:root {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #111827;
  --surface-strong: #1f2937;
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.18);
  --border: rgba(148, 163, 184, 0.18);
  --shadow: 0 25px 60px rgba(15, 23, 42, 0.4);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.12), transparent 28%),
              radial-gradient(circle at 80% 20%, rgba(76, 217, 100, 0.12), transparent 22%),
              var(--bg);
  color: var(--text);
}

img {
  max-width: 100%;
  display: block;
}

button, .button {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  padding: 4rem 0 3rem;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--accent);
}

.header-inner {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-weight: 700;
  font-size: 0.85rem;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  line-height: 1.02;
}

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

.subtitle {
  margin: 1.5rem 0 0;
  max-width: 42rem;
  color: var(--muted);
  line-height: 1.75;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 1.7rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: #0f172a;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 40px rgba(56, 189, 248, 0.24);
}

.section {
  padding: 5rem 0;
}

.section-alt {
  background: rgba(15, 23, 42, 0.88);
}

.section h2 {
  margin: 0 0 1.5rem;
  font-size: 2.25rem;
}

.section p,
.section li,
.section blockquote {
  color: var(--muted);
  line-height: 1.8;
}

.section ul,
.section ol {
  margin: 1rem 0 0 1.25rem;
}

.section li {
  margin-bottom: 0.75rem;
}

.cards {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card,
.portfolio-card,
.contact-card,
.cta-card {
  padding: 1.75rem;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.95);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
}

.card h3,
.portfolio-card h3,
.contact-card h3,
.cta-card h3 {
  margin: 0 0 0.8rem;
}

.portfolio-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 2rem;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.skills-list span {
  display: inline-flex;
  padding: 0.85rem 1rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.14);
  color: var(--text);
  border: 1px solid rgba(56, 189, 248, 0.18);
}

.contact-cards {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.cta-card {
  margin-top: 2rem;
}

.site-footer {
  text-align: center;
  padding: 2rem 0 3rem;
  color: var(--muted);
}

@media (max-width: 800px) {
  .header-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .button {
    width: fit-content;
    margin: 0 auto;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding-top: 3.5rem;
  }

  .section {
    padding: 3rem 0;
  }

  h1 {
    font-size: 2.8rem;
  }
}