:root {
  --bg: #0b1020;
  --bg-alt: #10182c;
  --surface: #161f38;
  --border: #263252;
  --text: #e8ecf7;
  --text-dim: #a4aec8;
  --accent: #4fd1c5;
  --accent-dim: #2c9c92;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

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

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header / Nav */
header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 16, 32, 0.9);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-dim);
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1.1rem;
  padding: 6px 10px;
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 96px 24px 72px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  margin: 0 0 16px;
  letter-spacing: -0.03em;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 640px;
  margin: 0 auto 32px;
}

.hero .accent {
  color: var(--accent);
}

.cta-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  transition:
    transform 0.15s ease,
    background 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #052321;
}

.btn-primary:hover {
  background: #67dfd4;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Sections */
section {
  padding: 64px 24px;
}

.section-alt {
  background: var(--bg-alt);
}

h2 {
  font-size: 2rem;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  text-align: center;
}

.section-lede {
  color: var(--text-dim);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 40px;
}

/* Cards / grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.card p {
  color: var(--text-dim);
  margin: 0;
}

.card .icon {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

/* Portfolio */
.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.product-thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--bg-alt), var(--surface));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.product-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.product-body h3 {
  margin: 0;
  font-size: 1.3rem;
}

.product-body p {
  color: var(--text-dim);
  margin: 0;
  flex: 1;
}

.product-link {
  font-weight: 600;
}

/* About */
.about-body {
  max-width: 720px;
  margin: 0 auto;
}

.about-body p {
  color: var(--text-dim);
}

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.skill-tag {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* Contact */
.contact-wrap {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.form-frame-wrap {
  margin-top: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  overflow-x: auto;
}

.form-frame-wrap iframe {
  border: none;
  width: 100%;
  max-width: 640px;
  height: 950px;
  margin: 0 auto;
  display: block;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Responsive nav */
@media (max-width: 640px) {
  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 14px 24px;
    border-top: 1px solid var(--border);
  }

  .hero {
    padding: 64px 20px 48px;
  }

  .form-frame-wrap iframe {
    height: 700px;
  }
}