/* ═══════════════════════════════════════════════════════════
   sql2er
   依赖：assets/fonts/fonts.css + assets/base.css
═══════════════════════════════════════════════════════════ */

:root {
  --app-font: var(--font-heading-cn);
  --app-font-actual: var(--font-heading-cn); /* 动态覆盖 */
  --app-font-display: var(--font-display-cn);
  --app-font-display-actual: var(--font-display-cn); /* 动态覆盖 */
  --app-font-body: var(--font-body-cn);
  --app-font-body-actual: var(--font-body-cn); /* 动态覆盖 */
  --app-font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;

  --app-ink: var(--color-text-primary);
  --app-ink-2: var(--color-text-secondary);
  --app-ink-3: var(--color-text-muted);

  --app-bg: var(--color-bg-base);
  --app-bg-raised: var(--color-bg-raised);
  --app-bg-overlay: var(--color-bg-overlay);

  --app-border: var(--color-border-subtle);
  --app-border-strong: var(--color-border-default);

  --app-accent: var(--color-accent-orange);
  --app-accent-warm: var(--color-accent-warm);
}

* {
  outline: none;
}

body {
  background-color: var(--app-bg);
  color: var(--app-ink);
  font-family: var(--app-font-actual);
  font-size: var(--text-base);
  line-height: var(--leading-cn-normal);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}

/* 单一暖色晕染 + 角落冷色点缀，极克制 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(
      ellipse 60% 50% at 12% 0%,
      rgba(217, 119, 87, 0.09) 0%,
      transparent 60%
    ),
    radial-gradient(
      ellipse 45% 45% at 100% 100%,
      rgba(106, 155, 204, 0.06) 0%,
      transparent 55%
    );
}

::selection {
  background: var(--app-accent);
  color: #fff;
}

.app-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: clamp(32px, 4vw, 64px) clamp(24px, 4vw, 40px) clamp(32px, 4vw, 48px);
}

/* ═══════════════════════════════════════
   头部
═══════════════════════════════════════ */
.header {
  margin: 0 auto clamp(28px, 3.6vw, 48px);
  max-width: 860px;
  text-align: center;
  animation: fadeInDown 0.9s var(--ease-default);
}

.header-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--app-font);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--app-ink-2);
  margin-bottom: var(--space-4);
}

.header-eyebrow::before,
.header-eyebrow::after {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--app-border-strong);
}

.header h1 {
  font-family: var(--app-font-display-actual);
  font-weight: var(--weight-regular);
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  line-height: var(--leading-cn-tight);
  letter-spacing: -0.015em;
  color: var(--app-ink);
  margin: 0 0 var(--space-4) 0;
}

.header h1 em {
  font-style: normal;
  color: var(--app-accent-warm);
  font-weight: var(--weight-regular);
}

.header p {
  font-family: var(--app-font-body-actual);
  font-size: clamp(1rem, 1.15vw, 1.12rem);
  color: var(--app-ink-2);
  line-height: var(--leading-cn-loose);
  margin: 0 auto;
  max-width: 48em;
}

.header-hint {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--app-font) !important;
  font-size: var(--text-xs) !important;
  font-weight: var(--weight-medium);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--app-ink-3) !important;
  margin: var(--space-5) auto 0 !important;
  line-height: 1 !important;
}

.header-hint::before,
.header-hint::after {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--app-border-strong);
}

/* ═══════════════════════════════════════
   主布局
═══════════════════════════════════════ */
.main-content {
  display: grid;
  grid-template-columns: 440px 1fr;
  gap: clamp(20px, 2.4vw, 32px);
  align-items: stretch;
  animation: fadeInUp 0.9s var(--ease-default) 0.15s backwards;
}

/* ═══════════════════════════════════════
   卡片
═══════════════════════════════════════ */
.card {
  background: var(--app-bg-raised);
  border: 1px solid var(--app-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 2px 12px rgba(20, 20, 19, 0.05);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition:
    border-color var(--duration-normal) var(--ease-default),
    box-shadow var(--duration-normal) var(--ease-default);
}

.card:hover {
  border-color: var(--app-border-strong);
  box-shadow: 0 8px 28px rgba(20, 20, 19, 0.07);
}

.card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--app-border);
  background: var(--app-bg-overlay);
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 66px;
}

.card-title {
  font-family: var(--app-font-display);
  font-weight: var(--weight-medium);
  font-size: 1.18rem;
  color: var(--app-ink);
  letter-spacing: -0.01em;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title span {
  font-size: 1.2rem;
}

.card-content {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.inline-label {
  font-family: var(--app-font);
  font-size: var(--text-sm);
  color: var(--app-ink-2);
  letter-spacing: 0.01em;
}

/* ═══════════════════════════════════════
   输入框（textarea fallback）
═══════════════════════════════════════ */
.input-textarea {
  width: 100%;
  min-height: 480px;
  border: 1px solid var(--app-border);
  border-radius: var(--radius-md);
  padding: 18px;
  font-family: var(--app-font-mono);
  font-size: 13.5px;
  line-height: 1.65;
  background: var(--app-bg-overlay);
  color: var(--app-ink);
  resize: none;
  flex: 1;
  transition:
    border-color var(--duration-normal) var(--ease-default),
    box-shadow var(--duration-normal) var(--ease-default);
}

.input-textarea:focus {
  border-color: var(--app-accent);
  box-shadow: 0 0 0 3px rgba(217, 119, 87, 0.2);
}

/* ═══════════════════════════════════════
   按钮
═══════════════════════════════════════ */
.btn {
  height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font-family: var(--app-font);
  font-size: 0.92rem;
  font-weight: var(--weight-medium);
  letter-spacing: 0.01em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  white-space: nowrap;
  transition:
    transform var(--duration-fast) var(--ease-default),
    background var(--duration-normal) var(--ease-default),
    color var(--duration-normal) var(--ease-default),
    border-color var(--duration-normal) var(--ease-default),
    box-shadow var(--duration-normal) var(--ease-default);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-primary {
  background: var(--app-accent);
  color: #fff;
  box-shadow: 0 6px 18px rgba(217, 119, 87, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: var(--app-accent-warm);
  box-shadow: 0 10px 26px rgba(201, 100, 66, 0.38);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--app-ink);
  border-color: var(--app-border-strong);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: var(--app-bg-overlay);
  border-color: var(--app-ink);
}

.btn-secondary:active {
  transform: translateY(0);
  background: var(--app-bg-raised);
}

.btn-sm {
  height: 36px;
  padding: 0 16px;
  font-size: 0.82rem;
  width: auto;
}

.btn-accent {
  background: rgba(217, 119, 87, 0.08);
  color: var(--app-accent-warm);
  border: 1px solid rgba(217, 119, 87, 0.22);
}

.btn-accent:hover {
  background: rgba(217, 119, 87, 0.14);
  border-color: rgba(217, 119, 87, 0.38);
  transform: translateY(-1px);
}

.btn-accent:active {
  transform: translateY(0);
  background: rgba(217, 119, 87, 0.18);
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: auto;
}

.button-group .btn-primary {
  flex: 1 1 0;
  width: auto;
  min-width: 0;
  overflow: hidden;
}

.button-group .btn-secondary {
  flex: 1;
  min-width: 140px;
}

/* 主按钮标签在导出按钮展开时平滑收缩为短标签；
   切换动效与导出按钮的 .export-view 完全一致（同一组 transition） */
.btn-primary-label-stack {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  pointer-events: none;
  white-space: nowrap;
}
.btn-primary-label-stack .label-long,
.btn-primary-label-stack .label-short {
  transition:
    opacity 240ms ease,
    transform 340ms cubic-bezier(0.32, 0.72, 0, 1);
  will-change: opacity, transform;
}
.btn-primary-label-stack .label-short {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
/* 默认：长标签在位，短标签下移并透明 */
.btn-primary-label-stack .label-long {
  opacity: 1;
  transform: translateY(0);
}
.btn-primary-label-stack .label-short {
  opacity: 0;
  transform: translateY(6px);
}
/* compact：长标签下移并透明，短标签归位 */
.btn-primary-label-stack[data-compact="true"] .label-long {
  opacity: 0;
  transform: translateY(6px);
}
.btn-primary-label-stack[data-compact="true"] .label-short {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════
   ER 图示容器
═══════════════════════════════════════ */
.diagram-container {
  width: 100%;
  flex: 1;
  min-height: 600px;
  background-color: #ffffff;
  background-image: radial-gradient(
    rgba(20, 20, 19, 0.14) 1.5px,
    transparent 1.5px
  );
  background-size: 24px 24px;
  border: none;
  border-radius: 0;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(20, 20, 19, 0.02);
  transition: background-image var(--duration-normal) var(--ease-default);
}

.diagram-container.no-grid {
  background-image: none;
  background-color: #ffffff;
}

/* ═══════════════════════════════════════
   浮动按钮
═══════════════════════════════════════ */
.background-toggle,
.colorize-toggle,
.attrs-toggle {
  position: absolute;
  left: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--app-border);
  background: color-mix(in srgb, var(--app-bg-overlay) 92%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 8px rgba(20, 20, 19, 0.06);
  display: grid;
  place-items: center;
  cursor: pointer;
  z-index: 100;
  transition:
    transform var(--duration-fast) var(--ease-default),
    background var(--duration-normal) var(--ease-default),
    border-color var(--duration-normal) var(--ease-default),
    box-shadow var(--duration-normal) var(--ease-default);
}

.background-toggle {
  top: 16px;
}

.colorize-toggle {
  top: 64px;
}

.attrs-toggle {
  top: 112px;
}

.background-toggle:hover,
.colorize-toggle:hover,
.attrs-toggle:hover {
  transform: scale(1.06);
  border-color: var(--app-accent);
  box-shadow: 0 6px 16px rgba(20, 20, 19, 0.1);
}

.background-toggle:active,
.colorize-toggle:active,
.attrs-toggle:active {
  transform: scale(0.95);
}

.background-toggle i,
.colorize-toggle i,
.attrs-toggle i {
  font-size: 16px;
  color: var(--app-ink-2);
  transition: color var(--duration-fast) var(--ease-default);
}

.background-toggle:hover i,
.colorize-toggle:hover i,
.attrs-toggle:hover i {
  color: var(--app-accent-warm);
}

.colorize-toggle.active {
  background: linear-gradient(135deg, #dbeafe 0%, #f3e8ff 50%, #ffe4e6 100%);
  border-color: rgba(14, 165, 233, 0.3);
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.18);
}

.colorize-toggle.active i {
  color: #0ea5e9;
}

.colorize-toggle.active:hover {
  background: linear-gradient(135deg, #bfdbfe 0%, #e9d5ff 50%, #fecdd3 100%);
  border-color: rgba(14, 165, 233, 0.45);
}

.colorize-toggle.active:hover i {
  color: #0284c7;
}

.attrs-toggle,
.colorize-toggle {
  overflow: hidden;
}

.attrs-toggle::after,
.colorize-toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 28px;
  height: 2px;
  background: var(--app-ink-2);
  border-radius: 2px;
  transform: translate(-50%, -50%) rotate(-45deg) scaleX(0);
  transform-origin: center;
  transition:
    transform var(--duration-normal) var(--ease-default),
    background var(--duration-fast) var(--ease-default);
  pointer-events: none;
}

.attrs-toggle.active::after {
  transform: translate(-50%, -50%) rotate(-45deg) scaleX(1);
}

.colorize-toggle:not(.active)::after {
  transform: translate(-50%, -50%) rotate(-45deg) scaleX(1);
}

.attrs-toggle:hover::after,
.colorize-toggle:hover::after {
  background: var(--app-accent-warm);
}

/* ═══════════════════════════════════════
   字体选择器
═══════════════════════════════════════ */
.font-picker-wrap {
  position: absolute;
  top: 160px;
  left: 16px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.font-picker-label {
  font-family: var(--app-font-actual);
  font-size: 0.68rem;
  font-weight: var(--weight-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--app-ink-3);
  padding-left: 4px;
  user-select: none;
}

.font-picker-dropdown {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: color-mix(in srgb, var(--app-bg-overlay) 92%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--app-border);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 8px rgba(20, 20, 19, 0.06);
  overflow: hidden;
  padding: 3px;
  transition:
    border-color var(--duration-normal) var(--ease-default),
    box-shadow var(--duration-normal) var(--ease-default);
}

.font-picker-dropdown:hover {
  border-color: var(--app-border-strong);
  box-shadow: 0 4px 14px rgba(20, 20, 19, 0.1);
}

.font-pick-opt {
  width: 100%;
  height: 34px;
  padding: 0 12px;
  border: none;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: var(--weight-medium);
  color: var(--app-ink-2);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  transition:
    background var(--duration-fast) var(--ease-default),
    color var(--duration-fast) var(--ease-default),
    transform var(--duration-fast) var(--ease-default);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.font-pick-opt:hover {
  background: rgba(217, 119, 87, 0.08);
  color: var(--app-ink);
  transform: scale(1.02);
}

.font-pick-opt.is-active {
  background: var(--app-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(217, 119, 87, 0.25);
}

.font-pick-opt.is-active:hover {
  background: var(--app-accent-warm);
  color: #fff;
}

/* ═══════════════════════════════════════
   加载与错误
═══════════════════════════════════════ */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--app-bg-overlay) 78%, transparent);
  display: grid;
  place-items: center;
  z-index: 10;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(217, 119, 87, 0.18);
  border-top-color: var(--app-accent);
  border-radius: 50%;
  animation: spin 1s var(--ease-gentle) infinite;
}

.error-message {
  background: rgba(192, 69, 58, 0.08);
  color: var(--color-error);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(192, 69, 58, 0.22);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ═══════════════════════════════════════
   图例
═══════════════════════════════════════ */
.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--app-bg-overlay);
  border: 1px solid var(--app-border);
  border-radius: 999px;
  font-family: var(--app-font);
  font-size: 0.78rem;
  color: var(--app-ink-2);
  transition:
    color var(--duration-fast) var(--ease-default),
    border-color var(--duration-fast) var(--ease-default);
}

.legend-item:hover {
  color: var(--app-ink);
  border-color: var(--app-border-strong);
}

/* ═══════════════════════════════════════
   CodeMirror
═══════════════════════════════════════ */
.CodeMirror {
  height: 480px !important;
  font-family: var(--app-font-mono) !important;
  font-size: 13.5px;
  line-height: 1.65;
  background: var(--app-bg-overlay);
  border: none;
  border-radius: var(--radius-md);
  color: var(--app-ink);
  box-shadow: 0 0 0 1px var(--app-border);
  transition: box-shadow var(--duration-normal) var(--ease-default);
}

.CodeMirror.CodeMirror-focused {
  box-shadow:
    0 0 0 1.5px var(--app-accent),
    0 0 0 4.5px rgba(217, 119, 87, 0.22);
}

.CodeMirror-gutters {
  background: var(--app-bg-raised);
  border-right: 1px solid var(--app-border);
}

.CodeMirror-linenumber {
  color: var(--app-ink-3);
}

.CodeMirror-cursor {
  border-left: 1.5px solid var(--app-accent-warm) !important;
}

/* 自绘黑色 I-beam，规避 Windows + Chromium GPU 合成层下
   系统光标位图时黑时白的问题（白色主题缓存会在刷新后误取） */
.CodeMirror,
.CodeMirror-scroll,
.CodeMirror-lines,
.CodeMirror pre.CodeMirror-line,
.CodeMirror pre.CodeMirror-line-like {
  cursor:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='13' height='20' viewBox='0 0 13 20'><g fill='none' stroke-linecap='round'><g stroke='white' stroke-width='2.6'><line x1='6.5' y1='2.5' x2='6.5' y2='17.5'/><line x1='3.5' y1='2.75' x2='9.5' y2='2.75'/><line x1='3.5' y1='17.25' x2='9.5' y2='17.25'/></g><g stroke='black' stroke-width='1.2'><line x1='6.5' y1='2.5' x2='6.5' y2='17.5'/><line x1='3.5' y1='2.75' x2='9.5' y2='2.75'/><line x1='3.5' y1='17.25' x2='9.5' y2='17.25'/></g></g></svg>")
      6 10,
    text;
}

.CodeMirror-selected {
  background: rgba(217, 119, 87, 0.22) !important;
}

.CodeMirror-focused .CodeMirror-selected {
  background: rgba(217, 119, 87, 0.3) !important;
}

.CodeMirror-line::selection,
.CodeMirror-line > span::selection,
.CodeMirror-line > span > span::selection {
  background: rgba(217, 119, 87, 0.3);
}

.CodeMirror-line::-moz-selection,
.CodeMirror-line > span::-moz-selection,
.CodeMirror-line > span > span::-moz-selection {
  background: rgba(217, 119, 87, 0.3);
}

/* ═══════════════════════════════════════
   Ant Design 覆盖：开关改为暖橙
═══════════════════════════════════════ */
.ant-switch.ant-switch-checked {
  background: var(--app-accent) !important;
}

.ant-switch.ant-switch-checked:hover:not(.ant-switch-disabled) {
  background: var(--app-accent-warm) !important;
}

/* ═══════════════════════════════════════
   滚动条
═══════════════════════════════════════ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--app-border-strong);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-strong);
}

/* ═══════════════════════════════════════
   动画
═══════════════════════════════════════ */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ═══════════════════════════════════════
   响应式
═══════════════════════════════════════ */
@media (max-width: 1200px) {
  .main-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .btn-primary:hover,
  .btn-secondary:hover,
  .btn-accent:hover {
    transform: none;
  }

  .btn-primary:hover {
    background: var(--app-accent);
    box-shadow: 0 6px 18px rgba(217, 119, 87, 0.3);
  }

  .btn-secondary:hover {
    background: transparent;
    border-color: var(--app-border-strong);
  }

  .btn-accent:hover {
    background: rgba(217, 119, 87, 0.08);
    border-color: rgba(217, 119, 87, 0.22);
  }

  .background-toggle:hover,
  .colorize-toggle:hover,
  .attrs-toggle:hover {
    transform: none;
    border-color: var(--app-border);
    box-shadow: 0 2px 8px rgba(20, 20, 19, 0.06);
  }

  .font-picker-wrap {
    top: 160px;
  }

  .font-pick-opt {
    height: 30px;
    padding: 0 10px;
    font-size: 0.76rem;
  }

  .font-picker-label {
    font-size: 0.62rem;
  }

  .btn-primary:active {
    transform: scale(1.04);
  }

  .btn-secondary:active,
  .btn-accent:active {
    transform: scale(1.04);
  }

  .background-toggle:active,
  .colorize-toggle:active,
  .attrs-toggle:active {
    transform: scale(1.1);
  }

  .app-container {
    padding: 20px 16px 24px;
  }

  .header {
    margin-bottom: 28px;
  }

  .header h1 {
    font-size: clamp(1.8rem, 6vw, 2.4rem);
  }

  .header p {
    font-size: 0.96rem;
  }

  .main-content {
    gap: 20px;
  }

  .card-header {
    padding: 14px 18px;
    min-height: 56px;
  }

  .card-content {
    padding: 18px;
    gap: 16px;
  }

  .card-title {
    font-size: 1.02rem;
  }

  .CodeMirror {
    height: 320px !important;
    font-size: 13px;
  }

  .button-group {
    gap: 10px;
  }

  .btn {
    height: 44px;
    font-size: 0.9rem;
  }

  .btn-sm {
    height: 36px;
    font-size: 0.78rem;
  }

  .diagram-container {
    min-height: 420px;
  }
}

@media (max-width: 480px) {
  .app-container {
    padding: 16px 12px 24px;
  }

  .header {
    margin-bottom: 22px;
  }

  .header-eyebrow {
    font-size: 0.68rem;
  }

  .header h1 {
    font-size: 1.7rem;
    letter-spacing: -0.02em;
  }

  .header p {
    font-size: 0.88rem;
  }

  .main-content {
    gap: 16px;
  }

  .card {
    border-radius: var(--radius-lg);
  }

  .card-header {
    padding: 12px 14px;
  }

  .card-content {
    padding: 14px;
    gap: 12px;
  }

  .card-title {
    font-size: 0.96rem;
  }

  .CodeMirror {
    height: 260px !important;
    font-size: 12px;
  }

  .diagram-container {
    min-height: 320px;
    background-size: 18px 18px;
  }

  .legend-item {
    font-size: 0.72rem;
    padding: 3px 9px;
  }

  .btn {
    height: 42px;
    font-size: 0.85rem;
    padding: 0 14px;
  }

  .btn-sm {
    height: 32px;
    font-size: 0.72rem;
    padding: 0 12px;
  }

  /* 手机版：隐藏图例，居中控制区 */
  .output-section .card-header > div:first-child > div:last-child {
    display: none !important;
  }

  .output-section .card-header {
    justify-content: center !important;
    flex-wrap: wrap;
  }

  .output-section .card-header > div:last-child {
    margin: 0 !important;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px !important;
  }

  .card-header > div:last-child .ant-switch {
    transform: scale(0.9);
  }
}

/* ═══════════════════════════════════════
   语言切换器（右上胶囊）
═══════════════════════════════════════ */
.lang-switch {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  padding: 4px;
  gap: 0;
  background: color-mix(in srgb, var(--app-bg-overlay) 92%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--app-border);
  border-radius: 999px;
  box-shadow: 0 2px 10px rgba(20, 20, 19, 0.06);
  transition:
    border-color var(--duration-normal) var(--ease-default),
    box-shadow var(--duration-normal) var(--ease-default);
}

.lang-switch:hover {
  border-color: var(--app-border-strong);
  box-shadow: 0 6px 16px rgba(20, 20, 19, 0.08);
}

.lang-switch .lang-option {
  position: relative;
  z-index: 1;
  width: 32px;
  height: 32px;
  border: 0;
  padding: 0;
  margin: 0;
  background: transparent;
  cursor: pointer;
  font-family: var(--app-font);
  font-size: 0.78rem;
  font-weight: var(--weight-medium);
  letter-spacing: 0.02em;
  color: var(--app-ink-3);
  border-radius: 50%;
  display: grid;
  place-items: center;
  transition: color 260ms var(--ease-default);
}

.lang-switch .lang-option:hover {
  color: var(--app-ink-2);
}

.lang-switch .lang-option.is-active {
  color: var(--app-ink);
}

.lang-switch .lang-thumb {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--app-bg-raised);
  box-shadow:
    0 1.5px 4px rgba(20, 20, 19, 0.1),
    0 0 0 1px var(--app-border);
  transition: transform 380ms cubic-bezier(0.32, 0.72, 0.28, 1);
  pointer-events: none;
}

.lang-switch[data-lang="en"] .lang-thumb {
  transform: translateX(32px);
}

.lang-switch:focus-within {
  border-color: var(--app-accent);
  box-shadow: 0 0 0 3px rgba(217, 119, 87, 0.18);
}

.lang-switch .lang-option:focus-visible {
  outline: none;
}

/* 语言切换：整页平滑过渡 */
.lang-fade-target {
  transition: opacity 220ms var(--ease-default);
}

body.is-lang-fading .lang-fade-target {
  opacity: 0.28;
}

@media (max-width: 500px) {
  .lang-switch {
    top: 14px;
    right: 14px;
  }

  .lang-switch .lang-option,
  .lang-switch .lang-thumb {
    width: 28px;
    height: 28px;
    font-size: 0.72rem;
  }

  .lang-switch[data-lang="en"] .lang-thumb {
    transform: translateX(28px);
  }
}

/* ═══════════════════════════════════════
   GitHub Corner（左上暖橙折角）
═══════════════════════════════════════ */
.github-corner {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 9999;
  border: 0;
  width: 68px;
  height: 68px;
  overflow: hidden;
  display: block;
}

.github-corner svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 68px;
  height: 68px;
  border: 0;
  fill: var(--app-accent);
  color: #faf9f5;
  transform: scaleX(-1);
  transition: fill var(--duration-normal) var(--ease-default);
}

.github-corner:hover svg {
  fill: var(--app-accent-warm);
}

.github-corner .octo-arm {
  transform-origin: 130px 106px;
}

.github-corner:hover .octo-arm {
  animation: octocat-wave 640ms var(--ease-default);
}

.github-corner:focus-visible {
  outline: none;
}

.github-corner:focus-visible svg {
  fill: var(--app-accent-warm);
}

@keyframes octocat-wave {
  0%,
  100% {
    transform: rotate(0);
  }

  20%,
  60% {
    transform: rotate(-25deg);
  }

  40%,
  80% {
    transform: rotate(10deg);
  }
}

@media (max-width: 500px) {
  .github-corner {
    width: 54px;
    height: 54px;
  }

  .github-corner svg {
    width: 54px;
    height: 54px;
  }

  .github-corner:hover .octo-arm {
    animation: none;
  }

  .github-corner .octo-arm {
    animation: octocat-wave 640ms var(--ease-default);
  }
}

/* ═══════════════════════════════════════
   深色模式（遵循系统）
═══════════════════════════════════════ */
@media (prefers-color-scheme: dark) {
  body::before {
    background:
      radial-gradient(
        ellipse 60% 50% at 12% 0%,
        rgba(217, 119, 87, 0.12) 0%,
        transparent 60%
      ),
      radial-gradient(
        ellipse 45% 45% at 100% 100%,
        rgba(106, 155, 204, 0.08) 0%,
        transparent 55%
      );
  }

  .input-textarea,
  .CodeMirror {
    background: var(--color-bg-overlay);
    color: var(--app-ink);
  }

  .diagram-container {
    background-color: #ffffff;
  }

  ::-webkit-scrollbar-thumb {
    background: var(--color-border-default);
  }
}

/* ═══════════════════════════════════════
   动效导出按钮
═══════════════════════════════════════ */
.export-btn-wrap {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.export-btn {
  position: relative;
  height: 52px;
  padding: 0;
  border: 0;
  border-radius: 9999px;
  color: #fff;
  background: linear-gradient(to bottom, #262626, #171717);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 16px 32px -10px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  font-family: var(--app-font);
  transition:
    width 560ms cubic-bezier(0.32, 0.72, 0, 1),
    transform 560ms cubic-bezier(0.32, 0.72, 0, 1),
    box-shadow 560ms cubic-bezier(0.32, 0.72, 0, 1);
}

.export-btn[data-state="idle"] { width: 140px; }
.export-btn[data-state="open"] { width: 296px; cursor: default; }
.export-btn[data-state="loading"] { width: 200px; cursor: default; }
.export-btn[data-state="success"] { width: 180px; cursor: default; }

.export-btn[data-state="idle"]:hover {
  transform: scale(1.02);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 20px 40px -10px rgba(0, 0, 0, 0.4);
}
.export-btn[data-state="idle"]:active {
  transform: scale(0.97);
}
.export-btn:focus-visible {
  outline: none;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 16px 32px -10px rgba(0, 0, 0, 0.3),
    0 0 0 2px var(--app-bg),
    0 0 0 4px var(--app-accent);
}
.export-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
}

.export-progress {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: rgba(255, 255, 255, 0.1);
  transition: width 300ms cubic-bezier(0, 0, 0.2, 1);
  pointer-events: none;
}

.export-view {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  white-space: nowrap;
  transition:
    opacity 240ms ease,
    transform 340ms cubic-bezier(0.32, 0.72, 0, 1);
}
.export-view.is-on {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.export-view-idle .idle-label {
  font-weight: 600;
  letter-spacing: 0.14em;
  font-size: 15px;
}
.export-view-idle .arrow-icon {
  color: #d4d4d4;
  transition: transform 340ms cubic-bezier(0.32, 0.72, 0, 1);
}
.export-btn[data-state="idle"]:hover .export-view-idle .arrow-icon {
  transform: translateY(2px);
}

.export-view-open {
  padding: 0 6px;
  gap: 0;
  justify-content: space-between;
}
.export-opt {
  flex: 1;
  height: 40px;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 200ms ease;
}
.export-opt:hover {
  background: rgba(64, 64, 64, 0.5);
}
.export-opt-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #d4d4d4;
  pointer-events: none;
  transition: color 200ms ease;
}
.export-opt[data-fmt="PNG"]:hover .export-opt-label { color: #60a5fa; }
.export-opt[data-fmt="SVG"]:hover .export-opt-label { color: #34d399; }
.export-opt[data-fmt="XML"]:hover .export-opt-label { color: #f59e0b; }

.export-sep {
  width: 1px;
  height: 18px;
  background: #404040;
  margin: 0 2px;
  transition: opacity 200ms ease;
  flex: 0 0 1px;
}
.export-view-open:hover .export-sep {
  opacity: 0.4;
}

.export-cancel {
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a3a3a3;
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease;
}
.export-cancel:hover {
  background: rgba(64, 64, 64, 0.5);
  color: #fff;
}
.export-cancel svg {
  pointer-events: none;
}

.export-view-loading .export-spinner {
  width: 16px;
  height: 16px;
  color: #a3a3a3;
  animation: export-spin 800ms linear infinite;
}
@keyframes export-spin {
  to { transform: rotate(360deg); }
}
.export-view-loading .loading-label {
  font-size: 14px;
  color: #e5e5e5;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.export-view-success .check-icon {
  width: 16px;
  height: 16px;
  color: #34d399;
}
.export-view-success .check-icon path {
  stroke-dasharray: 18;
  stroke-dashoffset: 18;
}
.export-view-success.is-on .check-icon path {
  animation: export-draw 460ms cubic-bezier(0.32, 0.72, 0, 1) 180ms forwards;
}
@keyframes export-draw {
  to { stroke-dashoffset: 0; }
}
.export-view-success .success-label {
  font-size: 14px;
  color: #34d399;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ═══════════════════════════════════════
   设置面板（右侧滑出抽屉）
═══════════════════════════════════════ */
.settings-toggle {
  position: absolute;
  right: 16px;
  top: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--app-border);
  background: color-mix(in srgb, var(--app-bg-overlay) 92%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 8px rgba(20, 20, 19, 0.06);
  display: grid;
  place-items: center;
  cursor: pointer;
  z-index: 100;
  transition:
    transform var(--duration-fast) var(--ease-default),
    background var(--duration-normal) var(--ease-default),
    border-color var(--duration-normal) var(--ease-default),
    box-shadow var(--duration-normal) var(--ease-default);
}

.settings-toggle:hover {
  transform: scale(1.06);
  border-color: var(--app-accent);
  box-shadow: 0 6px 16px rgba(20, 20, 19, 0.1);
}

.settings-toggle:active {
  transform: scale(0.95);
}

.settings-toggle i {
  font-size: 16px;
  color: var(--app-ink-2);
  transition: color var(--duration-fast) var(--ease-default);
}

.settings-toggle:hover i {
  color: var(--app-accent-warm);
}

.settings-toggle.active {
  background: var(--app-accent);
  border-color: var(--app-accent);
  box-shadow: 0 4px 14px rgba(217, 119, 87, 0.25);
}

.settings-toggle.active i {
  color: #fff;
}

.settings-toggle.active:hover {
  background: var(--app-accent-warm);
  border-color: var(--app-accent-warm);
}

/* 遮罩层 */
.settings-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.18);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-default);
}

.settings-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* 面板主体 */
.settings-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 340px;
  max-width: 85%;
  background: var(--app-bg-raised);
  border-left: 1px solid var(--app-border);
  z-index: 300;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 380ms cubic-bezier(0.32, 0.72, 0.28, 1);
  box-shadow: -4px 0 24px rgba(20, 20, 19, 0.08);
}

.settings-panel.is-open {
  transform: translateX(0);
}

.settings-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--app-border);
  min-height: 60px;
  flex-shrink: 0;
}

.settings-panel-title {
  font-family: var(--app-font-display);
  font-weight: var(--weight-medium);
  font-size: 1.05rem;
  color: var(--app-ink);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.settings-close {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  display: grid;
  place-items: center;
  color: var(--app-ink-3);
  transition:
    background var(--duration-fast) var(--ease-default),
    color var(--duration-fast) var(--ease-default),
    transform var(--duration-fast) var(--ease-default);
}

.settings-close:hover {
  background: var(--app-bg-overlay);
  color: var(--app-ink);
  transform: scale(1.08);
}

.settings-close:active {
  transform: scale(0.95);
}

.settings-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px 24px;
}

/* 分组 */
.settings-group {
  margin-bottom: 24px;
}

.settings-group:last-child {
  margin-bottom: 0;
}

.settings-group-title {
  font-family: var(--app-font);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--app-ink-3);
  margin: 0 0 14px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--app-border);
}

/* 单个设置项 */
.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  gap: 12px;
}

.settings-item + .settings-item {
  border-top: 1px solid color-mix(in srgb, var(--app-border) 50%, transparent);
}

.settings-item-label {
  font-size: 0.88rem;
  color: var(--app-ink-2);
  white-space: nowrap;
  line-height: 1.4;
}

.settings-item-value {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* 滑块 */
.settings-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 6px;
  border-radius: 3px;
  background: var(--app-border);
  outline: none;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-default);
}

.settings-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--app-accent);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(20, 20, 19, 0.18);
  cursor: pointer;
  transition:
    transform var(--duration-fast) var(--ease-default),
    box-shadow var(--duration-fast) var(--ease-default);
}

.settings-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 2px 8px rgba(217, 119, 87, 0.3);
}

.settings-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--app-accent);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(20, 20, 19, 0.18);
  cursor: pointer;
}

.settings-slider-value {
  font-family: var(--app-font-mono);
  font-size: 0.78rem;
  color: var(--app-ink-3);
  min-width: 32px;
  text-align: right;
  user-select: none;
}

/* 开关行（带 Ant Design Switch） */
.settings-item .ant-switch {
  flex-shrink: 0;
}

/* 按钮组 */
.settings-btn-group {
  display: flex;
  gap: 4px;
  background: var(--app-bg-overlay);
  border: 1px solid var(--app-border);
  border-radius: 8px;
  padding: 3px;
}

.settings-btn-opt {
  height: 30px;
  padding: 0 12px;
  border: none;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  font-family: var(--app-font);
  font-size: 0.8rem;
  font-weight: var(--weight-medium);
  color: var(--app-ink-3);
  transition:
    background var(--duration-fast) var(--ease-default),
    color var(--duration-fast) var(--ease-default),
    box-shadow var(--duration-fast) var(--ease-default);
  white-space: nowrap;
}

.settings-btn-opt:hover {
  color: var(--app-ink-2);
  background: rgba(217, 119, 87, 0.06);
}

.settings-btn-opt.is-active {
  background: var(--app-accent);
  color: #fff;
  box-shadow: 0 2px 6px rgba(217, 119, 87, 0.2);
}

.settings-btn-opt.is-active:hover {
  background: var(--app-accent-warm);
  color: #fff;
}

/* 重置按钮 */
.settings-reset {
  width: 100%;
  height: 38px;
  border: 1px solid var(--app-border);
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
  font-family: var(--app-font);
  font-size: 0.84rem;
  font-weight: var(--weight-medium);
  color: var(--app-ink-3);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 8px;
  transition:
    background var(--duration-fast) var(--ease-default),
    color var(--duration-fast) var(--ease-default),
    border-color var(--duration-fast) var(--ease-default);
}

.settings-reset:hover {
  background: rgba(192, 69, 58, 0.06);
  color: var(--color-error);
  border-color: rgba(192, 69, 58, 0.2);
}

.settings-reset:active {
  transform: scale(0.98);
}

/* ── 设置面板：辅助控件样式 ── */
.s-divider {
  font-family: var(--app-font);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--app-ink-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 12px 0 6px;
  margin-top: 8px;
  border-top: 1px solid color-mix(in srgb, var(--app-border) 50%, transparent);
}
.s-divider:first-child { margin-top: 0; }
.s-divider span { background: var(--app-bg); padding-right: 8px; }

.s-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  gap: 12px;
}
.s-row-inline {
  flex-direction: row;
}
.s-row-indent {
  padding-left: 20px;
  padding-top: 0;
}
.s-label {
  font-size: 0.88rem;
  color: var(--app-ink-2);
  white-space: nowrap;
  flex-shrink: 0;
}
.s-tip {
  font-size: 0.72rem;
  color: var(--app-ink-3);
  margin-top: 2px;
}
.s-row-left {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

/* Switch */
.s-switch-row { cursor: pointer; }
.s-switch { flex-shrink: 0; cursor: pointer; }
.s-switch-track {
  width: 40px;
  height: 22px;
  border-radius: 11px;
  background: color-mix(in srgb, var(--app-ink-3) 25%, transparent);
  border: 1.5px solid var(--app-border);
  transition: all 0.2s;
  position: relative;
}
.s-switch.is-on .s-switch-track {
  background: var(--app-accent);
  border-color: var(--app-accent);
}
.s-switch-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.2s;
}
.s-switch.is-on .s-switch-thumb {
  transform: translateX(18px);
}

/* Slider */
.s-slider-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}
.s-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: color-mix(in srgb, var(--app-ink-3) 20%, transparent);
  outline: none;
  cursor: pointer;
}
.s-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--app-accent);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(217, 119, 87, 0.3);
  transition: transform 0.15s;
}
.s-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.s-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--app-accent);
  border: none;
  cursor: pointer;
}
.s-slider-val {
  font-family: var(--app-font-mono);
  font-size: 0.78rem;
  color: var(--app-ink-3);
  min-width: 32px;
  text-align: right;
}

/* Color Picker */
.s-color-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}
.s-color {
  -webkit-appearance: none;
  appearance: none;
  width: 28px;
  height: 28px;
  border: 2px solid var(--app-border);
  border-radius: 6px;
  padding: 0;
  cursor: pointer;
  background: none;
  flex-shrink: 0;
}
.s-color::-webkit-color-swatch-wrapper { padding: 2px; }
.s-color::-webkit-color-swatch { border: none; border-radius: 3px; }
.s-color::-moz-color-swatch { border: none; border-radius: 3px; }
.s-color-hex {
  font-family: var(--app-font-mono);
  font-size: 0.72rem;
  color: var(--app-ink-3);
}

/* Number Input */
.s-number {
  width: 72px;
  height: 30px;
  padding: 0 8px;
  border: 1.5px solid var(--app-border);
  border-radius: 8px;
  font-family: var(--app-font-mono);
  font-size: 0.82rem;
  color: var(--app-ink);
  background: var(--app-bg);
  outline: none;
  text-align: center;
  flex-shrink: 0;
  transition: border-color 0.2s;
}
.s-number:focus { border-color: var(--app-accent); }
.s-number-sm { width: 56px; height: 26px; font-size: 0.78rem; }
.s-number::-webkit-inner-spin-button,
.s-number::-webkit-outer-spin-button { opacity: 0.4; }

/* Select */
.s-select {
  width: 120px;
  height: 30px;
  padding: 0 8px;
  border: 1.5px solid var(--app-border);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--app-ink);
  background: var(--app-bg);
  outline: none;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.2s;
}
.s-select:focus { border-color: var(--app-accent); }

/* 2-col grid */
.s-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 16px;
}

/* 响应式 */
@media (max-width: 768px) {
  .settings-panel {
    width: 300px;
  }

  .settings-slider {
    width: 90px;
  }
}

@media (max-width: 480px) {
  .settings-panel {
    width: 100%;
    max-width: 100%;
  }

  .settings-slider {
    width: 80px;
  }
}

/* ═══════════════════════════════════════
   焦点样式（可访问性）
═══════════════════════════════════════ */
.btn:focus-visible,
.background-toggle:focus-visible,
.colorize-toggle:focus-visible,
.attrs-toggle:focus-visible,
.github-corner:focus-visible {
  outline: 2px solid var(--app-accent);
  outline-offset: 3px;
}