/* ============================================
   跑步配速计算器 - 主样式表
   基于 limitless 设计风格
   ============================================ */

/* ---- 基础重置与全局 ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: #efefef;
  color: #1e1e1e;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  line-height: 1.8;
  min-height: 100vh;
}

.container_que {
  text-align: center;
}

.container_que img {
  max-width: 100%;
  height: auto;
  border: none;
}

/* ---- 应用容器 ---- */
.app-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
}

/* 宽屏容器扩展 */
@media (min-width: 1200px) {
  .app-container {
    max-width: 1400px;
  }
}

@media (min-width: 1600px) {
  .app-container {
    max-width: 1800px;
  }
}

/* ---- 头部 ---- */
.app-header {
  text-align: center;
  margin-bottom: 20px;
}

.app-header h1 {
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.subtitle {
  font-size: 0.9rem;
  color: #555;
}

/* ---- 主体：左右栏（滚动锁定） ---- */
.main-content {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.input-panel {
  flex: 0 0 420px;
  min-width: 280px;
  max-width: 500px;
}

.result-panel {
  flex: 1 1 320px;
  min-width: 260px;
  position: sticky;
  top: 16px;
  align-self: flex-start;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
}

.result-panel::-webkit-scrollbar {
  width: 4px;
}

.result-panel::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 4px;
}

/* 宽屏：扩大左侧，表单双列，减少纵向滚动 */
@media (min-width: 1200px) {
  .input-panel {
    flex: 3 1 520px;
    max-width: 70%;
  }

  .result-panel {
    flex: 2 1 340px;
    max-width: 40%;
  }
}

@media (min-width: 1600px) {
  .input-panel {
    flex: 3 1 600px;
    max-width: 65%;
  }

  .result-panel {
    flex: 2 1 380px;
  }
}

/* ---- 折叠模块 ---- */
.collapsible-module {
  background-color: #ffffff;
  border: 1px solid #1e1e1e;
  border-radius: 10px;
  box-shadow: 0 0px 4px rgb(18 18 18 / 15%);
  margin-bottom: 12px;
  overflow: hidden;
}

.module-header {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 12px 14px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: #1e1e1e;
  text-align: left;
  font-family: inherit;
  transition: background-color 0.2s;
}

.module-header:hover {
  background-color: #efefef;
}

.module-icon {
  margin-right: 8px;
  font-size: 1.1rem;
}

.module-title {
  flex: 1;
}

.collapse-arrow {
  font-size: 0.75rem;
  transition: transform 0.25s;
  color: #666;
}

.module-header[aria-expanded="true"] .collapse-arrow {
  transform: rotate(180deg);
}

.module-body {
  padding: 0 14px 14px;
}

/* ---- 表单 ---- */
.form-group {
  margin-bottom: 10px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 2px;
  color: #333;
}

.required {
  color: #e74c3c;
  font-weight: bold;
}

.optional {
  color: #888;
  font-weight: normal;
  font-size: 0.8rem;
  margin-left: 4px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 0.9rem;
  font-family: inherit;
  background-color: #fff;
  color: #1e1e1e;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.form-group input.input-error {
  border-color: #e74c3c;
  box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.15);
}

.error-msg {
  display: block;
  color: #e74c3c;
  font-size: 0.78rem;
  min-height: 1.2em;
  margin-top: 2px;
}

/* ---- 云量字段集 ---- */
.cloud-fieldset {
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 10px;
}

.cloud-fieldset legend {
  font-size: 0.85rem;
  font-weight: 600;
  color: #333;
  padding: 0 6px;
}

.cloud-row label {
  font-size: 0.78rem;
  color: #666;
}

/* ---- 滑块组（目标强度） ---- */
.slider-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.slider-group input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, #60a5fa, #2563eb, #1d4ed8);
  outline: none;
  cursor: pointer;
  border: none;
  padding: 0;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #2563eb;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  transition: transform 0.1s, box-shadow 0.1s;
}

.slider-group input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.12);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.slider-group input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #2563eb;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.slider-value {
  min-width: 44px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: #2563eb;
  background: #eff6ff;
  border: 1px solid #93c5fd;
  border-radius: 6px;
  padding: 2px 8px;
}

.slider-desc {
  display: block;
  font-size: 0.76rem;
  color: #888;
  margin-top: 2px;
}

/* ---- 宽屏表单多列布局 ---- */
@media (min-width: 1200px) {
  .input-panel .module-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px 16px;
  }

  .input-panel .module-body .cloud-fieldset,
  .input-panel .module-body .slider-group {
    grid-column: 1 / -1;
  }
}

/* ---- 导出按钮 ---- */
.export-card {
  background-color: #fafafa;
  border: 1px solid #ccc;
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 12px;
  text-align: center;
}

.btn-export {
  display: inline-block;
  padding: 10px 20px;
  background-color: #10b981;
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.25s, transform 0.1s;
}

.btn-export:hover {
  background-color: #059669;
}

.btn-export:active {
  transform: scale(0.97);
}

.btn-export.export-success {
  background-color: #34d399;
  animation: flashSuccess 0.6s ease;
}

@keyframes flashSuccess {
  0% {
    opacity: 1;
  }

  50% {
    opacity: 0.7;
  }

  100% {
    opacity: 1;
  }
}

/* ---- 计算按钮 ---- */
.btn-calculate {
  display: block;
  width: 100%;
  padding: 12px;
  background-color: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.25s, transform 0.1s;
  margin-top: 8px;
  margin-bottom: 10px;
}

.btn-calculate:hover {
  background-color: #1d4ed8;
}

.btn-calculate:active {
  transform: scale(0.97);
}

/* ---- 结果面板 ---- */
.result-panel {
  background-color: #ffffff;
  border: 1px solid #1e1e1e;
  border-radius: 10px;
  box-shadow: 0 0px 4px rgb(18 18 18 / 15%);
  padding: 16px 16px 28px;
  min-height: 300px;
}

.result-placeholder {
  text-align: center;
  padding: 60px 20px;
  color: #888;
}

.placeholder-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.result-content {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

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

/* ---- 警告横幅 ---- */
.warning-banner {
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 14px;
  font-size: 0.88rem;
  font-weight: 500;
}

.warning-danger {
  background-color: #fef2f2;
  border: 1px solid #fca5a5;
  color: #991b1b;
}

.warning-info {
  background-color: #eff6ff;
  border: 1px solid #93c5fd;
  color: #1e40af;
}

/* ---- 结果卡片 ---- */
.result-card {
  background-color: #fafafa;
  border: 1px solid #ccc;
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 12px;
}

.result-card h3 {
  font-size: 0.9rem;
  color: #555;
  margin-bottom: 8px;
}

.pace-display {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1e1e1e;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
}

.cadence-display {
  font-size: 1.8rem;
  font-weight: 700;
  color: #2563eb;
  font-variant-numeric: tabular-nums;
}

.result-sub {
  font-size: 0.82rem;
  color: #888;
  margin-top: 2px;
}

/* ---- 信息行 ---- */
.info-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid #eee;
  font-size: 0.88rem;
}

.info-row:last-child {
  border-bottom: none;
}

.info-label {
  color: #555;
}

.info-value {
  font-weight: 600;
  color: #1e1e1e;
}

/* ---- 环境修正表 ---- */
.adj-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 4px;
}

.adj-table th,
.adj-table td {
  padding: 6px 8px;
  text-align: left;
  border-bottom: 1px solid #e5e5e5;
}

.adj-table th {
  background-color: #efefef;
  font-weight: 600;
  color: #555;
}

.adj-table .adj-total td {
  border-top: 2px solid #1e1e1e;
  border-bottom: none;
  padding-top: 8px;
}

.adjustment-detail .module-body {
  padding: 0 0 8px;
}

/* ---- 底部区域 ---- */
.bottom-section {
  margin-top: 16px;
}

.algorithm-explanation {
  font-size: 0.88rem;
  line-height: 1.8;
}

.algorithm-explanation h3 {
  margin-top: 16px;
  margin-bottom: 6px;
  font-size: 1rem;
  color: #333;
}

.logic-chain {
  background-color: #efefef;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 10px 14px;
  margin: 8px 0 16px;
  overflow-x: auto;
}

.logic-chain code {
  font-size: 0.82rem;
  color: #1e1e1e;
  word-break: break-all;
}

.formula-box {
  background-color: #efefef;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 10px 14px;
  margin: 6px 0 12px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
  word-break: break-word;
  color: #1e1e1e;
}

.formula-box strong {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
}

.ref-note {
  color: #888;
  font-size: 0.78rem;
  margin-top: -6px;
  margin-bottom: 12px;
  border-left: 3px solid #ccc;
  padding-left: 10px;
}

/* ---- 免责声明 ---- */
.disclaimer-module .module-header {
  color: #b45309;
}

.disclaimer-content {
  font-size: 0.84rem;
  line-height: 1.8;
  color: #555;
}

.disclaimer-list {
  padding-left: 20px;
}

.disclaimer-list li {
  margin-bottom: 6px;
}

.disclaimer-list li strong {
  color: #b45309;
}

/* ---- 页脚 ---- */
.app-footer {
  text-align: center;
  margin-top: 24px;
  padding: 12px 0;
  font-size: 0.78rem;
  color: #888;
  border-top: 1px solid #ddd;
}

/* ---- 响应式 ---- */
@media (max-width: 767px) {
  .app-container {
    padding: 12px;
    max-width: 100%;
  }

  .main-content {
    flex-direction: column;
  }

  .input-panel,
  .result-panel {
    width: 100%;
    flex: auto;
    min-width: 100%;
  }

  .pace-display {
    font-size: 2rem;
  }

  .cadence-display {
    font-size: 1.5rem;
  }
}