/* ──────────────────────────────────────────────────────────────
   ZEH SOLUTION — Shared Design System
   Used by index.html and filiere-talents.html
   ────────────────────────────────────────────────────────────── */

:root {
  /* Palette */
  --ink:           #111110;
  --ink-muted:     #5C5B56;
  --ink-soft:      #9A9892;
  --line:          #E4E1D7;
  --line-soft:     #EEEAE0;
  --paper:         #FAF8F3;
  --paper-warm:    #F2EEE3;
  --paper-deep:    #EBE6D7;
  --white:         #FFFFFF;
  --navy:          #142844;
  --navy-deep:     #0D1E36;
  --navy-light:    #2A4570;
  --navy-pale:     rgba(20,40,68,0.06);
  --kraft:         #C8A96E;
  --kraft-deep:    #A88847;
  --kraft-pale:    rgba(200,169,110,0.14);
  --kraft-glow:    rgba(200,169,110,0.32);

  /* Type */
  --serif:         'DM Serif Display', 'Times New Roman', serif;
  --sans:          'DM Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;

  /* Motion */
  --ease:          cubic-bezier(.22,1,.36,1);
  --spring:        cubic-bezier(.34,1.4,.64,1);
  --tx-fast:       .2s var(--ease);
  --tx-base:       .35s var(--ease);
  --tx-slow:       .7s var(--ease);

  /* Layout */
  --nav-h:         68px;
  --container:     1240px;
  --pad-x:         clamp(1.25rem, 5vw, 4rem);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  font-weight: 300;
  background: var(--paper);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.7;
  letter-spacing: -.005em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--kraft); color: var(--white); }

img { max-width: 100%; display: block; }

a { color: inherit; }

/* ──────── Scroll progress ──────── */
#progress {
  position: fixed; top: 0; left: 0; right: 0;
  height: 2px; z-index: 200;
  background: linear-gradient(90deg, var(--navy), var(--kraft));
  transform: scaleX(0); transform-origin: left;
  transition: transform .12s linear;
}

/* ──────── Nav ──────── */
nav.site-nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  padding: 0 var(--pad-x);
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(250,248,243,.78);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s, box-shadow .3s;
}
nav.site-nav.scrolled {
  background: rgba(250,248,243,.92);
  border-bottom-color: var(--line-soft);
  box-shadow: 0 1px 24px rgba(20,40,68,.05);
}
.nav-logo { display: flex; align-items: center; gap: .65rem; text-decoration: none; }
.nav-logo .logo-img {
  height: 34px; width: auto;
  display: block;
  transition: opacity var(--tx-fast), transform .3s var(--spring);
}
.nav-logo:hover .logo-img { opacity: .7; transform: scale(1.02); }
.site-footer .nav-logo .logo-img {
  height: 28px;
  filter: invert(1) brightness(1.6);
}
.nav-logo .mark {
  width: 32px; height: 32px;
  background: var(--navy); color: var(--white);
  display: grid; place-items: center;
  font-family: var(--serif); font-size: 19px;
  border-radius: 8px;
  letter-spacing: -.04em;
  transition: transform .3s var(--spring), background var(--tx-fast);
}
.nav-logo:hover .mark { transform: rotate(-6deg) scale(1.05); background: var(--kraft); }
.nav-logo .wordmark {
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: -.02em;
  color: var(--ink);
  line-height: 1;
}
.nav-logo .wordmark em { font-style: italic; color: var(--kraft); margin-left: .1em; }

.nav-links {
  display: flex; align-items: center; gap: 2.25rem;
  list-style: none;
}
.nav-links a {
  font-family: var(--sans);
  font-size: 14px; font-weight: 400;
  color: var(--ink-muted); text-decoration: none;
  position: relative; padding: 4px 0;
  transition: color var(--tx-fast);
}
.nav-links a::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1.5px; background: var(--navy);
  transform: scaleX(0); transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.is-active { color: var(--ink); }
.nav-links a.is-active::after { transform: scaleX(1); background: var(--kraft); }

.nav-cta {
  font-size: 13px !important; font-weight: 500 !important;
  color: var(--white) !important;
  background: var(--navy);
  padding: 9px 18px !important; border-radius: 999px !important;
  text-decoration: none;
  transition: background var(--tx-fast), transform var(--tx-fast), box-shadow var(--tx-fast) !important;
  box-shadow: 0 4px 14px rgba(20,40,68,.18);
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { background: var(--navy-light); transform: translateY(-1px); box-shadow: 0 8px 22px rgba(20,40,68,.26); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  background: none; border: none; cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block; width: 22px; height: 1.5px;
  background: var(--ink); margin: 5px auto;
  transition: transform var(--tx-fast), opacity var(--tx-fast);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ──────── Section primitives ──────── */
section { padding: clamp(4rem, 8vw, 7rem) var(--pad-x); position: relative; }
.section-container { max-width: var(--container); margin: 0 auto; }

.eyebrow {
  display: inline-flex; align-items: center; gap: .7rem;
  font-size: 11px; font-weight: 500; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-muted);
  margin-bottom: 1rem;
}
.eyebrow::before {
  content: ''; display: block;
  width: 22px; height: 2px;
  background: var(--kraft); border-radius: 2px; flex-shrink: 0;
}
.eyebrow.on-dark { color: rgba(255,255,255,.6); }
.eyebrow.on-dark::before { background: var(--kraft); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -.025em;
  line-height: 1.08;
}

.h-display {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: 1.04;
  letter-spacing: -.035em;
}
.h-display em { font-style: italic; color: var(--kraft); }
.h-display .ink-soft { color: var(--ink-muted); font-style: italic; }

.h-section {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -.03em;
  margin-bottom: 1.25rem;
}
.h-section em { font-style: italic; color: var(--kraft); }
.h-section .ink-soft { color: var(--ink-muted); font-style: italic; }
.on-dark .h-section, .on-dark.h-section { color: var(--white); }

.lead {
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  font-weight: 300;
  line-height: 1.7;
  color: var(--ink-muted);
  max-width: 56ch;
}
.on-dark .lead { color: rgba(255,255,255,.65); }

/* ──────── Buttons ──────── */
.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--sans);
  font-size: 14.5px; font-weight: 500;
  padding: 14px 26px; border-radius: 999px;
  text-decoration: none; cursor: pointer; border: none;
  position: relative; overflow: hidden;
  transition: transform var(--tx-base), box-shadow var(--tx-base), background var(--tx-fast), color var(--tx-fast);
  white-space: nowrap;
}
.btn .arrow { transition: transform .3s var(--spring); display: inline-block; }
.btn:hover .arrow { transform: translateX(4px); }

.btn--primary {
  color: var(--white); background: var(--navy);
  box-shadow: 0 6px 18px rgba(20,40,68,.22);
}
.btn--primary:hover { background: var(--navy-light); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(20,40,68,.3); }

.btn--kraft {
  color: var(--navy); background: var(--kraft);
  box-shadow: 0 6px 18px rgba(200,169,110,.32);
}
.btn--kraft:hover { background: #d4b87a; transform: translateY(-2px); box-shadow: 0 12px 30px rgba(200,169,110,.45); }

.btn--ghost {
  color: var(--ink); background: transparent;
  padding: 12px 0;
  border-radius: 0;
  border-bottom: 1px solid var(--ink);
}
.btn--ghost:hover { color: var(--kraft-deep); border-bottom-color: var(--kraft-deep); }

.btn--outline {
  color: var(--white); background: transparent;
  border: 1px solid rgba(255,255,255,.25);
}
.btn--outline:hover { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.5); }

/* ──────── Cards ──────── */
.card {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  padding: clamp(1.5rem, 2.5vw, 2.25rem);
  position: relative;
  transition: transform var(--tx-base), box-shadow var(--tx-base), border-color var(--tx-fast);
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: var(--kraft);
  transform: scaleX(0); transform-origin: left;
  transition: transform .45s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(20,40,68,.08);
  border-color: var(--line);
}
.card:hover::before { transform: scaleX(1); }

.card.on-dark {
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(255,255,255,.08);
  color: rgba(255,255,255,.7);
}
.card.on-dark:hover {
  background: rgba(255,255,255,.06);
  border-color: rgba(200,169,110,.3);
  box-shadow: 0 18px 48px rgba(0,0,0,.3);
}
.card.on-dark::before { background: var(--kraft); }

.tag {
  display: inline-block;
  font-size: 10.5px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--kraft-deep);
  margin-bottom: .8rem;
}
.on-dark .tag, .card.on-dark .tag { color: var(--kraft); }

/* ──────── Reveal ──────── */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity .85s var(--ease), transform .85s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }
.reveal[data-stagger="1"] { transition-delay: .08s; }
.reveal[data-stagger="2"] { transition-delay: .16s; }
.reveal[data-stagger="3"] { transition-delay: .24s; }
.reveal[data-stagger="4"] { transition-delay: .32s; }
.reveal[data-stagger="5"] { transition-delay: .4s; }
.reveal[data-stagger="6"] { transition-delay: .48s; }

/* Stagger children */
.stagger > * {
  opacity: 0; transform: translateY(20px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.stagger.in > * { opacity: 1; transform: none; }
.stagger.in > *:nth-child(1) { transition-delay: .05s; }
.stagger.in > *:nth-child(2) { transition-delay: .12s; }
.stagger.in > *:nth-child(3) { transition-delay: .19s; }
.stagger.in > *:nth-child(4) { transition-delay: .26s; }
.stagger.in > *:nth-child(5) { transition-delay: .33s; }
.stagger.in > *:nth-child(6) { transition-delay: .4s; }
.stagger.in > *:nth-child(7) { transition-delay: .47s; }
.stagger.in > *:nth-child(8) { transition-delay: .54s; }

/* ──────── Marquee ──────── */
.marquee {
  display: flex; overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex; gap: 3rem; align-items: center;
  animation: marquee 32s linear infinite;
  white-space: nowrap;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.marquee:hover .marquee-track { animation-play-state: paused; }

/* ──────── Footer ──────── */
footer.site-footer {
  background: var(--navy-deep);
  color: rgba(255,255,255,.5);
  font-size: 14px;
}
.footer-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-stat {
  padding: 2rem 1.5rem;
  text-align: center;
  border-right: 1px solid rgba(255,255,255,.06);
}
.footer-stat:last-child { border-right: none; }
.footer-stat-n {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.5vw, 2.6rem);
  color: var(--kraft);
  letter-spacing: -.03em; line-height: 1;
}
.footer-stat-l {
  font-size: 12px; font-weight: 300;
  color: rgba(255,255,255,.45);
  margin-top: .4rem; line-height: 1.45;
}
.footer-bottom {
  padding: 1.75rem var(--pad-x);
  display: flex; align-items: center;
  justify-content: space-between; gap: 1rem;
  flex-wrap: wrap;
}
.footer-bottom .nav-logo .wordmark { color: var(--white); font-size: 16px; }
.footer-bottom .nav-logo .wordmark em { color: var(--kraft); }
.footer-copy { font-size: 12px; color: rgba(255,255,255,.3); }
.footer-links { display: flex; gap: 1.75rem; list-style: none; }
.footer-links a {
  font-size: 12.5px; color: rgba(255,255,255,.45);
  text-decoration: none; cursor: pointer;
  transition: color var(--tx-fast);
}
.footer-links a:hover { color: var(--kraft); }

/* ──────── Modals ──────── */
.modal-overlay {
  display: none;
  position: fixed; inset: 0; z-index: 999;
  background: rgba(13,30,54,.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  align-items: flex-end; justify-content: center;
}
.modal-overlay.open { display: flex; animation: fade-in .25s ease; }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.modal-panel {
  background: var(--white);
  width: 100%; max-width: 760px; max-height: 88vh;
  border-radius: 22px 22px 0 0;
  overflow-y: auto;
  padding: 2.5rem clamp(1.5rem, 4vw, 3.5rem) 3rem;
  position: relative;
  animation: modal-up .4s var(--ease);
}
@keyframes modal-up { from { transform: translateY(50px); opacity: 0; } to { transform: none; opacity: 1; } }
.modal-close {
  position: absolute; top: 1rem; right: 1.25rem;
  width: 36px; height: 36px; border: none; cursor: pointer;
  background: var(--paper-warm); color: var(--ink-muted);
  border-radius: 50%; font-size: 18px;
  display: grid; place-items: center;
  transition: background var(--tx-fast), color var(--tx-fast);
}
.modal-close:hover { background: var(--ink); color: var(--white); }
.modal-title {
  font-family: var(--serif);
  font-size: 1.8rem; letter-spacing: -.025em;
  margin-bottom: 2rem; padding-right: 2rem;
}
.modal-label {
  font-size: 11px; font-weight: 500; letter-spacing: .14em;
  text-transform: uppercase; color: var(--kraft-deep);
  margin-top: 1.75rem; margin-bottom: .55rem;
}
.modal-label:first-of-type { margin-top: 0; }
.modal-text { font-size: 14.5px; font-weight: 300; color: var(--ink-muted); line-height: 1.75; }
.modal-text a { color: var(--navy); text-decoration: underline; text-underline-offset: 3px; }
.modal-table { width: 100%; font-size: 13px; font-weight: 300; border-collapse: collapse; margin-top: .7rem; }
.modal-table th { text-align: left; padding: 8px 12px 8px 0; font-weight: 500; color: var(--ink); border-bottom: 1px solid var(--line); }
.modal-table td { padding: 8px 12px 8px 0; color: var(--ink-muted); border-bottom: 1px solid var(--line-soft); vertical-align: top; }

/* ──────── Utility ──────── */
.nb { white-space: nowrap; }

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  margin: 0 var(--pad-x);
}

/* ──────── Letter-by-letter split animation ──────── */
[data-split] .word {
  display: inline-block;
  white-space: nowrap;
}
[data-split] .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(.4em);
  filter: blur(6px);
  animation: char-in .85s var(--ease) forwards;
  animation-delay: calc(var(--i) * 22ms + 260ms);
  will-change: transform, opacity, filter;
}
@keyframes char-in {
  to { opacity: 1; transform: none; filter: blur(0); }
}

/* ──────── Contact form ──────── */
.contact-form {
  max-width: 580px;
  margin: 0 auto;
  text-align: left;
  display: grid;
  gap: .9rem;
}
.contact-form .row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .9rem;
}
.contact-form .field {
  position: relative;
  display: flex;
  flex-direction: column;
}
.contact-form label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: .4rem;
}
.contact-form .on-dark label { color: rgba(255,255,255,.5); }
.contact-form input,
.contact-form textarea {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 300;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  line-height: 1.5;
  transition: border-color var(--tx-fast), box-shadow var(--tx-fast), background var(--tx-fast);
  -webkit-appearance: none;
  appearance: none;
}
.contact-form textarea {
  min-height: 120px;
  resize: vertical;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--ink-soft);
  font-weight: 300;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--kraft);
  box-shadow: 0 0 0 3px var(--kraft-pale);
}
.contact-form .form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: .5rem;
}
.contact-form .form-actions .fallback {
  font-size: 13px;
  color: var(--ink-muted);
}
.contact-form .form-actions .fallback a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--kraft);
}
.contact-form .form-status {
  font-size: 13px;
  min-height: 18px;
  color: var(--ink-muted);
  text-align: center;
  margin-top: .25rem;
}
.contact-form .form-status[data-tone="ok"] { color: var(--kraft-deep); }
.contact-form .form-status[data-tone="err"] { color: #b3502d; }

/* On-dark variant for filière page CTA */
.contact-form.on-dark input,
.contact-form.on-dark textarea {
  background: rgba(255,255,255,.04);
  border-color: rgba(255,255,255,.14);
  color: var(--white);
}
.contact-form.on-dark input::placeholder,
.contact-form.on-dark textarea::placeholder { color: rgba(255,255,255,.4); }
.contact-form.on-dark input:focus,
.contact-form.on-dark textarea:focus {
  background: rgba(255,255,255,.07);
  border-color: var(--kraft);
  box-shadow: 0 0 0 3px var(--kraft-glow);
}
.contact-form.on-dark .form-actions .fallback { color: rgba(255,255,255,.55); }
.contact-form.on-dark .form-actions .fallback a { color: var(--white); }
.contact-form.on-dark .form-status { color: rgba(255,255,255,.55); }
.contact-form.on-dark .form-status[data-tone="ok"] { color: var(--kraft); }

/* ──────── Responsive ──────── */
@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.is-open {
    display: flex; position: absolute;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--white);
    padding: 1rem var(--pad-x) 1.5rem;
    border-bottom: 1px solid var(--line);
  }
  .nav-links.is-open li { width: 100%; }
  .nav-links.is-open a {
    display: block; padding: .9rem 0;
    border-bottom: 1px solid var(--line-soft);
  }
  .nav-links.is-open a::after { display: none; }
  .nav-links.is-open .nav-cta {
    margin-top: .75rem; text-align: center;
    padding: 12px 18px !important;
  }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: 1rem 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}