/* ==========================================================================
   HB Creation Lab — feuille de style principale
   Palette : noir profond + argent / platine (finition "inox brossé")
   ========================================================================== */

:root {
  --c-black: #0a0a0b;
  --c-black-alt: #131315;
  --c-black-soft: #1a1a1d;
  --c-text: #f2f2f0;
  --c-text-muted: #a7a7ac;
  --c-platinum: #e5e4e2;
  --c-silver: #c7c8ca;
  --c-stainless: #9a9ba0;
  --c-line: rgba(255, 255, 255, 0.09);
  --c-line-strong: rgba(255, 255, 255, 0.18);
  --gradient-metal: linear-gradient(135deg, #d8d8d6 0%, #f5f5f4 25%, #b8b9bb 55%, #eceded 75%, #9a9ba0 100%);
  --gradient-metal-soft: linear-gradient(160deg, rgba(229,228,226,0.14), rgba(154,155,160,0.03));
  --radius-s: 4px;
  --radius-m: 8px;
  --container: 1180px;
  --font-heading: "Poppins", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, select, textarea { font: inherit; }

body {
  background: var(--c-black);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-platinum);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--c-stainless);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gradient-metal);
}

section { padding: 96px 0; }
.section-alt { background: var(--c-black-alt); }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
.section-head p { color: var(--c-text-muted); margin-top: 14px; font-size: 1.02rem; }
.section-head.center { max-width: 680px; margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow::before { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-s);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), opacity .3s var(--ease);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient-metal);
  color: var(--c-black);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(229,228,226,0.18); }
.btn-outline {
  border-color: var(--c-line-strong);
  color: var(--c-text);
  background: transparent;
}
.btn-outline:hover { border-color: var(--c-silver); background: rgba(255,255,255,0.04); }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-line);
  transition: border-color .3s var(--ease);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--c-platinum);
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}
.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-s);
  background: var(--gradient-metal);
  color: var(--c-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0;
}
.logo span { color: var(--c-text-muted); font-weight: 400; font-size: 0.85rem; display: block; }

.main-nav { display: flex; align-items: center; gap: 40px; }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: 0.92rem;
  color: var(--c-text-muted);
  position: relative;
  padding: 6px 0;
  transition: color .25s var(--ease);
}
.nav-links a:hover, .nav-links a.active { color: var(--c-text); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--gradient-metal);
}
.nav-cta { display: flex; align-items: center; gap: 22px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--c-platinum); transition: transform .3s var(--ease), opacity .3s var(--ease); }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 140px 0 110px;
  overflow: hidden;
  border-bottom: 1px solid var(--c-line);
}
.hero::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto -10%;
  height: 620px;
  background: radial-gradient(ellipse at 50% 0%, rgba(229,228,226,0.10), transparent 65%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  position: relative;
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.08;
}
.hero h1 .metal {
  background: var(--gradient-metal);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead {
  margin-top: 24px;
  color: var(--c-text-muted);
  font-size: 1.08rem;
  max-width: 480px;
}
.hero-actions { display: flex; gap: 16px; margin-top: 40px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 64px; }
.hero-stats div strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--c-platinum);
}
.hero-stats div span { font-size: 0.82rem; color: var(--c-text-muted); }

.hero-visual {
  position: relative;
  aspect-ratio: 1/1;
  border-radius: var(--radius-m);
  border: 1px solid var(--c-line-strong);
  background:
    linear-gradient(160deg, rgba(229,228,226,0.06), transparent 60%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.035) 0 2px, transparent 2px 14px),
    var(--c-black-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual svg { width: 58%; height: 58%; color: var(--c-silver); }
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-s);
}

/* ---------- Cards génériques ---------- */
.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 {
  background: var(--c-black-alt);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  padding: 36px 30px;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.card:hover { border-color: var(--c-line-strong); transform: translateY(-4px); }
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-s);
  border: 1px solid var(--c-line-strong);
  background: var(--gradient-metal-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.card-icon svg { width: 26px; height: 26px; color: var(--c-platinum); }
.card h3 { font-size: 1.15rem; margin-bottom: 12px; }
.card p { color: var(--c-text-muted); font-size: 0.95rem; }
.card .card-tags { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-stainless);
  border: 1px solid var(--c-line-strong);
  border-radius: 999px;
  padding: 5px 12px;
}

/* ---------- Section "Vous êtes..." ---------- */
.audience-split { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.audience-card {
  position: relative;
  padding: 48px 36px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, var(--c-black-alt), var(--c-black-soft));
  overflow: hidden;
}
.audience-card::before {
  content: "";
  position: absolute;
  top: -60px; right: -60px;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(229,228,226,0.12), transparent 70%);
}
.audience-card h3 { font-size: 1.4rem; margin-bottom: 14px; }
.audience-card p { color: var(--c-text-muted); margin-bottom: 26px; }
.audience-card ul { margin-bottom: 30px; }
.audience-card ul li {
  padding-left: 20px;
  position: relative;
  font-size: 0.92rem;
  color: var(--c-text);
  margin-bottom: 10px;
}
.audience-card ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 8px; height: 1px;
  background: var(--gradient-metal);
}

/* ---------- Portfolio ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 44px; }
.filter-btn {
  padding: 10px 20px;
  border: 1px solid var(--c-line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--c-text-muted);
  font-size: 0.85rem;
  transition: all .25s var(--ease);
}
.filter-btn:hover { color: var(--c-text); }
.filter-btn.is-active { background: var(--gradient-metal); color: var(--c-black); border-color: transparent; font-weight: 600; }

.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.project-card {
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--c-black-alt);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}
.project-card:hover { transform: translateY(-4px); border-color: var(--c-line-strong); }
.project-visual {
  aspect-ratio: 4/3;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(145deg, rgba(229,228,226,0.10), transparent 55%),
    repeating-linear-gradient(120deg, rgba(255,255,255,0.03) 0 3px, transparent 3px 18px),
    var(--c-black-soft);
  border-bottom: 1px solid var(--c-line);
}
.project-visual svg { width: 40%; height: 40%; color: var(--c-stainless); opacity: 0.9; }
.project-body { padding: 24px; }
.project-body .tag { margin-bottom: 14px; display: inline-block; }
.project-body h3 { font-size: 1.05rem; margin-bottom: 8px; }
.project-body p { font-size: 0.88rem; color: var(--c-text-muted); }
.project-card[hidden] { display: none; }

/* ---------- Process / Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { position: relative; padding-top: 8px; border-top: 1px solid var(--c-line-strong); }
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--c-stainless);
  display: block;
  margin-bottom: 18px;
}
.step h3 { font-size: 1.05rem; margin-bottom: 10px; }
.step p { font-size: 0.9rem; color: var(--c-text-muted); }

/* ---------- CTA banner ---------- */
.cta-banner {
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-m);
  padding: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  background: linear-gradient(135deg, var(--c-black-soft), var(--c-black-alt));
  flex-wrap: wrap;
}
.cta-banner h2 { font-size: 1.8rem; max-width: 460px; }
.cta-banner p { color: var(--c-text-muted); margin-top: 10px; max-width: 420px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--c-line); padding: 72px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 56px; }
.footer-brand p { color: var(--c-text-muted); margin-top: 16px; font-size: 0.9rem; max-width: 280px; }
.footer-col h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--c-stainless); margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col a { font-size: 0.9rem; color: var(--c-text-muted); transition: color .2s var(--ease); }
.footer-col a:hover { color: var(--c-text); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  border-top: 1px solid var(--c-line);
  font-size: 0.8rem;
  color: var(--c-text-muted);
  flex-wrap: wrap;
  gap: 12px;
}
.socials { display: flex; gap: 16px; }
.socials a {
  width: 34px; height: 34px;
  border: 1px solid var(--c-line-strong);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.socials svg { width: 15px; height: 15px; color: var(--c-text-muted); }
.socials a:hover svg { color: var(--c-platinum); }

/* ---------- Page header (pages internes) ---------- */
.page-header { padding: 64px 0 48px; border-bottom: 1px solid var(--c-line); }
.page-header h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
.page-header p { color: var(--c-text-muted); margin-top: 16px; max-width: 620px; }
.breadcrumb { font-size: 0.8rem; color: var(--c-text-muted); margin-bottom: 18px; }
.breadcrumb a:hover { color: var(--c-text); }

/* ---------- Page contact ---------- */
.contact-simple { max-width: 720px; margin: 0 auto; }
.contact-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }
.form-note { font-size: 0.78rem; color: var(--c-text-muted); margin-top: 14px; }

.info-list { margin-bottom: 40px; }
.info-list li { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--c-line); }
.info-list li:first-child { padding-top: 0; }
.info-list .info-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-s);
  display: flex; align-items: center; justify-content: center;
}
.info-list .info-icon svg { width: 18px; height: 18px; color: var(--c-platinum); }
.info-list strong { display: block; margin-bottom: 4px; font-size: 0.95rem; }
.info-list span { font-size: 0.88rem; color: var(--c-text-muted); }

/* ---------- Reveal on scroll ---------- */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 404 ---------- */
.error-page { min-height: 70vh; display: flex; align-items: center; }
.error-page .code {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 12vw, 8rem);
  background: var(--gradient-metal);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  line-height: 1;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 420px; margin: 0 auto; }
  .grid-3, .grid-2, .project-grid, .audience-split, .footer-grid, .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  section { padding: 64px 0; }
  .nav-links, .nav-cta .btn-outline { display: none; }
  .nav-toggle { display: flex; }
  .main-nav.is-open .nav-links {
    display: flex;
    position: absolute;
    top: 84px; left: 0; right: 0;
    background: var(--c-black);
    border-bottom: 1px solid var(--c-line);
    flex-direction: column;
    gap: 0;
    padding: 12px 24px 24px;
  }
  .main-nav.is-open .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--c-line); }
  .grid-3, .grid-2, .project-grid, .audience-split, .footer-grid, .steps { grid-template-columns: 1fr; }
  .cta-banner { flex-direction: column; align-items: flex-start; padding: 40px 28px; }
  .hero-stats { gap: 28px; flex-wrap: wrap; }
}