:root {
  --bg: #f6f6f3;
  --surface: #ffffff;
  --text: #1b1b19;
  --muted: #6d6d66;
  --line: #e3e3dc;
  --accent: #1f4e79;
  --accent-hover: #173b5c;
  --ok: #1a7f4b;
  --warn: #8a5a00;
  --err: #b3261e;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 20, 15, .05), 0 8px 24px rgba(20, 20, 15, .05);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141513;
    --surface: #1c1e1b;
    --text: #ecece6;
    --muted: #a2a29a;
    --line: #2e302c;
    --accent: #7fb2e5;
    --accent-hover: #a5c9ee;
    --ok: #6fd39b;
    --warn: #e0b25c;
    --err: #ff8a80;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre { font-family: var(--mono); font-size: .9em; }
pre {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
}

.wrap { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 650; }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: inline-grid; place-items: center;
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 750; letter-spacing: .04em;
}
@media (prefers-color-scheme: dark) { .brand-mark { color: #141513; } }
.site-header nav { display: flex; align-items: center; gap: 20px; font-size: 14.5px; }
.site-header nav a { color: var(--muted); }
.site-header nav a:hover { color: var(--text); }
.inline { display: inline; }
button.link {
  background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--muted); font: inherit;
}
button.link:hover { color: var(--text); }

main { padding: 44px 0 80px; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 34px;
  color: var(--muted);
  font-size: 13.5px;
}
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---- hero ---- */
.hero { padding: 28px 0 40px; max-width: 760px; }
.eyebrow {
  margin: 0 0 10px;
  font-size: 12px; font-weight: 700; letter-spacing: .18em;
  color: var(--accent);
}
.hero h1 { margin: 0 0 14px; font-size: clamp(30px, 5vw, 46px); line-height: 1.15; letter-spacing: -.02em; }
.lead { margin: 0 0 26px; font-size: 18px; color: var(--muted); }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 34px; }

.stats { display: flex; gap: 40px; }
.stats > div { display: flex; flex-direction: column; }
.stats strong { font-size: 28px; line-height: 1.2; }
.stats span { color: var(--muted); font-size: 13.5px; }

/* ---- buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  font: inherit; font-weight: 600; font-size: 14.5px;
  cursor: pointer; transition: background .15s, border-color .15s, transform .05s;
}
.btn:hover { text-decoration: none; border-color: var(--muted); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
@media (prefers-color-scheme: dark) { .btn.primary { color: #141513; } }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, var(--line)); }
.btn.danger:hover { background: color-mix(in srgb, var(--err) 8%, transparent); }
.btn.tiny { padding: 5px 11px; font-size: 13px; border-radius: 8px; }

/* ---- cards ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px 28px;
  margin-bottom: 22px;
}
.card h1 { margin-top: 0; font-size: 26px; }
.card h2 { margin: 0 0 10px; font-size: 18px; }
.card p:last-child { margin-bottom: 0; }
.card.narrow { max-width: 640px; margin-left: auto; margin-right: auto; }
.card.center { text-align: center; }
.card.prose ul { margin: 8px 0 0; padding-left: 20px; }
.card.prose li { margin-bottom: 6px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-bottom: 22px; }
.grid .card { margin-bottom: 0; }
.grid .card p { color: var(--muted); font-size: 14.5px; }

.page-head { margin-bottom: 22px; }
.page-head h1 { margin: 4px 0 6px; font-size: 30px; }
.page-head p { margin: 0; }

/* ---- forms ---- */
.form { display: flex; flex-direction: column; gap: 18px; margin-top: 22px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-weight: 600; font-size: 14.5px; }
.form input, .form textarea, .reject-form input {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg); color: var(--text);
  font: inherit; font-weight: 400;
}
.form input:focus, .form textarea:focus, .reject-form input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-color: var(--accent);
}
.form small { color: var(--muted); font-weight: 400; font-size: 12.5px; }
.form .check { flex-direction: row; align-items: flex-start; gap: 10px; font-weight: 400; }
.form .check input { width: auto; margin-top: 4px; }
.req { color: var(--err); }
.code-input { letter-spacing: .4em; font-family: var(--mono); font-size: 22px; text-align: center; }
.key-form { margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); }

/* ---- flash ---- */
.flash {
  padding: 12px 16px; border-radius: 10px; margin-bottom: 18px;
  font-size: 14.5px; border: 1px solid;
}
.flash.ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 9%, transparent); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.flash.warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 9%, transparent); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
.flash.error { color: var(--err); background: color-mix(in srgb, var(--err) 8%, transparent); border-color: color-mix(in srgb, var(--err) 30%, transparent); }

/* ---- admin ---- */
.stats-admin { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 22px; }
.stats-admin .stat {
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 18px; color: var(--text);
}
.stats-admin .stat:hover { text-decoration: none; border-color: var(--muted); }
.stats-admin .stat.on { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.stats-admin .stat strong { display: block; font-size: 24px; }
.stats-admin .stat span { color: var(--muted); font-size: 13px; }

.table-card { padding: 6px; overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.table th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; }
.table tbody tr:last-child td { border-bottom: 0; }
.table tbody tr:hover { background: color-mix(in srgb, var(--accent) 4%, transparent); }

.pill { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 600; }
.s-pending_email, .s-pending_approval { color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent); }
.s-approved { color: var(--ok); background: color-mix(in srgb, var(--ok) 12%, transparent); }
.s-rejected, .s-disabled { color: var(--err); background: color-mix(in srgb, var(--err) 10%, transparent); }

.kv { display: grid; grid-template-columns: 130px 1fr; gap: 10px 18px; margin: 0; }
.kv dt { color: var(--muted); font-size: 13.5px; }
.kv dd { margin: 0; word-break: break-all; }
.keybox { margin-top: 20px; }
.keybox summary { cursor: pointer; color: var(--muted); font-size: 14px; }
.keybox pre { margin-top: 10px; white-space: pre-wrap; word-break: break-all; }

.actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.actions.center { justify-content: center; }
.reject-form { display: flex; gap: 10px; align-items: center; }
.reject-form input { width: 240px; }

.badge { display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: 12.5px; font-weight: 700; margin-bottom: 8px; }
.badge.ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 12%, transparent); }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }

@media (max-width: 640px) {
  .wrap { width: calc(100% - 28px); }
  .site-header nav { gap: 12px; }
  .stats-admin { grid-template-columns: repeat(2, 1fr); }
  .kv { grid-template-columns: 1fr; gap: 2px; }
  .kv dd { margin-bottom: 10px; }
  .reject-form { flex-wrap: wrap; }
  .reject-form input { width: 100%; }
}