:root {
  color-scheme: light dark;
  --bg: #0b1020;
  --fg: #e7ecf5;
  --muted: #93a0b8;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.10);
  --accent: #6ea8fe;
  --accent-2: #c084fc;
  --ok: #34d399;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6fb;
    --fg: #1b2333;
    --muted: #5b6678;
    --card: rgba(255, 255, 255, 0.75);
    --card-border: rgba(20, 30, 60, 0.10);
    --accent: #2563eb;
    --accent-2: #7c3aed;
    --ok: #059669;
  }
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  margin: 0;
  min-height: 100vh;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ambient gradient backdrop */
.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(48rem 48rem at 12% -10%, color-mix(in srgb, var(--accent) 28%, transparent), transparent 60%),
    radial-gradient(42rem 42rem at 105% 0%, color-mix(in srgb, var(--accent-2) 24%, transparent), transparent 60%),
    radial-gradient(60rem 40rem at 50% 120%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 70%);
}

.hero {
  padding: clamp(3rem, 8vw, 6rem) 1.5rem 2rem;
  text-align: center;
}
.hero__inner {
  max-width: 52rem;
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.25rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.01em;
}
.badge__text {
  background-image: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.dot {
  width: 0.85rem;
  height: 0.85rem;
  flex: none;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 70%, transparent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 60%, transparent); }
  70%  { box-shadow: 0 0 0 0.5rem transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

h1 {
  margin: 1rem 0 0.5rem;
  font-size: clamp(2rem, 6vw, 3.25rem);
  line-height: 1.1;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead {
  margin: 0 auto;
  max-width: 36rem;
  color: var(--muted);
}

main {
  max-width: 64rem;
  margin: 0 auto;
  padding: 1rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1.25rem;
  align-items: start;
}

.card {
  border: 1px solid var(--card-border);
  background: var(--card);
  border-radius: 1rem;
  padding: 1.25rem 1.25rem 0.75rem;
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05) inset, 0 10px 30px -20px rgba(0, 0, 0, 0.6);
}
.card h2 {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.links { list-style: none; margin: 0; padding: 0; }
.links li { padding: 0.15rem 0; }

.links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: 0.6rem;
  color: var(--fg);
  text-decoration: none;
  transition: background 0.15s ease, transform 0.15s ease;
}
.links a:hover {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  transform: translateX(2px);
}
.links__label { font-weight: 500; }
.links__arrow {
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.links a:hover .links__arrow {
  opacity: 1;
  transform: translateX(0);
}
.links__note {
  margin: 0 0 0.25rem 0.75rem;
  font-size: 0.82rem;
  color: var(--muted);
}
.param-form {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin: 0.15rem 0 0.15rem 0.75rem;
}
.param-form--stack {
  flex-direction: column;
  align-items: flex-start;
}
.param-form__label {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.82rem;
  color: var(--muted);
}
.param-form__input {
  width: 4rem;
  padding: 0.25rem 0.4rem;
  border: 1px solid color-mix(in srgb, var(--fg) 25%, transparent);
  border-radius: 0.4rem;
  background: color-mix(in srgb, var(--accent) 6%, transparent);
  color: var(--fg);
  font-size: 0.82rem;
}
.param-form__input--text {
  width: 6rem;
}

footer {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  color: var(--muted);
  font-size: 0.85rem;
}
.disclaimer { max-width: 44rem; }
.footer__links a { color: var(--accent); }