/* =========================================================
   components.css — 通用 UI 组件
   跨工具复用的样式：按钮组 / 输入框 / 面板 / Toggle / Color picker / Upload / 滑块
   不含任何工具专属样式（工具专属放 tools/<tool>.css）
   ========================================================= */

/* =========================================================
   1. 按钮组（预设 / 类型 / 倍率 / 尺寸快速 / Pill group）
   ========================================================= */

/* ---------- 基础按钮组 ---------- */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.btn-group button {
  padding: 6px 14px;
  border-radius: var(--r-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
  background: var(--bg-sunk);
  border: 1px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.btn-group button:hover {
  color: var(--ink);
  border-color: var(--line);
}
.btn-group button.is-active {
  background: #ffffff;
  color: var(--ink);
  border-color: rgba(60, 55, 48, 0.08);
  font-weight: 600;
  box-shadow: 0 2px 8px -2px rgba(60, 55, 48, 0.12);
}
[data-theme="dark"] .btn-group button.is-active {
  background: var(--bg-elev);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 2px 8px -2px rgba(0, 0, 0, 0.3);
}

/* =========================================================
   2. 输入框 / 文本域
   ========================================================= */
.input,
.textarea {
  width: 100%;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid rgba(60, 55, 48, 0.10);
  background: rgba(255, 255, 255, 0.5);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
[data-theme="dark"] .input,
[data-theme="dark"] .textarea {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.10);
}
.input:focus,
.textarea:focus {
  border-color: rgba(107, 130, 148, 0.5);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 0 0 4px rgba(107, 130, 148, 0.15);
}
.textarea { resize: vertical; min-height: 80px; font-family: inherit; }

.input-group { margin-bottom: 16px; }
.hidden { display: none; }

/* =========================================================
   3. 按钮
   ========================================================= */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.btn {
  padding: 8px 16px;
  border-radius: var(--r-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  transition: background 0.2s, transform 0.2s;
}
.btn:hover { background: var(--bg-sunk); transform: translateY(-1px); }
.btn--primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn--primary:hover { background: var(--ink-2); }

/* =========================================================
   4. 面板（玻璃卡片容器）
   ========================================================= */
.panel {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: var(--r-lg);
  padding: 22px;
  box-shadow:
    0 6px 24px -6px rgba(60, 55, 48, 0.10),
    0 2px 4px rgba(60, 55, 48, 0.04);
}
[data-theme="dark"] .panel {
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow:
    0 6px 24px -6px rgba(0, 0, 0, 0.4),
    0 2px 4px rgba(0, 0, 0, 0.2);
}
.panel-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-3);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.panel-sub-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-3);
  margin: 8px 0;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.panel-hint {
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 8px;
  line-height: 1.5;
}

/* =========================================================
   5. 行布局（label + 内容）
   ========================================================= */
.row {
  display: grid;
  grid-template-columns: 80px 1fr;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.row .label { margin-bottom: 0; }
.label {
  display: block;
  font-size: 13px;
  color: var(--ink-2);
  margin-bottom: 6px;
  font-weight: 500;
}

/* =========================================================
   6. 尺寸滑块
   ========================================================= */
.size-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 10px;
}
.size-label {
  display: grid;
  grid-template-columns: 60px 1fr 40px;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-2);
}
.size-val {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  text-align: right;
}
.range {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--line);
  border-radius: 4px;
  outline: none;
}
.range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  cursor: pointer;
}
.range::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 0;
  cursor: pointer;
}

/* =========================================================
   7. Toggle 开关
   ========================================================= */
.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  border-radius: var(--r-pill);
  background: var(--line);
  transition: background 0.3s var(--ease-out-quart);
  flex-shrink: 0;
  justify-self: end;
}
.toggle-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-elev);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s var(--ease-out-quart);
}
.toggle[aria-checked="true"] {
  background: var(--brand);
}
.toggle[aria-checked="true"] .toggle-knob {
  transform: translateX(20px);
}

/* =========================================================
   8. 颜色选择器
   ========================================================= */
.color {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: end;
}
.color input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}
.color input[type="color"]::-webkit-color-swatch-wrapper { padding: 2px; border-radius: 6px; }
.color input[type="color"]::-webkit-color-swatch { border: 0; border-radius: 5px; }
.color input[type="color"]::-moz-color-swatch { border: 0; border-radius: 5px; }
.color-val {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  min-width: 80px;
}

/* =========================================================
   9. 拖拽上传区
   ========================================================= */
.upload {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 20px;
  border: 2px dashed var(--line-strong);
  border-radius: var(--r-md);
  background: var(--bg-sunk);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  margin-bottom: 12px;
  position: relative;
}
.upload:hover,
.upload.is-drag {
  border-color: var(--brand);
  background: var(--brand-bg);
}
.upload-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--bg-elev);
  border-radius: 50%;
  color: var(--brand);
  font-size: 14px;
}
.upload-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}
.upload-hint {
  font-size: 11px;
  color: var(--ink-3);
}
.upload-preview {
  margin-top: 8px;
  max-width: 80px;
  max-height: 80px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.upload-preview img { width: 100%; height: 100%; object-fit: contain; display: block; }