/* --- Variables & Thème --- */
:root {
    --bg-main: #0a0a0a;
    --bg-gradient: linear-gradient(135deg, #0a0a0a 0%, #141414 100%);
    --card-bg: #151515;
    --border-color: #262626;
    
    --accent-green: #00ff87;
    --btn-grad-start: #0a7f2e;
    --btn-grad-end: #00c853;
    
    --text-main: #ffffff;
    --text-muted: #aaaaaa;
    
    --font-main: 'Inter', sans-serif;
    --radius: 10px;
    --transition: 0.3s ease;
}

/* --- Reset & Base --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-accent {
    color: var(--accent-green);
}

.text-muted {
    color: var(--text-muted);
}

.bg-darker {
    background-color: rgba(10, 10, 10, 0.5);
}

/* --- Typographie --- */
h1, h2, h3, h4 {
    font-weight: 700;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    letter-spacing: -0.5px;
}

/* --- Boutons --- */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 700;
    text-align: center;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(90deg, var(--btn-grad-start), var(--btn-grad-end));
    color: #ffffff;
}

.btn-primary:hover {
    box-shadow: 0 0 20px rgba(0, 255, 135, 0.4);
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.1rem;
    animation: pulse 2s infinite;
}

/* On désactive l'animation au survol pour laisser place à l'effet de hover natif */
.btn-large:hover {
    animation: none;
}

/* --- Animation Pulsation (Pulse) --- */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 255, 135, 0.6);
    }
    70% {
        box-shadow: 0 0 0 20px rgba(0, 255, 135, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 255, 135, 0);
    }
}

.btn-link {
    color: var(--accent-green);
    text-decoration: none;
    font-weight: 500;
}

.btn-link:hover {
    text-decoration: underline;
}

/* --- Cartes --- */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(21, 21, 21, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background-color var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
    background-color: rgba(21, 21, 21, 1);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    text-decoration: none;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo-icon {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-green);
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-main);
    transition: 0.3s;
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    position: relative;
    /* Dégradé spécifique pour l'effet parallaxe */
    background-image: radial-gradient(circle at 50% 30%, rgba(0, 255, 135, 0.15) 0%, transparent 70%);
    background-size: 100% 150%;
    background-position: center 0px;
}

#hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; /* Empêche le canvas de bloquer les clics */
}

.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
    position: relative;
    z-index: 1; /* Place le contenu au-dessus du canvas */
}

.split-text {
    text-align: left;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

/* --- Images & Screenshots --- */
.app-screenshot {
    width: 100%;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 15px 35px rgba(0,0,0,0.5), 0 0 20px rgba(0, 255, 135, 0.05);
    transition: var(--transition);
    display: block;
}

.app-screenshot:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 45px rgba(0,0,0,0.6), 0 0 30px rgba(0, 255, 135, 0.1);
}

/* --- Sections génériques --- */
.section {
    padding: 6rem 0;
}

/* --- Grille Téléchargement --- */
.download-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.latest-version {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.version-badge {
    background-color: rgba(0, 255, 135, 0.1);
    color: var(--accent-green);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
}

.smartscreen-alert {
    display: flex;
    gap: 1.5rem;
    border-color: rgba(255, 170, 0, 0.3);
}

.alert-icon {
    font-size: 2rem;
}

.alert-content p {
    color: var(--text-muted);
    margin-top: 0.5rem;
    font-size: 0.95rem;
}

.alert-content strong {
    color: var(--text-main);
}

/* --- Tableau Historique --- */
.table-responsive {
    overflow-x: auto;
    margin-top: 1.5rem;
}

.versions-table {
    width: 100%;
    border-collapse: collapse;
}

.versions-table th, 
.versions-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.versions-table th {
    color: var(--text-main);
    font-weight: 500;
}

.versions-table tr:last-child td {
    border-bottom: none;
}

/* --- Grille Aide / Tuto --- */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.step-card {
    position: relative;
    padding-top: 3rem;
}

.step-number {
    position: absolute;
    top: -20px;
    left: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--btn-grad-start), var(--btn-grad-end));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    box-shadow: 0 5px 15px rgba(0, 255, 135, 0.2);
}

.step-card h3 {
    margin-bottom: 1rem;
}

.step-card p {
    color: var(--text-muted);
}

.step-card code {
    background-color: #262626;
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--text-main);
}

/* --- Footer --- */
footer {
    background-color: var(--bg-main);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-link {
    color: var(--accent-green);
    text-decoration: none;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .download-grid,
    .steps-grid,
    .split-layout {
        grid-template-columns: 1fr;
    }

    .split-layout {
        gap: 3rem;
        text-align: center;
    }
    
    .split-text {
        text-align: center;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--card-bg);
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.3s ease;
    }
    
    .nav-links.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-links li {
        text-align: center;
        padding: 0.5rem 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
    }
}

/* --- Animations de défilement (Fade-in) --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    will-change: opacity, transform;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* --- FAQ / Accordéon --- */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 500;
    font-family: var(--font-main);
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--accent-green);
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 400;
    transition: transform 0.3s ease;
}

.faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s ease;
}

.faq-answer-inner {
    overflow: hidden;
}

.faq-answer-inner p {
    padding: 0 1.5rem 1.5rem 1.5rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.faq-item.active .faq-answer {
    grid-template-rows: 1fr;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
    color: var(--accent-green);
}

.faq-item.active {
    border-color: var(--accent-green);
    box-shadow: 0 0 15px rgba(0, 255, 135, 0.2);
}

/* --- Bouton Retour en haut --- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--btn-grad-start), var(--btn-grad-end));
    color: #ffffff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 255, 135, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    box-shadow: 0 0 20px rgba(0, 255, 135, 0.6);
    transform: translateY(-5px);
}