/* ============================================================
   PAUL EHLINGER — Développeur web | Global Stylesheet
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=Instrument+Serif:ital@0;1&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&display=swap');

/* ─── RESET & ROOT ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:    #0b0f1a;
  --navy2:   #111827;
  --navy3:   #1c2433;
  --blue:    #2563EB;
  --blue-l:  #3B82F6;
  --blue-dim: rgba(37,99,235,0.12);
  --blue-glow: rgba(37,99,235,0.25);
  --white:   #f9fafb;
  --off:     #e5e9f0;
  --grey:    #9ba3af;
  --grey-l:  #ccd2db;
  --accent:  #10B981;   /* vert émeraude accent */
  --accent-dim: rgba(16,185,129,0.15);

  --font-display: 'Instrument Serif', serif;
  --font-ui:      'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  --radius: 12px;
  --radius-sm: 6px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--navy);
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ─── TYPOGRAPHY ─── */
h1, h2, h3 { font-family: var(--font-display); font-weight: 400; line-height: 1.1; }
h4, h5, h6, .label, nav, button { font-family: var(--font-ui); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue-l);
  margin-bottom: 1.25rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 22px; height: 2px;
  background: var(--blue);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.1;
  color: var(--white);
}
.section-title em {
  font-style: italic;
  color: var(--blue-l);
}

/* ─── LAYOUT ─── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section { padding: 6rem 0; }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.75rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover {
  background: var(--blue-l);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--blue-glow);
}
.btn-outline {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.2);
  color: var(--white);
}
.btn-outline:hover {
  border-color: var(--blue-l);
  color: var(--blue-l);
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--accent);
  color: var(--navy);
  font-weight: 700;
}
.btn-accent:hover {
  background: #059669;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--accent-dim);
}

/* ─── NAV ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  padding: 1.4rem 0;
  transition: var(--transition);
}
.nav.scrolled {
  background: rgba(11,15,26,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 0.9rem 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}
.nav-logo {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.nav-logo span:first-child { color: var(--white); font-size: 1.05rem; }
.nav-logo span:last-child  { color: var(--blue-l); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}
.nav-links a {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--grey-l);
  letter-spacing: 0.04em;
  transition: color 0.25s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 1.5px;
  background: var(--blue-l);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.active { color: var(--white); }
.nav-links a.active::after { transform: scaleX(1); }

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
}
.nav-burger span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--white);
  transition: var(--transition);
  border-radius: 2px;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--navy2);
  z-index: 190;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.mobile-menu.open {
  display: flex;
  opacity: 1;
  pointer-events: all;
}
.mobile-menu a {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-style: italic;
  color: var(--white);
  transition: color 0.25s;
}
.mobile-menu a:hover { color: var(--blue-l); }
.mobile-close {
  position: absolute;
  top: 1.5rem; right: 2rem;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.8rem;
  cursor: pointer;
  font-family: var(--font-ui);
}

/* ─── PAGE HERO (inner pages) ─── */
.page-hero {
  padding: 9rem 0 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -100px; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--blue-dim) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); margin-bottom: 1.2rem; }
.page-hero p  { font-size: 1.1rem; color: var(--grey); max-width: 580px; margin: 0 auto; }

/* ─── REVEAL ANIMATIONS ─── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }
.reveal-delay-4 { transition-delay: 0.48s; }

/* ─── CARDS ─── */
.card {
  background: var(--navy2);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
}
.card:hover {
  border-color: rgba(37,99,235,0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

/* ─── TAGS ─── */
.tag {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border-radius: 100px;
  background: var(--blue-dim);
  color: var(--blue-l);
  border: 1px solid rgba(37,99,235,0.2);
}
.tag-green {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: rgba(16,185,129,0.2);
}

/* ─── FOOTER ─── */
footer {
  background: var(--navy2);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 4rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-brand p { font-size: 0.9rem; color: var(--grey); line-height: 1.8; margin-top: 1rem; max-width: 280px; }
.footer-col h4 {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 1.2rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.7rem; }
.footer-col ul a { font-size: 0.9rem; color: var(--grey-l); transition: color 0.25s; }
.footer-col ul a:hover { color: var(--blue-l); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.8rem 2rem 0;
  font-size: 0.82rem;
  color: var(--grey);
}
.footer-bottom a { color: var(--grey); transition: color 0.25s; }
.footer-bottom a:hover { color: var(--blue-l); }
.footer-bottom-links { display: flex; gap: 1.5rem; }

/* ─── FORM ─── */
.form-group { margin-bottom: 1.4rem; }
.form-group label {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 0.5rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--navy3);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.25s;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
.form-group select option { background: var(--navy2); }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-dim);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--grey); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .nav-links, .nav .btn { display: none; }
  .nav-burger { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  section { padding: 4rem 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
  .container { padding: 0 1.2rem; }
}

/* ─── LANGUAGE TOGGLE ─── */
.lang-toggle {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.lang-btn {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.25rem 0;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--grey);
  transition: color 0.2s;
  line-height: 1;
}
.lang-btn:hover { color: var(--white); }
.lang-btn.active { color: var(--white); }
.lang-sep {
  width: 1px;
  height: 12px;
  background: rgba(255,255,255,0.15);
  flex-shrink: 0;
  margin: 0 0.45rem;
}