/* ==========================================================================
   Portfolio — Swiss Design (International Typographic Style)
   Base : tokens de design + système de grille 12 colonnes (mobile-first)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens de design (variables) — cf. research-swiss-design.md §5 & §6
   -------------------------------------------------------------------------- */
:root {
  /* Couleurs — crème / encre + accent (système à deux tons) */
  --bg: #f4efe3;          /* fond crème / papier */
  --fg: #1c1a15;          /* encre / texte (near-black chaud) */
  --accent: #003b2f;      /* vert profond — accent LISIBLE (texte, liens, dates) */
  --highlight: #01ff8d;   /* vert de marque — REMPLISSAGE uniquement (texte foncé par-dessus) */
  --highlight-ink: #04231a; /* texte à poser sur le highlight */
  --muted: #6b665a;       /* texte secondaire, légendes (taupe chaud) */
  --line: #d8d2c3;        /* bordures, lignes de grille */

  /* Typographie */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Space Grotesk", var(--font-sans);
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  /* Échelle typographique (ratio ~1.25–1.333, fluide via clamp) */
  --fs-body: 1rem;                              /* 16px */
  --fs-small: 0.8125rem;                        /* 13px */
  --fs-h4: 1.25rem;                             /* 20px */
  --fs-h3: clamp(1.5rem, 2.5vw, 1.75rem);       /* 24–28px */
  --fs-h2: clamp(2rem, 5vw, 2.5rem);            /* 32–40px */
  --fs-h1: clamp(2.75rem, 11vw, 6rem);          /* 44–96px */

  /* Espacement — système base 8 */
  --sp-1: 0.5rem;   /* 8 */
  --sp-2: 1rem;     /* 16 */
  --sp-3: 1.5rem;   /* 24 */
  --sp-4: 2rem;     /* 32 */
  --sp-6: 3rem;     /* 48 */
  --sp-8: 4rem;     /* 64 */
  --sp-12: 6rem;    /* 96 */

  /* Grille & container */
  --gap: 16px;
  --margin: clamp(16px, 5vw, 64px);
  --maxw: 1200px;

  /* Divers */
  --transition: 0.25s ease;

  /* Texture papier recyclé (grain SVG superposé sur le crème) */
  --paper-opacity: 0.09;
}

/* Mode sombre auto désactivé le temps de tester la palette crème/vert.
   Variante sombre verte à réactiver ultérieurement si souhaité :
   @media (prefers-color-scheme: dark) {
     :root { --bg: #002a21; --fg: #f4efe3; --muted: #9db3ab; --line: #0f4438; }
   } */

/* --------------------------------------------------------------------------
   2. Base
   -------------------------------------------------------------------------- */
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-feature-settings: "cv05", "ss01";
}

/* Grain « papier recyclé » : filtre SVG fractalNoise en data-URI, superposé
   sur le fond crème, derrière le contenu. Aucune image, ~0 Ko. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: var(--paper-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23p)'/%3E%3C/svg%3E");
  background-size: 300px 300px;
}

::selection {
  background: var(--highlight);
  color: var(--highlight-ink);
}

a {
  transition: color var(--transition);
}

a:hover {
  color: var(--accent);
}

/* Survol « marqueur » (highlight de marque) sur les liens interactifs */
.nav-list a:hover,
.hero-meta a:hover,
.project-link a:hover,
.contact-links a:hover {
  color: var(--highlight-ink);
  box-shadow: inset 0 -0.5em 0 var(--highlight);
}

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

/* Lien d'évitement (accessibilité clavier) */
.skip-link {
  position: absolute;
  left: var(--sp-2);
  top: -100%;
  z-index: 1000;
  background: var(--fg);
  color: var(--bg);
  padding: var(--sp-1) var(--sp-2);
}

.skip-link:focus {
  top: var(--sp-2);
}

/* --------------------------------------------------------------------------
   3. Système de grille 12 colonnes (mobile-first)
   Mobile : 4 col · Tablette : 8 col · Desktop : 12 col
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--margin);
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
}

@media (min-width: 640px) {
  :root { --gap: 20px; }
  .grid { grid-template-columns: repeat(8, 1fr); }
}

@media (min-width: 1024px) {
  :root { --gap: 24px; }
  .grid { grid-template-columns: repeat(12, 1fr); }
}

/* Utilitaires d'étendue de colonnes (desktop) */
@media (min-width: 1024px) {
  .col-span-3  { grid-column: span 3; }
  .col-span-4  { grid-column: span 4; }
  .col-span-5  { grid-column: span 5; }
  .col-span-6  { grid-column: span 6; }
  .col-span-7  { grid-column: span 7; }
  .col-span-8  { grid-column: span 8; }
  .col-span-12 { grid-column: span 12; }
  .col-start-2 { grid-column-start: 2; }
  .col-start-6 { grid-column-start: 6; }
  .col-start-7 { grid-column-start: 7; }
}

/* --------------------------------------------------------------------------
   4. Typographie
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--fs-h1); font-weight: 700; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); letter-spacing: -0.01em; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.index-num {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   5. Header / navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.0625rem;
}

.brand .brand-mark {
  color: var(--highlight);
}

.nav-list {
  display: flex;
  gap: var(--sp-4);
  align-items: center;
}

.nav-list a {
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-toggle {
  display: none;
}

/* Navigation mobile */
@media (max-width: 767px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-1);
    font-family: var(--font-mono);
    font-size: var(--fs-small);
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .primary-nav {
    position: fixed;
    inset: 64px 0 auto 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    transition: transform var(--transition);
  }

  .primary-nav[data-open="true"] {
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--margin);
  }

  .nav-list li {
    width: 100%;
    padding-block: var(--sp-2);
    border-top: 1px solid var(--line);
  }

  .nav-list a {
    font-size: var(--fs-h4);
  }
}

/* --------------------------------------------------------------------------
   6. Hero
   -------------------------------------------------------------------------- */
.hero {
  padding-block: var(--sp-12) var(--sp-8);
  border-bottom: 1px solid var(--line);
}

.hero .grid {
  align-items: end;
}

.hero-headline {
  grid-column: 1 / -1;
}

.hero-title {
  margin-top: var(--sp-2);
  text-transform: uppercase;
}

.hero-title .accent {
  color: var(--accent);
}

.hero-meta {
  grid-column: 1 / -1;
  margin-top: var(--sp-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-6);
}

.hero-lead {
  max-width: 60ch;
  color: var(--muted);
  font-size: var(--fs-h4);
  line-height: 1.4;
}

@media (min-width: 1024px) {
  .hero-headline { grid-column: 1 / span 9; }
  .hero-lead     { grid-column: 7 / span 6; }   /* asymétrie : décalé à droite */
  .hero-meta     { grid-column: 1 / span 6; }
}

.hero-role {
  display: inline-block;
  margin-top: var(--sp-3);
  padding: 0.35em 0.6em;
  background: var(--highlight);
  color: var(--highlight-ink);
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--fs-small);
}

/* --------------------------------------------------------------------------
   6b. Sections génériques
   -------------------------------------------------------------------------- */
.section {
  padding-block: var(--sp-12);
  border-bottom: 1px solid var(--line);
}

.section-head {
  margin-bottom: var(--sp-8);
}

.section-index {
  grid-column: 1 / -1;
}

.section-title {
  grid-column: 1 / -1;
  margin-top: var(--sp-2);
  max-width: 20ch;
}

@media (min-width: 1024px) {
  .section-title { grid-column: 1 / span 9; }
}

/* --- À propos ----------------------------------------------------------- */
.about-lead {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  font-size: var(--fs-h4);
  line-height: 1.45;
}

.about-lead strong { font-weight: 600; }

.about-facts {
  grid-column: 1 / -1;
  margin-top: var(--sp-4);
}

@media (min-width: 1024px) {
  .about-lead  { grid-column: 1 / span 7; }
  .about-facts { grid-column: 9 / span 4; margin-top: 0; }  /* asymétrie */
}

.facts {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.fact dt { margin-bottom: 2px; }
.fact dd { font-size: var(--fs-small); }

/* --- Timelines (expérience / formation) --------------------------------- */
.timeline-block {
  margin-top: var(--sp-8);
}

.timeline-heading {
  grid-column: 1 / -1;
  padding-bottom: var(--sp-2);
  border-bottom: 2px solid var(--fg);
  margin-bottom: var(--sp-2);
}

@media (min-width: 1024px) {
  .timeline-heading { grid-column: 1 / span 3; border-bottom: none; margin-bottom: 0; }
  .timeline { grid-column: 4 / span 9; }
}

.timeline {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
}

.timeline-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-1);
  padding-block: var(--sp-3);
  border-top: 1px solid var(--line);
}

.timeline-row:first-child { border-top: none; }

@media (min-width: 640px) {
  .timeline-row {
    grid-template-columns: 8rem 1fr;
    gap: var(--sp-4);
  }
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--accent);
  padding-top: 4px;
}

.timeline-org {
  color: var(--muted);
  margin-top: 2px;
}

.timeline-desc {
  margin-top: var(--sp-1);
  font-size: var(--fs-small);
  max-width: 60ch;
}

/* --- Projets ------------------------------------------------------------ */
.projects {
  grid-column: 1 / -1;
}

.project {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding-top: var(--sp-3);
  border-top: 2px solid var(--fg);
}

@media (min-width: 640px) {
  .project { grid-column: span 4; }
}

@media (min-width: 1024px) {
  .project { grid-column: span 4; }
}

.project .index-num { margin-bottom: var(--sp-1); }

.project-title {
  font-size: var(--fs-h4);
  font-weight: 600;
}

.project-desc {
  font-size: var(--fs-small);
  color: var(--muted);
  line-height: 1.5;
  flex-grow: 1;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1);
  margin-top: var(--sp-1);
}

.tags li {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border: 1px solid var(--line);
}

.project-link {
  margin-top: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
}

.project-internal { color: var(--muted); }

/* --- Compétences -------------------------------------------------------- */
.skills { grid-column: 1 / -1; }

.skill-group {
  grid-column: 1 / -1;
  padding-top: var(--sp-2);
  border-top: 1px solid var(--line);
  margin-bottom: var(--sp-4);
}

@media (min-width: 640px) { .skill-group { grid-column: span 4; } }
@media (min-width: 1024px) { .skill-group { grid-column: span 3; } }

.skill-group h3 { margin-bottom: var(--sp-2); }

.skill-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  font-size: var(--fs-small);
}

.certs-block { margin-top: var(--sp-6); }

.certs {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
}

@media (min-width: 1024px) { .certs { grid-column: 4 / span 9; } }

.certs li {
  padding-block: var(--sp-2);
  border-top: 1px solid var(--line);
  font-size: var(--fs-h4);
}

.certs .muted { color: var(--muted); font-size: var(--fs-small); }

/* --- Contact ------------------------------------------------------------ */
.contact-lead {
  grid-column: 1 / -1;
}

@media (min-width: 1024px) { .contact-lead { grid-column: 1 / span 7; } }

.contact-email {
  display: inline-block;
  margin-top: var(--sp-3);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 5vw, 3rem);
  letter-spacing: -0.02em;
  border-bottom: 2px solid var(--line);
  word-break: break-all;
}

.contact-email:hover { border-color: var(--accent); }

.contact-links {
  grid-column: 1 / -1;
  margin-top: var(--sp-6);
  display: flex;
  flex-direction: column;
}

@media (min-width: 1024px) {
  .contact-links { grid-column: 9 / span 4; margin-top: 0; }
}

.contact-links li {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  padding-block: var(--sp-2);
  border-top: 1px solid var(--line);
  font-size: var(--fs-h4);
}

.section-contact { border-bottom: none; }

/* --------------------------------------------------------------------------
   7. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding-block: var(--sp-8) var(--sp-4);
  border-top: 1px solid var(--line);
  margin-top: var(--sp-12);
}

.site-footer .eyebrow {
  display: block;
  margin-top: var(--sp-6);
}

/* --------------------------------------------------------------------------
   8. Animations sobres (reveal au scroll — désactivées si reduced-motion)
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}