*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f5f8fa;
  --card-bg: #ffffff;
  --border: #d7e1e7;
  --text: #0a2233;
  --text-muted: #4a6072;
  --primary: #023047;
  --accent: #f17300;
  --radius: 16px;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: underline; }
a:hover { color: var(--primary); }

.card p a:hover { color: var(--accent); }

.brand-by a { text-decoration: none; }

.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;
}

.site-nav {
  display: flex;
  align-items: center;
  padding: 14px 24px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand img {
  height: 40px;
  width: auto;
  display: block;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--primary);
}

.brand-by {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}

main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 64px 16px 32px;
}

.card {
  width: 100%;
  max-width: 620px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 10px 25px -5px rgba(2,48,71,0.08), 0 8px 10px -6px rgba(2,48,71,0.06);
  text-align: center;
}

.card h1 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.card p {
  color: var(--text-muted);
}