/* 
 * ADR Digital Building - Charte Graphique CSS
 * Auteur: Gemini
 * Basé sur la charte graphique fournie.
 */

/* --- 1. Variables et Configuration Globale --- */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&family=Roboto:wght@700&display=swap');

:root {
    /* Palette de couleurs */
    --couleur-primaire-1: #004D8C; /* Bleu Profond */
    --couleur-primaire-2: #00B3A4; /* Cyan Technologique */
    --couleur-neutre-1: #F5F5F5;   /* Gris/Blanc Pur (Fond) */
    --couleur-neutre-2: #222222;   /* Noir (Texte) */
    --couleur-blanc: #FFFFFF;
    --couleur-gris-clair: #E0E0E0;

    /* Typographie */
    --font-titres: 'Roboto', sans-serif;
    --font-corps: 'Open Sans', sans-serif;

    /* Autres */
    --radius: 8px;
    --transition-speed: 0.3s;
    --container-width: 1200px;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

/* --- 2. Styles de Base (Reset & Body) --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-corps);
    font-size: 16px;
    line-height: 1.7;
    color: var(--couleur-neutre-2);
    background-color: var(--couleur-blanc);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
}

section {
    padding: 80px 0;
}

section:nth-of-type(odd) {
    background-color: var(--couleur-neutre-1);
}

/* --- 3. Typographie --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-titres);
    font-weight: 700;
    color: var(--couleur-primaire-1);
    margin-bottom: 20px;
}

h1 { font-size: 3rem; line-height: 1.2; }
h2 { font-size: 2.5rem; text-align: center; margin-bottom: 40px; }
h3 { font-size: 1.5rem; color: var(--couleur-primaire-1); }

.section-description {
    text-align: center;
    max-width: 700px;
    margin: -20px auto 40px auto;
    font-size: 1.1rem;
    color: #555;
}

a {
    color: var(--couleur-primaire-2);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--couleur-primaire-1);
}

strong {
    color: var(--couleur-primaire-2);
    font-weight: 700;
}

/* --- 4. Composants UI (Boutons, Formulaires) --- */
.button-primaire, .button-secondaire {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--radius);
    font-family: var(--font-titres);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all var(--transition-speed);
    border: 2px solid transparent;
    cursor: pointer;
}

.button-primaire {
    background-color: var(--couleur-primaire-2);
    color: var(--couleur-blanc);
}

.button-primaire:hover {
    background-color: #008F82; /* Cyan plus foncé */
    color: var(--couleur-blanc);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 179, 164, 0.3);
}

.button-secondaire {
    background-color: transparent;
    color: var(--couleur-primaire-1);
    border-color: var(--couleur-primaire-1);
}

.button-secondaire:hover {
    background-color: var(--couleur-primaire-1);
    color: var(--couleur-blanc);
}

/* Formulaires */
.contact-form {
    max-width: 700px;
    margin: 40px auto 0 auto;
    background: var(--couleur-blanc);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-group {
    position: relative;
    margin-bottom: 25px;
}

.form-group .form-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #aaa;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form input[type="tel"],
.contact-form textarea {
    width: 100%;
    padding: 15px 15px 15px 45px; /* Espace pour l'icône */
    border: 1px solid var(--couleur-gris-clair);
    border-radius: var(--radius);
    font-family: var(--font-corps);
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

.contact-form textarea {
    padding-left: 15px;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--couleur-primaire-2);
    box-shadow: 0 0 0 3px rgba(0, 179, 164, 0.2);
}

.privacy-policy-field {
    margin-bottom: 20px;
}

/* Honeypot field - caché pour les humains, visible pour les bots */
.honeypot-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* --- 5. Header & Navigation --- */
.header {
    background-color: var(--couleur-blanc);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding-left: 5%;
    padding-right: 5%;
}

.logo-image {
    height: 120px; /* Hauteur contrôlée pour le logo */
    width: auto;
}


.nav-menu ul {
    list-style: none;
    display: flex;
}

.nav-menu li {
    margin-left: 30px;
}

.nav-menu a {
    font-family: var(--font-corps);
    font-weight: 700;
    color: var(--couleur-neutre-2);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    position: relative;
    padding-bottom: 5px;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--couleur-primaire-2);
    transition: width var(--transition-speed) ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

.menu-toggle { display: none; } /* Pour le responsive */

/* --- 6. Sections Spécifiques --- */

/* Hero */
.hero {
    background: linear-gradient(135deg, #005a9c 0%, #00B3A4 100%);
    color: var(--couleur-blanc);
    text-align: center;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.hero::before { /* Motif de circuit en arrière-plan */
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../img/circuit-pattern.svg'); /* Créez ce SVG */
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    opacity: 0.03;
}

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

.hero h1 {
    color: var(--couleur-blanc);
    font-size: 2.8rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: 25px;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto 35px auto;
    line-height: 1.8;
    color: var(--couleur-blanc);
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
    font-weight: 400;
}

/* Services */
.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    list-style: none;
    margin-top: 50px;
}

.service-item {
    background: var(--couleur-blanc);
    padding: 40px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.service-item i {
    font-size: 3rem;
    color: var(--couleur-primaire-2);
    margin-bottom: 20px;
}

/* Portfolio */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
    justify-items: center;
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 350px;
    height: 250px;
    display: block;
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.5s ease;
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to top, rgba(0, 77, 140, 0.9), transparent);
    color: var(--couleur-blanc);
    padding: 40px 20px 20px 20px;
    transform: translateY(100%);
    transition: transform var(--transition-speed) ease;
}

.portfolio-item:hover .portfolio-info {
    transform: translateY(0);
}

.portfolio-info h3 {
    color: var(--couleur-blanc);
    margin-bottom: 5px;
}

.portfolio-info span {
    font-size: 0.9rem;
    color: var(--couleur-primaire-2);
    font-weight: 700;
}

/* Processus */
.process-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin-top: 60px;
}

.process-steps::before { /* Ligne de connexion */
    content: '';
    position: absolute;
    top: 20px;
    left: 10%;
    right: 10%;
    height: 2px;
    background-color: var(--couleur-gris-clair);
    z-index: 1;
}

.step-item {
    width: 23%;
    text-align: center;
    position: relative;
    z-index: 2;
}

.step-item::before { /* Cercle */
    content: '';
    display: block;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--couleur-blanc);
    border: 2px solid var(--couleur-primaire-2);
    margin: 0 auto 20px auto;
    transition: background-color var(--transition-speed);
}

.step-item:hover::before {
    background-color: var(--couleur-primaire-2);
}

.step-item h3 {
    font-size: 1.1rem;
}

/* Contact */
.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    text-align: center;
    margin-bottom: 50px;
}

.contact-item p:first-child {
    font-weight: 700;
    margin-bottom: 5px;
}

/* --- 7. Footer --- */
.footer {
    background-color: var(--couleur-neutre-2);
    color: #aaa;
    padding: 40px 0;
    text-align: center;
    font-size: 0.9rem;
}

.footer a {
    color: var(--couleur-primaire-2);
}

.footer a:hover {
    color: var(--couleur-blanc);
}

.footer p {
    margin-bottom: 10px;
}

/* --- 8. Utilitaires (Scroll to top, etc.) --- */
.scroll-to-top-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background-color: var(--couleur-primaire-2);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none; /* Géré par JS */
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    z-index: 1000;
}

.scroll-to-top-logo {
    width: 60%;
    height: auto;
}

/* --- Popup (Thank you / Error) --- */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: none; /* Caché par défaut */
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.popup-overlay.is-visible {
    display: flex;
    opacity: 1;
}

.popup-content {
    background-color: var(--couleur-blanc);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    text-align: center;
    max-width: 500px;
    width: 90%;
    transform: scale(0.8);
    transition: transform 0.3s ease;
}

.popup-overlay.is-visible .popup-content {
    transform: scale(1);
}

.popup-content h3 {
    color: var(--couleur-primaire-1);
    margin-bottom: 20px;
}

.popup-content p {
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.popup-content--error .popup-icon {
    width: 60px;
    height: 60px;
    background-color: #e74c3c;
    color: var(--couleur-blanc);
    font-size: 2rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px auto;
}

/* --- 9. Responsive --- */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }

    .header {
        padding: 15px 5%;
    }

    .menu-toggle {
        display: block;
        background: none;
        border: none;
        font-size: 2rem;
        color: var(--couleur-primaire-1);
        cursor: pointer;
    }

    .nav-menu {
        display: none; /* Géré par JS */
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--couleur-blanc);
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        display: block;
    }

    .nav-menu ul {
        flex-direction: column;
        padding: 20px;
    }

    .nav-menu li {
        margin: 0;
        text-align: center;
    }

    .nav-menu a {
        display: block;
        padding: 15px;
    }

    .process-steps {
        flex-direction: column;
        gap: 40px;
    }

    .process-steps::before { display: none; }
    .step-item { width: 100%; }
}