
  background: rgba(8, 145, 178, 0.1);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Mode card description (shown after selection) */
.mode-card-desc {
  display: none;
  font-size: 0.75rem;
  color: #64748b;
  line-height: 1.4;
  padding: 0.5rem 0.625rem;
  margin-top: 0.25rem;
  background: #f8fafc;
  border-radius: 0.5rem;
  border: 1px solid #e2e8f0;
}
.dark .mode-card-desc {
  background: #0f172a;
  color: #94a3b8;
  border-color: #334155;
}
.mode-card.selected + .mode-card-desc {
  display: block;
}

/* ═══ Category Tags ═══ */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.375rem;
}
.category-tag {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem 0.5rem;
  border: 1.5px solid #e2e8f0;
  border-radius: 0.5rem;
  background: #fff;
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 0.75rem;
  font-weight: 600;
  color: #334155;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
.dark .category-tag {
  background: #1e293b;
  border-color: #334155;
  color: #cbd5e1;
}
.category-tag:hover {
  border-color: var(--color-primary);
  opacity: 0.8;
}
.category-tag.selected {
  background: rgba(8, 145, 178, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.dark .category-tag.selected {
  background: rgba(8, 145, 178, 0.15);
  color: #4ade80;
}
.category-tag .cat-emoji {
  font-size: 1rem;
  line-height: 1;
}
.category-tag-skip {
  display: inline-block;
  font-size: 0.75rem;
  color: #94a3b8;
  cursor: pointer;
  margin-top: 0.375rem;
  text-decoration: underline;
}
.category-tag-skip:hover {
  color: #64748b;
}

/* ═══ Scale Slider ═══ */
.scale-slider-wrap {
  position: relative;
  padding: 0.75rem 0 0.25rem;
}
.scale-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: #e2e8f0;
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}
.dark .scale-slider {
  background: #334155;
}
.scale-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  cursor: pointer;
  transition: transform 0.15s;
}
.scale-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
.scale-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  cursor: pointer;
}
.scale-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 0.375rem;
}
.scale-label {
  font-size: 0.625rem;
  color: #94a3b8;
  text-align: center;
  cursor: pointer;
  transition: color 0.15s;
}
.scale-label.active {
  color: var(--color-primary);
  font-weight: 700;
}
.scale-value {
  text-align: center;
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-top: 0.25rem;
}

/* ═══ Timeline Cards ═══ */
.timeline-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.375rem;
}
.timeline-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.125rem;
  padding: 0.5rem 0.25rem;
  border: 1.5px solid #e2e8f0;
  border-radius: 0.5rem;
  background: #fff;
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 0.75rem;
  font-weight: 600;
  color: #334155;
  -webkit-tap-highlight-color: transparent;
}
.dark .timeline-card {
  background: #1e293b;
  border-color: #334155;
  color: #cbd5e1;
}
.timeline-card:hover {
  border-color: var(--color-primary);
  opacity: 0.8;
}
.timeline-card.selected {
  background: rgba(8, 145, 178, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.dark .timeline-card.selected {
  background: rgba(8, 145, 178, 0.15);
  color: #4ade80;
}
.timeline-card .tl-icon {
  font-size: 1.125rem;
}

/* ═══ Brief Panel (Sidebar) ═══ */
.brief-panel {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 0.75rem;
  padding: 1rem;
  position: sticky;
  top: 1rem;
  transition: all 0.3s ease;
}
.dark .brief-panel {
  background: #0f172a;
  border-color: #334155;
}
.brief-panel-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.brief-summary {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.brief-summary-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: #334155;
  padding: 0.375rem 0.5rem;
  background: #fff;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
}
.dark .brief-summary-item {
  background: #1e293b;
  color: #cbd5e1;
}
.brief-summary-item .bs-icon {
  font-size: 1rem;
  color: var(--color-primary);
  width: 1.25rem;
  text-align: center;
}
.brief-empty-state {
  font-size: 0.8125rem;
  color: #94a3b8;
  text-align: center;
  padding: 1rem 0;
}
.brief-empty-state .material-symbols-outlined {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 0.25rem;
  color: #cbd5e1;
}

/* Smart Match */
.brief-match {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid #e2e8f0;
}
.dark .brief-match {
  border-color: #334155;
}
.brief-match-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: 0.375rem;
}
.brief-match-text {
  font-size: 0.75rem;
  color: #475569;
  line-height: 1.5;
}
.dark .brief-match-text {
  color: #94a3b8;
}
.brief-match-link {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 0.375rem;
  text-decoration: underline;
}
.brief-match-link:hover {
  color: var(--color-primary-hover);
}

/* Brief Score */
.brief-score-wrap {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid #e2e8f0;
}
.dark .brief-score-wrap {
  border-color: #334155;
}
.brief-score-bar {
  height: 4px;
  background: #e2e8f0;
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 0.375rem;
}
.brief-score-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width 0.4s ease;
}
.brief-score-text {
  font-size: 0.6875rem;
  color: #94a3b8;
}
.brief-score-text strong {
  color: var(--color-primary);
}

/* ═══ Contact Row ═══ */
.contact-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.625rem;
  margin-top: 0.25rem;
}
.contact-row-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.625rem;
}
.contact-field {
}
.contact-field label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  color: #334155;
  margin-bottom: 0.25rem;
}
.dark .contact-field label {
  color: #94a3b8;
}
.contact-field input,
.contact-field select {
  width: 100%;
  padding: 0.5rem 0.625rem;
  font-size: 0.8125rem;
  border: 1px solid #e2e8f0;
  border-radius: 0.5rem;
  background: #fff;
  color: #0f172a;
  outline: none;
  transition: border-color 0.15s;
  box-sizing: border-box;
}
.dark .contact-field input,
.dark .contact-field select {
  background: #1e293b;
  border-color: #334155;
  color: #f1f5f9;
}
.contact-field input:focus,
.contact-field select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}
.contact-field select {
  cursor: pointer;
}
.contact-divider {
  border: none;
  border-top: 1px solid #e2e8f0;
  margin: 1rem 0;
}
.dark .contact-divider {
  border-color: #334155;
}

/* ═══ Prompt Chips ═══ */
.prompt-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-bottom: 0.5rem;
}
.prompt-chip {
  padding: 0.25rem 0.625rem;
  border: 1px solid #e2e8f0;
  border-radius: 1rem;
  font-size: 0.75rem;
  color: #475569;
  background: #fff;
  cursor: pointer;
  transition: all 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
}
.dark .prompt-chip {
  background: #1e293b;
  border-color: #334155;
  color: #94a3b8;
}
.prompt-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(8, 145, 178, 0.04);
}
.prompt-chip.used {
  opacity: 0.4;
  pointer-events: none;
}

/* ═══ Submit Button ═══ */
.builder-submit {
  width: 100%;
  padding: 0.875rem;
  margin-top: 0.75rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 0.75rem;
  font-size: 0.9375rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.builder-submit:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 4px 16px rgba(8, 145, 178, 0.25);
  transform: translateY(-1px);
}
.builder-submit:active {
  transform: translateY(0);
}
.builder-submit:disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* ═══ Success State ═══ */
.builder-success {
  display: none;
  text-align: center;
  padding: 1.5rem 1rem;
}
.builder-success.visible {
  display: block;
  animation: fadeInUp 0.4s ease;
}
.builder-success .check-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(8, 145, 178, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
}
.builder-success .check-circle .material-symbols-outlined {
  font-size: 1.75rem;
  color: var(--color-primary);
}
.builder-success h4 {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0 0 0.25rem;
}
.builder-success p {
  font-size: 0.8125rem;
  color: #64748b;
  margin: 0 0 1rem;
}
.builder-success-steps {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}
.builder-success-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}
.builder-success-step .step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.builder-success-step .step-label {
  font-size: 0.6875rem;
  color: #64748b;
  max-width: 60px;
  text-align: center;
  line-height: 1.3;
}
.builder-success-links {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
.builder-success-links a {
  font-size: 0.75rem;
  padding: 0.375rem 0.75rem;
  border: 1px solid #e2e8f0;
  border-radius: 0.5rem;
  color: #475569;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.15s;
}
.builder-success-links a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ═══ Animations ═══ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20%,
  60% {
    transform: translateX(-4px);
  }
  40%,
  80% {
    transform: translateX(4px);
  }
}
.field-error {
  border-color: #ef4444 !important;
  animation: shake 0.4s ease;
}
.field-error-msg {
  display: block;
  font-size: 0.6875rem;
  color: #ef4444;
  margin-top: 0.125rem;
}

/* ═══ Mobile / Tablet Overrides ═══ */
@media (max-width: 1279px) {
  .builder-main {
    flex-direction: column;
  }
  .builder-sidebar {
    width: 100%;
  }
  .brief-panel {
    position: static;
  }
  .mode-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-row-2 {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 767px) {
  .mode-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .timeline-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-row {
    grid-template-columns: 1fr;
  }
  .prompt-chips {
    gap: 0.25rem;
  }
  .prompt-chip {
    font-size: 0.6875rem;
    padding: 0.2rem 0.5rem;
  }
}