/* 全站界面层（chrome）—— 设计令牌 + 顶栏 + 页脚。
   每页最先加载：首页随后挂 home.css，其余页挂 app.css。
   页面私有组件不再自带令牌/顶栏，统一从这里取。 */

:root {
  /* 青 + 珊瑚 */
  --teal:      #4ecdc4;
  --teal-d:    #34b3a9;
  --teal-l:    #7fcdd1;
  --teal-050:  #e8f7f6;
  --teal-100:  #d3efed;
  --coral:     #ff6b6b;
  --coral-d:   #f05a5a;
  --coral-050: #ffeceb;

  --ink:   #2f3e3e;
  --body:  #4a5c5c;
  --muted: #7d9191;
  --line:  #e2ecec;

  --bg:   #f2f7f7;
  --card: #ffffff;

  --r-lg:   22px;
  --r-md:   14px;
  --r-pill: 999px;

  --header-h: 52px;

  --shadow:    0 10px 30px rgba(20, 80, 80, .08);
  --shadow-sm: 0 4px 14px rgba(20, 80, 80, .06);
  --shadow-lg: 0 22px 60px rgba(20, 80, 80, .14);

  /* 旧名别名：让 app.css 组件与 map.php 内联样式零改动跟着变青 */
  --brand:  var(--teal-d);
  --ok:     #16794b;
  --err:    var(--coral-d);
  --radius: var(--r-md);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--body);
  font: 15px/1.6 -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* 英文界面：Latin 优先字体栈（不改变字号）/ 中文界面视觉零变化 */
html[lang="en"] body {
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

h1, h2, h3 { color: var(--ink); margin: 0 0 .4em; font-weight: 700; }
a { color: var(--teal-d); text-decoration: none; }

.inline { display: inline; margin: 0; }
.linklike { border: 0; background: none; padding: 0; cursor: pointer; color: var(--teal-d); font: inherit; }
.linklike:hover { text-decoration: underline; }

/* ── 顶栏 ───────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 16px;
  padding: 10px clamp(14px, 4vw, 40px);
  background: linear-gradient(100deg, var(--teal-d), var(--teal) 60%, var(--teal-l));
  color: #fff;
  box-shadow: 0 6px 22px rgba(30, 120, 115, .22);
}
.site-header .brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; letter-spacing: .12em; font-size: 15px; }
.site-header .brand img { height: 30px; display: block; }
.site-header nav { margin-left: auto; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.site-header nav a, .site-header nav .linklike {
  color: #fff; padding: 6px 12px; border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .14); font-size: 13px;
  border: 0; cursor: pointer; font-family: inherit;
}
.site-header nav a:hover, .site-header nav .linklike:hover { background: rgba(255, 255, 255, .28); }
.site-header nav a[aria-current="page"] { background: rgba(255, 255, 255, .92); color: var(--teal-d); font-weight: 700; }
.site-header nav form.inline { display: inline; margin: 0; }

/* 语言开关：中文 / EN 两态药丸；当前语言高亮 */
.site-header .lang-switch {
  display: inline-flex; align-items: center; gap: 2px;
  padding: 2px; border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .14);
}
.site-header > .lang-switch { margin-left: auto; }
.site-header .lang-switch a {
  color: #fff; padding: 3px 7px; border-radius: var(--r-pill);
  font-size: 11px; line-height: 1.2;
  transition: background .16s ease, color .16s ease;
}
.site-header .lang-switch a:hover { background: rgba(255, 255, 255, .24); }
.site-header .lang-switch a.on { background: rgba(255, 255, 255, .92); color: var(--teal-d); font-weight: 700; }

/* ── 页脚 ───────────────────────────────────────────── */
.site-footer {
  margin-top: clamp(28px, 5vw, 56px);
  padding: clamp(15px, 2.4vw, 22px) clamp(14px, 4vw, 40px);
  background: linear-gradient(180deg, #fbfdfd, var(--teal-050));
  border-top: 1px solid var(--line);
}
.sf-inner {
  max-width: 1240px; margin: 0 auto;
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 14px 22px; flex-wrap: wrap;
}
.sf-brand {
  display: inline-flex; align-items: baseline; gap: 6px;
  color: var(--muted); font-weight: 400; font-size: 12.5px; letter-spacing: .02em;
}
.sf-brand .sf-logo { font-weight: 600; font-size: 15px; line-height: 1; color: var(--teal-d); letter-spacing: 0; }
.sf-brand .sf-logo sup { font-size: .58em; color: var(--coral); font-weight: 600; }
.sf-brand b { font-size: 9px; font-weight: 500; color: var(--body); }
.sf-brand a { font-size: 9px; color: var(--muted); transition: color .16s ease; }
.sf-brand a:hover { color: var(--teal-d); }
.sf-links { display: flex; align-items: baseline; flex-wrap: wrap; }
.sf-links a {
  display: inline-flex; align-items: baseline; gap: 5px;
  padding: 1px 12px; color: var(--muted); font-size: 12px; font-weight: 400;
  border-left: 1px solid var(--line);
  transition: color .16s ease;
}
.sf-links a:first-child { border-left: 0; }
.sf-links a small { color: #a9b8b8; font-weight: 400; font-size: 11px; }
.sf-links a:hover, .sf-links a:hover small { color: var(--teal-d); }

@media (max-width: 640px) {
  .sf-inner { flex-direction: column; text-align: center; align-items: center; }
  .sf-links { justify-content: center; }
  .sf-links a { border-left: 0; }
}

@media (max-width: 560px) {
  :root { --header-h: 44px; }
  .site-header { padding: 8px 12px; gap: 8px; }
  .site-header .brand img { height: 24px; }
  .site-header nav a, .site-header nav .linklike { padding: 5px 10px; font-size: 12px; }
}

/* 校验失败弹层（首页「开始计算」前的合理性提示，替代原生 alert） */
.vmodal-mask {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 20px; background: rgba(20, 60, 60, .45);
  animation: vmodal-fade .16s ease;
}
.vmodal {
  width: 100%; max-width: 400px;
  background: var(--card); border-radius: var(--r-md);
  box-shadow: var(--shadow-lg); padding: 20px 20px 16px;
  animation: vmodal-pop .18s ease;
}
.vmodal-title { color: var(--ink); font-weight: 700; font-size: 16px; margin-bottom: 10px; }
.vmodal-list { margin: 0 0 16px; padding-left: 18px; color: var(--body); font-size: 14px; line-height: 1.7; }
.vmodal-actions { text-align: right; }
.vmodal-btn {
  padding: 8px 20px; border: 0; border-radius: var(--r-pill);
  background: linear-gradient(100deg, var(--coral), var(--coral-d)); color: #fff;
  font: inherit; font-weight: 600; cursor: pointer;
  box-shadow: 0 10px 22px rgba(255, 107, 107, .32);
}
.vmodal-btn:hover { transform: translateY(-1px); }
@keyframes vmodal-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes vmodal-pop { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: none; } }