/* Dark Theme */
body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    line-height: 1.6;
}

header {
    background: #1f1f1f;
    padding: 2rem;
    text-align: center;
    border-bottom: 2px solid #333;
}

h1 {
    margin: 0;
    font-size: 2.5rem;
    color: #9a42ff;
    text-align: center;
}

h2 {
    margin-top: 2rem;
    color: #9a42ff;
    border-bottom: 2px solid #333;
    padding-bottom: 10px;
    font-size: 2rem;
}

section {
    padding: 1rem 2rem;
    max-width: 900px;
    margin: auto;
}

ul {
    list-style: none;
    padding: 0;
}

ul li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #333;
}

.cards {
    --border-angle: 0deg;
    --bg: #1e1e1e;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.card {
    padding: 1rem;
    border-radius: 10px;
    flex: 1 1 250px;
    transition: transform 0.2s;
    box-shadow: 0px 2px 4px hsl(0 0% 0% / 25%);
    animation: border-angle-rotate 2s infinite linear;
    border: 0.3rem solid transparent;
    position: relative;
    background: linear-gradient(#1e1e1e, #302d2d) padding-box,
    conic-gradient(from var(--border-angle), var(--bg) 50%, #9a42ff) border-box;
}

.card:hover {
    transform: scale(1.02);
}

a {
    color: #9a42ff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
    margin-top: 1rem;
}

.slide img {
    width: 400px;
    height: auto;
    display: block;
    margin: 0.5rem auto;
}

footer {
    text-align: center;
    padding: 2rem;
    background: #1f1f1f;
    border-top: 2px solid #333;
    margin-top: 2rem;
}

::selection {
    background: #9a42ff;
    color: #FFFFFF;
}

.image-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1px;
    margin: 20px 0;
}

.image-container img {
    max-width: 300px;         /* Limite raisonnable par image */
    width: 100%;              /* Prend toute la largeur de son conteneur (jusqu'au max-width) */
    height: auto;
    border-radius: 12px;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    object-fit: contain;      /* Garde le ratio sans rognage */
    image-rendering: auto;    /* Utilise le rendu optimal selon le navigateur */
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

table, th, td {
    border: 1px solid #444;
}

th, td {
    padding: 10px;
    text-align: left;
}

th {
    background-color: #333;
}

@keyframes border-angle-rotate {
    from { --border-angle: 0deg; }
    to { --border-angle: 360deg; }
}

@property --border-angle {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
}

/* Modal styles */
.modal-bg {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0,0,0,0.8);
    justify-content: center;
    align-items: center;
    z-index: 999;
}

.modal {
  background-color: #1e1e1e;
  border-radius: 10px;
  padding: 2rem;
  max-width: 1000px;
  width: 95%;
  height: 95vh;
  overflow-y: auto;

  display: flex;
  flex-direction: column;

  h2 {
        text-align: center;
        font-size: 3rem;
    }
}

.slide {
  display: none;
}

.slide.active {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  flex: 1;
  text-align: center;
}


.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 5rem;
    color: #fff;
    cursor: pointer;
    user-select: none;
}

.nav-btn.left {
    left: 10px;
}

.nav-btn.right {
    right: 10px;
}

.present-btn {
    display: inline-block;
    background: #9a42ff;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    cursor: pointer;
    margin: 1rem;
    font-size: 1.2rem;
}