:root {
    /* Couleurs principales */
    --primary-color: #2c2c2c;
    --secondary-color: #ffffff;
    --component-color: #f8f9fa;
    --bgtier-color: #e9ecef;
    --container-color: #ffffff;
    
    /* Effets glass */   
    --glass-bg: rgba(0, 0, 0, 0.05);
    --glass-border: rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

body.dark-mode {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    --primary-color: #f2ddcc;
    --secondary-color: #101524;
    --component-color: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    --bgtier-color: #12192e;
    --container-color: #0e121f;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

/* ===== TIMELINE CIRCULAIRE ===== */
.timeline-section.active {
    display: flex !important;
    flex-direction: column;
    text-align: center;
    height: 100%;
    position: relative;
}

.timeline-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* Hide radio buttons */
.timeline-content input[type="radio"] {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.cards-container {
    --base-rotation: 0deg;
    --full-circle: 360deg;
    --radius: 20vw;
    --duration: 200ms;

    --cards-container-size: calc(var(--radius) * 2);
    --cards-container-padding: 2rem;

    --border-color: transparent;

    --label-offset: calc(var(--radius) * -1 - 1rem);
    --label-size: 30px;
    --label-color: var(--primary-color);
    --label-color-hover: #4ade80;
    --label-line-h: 0;
    --label-line-h-current: 2rem;
    --label-dot-size: 10px;

    --title-top: 1.5rem;
    --title-offset-y: 30px;

    --info-top: 5rem;
    --info-width: min(70%, 400px);
    --info-offset-y: 30px;

    box-sizing: content-box;
    position: relative;
    width: var(--cards-container-size);
    height: var(--cards-container-size);
    padding: var(--cards-container-padding);
    margin: 0 auto;
}

@media (width > 600px) {
    .cards-container {
        clip-path: polygon(0 0, 100% 0, 100% 50%, 0 50%);
    }
}

@media (min-width: 800px) {
    .cards-container {
        --radius: 15vw;
        --label-size: 35px;
        --label-dot-size: 12px;
        --label-line-h-current: 3rem;
        --title-top: 3rem;
        --info-top: 7rem;
    }
}

@media (min-width: 1200px) {
    .cards-container {
        --label-size: 40px;
        --border-color: var(--glass-border);
    }
}

.cards {
    position: absolute;
    inset: var(--cards-container-padding);
    aspect-ratio: 1;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease-in-out var(--duration);
    list-style: none;
    margin: 0;
    padding: 0;
}

.cards li {
    position: absolute;
    inset: 0;
    margin: 0;
    padding: 0;
    transform-origin: center;
    display: grid;
    place-content: center;
    transform: rotate(calc(var(--i) * 360deg / var(--items)));
    pointer-events: none;
}

.cards li > label {
    position: absolute;
    inset: 0;
    margin: auto;
    transform: translateY(var(--label-offset));
    width: var(--label-size);
    height: var(--label-size);
    cursor: pointer;
    pointer-events: initial;
    text-align: center;
    color: var(--label-color);
    font-size: clamp(.8rem, 2.5vw + .04rem, 1rem);
    font-weight: 600;
    transition: var(--duration) ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

body.dark-mode .cards li > label {
    color: white;
}

.cards li > label::before {
    content: '';
    position: absolute;
    top: var(--cards-container-padding);
    left: 50%;
    translate: -50% 0;
    width: var(--label-dot-size);
    height: var(--label-dot-size);
    aspect-ratio: 1;
    border-radius: 50%;
    background-color: var(--label-color);
    transition: background-color var(--duration) ease-in-out;
}

body.dark-mode .cards li > label::before {
    background-color: white;
}

.cards li > label::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    translate: -50% 5px;
    width: 2px;
    height: var(--label-line-h);
    background-color: var(--label-color-hover);
    transition: height 300ms ease-in-out var(--label-line-delay, 0ms);
}

.cards li > label:hover {
    --label-color: var(--label-color-hover);
    transform: translateY(var(--label-offset)) scale(1.1);
    box-shadow: 0 4px 15px rgba(74, 222, 128, 0.3);
}

body.dark-mode .cards li > label:hover {
    box-shadow: 0 4px 15px rgba(74, 222, 128, 0.5);
}

.cards > li > h2,
.cards > li > p {
    position: absolute;
    left: 50%;
    text-align: center;
    transform: translate(-50%, 0);
    transform-origin: center;
}

.cards > li > h2 {
    top: var(--title-top);
    opacity: var(--title-opacity, 0);
    translate: 0 var(--title-offset-y);
    transition: var(--duration) ease-in-out var(--title-delay, 0ms);
    margin: 0;
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    color: var(--primary-color);
}

body.dark-mode .cards > li > h2 {
    color: white;
}

.cards > li > p {
    top: var(--info-top);
    margin: 0 auto;
    width: var(--info-width);
    z-index: 2;
    font-size: clamp(.8rem, 2.5vw + 0.05rem, .9rem);
    text-align: left;
    text-wrap: pretty;
    opacity: var(--info-opacity, 0);
    transition: var(--duration) ease-in-out var(--info-delay, 0ms);
    color: rgba(44, 44, 44, 0.8);
    line-height: 1.5;
}

body.dark-mode .cards > li > p {
    color: rgba(255, 255, 255, 0.8);
}

/* update custom properties for checked item */
li:has(input:checked) {
    --label-opacity: 1;
    --label-color: var(--label-color-hover);
    --label-line-h: var(--label-line-h-current);
    --label-line-delay: calc(var(--duration) * 2);

    --title-opacity: 1;
    --title-offset-y: 0;
    --title-delay: calc(var(--duration) * 3);

    --info-opacity: 1;
    --info-offset-y: 0;
    --info-delay: calc(var(--duration) * 4);
}

li:has(input:checked) > label {
    background: var(--label-color-hover) !important;
    color: white !important;
    box-shadow: 0 0 20px rgba(74, 222, 128, 0.6);
}

/* rotate container based on checked radio */
.cards:has(input:checked) {
    transform: rotate(calc(var(--base-rotation) - (var(--index) * var(--full-circle) / var(--items))));
}

/* Sélecteurs pour 8 éléments */
.cards:has(li:nth-child(1)>input:checked) { --index: 0; }
.cards:has(li:nth-child(2)>input:checked) { --index: 1; }
.cards:has(li:nth-child(3)>input:checked) { --index: 2; }
.cards:has(li:nth-child(4)>input:checked) { --index: 3; }
.cards:has(li:nth-child(5)>input:checked) { --index: 4; }
.cards:has(li:nth-child(6)>input:checked) { --index: 5; }
.cards:has(li:nth-child(7)>input:checked) { --index: 6; }
.cards:has(li:nth-child(8)>input:checked) { --index: 7; }
.cards:has(li:nth-child(9)>input:checked) { --index: 8; }