/*!
 * 在线拼豆图纸生成器 —— 自定义样式
 * 依赖 Bootstrap 5.3（本地 vendor/bootstrap.min.css）
 */

:root {
  --pd-brand: #4f46e5;
  --pd-brand-2: #ec4899;
  --pd-brand-3: #06b6d4;
  --pd-ink: #14181d;
  --pd-radius: 14px;
  --pd-shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
  --pd-shadow-sm: 0 4px 14px rgba(17, 24, 39, 0.06);
}

[data-bs-theme="dark"] {
  --pd-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  --pd-shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.35);
}

html,
body {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  overflow-x: hidden;
}

section {
  scroll-margin-top: 80px;
}

.site-header {
  backdrop-filter: saturate(160%) blur(10px);
  background-color: color-mix(in srgb, var(--bs-body-bg) 86%, transparent);
  border-bottom: 1px solid var(--bs-border-color-translucent);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--pd-brand), var(--pd-brand-2));
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3px;
  padding: 6px;
  flex: none;
}

.brand-mark span {
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
}

.brand-mark span:nth-child(2) {
  background: rgba(255, 255, 255, 0.72);
}

.brand-mark span:nth-child(3) {
  background: rgba(255, 255, 255, 0.6);
}

/* ---------------- Hero ---------------- */

.hero {
  position: relative;
  padding: 56px 0 40px;
  overflow: hidden;
  background-image:
    radial-gradient(circle at 12% 20%, rgba(79, 70, 229, 0.14), transparent 42%),
    radial-gradient(circle at 88% 8%, rgba(236, 72, 153, 0.14), transparent 40%),
    radial-gradient(rgba(120, 130, 150, 0.22) 1px, transparent 1px);
  background-size: auto, auto, 18px 18px;
  border-bottom: 1px solid var(--bs-border-color-translucent);
}

.hero h1 {
  font-weight: 800;
  letter-spacing: -0.5px;
  font-size: clamp(1.9rem, 4vw, 3rem);
}

.hero .lead {
  color: var(--bs-secondary-color);
  max-width: 56ch;
}

.gradient-text {
  background: linear-gradient(120deg, var(--pd-brand), var(--pd-brand-2) 55%, var(--pd-brand-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-badges .badge {
  font-weight: 500;
  padding: 0.45em 0.7em;
  border-radius: 999px;
  background: var(--bs-tertiary-bg);
  color: var(--bs-body-color);
  border: 1px solid var(--bs-border-color-translucent);
}

.hero-preview {
  border-radius: var(--pd-radius);
  border: 1px solid var(--bs-border-color-translucent);
  box-shadow: var(--pd-shadow);
  overflow: hidden;
  background: var(--bs-body-bg);
}

.hero-preview canvas {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------------- 上传区 ---------------- */

.drop-zone {
  border: 2px dashed var(--bs-border-color);
  border-radius: var(--pd-radius);
  padding: 18px;
  text-align: center;
  transition: all 0.18s ease;
  background: var(--bs-tertiary-bg);
  cursor: pointer;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--pd-brand);
  background: color-mix(in srgb, var(--pd-brand) 8%, var(--bs-body-bg));
}

.drop-zone .dz-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin: 0 auto 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--pd-brand), var(--pd-brand-2));
}

.sample-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ---------------- 卡片通用 ---------------- */

.tool-card {
  border: 1px solid var(--bs-border-color-translucent);
  border-radius: var(--pd-radius);
  box-shadow: var(--pd-shadow-sm);
  background: var(--bs-body-bg);
}

.tool-card > .card-header {
  background: transparent;
  border-bottom: 1px solid var(--bs-border-color-translucent);
  font-weight: 600;
}

.settings-sticky {
  position: sticky;
  top: 74px;
}

@media (max-width: 1199.98px) {
  .settings-sticky {
    position: static;
  }
}

.accordion-button {
  font-weight: 600;
  padding: 0.85rem 1rem;
}

.accordion-button:not(.collapsed) {
  background: color-mix(in srgb, var(--pd-brand) 8%, transparent);
  color: var(--bs-body-color);
  box-shadow: none;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
}

.form-range {
  margin-bottom: 0;
}

.hint {
  font-size: 0.75rem;
  color: var(--bs-secondary-color);
}

.value-chip {
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  background: var(--bs-tertiary-bg);
  border: 1px solid var(--bs-border-color-translucent);
}

/* ---------------- 预览区 ---------------- */

.preview-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--bs-border-color-translucent);
  background: var(--bs-tertiary-bg);
  border-radius: var(--pd-radius) var(--pd-radius) 0 0;
}

.tool-btn {
  width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  padding: 0;
}

.tool-btn.active {
  background: var(--pd-brand);
  border-color: var(--pd-brand);
  color: #fff;
}

.preview-wrap {
  position: relative;
  min-height: 340px;
  max-height: 72vh;
  overflow: auto;
  padding: 12px;
  background-color: var(--bs-tertiary-bg);
  background-image:
    linear-gradient(45deg, rgba(125, 135, 150, 0.09) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(125, 135, 150, 0.09) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(125, 135, 150, 0.09) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(125, 135, 150, 0.09) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

#previewStage {
  display: inline-block;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.16);
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
  line-height: 0;
}

#patternCanvas {
  display: block;
  touch-action: none;
  cursor: crosshair;
}

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 8px;
  color: var(--bs-secondary-color);
  background: color-mix(in srgb, var(--bs-body-bg) 78%, transparent);
  backdrop-filter: blur(2px);
}

.color-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.color-chip {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid rgba(0, 0, 0, 0.16);
  padding: 0;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

[data-bs-theme="dark"] .color-chip {
  border-color: rgba(255, 255, 255, 0.28);
}

.color-chip:hover {
  transform: translateY(-2px);
}

.color-chip.active {
  box-shadow: 0 0 0 2px var(--bs-body-bg), 0 0 0 4px var(--pd-brand);
}

.swatch {
  display: inline-block;
  width: 15px;
  height: 15px;
  border-radius: 4px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  vertical-align: -2px;
}

/* ---------------- 统计 ---------------- */

.stat-card {
  border: 1px solid var(--bs-border-color-translucent);
  border-radius: 12px;
  padding: 10px 12px;
  height: 100%;
  background: var(--bs-tertiary-bg);
}

.stat-card .label {
  font-size: 0.75rem;
  color: var(--bs-secondary-color);
}

.stat-card .value {
  font-weight: 700;
  font-size: 1.05rem;
  font-variant-numeric: tabular-nums;
}

#colorTableBody tr {
  cursor: pointer;
}

#colorTableBody tr:hover {
  background: var(--bs-tertiary-bg);
}

#colorTableBody td {
  vertical-align: middle;
  font-size: 0.875rem;
}

.table-scroll {
  max-height: 340px;
  overflow: auto;
}

/* ---------------- 弹窗内的颜色选择 ---------------- */

.palette-pick {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid var(--bs-border-color-translucent);
  cursor: pointer;
  margin: 0;
}

.palette-pick:hover {
  background: var(--bs-tertiary-bg);
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 6px;
  max-height: 52vh;
  overflow: auto;
}

.paint-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 6px;
  max-height: 56vh;
  overflow: auto;
}

.paint-pick {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid var(--bs-border-color-translucent);
  background: transparent;
  text-align: left;
  color: inherit;
}

.paint-pick:hover {
  border-color: var(--pd-brand);
}

.paint-pick span:last-child {
  flex: 1;
  min-width: 0;
}

/* ---------------- 内容区块 ---------------- */

.section-head h2 {
  font-weight: 700;
  letter-spacing: -0.3px;
}

/* ---------------- 内容页（功能/教程/色卡/常见问题） ---------------- */

.page-head {
  position: relative;
  padding: 34px 0 26px;
  border-bottom: 1px solid var(--bs-border-color-translucent);
  background-image:
    radial-gradient(circle at 10% 0%, rgba(79, 70, 229, 0.13), transparent 45%),
    radial-gradient(circle at 88% 10%, rgba(236, 72, 153, 0.12), transparent 42%),
    radial-gradient(rgba(120, 130, 150, 0.18) 1px, transparent 1px);
  background-size: auto, auto, 20px 20px;
}

.page-head h1 {
  font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  letter-spacing: -0.4px;
}

.page-head .lead {
  color: var(--bs-secondary-color);
  max-width: 70ch;
  margin-bottom: 0;
}

.breadcrumb {
  --bs-breadcrumb-divider: '›';
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
}

.breadcrumb a {
  color: var(--bs-secondary-color);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--bs-body-color);
}

.content-card {
  height: 100%;
  padding: 20px;
  border: 1px solid var(--bs-border-color-translucent);
  border-radius: var(--pd-radius);
  background: var(--bs-body-bg);
  box-shadow: var(--pd-shadow-sm);
}

.content-card h2,
.content-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.content-card p:last-child,
.content-card ul:last-child {
  margin-bottom: 0;
}

.check-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
  font-size: 0.92rem;
}

.check-list li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.4rem;
  color: var(--bs-body-color);
}

.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.42em;
  width: 0.55rem;
  height: 0.32rem;
  border-left: 2px solid var(--pd-brand);
  border-bottom: 2px solid var(--pd-brand);
  transform: rotate(-45deg);
}

.toc-nav {
  position: sticky;
  top: 84px;
  font-size: 0.9rem;
}

.toc-nav .toc-title {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--bs-secondary-color);
  margin-bottom: 0.5rem;
}

.toc-nav a {
  display: block;
  padding: 0.32rem 0.6rem;
  border-radius: 8px;
  border-left: 2px solid transparent;
  color: var(--bs-secondary-color);
  text-decoration: none;
}

.toc-nav a:hover {
  background: var(--bs-tertiary-bg);
  color: var(--bs-body-color);
}

.cta-band {
  padding: 24px;
  border: 1px solid var(--bs-border-color-translucent);
  border-radius: var(--pd-radius);
  background:
    linear-gradient(120deg, rgba(79, 70, 229, 0.12), rgba(236, 72, 153, 0.12)),
    var(--bs-body-bg);
}

.link-tile {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  height: 100%;
  padding: 14px 16px;
  border: 1px solid var(--bs-border-color-translucent);
  border-radius: var(--pd-radius);
  background: var(--bs-body-bg);
  text-decoration: none;
  color: inherit;
  transition: transform 0.14s ease, border-color 0.14s ease;
}

.link-tile:hover {
  transform: translateY(-2px);
  border-color: var(--pd-brand);
  color: inherit;
}

.link-tile-ico {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--pd-brand), var(--pd-brand-2));
}

.link-tile-title {
  display: block;
  font-weight: 600;
}

.link-tile-desc {
  display: block;
  font-size: 0.82rem;
  color: var(--bs-secondary-color);
}

.home-step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.home-step .num {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
  background: linear-gradient(135deg, var(--pd-brand), var(--pd-brand-3));
}

.prose h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 1.4rem 0 0.7rem;
}

.prose h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin: 1.1rem 0 0.5rem;
}

.prose p,
.prose li {
  color: var(--bs-body-color);
  font-size: 0.94rem;
}

.prose table {
  font-size: 0.9rem;
}

.kbd-inline {
  display: inline-block;
  padding: 0.05rem 0.35rem;
  font-size: 0.8rem;
  border-radius: 5px;
  border: 1px solid var(--bs-border-color);
  background: var(--bs-tertiary-bg);
  font-family: ui-monospace, Menlo, Consolas, monospace;
}

.faq-accordion .accordion-button {
  font-size: 0.98rem;
}

.faq-accordion .accordion-body {
  color: var(--bs-secondary-color);
  font-size: 0.92rem;
}

.site-footer {
  border-top: 1px solid var(--bs-border-color-translucent);
  background: var(--bs-tertiary-bg);
  color: var(--bs-secondary-color);
  font-size: 0.875rem;
  padding: 28px 0 22px;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--bs-tertiary-bg);
  border: 1px solid var(--bs-border-color-translucent);
  color: var(--bs-secondary-color);
}

/* ---------------- 打印 ---------------- */

#printRoot {
  display: none;
}

.print-page {
  padding: 0 0 8mm;
}

.print-page canvas {
  max-width: 100%;
  height: auto;
  display: block;
}

.print-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  margin-top: 6px;
  font-size: 11px;
  color: #333;
}

.print-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.print-legend-item i {
  width: 11px;
  height: 11px;
  display: inline-block;
  border: 1px solid rgba(0, 0, 0, 0.25);
}

@page {
  size: A4 portrait;
  margin: 10mm;
}

@media print {
  body > *:not(#printRoot) {
    display: none !important;
  }

  #printRoot {
    display: block !important;
    background: #fff;
    color: #000;
  }

  .print-page {
    break-after: page;
    page-break-after: always;
  }

  .print-page:last-child {
    break-after: auto;
    page-break-after: auto;
  }
}

@media (max-width: 575.98px) {
  .preview-wrap {
    padding: 8px;
    max-height: 60vh;
  }

  .hero {
    padding: 32px 0 26px;
  }
}