/* =====================================================
   DATA SCIENCE DES DONNÉES — SOS PREPA
   ===================================================== */


/* ---------- BASE ---------- */
:root {
    --dark-navy: #151828;
    --accent-orange: #ff6b00;
    --white: #ffffff;
    --text-dark: #1f2335;
    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: "Poppins", sans-serif;
    color: #222;
    background-color: #f7f7f7;
    line-height: 1.7;
}

a {
    text-decoration: none;
}


/* ---------- HEADER ---------- */

/* ---------- NAVIGATION DU SITE ---------- */

/* =====================================================
   BARRE DES RÉSEAUX SOCIAUX
   ===================================================== */

.top-bar {
    background-color: var(--dark-navy);
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    position: sticky;
    top: 0;
    z-index: 1001;
}

.top-bar-content {
    
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.social-links {
    display: flex;
    align-items: center;
}

.social-links a {
    color: var(--white);
    margin-left: 15px;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    text-decoration: none;
}

.social-links a:hover {
    color: var(--accent-orange);
}


/* =====================================================
   BARRE DE NAVIGATION
   ===================================================== */

.container {
    width: 95%;
    max-width: 1400px;
    margin: 0 auto;
}

.main-header {
    background-color: var(--white);
    padding: 18px 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 36px;
    z-index: 1000;
}

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

.logo {
    text-decoration: none;
    font-size: 1.7rem;
    font-weight: 1000;
}

.logo-bold {
    color: #ff6b00;
}

.logo-orange {
    color: #111111;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

.main-nav a {
    text-decoration: none;
    color: #111111;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.main-nav a.active,
.main-nav a:hover {
    color: var(--accent-orange);
    border-bottom: 2px solid var(--accent-orange);
    padding-bottom: 4px;
}


/* =====================================================
   RESPONSIVE — NAVIGATION
   ===================================================== */

@media (max-width: 900px) {

    .header-container {
        flex-direction: column;
        gap: 15px;
    }

    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }
}
/* ---------- HERO ---------- */

.hero-specialite {
    background-color: #071a33;
    color: #ffffff;
    padding: 70px 20px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.hero-content {
    width: 90%;
    max-width: 1000px;
    margin: auto;
}

.breadcrumb {
    color: #f28c28;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 18px;
}

.hero-specialite h1 {
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: 25px;
}

.hero-text {
    max-width: 850px;
    font-size: 1.05rem;
    color: #e8edf3;
}


/* ---------- CONTENEUR PRINCIPAL ---------- */

.specialite-container {
    width: 90%;
    max-width: 1100px;
    margin: 60px auto;
}


/* ---------- SECTIONS ---------- */

.info-section {
    background-color: #ffffff;
    padding: 40px;
    margin-bottom: 35px;
    border-radius: 12px;
    box-shadow: 0 4px 18px rgba(0,0,0,0.06);
}

.info-section h2,
.profil-section h2 {
    color: #071a33;
    font-size: 1.7rem;
    margin-bottom: 22px;
    position: relative;
    padding-left: 18px;
}

.info-section h2::before,
.profil-section h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 7px;
    width: 5px;
    height: 28px;
    background-color: #f28c28;
    border-radius: 3px;
}

.info-section p {
    margin-bottom: 16px;
}


/* ---------- ACTIVITÉS ---------- */

.activity-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.activity-card {
    background-color: #f7f8fa;
    border: 1px solid #e4e7eb;
    border-radius: 10px;
    padding: 25px;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.activity-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.activity-card i {
    color: #f28c28;
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.activity-card h3 {
    color: #071a33;
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.activity-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
}


/* ---------- SYSTÈMES ---------- */

.systems-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-top: 25px;
}

.system-item {
    display: flex;
    align-items: center;
    gap: 15px;

    background-color: #f7f8fa;
    border: 1px solid #e4e7eb;
    border-radius: 8px;
    padding: 18px;
}

.system-item i {
    color: #f28c28;
    font-size: 1.4rem;
}

.system-item span {
    color: #071a33;
    font-weight: 600;
}


/* ---------- MÉTIERS ---------- */

.section-intro {
    margin-bottom: 25px;
}

.metiers-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.metier-card {
    display: flex;
    gap: 20px;
    align-items: flex-start;

    background-color: #f7f8fa;
    border: 1px solid #e0e4e8;
    border-radius: 10px;
    padding: 25px;

    color: #222;

    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        border-color 0.25s ease;
}

.metier-card:hover {
    transform: translateY(-4px);
    border-color: #f28c28;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.metier-icon {
    min-width: 48px;
    height: 48px;

    display: flex;
    align-items: center;
    justify-content: center;

    background-color: #071a33;
    color: #ffffff;

    border-radius: 50%;
}

.metier-icon i {
    font-size: 1.1rem;
}

.metier-card h3 {
    color: #071a33;
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.metier-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
}


/* ---------- PROFILS / EMPREINTES ---------- */

.profil-section {
    background-color: #fff7ed;
    padding: 40px;
    margin-bottom: 35px;
    border-radius: 12px;
    border-left: 5px solid #f28c28;
}

.profil-section > p {
    margin-bottom: 25px;
}

.profil-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}


/* ---------- FICHES D'EMPREINTE PROFESSIONNELLE ---------- */

.empreinte-card {
    background-color: #ffffff;
    border: 1px solid #eadfd2;
    border-radius: 10px;
    padding: 24px;
    scroll-margin-top: 120px;
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.empreinte-card:target {
    border-color: #f28c28;
    box-shadow: 0 0 0 3px rgba(242, 140, 40, 0.25);
}

.empreinte-card h3 {
    color: #071a33;
    font-size: 1.1rem;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #f2e7da;
}

.empreinte-dimension {
    margin-bottom: 14px;
}

.empreinte-dimension:last-child {
    margin-bottom: 0;
}

.empreinte-label {
    display: block;
    color: #9a7a55;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.empreinte-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.empreinte-tag {
    display: inline-block;
    background-color: #fff1de;
    color: #b35c00;
    border: 1px solid #f6d9b3;
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 0.78rem;
    font-weight: 500;
}


/* ---------- NAVIGATION BAS ---------- */

.navigation-bottom {
    text-align: center;
    margin: 45px 0;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;

    color: #071a33;
    font-weight: 600;

    transition: color 0.3s ease;
}

.back-link:hover {
    color: #f28c28;
}


/* ---------- FOOTER ---------- */

.site-footer {
    background-color: #071a33;
    color: #ffffff;
    text-align: center;
    padding: 25px 20px;
    font-size: 0.85rem;
}


/* ---------- RESPONSIVE ---------- */

@media (max-width: 900px) {

    .header-container {
        flex-direction: column;
    }

    .main-nav {
        justify-content: center;
    }

    .activity-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .profil-grid {
        grid-template-columns: 1fr;
    }
}


@media (max-width: 650px) {

    .hero-specialite {
        padding: 50px 15px;
    }

    .hero-specialite h1 {
        font-size: 2.1rem;
    }

    .specialite-container {
        width: 94%;
        margin: 35px auto;
    }

    .info-section,
    .profil-section {
        padding: 25px 20px;
    }

    .activity-grid,
    .systems-grid,
    .metiers-grid,
    .profil-grid {
        grid-template-columns: 1fr;
    }

    .main-nav {
        gap: 10px;
    }

    .main-nav a {
        font-size: 0.75rem;
    }
}