/* ===================================================================
   Portfolio — Kiriane Kuekam
   Concept : plan technique / carnet d'ingénieure — fond blanc,
   grille et bloc de titre façon dessin technique, accents bleu plan
   et ambre.
=================================================================== */

:root {
  /* Couleurs */
  --paper: #FFFFFF;
  --paper-tint: #F4F7FB;
  --ink: #14202B;
  --ink-soft: rgba(20, 32, 43, 0.66);
  --ink-faint: rgba(20, 32, 43, 0.42);
  --line: rgba(20, 32, 43, 0.14);
  --line-strong: rgba(20, 32, 43, 0.28);
  --blueprint: #1E4B7A;
  --blueprint-deep: #123151;
  --blueprint-tint: rgba(30, 75, 122, 0.08);
  --amber: #F2A73B;
  --amber-ink: #4A2E05;

  /* Typo */
  --font-display: "Big Shoulders Display", sans-serif;
  --font-body: "Public Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  /* Echelle */
  --step-0: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  --step-1: clamp(1.125rem, 1.05rem + 0.35vw, 1.375rem);
  --step-2: clamp(1.375rem, 1.2rem + 0.7vw, 1.875rem);
  --step-3: clamp(1.75rem, 1.4rem + 1.4vw, 2.75rem);
  --step-4: clamp(2.5rem, 1.9rem + 2.6vw, 4.5rem);

  --radius: 3px;
  --ease: cubic-bezier(0.16, 0.84, 0.44, 1);
  --nav-h: 64px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
ul, ol, dl { margin: 0; padding: 0; list-style: none; }
dt, dd { margin: 0; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); font-weight: 600; letter-spacing: 0.005em; }
p { margin: 0; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--blueprint);
  color: var(--paper);
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  z-index: 200;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; }

/* ---- Layout helpers ---- */
.section__inner {
  max-width: 1080px;
  margin-inline: auto;
  padding: 5.5rem 1.5rem;
}
.icon { flex-shrink: 0; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blueprint);
  margin-bottom: 1.75rem;
  display: block;
}
.eyebrow--ink { color: var(--blueprint); }

/* ---- Sheets (sections) ---- */
.sheet { position: relative; border-top: 1px dashed var(--line); }
.sheet--blueprint { background: var(--paper-tint); }
.sheet--paper { background: var(--paper); }

.grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, var(--blueprint-tint) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, var(--blueprint-tint) 0 1px, transparent 1px 32px);
  mask-image: linear-gradient(to bottom, black, transparent 95%);
}

/* ---- Nav ---- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: 1080px;
  margin-inline: auto;
  height: 100%;
  padding-inline: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav__mark { margin-right: auto; }
.mark {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 0.3rem 0.55rem;
  letter-spacing: 0.04em;
}
.nav__links { display: flex; gap: 1.75rem; }
.nav__link {
  font-size: 0.9rem;
  color: var(--ink-soft);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.2s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -2px;
  height: 2px;
  background: var(--amber);
  transition: right 0.25s var(--ease);
}
.nav__link:hover, .nav__link.is-active { color: var(--ink); }
.nav__link.is-active::after { right: 0; }
.nav__toggle { display: none; }
.nav__toggle .icon--close { display: none; }
.nav__toggle.is-open .icon--menu { display: none; }
.nav__toggle.is-open .icon--close { display: block; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  padding: 0.85rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--amber); color: var(--amber-ink); }
.btn--primary:hover { background: #e7981f; }
.btn--ghost { border-color: var(--line-strong); color: var(--ink); }
.btn--ghost:hover { border-color: var(--blueprint); background: var(--blueprint-tint); }
.btn--sm { padding: 0.5rem 0.8rem; font-size: 0.78rem; }
.nav__cv { display: inline-flex; }

/* ---- Hero ---- */
.hero {
  min-height: calc(100dvh - var(--nav-h));
  padding-top: calc(var(--nav-h) + 3rem);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 3rem;
}
.hero__content { flex: 1 1 420px; max-width: 620px; }
.hero__title {
  font-size: clamp(3rem, 2.1rem + 4.2vw, 6rem);
  font-weight: 700;
  line-height: 0.94;
  letter-spacing: 0;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}
.hero__role {
  font-size: var(--step-1);
  color: var(--blueprint);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
  margin-bottom: 1.25rem;
}
.hero__text {
  color: var(--ink-soft);
  max-width: 46ch;
  margin-bottom: 2.25rem;
  font-size: 1.05rem;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ---- Title block (bloc de titre technique) ---- */
.title-block {
  position: relative;
  flex: 0 1 340px;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 var(--blueprint-tint);
}
.title-block::before, .title-block::after {
  content: "+";
  position: absolute;
  font-family: var(--font-mono);
  color: var(--blueprint);
  font-size: 1rem;
  line-height: 1;
  z-index: 1;
}
.title-block::before { top: -8px; left: -8px; }
.title-block::after { bottom: -8px; right: -8px; }

.title-block__strip {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--blueprint);
  background: var(--blueprint-tint);
  padding: 0.55rem 1.1rem;
  border-bottom: 1px solid var(--line-strong);
}
.title-block__head {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 1.75rem 1.25rem;
}
.title-block__badge {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  border: 1px solid var(--ink);
  width: 52px; height: 52px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--blueprint);
}
.title-block__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  text-transform: uppercase;
  line-height: 1.2;
  letter-spacing: 0.01em;
}
.title-block__rows {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 0 1.75rem 1.5rem;
}
.title-block__row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 0.75rem;
  border-bottom: 1px dotted var(--line-strong);
  padding-bottom: 0.6rem;
}
.title-block__row dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--blueprint);
  padding-top: 0.15rem;
}
.title-block__row dd { font-size: 0.88rem; font-weight: 500; }

.title-block__sign {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.75rem 1.4rem;
  border-top: 1px solid var(--line);
}
.title-block__sign-mark { width: 84px; height: 22px; color: var(--blueprint); flex-shrink: 0; }
.title-block__sign p {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
}

/* ---- About ---- */
.about { display: flex; gap: 3.5rem; flex-wrap: wrap; }
.about__lead {
  flex: 1 1 320px;
  font-size: var(--step-2);
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.35;
  color: var(--ink);
}
.about__facts {
  flex: 1 1 300px;
  display: grid;
  gap: 1.4rem;
}
.fact { border-left: 2px solid var(--blueprint); padding-left: 1rem; }
.fact dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-bottom: 0.25rem;
}
.fact dd { font-size: 0.98rem; }

/* ---- Skills ---- */
.skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2.5rem 3rem; }
.skill-group__title {
  font-size: 1.05rem;
  margin-bottom: 1rem;
  color: var(--blueprint);
}
.tag-list { display: flex; flex-wrap: wrap; column-gap: 1.1rem; row-gap: 0.5rem; }
.tag {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding-left: 0.85rem;
  color: var(--ink-soft);
}
.tag::before {
  content: "";
  position: absolute;
  left: 0; top: 0.5em;
  width: 6px; height: 1px;
  background: var(--blueprint);
}
.tag-list--sm .tag { font-size: 0.72rem; }

.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--blueprint);
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--blueprint);
  border-radius: 0;
}

/* ---- Projects (fiches techniques, coin corné au survol) ---- */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.75rem; }
.project-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--line-strong);
  padding: 1.75rem 1.75rem 1.75rem 1.6rem;
  background: var(--paper);
  transition: border-color 0.25s var(--ease);
}
.project-card::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 0; height: 0;
  border-style: solid;
  border-width: 0 0 0 0;
  border-color: transparent var(--blueprint-tint) transparent transparent;
  transition: border-width 0.25s var(--ease);
}
.project-card:hover { border-color: var(--blueprint); }
.project-card:hover::after { border-width: 0 22px 22px 0; }
.project-card__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.project-card__date { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-faint); }
.project-card__title { font-size: 1.2rem; margin-bottom: 0.6rem; }
.project-card__text { color: var(--ink-soft); font-size: 0.94rem; margin-bottom: 1.1rem; }
.project-card .tag-list { margin-bottom: 1.25rem; }
.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--blueprint);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}
.project-card__link:hover { border-color: var(--blueprint); }

/* ---- Timeline (règle graduée) ---- */
.timeline { border-left: 1px solid var(--line-strong); margin-left: 0.5rem; }
.timeline__item { position: relative; padding: 0 0 2.75rem 2.25rem; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -1px; top: 0.5rem;
  width: 16px; height: 2px;
  background: var(--blueprint);
}
.timeline__item--current::before { background: var(--amber); width: 26px; }
.timeline__date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--blueprint);
  margin-bottom: 0.35rem;
}
.timeline__body h3 { font-size: 1.05rem; margin-bottom: 0.4rem; display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.timeline__body p { color: var(--ink-soft); font-size: 0.92rem; max-width: 60ch; }

/* ---- Contact ---- */
.contact { display: flex; gap: 3.5rem; flex-wrap: wrap; justify-content: space-between; }
.contact__intro { flex: 1 1 320px; }
.contact__title { font-size: var(--step-2); margin-bottom: 0.75rem; }
.contact__intro p { color: var(--ink-soft); max-width: 42ch; }
.contact__list { flex: 1 1 320px; display: flex; flex-direction: column; gap: 0.9rem; }
.contact__list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  transition: border-color 0.2s var(--ease);
}
.contact__list li:hover { border-color: var(--blueprint); }
.contact__link { display: flex; align-items: center; gap: 0.75rem; font-size: 0.95rem; }
.contact__link--static { color: var(--ink); cursor: default; }
.copy-btn { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: var(--radius); color: var(--ink-faint); }
.copy-btn:hover { color: var(--blueprint); background: var(--blueprint-tint); }
.icon--check { display: none; color: #1a8f4c; }
.copy-btn.is-copied .icon--copy { display: none; }
.copy-btn.is-copied .icon--check { display: block; }

/* ---- Footer ---- */
.footer { border-top: 1px solid var(--line); }
.footer__inner {
  padding-block: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.footer__top { font-family: var(--font-mono); color: var(--ink-soft); }
.footer__top:hover { color: var(--blueprint); }

/* ---- Reveal on scroll : géré par GSAP/ScrollTrigger (js/script.js) ---- */