/* =========================
   工具页面通用样式
========================= */

.tool-page {
  width: 100%;
  max-width: 900px;
  margin: auto;
  padding: 40px 20px 80px;
}

.back-home {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #7E8791;
  font-size: 13px;
  margin-bottom: 24px;
  transition: color var(--transition);
}

.back-home:hover {
  color: #18202A;
}

.tool-header {
  text-align: center;
  margin-bottom: 32px;
}

.tool-header .tool-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: auto;
  background: #EEF1F4;
  border-radius: 16px;
  font-size: 26px;
}

.tool-header h1 {
  margin-top: 16px;
  font-size: 32px;
  letter-spacing: -1px;
}

.tool-header p {
  margin-top: 8px;
  color: #7E8791;
  font-size: 14px;
}

.tool-box {
  padding: 24px;
  background: #FFFFFF;
  border: 1px solid #E5E9ED;
  border-radius: 20px;
  box-shadow: 0 8px 30px rgba(20,30,40,0.05);
}

/* 通用表单 */
.tool-input,
.tool-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #E5E9ED;
  border-radius: 10px;
  font-size: 14px;
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  outline: none;
  resize: vertical;
  transition: border-color var(--transition);
  background: #FAFBFC;
}

.tool-input:focus,
.tool-textarea:focus {
  border-color: #4F6EF7;
  background: #FFFFFF;
}

.tool-textarea {
  min-height: 200px;
  line-height: 1.6;
}

/* 按钮 */
.tool-btn {
  padding: 10px 20px;
  border-radius: 10px;
  border: none;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
  font-weight: 500;
}

.tool-btn-primary {
  color: #FFFFFF;
  background: #18202A;
}

.tool-btn-primary:hover {
  background: #26313C;
}

.tool-btn-secondary {
  color: #4F5965;
  background: #EEF1F3;
}

.tool-btn-secondary:hover {
  background: #E3E7EB;
}

.tool-btn-accent {
  color: #FFFFFF;
  background: #4F6EF7;
}

.tool-btn-accent:hover {
  background: #3D5CE5;
}

.tool-btn-sm {
  padding: 6px 14px;
  font-size: 12px;
  border-radius: 8px;
}

/* 按钮组 */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

/* 结果区 */
.tool-result {
  margin-top: 20px;
  padding: 16px;
  background: #F8F9FA;
  border-radius: 12px;
  display: none;
}

.tool-result.show {
  display: block;
}

.tool-result-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
}

/* 信息卡片 */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.info-card {
  padding: 14px;
  background: #FFFFFF;
  border: 1px solid #E5E9ED;
  border-radius: 10px;
  text-align: center;
}

.info-card .info-label {
  font-size: 11px;
  color: #8B949E;
}

.info-card .info-value {
  font-size: 18px;
  font-weight: 700;
  margin-top: 4px;
}

/* 上传区域 */
.upload-area {
  position: relative;
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
  background: #F8F9FA;
  border: 2px dashed #DCE1E6;
  border-radius: 18px;
  cursor: pointer;
  transition: 0.25s ease;
}

.upload-area:hover,
.upload-area.dragover {
  border-color: #AAB3BD;
  background: #F4F6F8;
}

.upload-icon {
  font-size: 40px;
}

.upload-area h3 {
  margin-top: 12px;
  font-size: 15px;
}

.upload-area p {
  margin-top: 4px;
  color: #8A949F;
  font-size: 12px;
}

.upload-btn {
  margin-top: 16px;
  padding: 10px 20px;
  color: #FFFFFF;
  background: #18202A;
  border-radius: 10px;
  font-size: 13px;
  cursor: pointer;
  border: none;
}

/* 滑块 */
.range-control {
  display: flex;
  align-items: center;
  gap: 12px;
}

.range-control input[type="range"] {
  flex: 1;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: #DCE1E6;
  border-radius: 3px;
  outline: none;
}

.range-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: #18202A;
  border-radius: 50%;
  cursor: pointer;
}

.range-value {
  min-width: 36px;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: #4C5763;
}

/* 预览 */
.preview-area {
  margin-top: 20px;
  text-align: center;
  display: none;
}

.preview-area.show {
  display: block;
}

.preview-area img {
  max-width: 100%;
  max-height: 350px;
  border-radius: 12px;
  border: 1px solid #E5E8EB;
}

/* 设置区 */
.settings-panel {
  margin-top: 20px;
  padding: 18px;
  background: #F8F9FA;
  border-radius: 14px;
  display: none;
}

.settings-panel.show {
  display: block;
}

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

.setting-row:last-child {
  margin-bottom: 0;
}

.setting-label {
  font-size: 13px;
  font-weight: 600;
}

.setting-hint {
  font-size: 11px;
  color: #8A949F;
  margin-top: 2px;
}

/* 响应式 */
@media (max-width: 600px) {
  .tool-page {
    padding: 30px 15px 60px;
  }

  .tool-header h1 {
    font-size: 26px;
  }

  .tool-box {
    padding: 16px;
    border-radius: 16px;
  }

  .setting-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .range-control {
    width: 100%;
  }
}