/* ===== 设计工具页 ===== */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.tool-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition-spring);
  box-shadow: var(--shadow);
}
.tool-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent-soft);
  transform: translateY(-2px);
}
.tool-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: -0.2px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.tool-card h3 [data-icon] {
  width: 18px;
  height: 18px;
  color: var(--accent);
  flex-shrink: 0;
}
.tool-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 18px; line-height: 1.5; }

/* ===== 对比度检查器 ===== */
.contrast-inputs { display: flex; gap: 16px; margin-bottom: 16px; }
.contrast-field { flex: 1; display: flex; flex-direction: column; gap: 5px; }
.contrast-field label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.contrast-preview {
  padding: 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  text-align: center;
  transition: background var(--transition);
  border: 1px solid var(--border);
}
.contrast-preview span { font-size: 28px; font-weight: 750; letter-spacing: -0.5px; }

.contrast-result {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.contrast-ratio {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.ratio-label { font-size: 13px; color: var(--text-muted); font-weight: 500; }
.ratio-value {
  font-size: 32px;
  font-weight: 850;
  font-family: var(--font-mono);
  letter-spacing: -1px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* WCAG 徽章 */
.wcag-badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  font-size: 11px;
  font-weight: 650;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  transition: all var(--transition);
  letter-spacing: 0.3px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.badge.pass { background: var(--success-light); color: #065f46; }
.badge.fail { background: var(--danger-light); color: #991b1b; }
[data-theme="dark"] .badge.pass { color: #34d399; }
[data-theme="dark"] .badge.fail { color: #f87171; }

/* ===== 格式转换器 ===== */
.convert-input {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 16px;
}
.convert-input label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.convert-input input {
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 14px;
  font-family: var(--font-mono);
  outline: none;
  background: var(--surface-soft);
  color: var(--text);
  transition: all var(--transition);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.04);
}
.convert-input input:focus {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: var(--ring), inset 0 1px 3px rgba(0, 0, 0, 0.04);
}
.convert-input input::placeholder { color: var(--text-subtle); }

.convert-results {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}
.convert-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--surface-soft);
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}
.convert-item:hover {
  border-color: var(--border);
  background: var(--glass-bg);
}
.convert-label {
  font-size: 10px;
  font-weight: 750;
  color: var(--accent);
  min-width: 30px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.convert-item code {
  flex: 1;
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--text);
  transition: color var(--transition-slow);
}
.convert-preview {
  height: 44px;
  border-radius: var(--radius-xs);
  transition: background var(--transition);
  border: 1px solid var(--border);
}

/* ===== 色阶生成器 ===== */
.shade-controls { margin-bottom: 16px; }
.shade-strip {
  display: flex;
  border-radius: var(--radius-xs);
  overflow: hidden;
  height: 52px;
  margin-bottom: 14px;
  border: 1px solid var(--border);
}
.shade-swatch {
  flex: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 6px 2px;
  cursor: pointer;
  transition: flex var(--transition);
  position: relative;
}
.shade-swatch:hover { flex: 1.8; z-index: 1; }
.shade-swatch span {
  font-size: 9px;
  font-family: var(--font-mono);
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0,0,0,.4);
  white-space: nowrap;
  pointer-events: none;
}
.shade-actions { display: flex; gap: 8px; }

/* ===== 颜色混合器 ===== */
.mix-inputs { display: flex; gap: 16px; margin-bottom: 14px; }
.mix-field { flex: 1; display: flex; flex-direction: column; gap: 5px; }
.mix-field label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.mix-slider { margin-bottom: 14px; }
.mix-slider input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin-bottom: 2px;
}
.mix-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}
.mix-preview {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  background: var(--surface-soft);
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
}
.mix-result {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  flex-shrink: 0;
  transition: background var(--transition);
}
.mix-preview code {
  font-size: 16px;
  font-weight: 650;
  font-family: var(--font-mono);
}

/* ===== 色盲模拟器 ===== */
.cvd-controls { margin-bottom: 16px; }
.cvd-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.cvd-item {
  text-align: center;
  border-radius: var(--radius-xs);
  overflow: hidden;
  border: 1px solid var(--border);
}
.cvd-swatch {
  height: 60px;
  transition: background var(--transition);
}
.cvd-label {
  font-size: 11px;
  font-weight: 600;
  padding: 6px 8px;
  background: var(--surface-soft);
  color: var(--text-muted);
}