/* Variables de couleurs et style de base */
:root {
    --primary-color: #0066cc;
    --primary-hover: #0052a3;
    --secondary-color: #0f172a;
    --secondary-hover: #1e293b;
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    scroll-behavior: smooth;
}

body {
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--white);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Boutons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background-color: var(--white);
    color: var(--secondary-color);
}

/* En-tête (Header) */
.header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

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

.nav {
    display: flex;
    gap: 24px;
}

.nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

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

/* Section Héro */
.hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--white);
    padding: 90px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.3rem;
    margin-bottom: 20px;
    line-height: 1.25;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: #94a3b8;
    max-width: 750px;
    margin: 0 auto 35px auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
}

/* Structure globale des sections */
section {
    padding: 70px 0;
}

.section-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 45px;
    color: var(--secondary-color);
}

/* Services */
.services {
    background-color: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
}

.card h3 {
    margin-bottom: 12px;
    color: var(--primary-color);
    font-size: 1.25rem;
}

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Garanties */
.guarantees-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.guarantee-item {
    padding: 25px;
    border-left: 4px solid var(--primary-color);
    background-color: var(--bg-light);
    border-radius: 0 8px 8px 0;
}

.guarantee-item h4 {
    margin-bottom: 8px;
    font-size: 1.1rem;
    color: var(--secondary-color);
}

.guarantee-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Contact */
.contact {
    background-color: var(--white);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--white);
    color: var(--text-dark);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
}

.btn-submit {
    width: 100%;
    margin-top: 10px;
    font-size: 1rem;
}

/* Pied de page */
.footer {
    background-color: var(--secondary-color);
    color: #94a3b8;
    text-align: center;
    padding: 30px 0;
    font-size: 0.9rem;
    border-top: 1px solid #334155;
}

/* Responsive (Smartphones & Tablettes) */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        height: auto;
        padding: 15px;
        gap: 15px;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }

    .btn-header {
        display: none;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-buttons {
        flex-direction: column;
    }
}