/* RESET */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "Segoe UI", sans-serif;
  background: #000;
  color: #e0f7ff;
}

/* HEADER */
.site-header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  padding: 1rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 20;
  background: linear-gradient(to bottom, rgba(0,0,0,0.7), transparent);
}
.logo-top {
  font-size: 1.2rem;
  letter-spacing: 0.2em;
  font-weight: 600;
}
.main-nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
.main-nav a {
  color: #e0f7ff;
  text-decoration: none;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  position: relative;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -3px;
  width: 0; height: 1px;
  background: #00ffff;
  transition: width 0.3s;
}
.main-nav a:hover::after { width: 100%; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  margin-bottom: 4px;
}

/* HERO */
.hero {
  height: 100vh;
  background-image: url("pyramide.jpg"); /* remplace par ton image */
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  text-shadow: 0 0 8px rgba(0, 255, 255, 0.3);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom right, rgba(0,0,0,0.4), rgba(0,0,0,0.8));
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem;
  animation: fadeIn 2s ease-out;
}
.hero-logo {
  font-size: 2.8rem;
  letter-spacing: 0.3em;
  margin-bottom: 1rem;
  border: 1px solid rgba(0,255,255,0.4);
  padding: 0.5rem 1.5rem;
  display: inline-block;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(4px);
}
.hero-quote {
  font-size: 1.5rem;
  font-weight: 300;
  line-height: 1.4;
  background: rgba(0,0,0,0.4);
  padding: 1rem 2rem;
  display: inline-block;
  border-left: 3px solid #00ffff;
}

/* PULSATION BLEUE */
.pulse-core {
  width: 20px;
  height: 20px;
  margin: 2rem auto 0;
  border-radius: 50%;
  background: #00ffff;
  box-shadow: 0 0 12px #00ffff;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.6; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* GRID SYSTEM */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}
[class^="col-"] { flex: 1; }
.col-6 { flex-basis: calc(50% - 2rem); }
.col-12 { flex-basis: 100%; }
.tab-12, .mob-12 { flex-basis: 100%; }

/* INTRO SECTION */
.intro-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}
.intro-section p {
  font-size: 1.1rem;
  line-height: 1.6;
}
.intro-image {
  width: 100%;
  height: 300px;
  background: url("pyramide.jpg") center/cover;
  border: 1px solid rgba(255,255,255,0.2);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .tab-12 { flex-basis: 100%; }
}
@media (max-width: 768px) {
  .mob-12 { flex-basis: 100%; }
  .main-nav ul {
    position: fixed;
    top: 70px; right: 0;
    background: rgba(0,0,0,0.95);
    flex-direction: column;
    padding: 2rem;
    transform: translateX(100%);
    transition: 0.3s;
    z-index: 100;
  }
  .main-nav ul.is-open { transform: translateX(0); }
  .nav-toggle { display: block; }
}
.archi-footer {
  background: #0a0a0a;
  color: #ccc;
  padding: 40px 20px;
  font-family: "Inter", sans-serif;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: auto;
}

.footer-left {
  max-width: 400px;
}

.footer-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 5px;
}

.footer-quote {
  font-size: 0.9rem;
  opacity: 0.7;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  color: #ccc;
  text-decoration: none;
  transition: 0.2s;
}

.footer-links a:hover {
  color: #fff;
  text-shadow: 0 0 6px #4af;
}

.footer-bottom {
  text-align: center;
  margin-top: 30px;
  font-size: 0.8rem;
  opacity: 0.6;
}