/* ==========================================================
   Romain François : feuille de style
   Encre sumi sur papier froid, accent indigo (aizome).
   Mise en page : une colonne aérée, sections empilées, fond de kana flottants.
   ========================================================== */

:root {
  color-scheme: light;
  --paper: #eef0ed;
  --paper-2: #e2e5e1;
  --ink: #121417;
  --ink-soft: #4a4f55;
  --line: rgba(18, 20, 23, .12);
  --accent: #2b4c7e;
  --accent-soft: rgba(43, 76, 126, .16);
  --on-ink: #eef0ed;
  --on-ink-soft: rgba(238, 240, 237, .7);
  --glass: rgba(255, 255, 255, .55);
  --live: #2f7d4f;
  --wip: #b7791f;

  --font-display: "Shippori Mincho", "Noto Serif JP", serif;
  --font-body: "Zen Kaku Gothic New", system-ui, sans-serif;
  --font-mono: "Fragment Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --radius: 18px;
  --container: 1120px;
  --header-h: 76px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Léger voile façon papier washi */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 15% 20%, rgba(43, 76, 126, .07), transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(20, 20, 20, .05), transparent 45%),
    var(--paper);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: 1.15; margin: 0; text-wrap: balance; }
p { margin: 0 0 1em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.mono { font-family: var(--font-mono); font-size: .85em; letter-spacing: .01em; }

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

/* ==========================================================
   Fond animé : hiraganas et katakana flottants
   Chaque <span> reçoit ses variables en ligne :
   --x position horizontale, --s taille, --d durée, --delay départ,
   --drift dérive latérale, --r rotation max (±25deg), --o opacité, --blur flou.
   ========================================================== */

.kana-sky {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.kana-sky span {
  position: absolute;
  top: 100%;
  left: var(--x);
  font-family: var(--font-display);
  font-size: var(--s);
  line-height: 1;
  color: #000;
  opacity: 0;
  filter: blur(var(--blur));
  will-change: transform, opacity;
  animation:
    kana-float var(--d) linear var(--delay) infinite,
    kana-spin calc(var(--d) * .8) ease-in-out var(--delay) infinite alternate;
}

/* Une partie des kana passe en gothique pour varier le trait */
.kana-sky span.g { font-family: var(--font-body); font-weight: 500; }

@keyframes kana-float {
  0% {
    translate: 0 0;
    opacity: 0;
  }
  10% { opacity: var(--o); }
  25% { translate: calc(var(--drift) * .6) -30vh; }
  50% { translate: calc(var(--drift) * -.4) -60vh; }
  75% { translate: var(--drift) -90vh; }
  90% { opacity: var(--o); }
  100% {
    translate: calc(var(--drift) * .2) calc(-100vh - 8rem);
    opacity: 0;
  }
}

/* Balancement autour de la verticale : --r vaut au plus ±25deg,
   le kana reste toujours dans le sens de lecture */
@keyframes kana-spin {
  from { rotate: calc(var(--r) * -.6); }
  to   { rotate: var(--r); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  /* Les kana restent figés à leur position de départ, déjà en plein vol */
  .kana-sky span { animation-play-state: paused; }
}

/* ==========================================================
   En-tête & menu
   ========================================================== */

.header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 50;
  height: var(--header-h);
  background: color-mix(in srgb, var(--paper) 72%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}

.header.is-scrolled { border-bottom-color: var(--line); }

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo { display: flex; align-items: center; gap: 12px; }

.logo__seal {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--on-ink);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  rotate: -4deg;
  transition: rotate .3s;
}

.logo:hover .logo__seal { rotate: 4deg; }

.logo__text {
  display: flex;
  flex-direction: column;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1;
}

.logo__text small {
  font-family: var(--font-body);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--ink-soft);
  margin-top: 5px;
}

.nav { display: flex; align-items: center; gap: 30px; }

.nav a {
  position: relative;
  font-size: .95rem;
  font-weight: 500;
}

.nav a:not(.nav__cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1.5px;
  background: var(--accent);
  scale: 0 1;
  transform-origin: right;
  transition: scale .35s ease;
}

.nav a:not(.nav__cta):hover::after,
.nav a.is-active::after { scale: 1 1; transform-origin: left; }

.nav__cta {
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--on-ink);
  transition: background .25s;
}

.nav__cta:hover { background: var(--accent); }

.burger {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: none;
  cursor: pointer;
  position: relative;
}

.burger span {
  position: absolute;
  left: 11px;
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: translate .3s, rotate .3s;
}

.burger span:first-child { top: 17px; }
.burger span:last-child { top: 25px; }
.burger[aria-expanded="true"] span:first-child { translate: 0 4px; rotate: 45deg; }
.burger[aria-expanded="true"] span:last-child { translate: 0 -4px; rotate: -45deg; }

/* ==========================================================
   Boutons
   ========================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  font: inherit;
  font-weight: 500;
  border: 1.5px solid var(--ink);
  background: none;
  color: inherit;
  cursor: pointer;
  transition: background .25s, color .25s, border-color .25s, translate .25s;
}

.btn:hover { translate: 0 -2px; }
.btn--dark { background: var(--ink); color: var(--on-ink); }
.btn--dark:hover { background: var(--accent); border-color: var(--accent); }
.btn--ghost:hover { background: var(--ink); color: var(--on-ink); }
.btn--light { background: var(--on-ink); color: var(--ink); border-color: var(--on-ink); }
.btn--light:hover { background: var(--accent); color: var(--on-ink); border-color: var(--accent); }
.btn--outline-light { border-color: var(--on-ink-soft); color: var(--on-ink); }
.btn--outline-light:hover { border-color: var(--on-ink); }

/* ==========================================================
   Accueil
   ========================================================== */

.hero {
  display: flex;
  align-items: center;
  min-height: min(calc(100svh - var(--header-h)), 820px);
  padding: 72px 0 96px;
}

.hero--page { min-height: 0; padding: 88px 0 56px; }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 28px;
}

.kicker::before {
  content: "";
  width: 32px;
  height: 1.5px;
  background: var(--accent);
}

.hero__title {
  font-size: clamp(3rem, 9vw, 6.4rem);
  letter-spacing: -.02em;
  line-height: 1.02;
  margin-bottom: 32px;
}

.hero__title--page { font-size: clamp(2.6rem, 7vw, 4.8rem); }

.ink {
  background: linear-gradient(transparent 64%, var(--accent-soft) 64%);
}

.hero__lead {
  max-width: 560px;
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.hero__meta { color: var(--accent); margin-bottom: 40px; }

.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* ==========================================================
   Sections
   ========================================================== */

.section { padding: 112px 0; }
.section--tight { padding: 32px 0; }
.section--flush { padding-top: 0; }

.section__head { margin-bottom: 52px; }

.section__jp {
  display: block;
  font-family: var(--font-display);
  font-size: .95rem;
  letter-spacing: .3em;
  color: var(--accent);
  margin-bottom: 10px;
}

.section__head h2,
.contact h2 { font-size: clamp(2.2rem, 5vw, 3.4rem); }

/* Tags techniques */
.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.tags li {
  font-family: var(--font-mono);
  font-size: .78rem;
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
}

.tags small { color: var(--accent); font-size: .7rem; }

/* Profil */
.profile {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 24px 80px;
  align-items: start;
}

.profile .section__head { margin-bottom: 0; }
.profile__text { font-size: 1.12rem; max-width: 64ch; }

.facts {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  margin: 40px 0 0;
  padding: 32px 0 0;
  border-top: 1px solid var(--line);
}

.facts dt {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.facts dd { margin: 0; font-weight: 500; }

/* En dehors du code */
.offline {
  grid-column: 1 / -1;
  margin-top: 16px;
  padding: 28px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
}

.offline__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.offline__title span {
  font-family: var(--font-display);
  font-size: .95rem;
  letter-spacing: .3em;
  color: var(--accent);
}

.offline__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px 40px;
}

.offline h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 12px;
}

.offline__feat { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; margin: 0; }
.offline__feat strong { font-family: var(--font-display); font-size: 1.35rem; }
.offline__feat .mono { color: var(--accent); }

/* Parcours */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.job {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 32px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.job:first-child { border-top: 0; padding-top: 0; }

.job__when {
  display: flex;
  flex-direction: column;
  color: var(--ink-soft);
  padding-top: 6px;
}

.job__when span:first-child { color: var(--ink); }
.job__when span:last-child::before { content: "→ "; color: var(--accent); }

.job__body h3 { font-size: 1.5rem; }
.job__at { color: var(--accent); }
.job__where { color: var(--ink-soft); margin: 4px 0 16px; }

.job__list {
  margin: 0 0 20px;
  padding-left: 1.1em;
  color: var(--ink-soft);
  max-width: 68ch;
}

.job__list li { margin-bottom: 6px; }
.job__list li::marker { color: var(--accent); }

.schools {
  margin-top: 24px;
  padding: 28px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
}

.schools__title {
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.schools ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }

.schools li {
  display: grid;
  grid-template-columns: 148px auto 1fr;
  align-items: baseline;
  gap: 12px 20px;
}

.schools li .mono { color: var(--ink-soft); }
.schools em { font-style: normal; color: var(--ink-soft); font-size: .95rem; }

/* Compétences */
.skills {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px 48px;
}

.skill h3 {
  font-size: 1.2rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

/* Teaser du Lab */
.lab-teaser {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: clamp(32px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) * 1.4);
  background: var(--glass);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: border-color .35s, box-shadow .35s;
}

.lab-teaser:hover {
  border-color: var(--accent);
  box-shadow: 0 24px 50px -28px rgba(43, 76, 126, .45);
}

.lab-teaser__kana {
  position: absolute;
  right: 120px;
  top: 50%;
  translate: 0 -50%;
  font-family: var(--font-display);
  font-size: 12rem;
  line-height: 1;
  color: var(--accent);
  opacity: .08;
  pointer-events: none;
}

.lab-teaser__body { position: relative; min-width: 0; }
.lab-teaser h2 { font-size: clamp(2rem, 4.5vw, 3rem); margin-bottom: 12px; }
.lab-teaser p { margin: 0; max-width: 52ch; color: var(--ink-soft); }

.lab-teaser__arrow {
  flex: none;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--on-ink);
  font-size: 1.5rem;
  transition: background .3s, translate .3s;
}

.lab-teaser:hover .lab-teaser__arrow { background: var(--accent); translate: 6px 0; }

/* Contact */
.contact {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 8vw, 96px) clamp(24px, 6vw, 80px);
  border-radius: calc(var(--radius) * 1.6);
  background: var(--ink);
  color: var(--on-ink);
  text-align: center;
}

.contact::before {
  content: "ん";
  position: absolute;
  right: -2%;
  bottom: -28%;
  font-family: var(--font-display);
  font-size: clamp(14rem, 30vw, 24rem);
  line-height: 1;
  color: rgba(255, 255, 255, .05);
  pointer-events: none;
}

.contact .section__jp { color: var(--on-ink-soft); }
.contact h2 { margin-bottom: 18px; }

.contact p {
  max-width: 480px;
  margin: 0 auto 36px;
  color: var(--on-ink-soft);
}

.contact__actions {
  position: relative;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================
   Page Lab
   ========================================================== */

.lab {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.project {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: translate .35s, box-shadow .35s, border-color .35s;
}

.project:hover {
  translate: 0 -4px;
  border-color: transparent;
  box-shadow: 0 24px 50px -24px rgba(20, 20, 20, .3);
}

.project__kana {
  position: absolute;
  right: 20px;
  top: 8px;
  font-family: var(--font-display);
  font-size: 7rem;
  line-height: 1;
  color: var(--ink);
  opacity: .06;
  pointer-events: none;
  transition: opacity .35s, rotate .5s;
}

.project:hover .project__kana { opacity: .12; rotate: -8deg; }

.project__top {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.status { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); }

.status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-soft);
}

.status--live::before { background: var(--live); box-shadow: 0 0 0 4px rgba(47, 125, 79, .15); }
.status--wip::before { background: var(--wip); }
.status--idea::before { background: var(--accent); }
.status--pause::before { background: transparent; box-shadow: inset 0 0 0 1.5px var(--ink-soft); }

.project h2 { font-size: 1.6rem; margin-bottom: 12px; }
.project p { color: var(--ink-soft); max-width: 52ch; }
.project .tags { margin-top: auto; padding-top: 8px; }

/* Pied de page */
.footer { padding: 36px 0; border-top: 1px solid var(--line); }

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: .9rem;
  color: var(--ink-soft);
}

.footer__jp { font-family: var(--font-display); letter-spacing: .3em; }

/* ==========================================================
   Apparition au défilement (activée par JS)
   ========================================================== */

.js .reveal.is-pending {
  opacity: 0;
  translate: 0 28px;
  transition: opacity .8s ease, translate .8s cubic-bezier(.2, .8, .2, 1);
}

.js .reveal.is-pending.is-visible { opacity: 1; translate: 0 0; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal.is-pending { opacity: 1; translate: none; transition: none; }
}

/* ==========================================================
   Responsive
   ========================================================== */

@media (max-width: 900px) {
  .profile { grid-template-columns: 1fr; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .skills { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab { grid-template-columns: 1fr; }
  .job { grid-template-columns: 1fr; gap: 12px; }
  .job__when { flex-direction: row; gap: 8px; }
  .job__when span:last-child::before { content: "→ "; }
  .nav { gap: 22px; }
}

@media (max-width: 760px) {
  .burger { display: block; }

  .nav {
    position: fixed;
    top: calc(var(--header-h) + env(safe-area-inset-top, 0px));
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 8px;
    padding: 24px 16px 32px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    translate: 0 -12px;
    visibility: hidden;
    transition: opacity .3s, translate .3s, visibility .3s;
  }

  .nav.is-open { opacity: 1; translate: 0 0; visibility: visible; }
  .nav a { font-size: 1.15rem; padding: 8px 0; }
  /* .nav .nav__cta : doit l'emporter sur « .nav a » juste au-dessus */
  .nav .nav__cta {
    align-self: stretch;
    margin-top: 12px;
    padding: 14px 24px;
    text-align: center;
  }

  .kana-sky span { font-size: calc(var(--s) * .7); }

  .section { padding: 80px 0; }
  .section--tight { padding: 24px 0; }
  .facts,
  .skills,
  .offline__grid { grid-template-columns: 1fr; }
  .offline { padding: 24px 20px; }
  .schools { padding: 24px 20px; }
  .schools li { grid-template-columns: 1fr; gap: 0; }
  .lab-teaser__kana { right: -10px; font-size: 9rem; }
  .lab-teaser__arrow { width: 52px; height: 52px; }
  .project { padding: 26px 22px; }
  .footer__inner { flex-direction: column; text-align: center; }
}