.section-multidisciplinarity {
    width: 100%;
    padding: 80px 5%;
    background-color: #08041a;
    background-image:
        radial-gradient(ellipse 55% 40% at 20% 70%, rgba(100, 20, 140, 0.22) 0%, transparent 70%),
        radial-gradient(ellipse 45% 50% at 80% 30%, rgba(255, 80, 240, 0.09) 0%, transparent 60%);
    position: relative;
    overflow: hidden;
    clip-path: polygon(0 60px, 100% 0, 100% calc(100% - 60px), 0 100%);
    margin-top: -60px;
    padding-bottom: calc(80px + 60px);
}

/* Starfield */
.section-multidisciplinarity::before {
    content: '';
    position: absolute;
    width: 1px;
    height: 1px;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 0;
    box-shadow:
        5px 45px 0 rgba(255,255,255,0.7),
        48px 180px 0 rgba(255,255,255,0.5),
        92px 620px 0 rgba(255,255,255,0.6),
        137px 310px 0 rgba(255,255,255,0.8),
        183px 750px 0 rgba(255,255,255,0.4),
        228px 130px 0 rgba(255,255,255,0.7),
        275px 540px 0 rgba(255,255,255,0.5),
        321px 90px 0 rgba(255,255,255,0.9),
        367px 420px 0 rgba(255,255,255,0.6),
        412px 690px 0 rgba(255,255,255,0.5),
        458px 255px 0 rgba(255,255,255,0.7),
        503px 580px 0 rgba(255,255,255,0.4),
        549px 380px 0 rgba(255,255,255,0.8),
        595px 720px 0 rgba(255,255,255,0.5),
        640px 170px 0 rgba(255,255,255,0.6),
        686px 470px 0 rgba(255,255,255,0.7),
        732px 620px 0 rgba(255,255,255,0.5),
        778px 300px 0 rgba(255,255,255,0.8),
        823px 55px 0 rgba(255,255,255,0.6),
        869px 490px 0 rgba(255,255,255,0.7),
        915px 750px 0 rgba(255,255,255,0.4),
        960px 235px 0 rgba(255,255,255,0.5),
        1006px 560px 0 rgba(255,255,255,0.7),
        1052px 120px 0 rgba(255,255,255,0.6),
        1097px 400px 0 rgba(255,255,255,0.8),
        1143px 680px 0 rgba(255,255,255,0.5),
        1188px 280px 0 rgba(255,255,255,0.7),
        1234px 510px 0 rgba(255,255,255,0.4),
        1280px 780px 0 rgba(255,255,255,0.6),
        1326px 340px 0 rgba(255,255,255,0.5),
        25px 320px 0 rgba(200,180,255,0.5),
        70px 680px 0 rgba(255,200,255,0.4),
        115px 140px 0 rgba(200,180,255,0.6),
        160px 510px 0 rgba(255,200,255,0.5),
        205px 770px 0 rgba(200,180,255,0.4),
        250px 360px 0 rgba(200,180,255,0.6),
        295px 650px 0 rgba(255,200,255,0.4),
        340px 210px 0 rgba(200,180,255,0.5),
        385px 490px 0 rgba(255,200,255,0.6),
        430px 810px 0 rgba(200,180,255,0.4),
        475px 340px 0 rgba(255,200,255,0.5),
        520px 620px 0 rgba(200,180,255,0.6),
        565px 160px 0 rgba(255,200,255,0.4),
        610px 430px 0 rgba(200,180,255,0.5),
        655px 760px 0 rgba(255,200,255,0.6),
        700px 280px 0 rgba(200,180,255,0.4),
        745px 520px 0 rgba(255,200,255,0.5),
        790px 390px 0 rgba(200,180,255,0.7),
        835px 700px 0 rgba(255,200,255,0.4),
        880px 120px 0 rgba(200,180,255,0.5),
        925px 460px 0 rgba(255,200,255,0.6),
        970px 800px 0 rgba(200,180,255,0.4),
        1015px 330px 0 rgba(255,200,255,0.5),
        1060px 590px 0 rgba(200,180,255,0.6),
        1105px 170px 0 rgba(255,200,255,0.4),
        1150px 440px 0 rgba(200,180,255,0.5),
        1195px 720px 0 rgba(255,200,255,0.6),
        1240px 250px 0 rgba(200,180,255,0.4),
        1285px 570px 0 rgba(255,200,255,0.5),
        1330px 90px 0 rgba(200,180,255,0.6);
}

.multidisciplinarity-container {
    max-width: 1352px;
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 1;
}

.multidisciplinarity-container h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 15px;
    font-family: var(--font-title);
    border-left: 4px solid #FF84F7;
    padding-left: 20px;
    color: white;
}

.multidisciplinarity-container .subtitle {
    font-family: 'Poppins', sans-serif;
    font-size: 16px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 50px;
    padding-left: 24px;
    line-height: 1.5;
}

.solar-system {
    position: relative;
    width: 700px;
    height: 700px;
    margin: 0 auto 50px auto;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.solar-system.shifted {
    margin: 0 auto 50px 0;
    transform: translateX(-50px);
}

.center-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 180px;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.center-circle img {
    width: 180px;
    height: 180px;
    object-fit: contain;
    animation: float 3s ease-in-out infinite;
}

.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid rgba(255, 132, 247, 0.3);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
    pointer-events: none;
    box-shadow: 0 0 12px rgba(255, 132, 247, 0.1), inset 0 0 12px rgba(255, 132, 247, 0.05);
}

.orbit-1 { border-color: rgba(255, 132, 247, 0.5); }
.orbit-2 { border-color: rgba(255, 132, 247, 0.38); }
.orbit-3 { border-color: rgba(255, 132, 247, 0.27); }
.orbit-4 { border-color: rgba(255, 132, 247, 0.18); }


.orbit-1 {
    width: 300px;
    height: 300px;
    animation-duration: 15s;
}

.orbit-2 {
    width: 420px;
    height: 420px;
    animation-duration: 20s;
}

.orbit-3 {
    width: 540px;
    height: 540px;
    animation-duration: 25s;
}

.orbit-4 {
    width: 660px;
    height: 660px;
    animation-duration: 30s;
}

@keyframes rotate {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

@keyframes counter-rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(-360deg);
    }
}

/* Orbit 1 animations */
@keyframes counter-rotate-planet-1 {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(-360deg); }
}

@keyframes counter-rotate-planet-2 {
    from { transform: translate(-50%, 50%) rotate(0deg); }
    to { transform: translate(-50%, 50%) rotate(-360deg); }
}

/* Orbit 2 animations */
@keyframes counter-rotate-planet-right {
    from { transform: translate(50%, -50%) rotate(0deg); }
    to { transform: translate(50%, -50%) rotate(-360deg); }
}

/* Orbit 3 animations */
@keyframes counter-rotate-planet-left {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(-360deg); }
}

@keyframes counter-rotate-planet-right-3 {
    from { transform: translate(50%, -50%) rotate(0deg); }
    to { transform: translate(50%, -50%) rotate(-360deg); }
}

/* Orbit 4 animations */
@keyframes counter-rotate-planet-bottom {
    from { transform: translate(-50%, 50%) rotate(0deg); }
    to { transform: translate(-50%, 50%) rotate(-360deg); }
}

.planet {
    position: absolute;
    width: 60px;
    height: 60px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    pointer-events: auto;
}

.planet.visited {
    background: linear-gradient(135deg, #d4f5d8, #86e892);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.5), 0 0 12px rgba(100, 220, 100, 0.4);
}

.planet.active {
    background: linear-gradient(135deg, #FFE5FD, #FFB8FA);
    box-shadow: 0 8px 25px rgba(255, 132, 247, 0.6);
}

/* Orbit 1 - 2 planètes */
.orbit-1 .planet.planet-1 {
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%) rotate(0deg);
    animation: counter-rotate-planet-1 15s linear infinite;
}

.orbit-1 .planet.planet-2 {
    bottom: 0;
    left: 50%;
    transform: translate(-50%, 50%) rotate(0deg);
    animation: counter-rotate-planet-2 15s linear infinite;
}

/* Orbit 2 - 1 planète */
.orbit-2 .planet {
    top: 50%;
    right: 0;
    transform: translate(50%, -50%) rotate(0deg);
    animation: counter-rotate-planet-right 20s linear infinite;
}

/* Orbit 3 - 2 planètes */
.orbit-3 .planet.planet-1 {
    top: 50%;
    left: 0;
    transform: translate(-50%, -50%) rotate(0deg);
    animation: counter-rotate-planet-left 25s linear infinite;
}

.orbit-3 .planet.planet-2 {
    top: 50%;
    right: 0;
    transform: translate(50%, -50%) rotate(0deg);
    animation: counter-rotate-planet-right-3 25s linear infinite;
}

/* Orbit 4 - 1 planète */
.orbit-4 .planet {
    bottom: 0;
    left: 50%;
    transform: translate(-50%, 50%) rotate(0deg);
    animation: counter-rotate-planet-bottom 30s linear infinite;
}

/* Scale effects for hover and active */
.planet:hover img,
.planet.active img {
    transform: scale(1.2);
    transition: transform 0.3s ease;
}

.planet img {
    transition: transform 0.3s ease;
}

.planet img {
    width: 35px;
    height: 35px;
    object-fit: contain;
    pointer-events: none;
}

.skill-description {
    position: absolute;
    top: 50%;
    right: -550px;
    transform: translateY(-50%);
    text-align: left;
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    width: 350px;
    z-index: 20;
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.skill-description.active {
    opacity: 1;
}

.skill-description::before {
    content: '';
    position: absolute;
    left: -200px;
    top: 50%;
    transform: translateY(-50%);
    width: 200px;
    height: 2px;
    background: #FFB8FA;
}

.arrow {
    display: none;
}

.skill-description h3 {
    font-size: 24px;
    font-weight: 700;
    color: #FFB8FA;
    font-family: 'Pixelify Sans';
    margin-bottom: 10px;
}

.skill-description p {
    font-size: 16px;
    line-height: 1.6;
    color: #666;
    font-family: var(--font-pgs);
}

/* ============================================ */
/* RESPONSIVE TABLETTE (768px - 1024px) */
/* ============================================ */

@media (max-width: 1024px) {
    .section-multidisciplinarity {
        padding: 60px 4%;
    }

    .multidisciplinarity-container h2 {
        font-size: 28px;
        margin-bottom: 12px;
    }

    .multidisciplinarity-container .subtitle {
        font-size: 15px;
        margin-bottom: 40px;
    }

    .solar-system {
        width: 600px;
        height: 600px;
        margin: 0 auto 180px auto;
    }

    .solar-system.shifted {
        margin: 0 auto 180px 0;
        transform: translateX(-30px);
    }

    .center-circle {
        width: 120px;
        height: 120px;
    }

    .center-circle img {
        width: 120px;
        height: 120px;
    }

    .orbit-1 {
        width: 250px;
        height: 250px;
    }

    .orbit-2 {
        width: 350px;
        height: 350px;
    }

    .orbit-3 {
        width: 450px;
        height: 450px;
    }

    .orbit-4 {
        width: 550px;
        height: 550px;
    }

    .planet {
        width: 50px;
        height: 50px;
    }

    .planet img {
        width: 30px;
        height: 30px;
    }

    .skill-description h3 {
        font-size: 20px;
    }

    .skill-description p {
        font-size: 15px;
    }
}

/* ============================================ */
/* RESPONSIVE MOBILE (max-width: 768px) */
/* ============================================ */

@media (max-width: 768px) {
    .section-multidisciplinarity {
        /* padding-top élevé pour compenser le clip-path diagonal qui coupe ~57px côté gauche */
        padding: 75px 20px 40px;
    }

    .multidisciplinarity-container h2 {
        font-size: 24px;
        margin-bottom: 10px;
        padding-left: 15px;
        border-left-width: 3px;
    }

    .multidisciplinarity-container .subtitle {
        font-size: 14px;
        margin-bottom: 30px;
        padding-left: 18px;
    }

    .solar-system {
        width: 450px;
        height: 450px;
        margin: 0 auto 120px auto;
    }

    .solar-system.shifted {
        margin: 0 auto 120px auto;
        transform: none;
    }

    .center-circle {
        width: 130px;
        height: 130px;
    }

    .center-circle img {
        width: 130px;
        height: 130px;
    }

    .orbit-1 {
        width: 200px;
        height: 200px;
    }

    .orbit-2 {
        width: 270px;
        height: 270px;
    }

    .orbit-3 {
        width: 340px;
        height: 340px;
    }

    .orbit-4 {
        width: 410px;
        height: 410px;
    }

    .planet {
        width: 55px;
        height: 55px;
    }

    .planet img {
        width: 32px;
        height: 32px;
    }

    .skill-description {
        position: absolute;
        top: auto;
        bottom: -250px;
        left: 50%;
        right: auto;
        transform: translateX(-50%);
        max-width: 300px;
        width: 90%;
    }

    .skill-description::before {
        display: none;
    }

    .skill-description h3 {
        font-size: 20px;
    }

    .skill-description p {
        font-size: 15px;
    }
}

/* ============================================ */
/* RESPONSIVE SMALL MOBILE (max-width: 480px) */
/* ============================================ */

@media (max-width: 480px) {
    .section-multidisciplinarity {
        /* même compensation : clip ~54px à x=35px sur écran 320px */
        padding: 75px 15px 30px;
    }

    .multidisciplinarity-container h2 {
        font-size: 20px;
        margin-bottom: 8px;
        padding-left: 12px;
    }

    .multidisciplinarity-container .subtitle {
        font-size: 13px;
        margin-bottom: 25px;
        padding-left: 15px;
    }

    .solar-system {
        width: 380px;
        height: 380px;
        margin: 0 auto 120px auto;
    }

    .solar-system.shifted {
        margin: 0 auto 120px auto;
        transform: none;
    }

    .center-circle {
        width: 110px;
        height: 110px;
    }

    .center-circle img {
        width: 110px;
        height: 110px;
    }

    .orbit-1 {
        width: 160px;
        height: 160px;
    }

    .orbit-2 {
        width: 215px;
        height: 215px;
    }

    .orbit-3 {
        width: 270px;
        height: 270px;
    }

    .orbit-4 {
        width: 325px;
        height: 325px;
    }

    .planet {
        width: 50px;
        height: 50px;
    }

    .planet img {
        width: 28px;
        height: 28px;
    }

    .skill-description {
        position: absolute;
        top: auto;
        bottom: -270px;
        left: 50%;
        right: auto;
        transform: translateX(-50%);
        max-width: 260px;
        width: 90%;
    }

    .skill-description::before {
        display: none;
    }

    .skill-description h3 {
        font-size: 18px;
    }

    .skill-description p {
        font-size: 14px;
    }
}

/* ============================================ */
/* COSMIC CORE                                  */
/* ============================================ */

.cosmic-core {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Outer soft nebula halo */
.core-halo {
    position: absolute;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: radial-gradient(circle,
        rgba(255, 220, 255, 0.12) 0%,
        rgba(255, 132, 247, 0.22) 30%,
        rgba(160, 40, 200, 0.08) 60%,
        transparent 75%
    );
    box-shadow:
        0 0 30px rgba(255, 132, 247, 0.45),
        0 0 60px rgba(255, 132, 247, 0.2),
        0 0 100px rgba(160, 40, 200, 0.12);
    animation: corePulse 4s ease-in-out infinite;
}

/* Middle ring */
.core-mid {
    position: absolute;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    border: 1px solid rgba(255, 184, 250, 0.55);
    box-shadow:
        0 0 10px rgba(255, 132, 247, 0.4),
        inset 0 0 10px rgba(255, 132, 247, 0.15);
    animation: corePulse 4s ease-in-out infinite 0.6s;
}

/* Bright center star */
.core-body {
    position: absolute;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: radial-gradient(circle, #ffffff 0%, #ffe6ff 50%, #FFB8FA 100%);
    box-shadow:
        0 0 12px rgba(255, 255, 255, 0.95),
        0 0 28px rgba(255, 132, 247, 0.75),
        0 0 55px rgba(255, 132, 247, 0.4);
    animation: coreGlow 4s ease-in-out infinite;
}

@keyframes corePulse {
    0%, 100% { transform: scale(1); opacity: 0.9; }
    50%       { transform: scale(1.18); opacity: 1; }
}

@keyframes coreGlow {
    0%, 100% {
        box-shadow:
            0 0 12px rgba(255,255,255,0.95),
            0 0 28px rgba(255,132,247,0.75),
            0 0 55px rgba(255,132,247,0.4);
    }
    50% {
        box-shadow:
            0 0 18px rgba(255,255,255,1),
            0 0 40px rgba(255,132,247,0.9),
            0 0 80px rgba(255,132,247,0.55);
    }
}

/* Planet adjustments for dark background */
.planet {
    background: linear-gradient(135deg, rgba(255, 248, 255, 0.96), rgba(235, 210, 255, 0.88));
    border: 1px solid rgba(255, 132, 247, 0.35);
    box-shadow:
        0 4px 16px rgba(0, 0, 0, 0.5),
        0 0 12px rgba(255, 132, 247, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.planet.visited {
    background: linear-gradient(135deg, #c8f5cc, #72e882);
    border-color: rgba(80, 200, 90, 0.5);
    box-shadow:
        0 4px 15px rgba(0, 0, 0, 0.4),
        0 0 14px rgba(80, 220, 100, 0.45);
}

.planet.active {
    background: linear-gradient(135deg, #FFE5FD, #FFB8FA);
    border-color: rgba(255, 132, 247, 0.7);
    box-shadow:
        0 8px 25px rgba(255, 132, 247, 0.65),
        0 0 20px rgba(255, 132, 247, 0.4);
}

/* ============================================ */
/* INTRO ANIMATION - SCROLL REVEAL              */
/* ============================================ */

/* ── Fond : étoiles + nébuleuse ── */

/* Étoiles : flou → net en fondu */
.section-multidisciplinarity::before {
    opacity: 0;
    filter: blur(4px);
    transition: opacity 2.2s ease 0.05s, filter 2s ease 0.05s;
}
.section-multidisciplinarity.revealed::before {
    opacity: 1;
    filter: blur(0);
}

/* Nébuleuse : overlay rose-violet qui apparaît après les étoiles */
.section-multidisciplinarity::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(ellipse 65% 50% at 15% 75%, rgba(130, 25, 180, 0.38) 0%, transparent 65%),
        radial-gradient(ellipse 50% 60% at 85% 25%, rgba(255, 80, 240, 0.16) 0%, transparent 55%);
    opacity: 0;
    pointer-events: none;
    z-index: 0;
    transition: opacity 2.8s ease 0.8s;
}
.section-multidisciplinarity.revealed::after {
    opacity: 1;
}

/* ── Éléments du système solaire ── */

/* État initial : tout invisible */
.multidisciplinarity-container h2,
.multidisciplinarity-container .subtitle {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.multidisciplinarity-container .subtitle {
    transition-delay: 0.12s;
}

.cosmic-core {
    opacity: 0;
    scale: 0;
    transition: opacity 0.5s ease, scale 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.orbit {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.planet {
    opacity: 0;
    transition: opacity 0.4s ease, all 0.3s ease;
}

/* État révélé — déclenché par JS via .revealed sur .section-multidisciplinarity */
.section-multidisciplinarity.revealed .multidisciplinarity-container h2,
.section-multidisciplinarity.revealed .multidisciplinarity-container .subtitle {
    opacity: 1;
    transform: translateY(0);
}

.section-multidisciplinarity.revealed .cosmic-core {
    opacity: 1;
    scale: 1;
    transition-delay: 0.1s;
}

.section-multidisciplinarity.revealed .orbit-1 { opacity: 1; transition-delay: 0.35s; }
.section-multidisciplinarity.revealed .orbit-2 { opacity: 1; transition-delay: 0.52s; }
.section-multidisciplinarity.revealed .orbit-3 { opacity: 1; transition-delay: 0.68s; }
.section-multidisciplinarity.revealed .orbit-4 { opacity: 1; transition-delay: 0.82s; }

.section-multidisciplinarity.revealed .orbit-1 .planet:nth-child(1) { opacity: 1; transition-delay: 0.5s; }
.section-multidisciplinarity.revealed .orbit-1 .planet:nth-child(2) { opacity: 1; transition-delay: 0.6s; }
.section-multidisciplinarity.revealed .orbit-2 .planet           { opacity: 1; transition-delay: 0.7s; }
.section-multidisciplinarity.revealed .orbit-3 .planet:nth-child(1) { opacity: 1; transition-delay: 0.8s; }
.section-multidisciplinarity.revealed .orbit-3 .planet:nth-child(2) { opacity: 1; transition-delay: 0.9s; }
.section-multidisciplinarity.revealed .orbit-4 .planet           { opacity: 1; transition-delay: 1.0s; }