/* ---------------------------------------------------------------------------
   Design tokens — thème sombre, sobre, minimaliste
--------------------------------------------------------------------------- */
:root {
  --bg:        #0d0f12;
  --bg-elev:   #14171c;
  --bg-elev-2: #1b1f26;
  --border:    #262b33;
  --text:      #e6e8ec;
  --text-dim:  #9aa3af;
  --text-faint:#5b636e;
  --accent:    #5eead4;
  --accent-dim:#2dd4bf;
  --radius:    14px;
  --maxw:      980px;
  --font:      "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --mono:      "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

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

.container { width: min(100% - 2.5rem, var(--maxw)); margin-inline: auto; }

/* ---------------------------------------------------------------------------
   Header / nav
--------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; }

.nav-links { display: flex; gap: 2rem; list-style: none; }

.nav-links a {
  color: var(--text-dim);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ---------------------------------------------------------------------------
   Hero
--------------------------------------------------------------------------- */
.hero { padding: clamp(4rem, 12vw, 8rem) 0 clamp(3rem, 8vw, 6rem); }

.hero-kicker {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 560px;
  margin-bottom: 2.2rem;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ---------------------------------------------------------------------------
   Buttons
--------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn:active { transform: translateY(1px); }

.btn-primary { background: var(--accent); color: #06231f; }
.btn-primary:hover { background: var(--accent-dim); }

.btn-ghost { border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--text-faint); background: var(--bg-elev); }

/* ---------------------------------------------------------------------------
   Sections
--------------------------------------------------------------------------- */
.section { padding: clamp(3rem, 8vw, 5.5rem) 0; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.section-head h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ---------------------------------------------------------------------------
   About
--------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 3rem;
}
.about-text p { color: var(--text-dim); margin-bottom: 1rem; max-width: 60ch; }
.about-text em { color: var(--text-faint); }

.about-interests h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: 1rem;
}
.interests{ list-style: none; display: flex; flex-wrap: wrap; gap: 0.6rem; }
.interests li {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
}

/* ---------------------------------------------------------------------------
   Projects
--------------------------------------------------------------------------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.2rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: var(--bg-elev-2);
}
.project-card.is-link {
  cursor: pointer;
}
.project-card.is-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Bannière image (optionnelle) */
.project-media {
  aspect-ratio: 16 / 9;
  background: var(--bg-elev-2);
  overflow: hidden;
}
.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(65%);
  transition: transform 0.3s ease, filter 0.3s ease;
}
.project-card:hover .project-media img {
  transform: scale(1.04);
  filter: brightness(100%);
}

/* Contenu texte sous l'image */
.project-body {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  padding: 1.5rem;
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.9rem;
}
.project-links { display: flex; gap: 0.8rem; }
.project-links a {
  color: var(--text-faint);
  font-size: 0.8rem;
  font-family: var(--mono);
  transition: color 0.2s ease;
}
.project-links a:hover { color: var(--accent); }

.project-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}
.project-card p {
  color: var(--text-dim);
  font-size: 0.92rem;
  flex-grow: 1;
  margin-bottom: 1.2rem;
}

.project-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.project-tags span {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent-dim);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
}

/* ---------------------------------------------------------------------------
   Contact
--------------------------------------------------------------------------- */
.contact-lead { color: var(--text-dim); font-size: 1.1rem; max-width: 520px; margin-bottom: 2rem; }
.contact-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem 1.2rem;
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.contact-links a:hover { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }

/* ---------------------------------------------------------------------------
   Footer
--------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 2rem;
}
.site-footer p { color: var(--text-faint); font-size: 0.85rem; }

/* ---------------------------------------------------------------------------
   Reveal animation
--------------------------------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------------------------------------------------------------------------
   Responsive
--------------------------------------------------------------------------- */
@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }

  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav-links.open { max-height: 240px; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 1rem 1.25rem; border-top: 1px solid var(--border); }
}

/* ===========================================================================
   PAGE PROJET (détail)
   =========================================================================== */

/* --- Hero parallax --- */
.project-hero {
  position: relative;
  min-height: min(78vh, 640px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.project-hero-bg {
  position: absolute;
  top: -20%;
  left: 0;
  right: 0;
  height: 140%;
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  will-change: transform;
  z-index: 0;
}
/* La "bande" assombrie qui fond vers le fond du site pour la lisibilité */
.project-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(
      to bottom,
      rgba(13, 15, 18, 0.35) 0%,
      rgba(13, 15, 18, 0.55) 45%,
      rgba(13, 15, 18, 0.85) 80%,
      var(--bg) 100%
    );
}
.project-hero-content {
  position: relative;
  z-index: 2;
  width: min(100% - 2.5rem, var(--maxw));
  margin-inline: auto;
  padding-block: 3rem;
}
.back-link {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
  transition: color 0.2s ease;
}
.back-link:hover { color: var(--accent); }
.project-hero-title {
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1rem;
}
.project-hero-tagline {
  color: var(--text-dim);
  font-size: 1.15rem;
  max-width: 620px;
  margin-bottom: 1.5rem;
}

/* --- Corps de l'article --- */
.project-article { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.project-block { margin-bottom: clamp(3rem, 7vw, 5rem); }

.prose { max-width: none; }
.prose h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.prose p { color: var(--text-dim); margin-bottom: 1rem; }
.prose strong { color: var(--text); font-weight: 600; }
.prose em { color: var(--text-faint); }
.prose ul,
.prose ol { color: var(--text-dim); padding-left: 1.4rem; margin-bottom: 1rem; }
.prose ol { margin-left: 1.5rem; }
.prose ol li::marker { color: var(--accent-dim); font-family: var(--mono); }
.prose li { margin-bottom: 0.5rem; }
.prose code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  color: var(--accent-dim);
}

/* Bloc de pseudo-code / algorithme */
.prose .code-block {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.7;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 1.1rem 1.3rem;
  margin: 1.6rem 0;
  color: var(--text-dim);
  overflow-x: auto;
  tab-size: 4;
}
.code-block .kw  { color: var(--accent); font-weight: 500; }
.code-block .arr { color: var(--accent-dim); }
.code-block .cm  { color: var(--text-faint); font-style: italic; }

/* Figures / images */
.media-figure { margin: 0; }

/* Grande image autonome dans un bloc : plus petite et centrée */
.project-block > .media-figure {
  max-width: 620px;
  margin-inline: auto;
  text-align: center;
}
.media-figure img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
}
.media-figure figcaption {
  margin-top: 0.6rem;
  font-size: 0.82rem;
  color: var(--text-faint);
  font-family: var(--mono);
}
.project-block .prose + .media-figure,
.project-block .prose + .media-gallery,
.project-block .prose + .video-wrap { margin-top: 1.5rem; }
.project-block .media-figure + .prose,
.project-block .video-wrap + .prose { margin-top: 2.5rem; }

/* Variante réduite, centrée (schéma / vidéo plus discrète) */
.project-block > .media-figure.is-small { max-width: 380px; }
.video-wrap.is-small { max-width: 560px; margin-inline: auto; }

/* Galerie */
.media-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.2rem;
}
.media-gallery .media-figure img { cursor: zoom-in; transition: opacity 0.2s ease; }
.media-gallery .media-figure img:hover { opacity: 0.85; }

/* Lightbox (agrandissement des images de galerie au clic) */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  padding: 2rem;
  background: rgba(0, 0, 0, 0.85);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease;
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox img {
  max-width: min(90vw, 1100px);
  max-height: 80vh;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  object-fit: contain;
}
.lightbox figcaption {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.85rem;
  text-align: center;
}
.lightbox-close {
  position: absolute;
  top: 1.2rem;
  right: 1.5rem;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.15); }

/* Images côte à côte et centrées (explication du jeu / du bot) */
.explanation_game,
.explanation_bot {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 3rem;
  margin: 1.5rem 0;
}
.explanation_game .media-figure,
.explanation_bot .media-figure {
  flex: 0 1 320px;
  max-width: 320px;
}

/* Seule différence : explanation_bot garde des angles droits */
.explanation_bot .media-figure img {
  border-radius: 0;
}

/* Vidéo */
.video-wrap {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
}
.video-wrap video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.article-cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }