:root {
  --primary: #00C896;
  --primary-dark: #007A66;
  --bg: #F7F9FB;
  --card: #FFFFFF;
  --text: #0B0F14;
  --text-secondary: #4B5563;
  --border: #E5E7EB;
  --warning: #F59E0B;
  --danger: #EF4444;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0F14;
    --card: #161B22;
    --text: #F7F9FB;
    --text-secondary: #9CA3AF;
    --border: #2A2F36;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  }
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

header.site {
  padding: 20px 20px 0;
  max-width: 720px;
  margin: 0 auto;
}

header.site .brand {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  line-height: 1.15;
}

h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 36px 0 12px;
  line-height: 1.3;
}

h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 24px 0 8px;
}

p, li {
  font-size: 1rem;
  color: var(--text);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin: 0 0 24px;
}

.meta {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0 0 24px;
}

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

a:hover, a:focus {
  text-decoration: underline;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: #ffffff;
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 24px;
  border-radius: var(--radius);
  border: 0;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease;
}

.btn:hover, .btn:focus {
  background: var(--primary-dark);
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.hero {
  padding: 40px 0 16px;
}

.features {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}

.features li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.features li:last-child {
  border-bottom: 0;
}

.features li::before {
  content: "✓";
  color: var(--primary);
  font-weight: 700;
  margin-right: 12px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin: 24px 0;
  box-shadow: var(--shadow);
}

form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 24px 0;
}

label {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 4px;
  display: block;
  color: var(--text);
}

label .opt {
  font-weight: 400;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-left: 4px;
}

input[type="text"],
textarea {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  padding: 12px 14px;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  -webkit-appearance: none;
  appearance: none;
}

input[type="text"]:focus,
textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
  border-color: var(--primary);
}

textarea {
  resize: vertical;
  min-height: 140px;
  font-family: inherit;
}

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.status {
  margin: 12px 0;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.status.ok {
  background: rgba(0, 200, 150, 0.12);
  color: var(--primary-dark);
}

.status.err {
  background: rgba(239, 68, 68, 0.12);
  color: var(--danger);
}

.status.loading {
  background: rgba(0, 0, 0, 0.04);
  color: var(--text-secondary);
}

footer.site {
  border-top: 1px solid var(--border);
  margin-top: 64px;
  padding: 32px 20px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

footer.site .row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}

footer.site nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

footer.site nav a {
  color: var(--text-secondary);
}

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

@media (max-width: 480px) {
  .wrap {
    padding: 24px 16px 48px;
  }
  header.site {
    padding: 16px 16px 0;
  }
  h1 {
    font-size: 1.75rem;
  }
  h2 {
    font-size: 1.15rem;
  }
  .subtitle {
    font-size: 1rem;
  }
  footer.site .row {
    flex-direction: column;
    align-items: flex-start;
  }
}