@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;0,900;1,400&family=Inter:wght@400;500;600&display=swap');

html { scroll-behavior: smooth; }

:root {
    --bg-creme: #F9F8F5;
    --text-primary: #1A1A1C;
    --text-secondary: #6B6B6B;
    --accent: #E53935;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-creme);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .font-serif {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 900;
    letter-spacing: -0.02em;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

a:hover {
    opacity: 0.7;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }

/* Navigation (Oria-style Glassmorphism) */
nav {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1200px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    border-radius: 100px;
    z-index: 1000;
    
    /* Liquid Blur */
    background: rgba(249, 248, 245, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(0,0,0,0.05);
    box-shadow: 0 8px 32px rgba(0,0,0,0.04);
}

.nav-brand {
    font-size: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 900;
}

.hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 140px 0 60px; /* Offset for fixed nav */
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5.5rem);
    line-height: 1.1;
    margin-bottom: 24px;
    max-width: 900px;
}

.hero p {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 40px;
}

/* App Store Button */
.app-store-btn {
    display: inline-flex;
    align-items: center;
    background-color: var(--text-primary);
    color: var(--bg-creme);
    padding: 14px 28px;
    border-radius: 14px;
    font-weight: 600;
    gap: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.app-store-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    opacity: 1;
}

.app-store-btn svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* Features */
.features {
    padding: 80px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    padding: 40px;
    background: transparent;
    border-radius: 24px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, background 0.3s ease;
}

.feature-card:hover {
    background: rgba(0, 0, 0, 0.02);
    transform: translateY(-5px);
}

.feature-card h3 {
    font-size: 1.8rem;
    margin-bottom: 16px;
}

.feature-card p {
    color: var(--text-secondary);
}

/* Legal Pages */
.legal-content {
    max-width: 800px;
    margin: 80px auto;
    padding: 0 24px;
}

.legal-content h1 {
    font-size: 3rem;
    margin-bottom: 16px;
}

.legal-content .last-updated {
    color: var(--text-secondary);
    margin-bottom: 60px;
    font-size: 0.9rem;
}

.legal-content h2 {
    font-size: 1.5rem;
    margin-top: 40px;
    margin-bottom: 16px;
}

.legal-content p, .legal-content ul {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.legal-content ul {
    padding-left: 24px;
}

.legal-content li {
    margin-bottom: 8px;
}

/* Footer */
footer {
    padding: 60px 0 40px;
    border-top: 1px solid rgba(0,0,0,0.1);
    margin-top: 100px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Nouvelles Sections */
.overline {
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--accent);
    margin-bottom: 16px;
    display: block;
    font-weight: 700;
}

.content-section {
    padding: 80px 0;
    text-align: center;
}

.content-section h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 24px;
}

.content-section p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

/* Dots Concept */
.dots-container {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.dot-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    background: rgba(0,0,0,0.03);
    padding: 12px 24px;
    border-radius: 40px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot.red { background-color: #FF3B30; }
.dot.orange { background-color: #FF9500; }
.dot.blue { background-color: #007AFF; }

/* Promo Block */
.promo-block {
    background: var(--text-primary);
    color: var(--bg-creme);
    padding: 80px 24px;
    border-radius: 32px;
    text-align: center;
    margin: 80px 0;
}

.promo-block h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 24px;
    color: var(--bg-creme);
}

.promo-block p {
    color: rgba(255, 255, 255, 0.7);
    margin: 0 auto 40px;
    max-width: 500px;
    font-size: 1.2rem;
}

.promo-block .app-store-btn {
    background: var(--bg-creme);
    color: var(--text-primary);
}

/* Oria Inspired: Cinematic 35mm Grain Overlay */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.04;
    background-image: url("https://grainy-gradients.vercel.app/noise.svg");
    background-size: 200px 200px;
    filter: contrast(120%) brightness(100%);
}

/* Oria Inspired: Text wrap balance for beautiful typography */
h1, h2, h3 {
    text-wrap: balance;
}

/* Oria Inspired: Marquee Animation */
.marquee-container {
    overflow: hidden;
    white-space: nowrap;
    padding: 24px 0;
    border-top: 1px solid rgba(0,0,0,0.05);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    margin: 60px 0;
    background: rgba(0,0,0,0.01);
}

.marquee-content {
    display: inline-block;
    animation: marquee 30s linear infinite;
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.marquee-content span {
    margin: 0 40px;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}


/* =======================================
   ANIMATIONS (Oria Inspired)
   ======================================= */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.2, 0.8, 0.2, 1), transform 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

/* =======================================
   RESPONSIVENESS (Mobile & Desktop)
   ======================================= */
@media (min-width: 769px) {
    body {
        font-size: 1.1rem;
    }
    
    .hero {
        padding: 120px 0;
    }

    .hero h1 {
        font-size: 4.5rem;
        max-width: 800px;
        margin: 24px auto;
        line-height: 1.1;
    }
    
    .hero p {
        font-size: 1.25rem;
        max-width: 600px;
        margin: 0 auto 40px;
    }

    .feature-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
    }

    .content-section {
        padding: 100px 0;
        max-width: 800px;
        margin: 0 auto;
    }

    .content-section h2 {
        font-size: 3rem;
    }
    
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-end;
    }
    
    .footer-links {
        flex-direction: row;
        gap: 24px;
        align-items: center;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero h1 {
        font-size: 2.8rem;
        margin: 16px auto;
        line-height: 1.2;
    }
    
    .hero p {
        font-size: 1rem;
        margin: 0 auto 32px;
    }
    
    .feature-grid {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .content-section {
        padding: 60px 0;
    }

    .content-section h2 {
        font-size: 2.2rem;
    }

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
}

/* =======================================
   DARK MODE (Auto)
   ======================================= */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-creme: #121212; /* Onyx profond */
        --text-primary: #F9F8F5; /* Crème */
        --text-secondary: #999999;
    }
    
    body {
        background-color: var(--bg-creme);
    }
    
    .feature-card {
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid rgba(255, 255, 255, 0.05);
    }
    
    .marquee-container {
        border-top: 1px solid rgba(255, 255, 255, 0.05);
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        background: rgba(255, 255, 255, 0.01);
    }
    
    .app-store-btn {
        background: var(--text-primary);
        color: var(--bg-creme);
    }
    
    .app-store-btn svg {
        fill: var(--bg-creme);
    }
    
    nav {
        background: rgba(18, 18, 18, 0.75);
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    }
    
    .promo-block {
        /* On remplace le gros bloc blanc par un bloc élégant et sombre propre à l'ADN Trass */
        background: rgba(255, 255, 255, 0.05);
        color: var(--text-primary);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .promo-block h2 {
        color: var(--text-primary);
    }

    .promo-block p {
        color: var(--text-secondary);
    }
    
    .promo-block .app-store-btn {
        background: var(--text-primary);
        color: var(--bg-creme);
    }
}

/* =======================================
   FAQ ACCORDION
   ======================================= */
.faq-section {
    margin: 80px auto;
    max-width: 800px;
}

.faq-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding: 24px 0;
}

@media (prefers-color-scheme: dark) {
    .faq-item {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
}

.faq-question {
    font-size: 1.3rem;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, margin-top 0.4s ease, opacity 0.4s ease;
    opacity: 0;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    margin-top: 16px;
    opacity: 1;
}