/* ==========================================================
   ADEMIS — feuille de style principale
   ========================================================== */

:root {
  --navy: #1b2a52;
  --navy-dark: #131e3d;
  --grey-text: #5d6578;
  --grey-line: #e7e9ee;
  --grey-panel: #e3e6eb;
  --white: #ffffff;
  --container: 1280px;
  --gutter: clamp(24px, 5vw, 72px);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  color: var(--navy);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

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

/* Faint vertical grid-guide lines across the page, echoing the reference design */
.grid-guides {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: repeating-linear-gradient(
    to right,
    transparent 0,
    transparent calc(var(--gutter) - 1px),
    var(--grey-line) calc(var(--gutter) - 1px),
    var(--grey-line) var(--gutter)
  );
  background-position: center top;
  background-repeat: repeat-x;
}

/* ---------------- Header / Nav ---------------- */

.site-header {
  position: relative;
  z-index: 2;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px var(--gutter) 24px;
}

.logo img {
  height: 28px;
  width: auto;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-link {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--navy);
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}

.nav-link.is-active,
.nav-link:hover {
  border-bottom-color: var(--navy);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 15px 26px;
  background: var(--navy);
  color: var(--white);
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: var(--navy-dark);
  transform: translateY(-1px);
}

/* Header underline bar: bold navy segment + thin grey line spanning the rest */
.header-rule {
  position: relative;
  width: 100%;
  height: 1px;
  background: var(--grey-line);
}

.header-rule::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 32%;
  min-width: 260px;
  height: 3px;
  background: var(--navy);
  transform: translateY(-1px);
}

/* ---------------- Hero (Home) ---------------- */

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  align-items: stretch;
  min-height: 82vh;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 64px var(--gutter) 64px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey-text);
  margin-bottom: 28px;
}

.headline {
  font-size: clamp(2.6rem, 5.4vw, 4.6rem);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 32px;
  text-transform: uppercase;
  color: var(--navy);
}

.lead {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--grey-text);
  max-width: 46ch;
  margin: 0 0 40px;
}

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

/* Abstract layered-glass illustration, CSS-only */
.glass-stack {
  position: relative;
  width: 320px;
  height: 320px;
  transform-style: preserve-3d;
  perspective: 900px;
}

.glass-stack .shard {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 190px;
  height: 260px;
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-dark) 100%);
  clip-path: polygon(50% 0%, 100% 38%, 78% 100%, 22% 92%);
  transform: translate(-50%, -50%) rotate(-8deg);
  box-shadow: 0 30px 60px rgba(19, 30, 61, 0.35);
  z-index: 3;
}

.plate {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 300px;
  height: 34px;
  border: 1px solid rgba(27, 42, 82, 0.25);
  transform-origin: center;
}

.plate.solid { background: var(--navy); box-shadow: 0 14px 24px rgba(19,30,61,0.25); }
.plate.glass { background: rgba(255,255,255,0.55); backdrop-filter: blur(1px); }
.plate.glass-dark { background: rgba(27,42,82,0.14); }

.plate.p1 { transform: translate(-50%, -170px) rotate(-8deg) skewX(-18deg); z-index: 1; }
.plate.p2 { transform: translate(-50%, -120px) rotate(-8deg) skewX(-18deg); z-index: 5; }
.plate.p3 { transform: translate(-50%, -70px)  rotate(-8deg) skewX(-18deg); z-index: 1; }
.plate.p4 { transform: translate(-50%, -20px)  rotate(-8deg) skewX(-18deg); z-index: 5; }
.plate.p5 { transform: translate(-50%, 30px)   rotate(-8deg) skewX(-18deg); z-index: 1; }
.plate.p6 { transform: translate(-50%, 80px)   rotate(-8deg) skewX(-18deg); z-index: 5; }
.plate.p7 { transform: translate(-50%, 130px)  rotate(-8deg) skewX(-18deg); z-index: 1; }

/* ---------------- Contact page ---------------- */

.page-header {
  padding: 70px var(--gutter) 0;
  position: relative;
  z-index: 1;
}

.page-header .eyebrow { margin-bottom: 24px; }

.page-title {
  font-size: clamp(2.4rem, 6vw, 5rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin: 0 0 56px;
}

.mark {
  width: 140px;
  height: 34px;
  margin-bottom: 48px;
}

.mark span {
  display: block;
  height: 3px;
  background: var(--navy);
  margin-bottom: 6px;
}
.mark span:nth-child(1) { width: 100%; }
.mark span:nth-child(2) { width: 70%; }
.mark span:nth-child(3) { width: 40%; }

.contact-block {
  padding: 0 var(--gutter) 140px;
  position: relative;
  z-index: 1;
}

.email-link {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: clamp(1.8rem, 4.4vw, 3.2rem);
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 28px;
}

.email-link svg { width: 0.6em; height: 0.6em; flex-shrink: 0; }

.location-line {
  font-size: 1.05rem;
  color: var(--grey-text);
}

/* ---------------- Footer ---------------- */

.site-footer {
  border-top: 1px solid var(--grey-line);
  padding: 28px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--grey-text);
  letter-spacing: 0.06em;
}

/* ---------------- Responsive ---------------- */

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .hero-visual { min-height: 320px; }
  .nav-right { gap: 18px; }
  .nav-link { display: none; }
}

@media (max-width: 560px) {
  .nav { padding: 20px var(--gutter) 18px; }
  .btn { padding: 12px 18px; font-size: 12px; }
  .hero-content { padding-top: 44px; padding-bottom: 44px; }
}