/* ==========================================================
   PAGE MATHÉMATIQUES — PROGRAMME MP
   ========================================================== */

/* ==========================================================
   TOP BAR
   ========================================================== */

.top-bar {
    background: #ffffff;
    padding: 8px 0;
    border-bottom: 1px solid #e6e6e6;
}

.top-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: flex-end;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    color: #1a1a1a;
    opacity: 0.6;
    transition: opacity 0.3s ease;
    font-size: 14px;
}

.social-icons a:hover {
    opacity: 1;
    color: #F57C00;
}

/* ==========================================================
   NAVIGATION PRINCIPALE — FOND BLANC
   ========================================================== */

.navbar {
    background: #ffffff;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid #F57C00;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* LOGO */
.logo a {
    display: flex;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    font-size: 20px;
    font-weight: 700;
    color: #1a1a1a;
}

.logo-orange {
    color: #F57C00;
}

.logo-black {
    color: #1a1a1a;
}

/* MENU NAVIGATION */
.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 4px;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin: 0;
}

.nav-menu li a {
    color: #1a1a1a;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
    white-space: nowrap;
}

.nav-menu li a:hover {
    background: rgba(245, 124, 0, 0.08);
    color: #F57C00;
}

/* Lien actif "MATHÉMATIQUES" */
.nav-menu li a.active {
    background: #F57C00;
    color: #ffffff;
}

.nav-menu li a.active:hover {
    background: #e06b00;
}

/* Indicateur de page active */
.nav-menu li a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: #F57C00;
    border-radius: 2px;
}

/* ==========================================================
   CONTENEUR GÉNÉRAL
   ========================================================== */

.mp-page {
    width: 100%;
    background: #f4f4fb;
}

/* ==========================================================
   HERO MP
   ========================================================== */

.mp-hero {
    background: #19182f;
    color: #ffffff;
    padding: 75px 20px 80px;
    text-align: center;
}

.mp-hero-inner {
    max-width: 900px;
    margin: 0 auto;
}

.mp-kicker {
    display: inline-block;
    margin-bottom: 15px;
    color: #F57C00;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.mp-hero h1 {
    margin: 0 0 22px;
    font-size: 42px;
    line-height: 1.15;
    font-weight: 800;
}

.mp-hero h1 span {
    color: #F57C00;
}

.mp-hero p {
    max-width: 720px;
    margin: 8px auto;
    font-size: 15px;
    line-height: 1.8;
    font-weight: 300;
}

.mp-hero strong {
    color: #F57C00;
    font-weight: 600;
}

/* ==========================================================
   SECTIONS PROGRAMME
   ========================================================== */

.mp-program {
    padding: 75px 20px 85px;
}

.mp-section-heading {
    text-align: center;
    margin-bottom: 45px;
}

.mp-section-heading > span {
    display: block;
    margin-bottom: 10px;
    color: #F57C00;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.mp-section-heading h2 {
    margin: 0;
    color: #171717;
    font-size: 30px;
    line-height: 1.2;
    font-weight: 800;
}

.mp-heading-line {
    width: 42px;
    height: 3px;
    margin: 18px auto 0;
    background: #F57C00;
}

/* ==========================================================
   GRILLE DES DOMAINES
   ========================================================== */

.mp-domain-grid {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

/* ==========================================================
   CARTES — FOND BLANC, TEXTES NOIRS
   ========================================================== */

.mp-domain-card {
    position: relative;
    background: #ffffff;
    border: 1px solid #e6e6e6;
    border-radius: 18px;
    padding: 30px 30px 28px;
    box-shadow: 0 8px 25px rgba(20, 20, 50, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    border-left: 5px solid #F57C00;
}

.mp-domain-card:hover {
    transform: translateY(-4px);
    border-color: #F57C00;
    box-shadow: 0 14px 32px rgba(20, 20, 50, 0.10);
}

/* ==========================================================
   EN-TÊTE DES CARTES
   ========================================================== */

.mp-domain-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 24px;
}

.mp-domain-number {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #F57C00;
    color: #ffffff;
    border-radius: 50%;
    font-size: 13px;
    font-weight: 700;
}

.mp-domain-header h3 {
    margin: 0;
    color: #1a1a1a;
    font-size: 20px;
    line-height: 1.25;
    font-weight: 700;
}

/* ==========================================================
   LISTE DES NOTIONS
   ========================================================== */

.mp-domain-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.mp-domain-card li {
    border-top: 1px solid #eeeeee;
}

.mp-domain-card li:first-child {
    border-top: none;
}

.mp-domain-card li a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    padding: 11px 2px;
    color: #1a1a1a;
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    transition: color 0.25s ease, padding-left 0.25s ease;
}

.mp-domain-card li a i {
    color: #1a1a1a;
    font-size: 11px;
    transition: transform 0.25s ease, color 0.25s ease;
}

.mp-domain-card li a:hover {
    color: #F57C00;
    padding-left: 6px;
}

.mp-domain-card li a:hover i {
    color: #F57C00;
    transform: translateX(4px);
}

/* ==========================================================
   CARTE GRANDE (sur 2 colonnes)
   ========================================================== */

.mp-domain-large {
    grid-column: span 2;
}

/* ==========================================================
   DEUXIÈME PARTIE — APPROFONDISSEMENTS
   ========================================================== */

.mp-advanced {
    background: #f5f5fa;
}

.mp-advanced .mp-domain-card {
    background: #ffffff;
}

/* ==========================================================
   FOOTER
   ========================================================== */

.math-footer {
    background: #19182f;
    color: #ffffff;
    padding: 28px 20px;
    text-align: center;
}

.math-footer p {
    margin: 0;
    font-size: 11px;
    font-weight: 400;
}

/* ==========================================================
   RESPONSIVE
   ========================================================== */

@media (max-width: 1024px) {
    .nav-menu li a {
        font-size: 12px;
        padding: 8px 10px;
    }
}

@media (max-width: 900px) {
    .nav-container {
        height: 60px;
        position: relative;
    }

    .nav-menu {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        border-bottom: 2px solid #F57C00;
        display: none;
        width: 100%;
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu li a {
        width: 100%;
        text-align: center;
        padding: 12px 16px;
        font-size: 14px;
        white-space: normal;
    }

    .nav-menu li a.active::after {
        display: none;
    }

    /* Menu hamburger */
    .navbar .hamburger {
        display: block !important;
        color: #1a1a1a;
        font-size: 24px;
        cursor: pointer;
        padding: 10px;
    }

    .mp-hero {
        padding: 60px 20px 65px;
    }

    .mp-hero h1 {
        font-size: 36px;
    }

    .mp-domain-grid {
        grid-template-columns: 1fr;
    }

    .mp-domain-large {
        grid-column: span 1;
    }
}

@media (max-width: 600px) {
    .top-bar {
        display: none;
    }

    .logo a {
        font-size: 16px;
    }

    .nav-container {
        height: 55px;
    }

    .nav-menu {
        top: 55px;
    }

    .mp-hero {
        padding: 50px 17px 55px;
    }

    .mp-kicker {
        font-size: 10px;
    }

    .mp-hero h1 {
        font-size: 30px;
    }

    .mp-hero p {
        font-size: 13px;
        line-height: 1.7;
    }

    .mp-program {
        padding: 55px 17px 60px;
    }

    .mp-section-heading {
        margin-bottom: 32px;
    }

    .mp-section-heading h2 {
        font-size: 25px;
    }

    .mp-domain-card {
        padding: 24px 20px;
        border-radius: 15px;
    }

    .mp-domain-header {
        gap: 12px;
        margin-bottom: 20px;
    }

    .mp-domain-number {
        width: 38px;
        height: 38px;
        font-size: 12px;
    }

    .mp-domain-header h3 {
        font-size: 17px;
    }

    .mp-domain-card li a {
        font-size: 13px;
        padding: 10px 2px;
    }
}