/* index.html 与 internal.html 共用的页面基础样式：设计变量、页面宽度/居中、
   Header、表单控件、提交按钮、勾选框、Loading/Error、通用标签（tags-row/tag）。
   两边各自独有的结果卡片/五行图/大运流年等展示样式仍留在各自页面的 <style> 里，
   避免为了强行共享而牵连两边结构本来就不同的部分。 */

:root {
  --bg: #0f0e0c;
  --surface: #1a1815;
  --border: #2e2a24;
  --gold: #c9a84c;
  --gold-dim: #8a6f2e;
  --text: #e8dcc8;
  --text-dim: #8a7f6e;
  --red: #c0392b;
  --blue: #2980b9;
  --radius: 12px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { background: #050504; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
  max-width: 520px;
  margin: 0 auto;
  padding-bottom: 40px;
  box-shadow: 0 0 40px rgba(0, 0, 0, .35);
}

/* Header */
.header {
  background: linear-gradient(135deg, #1a1510 0%, #2a2015 100%);
  border-bottom: 1px solid var(--gold-dim);
  padding: 20px 16px 16px;
  text-align: center;
}
.lang-switch {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: 10px;
}
.lang-btn {
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg);
  color: var(--text-dim);
  font-size: 11px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all .2s;
}
.lang-btn.active {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(201,168,76,.08);
}
.header h1 {
  font-size: 24px;
  color: var(--gold);
  letter-spacing: 6px;
  font-weight: 300;
}
.header p { font-size: 12px; color: var(--text-dim); margin-top: 4px; letter-spacing: 2px; }

/* 顶部功能导航 Tab 行：视觉语言与 .lang-btn 一致（同色板/圆角/字号），但用途不同
   （站内功能入口而非语言切换），刻意不复用 .lang-btn 类名，避免 applyLang()/
   _base.html 的 lang_switch 逻辑误伤 */
.nav-tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-top: 10px; }
.nav-tab {
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg);
  color: var(--text-dim);
  font-size: 11px;
  letter-spacing: 1px;
  text-decoration: none;
  display: inline-block;
  transition: all .2s;
}
.nav-tab:hover { border-color: var(--gold-dim); color: var(--gold); }

/* Form */
.form-card {
  margin: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
}
.section-title {
  font-size: 12px;
  color: var(--gold-dim);
  letter-spacing: 3px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.form-row {
  display: grid;
  gap: 10px;
  margin-bottom: 12px;
}
.form-row.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-row.cols-2 { grid-template-columns: 1fr 1fr; }
.form-row.cols-1 { grid-template-columns: 1fr; }
.field label {
  display: block;
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 5px;
  letter-spacing: 1px;
}
.field input, .field select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
  padding: 10px 12px;
  outline: none;
  transition: border-color .2s;
  appearance: none;
  -webkit-appearance: none;
}
.field input:focus, .field select:focus { border-color: var(--gold-dim); }
.autocomplete-wrap { position: relative; }
.autocomplete-list {
  position: absolute;
  left: 0; right: 0; top: calc(100% + 4px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 220px;
  overflow-y: auto;
  z-index: 20;
  display: none;
}
.autocomplete-list.open { display: block; }
.autocomplete-item {
  padding: 9px 12px;
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
}
.autocomplete-item:hover, .autocomplete-item.active { background: var(--bg); }
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238a7f6e' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}
.field select option { background: #1a1815; }
.gender-group { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.gender-btn {
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text-dim);
  font-size: 14px;
  cursor: pointer;
  text-align: center;
  transition: all .2s;
  letter-spacing: 2px;
}
.gender-btn.active {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(201,168,76,.08);
}
.submit-btn {
  width: 100%;
  margin-top: 18px;
  padding: 14px;
  background: linear-gradient(135deg, #8a6f2e, #c9a84c);
  border: none;
  border-radius: 10px;
  color: #0f0e0c;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 4px;
  cursor: pointer;
  transition: opacity .2s;
}
.submit-btn:disabled { opacity: .5; cursor: not-allowed; }
.submit-btn:active { opacity: .85; }
.submit-btn.secondary {
  background: transparent;
  border: 1px solid var(--gold);
  color: var(--gold);
}
.submit-row { display: flex; gap: 10px; margin-top: 18px; }
.submit-row .submit-btn { margin-top: 0; flex: 1; }
.checkbox-field {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}
.checkbox-field input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--gold);
  cursor: pointer;
}
.checkbox-field span { font-size: 13px; color: var(--text); letter-spacing: 1px; }

/* Loading */
.loading {
  display: none;
  text-align: center;
  padding: 30px;
  color: var(--text-dim);
  letter-spacing: 2px;
  font-size: 13px;
}
.spinner {
  width: 28px; height: 28px;
  border: 2px solid var(--border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Error */
.error-box {
  display: none;
  margin: 0 16px;
  background: rgba(192,57,43,.1);
  border: 1px solid rgba(192,57,43,.3);
  border-radius: 10px;
  padding: 14px 16px;
  color: #e74c3c;
  font-size: 13px;
}

/* Tags（旺衰喜忌等通用标签，五行能量条本身两边样式不同，未纳入共享） */
.tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.tag {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 1px;
}
.tag-strong { background: rgba(231,76,60,.12); border: 1px solid rgba(231,76,60,.3); color: #e74c3c; }
.tag-weak { background: rgba(41,128,185,.12); border: 1px solid rgba(41,128,185,.3); color: #2980b9; }
.tag-xi { background: rgba(39,174,96,.12); border: 1px solid rgba(39,174,96,.3); color: #2ecc71; }
.tag-ji { background: rgba(192,57,43,.12); border: 1px solid rgba(192,57,43,.3); color: #c0392b; }
.tag-label { font-size: 11px; color: var(--text-dim); align-self: center; }