:root {
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --fg: #1a1d23;
  --fg-muted: #5b6472;
  --border: #e4e7ec;
  --accent: #2e6ee6;
  --accent-fg: #ffffff;
  --accent-hover: #2557bd;
  --success: #1e8e5a;
  --danger: #d1453b;
  --card-shadow: 0 1px 3px rgba(20, 24, 30, 0.06), 0 1px 2px rgba(20, 24, 30, 0.04);
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --bg-alt: #1b1e24;
    --fg: #eef0f3;
    --fg-muted: #9aa3b0;
    --border: #2a2e36;
    --accent: #5b8def;
    --accent-fg: #0d1117;
    --accent-hover: #7ba3f2;
    --success: #4ade9a;
    --danger: #ff7a70;
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
}

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px;
}

header.site {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--fg);
}

.brand img { width: 28px; height: 28px; border-radius: 6px; }

nav.site a {
  color: var(--fg-muted);
  text-decoration: none;
  margin-left: 24px;
  font-size: 0.95rem;
}

nav.site a:hover { color: var(--fg); }

.lang-switcher { display: inline-flex; margin-left: 24px; }
.lang-switcher select {
  font-size: 0.85rem;
  color: var(--fg-muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
}

.hero {
  padding: 72px 0 56px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}

.hero p.lede {
  color: var(--fg-muted);
  font-size: 1.15rem;
  max-width: 560px;
  margin: 0 auto 32px;
}

.cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.btn:disabled { opacity: 0.6; cursor: default; }

.note {
  color: var(--fg-muted);
  font-size: 0.88rem;
  margin-top: 10px;
}

section.features {
  padding: 40px 0 64px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.feature-card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.feature-card p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.92rem;
}

section.pricing {
  padding: 24px 0 72px;
}

section.pricing h2 {
  text-align: center;
  font-size: 1.6rem;
  margin-bottom: 8px;
}

section.pricing p.sub {
  text-align: center;
  color: var(--fg-muted);
  margin-bottom: 36px;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  max-width: 680px;
  margin: 0 auto;
}

.plan-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
}

.plan-card.highlight {
  border-color: var(--accent);
  position: relative;
}

.plan-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.plan-name { font-weight: 700; font-size: 1.1rem; margin-bottom: 4px; }
.plan-price { font-size: 2rem; font-weight: 700; margin: 8px 0 18px; }
.plan-price span { font-size: 0.95rem; font-weight: 500; color: var(--fg-muted); }

.plan-features {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  color: var(--fg-muted);
  font-size: 0.92rem;
  flex: 1;
}
.plan-features li { padding: 6px 0; border-top: 1px solid var(--border); }
.plan-features li:first-child { border-top: none; }

footer.site {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--fg-muted);
  font-size: 0.85rem;
  text-align: center;
}

.card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 480px;
  margin: 64px auto;
  text-align: center;
}

.card h1 { font-size: 1.4rem; margin-top: 0; }

.key-box {
  display: flex;
  gap: 8px;
  margin: 20px 0;
}

.key-box input {
  flex: 1;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
}

form.inline {
  display: flex;
  gap: 8px;
  margin: 20px 0;
}

form.inline input[type="email"] {
  flex: 1;
  padding: 11px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font-size: 0.95rem;
}

.status-msg {
  font-size: 0.9rem;
  margin-top: 12px;
}
.status-msg.error { color: var(--danger); }
.status-msg.success { color: var(--success); }