:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --border: #e6e4de;
  --accent: #2f6f5e;
  --accent-hover: #245446;
  --radius: 12px;
  --max-width: 960px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-hover);
}

/* Header & Navigation */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}

.nav-menu {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.nav-menu a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 0.25rem 0;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text);
}

.nav-menu a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* Layout */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section {
  margin-bottom: 4rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  position: relative;
  padding-left: 1rem;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 4px;
  background: var(--accent);
  border-radius: 2px;
}

/* Hero (Top) */
.hero {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 5rem;
}

.hero-image {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  background: var(--border);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-greeting {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.hero-name {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.hero-role {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.hero-bio {
  color: var(--text);
  line-height: 1.8;
}

/* Profile details */
.profile-list {
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

.profile-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.profile-list .label {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
}

/* Works grid */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.75rem;
}

.work-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.06);
}

.work-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.work-card-body {
  padding: 1.25rem;
}

.work-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent);
  background: rgba(47, 111, 94, 0.08);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.work-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.work-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Hobbies */
.hobby-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  list-style: none;
}

.hobby-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.hobby-list h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hobby-list p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Contact */
.contact-intro {
  max-width: 600px;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.contact-list {
  list-style: none;
  display: grid;
  gap: 1rem;
  max-width: 520px;
}

.contact-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.contact-list .label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-list .value {
  color: var(--text);
  font-weight: 500;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 720px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
  }

  .hero-image {
    max-width: 200px;
    margin: 0 auto;
  }

  .hero-name {
    font-size: 2rem;
  }

  .nav {
    padding: 1rem;
  }

  .nav-menu {
    gap: 1rem;
  }

  main {
    padding: 2.5rem 1.25rem;
  }

  .profile-list li {
    grid-template-columns: 100px 1fr;
  }
}