/* Importation de polices beaucoup plus fines et délicates */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500&family=Poppins:wght@300;400&display=swap');

:root {
    --bleu-nuit: #050a15; 
    --accent-lumineux: #FFC300; 
    --texte-clair: #E6F1FF; 
    --texte-assombri: #A8B2D1; 
    
    --glass-bg: rgba(17, 34, 64, 0.4);
    --glass-border: rgba(255, 255, 255, 0.05);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    color: var(--texte-clair); 
    background-color: var(--bleu-nuit); 
    background-image: radial-gradient(circle at 15% 50%, rgba(255, 195, 0, 0.03), transparent 25%),
                      radial-gradient(circle at 85% 30%, rgba(255, 195, 0, 0.03), transparent 25%);
    line-height: 1.7;
    font-weight: 300;
}

/* Allègement de la typographie : finie la raideur */
h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 400; /* Typographie délicate */
    text-transform: uppercase;
    letter-spacing: 3px; /* Plus d'air entre les lettres */
}

/* En-tête */
header {
    background-color: transparent; 
    color: var(--texte-clair);
    text-align: center;
    padding: 140px 20px;
    border-bottom: 1px solid var(--glass-border);
    position: relative;
}

header h1 {
    font-size: 4.5em;
    font-weight: 300; /* Très fin et élégant */
    margin: 0;
    letter-spacing: 8px;
    color: var(--accent-lumineux);
    text-shadow: 0 0 20px rgba(255, 195, 0, 0.3);
}

header h2 {
    font-size: 1.2em;
    font-weight: 400;
    letter-spacing: 4px;
    color: var(--texte-clair);
    margin-top: 15px;
}

header p {
    font-size: 1.05em;
    color: var(--texte-assombri);
    max-width: 600px;
    margin: 20px auto 0;
    font-weight: 300;
}

/* --- RÉSEAUX SOCIAUX FLOTTANTS --- */
.sticky-social-wrapper {
    position: sticky;
    top: 50px;
    margin-top: 40px;
    height: 0; 
    z-index: 100;
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.sticky-social-icons {
    position: absolute;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.social-icon {
    width: 45px;
    height: 45px;
    background-color: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-lumineux);
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

.social-icon:hover {
    background-color: var(--accent-lumineux);
    color: var(--bleu-nuit);
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(255, 195, 0, 0.4);
}

.social-icon svg { width: 22px; height: 22px; fill: currentColor; }

@media (max-width: 768px) {
    body { padding-bottom: 60px; }
    .sticky-social-wrapper {
        position: fixed; top: auto; bottom: 0; left: 0; width: 100%; height: 60px; margin: 0;
        background-color: rgba(5, 10, 21, 0.8);
        backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
        border-top: 1px solid var(--glass-border);
        z-index: 9999;
    }
    .sticky-social-icons {
        position: relative; right: auto; flex-direction: row; justify-content: space-evenly; align-items: center; height: 100%; padding: 0; gap: 0;
    }
    .social-icon { width: 40px; height: 40px; box-shadow: none; border: none; background: transparent; }
    .social-icon:hover { background: transparent; color: var(--accent-lumineux); transform: none; box-shadow: none;}
}

/* Sections générales */
section {
    padding: 90px 20px;
    max-width: 900px;
    margin: 0 auto;
}

.section-title {
    font-size: 2em;
    font-weight: 300;
    text-align: center;
    color: var(--texte-clair);
    margin-bottom: 60px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background-color: var(--accent-lumineux);
    margin: 20px auto 0;
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(255, 195, 0, 0.5);
}

p { font-weight: 300; font-size: 1.05em; color: var(--texte-assombri); text-align: justify; }
strong { color: var(--texte-clair); font-weight: 400; }

/* Grille Formule (Glassmorphism) */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 35px 25px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    border-top: 2px solid var(--accent-lumineux);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5), 0 0 15px rgba(255, 195, 0, 0.1);
}

.feature-card h3 {
    color: var(--accent-lumineux);
    font-size: 1.1em;
    margin-top: 0;
}

/* Boutons */
.btn {
    display: inline-block;
    padding: 15px 35px;
    background-color: transparent;
    color: var(--accent-lumineux);
    text-decoration: none;
    font-family: 'Montserrat', sans-serif;
    font-weight: 400;
    font-size: 0.9em;
    border-radius: 4px;
    transition: all 0.3s ease;
    border: 1px solid var(--accent-lumineux);
    cursor: pointer;
    text-align: center;
    letter-spacing: 2px;
}

.btn:hover {
    background-color: var(--accent-lumineux);
    color: var(--bleu-nuit);
    box-shadow: 0 0 20px rgba(255, 195, 0, 0.3);
}

/* Lecteur Audio (Glassmorphism) */
.audio-container {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-left: 2px solid var(--accent-lumineux);
    border-radius: 0 8px 8px 0;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    display: flex;
    flex-direction: column;
    gap: 15px;
    transition: transform 0.3s ease;
}

.audio-container:hover { transform: translateX(5px); }
.audio-container h4 { margin: 0; color: var(--texte-clair); font-size: 1.1em; font-weight: 400; letter-spacing: 2px; }

audio {
    width: 100%; height: 40px; outline: none;
    filter: invert(90%) hue-rotate(180deg) brightness(1.2);
}

/* Formulaires */
input, textarea {
    width: 100%; padding: 15px; margin-bottom: 20px;
    font-family: 'Poppins', sans-serif; font-weight: 300;
    border: 1px solid var(--glass-border);
    background-color: rgba(0, 0, 0, 0.3);
    color: var(--texte-clair);
    border-radius: 6px; box-sizing: border-box;
    transition: all 0.3s ease;
}

input::placeholder, textarea::placeholder { color: var(--texte-assombri); opacity: 0.6; font-weight: 300; }

input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-lumineux);
    background-color: rgba(0, 0, 0, 0.5);
    box-shadow: 0 0 15px rgba(255, 195, 0, 0.1);
}

footer {
    text-align: center; padding: 40px;
    background-color: rgba(0, 0, 0, 0.5);
    color: var(--texte-assombri); font-size: 0.85em; font-weight: 300;
    border-top: 1px solid var(--glass-border);
    letter-spacing: 1px;
}