:root {
  --bg: #f5f7fb;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: rgba(255, 255, 255, 0.95);
  --text: #111827;
  --muted: #5b6473;
  --line: rgba(17, 24, 39, 0.08);
  --primary: #2563eb;
  --primary-soft: rgba(37, 99, 235, 0.12);
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --maxw: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 28%),
    radial-gradient(circle at right 20%, rgba(99, 102, 241, 0.08), transparent 22%),
    var(--bg);
  line-height: 1.58;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.42s ease, transform 0.42s ease;
}

body.page-ready {
  opacity: 1;
  transform: translateY(0);
}

body.page-exit {
  opacity: 0;
  transform: translateY(8px);
}

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

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

.container {
  width: min(var(--maxw), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(245, 247, 251, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 0.84rem;
  color: var(--muted);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.header-nav a {
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 0.22s ease;
}

.header-nav a:hover {
  color: var(--text);
}

.lang-switch {
  display: inline-flex;
  gap: 6px;
  padding: 5px;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.lang-switch a {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--muted);
  transition: all 0.22s ease;
}

.lang-switch a.active {
  background: var(--text);
  color: #fff;
}

main {
  overflow: hidden;
}

.hero {
  padding: 72px 0 26px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 28px;
  align-items: stretch;
}

.hero-card,
.panel,
.project-card,
.archive-card,
.contact-card,
.timeline-card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 34px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 999px;
  padding: 9px 14px;
  font-size: 0.88rem;
  font-weight: 600;
}

.hero h1 {
  margin: 18px 0 12px;
  font-size: clamp(2.3rem, 5vw, 4.6rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
}

.hero h1 span {
  display: block;
}

.hero-lead {
  max-width: 720px;
  margin: 0 0 22px;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--text);
  color: #fff;
  box-shadow: 0 12px 28px rgba(17, 24, 39, 0.18);
}

.btn-secondary {
  background: var(--surface-strong);
  border-color: var(--line);
  color: var(--text);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.metric {
  padding: 16px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--line);
}

.metric strong {
  display: block;
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.metric span {
  font-size: 0.92rem;
  color: var(--muted);
}

.hero-visual {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  min-height: 100%;
}

.visual-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  min-height: 220px;
  background: #dfe6f2;
  box-shadow: var(--shadow);
}

.visual-card.large {
  grid-column: span 2;
  min-height: 260px;
}

.visual-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.visual-label {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #fff;
  background: rgba(17, 24, 39, 0.72);
  backdrop-filter: blur(10px);
}

.section {
  padding: 28px 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.section-title {
  margin: 0;
  font-size: clamp(1.55rem, 2.3vw, 2.35rem);
  letter-spacing: -0.04em;
}

.section-copy {
  max-width: 720px;
  margin: 8px 0 0;
  color: var(--muted);
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.trust-item {
  padding: 16px;
  text-align: center;
  font-weight: 600;
  color: var(--muted);
  border-radius: var(--radius-lg);
  background: var(--surface-strong);
  border: 1px solid var(--line);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.project-card {
  overflow: hidden;
}

.project-image {
  height: 270px;
  background: #dfe6f2;
}

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

.project-body {
  padding: 24px;
}

.project-kicker {
  display: inline-flex;
  font-size: 0.82rem;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 10px;
}

.project-title {
  margin: 0 0 10px;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.project-text {
  margin: 0 0 16px;
  color: var(--muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.05);
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 600;
}

.two-col {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 18px;
}

.panel {
  padding: 28px;
}

.panel h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.panel p {
  margin: 0;
  color: var(--muted);
}

.skill-groups {
  display: grid;
  gap: 14px;
}

.skill-group {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.64);
}

.skill-group h4 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.skill-group p {
  margin: 0;
  color: var(--muted);
}

.timeline-wrap {
  display: grid;
  gap: 14px;
}

.timeline-card {
  padding: 20px 22px;
}

.timeline-top {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 10px;
}

.timeline-role {
  font-weight: 700;
}

.timeline-company,
.timeline-date,
.timeline-desc {
  color: var(--muted);
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.archive-card {
  padding: 18px;
}

.archive-card h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
}

.archive-card p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
}

.contact-card {
  padding: 28px;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 16px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid var(--line);
}

.contact-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-value {
  font-size: 1rem;
}

.footer {
  padding: 34px 0 48px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 1080px) {
  .hero-grid,
  .two-col,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .trust-strip,
  .archive-grid,
  .projects-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .header-inner {
    align-items: flex-start;
    padding: 14px 0;
    flex-direction: column;
  }

  .hero {
    padding-top: 34px;
  }

  .hero-card {
    padding: 24px;
  }

  .hero-metrics,
  .trust-strip,
  .projects-grid,
  .archive-grid,
  .hero-visual {
    grid-template-columns: 1fr;
  }

  .visual-card.large {
    grid-column: span 1;
  }

  .project-image {
    height: 220px;
  }

  .section {
    padding: 22px 0;
  }
}