:root {
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #5856d6;
  --accent-2: #007aff;
  --border: #e5e5ea;
  --radius: 16px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #fafafa 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.6;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid;
  place-items: center;
  color: white;
  font-weight: 700;
  font-size: 18px;
  box-shadow: var(--shadow);
}

h1 {
  margin: 0;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
  box-shadow: var(--shadow);
}

h2 {
  margin: 1.6rem 0 0.6rem;
  font-size: 1.1rem;
}

h2:first-child { margin-top: 0; }

p, li { color: #333; }

ul { padding-left: 1.2rem; }

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

.lang {
  margin-top: 24px;
  font-size: 0.9rem;
  color: var(--muted);
}

.btn {
  display: inline-block;
  margin-top: 18px;
  padding: 12px 18px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white !important;
  font-weight: 600;
  text-decoration: none !important;
}

footer {
  margin-top: 28px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}