/* ==========================================================
   lucienmasson.ch
   Palette tirée de la photo : glacier (papier froid), roche
   (encre), corde (le seul accent).
   ========================================================== */

@font-face {
  font-family: "Instrument Sans";
  src: url("../fonts/instrument-sans-latin-wdth-normal.woff2") format("woff2-variations"),
       url("../fonts/instrument-sans-latin-wdth-normal.woff2") format("woff2");
  font-weight: 400 700;
  font-stretch: 75% 100%;
  font-display: swap;
}
@font-face {
  font-family: "Fragment Mono";
  src: url("../fonts/fragment-mono-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

:root {
  --paper:    #F4F4F1;
  --paper-2:  #EAEAE5;
  --ink:      #121314;
  --ink-2:    #45484D;
  --ink-3:    #6B6E74;
  --rule:     #D8D8D2;
  --rope:     #E0531F;   /* la corde */
  --rope-ink: #B23F0E;   /* version texte, contraste AA */

  --sans: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "Fragment Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --head-h: 64px;
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--head-h) + 16px);
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
ol, ul { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: var(--rope); color: #fff; }

:focus-visible {
  outline: 2px solid var(--rope);
  outline-offset: 3px;
  border-radius: 2px;
}

svg { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.skip {
  position: absolute; left: 16px; top: -100px; z-index: 100;
  background: var(--ink); color: var(--paper); padding: 8px 14px;
}
.skip:focus { top: 12px; }

.accent { color: var(--rope-ink); }

.mini-label,
.section-label,
.eyebrow,
.facts dt,
.feature-meta dt,
.path-status,
.path-date,
.proj-num,
.proj-meta,
figcaption {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0;
  line-height: 1.5;
}

/* ---------------- header ---------------- */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.site-head.is-scrolled { border-bottom-color: var(--rule); }

.head-inner {
  height: var(--head-h);
  display: flex; align-items: center; gap: 32px;
}
.brand {
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
}
.nav { display: flex; gap: 28px; margin-left: auto; }
.nav a, .head-cta {
  font-size: 15px;
  color: var(--ink-2);
  position: relative;
  transition: color .15s ease;
}
.nav a:hover, .head-cta:hover { color: var(--ink); }
.nav a[aria-current="true"] { color: var(--ink); }
.nav a[aria-current="true"]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px;
  height: 1.5px; background: var(--rope);
}

.head-right { display: flex; align-items: center; gap: 20px; }
.lang {
  display: flex;
  font-family: var(--mono);
  font-size: 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 2px;
}
.lang button {
  padding: 3px 9px;
  border-radius: 999px;
  color: var(--ink-3);
  transition: color .15s ease, background .15s ease;
}
.lang button:hover { color: var(--ink); }
.lang button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.head-cta {
  color: var(--ink);
  font-weight: 500;
  border-bottom: 1.5px solid var(--ink);
  padding-bottom: 1px;
}

/* ---------------- hero ---------------- */
.hero { padding-top: clamp(32px, 6vw, 72px); }

.hero-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: 24px;
}
.hero-text {
  grid-column: 1 / span 7;
  display: flex; flex-direction: column; justify-content: space-between;
  gap: 48px;
  padding-bottom: 36px; /* aligne le bas du texte sur le bas de la photo (hors légende) */
}
.eyebrow {
  display: flex; align-items: center; gap: 12px;
  color: var(--ink-2);
}
.eyebrow::before {
  content: ""; width: 28px; height: 1.5px; background: var(--rope);
}

h1 {
  font-size: clamp(2.6rem, 5.8vw, 5.25rem);
  font-weight: 500;
  font-stretch: 92%;
  line-height: 1.0;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.h-muted { display: block; color: var(--ink-3); }

.lead {
  margin-top: 28px;
  max-width: 34em;
  font-size: clamp(1.05rem, 1.4vw, 1.2rem);
  line-height: 1.55;
  color: var(--ink-2);
}

.actions {
  margin-top: 36px;
  display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px;
}
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--ink); color: var(--paper);
  padding: 14px 20px;
  font-size: 16px; font-weight: 500;
  border-radius: 4px;
  transition: background .15s ease;
}
.btn:hover { background: var(--rope-ink); }
.btn svg, .link-arrow svg { transition: transform .2s ease; }
.btn:hover svg { transform: translateX(3px); }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 16px; font-weight: 500;
  padding: 14px 0;
}
.link-arrow span { border-bottom: 1px solid var(--rule); transition: border-color .15s ease; }
.link-arrow:hover span { border-color: var(--ink); }
.link-arrow:hover svg { transform: translateY(2px); }

.hero-photo { grid-column: 8 / -1; }
.hero-photo img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 62%;
  border-radius: 2px;
  background: var(--paper-2);
}
figcaption {
  margin-top: 12px;
  color: var(--ink-3);
  display: flex; gap: 10px;
}
figcaption::before { content: "↳"; color: var(--rope); }

.facts {
  margin-top: clamp(48px, 7vw, 88px);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  column-gap: 24px;
  border-top: 1px solid var(--ink);
}
.facts > div { padding: 18px 0 0; }
.facts dt { color: var(--ink-3); margin-bottom: 8px; }
.facts dd strong { display: block; font-weight: 500; font-size: 17px; line-height: 1.35; }
.facts dd span { display: block; color: var(--ink-2); font-size: 15px; margin-top: 2px; }

/* ---------------- sections ---------------- */
.section {
  margin-top: clamp(80px, 11vw, 144px);
}
.section-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: 24px;
}
.section-grid > * { min-width: 0; }
.section-label {
  grid-column: 1 / span 3;
  align-self: start;
  position: sticky;
  top: calc(var(--head-h) + 28px);
  padding-top: 22px;
  border-top: 1px solid var(--ink);
  color: var(--ink);
}
.section-body {
  grid-column: 4 / -1;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
}

h2 {
  font-size: clamp(2rem, 3.9vw, 3.25rem);
  font-weight: 500;
  font-stretch: 94%;
  line-height: 1.05;
  letter-spacing: -0.03em;
  max-width: 16em;
  text-wrap: balance;
  margin-bottom: clamp(32px, 4vw, 52px);
}
h3 {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.mini-label { color: var(--ink-3); margin-bottom: 12px; }

/* about */
.about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 48px;
}
.prose p { max-width: 36em; }
.prose p + p { margin-top: 1.1em; }
.offscreen {
  align-self: start;
  border-left: 1.5px solid var(--rope);
  padding-left: 20px;
  color: var(--ink-2);
  font-size: 16px;
}

/* ---------------- projets ---------------- */
.feature {
  padding-bottom: clamp(40px, 5vw, 64px);
}
.feature h3 {
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.feature-desc {
  margin-top: 14px;
  max-width: 40em;
  color: var(--ink-2);
}

/* schéma du pipeline */
.flow {
  margin-top: 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  --gap: 28px;
}
.flow-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--gap);
  counter-reset: step;
}
.step {
  position: relative;
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: 12px 14px 11px;
  border-radius: 3px;
}
.step b { display: block; font-weight: 500; font-size: 15px; line-height: 1.3; }
.step span { display: block; font-family: var(--mono); font-size: 12px; color: var(--ink-3); margin-top: 4px; }
.step + .step::before {           /* trait de liaison */
  content: ""; position: absolute;
  left: calc(-1 * var(--gap) - 1px); top: 50%;
  width: calc(var(--gap) - 4px); height: 1px;
  background: var(--ink-3);
}
.step + .step::after {            /* pointe de flèche */
  content: ""; position: absolute;
  left: -7px; top: calc(50% - 4px);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid var(--ink-3);
}

/* la boucle de retour, en couleur corde */
.flow-return {
  position: relative;
  height: 40px;
  margin: 0 calc((100% - 4 * var(--gap)) / 10);
  border: 1.5px solid var(--rope);
  border-top: 0;
  border-radius: 0 0 10px 10px;
}
.flow-return::before {            /* pointe vers Prometheus */
  content: ""; position: absolute;
  left: -5.5px; top: -1px;
  border-left: 4.5px solid transparent;
  border-right: 4.5px solid transparent;
  border-bottom: 7px solid var(--rope);
}
.flow-return span {
  position: absolute; left: 50%; bottom: -10px;
  transform: translateX(-50%);
  background: var(--paper);
  padding: 0 12px;
  font-family: var(--mono); font-size: 12px; line-height: 20px;
  color: var(--rope-ink);
  white-space: nowrap;
}

.feature-meta {
  margin-top: 48px;
  display: flex; flex-wrap: wrap; gap: 16px 48px;
}
.feature-meta dt { color: var(--ink-3); margin-bottom: 2px; }
.feature-meta dd { font-weight: 500; }

/* liste */
.proj-list { border-top: 1px solid var(--ink); }
.proj {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) minmax(160px, 220px);
  gap: 8px 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--rule);
}
.proj-num { color: var(--ink-3); padding-top: 3px; }
.proj p { color: var(--ink-2); max-width: 38em; margin-top: 6px; font-size: 16px; }
.proj p.proj-meta { margin-top: 0; padding-top: 4px; color: var(--ink-2); font-size: 13px; display: flex; flex-direction: column; gap: 4px; }

/* ---------------- compétences ---------------- */
.skills { border-top: 1px solid var(--ink); }
.skills > div {
  display: grid;
  grid-template-columns: minmax(140px, 220px) minmax(0, 1fr);
  gap: 4px 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}
.skills dt { color: var(--ink-3); font-size: 15px; padding-top: 1px; }
.skills dd { font-size: 17px; }

/* ---------------- parcours ---------------- */
.path { --date-w: 128px; --mark-w: 32px; }
.path li {
  position: relative;
  display: grid;
  grid-template-columns: var(--date-w) var(--mark-w) minmax(0, 1fr);
  padding-bottom: 36px;
}
.path li:last-child { padding-bottom: 0; }
.path-date { color: var(--ink-2); padding-top: 3px; }
.path-mark { position: relative; }
.path-mark::before {
  content: ""; position: absolute;
  left: 50%; top: 8px;
  width: 11px; height: 11px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--rope);
}
/* segment de corde entre deux étapes */
.path li:not(:last-child)::after {
  content: ""; position: absolute;
  left: calc(var(--date-w) + var(--mark-w) / 2);
  top: 22px; bottom: -6px;
  border-left: 2px solid var(--rope);
  transform: translateX(-50%);
}
.path li.is-now:not(:last-child)::after,
.path li.is-next:not(:last-child)::after {
  border-left: 1.5px dashed var(--ink-3);
}
.path li.is-now .path-mark::before {
  width: 13px; height: 13px; top: 7px;
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--rope) 20%, transparent);
}
.path li.is-next .path-mark::before {
  background: var(--paper);
  border: 1.5px solid var(--ink-3);
}
.path-status { color: var(--ink-3); margin-bottom: 2px; }
.is-now .path-status { color: var(--rope-ink); }
.path h3 { font-size: 19px; }
.path p:not(.path-status) { color: var(--ink-2); font-size: 16px; margin-top: 2px; }
.is-next h3 { color: var(--ink-2); }

/* ---------------- contact ---------------- */
.contact-title {
  font-size: clamp(2.75rem, 7vw, 6rem);
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: 24px;
}
.contact-lead { max-width: 32em; color: var(--ink-2); font-size: 18px; }
.contact-mail {
  display: inline-block;
  margin-top: 40px;
  font-size: clamp(1.5rem, 3.6vw, 2.75rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.2;
  border-bottom: 2px solid var(--rope);
  transition: color .15s ease;
  overflow-wrap: anywhere;
}
.contact-mail:hover { color: var(--rope-ink); }
.contact-links { margin-top: 28px; display: flex; gap: 28px; }
.contact-links a {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 500;
  border-bottom: 1px solid var(--rule);
}
.contact-links a:hover { border-color: var(--ink); }

/* ---------------- footer ---------------- */
.site-foot { margin-top: clamp(96px, 12vw, 160px); border-top: 1px solid var(--rule); }
.foot-inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 32px;
  padding-top: 24px; padding-bottom: 32px;
  font-size: 14px; color: var(--ink-3);
}

/* ==========================================================
   responsive
   ========================================================== */
@media (max-width: 1000px) {
  .nav { gap: 20px; }
  .section-label { grid-column: 1 / span 2; }
  .section-body { grid-column: 3 / -1; }
  .flow { --gap: 18px; }
  .step { padding: 10px 10px 9px; }
  .step b { font-size: 14px; }
}

@media (max-width: 860px) {
  .nav { display: none; }
  .head-right { margin-left: auto; }

  .hero-text { grid-column: 1 / -1; padding-bottom: 0; gap: 28px; }
  .hero-photo { grid-column: 1 / -1; margin-top: 44px; }
  .hero-photo img { aspect-ratio: 5 / 4; object-position: 50% 58%; }
  .facts { grid-template-columns: repeat(2, 1fr); row-gap: 8px; }

  .section-label {
    grid-column: 1 / -1; position: static;
    padding-top: 14px; margin-bottom: 20px;
  }
  .section-body { grid-column: 1 / -1; border-top: 0; padding-top: 0; }

  .about-cols { grid-template-columns: 1fr; gap: 32px; }

  .proj { grid-template-columns: 36px minmax(0, 1fr); }
  .proj p.proj-meta { grid-column: 2; flex-direction: row; flex-wrap: wrap; gap: 4px 16px; }
}

@media (max-width: 720px) {
  /* schéma en vertical, la boucle passe sur la droite */
  .flow { grid-template-columns: minmax(0, 1fr) 44px; --gap: 18px; }
  .flow-steps { grid-template-columns: 1fr; }
  .step + .step::before {
    left: 50%; top: calc(-1 * var(--gap) - 1px);
    width: 1px; height: calc(var(--gap) - 4px);
  }
  .step + .step::after {
    left: calc(50% - 4px); top: -7px;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 6px solid var(--ink-3);
    border-bottom: 0;
  }
  .flow-return {
    grid-column: 2; grid-row: 1;
    height: auto;
    margin: 28px 0 28px 0;
    border: 1.5px solid var(--rope);
    border-left: 0;
    border-radius: 0 10px 10px 0;
  }
  .flow-return::before {
    left: -1px; top: -5.5px;
    border-top: 4.5px solid transparent;
    border-bottom: 4.5px solid transparent;
    border-right: 7px solid var(--rope);
    border-left: 0;
  }
  .flow-return span {
    left: auto; right: -10px; bottom: auto; top: 50%;
    transform: translateY(-50%) rotate(180deg);
    writing-mode: vertical-rl;
    padding: 12px 0;
    line-height: 20px;
  }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .head-inner { gap: 16px; }
  .head-right { gap: 14px; }
  .facts { grid-template-columns: 1fr; }
  .facts > div { padding-top: 14px; }
  .facts > div + div { border-top: 1px solid var(--rule); }
  .skills > div { grid-template-columns: 1fr; }
  .path { --date-w: 0px; --mark-w: 28px; }
  .path li { grid-template-columns: var(--mark-w) minmax(0, 1fr); }
  .path-date { grid-column: 2; grid-row: 1; padding-top: 0; }
  .path-mark { grid-column: 1; grid-row: 1 / span 2; }
  .path li > div { grid-column: 2; }
}

/* ---------------- impression : le site sert de CV ---------------- */
@media print {
  @page { margin: 16mm; }
  body { font-size: 11pt; background: #fff; }
  .site-head, .skip, .actions, .lang, .hero-photo, .flow, .site-foot { display: none !important; }
  .hero-text { grid-column: 1 / -1; }
  .section { margin-top: 28pt; break-inside: avoid-page; }
  .section-label { position: static; }
  h1 { font-size: 28pt; }
  h2 { font-size: 18pt; margin-bottom: 12pt; }
  .contact-title { font-size: 22pt; }
  a { text-decoration: none; }
}