:root {
  --bg: #ffffff;
  --ink: #111111;
  --muted: #555555;
  --line: #e6e6e6;
  --accent: #1b4332;
  --header-h: 68px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
}

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

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1040px;
  margin: 0 auto;
  padding: 16px 24px;
  min-height: var(--header-h);
}

.site-name {
  color: var(--ink);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
}

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

.site-nav a {
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
}

.nav-toggle-bar {
  position: absolute;
  top: 50%;
  left: 50%;
  margin: -0.75px 0 0 -9px;
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-bar::before {
  top: -6px;
}

.nav-toggle-bar::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after {
  top: 0;
  transform: rotate(-45deg);
}

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px 96px;
}

.hero {
  padding: 80px 0 64px;
}

.label {
  margin: 0 0 20px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.16em;
}

.hero h1 {
  margin: 0 0 28px;
  font-size: clamp(2.6rem, 8vw, 4.4rem);
  font-weight: 500;
  line-height: 1.3;
}

.lead {
  margin: 0;
  max-width: 36em;
  color: var(--muted);
}

.section {
  padding: 72px 0 0;
}

.section h2 {
  margin: 0 0 24px;
  font-size: 1.4rem;
}

.note {
  margin: 0 0 32px;
  color: var(--muted);
}

.skills {
  display: grid;
  gap: 32px;
}

.skill {
  padding-top: 16px;
  border-top: 2px solid var(--accent);
}

.skill h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}

.skill ul,
.works {
  margin: 0;
  padding: 0;
  list-style: none;
}

.skill li {
  color: var(--muted);
}

.works {
  display: grid;
  gap: 40px;
}

.work-visual {
  display: block;
  margin-bottom: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #f4f4f4;
}

.work-visual img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top center;
}

.work-type {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
}

.work h3 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

.work p {
  margin: 0 0 12px;
  color: var(--muted);
}

.work > a {
  word-break: break-all;
}

.contact > p {
  max-width: 36em;
  color: var(--muted);
}

.contact-line {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 2px solid var(--accent);
  color: var(--ink);
}

.site-footer {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

.site-footer p {
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (min-width: 800px) {
  .skills,
  .works {
    grid-template-columns: repeat(3, 1fr);
  }

  .work-visual img {
    height: 180px;
  }
}

@media (max-width: 719px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
  }

  .site-nav ul {
    display: block;
    padding: 8px 24px 16px;
  }

  .site-nav li {
    border-top: 1px solid var(--line);
  }

  .site-nav a {
    display: block;
    padding: 14px 0;
  }

  body.nav-open .site-nav {
    display: block;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .hero h1 br {
    display: none;
  }

  .section {
    padding-top: 56px;
  }
}