/* style.css — 签证滞留时间计算器（现代简洁风格） */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --navy: #0f172a;
  --ink: #1e293b;
  --muted: #64748b;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --ok-bg: #dcfce7; --ok-fg: #166534;
  --over-bg: #fee2e2; --over-fg: #991b1b;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.6; font-size: 15px;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Header ---------- */
.site-header {
  background: var(--navy); color: #fff;
  position: sticky; top: 0; z-index: 10;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding: 6px 0; }
.brand { display: flex; align-items: center; gap: 8px; min-width: 0; }
.brand .logo { font-size: 20px; }
.brand div { display: flex; align-items: baseline; gap: 8px; min-width: 0; }
.brand h1, .brand .site-name { font-size: 15px; font-weight: 600; white-space: nowrap; }
.brand .sub { font-size: 11px; opacity: 0.7; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.site-nav { display: flex; flex-wrap: wrap; gap: 2px; }
.site-nav a {
  color: rgba(255,255,255,0.8); font-size: 13px;
  padding: 6px 12px; border-radius: 8px; transition: background 0.15s;
}
.site-nav a:hover { background: rgba(255,255,255,0.12); color: #fff; text-decoration: none; }
.site-nav a.active { background: rgba(255,255,255,0.15); color: #fff; }

/* ---------- Cards ---------- */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  margin: 16px 0; box-shadow: var(--shadow);
  scroll-margin-top: 60px;
}
.card h2, .card h1 { font-size: 17px; font-weight: 600; color: var(--navy); margin-bottom: 8px; }
.card > h1 { margin-top: 0; }
.hint { color: var(--muted); font-size: 13px; margin: 4px 0 12px; }
.detail { color: var(--muted); font-size: 13px; margin: 8px 0 0; }

/* ---------- Forms ---------- */
.form-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 8px 0; }
.form-row label { font-size: 13px; color: var(--muted); }
input[type="date"], input[type="text"], select {
  font: inherit; font-size: 14px;
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: #fff; color: var(--ink);
}
input[type="text"] { min-width: 120px; }
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: -1px; border-color: var(--primary); }

.btn {
  font: inherit; font-size: 14px; font-weight: 500; cursor: pointer;
  padding: 8px 16px; border: 1px solid var(--border); border-radius: 8px;
  background: #fff; color: var(--ink); transition: all 0.15s;
}
.btn:hover { background: #f1f5f9; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.danger { color: #dc2626; border-color: #fecaca; }
.btn.danger:hover { background: #fef2f2; }
.toolbar { margin: 6px 0 10px; display: flex; gap: 8px; }

/* ---------- Results ---------- */
.result-panel {
  display: flex; flex-wrap: wrap; align-items: center; gap: 18px;
  background: var(--primary-light); border: 1px solid #bfdbfe;
  border-radius: var(--radius); padding: 16px; margin-top: 10px;
}
.result-panel.hidden { display: none; }
.big-number { display: flex; flex-direction: column; align-items: center; min-width: 130px; }
.big-number span { font-size: 40px; font-weight: 700; color: var(--primary); line-height: 1.1; }
.big-number small { color: var(--muted); font-size: 12px; }
.kv { list-style: none; padding: 0; font-size: 14px; flex: 1; min-width: 200px; }
.kv li { margin: 3px 0; }
.badge { font-size: 14px; font-weight: 600; padding: 8px 18px; border-radius: 24px; }
.badge.ok, .pill.ok { background: var(--ok-bg); color: var(--ok-fg); }
.badge.full, .pill.full { background: #fef3c7; color: #92400e; }
.badge.over, .pill.over { background: var(--over-bg); color: var(--over-fg); }
.pill { padding: 2px 10px; border-radius: 12px; font-size: 12px; font-weight: 500; }
.pill.plain-p { background: #f1f5f9; color: var(--muted); border: 1px solid var(--border); }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { border: 1px solid var(--border); padding: 8px 12px; text-align: center; }
th { background: #f8fafc; color: var(--navy); font-weight: 600; font-size: 13px; }
td.note { white-space: normal; min-width: 90px; }
.del-btn { border: none; background: none; cursor: pointer; color: #dc2626; font-size: 13px; font-weight: 500; }
.del-btn:hover { text-decoration: underline; }
.date-cell {
  border: none; background: none; cursor: pointer;
  font: inherit; color: var(--primary); font-weight: 500;
  padding: 2px 6px; border-radius: 6px;
}
.date-cell:hover { background: var(--primary-light); }
.date-td input[type="date"] { width: 130px; padding: 4px 6px; }

/* ---------- Calendar ---------- */
.summary-box {
  display: flex; flex-wrap: wrap; gap: 8px 20px;
  background: var(--primary-light); border: 1px solid #bfdbfe;
  border-radius: 10px; padding: 12px 16px; font-size: 13px; margin-bottom: 12px;
}
.sum-item b { color: var(--navy); }
#cal-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 12px; }
.month { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; background: #fff; }
.month h3 { margin: 0; font-size: 12px; text-align: center; background: #f1f5f9; color: var(--navy); padding: 5px 0; font-weight: 600; }
.mgrid { display: grid; grid-template-columns: repeat(7, 1fr); }
.mgrid .dow { font-size: 10px; text-align: center; color: var(--muted); padding: 3px 0; }
.cday {
  aspect-ratio: 1; font-size: 12px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; border-radius: 6px; margin: 1px; transition: all 0.15s;
}
.cday:hover { transform: scale(1.2); outline: 2px solid var(--primary); }
.cday.ok { background: var(--ok-bg); color: var(--ok-fg); }
.cday.over { background: var(--over-bg); color: var(--over-fg); }
.cday.plain { background: #fff; color: #94a3b8; }
.cday.blank { background: transparent; cursor: default; }

/* ---------- Article Pages ---------- */
.article { line-height: 1.8; font-size: 15px; }
.article h1 { font-size: 26px; color: var(--navy); margin: 0 0 4px; font-weight: 700; }
.article h2 { font-size: 20px; color: var(--navy); border-bottom: 2px solid var(--border); padding-bottom: 8px; margin: 28px 0 14px; font-weight: 600; }
.article h3 { font-size: 16px; color: var(--navy); margin: 20px 0 10px; font-weight: 600; }
.article p { margin: 10px 0; }
.article ul, .article ol { margin: 8px 0 8px 24px; }
.article li { margin: 4px 0; }
.article blockquote {
  border-left: 4px solid var(--primary); background: var(--primary-light);
  padding: 12px 16px; margin: 14px 0; border-radius: 0 8px 8px 0;
}
.article blockquote p { margin: 0; }
.article table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 14px 0; }
.article th, .article td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; }
.article th { background: #f8fafc; color: var(--navy); font-weight: 600; }
.article .updated { color: var(--muted); font-size: 13px; }

/* ---------- Footer ---------- */
.site-footer {
  background: #f1f5f9; border-top: 1px solid var(--border);
  color: var(--muted); font-size: 13px; padding: 20px 0; margin-top: 24px;
}
.site-footer p { margin: 4px 0; }
.dim { opacity: 0.8; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  #cal-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 640px) {
  #cal-grid { grid-template-columns: repeat(2, 1fr); }
  .brand .sub { display: none; }
}
@media (max-width: 380px) {
  #cal-grid { grid-template-columns: 1fr; }
  .brand h1, .brand .site-name { font-size: 14px; }
  .site-nav { order: 3; width: 100%; }
}

/* ---------- Language switch ---------- */
.lang-switch { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.lang-switch a {
  font-size: 12px; color: rgba(255,255,255,0.8);
  padding: 4px 10px; border-radius: 8px; text-decoration: none;
}
.lang-switch a:hover { background: rgba(255,255,255,0.12); color: #fff; }
.lang-switch a.active { background: rgba(255,255,255,0.2); color: #fff; font-weight: 600; }
.lang-switch .sep { color: rgba(255,255,255,0.4); font-size: 12px; }
@media (max-width: 700px) {
  .site-header .wrap { justify-content: center; }
  .lang-switch { margin-left: 0; }
}