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

:root {
  --bg: #070b14;
  --card: #101827;
  --text: #f8fafc;
  --muted: #94a3b8;
  --blue: #3b82f6;
  --border: #1e293b;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.header {
  width: 100%;
  padding: 24px 8%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(7, 11, 20, 0.92);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo {
  font-size: 22px;
  font-weight: 700;
}

.logo::after {
  content: "";
  color: var(--blue);
}

.nav {
  display: flex;
  gap: 26px;
  font-size: 15px;
}

.nav a {
  color: var(--muted);
  transition: color 0.2s;
}

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

main {
  width: 84%;
  max-width: 1100px;
  margin: 0 auto;
}

.hero {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.tag,
.section-number {
  color: var(--blue);
  font-size: 15px;
  margin-bottom: 16px;
  font-weight: 600;
}

.hero h1 {
  font-size: clamp(44px, 8vw, 82px);
  line-height: 1.1;
  margin-bottom: 12px;
}

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

.hero h2 {
  color: var(--muted);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 500;
  margin-bottom: 22px;
}

.hero-text {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
  margin-bottom: 32px;
}

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

.btn {
  padding: 13px 22px;
  border-radius: 12px;
  font-weight: 700;
  border: 1px solid var(--border);
}

.btn.primary {
  background: var(--blue);
  color: white;
  border-color: var(--blue);
}

.btn.secondary {
  color: var(--text);
}

.section {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}

.section h2 {
  font-size: clamp(30px, 5vw, 48px);
  margin-bottom: 22px;
}

.section p {
  color: var(--muted);
  max-width: 820px;
  font-size: 17px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 28px;
}

.card,
.info-box {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 26px;
  border-radius: 18px;
}

.card h3,
.info-box h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

.card p,
.info-box p,
.info-box li {
  color: var(--muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tags span,
.skills span {
  background: rgba(59, 130, 246, 0.12);
  color: #bfdbfe;
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 14px;
}

.info-box {
  margin-bottom: 18px;
}

.info-box ul {
  padding-left: 20px;
}

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.contact-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.contact-links a {
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--blue);
  font-weight: 700;
}

.footer {
  text-align: center;
  padding: 30px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    gap: 18px;
    padding: 20px 6%;
  }

  .nav {
    gap: 14px;
    flex-wrap: wrap;
    justify-content: center;
  }

  main {
    width: 90%;
  }

  .hero {
    min-height: 75vh;
  }

  .cards {
    grid-template-columns: 1fr;
  }
}