:root {
  --bg: #fbf8f1;
  --bg-soft: #f4efe4;
  --panel: rgba(255, 252, 247, 0.9);
  --panel-strong: #fffdfa;
  --ink: #181818;
  --muted: #6f6b63;
  --line: rgba(24, 24, 24, 0.08);
  --line-strong: rgba(24, 24, 24, 0.18);
  --accent: #efe7d7;
  --accent-strong: #dfd5c2;
  --shadow: 0 24px 60px rgba(79, 60, 39, 0.1);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.88), transparent 20%),
    radial-gradient(circle at top right, rgba(227, 219, 202, 0.42), transparent 25%),
    linear-gradient(180deg, #fffdf9 0%, var(--bg) 44%, var(--bg-soft) 100%);
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(75, 63, 50, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(75, 63, 50, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.25), transparent 80%);
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  max-width: 1480px;
  margin: 0 auto;
  padding: 28px 22px 56px;
}

.hero-panel,
.editor-panel,
.preview-panel,
.tips-card {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  margin-bottom: 24px;
  padding: 20px 24px;
  background:
    linear-gradient(145deg, rgba(255, 253, 248, 0.96), rgba(244, 239, 230, 0.92));
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: auto -80px -120px auto;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(227, 219, 202, 0.85), transparent 65%);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-panel h1 {
  max-width: none;
  margin: 0;
  font-family: "Iowan Old Style", "Baskerville", "Songti SC", "STSong", serif;
  font-size: clamp(28px, 2.8vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  white-space: nowrap;
}

.hero-text {
  max-width: 920px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.hero-badge {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
  position: relative;
  z-index: 1;
}

.hero-badge span,
.page-meta {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(24, 24, 24, 0.08);
  color: var(--muted);
  font-size: 13px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(480px, 620px) minmax(520px, 860px);
  gap: 22px;
  align-items: start;
  justify-content: space-between;
}

.editor-panel,
.preview-panel {
  padding: 24px;
  background: var(--panel);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
}

.preview-panel {
  min-height: 620px;
  max-width: 860px;
}

.preview-tools {
  margin-bottom: 16px;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid rgba(24, 24, 24, 0.08);
  background: rgba(255, 255, 255, 0.82);
}

.preview-tools-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.preview-tools-title {
  margin: 0;
  min-width: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--muted);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.panel-head h2 {
  margin: 0;
  font-size: 20px;
}

.field {
  display: grid;
  gap: 10px;
  margin-bottom: 16px;
}

.field-group {
  padding: 16px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(24, 24, 24, 0.08);
  scroll-margin-top: 20px;
}

.field-label {
  font-size: 14px;
  color: var(--muted);
}

.field-note {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid rgba(24, 24, 24, 0.1);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  padding: 16px 18px;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.field textarea {
  min-height: 360px;
  resize: vertical;
  line-height: 1.75;
}

.swatch-row {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  align-items: center;
  overflow-x: auto;
  padding-bottom: 2px;
}

.swatch-button {
  min-width: 78px;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(24, 24, 24, 0.16);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), var(--swatch));
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.swatch-button.active {
  border-color: rgba(24, 24, 24, 0.28);
  box-shadow: inset 0 0 0 1px rgba(24, 24, 24, 0.08);
}

.background-controls,
.background-status {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.slider-field {
  display: grid;
  grid-template-columns: auto minmax(180px, 320px) auto;
  align-items: center;
  gap: 12px;
  padding: 7px 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(24, 24, 24, 0.08);
}

.slider-inline-label {
  color: #666666;
  font-size: 13px;
  font-weight: 700;
}

.slider-field strong {
  color: var(--ink);
  font-size: 13px;
}

.slider-field input[type="range"] {
  width: 100%;
  padding: 0;
  accent-color: #1d1d1d;
  margin: 0;
}

.preview-slider {
  width: fit-content;
  justify-self: start;
}

.inline-field {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(24, 24, 24, 0.08);
  color: var(--muted);
  font-size: 13px;
}

.inline-field input[type="color"] {
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  background: transparent;
}

.upload-field {
  position: relative;
  overflow: hidden;
}

.upload-field input[type="file"] {
  max-width: 160px;
}

.background-status {
  justify-content: flex-start;
}

.background-status span {
  color: var(--muted);
  font-size: 13px;
}

.custom-color-button {
  min-width: 154px;
  min-height: 44px;
  padding: 0 12px 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-radius: 16px;
  border: 1px solid rgba(24, 24, 24, 0.18);
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.custom-color-chip {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(24, 24, 24, 0.18);
  overflow: hidden;
  background: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.custom-color-chip input[type="color"] {
  width: 42px;
  height: 42px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

.upload-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.upload-split-button {
  display: inline-flex;
  align-items: stretch;
  border-radius: 16px;
  border: 1px solid rgba(24, 24, 24, 0.18);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.92);
}

.upload-split-label,
.upload-split-action {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
}

.upload-split-label {
  color: #666666;
}

.upload-split-action {
  position: relative;
  border-left: 1px solid rgba(24, 24, 24, 0.18);
  color: var(--ink);
}

.upload-split-action input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.remove-button {
  min-height: 46px;
  padding: 0 18px;
  border-radius: 16px;
  border: 1px solid rgba(142, 142, 142, 0.34);
  background: rgba(255, 255, 255, 0.92);
  color: #9a9a9a;
  font-size: 14px;
  font-weight: 600;
}

.background-file-note {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.background-note {
  color: var(--muted);
  font-size: 13px;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: rgba(24, 24, 24, 0.22);
  background: #fffdfa;
  transform: translateY(-1px);
}

.action-row {
  display: flex;
  gap: 12px;
  margin: 22px 0 18px;
}

.primary-button,
.secondary-button,
.ghost-button,
.card-download {
  border: none;
  border-radius: 999px;
  min-height: 48px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 600;
}

.primary-button {
  background: linear-gradient(135deg, #1d1d1d 0%, #3d3d3d 100%);
  color: #fffdf9;
}

.secondary-button {
  background: rgba(223, 213, 194, 0.44);
  color: var(--ink);
}

.ghost-button,
.card-download {
  background: rgba(255, 255, 255, 0.74);
  color: var(--ink);
  border: 1px solid rgba(24, 24, 24, 0.08);
}

.ghost-button.slim {
  min-height: 40px;
  padding-inline: 14px;
  font-size: 13px;
}

.tips-card {
  padding: 18px;
  background: rgba(255, 253, 248, 0.88);
  border-radius: var(--radius-lg);
}

.tips-card h3 {
  margin: 0 0 12px;
  font-size: 16px;
}

.tips-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 280px));
  gap: 18px;
  max-width: 780px;
}

.preview-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(24, 24, 24, 0.08);
}

.preview-frame {
  border-radius: 22px;
  overflow: hidden;
  background: #f6f1e6;
  box-shadow: 0 24px 40px rgba(69, 53, 37, 0.12);
}

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

.preview-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.preview-label {
  font-size: 14px;
  color: var(--muted);
}

.empty-state {
  display: grid;
  place-items: center;
  min-height: 360px;
  border-radius: 26px;
  border: 1px dashed rgba(24, 24, 24, 0.12);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.42);
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 1fr;
    justify-content: stretch;
  }

  .hero-panel {
    grid-template-columns: 1fr;
  }

  .preview-tools-head {
    flex-direction: column;
  }

  .slider-shell {
    min-width: 0;
    width: 100%;
  }

  .hero-panel h1 {
    white-space: normal;
  }

  .hero-badge {
    justify-content: flex-start;
  }

  .preview-panel {
    max-width: none;
  }

  .swatch-row {
    flex-wrap: wrap;
    overflow-x: visible;
  }
}

@media (max-width: 640px) {
  .app-shell {
    padding-inline: 14px;
  }

  .hero-panel,
  .editor-panel,
  .preview-panel {
    padding: 18px;
    border-radius: 24px;
  }

  .action-row {
    flex-direction: column;
  }

  .preview-grid {
    grid-template-columns: 1fr;
  }
}