:root {
  --bg: #f6f2ec;
  --panel: #fffaf3;
  --ink: #2b221c;
  --accent: #0f6b6b;
  --accent-dark: #0a5151;
  --muted: #7a6a5f;
  --border: #e3d8cd;
  --shadow: rgba(26, 18, 12, 0.08);
  --mono: "Space Mono", "Menlo", "Consolas", monospace;
  --display: "Fraunces", "Times New Roman", serif;
  --sans: "Work Sans", "Arial", sans-serif;
}

/* 暗色主题 */
.dark-theme {
  --bg: #1a1a1a;
  --panel: #2d2d2d;
  --ink: #e0e0e0;
  --accent: #4ecdc4;
  --accent-dark: #3db3ab;
  --muted: #a0a0a0;
  --border: #404040;
  --shadow: rgba(0, 0, 0, 0.3);
}

.dark-theme .preview-body {
  background: #2d2d2d;
  color: #e0e0e0;
}

.dark-theme .preview-body pre {
  background: #3a3a3a;
}

.dark-theme .preview-body code {
  background: #3a3a3a;
}

.dark-theme textarea {
  background: #2d2d2d;
  color: #e0e0e0;
  border-color: #404040;
}

.dark-theme .share-result {
  background: #2d2d2d;
  border-color: #404040;
}

.dark-theme .ghost {
  color: var(--accent);
  border-color: var(--accent);
}

.dark-theme .ghost svg {
  stroke: var(--accent);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: radial-gradient(circle at top left, #faf5ed 0, transparent 45%),
    radial-gradient(circle at 30% 20%, #f1e5d8 0, transparent 50%),
    var(--bg);
  min-height: 100vh;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 36px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 8px;
}

h1 {
  font-family: var(--display);
  font-size: 38px;
  margin: 0 0 8px;
}

.sub {
  margin: 0;
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  box-shadow: 0 16px 40px var(--shadow);
}

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

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

textarea {
  width: 100%;
  min-height: 360px;
  padding: 16px;
  margin-top: 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 14px;
  background: #fff;
  color: var(--ink);
  outline: none;
  box-shadow: inset 0 1px 4px rgba(0, 0, 0, 0.04);
}

.preview-body {
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 20px;
  margin-top: 10px;
  min-height: 360px;
  overflow-wrap: anywhere;
  word-break: break-word;
  overflow-x: auto;
  max-width: 100%;
  box-sizing: border-box;
}

.preview-body h1,
.preview-body h2,
.preview-body h3 {
  font-family: var(--display);
  margin-top: 20px;
}

.preview-body pre {
  background: #f3ebe0;
  padding: 12px;
  border-radius: 10px;
  overflow-x: auto;
  max-width: 100%;
  word-wrap: break-word;
  white-space: pre-wrap;
}

.preview-body code {
  font-family: var(--mono);
  background: #f3ebe0;
  padding: 2px 6px;
  border-radius: 6px;
  word-wrap: break-word;
  max-width: 100%;
  overflow-wrap: break-word;
}

/* 行内代码块的特殊处理 */
.preview-body :not(pre) > code {
  display: inline-block;
  vertical-align: middle;
}

.primary,
.ghost {
  border: none;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 12px 24px rgba(15, 107, 107, 0.25);
}

.primary:hover {
  background: var(--accent-dark);
}

.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

/* 按钮内的 SVG 图标 */
.primary svg,
.ghost svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* 确保 SVG 图标颜色正确 */
.ghost svg {
  stroke: var(--accent);
}

.primary svg {
  stroke: #fff;
}

/* 只有图标的按钮 */
.primary:only-child,
.ghost:only-child {
  padding: 12px;
}

.share-result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #fff;
  flex-wrap: wrap;
}

.share-result > div {
  flex: 1;
  min-width: 0; /* 允许 flex 子元素缩小 */
}

.share-result #shareLink {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
  color: var(--accent);
  text-decoration: none;
  word-break: break-all;
}

@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }

  .app {
    padding: 20px 16px 40px;
    max-width: 100%;
    overflow-x: hidden;
  }

  .panel {
    padding: 14px;
    gap: 14px;
  }

  .share-result {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .share-result #shareLink {
    font-size: 14px;
  }

  textarea,
  .preview-body {
    min-height: 240px;
    padding: 16px;
  }

  /* 移动端预览区域优化 */
  .preview-body {
    font-size: 14px;
    line-height: 1.6;
    padding: 14px;
    overflow-x: hidden;
    overflow-y: auto;
    max-width: 100%;
  }

  .preview-body pre {
    padding: 10px;
    font-size: 12px;
    overflow-x: auto;
    max-width: 100%;
  }

  .preview-body code {
    font-size: 13px;
  }

  .preview-body h1 {
    font-size: 24px;
  }

  .preview-body h2 {
    font-size: 20px;
  }

  .preview-body h3 {
    font-size: 18px;
  }
}

/* 主题切换按钮 */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--panel);
  border: 2px solid var(--border);
  color: var(--ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 1000;
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px var(--shadow);
}

.theme-toggle .sun-icon,
.theme-toggle .moon-icon {
  width: 24px;
  height: 24px;
  transition: opacity 0.3s ease;
}

.dark-theme .theme-toggle .sun-icon {
  opacity: 0;
  position: absolute;
}

.dark-theme .theme-toggle .moon-icon {
  opacity: 1;
}

.light-theme .theme-toggle .sun-icon {
  opacity: 1;
}

.light-theme .theme-toggle .moon-icon {
  opacity: 0;
  position: absolute;
}

/* 语言选择器 */
.language-selector {
  position: fixed;
  top: 20px;
  right: 80px;
  padding: 10px 16px;
  border-radius: 24px;
  background: var(--panel);
  border: 2px solid var(--border);
  color: var(--ink);
  cursor: pointer;
  font-size: 14px;
  font-family: var(--sans);
  font-weight: 500;
  z-index: 999;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  outline: none;
  box-shadow: 0 2px 8px var(--shadow);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%232b221c' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 12px;
  padding-right: 36px;
  min-width: 120px;
}

.dark-theme .language-selector {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23e0e0e0' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
}

.language-selector:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--shadow);
  border-color: var(--accent);
}

.language-selector:focus {
  box-shadow: 0 0 0 3px var(--accent);
  border-color: var(--accent);
}

.dark-theme .language-selector {
  background: var(--panel);
  color: var(--ink);
  border-color: var(--border);
}

.dark-theme .language-selector:hover,
.dark-theme .language-selector:focus {
  border-color: var(--accent);
}

.dark-theme .language-selector option {
  background: var(--panel);
  color: var(--ink);
}

@media (max-width: 768px) {
  .language-selector {
    top: 80px;
    right: 20px;
    font-size: 13px;
    padding: 8px 14px;
    padding-right: 34px;
    min-width: 100px;
  }
}

/* 模态框 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal.hidden {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--panel);
  border-radius: 16px;
  padding: 24px;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 16px 40px var(--shadow);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-header h3 {
  margin: 0;
  font-size: 18px;
  color: var(--ink);
}

.close-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--ink);
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.close-btn:hover {
  background: var(--border);
}

/* 社交媒体按钮 */
.social-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.social-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--ink);
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s ease;
}

.social-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow);
}

.social-btn svg {
  width: 20px;
  height: 20px;
}

.social-btn.wechat:hover {
  border-color: #07c160;
  color: #07c160;
}

.social-btn.qq:hover {
  border-color: #12b7f5;
  color: #12b7f5;
}

.social-btn.weibo:hover {
  border-color: #e6162d;
  color: #e6162d;
}

.social-btn.twitter:hover {
  border-color: #1da1f2;
  color: #1da1f2;
}

/* 分享操作区域 */
.share-actions {
  display: flex;
  gap: 8px;
}

.header-actions {
  display: flex;
  gap: 8px;
}

/* 触摸优化 */
@media (hover: none) and (pointer: coarse) {
  .primary,
  .ghost,
  .social-btn {
    min-height: 44px;
    min-width: 44px;
  }

  .theme-toggle {
    width: 52px;
    height: 52px;
  }

  .social-btn svg {
    width: 22px;
    height: 22px;
  }
}