:root {
    --sv-tl-primary: #003d7c;
    --sv-tl-primary-hover: #002952;
    --sv-tl-primary-rgb: 0, 61, 124;
    --sv-tl-accent: #6cbe57;
    --sv-tl-accent-dark: #5ba249;
    --sv-tl-accent-rgb: 108, 190, 87;
    --sv-tl-light-green: #e6f4e2;
    --sv-tl-light-blue: #def1fb;
    --sv-tl-text: #333333;
    --sv-tl-text-secondary: #666666;
    --sv-tl-bg: #f8f8f8;
    --sv-tl-white: #ffffff;
    --sv-tl-border: #dddddd;
    --sv-tl-badge-bg: #003d7c;
    --sv-tl-badge-text: #ffffff;
}

.sv-timeline {
    position: relative;
    max-width: 750px;
    margin: 3rem auto;
    padding: 2rem 0;
}

.sv-timeline *,
.sv-timeline *::before,
.sv-timeline *::after {
    box-sizing: border-box;
}

.sv-timeline-line {
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    border-radius: 3px;
    overflow: hidden;
}

.sv-timeline-line::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(var(--sv-tl-primary-rgb), 0.1);
}

.sv-timeline-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: var(--sv-tl-line-progress, 0%);
    background: linear-gradient(
        180deg,
        var(--sv-tl-accent) 0%,
        var(--sv-tl-primary) 100%
    );
    transition: height 0.15s linear;
}

.sv-timeline-cap {
    position: absolute;
    left: 14px;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--sv-tl-accent);
    z-index: 3;
    box-shadow: 0 0 0 4px rgba(var(--sv-tl-accent-rgb), 0.2);
}

.sv-timeline-cap--start {
    top: -6px;
}

.sv-timeline-cap--end {
    bottom: -6px;
    background: var(--sv-tl-primary);
    box-shadow: 0 0 0 4px rgba(var(--sv-tl-primary-rgb), 0.2);
}

.sv-timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
    padding-left: 64px;
    opacity: 0;
    transform: translateY(50px) scale(0.97);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.sv-timeline-item.sv-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.sv-timeline-badge {
    position: absolute;
    left: 20px;
    top: 4px;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--sv-tl-primary) 0%, var(--sv-tl-primary-hover) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    box-shadow:
        0 3px 12px rgba(var(--sv-tl-primary-rgb), 0.35),
        0 0 0 3px var(--sv-tl-white),
        0 0 0 5px rgba(var(--sv-tl-primary-rgb), 0.15);
    transform: translateX(-50%) scale(0);
    transition: box-shadow 0.3s ease;
}

.sv-visible .sv-timeline-badge {
    animation: sv-badge-pop 0.5s 0.15s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes sv-badge-pop {
    0% { transform: translateX(-50%) scale(0); }
    100% { transform: translateX(-50%) scale(1); }
}

.sv-timeline-year {
    color: var(--sv-tl-badge-text);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.sv-timeline-content {
    background: var(--sv-tl-white);
    border: 1px solid var(--sv-tl-border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    position: relative;
    transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
    border-left: 3px solid var(--sv-tl-accent);
}

.sv-timeline-content:hover {
    box-shadow: 0 8px 32px rgba(var(--sv-tl-primary-rgb), 0.12);
    transform: translateY(-2px);
    border-color: var(--sv-tl-accent);
}

.sv-timeline-content::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 12px;
    width: 0;
    height: 0;
    border-top: 9px solid transparent;
    border-bottom: 9px solid transparent;
    border-right: 10px solid var(--sv-tl-accent);
}

.sv-timeline-content::after {
    content: '';
    position: absolute;
    left: -7px;
    top: 12px;
    width: 0;
    height: 0;
    border-top: 9px solid transparent;
    border-bottom: 9px solid transparent;
    border-right: 10px solid var(--sv-tl-white);
}

.sv-timeline-year-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--sv-tl-primary);
    background: var(--sv-tl-light-blue);
    padding: 2px 10px;
    border-radius: 20px;
    margin-bottom: 0.5rem;
    letter-spacing: 0.03em;
}

.sv-timeline-title {
    margin: 0 0 0.5rem;
    font-size: 1.2rem;
    color: var(--sv-tl-primary);
    font-weight: 700;
    line-height: 1.3;
}

.sv-timeline-desc {
    color: var(--sv-tl-text-secondary);
    font-size: 0.93rem;
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.sv-timeline-desc:last-child {
    margin-bottom: 0;
}

.sv-timeline-swiper {
    margin-top: 1rem;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

.sv-timeline-swiper .swiper-slide {
    width: 100%;
}

.sv-timeline-slide {
    display: block;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    text-decoration: none;
    position: relative;
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.25s ease;
}

.sv-timeline-slide::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(var(--sv-tl-primary-rgb), 0);
    transition: background 0.25s ease;
    border-radius: 8px;
    pointer-events: none;
}

.sv-timeline-slide:hover::after {
    background: rgba(var(--sv-tl-primary-rgb), 0.15);
}

.sv-timeline-slide:hover {
    transform: scale(1.03);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.sv-timeline-slide img {
    display: block;
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
}

.sv-swiper-prev,
.sv-swiper-next {
    display: none;
}

@media (hover: hover) and (pointer: fine) {
    .sv-swiper-prev,
    .sv-swiper-next {
        display: flex;
        align-items: center;
        justify-content: center;
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        z-index: 10;
        width: 30px;
        height: 30px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.9);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        cursor: pointer;
        border: none;
        padding: 0;
        opacity: 0;
        transition: opacity 0.2s ease, background 0.2s ease;
    }

    .sv-timeline-swiper:hover .sv-swiper-prev,
    .sv-timeline-swiper:hover .sv-swiper-next {
        opacity: 1;
    }

    .sv-swiper-prev:hover,
    .sv-swiper-next:hover {
        background: var(--sv-tl-white);
    }

    .sv-swiper-prev {
        left: 6px;
    }

    .sv-swiper-next {
        right: 6px;
    }

    .sv-swiper-prev svg,
    .sv-swiper-next svg {
        width: 18px;
        height: 18px;
        fill: var(--sv-tl-primary);
    }

    .sv-swiper-prev.swiper-button-disabled,
    .sv-swiper-next.swiper-button-disabled {
        opacity: 0 !important;
        pointer-events: none;
    }
}

.sv-timeline-photo-count {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--sv-tl-text-secondary);
    margin-top: 6px;
}

.sv-timeline-photo-count svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
    opacity: 0.6;
}

.sv-timeline-lightbox {
    position: fixed;
    inset: 0;
    z-index: 999999;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sv-timeline-lightbox.sv-lightbox-open {
    opacity: 1;
}

.sv-timeline-lightbox-img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

.sv-timeline-lightbox-close,
.sv-timeline-lightbox-prev,
.sv-timeline-lightbox-next {
    position: absolute;
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 2rem;
    padding: 0.5rem;
    line-height: 1;
    opacity: 0.7;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 2;
}

.sv-timeline-lightbox-close:hover,
.sv-timeline-lightbox-prev:hover,
.sv-timeline-lightbox-next:hover {
    opacity: 1;
    transform: scale(1.15);
}

.sv-timeline-lightbox-close {
    top: 1rem;
    right: 1.5rem;
    font-size: 2.5rem;
}

.sv-timeline-lightbox-prev {
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
}

.sv-timeline-lightbox-next {
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
}

.sv-timeline-lightbox-prev:hover {
    transform: translateY(-50%) scale(1.15);
}

.sv-timeline-lightbox-next:hover {
    transform: translateY(-50%) scale(1.15);
}

.sv-timeline-empty {
    text-align: center;
    color: var(--sv-tl-text-secondary);
    font-style: italic;
    padding: 4rem 1rem;
    background: var(--sv-tl-light-blue);
    border-radius: 12px;
    border: 1px dashed var(--sv-tl-border);
}

/* Desktop: alternating left/right */
@media (min-width: 768px) {

    .sv-timeline {
        max-width: 750px;
        padding: 3rem 0;
    }

    .sv-timeline-line {
        left: 50%;
        transform: translateX(-50%);
    }

    .sv-timeline-cap {
        left: calc(50% - 7px);
    }

    .sv-timeline-item {
        width: 50%;
        padding-left: 0;
        margin-bottom: 1.5rem;
    }

    .sv-timeline-year-label {
        display: none;
    }

    .sv-timeline-item--left {
        margin-left: 0;
        padding-right: 48px;
        text-align: right;
    }

    .sv-timeline-item--left .sv-timeline-badge {
        left: 100%;
    }

    .sv-timeline-item--left .sv-timeline-content {
        border-left: 1px solid var(--sv-tl-border);
        border-right: 3px solid var(--sv-tl-accent);
    }

    .sv-timeline-item--left .sv-timeline-content::before {
        left: auto;
        right: -10px;
        border-right: none;
        border-left: 10px solid var(--sv-tl-accent);
    }

    .sv-timeline-item--left .sv-timeline-content::after {
        left: auto;
        right: -7px;
        border-right: none;
        border-left: 10px solid var(--sv-tl-white);
    }

    .sv-timeline-item--left .sv-timeline-title,
    .sv-timeline-item--left .sv-timeline-desc {
        text-align: right;
    }

    .sv-timeline-item--left .sv-timeline-photo-count {
        justify-content: flex-end;
    }

    .sv-timeline-item--left {
        transform: translateX(-40px) scale(0.97);
        opacity: 0;
    }

    .sv-timeline-item--left.sv-visible {
        transform: translateX(0) scale(1);
        opacity: 1;
    }

    .sv-timeline-item--right {
        margin-left: 50%;
        padding-left: 48px;
        text-align: left;
    }

    .sv-timeline-item--right .sv-timeline-badge {
        left: 0;
    }

    .sv-timeline-item--right .sv-timeline-content::before {
        left: -10px;
        right: auto;
        border-left: none;
        border-right: 10px solid var(--sv-tl-accent);
    }

    .sv-timeline-item--right .sv-timeline-content::after {
        left: -7px;
        right: auto;
        border-left: none;
        border-right: 10px solid var(--sv-tl-white);
    }

    .sv-timeline-item--right {
        transform: translateX(40px) scale(0.97);
        opacity: 0;
    }

    .sv-timeline-item--right.sv-visible {
        transform: translateX(0) scale(1);
        opacity: 1;
    }

    .sv-timeline-badge {
        width: 52px;
        height: 52px;
        box-shadow:
            0 4px 16px rgba(var(--sv-tl-primary-rgb), 0.35),
            0 0 0 4px var(--sv-tl-white),
            0 0 0 6px rgba(var(--sv-tl-primary-rgb), 0.12);
    }

    .sv-timeline-year {
        font-size: 0.82rem;
    }

    .sv-timeline-title {
        font-size: 1.3rem;
    }

    .sv-timeline-slide img {
        height: 180px;
    }

    .sv-timeline-content {
        padding: 1.75rem;
    }
}

/* Large desktop */
@media (min-width: 1024px) {
    .sv-timeline-slide img {
        height: 200px;
    }

    .sv-timeline-badge {
        width: 56px;
        height: 56px;
    }

    .sv-timeline-year {
        font-size: 0.88rem;
    }

    .sv-timeline-item--left {
        padding-right: 56px;
    }

    .sv-timeline-item--right {
        padding-left: 56px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .sv-timeline-item {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .sv-visible .sv-timeline-badge {
        animation: none;
    }

    .sv-timeline-content,
    .sv-timeline-slide {
        transition: none;
    }
}