:root {
    /* Couleurs inspirées du logo Bati Percheron */
    --color-primary: #605041; /* Brun foncé */
    --color-secondary: #b09b71; /* Beige/Or */
    --color-secondary-light: #d4c5a5;
    --color-accent: #8b7454;
    
    --color-bg: #fdfbf7; /* Blanc cassé très léger */
    --color-surface: #ffffff;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-error: #d9534f;
    --color-success: #4caf50;
    
    --border-radius: 8px;
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 8px rgba(96, 80, 65, 0.08);
    --shadow-md: 0 8px 24px rgba(96, 80, 65, 0.12);
}

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

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

/* === Top Header & Call Banner === */
.top-header {
    background-color: var(--color-primary);
    width: 100%;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.call-banner {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1rem;
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
}

.call-banner:hover {
    background-color: var(--color-accent);
}

.call-banner svg {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.landing-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

@media (min-width: 768px) {
    .landing-container {
        padding: 4rem 2rem;
        flex-direction: row;
        align-items: flex-start;
        gap: 4rem;
    }
}

/* === Hero Section (Left side on Desktop) === */
.hero-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

@media (min-width: 768px) {
    .hero-section {
        position: sticky;
        top: 4rem;
        /* On garde l'alignement centré défini par défaut plus haut */
    }
}

.logo-container {
    margin-bottom: 2rem;
}

.logo {
    max-width: 250px;
    height: auto;
}

.text-logo h1 {
    font-family: 'Playfair Display', serif;
    color: var(--color-secondary);
    font-size: 2.5rem;
    line-height: 1.1;
    letter-spacing: 2px;
}

.text-logo p {
    color: var(--color-primary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-content h2 {
    font-family: 'Playfair Display', serif;
    color: var(--color-primary);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.hero-content p {
    color: var(--color-text-light);
    font-size: 1.1rem;
    max-width: 500px;
}

.instagram-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    padding: 0.8rem 1.5rem;
    background-color: #fafafa;
    border: 1px solid #e0e0e0;
    color: var(--color-primary);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.instagram-link:hover {
    background-color: #f0ebe1;
    border-color: var(--color-secondary);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.instagram-link svg {
    color: #E1306C; /* Instagram color */
}

/* === Form Section (Right side on Desktop) === */
.form-section {
    flex: 1;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.form-card {
    background: var(--color-surface);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--color-secondary);
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

@media (min-width: 500px) {
    .form-row {
        flex-direction: row;
    }
    .form-row .input-group {
        flex: 1;
    }
}

.input-group {
    margin-bottom: 1.5rem;
    position: relative;
}

label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.required {
    color: var(--color-secondary);
}

.optional {
    color: #999;
    font-size: 0.8rem;
    font-weight: normal;
}

input[type="text"],
input[type="tel"],
input[type="email"],
textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #e0e0e0;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-text);
    background-color: #fafafa;
    transition: var(--transition);
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
    background-color: var(--color-surface);
    box-shadow: 0 0 0 3px rgba(176, 155, 113, 0.15);
}

input.invalid,
textarea.invalid {
    border-color: var(--color-error);
    background-color: #fff8f8;
}

.error-message {
    color: var(--color-error);
    font-size: 0.8rem;
    margin-top: 0.4rem;
    display: none;
}

/* Submit Button */
.submit-btn {
    width: 100%;
    padding: 1rem;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.submit-btn:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
    transform: none;
}

/* Spinner Animation */
.spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading .spinner {
    display: block;
}
.loading span {
    display: none;
}

/* Success Message */
.success-message {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background-color: #eef5ee;
    border: 1px solid #c3e6cb;
    border-radius: var(--border-radius);
    color: #155724;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    animation: fadeIn 0.5s ease;
}

.success-message svg {
    color: var(--color-success);
    width: 40px;
    height: 40px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =========================================
   NOUVEAUX STYLES POUR LE SITE COMPLET
   ========================================= */

/* Navigation */
.main-nav {
    background-color: var(--color-surface);
    padding: 1.2rem max(2rem, calc((100% - 1200px) / 2 + 2rem));
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    border-bottom: 1px solid #f0f0f0;
}

.nav-brand {
    font-family: 'Playfair Display', serif;
    color: var(--color-primary);
    font-size: 1.5rem;
    letter-spacing: 1px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--color-text-light);
    font-weight: 500;
    transition: var(--transition);
    font-size: 1rem;
}

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

.nav-links a.active {
    position: relative;
}
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-secondary);
}

.nav-insta {
    display: flex !important;
    align-items: center;
    gap: 0.4rem;
    color: #E1306C !important;
    background-color: #fafafa;
    padding: 0.5rem 1rem !important;
    border-radius: 50px;
    border: 1px solid #eee;
}

.nav-insta:hover {
    background-color: #fcf4f6;
    border-color: #f1d4dd;
}

/* Structure Sections */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-family: 'Playfair Display', serif;
    color: var(--color-primary);
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.presentation-section {
    padding: 5rem 0;
    background-color: var(--color-bg);
}

.lead-text {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem auto;
    font-size: 1.15rem;
    color: var(--color-text-light);
}

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

.feature-card {
    background: var(--color-surface);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border-top: 3px solid var(--color-secondary);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

.feature-card h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.mt-1 {
    margin-top: auto;
}

/* Contact Section */
.contact-section {
    padding: 5rem 0;
    background-color: #f7f5f0;
}

.contact-grid {
    max-width: 600px;
    margin: 0 auto;
    background: var(--color-surface);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border-top: 4px solid var(--color-primary);
}

.contact-info h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-family: 'Playfair Display', serif;
}

.contact-info > p {
    margin-bottom: 2.5rem;
    color: var(--color-text-light);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.contact-method svg {
    color: var(--color-secondary);
    background: #fdfbf7;
    padding: 0.8rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 1px solid #f0eee8;
    flex-shrink: 0;
}

.contact-method strong {
    display: block;
    color: var(--color-primary);
    margin-bottom: 0.2rem;
    font-size: 1.1rem;
}

.contact-method a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: 1.1rem;
}

.contact-method a:hover {
    color: var(--color-secondary);
}

/* Footer */
.site-footer {
    background-color: var(--color-primary);
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: auto;
}

.legal-mentions {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 0.5rem;
}

@media (max-width: 768px) {
    .main-nav {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .contact-grid {
        padding: 2rem;
    }
}

/* Nouveaux styles pour logo nav et fichier */
.nav-logo-img {
    max-width: min(450px, 100%);
    max-height: 200px;
    height: auto;
    display: block;
}

.file-input {
    background-color: var(--color-surface) !important;
    padding: 0.5rem !important;
    border: 1px dashed #ccc !important;
    cursor: pointer;
}
.file-input::file-selector-button {
    background-color: var(--color-bg);
    border: 1px solid #e0e0e0;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    color: var(--color-text);
    cursor: pointer;
    margin-right: 1rem;
    font-family: inherit;
    font-weight: 500;
    transition: var(--transition);
}
.file-input::file-selector-button:hover {
    background-color: var(--color-secondary-light);
    color: var(--color-primary);
}

/* Page Vente de Matériaux */
.materials-section {
    padding: 4rem 0;
}
.section-subtitle {
    text-align: center;
    max-width: 600px;
    margin: -1.5rem auto 3rem auto;
    color: var(--color-text-light);
    font-size: 1.1rem;
}
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.material-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: var(--transition);
    border: 1px solid #f0f0f0;
    display: flex;
    flex-direction: column;
}
.material-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
}
.material-image-placeholder {
    width: 100%;
    height: 250px;
    background-color: #e9e5de;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
}
.material-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.material-content h3 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}
.material-content p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
    flex: 1;
}
.material-price {
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}
.material-buy-btn {
    text-align: center;
    display: block;
    width: 100%;
    box-sizing: border-box;
}

.file-input {
    background-color: var(--color-surface) !important;
    padding: 0.5rem !important;
    border: 1px dashed #ccc !important;
    cursor: pointer;
}
.file-input::file-selector-button {
    background-color: var(--color-bg);
    border: 1px solid #e0e0e0;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    color: var(--color-text);
    cursor: pointer;
    margin-right: 1rem;
    font-family: inherit;
    font-weight: 500;
    transition: var(--transition);
}
.file-input::file-selector-button:hover {
    background-color: var(--color-secondary-light);
    color: var(--color-primary);
}