:root {
  --bg-deep: #0b1020;
  --bg-panel: #131a33;
  --bg-panel-alt: #1a2342;
  --text-main: #e6ecff;
  --text-muted: #8f9bc4;
  --accent: #b7c9ff;
  --accent-glow: #dbe6ff;
  --border: #26325c;
  --danger: #ffb4c2;
  --success: #b7ffd8;
  --warning: #ffe9b3;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background: radial-gradient(1200px 800px at 50% -10%, #1b2447 0%, #0b1020 60%, #070b18 100%);
  background-attachment: fixed;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(1px 1px at 20% 15%, rgba(255,255,255,0.15) 0, transparent 100%),
    radial-gradient(1px 1px at 45% 10%, rgba(255,255,255,0.12) 0, transparent 100%),
    radial-gradient(1px 1px at 75% 25%, rgba(255,255,255,0.10) 0, transparent 100%),
    radial-gradient(1px 1px at 30% 40%, rgba(255,255,255,0.08) 0, transparent 100%),
    radial-gradient(1px 1px at 85% 35%, rgba(255,255,255,0.09) 0, transparent 100%),
    radial-gradient(1px 1px at 10% 60%, rgba(255,255,255,0.07) 0, transparent 100%),
    radial-gradient(1px 1px at 60% 55%, rgba(255,255,255,0.08) 0, transparent 100%),
    radial-gradient(1px 1px at 50% 80%, rgba(255,255,255,0.06) 0, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 120ms ease-out;
}
a:hover { color: var(--accent-glow); }
a:focus-visible {
  outline: 2px solid var(--accent-glow);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 24px 40px;
  position: relative;
  z-index: 1;
}

.header {
  padding: 32px 0 24px;
  text-align: center;
}
.header h1 {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin: 0 0 8px;
  color: var(--text-main);
}
.header p {
  color: var(--text-muted);
  margin: 0;
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  margin-bottom: 20px;
}
.panel-alt {
  background: var(--bg-panel-alt);
}
.panel > h2:first-child,
.panel > h3:first-child {
  margin-top: 0;
}

h1, h2, h3 {
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-main);
}

.muted { color: var(--text-muted); }
.tight { margin: 0; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.mb-12 { margin-bottom: 12px; }
.text-sm { font-size: 13px; }

input[type="text"], input[type="url"], textarea {
  width: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--text-main);
  caret-color: var(--accent);
  font-family: inherit;
  font-size: 15px;
  outline: none;
  transition: border-color 120ms ease-out, box-shadow 120ms ease-out;
}
input[type="text"]:focus, input[type="url"]:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(219,230,255,0.4);
}

.form-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.form-row input { flex: 1; min-width: 200px; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #0b1020;
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 120ms ease-out, box-shadow 120ms ease-out, transform 120ms ease-out;
}
.btn:hover {
  background: var(--accent-glow);
  box-shadow: 0 2px 12px rgba(183,201,255,0.35);
}
.btn:focus-visible {
  outline: 2px solid var(--accent-glow);
  outline-offset: 2px;
}
.btn-secondary {
  background: transparent;
  color: var(--accent);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--bg-panel-alt);
  color: var(--accent-glow);
}

pre, code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}
pre {
  background: var(--bg-panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  color: var(--text-main);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.trace { white-space: pre-wrap; word-break: break-all; }
.result-box { padding: 16px; }
code {
  background: var(--bg-panel-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 6px;
}

.alert {
  border-radius: 10px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  margin: 16px 0;
}
.alert-danger {
  background: rgba(255,180,194,0.08);
  border-color: rgba(255,180,194,0.25);
  color: var(--danger);
}
.alert-success {
  background: rgba(183,255,216,0.08);
  border-color: rgba(183,255,216,0.25);
  color: var(--success);
}
.alert-warning {
  background: rgba(255,233,179,0.08);
  border-color: rgba(255,233,179,0.25);
  color: var(--warning);
}

.nav {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin: 16px 0;
  flex-wrap: wrap;
}
.nav a {
  padding: 6px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
}
.nav a:hover {
  background: var(--bg-panel);
  border-color: var(--border);
}

.footer {
  text-align: center;
  padding: 24px 0;
  color: var(--text-muted);
  font-size: 13px;
}

.profile-card {
  display: flex;
  gap: 16px;
  align-items: center;
}
.profile-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-panel-alt);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}