/* --- VARIABLES ET CONFIGURATION --- */
:root {
    --primary-blue: #1a73e8; 
    --bg-color: #f8f9fa; 
    --card-bg: #ffffff;
    --text-dark: #202124;
    --text-gray: #5f6368;
    --white: #ffffff;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-dark);
    /* Utilisation de Helvetica (Police système ultra-rapide) */
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3 { 
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; 
    font-weight: 700;
}

/* --- HEADER & LOGO --- */
header {
    background-color: var(--card-bg);
    padding: 10px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 12px;
}

.logo-img {
    height: 25px; /* Taille optimisée pour le menu */
    width: auto;
}

header h1 { 
    font-size: 1.1rem; 
    color: var(--text-dark);
    margin: 0;
}

header h1 span { color: var(--primary-blue); }

/* --- NAVIGATION & LIEN ACTIF --- */
nav ul { 
    list-style: none; 
    display: flex; 
    gap: 25px; 
}

nav a { 
    color: var(--text-gray); 
    text-decoration: none; 
    font-weight: 500; 
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

/* État actif (page courante) et survol */
nav a:hover, 
nav a.active { 
    color: var(--primary-blue); 
}

/* --- HERO SECTION --- */
.hero {
    padding: 100px 5%;
    text-align: center;
    /* Image locale contrastée */
    background: radial-gradient(circle, rgba(0,0,0,0.3) 0%, rgba(5, 25, 50, 0.7) 100%), 
                url('img/plombier-delhomme-cher-18.jpg') center/cover;
    color: var(--white);
}

.hero h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 15px rgba(0,0,0,0.5);
    letter-spacing: -0.5px;
}

.hero p {
    font-size: 1.2rem;
    max-width: 750px;
    margin: 0 auto 35px auto;
}

/* --- BOUTON CTA --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-blue);
    color: white !important;
    padding: 15px 35px;
    text-decoration: none;
    font-weight: 600;
    border-radius: 50px; 
    transition: 0.3s ease;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.4);
    gap: 12px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 115, 232, 0.5);
    background-color: #1557b0;
}

/* --- SECTIONS ET SERVICES --- */
.container { 
    padding: 80px 5%; 
    max-width: 1200px; 
    margin: auto; 
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 60px; /* Espace pour laisser respirer sous le titre */
    color: var(--primary-blue);
}

.services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 80px;
}

.service-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.06);
    border: 1px solid #eee;
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-card h3 { margin-bottom: 15px; font-size: 1.3rem; }
.service-card p { color: var(--text-gray); font-size: 0.95rem; }

/* --- CONTACT ET FORMULAIRE --- */
.contact-form {
    max-width: 600px;
    margin: 40px auto;
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.form-group { margin-bottom: 20px; text-align: left; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; font-size: 0.9rem; }

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
}

.submit-btn { 
    width: 100%; 
    border: none; 
    cursor: pointer; 
    margin-top: 10px; 
}

/* --- WIDGETS ET FOOTER --- */
.widget-container {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

footer {
    background-color: #1a1a1a;
    color: #9aa0a6;
    text-align: center;
    padding: 50px 5%;
    margin-top: 80px;
    font-size: 0.9rem;
}

footer a { text-decoration: none; transition: 0.3s; }
footer a:hover { color: var(--white); }

/* --- RESPONSIVE MOBILE --- */
@media (max-width: 768px) {
    header { 
        flex-direction: column; 
        gap: 15px; 
        padding: 15px;
    }

    .hero h2 { font-size: 1.8rem; }
    .hero p { font-size: 1rem; }
    
    .section-title { 
        font-size: 1.6rem; 
        margin-bottom: 30px; 
    }

    .container { padding: 40px 5%; }

    .form-grid {
        grid-template-columns: 1fr !important;
    }
}