@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;500;700&display=swap");


.timeline-ul {
    --col-gap            : 2rem;
    --row-gap            : 2rem;
    --line-w             : 0.25rem;
    display              : grid;
    grid-template-columns: var(--line-w) 1fr;
    grid-auto-columns    : max-content;
    column-gap           : var(--col-gap);
    list-style           : none;
    width                : min(60rem, 90%);
    margin-inline        : auto;
}

/* line */
.timeline-ul::before {
    content      : "";
    grid-column  : 1;
    grid-row     : 1 / span 20;
    background   : rgb(225, 225, 225);
    border-radius: calc(var(--line-w) / 2);
}

/* columns*/

/* row gaps */
.timeline-ul li:not(:last-child) {
    margin-bottom: var(--row-gap);
}

/* card */
.timeline-ul li {
    grid-column       : 2;
    --inlineP         : 1.5rem;
    margin-inline     : var(--inlineP);
    grid-row          : span 2;
    display           : grid;
    grid-template-rows: min-content min-content min-content;
    /* box-shadow        : rgba(0, 0, 0, 0.1) 0px 10px 15px -3px,
        rgba(0, 0, 0, 0.05) 0px 4px 6px -2px; */
    border-radius: 20px
}

/* date */
.timeline-ul li .date {
    --dateH      : 3rem;
    height       : var(--dateH);
    margin-inline: calc(var(--inlineP) * -1);

    text-align      : center;
    background-color: var(--accent-color);

    color      : white;
    font-size  : 1.25rem;
    font-weight: 700;

    display      : grid;
    place-content: center;
    position     : relative;

    border-radius: calc(var(--dateH) / 2) 0 0 calc(var(--dateH) / 2);
}

/* date flap */
.timeline-ul li .date::before {
    content         : "";
    width           : var(--inlineP);
    aspect-ratio    : 1;
    background      : var(--accent-color);
    background-image: linear-gradient(rgba(0, 0, 0, 0.2) 100%, transparent);
    position        : absolute;
    top             : 100%;

    clip-path: polygon(0 0, 100% 0, 0 100%);
    right    : 0;
}

/* circle */
.timeline-ul li .date::after {
    content      : "";
    position     : absolute;
    width        : 2rem;
    aspect-ratio : 1;
    background   : var(--bgColor);
    border       : 0.3rem solid var(--accent-color);
    border-radius: 50%;
    top          : 50%;
    transform    : translate(50%, -50%);
    right        : calc(105.5% + var(--col-gap) + var(--line-w) / 2);
}

/* title descr */
.timeline-ul li .title,
.timeline-ul li .descr {
    background    : var(--bgColor);
    position      : relative;
    padding-inline: 1.5rem;
}

.timeline-ul li .title {
    overflow           : hidden;
    padding-block-start: 1.5rem;
    padding-block-end  : 1rem;
    font-weight        : 500;
}

.timeline-ul li .descr {
    padding-block-end: 1.5rem;
    font-weight      : 300;
}

/* shadows */
.timeline-ul li .title::before {
    content      : "";
    position     : absolute;
    width        : 90%;
    height       : 0.5rem;
    background   : rgba(0, 0, 0, 0.5);
    left         : 50%;
    border-radius: 50%;
    filter       : blur(4px);
    transform    : translate(-50%, 50%);
}

.timeline-ul li .title::before {
    bottom: calc(100% + 0.125rem);
}

.timeline-ul li .descr::before {
    z-index: -1;
    bottom : 0.25rem;
}

@media (min-width: 40rem) {
    .timeline-ul {
        grid-template-columns: 1fr var(--line-w) 1fr;
    }

    .timeline-ul::before {
        grid-column: 2;
    }

    .timeline-ul li:nth-child(odd) {
        grid-column: 1;
    }

    .timeline-ul li:nth-child(even) {
        grid-column: 3;
    }

    /* start second card */
    .timeline-ul li:nth-child(2) {
        grid-row: 2/4;
    }

    .timeline-ul li:nth-child(odd) .date::before {
        clip-path: polygon(0 0, 100% 0, 100% 100%);
        left     : 0;
    }

    .timeline-ul li:nth-child(odd) .date::after {
        transform: translate(-50%, -50%);
        left     : calc(100% + var(--col-gap) + var(--line-w) / 2);
    }

    .timeline-ul li:nth-child(odd) .date {
        border-radius: 0 calc(var(--dateH) / 2) calc(var(--dateH) / 2) 0;
    }
}

.timeline-ul li::before {
    content: "" !important;
}

.credits {
    margin-top: 1rem;
    text-align: right;
}

.credits a {
    color: var(--color);
}