/* ==========================================================================
   US Address Generator — clean, fast, zero external dependencies
   ========================================================================== */

:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --ink: #1c2430;
  --ink-2: #4a5565;
  --ink-3: #8a94a3;
  --line: #e6e9ee;
  --accent: #2563eb;
  --accent-2: #1d4ed8;
  --accent-soft: #eff4ff;
  --green: #16a34a;
  --green-soft: #ecfdf3;
  --amber: #b45309;
  --amber-soft: #fffbeb;
  --red: #dc2626;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .06);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

.container { max-width: 960px; margin: 0 auto; padding: 0 16px; }

/* ---------- header ---------- */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  max-width: 960px; margin: 0 auto; padding: 10px 16px;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; color: var(--ink); }
.logo:hover { text-decoration: none; }
.logo svg { display: block; }
.main-nav { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.main-nav a {
  padding: 6px 10px; border-radius: 8px; color: var(--ink-2); font-size: 14px;
}
.main-nav a:hover { background: var(--accent-soft); text-decoration: none; color: var(--accent); }
.main-nav a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.lang-switch {
  font-size: 13px; color: var(--ink-2); border: 1px solid var(--line);
  padding: 4px 10px; border-radius: 999px; white-space: nowrap;
}
.lang-switch:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* ---------- hero ---------- */
.hero { padding: 34px 0 10px; }
.hero h1 { font-size: 30px; margin: 0 0 10px; letter-spacing: -0.4px; }
.hero p { color: var(--ink-2); margin: 0 0 6px; font-size: 16px; max-width: 760px; }
.pill-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.pill {
  display: inline-block; font-size: 13px; color: var(--ink-2);
  background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px;
}
.pill.hot { color: var(--amber); border-color: #f3e2c3; background: var(--amber-soft); }

/* ---------- generator card ---------- */
.gen-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px; margin: 16px 0;
}
.gen-toolbar { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.gen-toolbar label { font-size: 13px; color: var(--ink-3); display: flex; align-items: center; gap: 7px; font-weight: 500; }
select, input[type="number"], input[type="text"] {
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  background: #fff;
  border: 1px solid #d8dee7;
  border-radius: 8px;
  padding: 8px 12px;
  height: 38px;
  max-width: 220px;
  transition: border-color .12s, box-shadow .12s, background-color .12s;
}
select {
  -webkit-appearance: none;
  appearance: none;
  min-width: 150px;
  padding-right: 30px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%236b7683' d='M4 6l4 4 4-4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 14px;
  cursor: pointer;
}
select:hover { border-color: #b9c2cf; }
select:focus, input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}
select:disabled { background-color: #f3f5f8; color: var(--ink-3); cursor: not-allowed; }
input::placeholder { color: var(--ink-3); }
.btn {
  font-family: inherit; font-size: 14px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: 8px; padding: 0 16px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  transition: background .12s, border-color .12s, color .12s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-2); color: #fff; }
.btn-sm { height: auto; padding: 4px 10px; font-size: 13px; }

/* ---------- result ---------- */
.result-box {
  background: #fbfcfe; border: 1px solid var(--line); border-radius: 8px;
  padding: 14px 16px; font-size: 15px;
}
.result-box .addr { font-size: 17px; line-height: 1.7; margin: 0; }
.address-line { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 4px 0; flex-wrap: wrap; }
.address-line + .address-line { border-top: 1px dashed var(--line); }
.address-line .lbl { color: var(--ink-3); font-size: 13px; width: 90px; flex-shrink: 0; }
.address-line .val { font-weight: 600; }
.address-line .actions { margin-left: auto; display: flex; gap: 6px; }
.hint { color: var(--ink-3); font-size: 13px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13.5px; }

/* ---------- tabs ---------- */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--line); margin-bottom: 16px; flex-wrap: wrap; }
.tab {
  font-family: inherit; font-size: 15px; font-weight: 600; cursor: pointer;
  background: none; border: none; border-bottom: 2px solid transparent;
  padding: 9px 14px; color: var(--ink-2); margin-bottom: -2px;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- tables ---------- */
.kv-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.kv-table th, .kv-table td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.kv-table th { color: var(--ink-3); font-weight: 500; width: 120px; }

/* ---------- batch ---------- */
.batch-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 10px; }
.batch-item {
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px;
  font-size: 13.5px; background: #fbfcfe; position: relative;
}
.batch-item .b-addr { font-weight: 600; margin: 0 0 2px; }
.batch-item .b-meta { color: var(--ink-3); font-size: 12.5px; }
.batch-item .b-copy { position: absolute; top: 8px; right: 8px; }

/* ---------- saved ---------- */
.saved-note { color: var(--ink-3); font-size: 13px; margin-top: 8px; }

/* ---------- content sections ---------- */
.content { padding: 10px 0 30px; }
.content h2 { font-size: 22px; margin: 26px 0 10px; }
.content h3 { font-size: 18px; margin: 20px 0 8px; }
.content p { color: var(--ink-2); margin: 8px 0; }
.content ul, .content ol { color: var(--ink-2); padding-left: 22px; }
.content li { margin: 4px 0; }
.content table { border-collapse: collapse; width: 100%; font-size: 14px; margin: 12px 0; }
.content th, .content td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
.content th { background: #f4f6f9; }

.state-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 6px; }
.state-grid a {
  display: block; padding: 8px 12px; background: var(--card); border: 1px solid var(--line);
  border-radius: 8px; color: var(--ink); font-size: 14px;
}
.state-grid a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.state-grid a small { color: var(--ink-3); margin-left: 4px; font-size: 12px; }

/* ---------- FAQ ---------- */
.faq-item { border: 1px solid var(--line); border-radius: 8px; background: var(--card); margin: 10px 0; }
.faq-item summary { cursor: pointer; padding: 12px 16px; font-weight: 600; font-size: 15px; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--ink-3); font-weight: 400; }
.faq-item[open] summary::after { content: "−"; }
.faq-item .faq-body { padding: 0 16px 14px; color: var(--ink-2); font-size: 14.5px; }

/* ---------- breadcrumb ---------- */
.breadcrumb { font-size: 13px; color: var(--ink-3); margin: 14px 0 4px; }
.breadcrumb a { color: var(--ink-3); }
.breadcrumb a:hover { color: var(--accent); }

/* ---------- article list ---------- */
.article-list a { display: block; padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--ink); }
.article-list a:hover { text-decoration: none; }
.article-list .t { font-weight: 600; }
.article-list .d { color: var(--ink-3); font-size: 13.5px; }

/* ---------- region pager (prev/next) ---------- */
.region-pager {
  display: flex; justify-content: space-between; gap: 10px;
  margin: 14px 0 4px; flex-wrap: wrap;
}
.region-pager .rp-link {
  display: inline-block; background: var(--card); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 16px; color: var(--ink); font-size: 14px;
}
.region-pager .rp-link:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* ---------- ad slot (placeholder, only becomes real after AdSense approval) ---------- */
.ad-slot {
  background: var(--card); border: 1px dashed var(--line); border-radius: 8px;
  text-align: center; color: var(--ink-3); font-size: 12px;
  padding: 40px 16px; margin: 18px 0; min-height: 90px;
}

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--card); margin-top: 40px; padding: 26px 0; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 20px; }
.site-footer h4 { margin: 0 0 8px; font-size: 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 4px 0; }
.site-footer a { color: var(--ink-2); font-size: 13.5px; }
.site-footer a:hover { color: var(--accent); }
.footer-bottom { color: var(--ink-3); font-size: 13px; margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--line); }

/* ---------- notice ---------- */
.notice {
  background: var(--amber-soft); border: 1px solid #f3e2c3; color: var(--amber);
  border-radius: 8px; padding: 10px 14px; font-size: 13.5px; margin: 12px 0;
}
.notice-green { background: var(--green-soft); border-color: #d3f2dd; color: #166534; }

/* ---------- toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px);
  background: #111827; color: #fff; padding: 9px 18px; border-radius: 999px;
  font-size: 14px; opacity: 0; pointer-events: none; transition: opacity .18s, transform .18s; z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- responsive ---------- */
@media (max-width: 640px) {
  .hero h1 { font-size: 24px; }
  .address-line .actions { width: 100%; margin-left: 0; }
  .address-line .lbl { width: 72px; }
}