/* Variables et Thèmes */
:root {
    /* Mode Clair */
    --bg-color: #f0f4f8;
    --card-bg: rgba(255, 255, 255, 0.65);
    --card-border: rgba(255, 255, 255, 0.4);
    --text-main: #1a233a;
    --text-muted: #64748b;
    --primary-blue: #0ea5e9;
    --primary-blue-hover: #0284c7;
    --accent-whatsapp: #25D366;
    --accent-whatsapp-hover: #128C7E;
    --accent-facebook: #1877F2;
    --accent-facebook-hover: #166FE5;
    --disabled-bg: #cbd5e1;
    --disabled-text: #64748b;
    --shadow-color: rgba(14, 165, 233, 0.1);
    --glow: rgba(255, 255, 255, 0.5);
}

[data-theme="dark"] {
    /* Mode Sombre */
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.4);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary-blue: #38bdf8;
    --primary-blue-hover: #7dd3fc;
    --accent-facebook: #1877F2;
    --accent-facebook-hover: #3b82f6;
    --disabled-bg: #334155;
    --disabled-text: #94a3b8;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --glow: rgba(56, 189, 248, 0.15);
}

/* Reset de base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Base Styles */
body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: background-color 0.5s ease, color 0.5s ease;
    
    /* Motif de fond dynamique */
    background-image: 
        radial-gradient(circle at 10% 20%, var(--glow), transparent 40%),
        radial-gradient(circle at 90% 80%, var(--glow), transparent 40%);
    background-attachment: fixed;
    overflow-x: hidden;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.container {
    width: 100%;
    max-width: 550px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    z-index: 1;
}

/* En-tête et Logo */
.header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    width: 100%;
    animation: slideDown 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.main-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary-blue);
    text-align: center;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-shadow: 0 4px 15px var(--shadow-color);
}

.logo {
    max-width: 220px;
    height: auto;
    border-radius: 18px;
    box-shadow: 0 12px 30px var(--shadow-color);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    background-color: white; /* Pour assurer la lisibilité si le logo est transparent */
}

.logo:hover {
    transform: translateY(-8px) scale(1.02);
}

.main-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

/* Glassmorphism Card pour le Code Promo */
.promo-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 28px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: 0 20px 40px var(--shadow-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    position: relative;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    animation: fadeIn 0.8s ease-out 0.2s both;
}

.promo-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 50px var(--shadow-color);
}

.promo-card h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.promo-box {
    background-color: var(--bg-color);
    border: 2px dashed var(--primary-blue);
    border-radius: 16px;
    padding: 1.2rem 2.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.promo-box:hover {
    background-color: var(--glow);
    border-color: var(--primary-blue-hover);
    transform: scale(1.05);
}

.promo-box:active {
    transform: scale(0.95);
}

.promo-box:focus-visible {
    outline: 3px solid var(--primary-blue);
    outline-offset: 4px;
}

#promo-code {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-blue);
    letter-spacing: 4px;
    text-shadow: 0 4px 10px var(--shadow-color);
}

.copy-icon {
    color: var(--primary-blue);
    opacity: 0.6;
    transition: opacity 0.3s, transform 0.3s;
}

.promo-box:hover .copy-icon {
    opacity: 1;
    transform: rotate(10deg);
}

/* Toast de notification */
.toast {
    position: absolute;
    bottom: -18px;
    background-color: var(--primary-blue);
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    opacity: 0;
    transform: translateY(15px);
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    pointer-events: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* Message d'invitation */
.invite-message {
    text-align: center;
    font-size: 1.1rem; /* Un peu plus grand */
    font-weight: 600; /* Un peu plus gras */
    line-height: 1.4;
    color: var(--text-main); /* Texte principal pour plus de visibilité */
    margin-bottom: -0.5rem;
    padding: 0 1rem;
    animation: fadeIn 0.8s ease-out 0.3s both;
}

/* Liens / Boutons */
.links-section {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    width: 100%;
    animation: fadeIn 0.8s ease-out 0.4s both;
}

.link-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    width: 100%;
    padding: 1.25rem 2rem;
    border-radius: 20px;
    font-size: 1.15rem;
    font-weight: 600;
    text-decoration: none;
    color: white;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 10px 25px var(--shadow-color);
    position: relative;
    overflow: hidden;
}

.link-btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(rgba(255,255,255,0.15), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.link-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px var(--shadow-color);
}

.link-btn:hover::before {
    opacity: 1;
}

.link-btn:active {
    transform: translateY(0);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.whatsapp-btn {
    background-color: var(--accent-whatsapp);
    animation: pulse 2s infinite; /* Ajout de l'animation de pulsation */
}

.whatsapp-btn:hover {
    background-color: var(--accent-whatsapp-hover);
    animation: none; /* Arrêt de la pulsation au survol */
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
    }
}

.facebook-btn {
    background-color: var(--accent-facebook);
}

.facebook-btn:hover {
    background-color: var(--accent-facebook-hover);
}

.disabled-btn {
    background-color: var(--disabled-bg) !important;
    color: var(--disabled-text) !important;
    cursor: not-allowed;
    box-shadow: none;
}

.disabled-btn:hover {
    transform: none;
    box-shadow: none;
}

.disabled-btn::before {
    display: none;
}

.btn-icon {
    flex-shrink: 0;
}

/* Bouton Thème */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 50%;
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-main);
    box-shadow: 0 8px 20px var(--shadow-color);
    z-index: 100;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), background-color 0.4s ease;
}

.theme-toggle:hover {
    transform: scale(1.15) rotate(15deg);
    background: var(--glow);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.sun-icon, .moon-icon {
    position: absolute;
    transition: opacity 0.4s ease, transform 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

[data-theme="dark"] .sun-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme="dark"] .moon-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

[data-theme="light"] .sun-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

[data-theme="light"] .moon-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

/* Animations clés */
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsivité Mobile */
@media (max-width: 500px) {
    .container {
        padding: 1.5rem;
        gap: 2rem;
    }
    
    .theme-toggle {
        top: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
    
    .logo {
        max-width: 180px;
    }
    
    .promo-card {
        padding: 2rem 1.5rem;
    }

    #promo-code {
        font-size: 2.2rem;
        letter-spacing: 2px;
    }
    
    .promo-box {
        padding: 1rem 1.5rem;
        gap: 1rem;
    }
    
    .link-btn {
        font-size: 1.05rem;
        padding: 1.15rem;
    }
}