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

:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --border: #2a2a2a;
  --text: #f0f0f0;
  --muted: #888;
  --accent: #4ade80;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header {
  padding: 24px 40px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

header .logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

header nav {
  margin-left: auto;
  display: flex;
  gap: 24px;
}

header nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

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

.hero {
  max-width: 680px;
  margin: 80px auto;
  padding: 0 24px;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero h1 span {
  color: var(--accent);
}

.hero p {
  font-size: 18px;
  color: var(--muted);
  margin-bottom: 36px;
}

.badge {
  display: inline-block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--muted);
}

.features {
  max-width: 960px;
  margin: 0 auto 80px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.feature-card .icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--muted);
}

.content {
  max-width: 720px;
  margin: 60px auto;
  padding: 0 24px 80px;
}

.content h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

.content .updated {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 40px;
}

.content h2 {
  font-size: 18px;
  font-weight: 600;
  margin: 36px 0 12px;
  color: var(--accent);
}

.content p, .content li {
  font-size: 15px;
  color: #ccc;
  margin-bottom: 10px;
}

.content ul {
  padding-left: 20px;
}

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

.form-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  margin-top: 48px;
}

.form-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.form-section p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group select option {
  background: var(--surface);
}

.btn {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.85;
}

footer {
  border-top: 1px solid var(--border);
  padding: 24px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
  gap: 12px;
}

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

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

@media (max-width: 600px) {
  header { padding: 16px 20px; }
  .hero h1 { font-size: 32px; }
  footer { flex-direction: column; text-align: center; }
}