/* --- style.css --- */

/* 1. VARIABLES & THÈME */
:root {
    --bg-color: #FAFAFA;
    --text-main: #111111;
    --text-muted: #525252;
    --card-bg: #FFFFFF;
    --border-color: #E5E5E5;
    --primary: #111111;
    --primary-text: #FFFFFF;
    
    /* Gradients */
    --grad-start: #111111;
    --grad-end: #737373;

    /* Formes & Ombres */
    --radius-xl: 1rem;
    --radius-pill: 9999px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --glow-color: rgba(0, 0, 0, 0.05);
    
    --container-width: 1024px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #050505;
        --text-main: #EDEDED;
        --text-muted: #A3A3A3;
        --card-bg: #111111;
        --border-color: #262626;
        --primary: #FFFFFF;
        --primary-text: #000000;
        
        --grad-start: #FFFFFF;
        --grad-end: #737373;
        
        --shadow-sm: none;
        --shadow-lg: none;
        --glow-color: rgba(255, 255, 255, 0.1);
    }
}

/* 2. BASE & RESET */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

/* 3. NAVIGATION & HEADER */
nav, header {
    padding: 2rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo & Liens retour */
.logo, .back-link {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s, transform 0.2s;
}

.logo { 
    font-size: 1.25rem; 
    font-weight: 800; 
    letter-spacing: -0.02em; 
    color: var(--text-main); 
}

.back-link:hover {
    color: var(--text-main);
    transform: translateX(-3px);
}

/* 4. TYPOGRAPHIE & HERO COMMUN */
main { flex: 1; padding-bottom: 5rem; }

.hero, .hero-section {
    padding: 4rem 0 5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 2rem;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.03em;
    text-wrap: balance;
    margin-bottom: 0.5rem;
}

.gradient-text {
    background: linear-gradient(to right, var(--grad-start), var(--grad-end));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subtitle, .lead {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    text-wrap: pretty;
}

/* 5. ÉLÉMENTS UI (Boutons, Badges) */
.btn-download {
    background-color: var(--primary);
    color: var(--primary-text);
    padding: 1rem 2rem;
    border-radius: var(--radius-pill);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.2s;
    box-shadow: var(--shadow-lg);
}
.btn-download:hover { transform: scale(1.05); opacity: 0.95; }
.btn-download:active { transform: scale(0.98); }

.badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-pill);
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* 6. BANNIÈRE (Spécifique page Praxis) */
.banner-wrapper {
    margin-top: 3rem;
    position: relative;
    width: 100%;
    max-width: 900px;
}
.banner-wrapper::before {
    content: '';
    position: absolute;
    inset: -10px;
    background: linear-gradient(45deg, var(--border-color), var(--glow-color));
    filter: blur(20px);
    z-index: -1;
    opacity: 0.6;
    border-radius: 20px;
}
.store-banner {
    width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    display: block;
    box-shadow: var(--shadow-lg);
}

/* 7. GRILLES (Projets & Features) */
.projects-label {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    display: block;
}

.features-grid, .projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Style des cartes */
.feature-card, .project-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    position: relative;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.project-card { height: 100%; text-decoration: none; color: inherit; }

.feature-card:hover, .project-card:hover {
    border-color: var(--text-muted);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Contenu des cartes */
.feature-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--border-color);
    margin-bottom: 1rem;
    line-height: 1;
    transition: color 0.3s;
}
.feature-card:hover .feature-number { color: var(--text-muted); }

.project-title, .feature-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.project-desc, .feature-card p {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

/* Lien bas de carte */
.card-link {
    font-weight: 600;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
}
.project-card:hover .card-link svg { transform: translateX(4px); }
.card-link svg { transition: transform 0.2s; }

/* 8. FOOTER */
footer {
    padding: 3rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}
footer a { color: inherit; text-decoration: underline; }
footer a:hover { color: var(--text-main); }

/* 9. RESPONSIVE */
@media (max-width: 768px) {
    .hero, .hero-section { padding-top: 2rem; }
    .btn-download { width: 100%; justify-content: center; }
    h1 { font-size: 2.5rem; }
}