/* --- Variables CSS optimisées --- */
:root {
  --primary-color: #282828;
  --secondary-color: #ffffff;
  --accent-color: rgba(255, 255, 255, 0.1);
  --shadow-color: rgba(0, 0, 0, 0.3);
  --transition-speed: 0.3s;
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --navbar-height: 80px;
  --border-radius: 8px;

  /* Système de tailles responsive */
  --social-size: clamp(14px, 2.5vw, 24px);
  --social-padding: clamp(6px, 1.5vw, 12px);
  --social-margin: clamp(4px, 1vw, 10px);
  --box-width: clamp(100px, 20vw, 180px);
  --box-padding: clamp(10px, 2vw, 20px);
  --font-size: clamp(12px, 2vw, 18px);
}

p {
  color: black;
}

h1 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: black;
}

/* --- Reset et base optimisés --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  background: url(../images/IMG_1741.JPG) no-repeat center/cover fixed;
  background-color: var(--secondary-color);
  font-family: "Silkscreen", sans-serif;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 100vh;
  margin: 0;
  padding-top: var(--navbar-height);
  color: var(--primary-color);
  overflow-x: hidden;
}

/* --- Section d'accueil --- */
.welcome {
  margin: 0;
  height: calc(100vh - var(--navbar-height));
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  position: relative;
}

/* --- Liens sociaux optimisés --- */
.social-links {
  position: fixed;
  bottom: clamp(8px, 2vh, 15px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  justify-content: center;
  gap: var(--social-margin);
  z-index: 100;
  padding: 0.5rem;
  backdrop-filter: blur(10px);
  border-radius: calc(var(--border-radius) * 2);
  background: rgba(0, 0, 0, 0.1);
}

.fa {
  padding: var(--social-padding);
  font-size: var(--social-size);
  width: calc(var(--social-size) + var(--social-padding) * 2);
  height: calc(var(--social-size) + var(--social-padding) * 2);
  text-align: center;
  text-decoration: none;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.8);
  color: var(--secondary-color);
  transition:
    background-color var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.fa:hover {
  background-color: rgba(0, 0, 0, 0.95);
  box-shadow: 0 4px 15px var(--shadow-color);
}

/* --- Bouton principal optimisé --- */
button {
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(135deg, #000 0%, #333 100%);
  color: var(--secondary-color);
  cursor: pointer;
  transition:
    background var(--transition-speed) var(--transition-smooth),
    color var(--transition-speed) var(--transition-smooth),
    border-color var(--transition-speed) var(--transition-smooth),
    box-shadow var(--transition-speed) ease;
  border-radius: var(--border-radius);
  padding: clamp(10px, 2vw, 12px) clamp(20px, 4vw, 24px);
  border: 2px solid transparent;
  font-size: clamp(14px, 2vw, 16px);
  font-family: inherit;
  font-weight: 400;
  letter-spacing: 0.5px;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

button:hover {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #f0f0f0 100%);
  color: var(--primary-color);
  border-color: rgba(0, 0, 0, 0.2);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

button:active {
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* --- Boîtes (si utilisées) --- */
.box {
  width: var(--box-width);
  padding: var(--box-padding);
  margin: clamp(15px, 3vw, 20px) 0;
  font-size: var(--font-size);
  background: var(--accent-color);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: box-shadow var(--transition-speed) ease;
}

.box:hover {
  box-shadow: 0 8px 25px var(--shadow-color);
}

/* --- Media queries simplifiées --- */
@media (max-width: 480px) {
  :root {
    --navbar-height: 70px;
  }

  .social-links {
    padding: 0.3rem;
    gap: calc(var(--social-margin) * 0.8);
  }

  button {
    font-size: 14px;
    padding: 10px 18px;
  }
}

@media (min-width: 1024px) {
  .box:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  }
}

/* --- Accessibilité --- */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* --- États focus pour accessibilité --- */
.fa:focus {
  outline: 2px solid var(--secondary-color);
  outline-offset: 2px;
}

button:focus {
  outline: 2px solid var(--secondary-color);
  outline-offset: 2px;
}

@media (hover: none) {
  .fa:hover {
    background: initial;
    color: initial;
    box-shadow: none;
  }

  button:hover,
  .box:hover {
    background: initial;
    color: initial;
    box-shadow: none;
  }
}