:root {
--primary-color: #1e3a8a;     /* Bleu professionnel profond */
--primary-dark: #0f172a;      /* Bleu nuit pour contrastes */
--secondary-color: #10b981;   /* Vert émeraude moderne */

/* Palette mosaïque raffinée */
--mosaic-1: #177886;      /* Rouge corail pro */
--mosaic-2: #6674a5;      /* Orange ambré chaleureux */
--mosaic-3: #177886;      /* Jaune moutarde élégant */
--mosaic-4: #6674a5;      /* Vert menthe premium */
--mosaic-5: #1e3a8a;      /* Bleu ciel dynamique */
--mosaic-6: #1e3a8a;      /* Violet sophistiqué */
--background-color: #f5f5f7;
--surface-color: #ffffff;
--text-primary: #202124;
--text-secondary: #3c4043;
--font-family: 'Google Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
--transition-speed: 0.3s;
--border-radius: 12px;
--shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
--shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
--shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

body {
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

ul {
    list-style: none;
}

/* Header */
header {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo::before {
    content: "Mosaïc-Studio";
    color: var(--primary-color);
}

.logo::after {
    content: ".Store";
    color: var(--secondary-color);
    font-style: italic;
    font-weight: 300;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: 8rem 2rem 4rem;
    text-align: center;
    max-width: 100%;
    /* Allow full width for background */
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    background-color: var(--background-color);
}

/* Mosaic Background Effect */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(30deg, var(--mosaic-6) 12%, transparent 12.5%, transparent 87%, var(--mosaic-1) 87.5%, var(--mosaic-2)),
        linear-gradient(150deg, var(--mosaic-5) 12%, transparent 12.5%, transparent 87%, var(--mosaic-2) 87.5%, var(--mosaic-4)),
        linear-gradient(30deg, var(--mosaic-4) 12%, transparent 12.5%, transparent 87%, var(--mosaic-3) 87.5%, var(--mosaic-6)),
        linear-gradient(150deg, var(--mosaic-3) 12%, transparent 12.5%, transparent 87%, var(--mosaic-4) 87.5%, var(--mosaic-2)),
        linear-gradient(60deg, var(--mosaic-2) 25%, transparent 25.5%, transparent 75%, var(--mosaic-5) 75%, var(--mosaic-4)),
        linear-gradient(60deg, var(--mosaic-1) 25%, transparent 25.5%, transparent 75%, var(--mosaic-6) 75%, var(--mosaic-6));
    background-size: 80px 140px;
    background-position: 0 0, 0 0, 40px 70px, 40px 70px, 0 0, 40px 70px;
    opacity: 0.05;
    z-index: 0;
}

.hero>* {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 700px;
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background-color: var(--primary-dark);
}

/* Section Styles */
section {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 3rem;
    line-height: initial;
}

.section-title p {
    text-align: center;
    font-size: 1rem;
    line-height: 1.5;
    font-weight: 400;
    margin-bottom: 3rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 24px auto;
}

/* Apps Grid */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.app-card {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.app-icon {
    width: 80px;
    height: 80px;
    background-color: var(--background-color);
    border-radius: 20px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

/* Mosaic colors for app icons */
.apps-grid .app-card:nth-child(1) .app-icon { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); color: white; }
.apps-grid .app-card:nth-child(2) .app-icon { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); color: white; }
.apps-grid .app-card:nth-child(3) .app-icon { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); color: white; }
.apps-grid .app-card:nth-child(4) .app-icon { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); color: white; }
.apps-grid .app-card:nth-child(5) .app-icon { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); color: white; }
.apps-grid .app-card:nth-child(6) .app-icon { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); color: white; }

.app-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
    font-weight: 400;
}

.app-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.app-link {
    color: var(--primary-color);
    font-weight: 600;
}

/* About Section */
.about-content {
    background: var(--surface-color);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.tech-stack {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}
.tech-stack span {
    color: #ffffff;
    background: var(--primary-dark);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Contact Form */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--surface-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.contact-form {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: 1fr 1fr;
    align-items: start;
}

.contact-form label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.contact-form input,
.contact-form textarea {
    grid-column: span 2;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    transition: box-shadow var(--transition-speed), border-color var(--transition-speed);
}

.contact-form input[type="text"],
.contact-form input[type="email"] {
    height: 44px;
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form input[name="name"],
.contact-form input[name="email"] {
    grid-column: span 1;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(98, 0, 234, 0.08);
}

.contact-form .cta-button {
    border: 0px;
    width: 150px;
}

.contact-feedback {
    grid-column: span 2;
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

@media (max-width: 600px) {
    .contact-form {
        grid-template-columns: 1fr;
    }
    .contact-form input,
    .contact-form textarea,
    .contact-form .cta-button,
    .contact-feedback {
        grid-column: span 1;
    }
}

/* Footer */
footer {
    background-color: var(--surface-color);
    padding: 3rem 2rem;
    margin-top: 4rem;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    margin-left: 2rem;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--primary-color);
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
        /* Mobile menu implementation can be added later */
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links a {
        margin: 0 1rem;
    }
}

.top {
    margin: 10px;
}