/* ============================================================
   SSIEE - Services — Design system
   Palette : navy (identité), acier (secondaire), rouge (accent rare)
   Display : Space Grotesk | Corps : Inter | Dossiers/refs : IBM Plex Mono
   ============================================================ */

:root {
  --navy-950: #0a1626;
  --navy-900: #10233f;
  --navy-800: #16304f;
  --navy-700: #1f4066;
  --steel-500: #3f6c9e;
  --steel-300: #7f9cbf;
  --red-600: #c62839;
  --red-700: #a91f2e;
  --paper-0: #ffffff;
  --paper-50: #f6f8fb;
  --paper-100: #eef1f6;
  --line-200: #dde3ec;
  --ink-900: #121b28;
  --ink-600: #4c5a6e;
  --ink-400: #7c8aa0;

  --font-display: "Space Grotesk", "Noto Sans SC", "Arial Narrow", sans-serif;
  --font-body: "Inter", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Noto Sans SC", "Courier New", monospace;

  --radius: 3px;
  --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink-900);
  background: var(--paper-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--navy-950);
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.1rem, 4vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; color: var(--ink-600); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* -------- Eyebrow / dossier tags (mono) -------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--steel-500);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--red-600);
  display: inline-block;
}

/* -------- Header / nav -------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-200);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--navy-950);
}
.brand img { height: 42px; width: auto; }
.brand .tagline {
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--ink-400);
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  gap: 6px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  padding: 8px 14px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-600);
  border-radius: var(--radius);
  transition: color 0.15s ease, background 0.15s ease;
}
.nav-links a:hover { color: var(--navy-950); background: var(--paper-100); }
.nav-links a.current {
  color: var(--navy-950);
  font-weight: 700;
  box-shadow: inset 0 -3px 0 var(--red-600);
}
.nav-cta {
  background: var(--navy-950) !important;
  color: #fff !important;
  padding: 9px 18px !important;
}
.nav-cta:hover { background: var(--navy-800) !important; }
.nav-cta.current {
  background: var(--red-700) !important;
  box-shadow: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-200);
  border-radius: var(--radius);
  padding: 8px 10px;
  cursor: pointer;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after { display: none; }
.nav-toggle-icon { width: 20px; height: 2px; background: var(--navy-950); display: block; position: relative; }
.nav-toggle-icon::before, .nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--navy-950);
}
.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { top: 6px; }

.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 10px;
  padding-left: 14px;
  border-left: 1px solid var(--line-200);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}
.lang-switch a, .lang-switch span {
  padding: 4px 6px;
  color: var(--ink-400);
  border-radius: 2px;
}
.lang-switch a:hover { color: var(--navy-950); background: var(--paper-100); }
.lang-switch .active { color: var(--navy-950); font-weight: 600; }
@media (max-width: 640px) {
  .lang-switch { border-left: none; margin: 12px 0 0; padding-left: 0; }
}

/* -------- Buttons -------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background: var(--navy-950); color: #fff; }
.btn-primary:hover { background: var(--navy-800); }
.btn-outline { border-color: var(--navy-950); color: var(--navy-950); }
.btn-outline:hover { background: var(--navy-950); color: #fff; }
.btn-red { background: var(--red-600); color: #fff; }
.btn-red:hover { background: var(--red-700); }

/* -------- Hero -------- */
.hero {
  padding: 96px 0 72px;
  background:
    radial-gradient(1100px 420px at 82% -10%, rgba(63, 108, 158, 0.14), transparent 60%),
    var(--paper-0);
  border-bottom: 1px solid var(--line-200);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.hero h1 { margin-bottom: 20px; }
.hero .lead { font-size: 1.12rem; max-width: 46ch; }
.hero-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }

.dossier-card {
  border: 1px solid var(--line-200);
  border-radius: var(--radius);
  background: var(--paper-50);
  padding: 4px;
}
.dossier-card .dossier-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line-200);
}
.dossier-card .dossier-row:last-child { border-bottom: none; }
.dossier-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--red-600);
  white-space: nowrap;
}
.dossier-row strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.98rem;
  color: var(--navy-950);
}
.dossier-row span { font-size: 0.85rem; color: var(--ink-400); }

/* -------- Sections -------- */
section { padding: 76px 0; }
.section-alt { background: var(--paper-50); border-top: 1px solid var(--line-200); border-bottom: 1px solid var(--line-200); }
.section-head { max-width: 62ch; margin-bottom: 44px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

.card {
  border: 1px solid var(--line-200);
  border-radius: var(--radius);
  padding: 30px 26px;
  background: #fff;
}
.card .num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--steel-500);
  display: block;
  margin-bottom: 12px;
}
.card ul { margin: 14px 0 0; padding-left: 18px; color: var(--ink-600); font-size: 0.92rem; }
.card li { margin-bottom: 6px; }

/* -------- Timeline (parcours réglementaire réel) -------- */
.timeline { position: relative; margin-top: 40px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--line-200);
}
.tl-item { position: relative; padding-left: 46px; margin-bottom: 34px; }
.tl-item:last-child { margin-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--red-600);
}
.tl-item .tl-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--steel-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.tl-item h3 { margin: 4px 0 6px; }

/* -------- Logos / références -------- */
.logo-note {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-400);
  margin-bottom: 28px;
}
.logo-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--line-200);
  border: 1px solid var(--line-200);
}
.logo-grid a, .logo-grid div {
  background: #fff;
  aspect-ratio: 3 / 2;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  filter: grayscale(1);
  opacity: 0.75;
  transition: opacity 0.15s ease, filter 0.15s ease;
}
.logo-grid a:hover, .logo-grid div:hover { filter: grayscale(0); opacity: 1; }
.logo-grid img { max-height: 34px; width: auto; }

/* -------- Stats strip -------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.stat .n { font-family: var(--font-display); font-size: 2.2rem; color: var(--navy-950); font-weight: 700; display: block; }
.stat .l { font-size: 0.85rem; color: var(--ink-400); display: block; margin-top: 6px; }

/* -------- CTA band -------- */
.cta-band {
  background: var(--navy-950);
  color: #fff;
  padding: 64px 0;
  border-radius: var(--radius);
}
.cta-band h2 { color: #fff; }
.cta-band p { color: var(--steel-300); }
.cta-band .container { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }

/* -------- Forms -------- */
.form-grid { display: grid; gap: 18px; max-width: 640px; }
label { font-size: 0.85rem; font-weight: 600; color: var(--navy-950); display: block; margin-bottom: 6px; }
input, textarea, select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line-200);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--paper-50);
}
input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--steel-500);
  outline-offset: 1px;
  background: #fff;
}
textarea { min-height: 140px; resize: vertical; }
.form-note { font-size: 0.82rem; color: var(--ink-400); }

/* -------- Contact info blocks -------- */
.info-block { border-left: 2px solid var(--red-600); padding-left: 18px; margin-bottom: 22px; }
.info-block .k { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--steel-500); }
.info-block .v { font-size: 1rem; color: var(--navy-950); font-weight: 600; }

/* -------- Legal pages -------- */
.legal { max-width: 76ch; }
.legal h2 { margin-top: 2em; font-size: 1.15rem; }
.legal table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: 0.92rem; }
.legal td { padding: 9px 12px; border: 1px solid var(--line-200); vertical-align: top; }
.legal td:first-child { width: 34%; color: var(--ink-400); font-family: var(--font-mono); font-size: 0.8rem; }

/* -------- Footer -------- */
.site-footer {
  background: var(--navy-950);
  color: var(--steel-300);
  padding: 52px 0 28px;
  margin-top: 40px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
.site-footer h4 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; font-family: var(--font-mono); font-weight: 500; margin-bottom: 14px; }
.site-footer a { color: var(--steel-300); font-size: 0.9rem; }
.site-footer a:hover { color: #fff; }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.footer-bottom {
  border-top: 1px solid var(--navy-800);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--steel-300);
}
.footer-bottom .fmono { font-family: var(--font-mono); color: var(--ink-400); }

/* -------- Responsive -------- */
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-2, .stats, .footer-grid { grid-template-columns: 1fr 1fr; }
  .logo-grid { grid-template-columns: repeat(3, 1fr); }
  .cta-band .container { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line-200);
    padding: 12px 24px 20px;
    gap: 2px;
  }
  .nav-toggle { display: block; }
  .grid-3, .grid-2, .stats, .footer-grid { grid-template-columns: 1fr; }
  .logo-grid { grid-template-columns: repeat(2, 1fr); }
  section { padding: 56px 0; }
  .hero { padding: 64px 0 48px; }
}