:root {
  --bg: #f4f8f8;
  --surface: #ffffff;
  --border: #d7e4e4;
  --text: #0f1b1c;
  --text-secondary: #526465;
  --accent: #157e86;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1213;
    --surface: #121d1e;
    --border: #203030;
    --text: #eef5f5;
    --text-secondary: #a3b5b6;
    --accent: #6fe4e0;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  line-height: 1.6;
}

.page {
  max-width: 680px;
  margin: 0 auto;
  padding: 64px 24px 100px;
}

header.app {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
}

header.app .mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #6fe4e0, #ea8fe0);
  flex-shrink: 0;
}

header.app .name {
  font-weight: 700;
  font-size: 18px;
}

h1 {
  font-size: 30px;
  font-weight: 800;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.updated {
  color: var(--text-secondary);
  font-size: 13px;
  margin: 0 0 36px;
}

h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin: 32px 0 8px;
}

p {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 0 0 4px;
}

a { color: var(--accent); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  margin-top: 8px;
}

.contact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  margin-top: 8px;
}

footer {
  margin-top: 56px;
  font-size: 12.5px;
  color: var(--text-secondary);
}

.lang-switch {
  display: inline-block;
  margin-bottom: 24px;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 5px 12px;
}