:root {
  --ink: #0f1117;
  --paper: #f7f5f0;
  --accent: #1a3a5c;
  --accent-light: #2b5f9e;
  --gold: #c9a84c;
  --muted: #6b7280;
  --border: #e0ddd6;
  --card-bg: #ffffff;
  --section-alt: #f0ede6;
  --green: #1a6b3a;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 6%;
  background: rgba(247,245,240,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}

.nav-logo {
  font-family: 'DM Serif Display', serif;
  font-size: 1.25rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color 0.2s;
}

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

/* ── SÉLECTEUR DE LANGUE ── */
.lang-switcher {
  display: flex;
  gap: 0.35rem;
  flex-shrink: 0;
}

.lang-btn {
  padding: 0.3rem 0.65rem;
  border: 1.5px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.lang-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.lang-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ── HERO ── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 6% 4rem;
  position: relative;
  overflow: hidden;
}

.hero-bg-line {
  position: absolute;
  right: 0; top: 0;
  width: 42%;
  height: 100%;
  background: var(--accent);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0% 100%);
  opacity: 0.06;
}

.hero-grid-dec {
  position: absolute;
  right: 8%;
  top: 50%;
  transform: translateY(-50%);
  width: 260px;
  height: 260px;
  border: 1px solid var(--border);
  border-radius: 50%;
  opacity: 0.5;
}
.hero-grid-dec::before {
  content: '';
  position: absolute;
  inset: 30px;
  border: 1px solid var(--border);
  border-radius: 50%;
}
.hero-grid-dec::after {
  content: '';
  position: absolute;
  inset: 60px;
  border: 1px solid var(--border);
  border-radius: 50%;
}

.hero-content { max-width: 640px; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--gold);
}

h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 1.05;
  color: var(--ink);
  margin-bottom: 1.5rem;
}
h1 em { font-style: italic; color: var(--accent); }

.hero-desc {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 480px;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

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

.btn-primary {
  display: inline-block;
  padding: 0.85rem 2rem;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background 0.2s, transform 0.2s;
}
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); }

.btn-outline {
  display: inline-block;
  padding: 0.85rem 2rem;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background 0.2s, color 0.2s, transform 0.2s;
}
.btn-outline:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }

/* ── SECTIONS ── */
section { padding: 6rem 6%; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gold);
}

h2 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 3rem;
}

/* ── ABOUT ── */
#about { background: var(--section-alt); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: start;
}

.about-avatar-wrap { position: relative; }

.about-avatar {
  width: 100%;
  aspect-ratio: 4/5;
  background: var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.about-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.about-avatar-dec {
  position: absolute;
  bottom: -16px;
  right: -16px;
  width: 80%;
  height: 80%;
  border: 2px solid var(--gold);
  border-radius: 4px;
  z-index: -1;
}

.about-text p { color: var(--muted); line-height: 1.8; margin-bottom: 1.25rem; }

.about-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.stat-num {
  font-family: 'DM Serif Display', serif;
  font-size: 2.25rem;
  color: var(--accent);
  display: block;
}
.stat-label { font-size: 0.8rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }

/* ── SKILLS ── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.75rem;
  transition: box-shadow 0.25s, transform 0.25s;
}
.skill-card:hover { box-shadow: 0 8px 24px rgba(15,17,23,0.08); transform: translateY(-3px); }

.skill-icon {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--accent);
  width: 42px;
  height: 42px;
  background: rgba(26,58,92,0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.skill-title { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.75rem; color: var(--ink); }
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.65rem;
  background: var(--section-alt);
  color: var(--muted);
  border-radius: 3px;
  border: 1px solid var(--border);
}
.tag.accent {
  background: rgba(26,58,92,0.08);
  color: var(--accent);
  border-color: rgba(26,58,92,0.15);
}

/* ── PROJECTS ── */
#projects { background: var(--section-alt); }

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 360px;
  transition: box-shadow 0.3s;
  margin-bottom: 2.5rem;
}
.project-card:last-child { margin-bottom: 0; }
.project-card:hover { box-shadow: 0 12px 40px rgba(15,17,23,0.1); }

/* Carte inversée : image à droite, texte à gauche */
.project-card--reverse {
  grid-template-columns: 1fr 1fr;
}
.project-card--reverse .project-visual {
  order: 2;
}
.project-card--reverse .project-info {
  order: 1;
}

.project-visual {
  background: var(--accent);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-visual--green {
  background: var(--green);
}

.project-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  display: block;
}

.project-info {
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.project-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.project-title {
  font-family: 'DM Serif Display', serif;
  font-size: 1.9rem;
  color: var(--ink);
  margin-bottom: 1rem;
  line-height: 1.15;
}

.project-desc { color: var(--muted); line-height: 1.75; font-size: 0.95rem; margin-bottom: 1.5rem; }
.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.75rem; }
.project-links { display: flex; gap: 1rem; }

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.project-link:hover { border-color: var(--accent); }

/* ── FORMATION ── */
.timeline { position: relative; max-width: 720px; }

.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-left: 2.5rem;
  padding-bottom: 3rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--paper);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-date {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.4rem;
}

.timeline-title {
  font-family: 'DM Serif Display', serif;
  font-size: 1.25rem;
  color: var(--ink);
  margin-bottom: 0.3rem;
}

.timeline-sub { font-size: 0.9rem; color: var(--muted); font-style: italic; margin-bottom: 0.75rem; }
.timeline-desc { font-size: 0.9rem; color: var(--muted); line-height: 1.7; }

/* ── CONTACT ── */
#contact { background: var(--section-alt); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-intro { color: var(--muted); line-height: 1.8; font-size: 1rem; margin-bottom: 2rem; }

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.contact-icon {
  width: 40px; height: 40px;
  background: var(--accent);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-icon svg { width: 18px; height: 18px; fill: #fff; }

.contact-text strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.15rem;
}
.contact-text a, .contact-text span { font-size: 0.95rem; color: var(--ink); text-decoration: none; font-weight: 500; }
.contact-text a:hover { color: var(--accent-light); }

/* ── FORM ── */
.contact-form { display: flex; flex-direction: column; gap: 1.25rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.form-group input,
.form-group textarea {
  padding: 0.85rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: 4px;
  background: var(--card-bg);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  color: var(--ink);
  transition: border-color 0.2s;
  outline: none;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { min-height: 140px; }

.form-submit {
  display: inline-block;
  padding: 0.9rem 2rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
  align-self: flex-start;
}
.form-submit:hover { background: var(--accent-light); transform: translateY(-2px); }

.form-success {
  display: none;
  padding: 1rem;
  background: rgba(26,58,92,0.08);
  border: 1px solid rgba(26,58,92,0.2);
  border-radius: 4px;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
}

/* ── FOOTER ── */
footer {
  padding: 2.5rem 6%;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--muted);
}
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--accent); }

/* ── ANIMATIONS ── */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .nav-links { gap: 1rem; }
  .nav-links a { font-size: 0.78rem; }
}

@media (max-width: 768px) {
  nav { flex-wrap: wrap; padding: 1rem 5%; }
  .nav-links { order: 3; width: 100%; justify-content: center; gap: 1rem; }
  .lang-switcher { order: 2; }

  #hero { padding: 9rem 5% 4rem; }
  .hero-grid-dec { display: none; }

  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-avatar { aspect-ratio: 3/2; }

  .project-card,
  .project-card--reverse {
    grid-template-columns: 1fr;
  }
  .project-card--reverse .project-visual { order: 0; }
  .project-card--reverse .project-info  { order: 1; }
  .project-visual { min-height: 220px; }

  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }

  footer { flex-direction: column; gap: 0.75rem; text-align: center; }
}