/* Ryutaro Matsuda — personal site
   Monochrome, editorial. One accent colour. Works without JavaScript. */

:root {
  --bg: #ffffff;
  --ink: #111111;
  --ink2: #444444;
  --mute: #767676;
  --line: #e7e6e2;
  --soft: #f6f5f1;
  --accent: #b5402d;
  --max: 1120px;
  --gut: clamp(20px, 5vw, 56px);
  --serif: "Noto Serif JP", "Noto Serif CJK JP", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", serif;
  --sans: "Noto Sans JP", "Noto Sans CJK JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --latin: "Jost", "Noto Sans JP", "Noto Sans CJK JP", "Hiragino Sans", sans-serif;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.9 var(--sans);
  letter-spacing: .02em;
  word-break: auto-phrase;
  line-break: strict;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
ul { margin: 0; padding: 0; }
p { margin: 0 0 1em; text-wrap: pretty; }

.wrap { max-width: var(--max); margin: 0 auto; padding-inline: var(--gut); }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; z-index: 100; text-decoration: none; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .93);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.head-row { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 84px; }
.brand { text-decoration: none; display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font: 600 24px/1.1 var(--latin); letter-spacing: .01em; }
.brand-by { font-size: 12px; color: var(--ink2); letter-spacing: .16em; margin-top: 7px; }
.nav { display: flex; gap: clamp(18px, 3vw, 40px); }
.nav a {
  text-decoration: none; font-size: 14px; font-weight: 500; letter-spacing: .06em;
  padding: 10px 0 4px; border-top: 2px solid transparent; transition: border-color .2s;
}
.nav a:hover { border-top-color: var(--line); }
.nav a[aria-current="page"] { border-top-color: var(--ink); }
.nav-toggle {
  display: none; appearance: none; background: none; border: 1px solid var(--ink);
  padding: 9px 14px; font: 500 12px/1 var(--latin); letter-spacing: .18em; cursor: pointer; color: var(--ink);
}

/* ---------- Common blocks ---------- */
.eyebrow {
  font: 500 12px/1 var(--latin); letter-spacing: .24em; text-transform: uppercase; color: var(--mute);
  display: flex; align-items: center; gap: 14px; margin: 0 0 26px;
}
.eyebrow::before { content: ""; width: 32px; height: 1px; background: var(--accent); }

.btns { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 26px;
  border: 1px solid var(--ink); text-decoration: none; font-size: 14px; font-weight: 500; letter-spacing: .08em;
  transition: background .2s, color .2s, border-color .2s; background: transparent; color: var(--ink);
}
.btn:hover { background: var(--ink); color: #fff; }
.btn.solid { background: var(--ink); color: #fff; }
.btn.solid:hover { background: var(--accent); border-color: var(--accent); }
.btn.light { border-color: #fff; color: #fff; }
.btn.light:hover { background: #fff; color: var(--ink); }

.sec { padding-block: clamp(56px, 8vw, 104px); }
.sec.soft { background: var(--soft); }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: clamp(28px, 4vw, 48px); }
.sec-title { font: 500 clamp(24px, 3vw, 34px)/1.35 var(--serif); margin: 0; letter-spacing: .03em; }
.sec-title small { display: block; font: 500 12px/1 var(--latin); letter-spacing: .24em; text-transform: uppercase; color: var(--mute); margin-bottom: 14px; }
.more { font-size: 13.5px; font-weight: 500; letter-spacing: .08em; text-decoration: none; border-bottom: 1px solid var(--ink); padding-bottom: 3px; white-space: nowrap; }
.more:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Home: hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.12fr .88fr; gap: clamp(32px, 6vw, 96px);
  align-items: center; padding-block: clamp(44px, 7vw, 104px) clamp(48px, 7vw, 96px);
}
h1.display { font: 500 clamp(30px, 4.3vw, 56px)/1.36 var(--serif); letter-spacing: .02em; margin: 0 0 28px; }
.lead { font-size: clamp(15px, 1.5vw, 17px); color: var(--ink2); max-width: 34em; margin: 0 0 36px; }
.hero-photo { position: relative; isolation: isolate; }
.hero-photo img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 14%; background: var(--soft); }
.hero-photo::after { content: ""; position: absolute; right: -16px; bottom: -16px; width: 62%; height: 62%; border: 1px solid var(--line); z-index: -1; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); }
.stat { padding: 28px 24px 8px 0; }
.stat + .stat { padding-left: 24px; border-left: 1px solid var(--line); }
.stat .n { font: 500 clamp(38px, 5vw, 58px)/1 var(--serif); letter-spacing: -.01em; white-space: nowrap; }
.stat .n small { font-size: .36em; margin-left: 4px; letter-spacing: .04em; font-family: var(--sans); }
.stat .l { font-size: 13.5px; color: var(--ink2); margin-top: 12px; line-height: 1.7; }

/* career strip */
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 28px 0; }
.steps.four { grid-template-columns: repeat(4, 1fr); }
.step { border-top: 2px solid var(--ink); padding: 14px 20px 0 0; }
.step b { font: 500 24px/1 var(--serif); display: block; margin-bottom: 10px; }
.step span { font-size: 13.5px; color: var(--ink2); line-height: 1.75; display: block; }

/* cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cards.two { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); padding: 28px 26px 26px;
  display: flex; flex-direction: column; gap: 10px; text-decoration: none; transition: border-color .2s, transform .2s;
}
a.card:hover { border-color: var(--ink); transform: translateY(-3px); }
.card .y { font: 500 12px/1 var(--latin); letter-spacing: .2em; color: var(--accent); }
.card h3 { font: 500 20px/1.5 var(--serif); margin: 0; }
.card p { margin: 0; font-size: 14px; color: var(--ink2); line-height: 1.85; }
.card ul { padding-left: 1.1em; margin: 4px 0 0; font-size: 14px; color: var(--ink2); line-height: 1.85; }
.card li { margin-bottom: 4px; }
.card li::marker { color: var(--accent); }

/* dated list */
.list { list-style: none; border-top: 1px solid var(--ink); }
.list li { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.list .d { font: 500 13px/1.9 var(--latin); letter-spacing: .14em; color: var(--mute); }
.list .t b { font-weight: 700; }
.list .t span { display: block; font-size: 14px; color: var(--ink2); }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 88px); }
.col-title { font: 600 13px/1 var(--latin); letter-spacing: .24em; text-transform: uppercase; margin: 0 0 18px; }

/* CTA */
.cta { background: var(--ink); color: #fff; padding-block: clamp(56px, 8vw, 96px); }
.cta .wrap { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta h2 { font: 500 clamp(24px, 3.4vw, 38px)/1.4 var(--serif); margin: 0 0 10px; }
.cta p { margin: 0; color: #cfcfcf; font-size: 15px; }

/* ---------- Inner pages ---------- */
.page-head { padding-block: clamp(44px, 7vw, 92px) clamp(24px, 4vw, 44px); border-bottom: 1px solid var(--line); }
.page-head h1 { font: 500 clamp(32px, 4.6vw, 52px)/1.3 var(--serif); margin: 0; letter-spacing: .03em; }
.page-head p { margin: 18px 0 0; color: var(--ink2); max-width: 40em; }

.profile { display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(32px, 6vw, 88px); align-items: start; padding-block: clamp(40px, 6vw, 80px) clamp(56px, 8vw, 104px); }
.profile aside { position: sticky; top: 120px; }
.profile aside img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 14%; background: var(--soft); }
.profile aside figcaption { font-size: 12px; color: var(--mute); letter-spacing: .12em; margin-top: 12px; }
.name-ja { font: 500 clamp(34px, 4.4vw, 48px)/1.25 var(--serif); margin: 0; letter-spacing: .04em; }
.name-en { font: 500 14px/1 var(--latin); letter-spacing: .24em; color: var(--mute); margin: 14px 0 30px; text-transform: uppercase; }
.bio { font-size: 15.5px; }
.h3l { font: 600 13px/1 var(--latin); letter-spacing: .24em; text-transform: uppercase; margin: 56px 0 6px; padding-bottom: 14px; border-bottom: 1px solid var(--ink); }
.dl { margin: 0; }
.dl > div { display: grid; grid-template-columns: 84px 1fr; gap: 16px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.dl dt { font: 500 14px/1.9 var(--latin); letter-spacing: .1em; color: var(--mute); }
.dl dd { margin: 0; font-size: 15px; }
.dl dd small { display: block; color: var(--ink2); font-size: 13.5px; }

.cap { color: var(--ink2); font-size: 14.5px; margin: -8px 0 22px; max-width: 46em; }

/* career timeline (Gantt) */
.gantt-legend { display: flex; flex-wrap: wrap; gap: 8px 24px; margin: 0 0 20px; font-size: 13px; color: var(--ink2); }
.gantt-legend .litem { display: inline-flex; align-items: center; gap: 8px; }
.gantt-legend i { width: 11px; height: 11px; border-radius: 3px; display: inline-block; }
.gantt-wrap { overflow-x: auto; padding-bottom: 8px; border-top: 1px solid var(--ink); }
.gantt-wrap svg { display: block; min-width: 880px; width: 100%; height: auto; }
.scroll-hint { display: none; font-size: 12.5px; color: var(--mute); margin: 0 0 10px; }

/* password-gated inner page */
.gate { max-width: 420px; margin: 0 auto; padding-block: clamp(64px, 10vw, 120px); text-align: center; }
.gate h1 { font: 500 clamp(24px, 3vw, 30px)/1.4 var(--serif); margin: 0 0 14px; }
.gate p { color: var(--ink2); font-size: 14.5px; margin: 0 0 28px; }
.gate-form { display: flex; gap: 10px; }
.gate-form input[type="password"] {
  flex: 1; border: 1px solid var(--ink); background: #fff; padding: 13px 16px;
  font: 400 15px/1.5 var(--sans); letter-spacing: .04em;
}
.gate-form input[type="password"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.gate-form button {
  border: 1px solid var(--ink); background: var(--ink); color: #fff; padding: 13px 22px;
  font: 500 14px/1 var(--sans); letter-spacing: .06em; cursor: pointer; transition: background .2s;
}
.gate-form button:hover { background: var(--accent); border-color: var(--accent); }
.gate-err { color: var(--accent); font-size: 13.5px; margin-top: 14px; min-height: 1.4em; }
.gate-note { margin-top: 34px; font-size: 12.5px; color: var(--mute); }
.ptable { width: 100%; border-collapse: collapse; margin: 0 0 8px; font-size: 14px; }
.ptable caption { text-align: left; font: 500 clamp(20px, 2.4vw, 24px)/1.4 var(--serif); margin: 0 0 6px; caption-side: top; }
.ptable th { text-align: left; font-size: 12.5px; letter-spacing: .08em; color: var(--mute); font-weight: 500; padding: 10px 14px; border-bottom: 1px solid var(--ink); white-space: nowrap; }
.ptable td { padding: 16px 14px; border-bottom: 1px solid var(--line); vertical-align: top; line-height: 1.8; }
.ptable td.n { font-weight: 700; width: 250px; }
.ptable td.y { white-space: nowrap; color: var(--ink2); width: 110px; }
.ptable td.p { font-weight: 700; white-space: nowrap; width: 140px; }
.ptable .tag { display: inline-block; font-size: 11.5px; letter-spacing: .04em; padding: 3px 9px; border-radius: 20px; white-space: nowrap; }
.ptable .tag.ok { background: #e8f1ed; color: #1f8f6e; }
.ptable .tag.chk { background: #f4ecdd; color: #a9791f; }
.pwrap { overflow-x: auto; }
.pwrap table { min-width: 720px; }

.subnav { position: sticky; top: 84px; z-index: 40; background: #fff; border-bottom: 1px solid var(--line); }
.subnav .wrap { display: flex; gap: 6px 26px; overflow-x: auto; padding-block: 10px; white-space: nowrap; }
.subnav a { font-size: 13.5px; text-decoration: none; padding: 6px 0; border-bottom: 2px solid transparent; color: var(--ink2); }
.subnav a:hover { color: var(--ink); border-bottom-color: var(--ink); }

.work-sec { padding-block: 64px 8px; scroll-margin-top: 140px; }
.work-sec:last-of-type { padding-bottom: 96px; }
.work-sec h2 { font: 500 clamp(22px, 2.6vw, 28px)/1.4 var(--serif); margin: 0 0 6px; letter-spacing: .03em; display: flex; align-items: baseline; gap: 14px; }
.work-sec h2 span { font: 500 12px/1 var(--latin); letter-spacing: .2em; color: var(--accent); }
.work-sec .cap { color: var(--ink2); font-size: 14.5px; margin: 0 0 22px; max-width: 46em; }
.rows { border-top: 1px solid var(--ink); }
.row { display: grid; grid-template-columns: 112px 1fr; gap: 18px 24px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.rows.nodate .row { grid-template-columns: 1fr; }
.row .y { font: 500 13px/1.9 var(--latin); color: var(--mute); letter-spacing: .06em; }
.row b { font-weight: 700; }
.row span.s { display: block; font-size: 14.5px; color: var(--ink2); }
.work-sec .cards { margin-top: 4px; }

.svc { display: grid; grid-template-columns: repeat(2, 1fr); column-gap: clamp(28px, 5vw, 72px); border-top: 1px solid var(--ink); }
.svc article { padding: 30px 0 30px; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 52px 1fr; gap: 14px; }
.svc .no { font: 500 13px/2 var(--latin); letter-spacing: .16em; color: var(--accent); }
.svc h3 { font: 500 20px/1.5 var(--serif); margin: 0 0 8px; }
.svc p { margin: 0; font-size: 14.5px; color: var(--ink2); }

.contact-box { padding-block: clamp(48px, 7vw, 96px); max-width: 720px; }
.mail { display: inline-block; font: 500 clamp(22px, 3.6vw, 34px)/1.4 var(--serif); text-decoration: none; border-bottom: 2px solid var(--ink); padding-bottom: 4px; word-break: break-all; }
.mail:hover { color: var(--accent); border-color: var(--accent); }
.note { font-size: 13.5px; color: var(--mute); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--ink); padding-block: 44px 36px; }
.foot-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 32px; flex-wrap: wrap; }
.foot-brand { font: 600 20px/1.2 var(--latin); }
.foot-brand small { display: block; font: 400 12px/1 var(--sans); letter-spacing: .16em; color: var(--ink2); margin-top: 8px; }
.foot-nav { display: flex; gap: 12px 26px; flex-wrap: wrap; font-size: 13.5px; }
.foot-nav a { text-decoration: none; }
.foot-nav a:hover { color: var(--accent); }
.copy { font-size: 12px; color: var(--mute); margin-top: 32px; letter-spacing: .08em; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .hero-photo { max-width: 460px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { padding-left: 0; border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); margin-top: 24px; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .steps.four { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .profile { grid-template-columns: 1fr; }
  .profile aside { position: static; order: -1; max-width: 420px; }
  .svc { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .head-row { min-height: 72px; }
  .subnav { top: 72px; }
  .brand-name { font-size: 21px; }
  .js .nav-toggle { display: inline-flex; }
  .js .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; background: #fff; flex-direction: column; gap: 0; padding: 8px var(--gut) 20px; border-bottom: 1px solid var(--line); }
  .js .nav.open { display: flex; }
  .js .nav a { padding: 14px 0; border-top: 0; border-bottom: 1px solid var(--line); font-size: 15px; }
  .js .nav a[aria-current="page"] { color: var(--accent); }
  .no-js .head-row { flex-wrap: wrap; padding-block: 12px; }
  .no-js .nav { flex-wrap: wrap; gap: 4px 18px; }
  .cards, .cards.two { grid-template-columns: 1fr; }
  .steps, .steps.four { grid-template-columns: repeat(2, 1fr); }
  .list li { grid-template-columns: 1fr; gap: 2px; }
  .row { grid-template-columns: 1fr; gap: 0; }
  .dl > div { grid-template-columns: 64px 1fr; gap: 10px; }
  .svc article { grid-template-columns: 40px 1fr; }
  .sec-head { flex-direction: column; align-items: flex-start; }
  .gate-form { flex-direction: column; }
  .ptable td.n { width: auto; }
  .scroll-hint { display: block; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}
@media print {
  .site-header, .subnav, .cta, .nav-toggle { display: none !important; }
  .profile aside { position: static; }
}