/* ─────────────────────────────────────────────
   COMMUN.CSS — Ghabe Engineering Demo
   Design system, navbar, footer, shared components
   ───────────────────────────────────────────── */

/* ── Variables ── */
:root {
  --fond: #FFFFFF;
  --fond-card: #F7F4EF;
  --fond-hover: #EFE9DF;
  --accent: #B08D5C;
  --accent-hover: #93724A;
  --accent-pale: rgba(176, 141, 92, 0.10);
  --accent-glow: rgba(176, 141, 92, 0.22);
  --texte: #1C1B19;
  --texte-dim: #6B6660;
  --texte-on-accent: #FFFFFF;
  --border: rgba(176, 141, 92, 0.28);
  --border-subtle: rgba(28, 27, 25, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --max-w: 1200px;
  --section-py: 100px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Space Grotesk', sans-serif;
  background: var(--fond);
  color: var(--texte);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
ul { list-style: none; }
button { font-family: inherit; }

/* ── Layout ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Section Header ── */
.section-tag {
  display: inline-block;
  font-family: 'Space Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.section-header {
  margin-bottom: 56px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--texte);
}
.section-header p {
  margin-top: 16px;
  font-size: 1.05rem;
  color: var(--texte-dim);
  max-width: 560px;
  line-height: 1.75;
}

/* ── Buttons ── */
.btn-primary {
  position: relative;
  overflow: hidden;
  display: inline-block;
  background: var(--accent);
  color: var(--texte-on-accent);
  text-decoration: none;
  padding: 15px 32px;
  border-radius: var(--radius-sm);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
.btn-primary::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shine 3s infinite 1.5s;
}
@keyframes shine {
  0% { left: -100%; }
  100% { left: 200%; }
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}
.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
  text-decoration: none;
  padding: 14px 31px;
  border-radius: var(--radius-sm);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.btn-secondary:hover {
  background: var(--accent-pale);
  transform: translateY(-2px);
}

/* ── Reveal Animation ── */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  transition: padding 0.3s, box-shadow 0.3s;
}
.navbar.scrolled {
  padding: 13px 0;
  box-shadow: 0 4px 24px rgba(28, 27, 25, 0.07);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  text-decoration: none;
  display: flex;
  flex-direction: column;
  line-height: 1;
  gap: 3px;
}
.logo-main {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.14em;
  color: var(--accent);
}
.logo-sub {
  font-family: 'Space Mono', monospace;
  font-size: 0.52rem;
  letter-spacing: 0.28em;
  color: var(--texte-dim);
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--texte-dim);
  text-decoration: none;
  transition: color 0.2s;
  letter-spacing: 0.01em;
}
.nav-link:hover, .nav-link.active {
  color: var(--texte);
}
.nav-cta {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--texte-on-accent);
  background: var(--accent);
  text-decoration: none;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  transition: background 0.2s, transform 0.2s;
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 101;
  position: relative;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--texte);
  border-radius: 2px;
  transition: transform 0.28s, opacity 0.28s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--fond);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 36px;
    z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-link { font-size: 1.4rem; }
  .nav-cta { font-size: 1.1rem; padding: 14px 28px; }
}

/* ── Footer ── */
.footer {
  background: var(--fond-card);
  border-top: 1px solid var(--border-subtle);
  padding: 72px 0 32px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}
.footer-brand .nav-logo { margin-bottom: 20px; }
.footer-brand p {
  font-size: 0.9rem;
  color: var(--texte-dim);
  line-height: 1.75;
  margin-bottom: 8px;
  max-width: 320px;
}
.footer-nav h4, .footer-contact h4 {
  font-size: 0.72rem;
  font-family: 'Space Mono', monospace;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.footer-nav ul { display: flex; flex-direction: column; gap: 12px; }
.footer-nav a {
  font-size: 0.9rem;
  color: var(--texte-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--texte); }
.footer-contact p {
  font-size: 0.9rem;
  color: var(--texte-dim);
  margin-bottom: 10px;
  line-height: 1.6;
}
.footer-contact a {
  color: var(--texte-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-contact a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 0.82rem;
  color: var(--texte-dim);
}
.footer-credit a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
.footer-credit a:hover { text-decoration: underline; }

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}