/* ===== base.css — 共有レイアウト（3案共通の骨格） ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: var(--accent-ink); }

:root {
  --maxw: 1120px;
  --pad: clamp(20px, 5vw, 64px);
  --gap: clamp(56px, 9vw, 132px);
}

@media (min-width: 1200px) {
  :root {
    --maxw: min(1440px, 100%);
    --pad: clamp(40px, 4vw, 80px);
    --gap: clamp(72px, 6.5vw, 148px);
  }
}

/* ---------- shared atoms ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent-strong, var(--accent));
  margin-bottom: 22px;
}
.eyebrow .eb-n { font-variant-numeric: tabular-nums; opacity: .55; }
.eyebrow::before {
  content: ""; width: 26px; height: 1px; background: currentColor; opacity: .6;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 15px 30px; font-size: 15px; font-weight: 600;
  border-radius: var(--btn-radius, 2px); letter-spacing: .04em;
  transition: transform .25s ease, background .25s ease, color .25s ease, border-color .25s ease;
  cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { transform: translateY(-2px); background: var(--accent-strong, var(--accent)); color: var(--accent-ink); }
.btn-ghost { border-color: var(--line-strong, var(--line)); color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }

.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .02em;
  padding: 7px 14px; border: 1px solid var(--line); border-radius: 999px;
  color: var(--ink-soft); background: var(--chip-bg, transparent);
  transition: border-color .2s, color .2s;
}
.chip:hover { border-color: var(--ink); color: var(--ink); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 24px;
  padding: 16px var(--pad);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(14px) saturate(1.1);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; flex-direction: column; line-height: 1.2; margin-right: auto; }
.brand-mark { font-family: var(--font-display, var(--font-sans)); font-weight: 800; letter-spacing: .14em; font-size: 19px; }
.brand-sub { font-size: 11px; letter-spacing: .12em; color: var(--ink-faint); }
.site-nav { display: flex; gap: 30px; }
.site-nav a { font-size: 14px; color: var(--ink-soft); position: relative; padding: 4px 0; }
.site-nav a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 1px; background: var(--ink); transition: width .25s; }
.site-nav a:hover { color: var(--ink); }
.site-nav a:hover::after { width: 100%; }
.header-cta {
  font-size: 13px; font-weight: 600; padding: 10px 20px;
  border: 1px solid var(--ink); border-radius: var(--btn-radius, 2px);
  transition: background .2s, color .2s;
}
.header-cta:hover { background: var(--ink); color: var(--bg); }
.nav-check {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); display: block; }
.case-img--ph {
  display: flex; align-items: center; justify-content: center;
  background: var(--surface, #f4f6f9);
  color: var(--ink-faint, #69707d);
  text-align: center; padding: 16px;
}
.case-img-ph-text { font-size: 12.5px; line-height: 1.55; letter-spacing: .02em; }

/* ---------- layout ---------- */
main { display: block; }
.section { max-width: var(--maxw); margin: 0 auto; padding: var(--gap) var(--pad); }
.section-head { max-width: 760px; margin-bottom: clamp(40px, 6vw, 72px); }
.section-title {
  font-family: var(--font-display, var(--font-sans));
  font-weight: var(--title-weight, 700);
  font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.22; letter-spacing: .01em; margin: 0 0 22px;
  text-wrap: balance;
}
.section-intro { font-size: clamp(16px, 1.4vw, 18px); color: var(--ink-soft); margin: 0; text-wrap: pretty; }

/* ---------- hero ---------- */
.hero { max-width: var(--maxw); margin: 0 auto; padding: clamp(56px, 9vw, 116px) var(--pad) clamp(40px, 7vw, 92px); }
.hero-inner {
  display: grid; grid-template-columns: 1.35fr 0.9fr; gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

@media (min-width: 1200px) {
  .hero { padding-top: clamp(72px, 7vw, 128px); padding-bottom: clamp(56px, 5vw, 96px); }
  .hero-inner { grid-template-columns: 1.55fr 0.85fr; gap: clamp(48px, 4vw, 88px); }
  .section-head { max-width: 920px; }
  .case { grid-template-columns: minmax(260px, 400px) 1fr; gap: clamp(40px, 3.5vw, 68px); }
}
.hero-title {
  font-family: var(--font-display, var(--font-sans));
  font-weight: var(--hero-weight, 700);
  font-size: clamp(34px, 5.2vw, 62px);
  line-height: 1.16; letter-spacing: .005em; margin: 0 0 26px;
}
.hero-title span { display: block; }
.hero-sub { font-family: var(--font-mono); font-size: 13px; letter-spacing: .12em; color: var(--ink-faint); margin: 0 0 30px; }
.hero-lead { font-size: clamp(18px, 1.9vw, 23px); font-weight: 600; line-height: 1.7; margin: 0 0 22px; color: var(--ink); text-wrap: pretty; }
.hero-body { font-size: 15.5px; color: var(--ink-soft); margin: 0 0 34px; max-width: 56ch; text-wrap: pretty; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-card { display: flex; flex-direction: column; gap: 18px; }
.portrait {
  position: relative; aspect-ratio: 4/5; border-radius: var(--img-radius, 4px);
  overflow: hidden; border: 1px solid var(--line);
  display: grid; place-items: center; text-align: center;
  background:
    repeating-linear-gradient(45deg, var(--surface), var(--surface) 14px, color-mix(in srgb, var(--surface) 55%, var(--bg)) 14px, color-mix(in srgb, var(--surface) 55%, var(--bg)) 28px);
}
.portrait img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.portrait .portrait-ph-label { font-family: var(--font-display, var(--font-sans)); font-size: 17px; font-weight: 700; color: var(--ink-soft); line-height: 1.8; }
.portrait .portrait-ph-label small { font-family: var(--font-mono); font-size: 10px; letter-spacing: .3em; color: var(--ink-faint); font-weight: 400; }
.hero-card-meta { display: flex; flex-direction: column; gap: 4px; padding-left: 2px; }
.hc-role { font-family: var(--font-mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--accent-strong, var(--accent)); }
.hc-name { font-family: var(--font-display, var(--font-sans)); font-size: 26px; font-weight: 700; }
.hc-roman { font-size: 12px; letter-spacing: .06em; color: var(--ink-faint); }

/* ---------- fde ---------- */
.fde-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.fde-point { background: var(--bg); padding: 32px 28px; }
.fde-n { font-family: var(--font-mono); font-size: 13px; letter-spacing: .1em; color: var(--accent-strong, var(--accent)); }
.fde-pt { font-size: 18px; font-weight: 700; margin: 16px 0 12px; }
.fde-pd { font-size: 14.5px; color: var(--ink-soft); margin: 0; }
.fde-outro { max-width: 760px; margin: clamp(40px, 6vw, 64px) 0 0; font-size: 16px; color: var(--ink-soft); text-wrap: pretty; }

/* ---------- skills ---------- */
.skills { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 5vw, 64px) clamp(48px, 6vw, 88px); }
.skills .track { grid-column: 1 / -1; }
.skill-title { font-family: var(--font-display, var(--font-sans)); font-size: clamp(22px, 2.4vw, 28px); font-weight: 700; margin: 0 0 22px; }
.track-list { list-style: none; margin: 0 0 18px; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; }
.track-list li { padding: 14px 4px; border-top: 1px solid var(--line); font-size: 15.5px; color: var(--ink); }
.track-note { font-size: 14px; color: var(--ink-faint); font-style: italic; margin: 0; }

/* ---------- cases ---------- */
.disclaimer { font-size: 12.5px; color: var(--ink-faint); margin: 0; line-height: 1.7; }
.case-list { display: flex; flex-direction: column; }
.case {
  display: grid; grid-template-columns: minmax(280px, 42%) 1fr; gap: clamp(24px, 4vw, 56px);
  padding: clamp(40px, 5vw, 56px) 0; border-top: 1px solid var(--line); align-items: start;
}
.case:last-child { border-bottom: 1px solid var(--line); }
.case-figure { margin: 0; display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.case-img {
  display: block; width: 100%; aspect-ratio: 16 / 9;
  border: 1px solid var(--line); object-fit: cover;
}
.case-cap { display: flex; flex-direction: column; gap: 7px; }
.case-num { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--ink-faint); }
.case-tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent-strong, var(--accent)); line-height: 1.5; }
.case-titlewrap { display: flex; align-items: baseline; flex-wrap: wrap; gap: 12px; margin-bottom: 12px; }
.case-title { font-family: var(--font-display, var(--font-sans)); font-size: clamp(22px, 2.6vw, 30px); font-weight: 700; line-height: 1.3; }
a.case-title { transition: color .2s; }
a.case-title:hover { color: var(--accent-strong, var(--accent)); }
.case-title .ext { font-size: .7em; margin-left: 4px; vertical-align: super; }
.case-badge { font-family: var(--font-mono); font-size: 11px; letter-spacing: .05em; padding: 4px 10px; border: 1px solid var(--accent-strong, var(--accent)); color: var(--accent-strong, var(--accent)); border-radius: 999px; white-space: nowrap; }
.case-meta { font-size: 13.5px; color: var(--ink-faint); margin: 0 0 20px; letter-spacing: .02em; }
.case-situation { font-size: 15.5px; color: var(--ink); margin: 0 0 26px; max-width: 64ch; text-wrap: pretty; }
.case-pa { margin-bottom: 30px; }
.pa-block { position: relative; border-radius: 10px; }
.pa-label { display: inline-block; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 9px; }
.pa-block p { margin: 0; text-wrap: pretty; }
.pa-after { padding: 20px 22px; border: 1px solid color-mix(in srgb, var(--accent-strong, var(--accent)) 40%, var(--bg)); background: color-mix(in srgb, var(--accent-strong, var(--accent)) 9%, var(--bg)); }
.pa-after .pa-label { color: var(--accent-strong, var(--accent)); font-weight: 700; }
.pa-after p { font-size: 16.5px; line-height: 1.72; color: var(--ink); font-weight: 600; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.metrics.m-2 { grid-template-columns: repeat(2, 1fr); }
.metric { background: var(--surface); padding: 22px 20px; display: flex; flex-direction: column; gap: 8px; }
.metric-v { font-family: var(--font-display, var(--font-sans)); font-size: clamp(26px, 3.2vw, 36px); font-weight: 800; line-height: 1; letter-spacing: -.01em; color: var(--ink); }
.metric-l { font-size: 12.5px; color: var(--ink-soft); line-height: 1.5; }

/* ---------- explore ---------- */
.explore-note { font-family: var(--font-mono); font-size: 14px; font-weight: 400; color: var(--ink-faint); margin-left: 14px; letter-spacing: 0; }
.explore-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.explore-item { background: var(--bg); padding: 34px 32px; display: grid; grid-template-columns: 44px 1fr; gap: 18px; }
.explore-k { font-family: var(--font-display, var(--font-sans)); font-size: 34px; font-weight: 800; line-height: 1; color: var(--accent-strong, var(--accent)); }
.explore-t { font-size: 18px; font-weight: 700; margin: 4px 0 12px; }
.explore-d { font-size: 14.5px; color: var(--ink-soft); margin: 0; text-wrap: pretty; }

/* ---------- offclock ---------- */
.offclock { max-width: 100%; background: var(--surface-alt, var(--surface)); }
.offclock-inner { max-width: var(--maxw); margin: 0 auto; padding: clamp(48px, 7vw, 88px) var(--pad); }
.offclock-title { font-family: var(--font-display, var(--font-sans)); font-size: clamp(24px, 3vw, 34px); font-weight: 700; margin: 0 0 20px; }
.offclock-body { max-width: 720px; font-size: 16px; color: var(--ink-soft); margin: 0; text-wrap: pretty; }

/* ---------- contact ---------- */
.contact { text-align: center; }
.contact-inner { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; }
.contact-title { font-family: var(--font-display, var(--font-sans)); font-weight: var(--title-weight, 700); font-size: clamp(28px, 4vw, 46px); line-height: 1.3; margin: 0 0 22px; text-wrap: balance; }
.contact-body { font-size: 16.5px; color: var(--ink-soft); margin: 0 0 36px; text-wrap: pretty; }
.contact-actions { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

/* ---------- footer ---------- */
.site-footer { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; max-width: var(--maxw); margin: 0 auto; padding: 40px var(--pad) 56px; border-top: 1px solid var(--line); }
.foot-mark { font-family: var(--font-display, var(--font-sans)); font-weight: 800; letter-spacing: .14em; font-size: 18px; }
.foot-meta { display: flex; flex-direction: column; font-size: 13px; color: var(--ink-faint); margin-right: auto; }
.foot-site { font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft); }
.foot-site:hover { color: var(--ink); }

/* ---------- scroll fade-in ---------- */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity .7s ease, transform .7s ease;
  }
  .fade-in.is-inview {
    opacity: 1;
    transform: none;
  }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .site-nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-check:checked ~ .site-nav {
    display: flex; position: fixed; inset: 60px 0 auto 0; flex-direction: column; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px var(--pad) 20px;
  }
  .nav-check:checked ~ .site-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-card { order: -1; max-width: 320px; }
  .fde-grid { grid-template-columns: 1fr 1fr; }
  .skills { grid-template-columns: 1fr; }
  .case { grid-template-columns: 1fr; gap: 22px; }
  .case-figure { max-width: none; width: 100%; }
  .case-img { width: 100%; max-width: 100%; }
  .case-cap { flex-direction: row; align-items: baseline; gap: 14px; flex-wrap: wrap; }
  .explore-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .fde-grid { grid-template-columns: 1fr; }
  .metrics, .metrics.m-2 { grid-template-columns: 1fr; }
  .track-list { grid-template-columns: 1fr; }
  .hero-title { font-size: clamp(34px, 11vw, 48px); }
}