:root {
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --ink: #0f172a;
  --muted: #64748b;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.site-brand:hover {
  text-decoration: none;
}

.site-brand__mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #14b8a6);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
}

.site-brand__logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
}

.site-nav a {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--primary);
  text-decoration: none;
}

.site-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

.btn--primary {
  background: var(--primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--primary-dark);
  color: #fff;
}

.btn--ghost {
  background: #fff;
  border-color: var(--border);
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 2rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin: 0 0 1rem;
}

.hero p.lead {
  font-size: 1.1rem;
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.hero__card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.features {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}

.features h2,
.download h2,
.page-content h1 {
  margin-top: 0;
}

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

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.feature-card__icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #ccfbf1;
  color: var(--primary-dark);
  display: grid;
  place-items: center;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.download {
  max-width: 1120px;
  margin: 0 auto 2rem;
  padding: 0 1.25rem 2rem;
}

.download__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.download-card {
  background: linear-gradient(135deg, #0f766e, #0d9488);
  color: #fff;
  border-radius: var(--radius);
  padding: 1.5rem;
}

.download-card h3 {
  margin-top: 0;
}

.download-card .btn {
  margin-top: 0.75rem;
}

.page-wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3rem;
}

.page-content {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.contact-form {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.5rem;
}

.contact-form label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.92rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
}

.alert-success {
  background: #ecfdf5;
  border: 1px solid #6ee7b7;
  color: #065f46;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  margin-top: 2rem;
}

.site-footer__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  display: grid;
  gap: 1rem;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.site-footer__links a {
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer__meta {
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .site-header__inner {
    flex-wrap: wrap;
  }
}