/* ── Variables ─────────────────────────────────────────── */
:root {
  --bg:          #0b0c0e;
  --bg2:         #111318;
  --surface:     #16181f;
  --border:      #ffffff10;
  --accent:      #5af0c4;
  --accent2:     #ff6b4a;
  --text:        #e8e8ea;
  --muted:       #6b6e7a;
  --card-h:      320px;
  --nav-h:       68px;
  --radius:      6px;
  --font-head:   'Fraunces', Georgia, serif;
  --font-body:   'DM Sans', sans-serif;
  --font-mono:   'DM Mono', monospace;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::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-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  cursor: none;
}

/* ── Custom cursor ─────────────────────────────────────── */
#cursor {
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 50%;
  position: fixed; top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.2s, width 0.2s, height 0.2s;
  mix-blend-mode: screen;
  will-change: transform;
}
#cursor-ring {
  width: 36px; height: 36px;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  position: fixed; top: 0; left: 0;
  pointer-events: none;
  z-index: 9998;
  opacity: 0;
  transition: opacity 0.2s, width 0.2s, height 0.2s;
  will-change: transform;
}

/* ── Noise overlay ─────────────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  opacity: 0.028;
  pointer-events: none;
  z-index: 9000;
}

/* ── Page entry animation ──────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
main {
  animation: fadeIn 0.45s ease forwards;
  padding-top: var(--nav-h);
}

/* ── Navigation ────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 48px;
  z-index: 100;
  background: linear-gradient(to bottom, var(--bg) 60%, transparent);
  transition: background 0.3s;
}
nav.scrolled {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--accent); }
.nav-links {
  display: flex; gap: 36px; list-style: none;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 100%;
  height: 1px;
  background: var(--accent);
  transition: right 0.25s ease;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); }
.nav-links a:hover::after,
.nav-links a.active::after { right: 0; }

/* ── Footer ─────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 10vw;
  display: flex; align-items: center; justify-content: space-between;
}
.footer-name {
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--muted);
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ── Divider ─────────────────────────────────────────────── */
.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0 10vw;
}

/* ── Page header (used by projects pages) ───────────────── */
.page-header {
  padding: 64px 10vw 48px;
}
.page-header-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.page-header-title {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.0;
}
.page-header-desc {
  margin-top: 18px;
  color: var(--muted);
  max-width: 520px;
  font-size: 0.95rem;
}

/* ── Filter bar ─────────────────────────────────────────── */
.filter-bar {
  padding: 0 10vw 40px;
  display: flex; gap: 10px; flex-wrap: wrap;
}
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 18px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: none;
  transition: all 0.2s;
}
.filter-btn:hover,
.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

/* ── Project grid ───────────────────────────────────────── */
.project-grid {
  padding: 0 10vw 100px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}
a.project-card {
  text-decoration: none;
  color: inherit;
  display: block;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 20px 60px #5af0c415;
}
.card-cover {
  height: var(--card-h);
  position: relative;
  overflow: hidden;
}
.card-cover-img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.project-card:hover .card-cover-img { transform: scale(1.04); }
.card-cover-gradient {
  width: 100%; height: 100%;
  position: absolute; inset: 0;
}
.card-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, #0b0c0ecc 0%, transparent 55%);
}
.card-body {
  padding: 22px 24px 26px;
}
.card-tags {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 12px;
}
.card-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 2px;
  background: var(--bg);
  color: var(--accent);
  border: 1px solid #5af0c430;
}
.card-tag.engine { color: var(--accent2); border-color: #ff6b4a30; }
.card-title {
  font-family: var(--font-head);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  line-height: 1.2;
}
.card-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}
.card-role {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.card-role em {
  font-style: normal;
  color: var(--accent);
}
.card-desc {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
}
.card-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  transition: gap 0.2s;
}
.project-card:hover .card-arrow { gap: 14px; }

.project-text strong {
  font-weight: 600;
  color: var(--accent); /* ou une couleur légèrement plus claire que le texte */
}

.project-text em {
  font-style: italic;
  color: var(--text); /* ou une teinte légèrement différente */
}

.project-text ul {
  margin: 1rem 0 1.5rem 1.5rem;
}

.project-text li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.callout {
  background: rgba(255, 255, 255, 0.05);
  border-left: 3px solid var(--accent);
  padding: 1.2rem 1.5rem;
  margin: 2rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.callout-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: block;
}


/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: none;
  transition: all 0.22s ease;
  display: inline-block;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border: 1.5px solid var(--accent);
  font-weight: 600;
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent);
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--text);
}

/* ── Lang picker ─────────────────────────────────────────── */
#lang-picker {
  position: fixed;
  bottom: 28px;
  left: 28px;
  z-index: 200;
}
#lang-trigger {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
#lang-trigger:hover {
  border-color: var(--accent);
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(90,240,196,0.15);
}
#lang-menu {
  position: absolute;
  bottom: 58px;
  left: 0;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 150px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  transform: translateY(8px) scale(0.96);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.2s cubic-bezier(0.4,0,0.2,1), opacity 0.2s ease;
  transform-origin: bottom left;
}
#lang-menu.open {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: all;
}
.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 4px;
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background 0.15s, color 0.15s;
  width: 100%;
  text-align: left;
}
.lang-option:hover {
  background: var(--surface);
  color: var(--text);
}
.lang-option.active {
  color: var(--accent);
  background: #5af0c410;
}
.lang-flag { font-size: 1.1rem; line-height: 1; }
.lang-flag-svg {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}
.lang-flag-svg svg {
  width: 22px;
  height: 15px;
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.1);
  display: block;
}
#lang-current-flag .lang-flag-svg svg {
  width: 24px;
  height: 16px;
  border-radius: 3px;
}
.lang-label { font-size: 0.7rem; }

@media (max-width: 768px) {
  #lang-picker { bottom: 20px; left: 16px; }
  #lang-trigger { width: 42px; height: 42px; font-size: 1.2rem; }
}

/* ── Burger button ───────────────────────────────────────── */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0;
  transition: border-color 0.2s;
  flex-shrink: 0;
}
.nav-burger:hover { border-color: var(--accent); }
.nav-burger span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease, background 0.2s;
  transform-origin: center;
}
.nav-burger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
  background: var(--accent);
}
.nav-burger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-burger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
  background: var(--accent);
}

/* ── Mobile nav overlay ──────────────────────────────────── */
.nav-mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(11, 12, 14, 0.6);
  backdrop-filter: blur(4px);
  z-index: 98;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.nav-mobile-overlay.visible {
  opacity: 1;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  nav { padding: 0 20px; }
  .page-header { padding: 48px 24px 36px; }
  .filter-bar { padding: 0 24px 32px; }
  .project-grid { padding: 0 24px 80px; grid-template-columns: 1fr; }
  footer { padding: 24px; flex-direction: column; gap: 12px; }

  /* Show burger, hide desktop links */
  .nav-burger { display: flex; }
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(280px, 80vw);
    background: var(--bg2);
    border-left: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    padding: 80px 36px 48px;
    z-index: 99;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .nav-links.open {
    transform: translateX(0);
  }
  .nav-links li {
    width: 100%;
    border-bottom: 1px solid var(--border);
  }
  .nav-links li:first-child {
    border-top: 1px solid var(--border);
  }
  .nav-links a {
    display: block;
    padding: 18px 0;
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    color: var(--muted);
    transition: color 0.2s, padding-left 0.2s;
  }
  .nav-links a:hover,
  .nav-links a.active {
    color: var(--accent);
    padding-left: 8px;
  }
  .nav-links a::after { display: none; }

  /* Prevent body scroll when menu open */
  body.nav-open { overflow: hidden; }
}