/* ==========================================================================
   Timeline
   ========================================================================== */

#history {
    height: 500vh;
    position: relative;
    z-index: 20;
    margin-top: -100vh;
    background: var(--section-background-gradient);
    color: #fff;
}

.timeline-stage {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: hidden;
    z-index: 10;
}

.timeline-stage-inner {
    opacity: 0;
    transform: scale(0.95);
    will-change: transform, opacity;
}


/* ----- Base (mobile) ----- */
.timeline-intro {
    position: absolute;
    top: 42px;
    left: 50%;
    width: 80%;
    transform: translateX(-50%);
    color: #fff;
    text-align: center;
    font-weight: 500;
    line-height: 1.4;
    font-size: 3.5vw;
    z-index: 5;
    pointer-events: none;
}

.timeline-intro h2 {
    color: #fff;
    font-size: 6vw;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 0.5rem;
    line-height: 1.05;
}

.timeline-intro h2 .accent {
    color: var(--color-orange, #FF9900);
}

.timeline-intro p {
    font-size: 3.5vw;
    margin-top: 10px;
    color: rgba(255, 255, 255, 0.85);
}

.timeline-intro .eyebrow {
    color: var(--color-orange, #FF9900);
    font-size: 2.5vw;
    letter-spacing: 0.05em;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.timeline-wrap-outer {
    pointer-events: none;
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse farthest-corner at center,
            rgba(23, 27, 65, 0.75) 0%,
            rgba(23, 27, 65, 0) 80%);
}

.timeline-center-dot {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50vh;
    height: 50vh;
    max-width: 50vw;
    z-index: 2;
    /* behind the text */
    pointer-events: none;
    animation: rotateDot 80s linear infinite;
}

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

    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.tunnel-circle {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-origin: center center;
    will-change: transform, opacity;
}

.outer-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    transform: translate(-50%, -50%);
    opacity: 0.25;
    /* Reduced from 0.5 to make it fade more into the background */
}

.inner-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 50%;
    height: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.15;
    /* Reduced from 0.3 */
    animation: rotateDotCounter 40s linear infinite;
}

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

    100% {
        transform: translate(-50%, -50%) rotate(-360deg);
    }
}

.particles-layer {
    position: absolute;
    inset: -100%;
    /* Spread particles in a 3x3 grid around the center */
    width: 300%;
    height: 300%;
    pointer-events: none;
}

.floating-dot {
    position: absolute;
    border-radius: 50%;
    animation: floatParticle 4s ease-in-out infinite alternate;
}

@keyframes floatParticle {
    0% {
        transform: translateY(0) scale(1);
    }

    100% {
        transform: translateY(-15px) scale(1.3);
    }
}

.timeline-wrap {
    position: absolute;
    inset: 0;
}

.timelinecircle-wrap {
    position: absolute;
    width: 130vw;
    height: 100%;
    top: 0;
    bottom: 0;
    left: -40%;
    display: flex;
    align-items: center;
    z-index: 3;
    transform: translateY(10%);
}

.timelinecircle {
    position: relative;
    display: grid;
    place-items: center stretch;
    width: 100%;
    transform: rotate(0deg);
    transform-origin: 0% 50%;
    will-change: transform;
    user-select: none;
}

.timelinecircle::before,
.timelinecircle::after,
.timelinecircle-bigdots {
    content: "";
    display: block;
    pointer-events: none;
    position: absolute;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100% 100%;
    top: 50%;
    right: 0;
    width: 260vw;
    height: 260vw;
    transform-origin: center;
}

.timelinecircle::before {
    background-image: url('../icons/circle-dots.svg');
    transform: translate(0, -50%) scale(0.53);
    opacity: 0.68;
}

.timelinecircle::after {
    background-image: url('../icons/circle-dots-2.svg');
    transform: translate(0, -50%) scale(0.545);
    opacity: 0.85;
}

.timelinecircle-bigdots {
    background-image: url('../icons/circle-dots-3.svg');
    transform: translate(0, -50%) scale(0.57);
}

.year-wrap {
    transform-origin: 0% 50%;
    padding-left: 60%;
    position: relative;
    grid-area: 1 / 1;
    opacity: 0;
    pointer-events: none;
    transition: 0.5s cubic-bezier(0.65, 0, 0.35, 1);
    will-change: opacity;
    user-select: none;
}

.year-wrap.active {
    opacity: 1;
    pointer-events: auto;
}

.year-wrap.nearby {
    opacity: 0.2;
    pointer-events: auto;
}

.year-wrap.far {
    opacity: 0.05;
    pointer-events: auto;
}

.year-number {
    position: absolute;
    right: 50%;
    color: #fff;
    line-height: 1;
    font-size: clamp(24px, 6vw, 42px);
    font-weight: 700;
    top: 50%;
    text-align: right;
    transform: translate(-20%, -50%);
    transition: 0.5s cubic-bezier(0.65, 0, 0.35, 1);
    will-change: transform;
    user-select: none;
    letter-spacing: -0.02em;
    font-feature-settings: 'tnum';
    white-space: nowrap;
}

.year-wrap.active .year-number {
    transform: translate(0%, -50%);
}

.year-content {
    color: #fff;
    font-size: clamp(14px, 3vw, 18px);
    line-height: 1.45;
    position: relative;
    max-width: 50vw;
}

.year-content::before {
    content: "";
    position: absolute;
    top: 50%;
    right: 107.5%;
    transform: translateY(-50%);
    width: 2vw;
    height: 2vw;
    display: block;
    background: var(--color-orange, #FF9900);
    transition: 0.5s cubic-bezier(0.65, 0, 0.35, 1);
    opacity: 0;
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(255, 153, 0, 0.18), 0 0 24px rgba(255, 153, 0, 0.5);
}

.year-wrap.active .year-content::before {
    opacity: 1;
}

.timeline-images {
    display: none;
}

/* ----- Desktop @media (min-width: 1000px) ----- */
@media (min-width: 1000px) {
    .timeline-intro {
        position: absolute;
        top: auto;
        bottom: 54vh;
        left: 11%;
        width: 22vw;
        text-align: left;
        transform: none;
        font-size: 1vw;
    }

    .timeline-intro h2 {
        font-size: 3vw;
        line-height: 1.05;
        margin: 0 0 0.75rem;
    }

    .timeline-intro p {
        font-size: 1vw;
        margin-top: 0.5rem;
    }

    .timeline-intro .eyebrow {
        font-size: 0.75rem;
    }

    .timelinecircle-wrap {
        width: 70vw;
        left: 11vw;
        transform: translateY(0%);
    }

    .year-number {
        font-size: 2.2vw;
        right: 50%;
    }

    .year-content {
        font-size: 1.4vw;
        max-width: 28vw;
    }

    .timelinecircle::before,
    .timelinecircle::after,
    .timelinecircle-bigdots {
        width: 140vw;
        height: 140vw;
    }

    .year-content::before {
        width: 1.1vw;
        height: 1.1vw;
        right: 107.25%;
    }

    .timeline-images {
        position: absolute;
        top: 52vh;
        left: 11%;
        pointer-events: auto;
        display: block;
        z-index: 10;
    }

    .year-image {
        position: absolute;
        top: 0;
        left: 0;
        width: 14vw;
        aspect-ratio: 4 / 3;
        pointer-events: none;
        display: grid;
        place-items: center;
        border-radius: 10px;
        transition: opacity 0.5s cubic-bezier(0.65, 0, 0.35, 1);
        opacity: 0;
        will-change: opacity;
        background: linear-gradient(135deg, var(--hue1, #0a1929) 0%, var(--hue2, #146EB4) 100%);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        overflow: hidden;
    }

    .year-image.active {
        opacity: 1;
        pointer-events: auto;
    }

    .year-image img {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        z-index: 1;
        transition: opacity 0.5s ease;
        cursor: pointer;
    }

    .year-image .img-year {
        font-size: 2vw;
        font-weight: 800;
        color: rgba(255, 255, 255, 0.6);
        letter-spacing: -0.02em;
        position: relative;
        z-index: 2;
        text-shadow: 0 2px 10px rgba(0,0,0,0.5);
    }
}

/* ----- Tablet Landscape Specific Tweaks ----- */
@media (min-width: 1000px) and (max-width: 1024px) {
    .timelinecircle-wrap {
        width: 110vw;
        left: -10vw;
    }

    .timelinecircle::before,
    .timelinecircle::after,
    .timelinecircle-bigdots {
        width: 220vw;
        height: 220vw;
    }

    .year-content::before {
        right: 112.5%;
        /* Adjusted to align perfectly with the scaled white dot */
    }
}

/* ----- Mobile Specific Tweaks ----- */
@media (max-width: 767px) {
    .timelinecircle-wrap {
        width: 200vw;
        left: -80vw;
    }

    .timeline-intro {
        position: absolute;
        top: 75px;
    }

    .timelinecircle::before,
    .timelinecircle::after,
    .timelinecircle-bigdots {
        width: 400vw;
        height: 400vw;
    }

    .year-number {
        right: 48%;
    }

    .year-content {
        max-width: 55vw;
    }

    .year-content::before {
        width: 3.5vw;
        height: 3.5vw;
        right: 110.2%;
    }
}