:root {
  --blue-dark: #0f3d91;
  --blue-main: #1f5fbf;
  --blue-soft: #eaf2ff;
  --blue-border: #c9dafc;
  --text-main: #1e293b;
  --text-soft: #475569;
  --white: #ffffff;
  --shadow: 0 10px 25px rgba(15, 61, 145, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: var(--text-main);
  background-color: #f7faff;
}

.image-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.9);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 2rem;
}

.image-modal-content {
  max-width: 90%;
  max-height: 80vh;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
}

.image-modal-caption {
  margin-top: 1rem;
  color: #fff;
  text-align: center;
  max-width: 900px;
}

.image-modal-close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: #fff;
  font-size: 2.5rem;
  font-weight: bold;
  cursor: pointer;
  line-height: 1;
}

.gallery-item img {
  transition: transform 0.2s ease;
}

.gallery-item img:hover {
  transform: scale(1.02);
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.hero {
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-main));
  color: var(--white);
  padding: 72px 0 56px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.95rem;
  opacity: 0.9;
  letter-spacing: 0.4px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.15;
}

.subtitle {
  max-width: 720px;
  margin: 0 0 26px;
  font-size: 1.08rem;
  opacity: 0.96;
}

.button {
  display: inline-block;
  background-color: var(--white);
  color: var(--blue-dark);
  text-decoration: none;
  font-weight: bold;
  padding: 12px 20px;
  border-radius: 10px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
  opacity: 0.95;
}

main {
  padding: 36px 0 24px;
}

.card {
  background-color: var(--white);
  border: 1px solid var(--blue-border);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.card h2 {
  margin-top: 0;
  margin-bottom: 16px;
  color: var(--blue-dark);
  font-size: 1.6rem;
}

.card h3 {
  margin-top: 0;
  color: var(--blue-main);
  font-size: 1.08rem;
}

.section-text {
  margin-top: 0;
  color: var(--text-soft);
}

.gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 18px;
}

.gallery-item {
  margin: 0;
  background-color: var(--blue-soft);
  border: 1px solid var(--blue-border);
  border-radius: 14px;
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  height: auto;
  display: block;
  background-color: #ffffff;
}

.gallery-item figcaption {
  padding: 14px 16px;
  font-size: 1rem;
  color: var(--text-soft);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.tech-grid > div {
  background-color: var(--blue-soft);
  border: 1px solid var(--blue-border);
  border-radius: 14px;
  padding: 16px;
}

.tech-grid ul {
  margin: 0;
  padding-left: 18px;
}

.repo-link {
  color: var(--blue-main);
  font-weight: bold;
  text-decoration: none;
}

.repo-link:hover {
  text-decoration: underline;
}

.note {
  color: var(--text-soft);
  font-size: 0.95rem;
}

.footer {
  padding: 18px 0 32px;
  color: var(--text-soft);
  text-align: center;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.hero-text {
  flex: 1;
}

.hero-photo {
  flex-shrink: 0;
}

.hero-photo img {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  display: block;
}

.section-nav {
  background-color: #ffffff;
  border-bottom: 1px solid var(--blue-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(15, 61, 145, 0.05);
}

.section-nav ul {
  list-style: none;
  margin: 0;
  padding: 14px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: center;
}

.section-nav a {
  text-decoration: none;
  color: var(--blue-dark);
  font-weight: bold;
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: 8px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.section-nav a:hover {
  background-color: var(--blue-soft);
  color: var(--blue-main);
}

@media (max-width: 768px) {
  .gallery {
    gap: 18px;
    margin-top: 14px;
  }

  .gallery-item {
    border-radius: 10px;
  }

  .gallery-item figcaption {
    padding: 12px 14px;
    font-size: 0.95rem;
  }

    .hero-content {
    flex-direction: column-reverse;
    text-align: center;
  }

  .hero-photo img {
    width: 140px;
    height: 140px;
  }

  .subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .section-nav ul {
    gap: 10px;
    padding: 10px 0;
  }

  .section-nav a {
    font-size: 0.9rem;
    padding: 6px 10px;
  }
}