:root {
  --bg: #0b0d12;
  --surface: #14171f;
  --surface-2: #1c2029;
  --border: #2a2f3a;
  --text: #eef0f4;
  --text-muted: #9aa3b2;
  --primary: #7c3aed;
  --primary-soft: rgba(124, 58, 237, 0.15);
  --max: 720px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard",
    "Apple SD Gothic Neo", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 80px;
}

header.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 0 56px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 56px;
}

header.brand .logo {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
}

header.brand .name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

header.brand a {
  color: inherit;
  text-decoration: none;
}

h1 {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1.2px;
  line-height: 1.15;
  margin-bottom: 16px;
}

h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.4px;
  margin: 40px 0 12px;
  color: var(--text);
}

h2:first-of-type {
  margin-top: 0;
}

p {
  color: var(--text-muted);
  margin-bottom: 12px;
}

p strong {
  color: var(--text);
}

ul {
  color: var(--text-muted);
  padding-left: 22px;
  margin-bottom: 12px;
}

ul li {
  margin-bottom: 6px;
}

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

a:hover {
  text-decoration: underline;
}

.tagline {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 40px;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}

.feature h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.feature p {
  font-size: 14px;
  margin: 0;
}

.cta {
  display: inline-block;
  padding: 14px 24px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  font-weight: 700;
  margin-top: 8px;
}

.cta:hover {
  background: #6d28d9;
  text-decoration: none;
}

.muted-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 14px;
  color: var(--text-muted);
  margin: 24px 0;
}

footer {
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
}

footer a {
  color: var(--text-muted);
}

footer a:hover {
  color: var(--text);
}

.legal-meta {
  background: var(--surface-2);
  border-left: 3px solid var(--primary);
  padding: 12px 16px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.lang-toggle {
  text-align: right;
  margin-bottom: 24px;
  font-size: 14px;
}

.lang-toggle a {
  margin-left: 12px;
  color: var(--text-muted);
}

.lang-toggle a.active {
  color: var(--primary);
  font-weight: 600;
}

@media (max-width: 540px) {
  .container { padding: 32px 20px 64px; }
  h1 { font-size: 32px; }
  h2 { font-size: 19px; }
}