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

body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(145deg, #0a0f1d, #101c2c);
  color: #f0f0f0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
  background-attachment: fixed;
  position: relative;
}

/* Fond animé dynamique (effet électrons/stars) */
body::before {
  content: "";
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(circle, rgba(0,255,255,0.1) 0%, rgba(0,0,0,0) 70%), url('https://www.transparenttextures.com/patterns/stardust.png');
  background-size: cover;
  opacity: 0.15;
  z-index: -1;
  animation: subtleMove 60s infinite linear;
}

@keyframes subtleMove {
  0% { background-position: 0 0; }
  100% { background-position: 1000px 1000px; }
}


/* BOUTONS ACTION */
.action-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 40px;
}

.bouton-image {
  width: 180px;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  cursor: pointer;
  border-radius: 15px;
  box-shadow: 0 0 20px rgba(0, 255, 213, 0.3);
  animation: pulsate 3s infinite alternate;
}

.bouton-image:hover {
  transform: scale(1.1);
  box-shadow: 0 0 50px rgba(0, 255, 213, 0.8);
}

@keyframes pulsate {
  from { box-shadow: 0 0 20px rgba(0, 255, 213, 0.3); }
  to   { box-shadow: 0 0 40px rgba(0, 255, 213, 0.5); }
}

/* FORMULAIRES */
.form-section {
  display: none;
  opacity: 0;
  margin-top: 50px;
  padding: 40px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  box-shadow: 0 0 30px rgba(0, 255, 213, 0.15);
  max-width: 600px;
  transition: opacity 0.6s ease;
}

.form-section.active {
  display: block;
  opacity: 1;
}

.form-section h2 {
  color: #00ffd5;
  text-align: center;
  margin-bottom: 30px;
  font-size: 1.8em;
}

form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

input {
  padding: 15px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 1em;
  transition: all 0.3s;
}

input::placeholder {
  color: #ccc;
}

input:focus {
  border-color: #00ffd5;
  box-shadow: 0 0 10px #00ffd5;
  background: rgba(255, 255, 255, 0.15);
}

/* BUTTON SUBMIT (VALIDE) */
.form-section button {
  background: linear-gradient(135deg, #00ffd5, #00aaff);
  color: #000;
  font-weight: bold;
  padding: 12px 24px;
  border: none;
  font-size: 1.1em;
  cursor: pointer;
  transition: all 0.5s ease;
  animation: morphShape 6s infinite ease-in-out;
  box-shadow: 0 0 15px rgba(0, 255, 213, 0.3);
  border-radius: 30% 40% 30% 40%;
  align-self: center;
  min-width: 120px;
}

.form-section button:hover {
  background-color: #00bfa1;
  box-shadow: 0 0 20px #00ffd5;
  transform: scale(1.05);
}

@keyframes morphShape {
  0%   { border-radius: 30% 40% 30% 40%; }
  25%  { border-radius: 50% 20% 50% 20%; }
  50%  { border-radius: 40% 30% 40% 30%; }
  75%  { border-radius: 20% 50% 20% 50%; }
  100% { border-radius: 30% 40% 30% 40%; }
}

/* PROGRESS BAR */
#progressBar {
  display: none;
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 10px;
  box-shadow: 0 0 10px rgba(0, 255, 213, 0.3);
}

#progressBar div {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #00ffd5, #00aaff);
  transition: width 0.3s ease;
}

/* PRESENTATION */
.presentation {
  display: block;
  margin-top: 50px;
  padding: 40px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 20px;
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 25px rgba(0, 255, 213, 0.15);
  max-width: 900px;
}

.presentation h2 {
  color: #00ffd5;
  text-align: center;
  font-size: 2em;
  margin-bottom: 25px;
  text-shadow: 0 0 10px #00ffd5;
}

.presentation p {
  font-size: 1.1em;
  line-height: 1.6;
  margin-bottom: 20px;
}

.presentation ul {
  margin-left: 25px;
  margin-bottom: 20px;
}

.presentation li::before {
  content: "✔";
  color: #00ffd5;
  margin-right: 8px;
}

.presentation li {
  margin-bottom: 10px;
  font-size: 1.05em;
}

/* FOOTER */
footer {
  margin-top: auto;
  padding: 20px;
  font-size: 0.9em;
  color: #999;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* CONFETTI CANVAS */
canvas.confetti-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

/* RESPONSIVE */
@media (max-width: 600px) {
  header h1 {
    font-size: 1.6em;
  }

  .action-buttons {
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    gap: 12px;
    width: 100%;
  }

  .bouton-image {
    width: 42vw;
    max-width: 140px;
    height: auto;
  }

  .form-section,
  .presentation {
    padding: 20px;
    width: 95%;
  }

  input {
    font-size: 1em;
    padding: 10px;
  }

  .form-section button {
    min-width: 90px;
    padding: 8px 18px;
    font-size: 0.95em;
  }

  .presentation h2 {
    font-size: 1.4em;
  }
}



header {
  width: 100%;
  padding: 20px;
  text-align: center;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.5);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

header h1 {
  margin-top: 15px;
  font-size: 2.2em;
  color: #00ffd5;
  text-shadow:
    0 0 10px #00ffd5,
    0 0 20px #00ffd5,
    0 0 40px #00ffd5,
    0 0 60px #00ffd5;
  transition: text-shadow 0.3s;
}

header h1:hover {
  text-shadow:
    0 0 20px #00ffd5,
    0 0 40px #00ffd5,
    0 0 60px #00ffd5,
    0 0 80px #00ffd5;
}

/* --- Effets animés dans la bordure noire du header --- */
header{
  position: relative;       /* pour contenir les pseudo-éléments */
  overflow: hidden;         /* coupe l'excédent d'effet */
}

/* Balayage lumineux interne */
header::before{
  content:"";
  position:absolute;
  inset:-20% -40%;          /* déborde pour un sweep fluide */
  pointer-events:none;
  background:
    radial-gradient(120% 60% at -20% 50%, rgba(0,255,213,.10), transparent 60%),
    linear-gradient(110deg, transparent 40%, rgba(255,255,255,.08) 50%, transparent 60%);
  transform: translateX(-60%);
  animation: headerSweep 7s linear infinite;
}
@keyframes headerSweep{
  to{ transform: translateX(60%); }
}

/* Bordure inférieure néon animée */
header::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:0;
  height:3px;
  pointer-events:none;
  background: linear-gradient(90deg,
    transparent 0%,
    #00ffd5 15%,
    transparent 30%,
    transparent 70%,
    #00ffd5 85%,
    transparent 100%);
  background-size: 200% 100%;
  animation: borderRun 4s linear infinite;
  box-shadow: 0 0 10px rgba(0,255,213,.6);
}
@keyframes borderRun{
  to{ background-position: -200% 0; }
}

/* Respect "moins de mouvement" */
@media (prefers-reduced-motion: reduce){
  header::before, header::after{ animation: none !important; }
}



/* =========================
   HEADER effects (lint-clean)
   ========================= */

/* Contexte */
header {
  position: relative;
  overflow: hidden;
  will-change: transform;
  box-shadow:
    inset 0 -1px 0 rgba(255,255,255,.07),
    0 6px 24px rgba(0,0,0,.35);
}

/* 1) Stries diagonales très légères (texture dynamique) */
header::before {
  content: "";
  position: absolute;
  inset: -10% -20%;
  background:
    repeating-linear-gradient(
      120deg,
      rgba(255,255,255,.06) 0px,
      rgba(255,255,255,.06) 2px,
      transparent 2px,
      transparent 8px
    );
  opacity: .25;
  mix-blend-mode: screen;
  transform: translateX(-20%);
  animation: hdrStripes 18s linear infinite;
  pointer-events: none;
}
@keyframes hdrStripes {
  to { transform: translateX(20%); }
}

/* 2) Balayage lumineux (sheen) */
header::after {
  content: "";
  position: absolute;
  inset: -30% -60%;
  background:
    radial-gradient(120% 60% at -20% 50%, rgba(0,255,213,.10), transparent 60%),
    linear-gradient(110deg, transparent 40%, rgba(255,255,255,.10) 50%, transparent 60%);
  transform: translateX(-60%);
  animation: headerSweep 7s linear infinite;
  pointer-events: none;
}
@keyframes headerSweep {
  to { transform: translateX(60%); }
}

/* 3) Bordure inférieure néon animée, sous le titre */
header h1 {
  position: relative;
}
header h1::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -14px;
  height: 3px;
  background: linear-gradient(90deg,
    transparent 0%,
    #00ffd5 12%,
    transparent 24%,
    transparent 76%,
    #00ffd5 88%,
    transparent 100%);
  background-size: 200% 100%;
  animation: borderRun 4.2s linear infinite;
  filter: drop-shadow(0 0 6px rgba(0,255,213,.6));
  pointer-events: none;
}
@keyframes borderRun {
  to { background-position: -200% 0; }
}

/* 4) Points scintillants subtils au-dessus du header */
header h1::before {
  content: "";
  position: absolute;
  top: -20px; left: 50%;
  width: 140%;
  height: calc(100% + 40px);
  transform: translateX(-50%);
  pointer-events: none;
  background:
    radial-gradient(2px 2px at 10% 30%, rgba(255,255,255,.6), transparent 60%),
    radial-gradient(1.5px 1.5px at 35% 70%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(2px 2px at 70% 20%, rgba(255,255,255,.55), transparent 60%),
    radial-gradient(1.5px 1.5px at 85% 60%, rgba(255,255,255,.4), transparent 60%);
  opacity: .15;
  animation: twinkle 3.8s ease-in-out infinite;
}
@keyframes twinkle {
  0%,100% { opacity: .08; filter: brightness(1); }
  50%     { opacity: .22; filter: brightness(1.15); }
}

/* Mobile optim */
@media (max-width: 600px) {
  header {
    backdrop-filter: blur(8px);
    box-shadow:
      inset 0 -1px 0 rgba(255,255,255,.06),
      0 5px 18px rgba(0,0,0,.32);
  }
  header::before { opacity: .18; animation-duration: 22s; }
  header::after  { animation-duration: 8s; }
  header h1::before { opacity: .10; }
  header h1::after  { animation-duration: 5.2s; }
}

/* Accessibilité : moins de mouvement */
@media (prefers-reduced-motion: reduce) {
  header::before,
  header::after,
  header h1::before,
  header h1::after {
    animation: none !important;
  }
}