:root{
  --bg: #0b0f17;
  --panel: #0f1623;
  --panel-2: #0c1320;
  --text: #e7eefc;
  --muted: #b4c0db;
  --border: rgba(231, 238, 252, 0.12);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --radius: 14px;
  --focus: rgba(120, 170, 255, 0.55);

  --ok: #33d17a;
  --warn: #ffb000;
  --bad: #ff5b5b;
  --info: #6aa6ff;

  --maxw: 980px;
  --pad: 18px;
  --gap: 14px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

@media (prefers-color-scheme: light){
  :root{
    --bg: #f6f8fc;
    --panel: #ffffff;
    --panel-2: #f3f6ff;
    --text: #0d1526;
    --muted: #3b4a68;
    --border: rgba(13, 21, 38, 0.12);
    --shadow: 0 10px 30px rgba(14, 30, 60, 0.10);
    --focus: rgba(40, 115, 255, 0.35);
  }
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(1200px 700px at 20% 10%, rgba(106,166,255,0.18), transparent 55%),
              radial-gradient(900px 600px at 80% 20%, rgba(51,209,122,0.10), transparent 55%),
              var(--bg);
  line-height: 1.45;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; text-underline-offset: 3px; }

.hidden{ display: none !important; }

.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 22px var(--pad);
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px var(--pad);
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.badge{
  font-size: 12px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: color-mix(in srgb, var(--panel) 70%, transparent);
}

.nav{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
}

.nav a{
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--muted);
}
.nav a:hover{
  border-color: var(--border);
  background: color-mix(in srgb, var(--panel) 75%, transparent);
  color: var(--text);
  text-decoration: none;
}

.hero{
  padding: 18px 0 10px;
}
.h-title{
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.1;
  margin: 0 0 10px;
}
.h-sub{
  margin: 0;
  color: var(--muted);
  max-width: 75ch;
}

.grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}
@media (min-width: 900px){
  .grid.cols-2{ grid-template-columns: 1.2fr 0.8fr; }
  .grid.cols-3{ grid-template-columns: repeat(3, 1fr); }
}

.card{
  border: 1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 92%, transparent), var(--panel));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-inner{ padding: 16px; }
.card h2, .card h3{
  margin: 0 0 10px;
  font-size: 16px;
}
.card p{ margin: 0; color: var(--muted); }

.form{
  display: grid;
  gap: 12px;
}
.field{
  display: grid;
  gap: 6px;
}
label{
  font-size: 13px;
  color: var(--muted);
}
input, select, textarea{
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel-2) 84%, transparent);
  color: var(--text);
  outline: none;
}
textarea{ min-height: 120px; resize: vertical; }
input:focus, select:focus, textarea:focus{
  box-shadow: 0 0 0 4px var(--focus);
  border-color: color-mix(in srgb, var(--focus) 55%, var(--border));
}

.field .hint{
  font-size: 12px;
  color: var(--muted);
}
.field .err{
  font-size: 12px;
  color: var(--bad);
  display: none;
}
.field.invalid .err{ display: block; }
.field.invalid input,
.field.invalid select,
.field.invalid textarea{
  border-color: color-mix(in srgb, var(--bad) 60%, var(--border));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--bad) 25%, transparent);
}

.dangerText{ color: var(--bad); font-size: 12px; }
.help{ font-size: 12px; color: var(--muted); }

.actions{
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 90%, transparent);
  color: var(--text);
  cursor: pointer;
  user-select: none;
  font-weight: 700;
}
.btn:hover{
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  text-decoration: none;
}
.btn.primary{
  border-color: color-mix(in srgb, var(--info) 35%, var(--border));
  background: linear-gradient(180deg, color-mix(in srgb, var(--info) 22%, var(--panel)), var(--panel));
}
.btn:disabled{
  opacity: 0.6;
  cursor: not-allowed;
}

.notice{
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 12px 12px;
  background: color-mix(in srgb, var(--panel) 80%, transparent);
  display: grid;
  gap: 8px;
}
.notice .title{
  font-weight: 800;
  font-size: 13px;
}
.notice .msg{
  color: var(--muted);
  font-size: 13px;
}
.notice.ok{ border-color: color-mix(in srgb, var(--ok) 45%, var(--border)); }
.notice.bad{ border-color: color-mix(in srgb, var(--bad) 50%, var(--border)); }
.notice.info{ border-color: color-mix(in srgb, var(--info) 40%, var(--border)); }
.notice.warn{ border-color: color-mix(in srgb, var(--warn) 45%, var(--border)); }

.meta{
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

details{
  border-top: 1px dashed var(--border);
  padding-top: 10px;
}
summary{
  cursor: pointer;
  color: var(--muted);
  font-size: 13px;
}
pre{
  margin: 10px 0 0;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: color-mix(in srgb, var(--panel-2) 88%, transparent);
  overflow: auto;
  font-family: var(--mono);
  font-size: 12px;
}

.spinner{
  width: 16px;
  height: 16px;
  border-radius: 999px;
  border: 2px solid color-mix(in srgb, var(--muted) 30%, transparent);
  border-top-color: var(--text);
  animation: spin 0.9s linear infinite;
}
@keyframes spin{ to { transform: rotate(360deg); } }

.site-footer{
  margin-top: 28px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
}
.footer-inner{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px var(--pad);
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.small{
  font-size: 12px;
  color: var(--muted);
}