:root {
  --bg: #0f1115;
  --fg: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #7c5cff;
  --card: #171a21;
  --border: #242937;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--fg);
  background: radial-gradient(1200px 800px at 10% 10%, #151826, var(--bg));
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

header, footer {
  padding: 16px 24px;
}

header {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

.logo-badge {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #36d1dc);
  box-shadow: 0 0 18px rgba(124, 92, 255, 0.45);
}

main {
  min-height: calc(100dvh - 120px);
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 720px;
  background: color-mix(in oklab, var(--card) 92%, black);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 40px);
}

p {
  margin: 0 0 16px;
  color: var(--muted);
}

.actions {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: #1b2030;
  color: var(--fg);
  padding: 10px 14px;
  border-radius: 10px;
  text-decoration: none;
  transition: transform 0.12s ease, border-color 0.2s ease, background 0.2s ease;
  will-change: transform;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--accent) 60%, white 0%);
  background: #20263a;
}

footer {
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}