:root {
  --bg: #0b0f14;
  --bg-elev: #121821;
  --bg-card: #161e29;
  --border: #263244;
  --text: #e6edf3;
  --muted: #93a1b3;
  --accent: #38bdf8;
  --accent-strong: #0284c7;
  --ok: #2ea043;
  --warn: #d29922;
  --err: #f85149;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --sans: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
}

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

header.site-nav {
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.brand span {
  color: var(--accent);
}

nav.links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.94rem;
}
nav.links a {
  color: var(--muted);
  font-weight: 500;
}
nav.links a.active,
nav.links a:hover {
  color: var(--text);
}

main {
  max-width: 1160px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3.5rem;
}

h1,
h2,
h3 {
  letter-spacing: -0.02em;
  line-height: 1.25;
}

h1 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  margin: 0 0 0.5rem;
}

.subtitle {
  color: var(--muted);
  margin: 0 0 1.5rem;
  max-width: 78ch;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.15rem 1.25rem;
  margin-bottom: 1.15rem;
}

.stat-box {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 0.9rem;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.stat-val {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 0.2rem;
}

.badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--muted);
}
.badge.ok {
  border-color: rgba(46, 160, 67, 0.5);
  color: #7ee787;
}
.badge.warn {
  border-color: rgba(210, 153, 34, 0.5);
  color: #f2cc60;
}
.badge.err {
  border-color: rgba(248, 81, 73, 0.5);
  color: #ffa198;
}

code,
pre {
  font-family: var(--mono);
  font-size: 0.85rem;
}

code {
  background: var(--bg-elev);
  padding: 0.12rem 0.35rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}

pre {
  background: #080c10;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem;
  overflow-x: auto;
  margin: 0.5rem 0;
  white-space: pre-wrap;
  word-break: break-word;
}

label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

input[type="text"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.65rem;
  font-family: inherit;
  font-size: 0.92rem;
  margin-bottom: 0.75rem;
}

textarea.mono-input,
input.mono-input {
  font-family: var(--mono);
  font-size: 0.85rem;
}

button,
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-strong);
  color: #fff;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 0.48rem 0.9rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
button:hover,
.btn:hover {
  background: #0369a1;
  text-decoration: none;
}
button.secondary,
.btn.secondary {
  background: var(--bg-elev);
  color: var(--text);
  border-color: var(--border);
}
button.secondary:hover,
.btn.secondary:hover {
  border-color: var(--accent);
}
button.danger {
  background: #b91c1c;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}
th,
td {
  text-align: left;
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  color: var(--muted);
  font-weight: 600;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
  margin-bottom: 0.85rem;
}

.tab-btn {
  background: var(--bg-elev);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.38rem 0.75rem;
  font-size: 0.84rem;
}
.tab-btn.active {
  background: var(--accent-strong);
  color: #fff;
  border-color: var(--accent);
}

.notice {
  border-left: 3px solid var(--accent);
  background: rgba(56, 189, 248, 0.08);
  padding: 0.75rem 0.9rem;
  border-radius: 6px;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}
.notice.warn {
  border-left-color: var(--warn);
  background: rgba(210, 153, 34, 0.1);
}
.notice.ok {
  border-left-color: var(--ok);
  background: rgba(46, 160, 67, 0.1);
}
.notice.err {
  border-left-color: var(--err);
  background: rgba(248, 81, 73, 0.1);
}

iframe.guest-preview {
  width: 100%;
  height: 360px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0f1419;
}

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.84rem;
}