:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1d2430;
  --muted-text: #4f5d75;
  --border: #dde3ec;
  --primary: #1f4d8f;
  --primary-strong: #173b6c;
  --radius: 12px;
  --shadow: 0 6px 16px rgba(18, 31, 52, 0.08);
  --container: min(1080px, 92vw);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 6%, #e9f0ff 0, rgba(233, 240, 255, 0) 30%),
    radial-gradient(circle at 92% 18%, #e7f6ec 0, rgba(231, 246, 236, 0) 26%),
    var(--bg);
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.narrow {
  max-width: 760px;
}

.section {
  padding: 4.5rem 0;
}

.muted {
  background: #f0f3f8;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 248, 250, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 68px;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

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

.site-nav a {
  color: var(--muted-text);
  text-decoration: none;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--primary);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  padding: 0.4rem 0.75rem;
}

.hero {
  padding-top: 5.5rem;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.4fr minmax(220px, 330px);
  gap: 1.4rem;
  align-items: center;
}

.hero-copy {
  position: relative;
}

.hero-copy::after {
  content: "";
  position: absolute;
  width: 360px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, #6b8fc8, #89b6a0);
  left: 0;
  bottom: -12px;
}

.hero-visual {
  border: 3px solid transparent;
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 0.7rem;
  background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    linear-gradient(90deg, #6b8fc8, #89b6a0) border-box;
}

.hero-visual img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

.hero-visual p {
  margin: 0.65rem 0 0;
  color: var(--muted-text);
  font-size: 0.85rem;
}

.eyebrow {
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  color: var(--muted-text);
  margin-bottom: 0.75rem;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2rem);
  margin-bottom: 1.2rem;
}

.lead {
  max-width: 750px;
  font-size: 1.1rem;
  color: var(--muted-text);
}

.cta-group {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.button {
  display: inline-block;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
  font-weight: 600;
}

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

.button.primary:hover,
.button.primary:focus-visible {
  background: var(--primary-strong);
}

.button[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
}

.stack {
  display: grid;
  gap: 0.9rem;
}

.item-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1rem 0.9rem;
  box-shadow: var(--shadow);
}

.item-card h3 {
  margin-bottom: 0.2rem;
  font-size: 1.1rem;
}

.item-meta {
  color: var(--muted-text);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.project-tech {
  margin: 0.8rem 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.project-tech li {
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  color: var(--muted-text);
  background: #f8f9fc;
}

.achievement-list {
  margin: 0;
  padding-left: 1.2rem;
}

.achievement-list li + li {
  margin-top: 0.5rem;
}

.contact-links {
  margin-top: 1rem;
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted-text);
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: var(--surface);
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  z-index: 20;
}

@media (max-width: 760px) {
  .section {
    padding: 3.3rem 0;
  }

  .menu-toggle {
    display: inline-block;
  }

  .hero-layout {
    grid-template-columns: 1fr;
  }

  .site-nav {
    position: absolute;
    right: 4vw;
    top: 68px;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.8rem;
    box-shadow: var(--shadow);
    display: none;
  }

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