/**
 * IAEDUCATION - Styles principaux
 * Style rétro-futuriste / 80s digital / terminal néon
 * ================================================
 */

/* === VARIABLES CSS === */
:root {
  /* Palette rétro-futuriste */
  --color-black: #0a0a0f;
  --color-violet: #8a2eff;
  --color-cyan: #00f7ff;
  --color-green: #00ff9f;
  --color-white: #e5e5e5;
  --color-violet-dim: rgba(138, 46, 255, 0.4);
  --color-cyan-dim: rgba(0, 247, 255, 0.4);
  
  /* Typographies */
  --font-display: 'Orbitron', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-glow: 0.3s ease;
  
  /* Espacements */
  --section-padding: 5rem 2rem;
  --container-max: 1200px;
  --nav-height: 70px;
}

/* === RESET & BASE === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background-color: var(--color-black);
  color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Effet scanlines léger en overlay */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
  z-index: 9999;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  color: var(--color-cyan);
  text-shadow: 0 0 30px var(--color-cyan-dim);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--color-violet);
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.4rem;
  color: var(--color-green);
  margin-bottom: 1rem;
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color var(--transition-fast), text-shadow var(--transition-glow);
}

a:hover {
  color: var(--color-violet);
  text-shadow: 0 0 15px var(--color-violet-dim);
}

/* === SCROLL PROGRESS BAR === */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-violet), var(--color-cyan));
  z-index: 10000;
  transition: width 0.1s ease;
  box-shadow: 0 0 10px var(--color-cyan);
}

/* === NAVIGATION FIXE === */
.nav-main {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 10, 15, 0.95);
  border-bottom: 1px solid var(--color-violet-dim);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  z-index: 1000;
  backdrop-filter: blur(10px);
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.nav-main:hover {
  border-bottom-color: var(--color-violet);
  box-shadow: 0 0 30px var(--color-violet-dim);
}

.nav-main__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-cyan);
  text-shadow: 0 0 20px var(--color-cyan-dim);
}

.nav-main__links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-main__link {
  font-size: 0.9rem;
  color: var(--color-white);
  position: relative;
  padding: 0.5rem 0;
}

.nav-main__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-cyan);
  transition: width var(--transition-smooth);
}

.nav-main__link:hover::after,
.nav-main__link.active::after {
  width: 100%;
}

/* Menu burger mobile */
.nav-main__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 10px;
  background: none;
  border: none;
}

.nav-main__burger span {
  width: 25px;
  height: 2px;
  background: var(--color-cyan);
  transition: var(--transition-fast);
}

.nav-main__burger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-main__burger.active span:nth-child(2) {
  opacity: 0;
}

.nav-main__burger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* === CONTAINER === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* === BOUTONS === */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-black);
  background: linear-gradient(135deg, var(--color-cyan), var(--color-green));
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s ease;
}

.btn:hover {
  box-shadow: 0 0 30px var(--color-cyan), 0 0 60px var(--color-cyan-dim);
  transform: translateY(-2px);
}

.btn:hover::before {
  left: 100%;
}

/* Effet glitch au hover */
.btn-glitch:hover {
  animation: glitch 0.3s ease;
}

@keyframes glitch {
  0% { transform: translate(0); }
  20% { transform: translate(-2px, 2px); }
  40% { transform: translate(2px, -2px); }
  60% { transform: translate(-2px, -2px); }
  80% { transform: translate(2px, 2px); }
  100% { transform: translate(0); }
}

/* === HERO SECTION === */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--nav-height) 2rem 4rem;
  position: relative;
  overflow: hidden;
}

/* Grid 3D perspective Tron-style */
.hero__grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  perspective: 500px;
  overflow: hidden;
}

.hero__grid-lines {
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background-image: 
    linear-gradient(rgba(138, 46, 255, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 46, 255, 0.15) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
  transform: rotateX(60deg) translateZ(-200px);
}

@keyframes gridMove {
  0% { transform: rotateX(60deg) translateZ(-200px) translateY(0); }
  100% { transform: rotateX(60deg) translateZ(-200px) translateY(50px); }
}

.hero__content {
  position: relative;
  z-index: 2;
  animation: fadeInUp 1.5s ease 2s both;
}

.hero__title {
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: 4px;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: var(--color-white);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

/* Curseur clignotant terminal */
.hero__cursor {
  display: inline-block;
  width: 3px;
  height: 1.2em;
  background: var(--color-cyan);
  margin-left: 4px;
  vertical-align: middle;
  animation: cursorBlink 1s step-end infinite;
}

@keyframes cursorBlink {
  50% { opacity: 0; }
}

/* === SECTION CARDS === */
.section {
  padding: var(--section-padding);
  position: relative;
}

.section__header {
  text-align: center;
  margin-bottom: 4rem;
}

.section__title {
  margin-bottom: 0.5rem;
}

.section__desc {
  color: var(--color-white);
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto;
}

/* Cartes rétro avec hover néon */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: rgba(138, 46, 255, 0.05);
  border: 1px solid var(--color-violet-dim);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, transparent, var(--color-cyan-dim));
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.card:hover {
  border-color: var(--color-cyan);
  box-shadow: 
    0 0 20px var(--color-violet-dim),
    inset 0 0 20px rgba(0, 247, 255, 0.05);
  transform: translateY(-5px);
}

.card:hover::before {
  opacity: 0.1;
}

.card__icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--color-green);
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-cyan);
  margin-bottom: 0.75rem;
}

.card__text {
  color: var(--color-white);
  opacity: 0.9;
  font-size: 0.95rem;
}

/* === BLOCS TERMINAL === */
.terminal-block {
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid var(--color-green);
  border-radius: 4px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.7;
  position: relative;
}

.terminal-block:not(.terminal-block--no-prefix)::before {
  content: '> ';
  color: var(--color-green);
}

.terminal-block--prompt {
  padding: 1.5rem 1.5rem 3rem;
}

.terminal-block__copy {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  background: var(--color-black);
  border: 1px solid var(--color-cyan);
  color: var(--color-cyan);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.terminal-block__copy:hover {
  background: var(--color-cyan);
  color: var(--color-black);
}

/* === TIMELINE === */
.timeline {
  position: relative;
  padding: 2rem 0;
}

.timeline__line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-violet), var(--color-cyan));
  transform: translateX(-50%);
  box-shadow: 0 0 15px var(--color-cyan-dim);
}

.timeline__item {
  position: relative;
  display: flex;
  margin-bottom: 3rem;
  align-items: center;
}

.timeline__item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline__item:nth-child(odd) .timeline__content {
  margin-left: 0;
  margin-right: 4rem;
  text-align: right;
}

.timeline__point {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 20px;
  background: var(--color-cyan);
  border-radius: 50%;
  box-shadow: 0 0 20px var(--color-cyan);
  z-index: 2;
  animation: pointPulse 2s ease infinite;
}

@keyframes pointPulse {
  0%, 100% { box-shadow: 0 0 20px var(--color-cyan); }
  50% { box-shadow: 0 0 40px var(--color-cyan), 0 0 60px var(--color-cyan-dim); }
}

.timeline__content {
  width: 45%;
  margin-left: 4rem;
  padding: 2rem;
  background: rgba(138, 46, 255, 0.1);
  border: 1px solid var(--color-violet-dim);
}

.timeline__year {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-cyan);
  margin-bottom: 0.5rem;
}

.timeline__title {
  font-size: 1.1rem;
  color: var(--color-green);
  margin-bottom: 0.75rem;
}

.timeline__text {
  color: var(--color-white);
  opacity: 0.9;
  font-size: 0.95rem;
}

/* === SCHEMAS CSS === */
.schema-block {
  background: rgba(0, 247, 255, 0.05);
  border: 1px dashed var(--color-cyan);
  padding: 2rem;
  margin: 2rem 0;
  text-align: center;
}

.schema-block__diagram {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-green);
  white-space: pre;
  overflow-x: auto;
  margin: 0;
}

/* === SCROLL REVEAL === */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* === BOOT LOADER OVERLAY === */
.boot-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-black);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 99999;
  transition: opacity 1s ease;
}

.boot-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.boot-overlay__text {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  color: var(--color-green);
  margin-bottom: 1rem;
}

.boot-overlay__cursor {
  display: inline-block;
  width: 3px;
  height: 1.2em;
  background: var(--color-green);
  animation: cursorBlink 0.8s step-end infinite;
}

/* === FOOTER === */
.footer {
  padding: 4rem 2rem 2rem;
  border-top: 1px solid var(--color-violet-dim);
  text-align: center;
}

.footer__links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

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

/* === PAGES LEGALES === */
.legal-page {
  padding: calc(var(--nav-height) + 4rem) 2rem 4rem;
}

.legal-page h1 {
  margin-bottom: 2rem;
}

.legal-page h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.legal-page p,
.legal-page li {
  margin-bottom: 1rem;
  max-width: 800px;
}

.legal-page ul {
  padding-left: 2rem;
}

/* === FAQ === */
.faq-item {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-violet-dim);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  color: var(--color-cyan);
}

/* === EASTER EGG GLITCH === */
.glitch-effect {
  animation: glitchBody 0.5s ease;
}

@keyframes glitchBody {
  0% { transform: translate(0); }
  10% { transform: translate(-3px, 2px); filter: hue-rotate(90deg); }
  20% { transform: translate(2px, -3px); filter: hue-rotate(-90deg); }
  30% { transform: translate(-2px, 3px); }
  40% { transform: translate(3px, -2px); filter: hue-rotate(90deg); }
  50% { transform: translate(-3px, -3px); }
  60% { transform: translate(2px, 2px); }
  70% { transform: translate(-2px, -2px); filter: hue-rotate(-90deg); }
  80% { transform: translate(3px, 2px); }
  90% { transform: translate(-2px, 3px); }
  100% { transform: translate(0); filter: none; }
}

/* === PAGE TITLE === */
.page-hero {
  padding: calc(var(--nav-height) + 4rem) 2rem 4rem;
  text-align: center;
  border-bottom: 1px solid var(--color-violet-dim);
}

.page-hero__title {
  margin-bottom: 0.5rem;
}

.page-hero__subtitle {
  color: var(--color-white);
  opacity: 0.8;
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .timeline__line {
    left: 20px;
  }
  
  .timeline__item {
    flex-direction: column !important;
    align-items: flex-start !important;
    padding-left: 50px;
  }
  
  .timeline__item:nth-child(odd) .timeline__content {
    margin-right: 0;
    text-align: left;
  }
  
  .timeline__point {
    left: 20px;
    transform: translateX(-50%);
  }
  
  .timeline__content {
    width: 100%;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }
}

@media (max-width: 768px) {
  .nav-main__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.98);
    flex-direction: column;
    padding: 2rem;
    gap: 1rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-smooth);
    border-bottom: 1px solid var(--color-violet-dim);
  }
  
  .nav-main__links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-main__burger {
    display: flex;
  }
  
  .section {
    padding: 3rem 1.5rem;
  }
}