:root {
  color-scheme: light;
  --bg: #f5f7f4;
  --surface: #ffffff;
  --surface-soft: #eaf1ee;
  --ink: #17211f;
  --muted: #62706c;
  --line: #d8e0dc;
  --accent: #0f7b6c;
  --accent-dark: #09594e;
  --gold: #c3933e;
  --shadow: 0 24px 70px rgba(27, 44, 39, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 123, 108, 0.14), transparent 34rem),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 38%, #eef3f0 100%);
  font-family: Inter, "Segoe UI", "Noto Sans JP", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
  padding: 0 5vw;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 4px 16px rgba(23, 33, 31, 0.06);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: #ffffff;
  background: var(--accent-dark);
  border-radius: 8px;
  font-size: 0.85rem;
  letter-spacing: 0;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.5rem;
  font-weight: 600;
}

.top-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 8px 12px;
}

.top-nav a:hover,
.top-nav a:focus-visible {
  color: var(--accent-dark);
}

.top-nav a[aria-current="location"] {
  color: var(--accent-dark);
}

.top-nav a[aria-current="location"]::after {
  content: "";
  position: absolute;
  height: 3px;
  left: 12px;
  right: 12px;
  bottom: 0;
  background: var(--accent);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 24px;
  min-width: 0;
}

.language-switch {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  font-size: 0.875rem;
  line-height: 1.25rem;
}

.language-switch img {
  flex: 0 0 18px;
}

.language-switch a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  min-height: 44px;
  color: var(--muted);
}

.language-switch a[aria-current="page"] {
  color: var(--accent-dark);
  font-weight: 700;
}

.language-divider {
  color: var(--line);
}

.top-nav a:focus-visible,
.language-switch a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.top-nav a:hover,
.language-switch a:hover {
  background: var(--surface-soft);
}

section[id] {
  scroll-margin-top: 152px;
}

main {
  width: min(1120px, 90vw);
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 5rem 0 4rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 1.4rem;
  font-size: clamp(3.3rem, 8vw, 6.8rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h1 span {
  display: block;
  color: var(--accent-dark);
  font-size: clamp(2rem, 5vw, 4.2rem);
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

.lead {
  max-width: 720px;
  margin-bottom: 2rem;
  color: #3d4b47;
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0.72rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

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

.button.secondary {
  color: var(--accent-dark);
  background: rgba(255, 255, 255, 0.72);
}

.profile-panel {
  display: grid;
  gap: 1.3rem;
  padding: clamp(1.2rem, 3vw, 1.8rem);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.portrait {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--surface-soft);
  border-radius: 8px;
}

.portrait img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.quick-facts {
  display: grid;
  gap: 0.9rem;
  margin: 0;
}

.quick-facts div {
  display: grid;
  gap: 0.15rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--line);
}

.quick-facts div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.quick-facts dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.quick-facts dd {
  margin: 0;
  font-weight: 800;
}

.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  border-top: 1px solid var(--line);
}

.intro-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 5vw, 4rem);
}

.intro-text {
  color: #3f4f4a;
  font-size: 1.04rem;
}

.intro-text p:last-child {
  margin-bottom: 0;
}

.section-heading {
  max-width: 620px;
  margin-bottom: 2rem;
}

.section-summary {
  margin: 0.9rem 0 0;
  color: var(--muted);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.project-timeline {
  position: relative;
  display: grid;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.project-timeline::before {
  position: absolute;
  top: 1rem;
  bottom: 1rem;
  left: 7.1rem;
  width: 1px;
  content: "";
  background: var(--line);
}

.project-entry {
  position: relative;
  display: grid;
  grid-template-columns: 8rem minmax(0, 1fr);
  gap: 1.55rem;
  align-items: stretch;
}

.project-date {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  padding-top: 1.3rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1.2;
}

.project-date::after {
  position: absolute;
  top: 1.48rem;
  right: 0.55rem;
  width: 12px;
  height: 12px;
  content: "";
  background: #ffffff;
  border: 3px solid var(--accent);
  border-radius: 50%;
}

.project-entry-current .project-date::after {
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(15, 123, 108, 0.13);
}

.project-date span {
  color: #a7b3af;
}

.personal-projects {
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
}

.project-card {
  display: flex;
  flex-direction: column;
  min-height: 290px;
  padding: clamp(1.35rem, 3vw, 1.8rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.project-card-featured {
  grid-column: 1 / -1;
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent-dark), #0f7b6c);
  border-color: transparent;
}

.project-label,
.project-stack,
.project-note {
  margin-bottom: 0.6rem;
}

.project-label {
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.project-card-featured .project-label {
  color: #bde2db;
}

.project-card h3 {
  margin-bottom: 0.5rem;
  font-size: clamp(1.25rem, 2vw, 1.6rem);
}

.project-stack {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.project-card-featured .project-stack {
  color: #d8f0eb;
}

.project-card p:not(.project-label):not(.project-stack):not(.project-note) {
  margin-bottom: 0.9rem;
}

.project-card ul {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding-left: 1.2rem;
}

.project-card li::marker {
  color: var(--gold);
}

.project-note {
  margin-top: auto;
  padding-top: 1rem;
  color: #d8f0eb;
  font-size: 0.84rem;
}

.text-link {
  margin-top: auto;
  color: var(--accent-dark);
  font-weight: 900;
}

.text-link:hover,
.text-link:focus-visible {
  text-decoration: underline;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: auto;
}

.project-actions .text-link {
  margin-top: 0;
}

.inline-link {
  color: var(--accent-dark);
  font-weight: 800;
  text-decoration: underline;
}

.project-card-featured .project-link-light,
.project-card-featured .project-link-light:hover,
.project-card-featured .project-link-light:focus-visible {
  color: #ffffff;
}

.back-link {
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 800;
}

.project-detail {
  width: min(920px, 90vw);
  margin: 0 auto;
}

.detail-hero {
  padding: clamp(4rem, 9vw, 7rem) 0 3rem;
}

.detail-hero h1 {
  max-width: none;
  font-size: clamp(2.7rem, 6vw, 5.1rem);
}

.detail-hero h1 span {
  font-size: clamp(1.8rem, 4.2vw, 3.6rem);
  line-height: 1.12;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.tag-list span {
  padding: 0.35rem 0.68rem;
  color: var(--accent-dark);
  background: var(--surface-soft);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 800;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding: 2rem 0;
  border-top: 1px solid var(--line);
}

.detail-grid article {
  padding: 1.45rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.detail-grid article:first-child {
  grid-column: 1 / -1;
}

.detail-grid h2 {
  margin-bottom: 1rem;
  color: var(--accent-dark);
  font-size: 1.18rem;
}

.detail-grid p,
.detail-grid ul {
  margin-bottom: 0;
  color: #3f4f4a;
}

.detail-action {
  margin-top: 1.6rem;
}

.detail-grid ul {
  display: grid;
  gap: 0.55rem;
  padding-left: 1.2rem;
}

.detail-grid li::marker {
  color: var(--gold);
}

.confidentiality-note {
  margin: 0 0 4rem;
  padding: 1rem 1.15rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.68);
  border-left: 3px solid var(--gold);
  font-size: 0.86rem;
}

.skill-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.skill-card {
  min-height: 230px;
  padding: 1.35rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.skill-card h3 {
  color: var(--accent-dark);
}

.skill-card ul {
  display: grid;
  gap: 0.55rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.skill-card li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: #3f4f4a;
}

.skill-card li::before {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  flex: 0 0 auto;
  background: var(--gold);
  border-radius: 50%;
}

.timeline-section {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: clamp(2rem, 6vw, 5rem);
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 1rem;
  padding: 1.4rem;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.timeline-dot {
  width: 14px;
  height: 14px;
  margin-top: 0.35rem;
  background: var(--accent);
  border: 3px solid #dcefe9;
  border-radius: 50%;
}

.timeline-label {
  margin-bottom: 0.25rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.timeline-item p:last-child {
  margin-bottom: 0;
  color: #4b5b56;
}

.cert-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.cert-list article {
  display: grid;
  gap: 0.28rem;
  padding: 1.15rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
}

.cert-list span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.cert-list h3 {
  margin: 0;
}

.cert-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.contact-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: start;
  gap: 32px;
  margin: 1rem 0 4rem;
  padding: 48px 0;
  color: var(--ink);
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.contact-band .eyebrow {
  color: var(--accent-dark);
}

.contact-band h2 {
  margin: 0;
  font-size: 1.875rem;
  line-height: 2.25rem;
  font-weight: 600;
  text-wrap: balance;
}

.contact-heading > p:last-child {
  margin: 12px 0 0;
  color: var(--muted);
}

.contact-details {
  min-width: 0;
}

.contact-list {
  margin: 0;
}

.contact-list > div {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.contact-list dt {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.5rem;
}

.contact-list dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.5rem;
  overflow-wrap: anywhere;
  user-select: text;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  color: var(--accent-dark);
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 600;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  text-decoration: none;
}

.social-links a:hover {
  color: var(--ink);
}

.social-links a:focus-visible,
.hero-actions a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.social-links a:active {
  transform: translateY(1px);
}

@media (max-width: 920px) {
  .site-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0 16px;
    padding: 8px 5vw;
  }

  .header-controls {
    display: contents;
  }

  .language-switch {
    grid-column: 2;
    grid-row: 1;
  }

  .site-header > .brand {
    grid-column: 1;
    grid-row: 1;
  }

  .top-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    min-width: 0;
    overflow-x: auto;
    white-space: nowrap;
  }

  .hero,
  .intro-section,
  .timeline-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 4rem;
  }

  .profile-panel {
    max-width: 520px;
  }

  .skill-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .detail-grid {
    grid-template-columns: 1fr;
  }

  .project-timeline::before {
    left: 6.1rem;
  }

  .project-entry {
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: 1.25rem;
  }

  .project-date::after {
    right: 0.55rem;
  }
}

@media (max-width: 680px) {
  .top-nav {
    width: 100%;
    flex-wrap: wrap;
    gap: 0 4px;
  }

  .top-nav a {
    padding: 8px;
    font-size: 0.875rem;
  }

  main {
    width: min(100% - 1.8rem, 1120px);
  }

  .hero {
    padding: 3rem 0 3.2rem;
  }

  .skill-grid,
  .cert-list,
  .project-grid {
    grid-template-columns: 1fr;
  }

  .project-timeline::before {
    left: 0.3rem;
  }

  .project-entry {
    grid-template-columns: 1fr;
    gap: 0.55rem;
    padding-left: 1.45rem;
  }

  .project-date {
    align-items: flex-start;
    flex-direction: row;
    padding-top: 0;
  }

  .project-date::after {
    top: 0.16rem;
    right: auto;
    left: -1.48rem;
  }

  .contact-band {
    grid-template-columns: minmax(0, 1fr);
    padding: 32px 0;
  }

  .project-detail {
    width: min(100% - 1.8rem, 920px);
  }

}

.career-summary {
  font-size: 0.95rem;
  line-height: 1.7;
  overflow-wrap: anywhere;
}


.english-projects article + article {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid #d6dce0;
}

@media print {
  .site-header,
  .hero-actions,
  .contact-band {
    display: none;
  }

  body {
    background: #ffffff;
  }

  main {
    width: 100%;
  }

  .hero,
  .section {
    min-height: auto;
    padding: 1rem 0;
  }

  .profile-panel,
  .skill-card,
  .timeline-item,
  .cert-list article {
    box-shadow: none;
  }
}