:root {
  color-scheme: light;
  --bg: #0c1222;
  --card: #141c34;
  --accent: #4f9cff;
  --accent-2: #00d4a7;
  --text: #e9f0ff;
  --muted: #b8c2de;
  --danger: #ff6b6b;
  --shadow: rgba(5, 12, 28, 0.35);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

body {
  background: radial-gradient(circle at top, #1e2b52, var(--bg));
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  padding: 28px 8vw 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.brand h1 {
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  letter-spacing: 0.5px;
}

.brand span {
  font-size: 0.95rem;
  color: var(--muted);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 18px;
  font-weight: 600;
}

nav a {
  padding: 8px 12px;
  border-radius: 999px;
  transition: all 0.2s ease;
}

nav a:hover {
  background: rgba(79, 156, 255, 0.2);
}

.hero {
  padding: 40px 8vw 70px;
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
}

.hero-card {
  background: linear-gradient(135deg, rgba(79, 156, 255, 0.2), rgba(0, 212, 167, 0.2));
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 24px 50px var(--shadow);
}

.hero-card h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}

.hero-card p {
  color: var(--muted);
  margin-bottom: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.button {
  background: var(--accent);
  color: #06112a;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 12px 24px rgba(79, 156, 255, 0.35);
  border: none;
  cursor: pointer;
}

.button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: none;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.badge {
  padding: 8px 14px;
  background: rgba(20, 28, 52, 0.7);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--muted);
}

.section {
  padding: 60px 8vw;
}

.section h3 {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.section p.lead {
  color: var(--muted);
  max-width: 760px;
  margin-bottom: 32px;
}

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

.card {
  background: var(--card);
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 16px 30px var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.card h4 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
}

.highlight {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.contact-grid:has(.contact-card:only-child) {
  justify-items: stretch;
}

.contact-card {
  background: var(--card);
  border-radius: 18px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 35px var(--shadow);
}

form {
  display: grid;
  gap: 16px;
}

label {
  font-weight: 600;
  font-size: 0.9rem;
}

input,
textarea,
select {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(9, 14, 28, 0.8);
  color: var(--text);
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid rgba(79, 156, 255, 0.6);
}

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

.form-row {
  display: grid;
  gap: 12px;
}

.helper {
  font-size: 0.85rem;
  color: var(--muted);
}

.error {
  color: var(--danger);
  font-size: 0.85rem;
}

.notice {
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 0.95rem;
}

.notice.success {
  background: rgba(0, 212, 167, 0.18);
  border: 1px solid rgba(0, 212, 167, 0.35);
}

.notice.error {
  background: rgba(255, 107, 107, 0.18);
  border: 1px solid rgba(255, 107, 107, 0.35);
}

footer {
  padding: 30px 8vw 40px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #06112a;
  font-weight: 800;
  box-shadow: 0 12px 24px rgba(79, 156, 255, 0.35);
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.2s ease;
  pointer-events: none;
}

.to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }

  nav ul {
    flex-wrap: wrap;
  }
}