* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #0A0A1A;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: #6C63FF;
  color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #0A0A1A;
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(#6C63FF, #00D9FF);
  border-radius: 10px;
}

/* Canvas hero */
#hero-canvas {
  display: block;
}

/* Navbar scroll */
#navbar.scrolled {
  background: rgba(10, 10, 26, 0.85);
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Burger actif */
#burger.active .burger-line:nth-child(1) {
  transform: rotate(45deg) translateY(8px);
}
#burger.active .burger-line:nth-child(2) {
  opacity: 0;
}
#burger.active .burger-line:nth-child(3) {
  transform: rotate(-45deg) translateY(-8px);
}

/* Reveal animation base */
.reveal {
  opacity: 0;
  transform: translateY(40px);
}

/* Service cards hover glow */
.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(108, 99, 255, 0.5), rgba(0, 217, 255, 0.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.service-card:hover::before {
  opacity: 1;
}

/* Project card image zoom */
.project-card:hover .aspect-video span {
  transform: scale(1.15);
}
.project-card .aspect-video span {
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Mobile menu animation */
#mobile-menu {
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
#mobile-menu.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
#mobile-menu:not(.hidden) {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* =========================================================
   PROJETS — Effets et animations
   ========================================================= */

/* Reveal (si pas déjà présent) */
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
.reveal-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Effet tilt 3D léger sur les cartes projet */
.project-card {
  transform-style: preserve-3d;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.4s ease,
              box-shadow 0.4s ease;
}

.project-card:hover {
  box-shadow: 0 25px 50px -12px rgba(0, 217, 255, 0.15),
              0 0 0 1px rgba(0, 217, 255, 0.1);
}

/* Filtre masqué */
.project-card.is-hidden {
  display: none;
}

/* Filtres actifs */
.filter-btn.active {
  background: rgba(0, 217, 255, 0.1);
  border-color: rgba(0, 217, 255, 0.5);
  color: #00D9FF;
}

/* Transition douce pour les filtres */
.project-card {
  animation: cardFadeIn 0.5s ease forwards;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* =========================================================
   À PROPOS — Fondateurs
   ========================================================= */

.founder-card {
  transform-style: preserve-3d;
}

.founder-card:hover {
  box-shadow: 0 25px 50px -12px rgba(0, 217, 255, 0.12);
}

/* Timeline items */
.timeline-item {
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
/* =========================================================
   CONTACT — Styles
   ========================================================= */

#whatsapp-form select option {
  background: #0A0A1A;
  color: #fff;
}

/* Animation bouton WhatsApp au hover */
#whatsapp-form button[type="submit"]::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

#whatsapp-form button[type="submit"]:hover::before {
  transform: translateX(100%);
}

/* Disabled state */
#whatsapp-form button[type="submit"]:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}