@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;700&display=swap");

:root {
    --white: #ffffffaf;
    --black: #323135;
    --crystal: #a8dadd;
    --columbia-blue: #cee9e4;
    --midnight-green: #01565b;

    --timeline-gradient: rgba(255, 255, 255, 255) 0%, rgba(0, 0, 0, 0) 50%,
        rgba(0, 0, 0, 0) 100%;
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

button {
    background: transparent;
    border: none;
    cursor: pointer;
    outline: none;
}

a {
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

body {
    font: normal 16px/1.5 "Inter", sans-serif;
    background: var(--columbia-blue);
    color: var(--black);
    margin-bottom: 50px;
}

/* .section SECTION
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.section {
    padding: 10px 0;
}

.section .container {
    width: 90%;
    max-width: 1500px;
    margin: 0 auto;
    text-align: center;
}

.section h1 {
    font-size: 2.5rem;
    line-height: 1.25;
}

.section h2 {
    font-size: 1.3rem;
}

/* TIMELINE
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.timeline {
    position: relative;
    white-space: nowrap;
    max-width: 1400px;
    padding: 0 10px;
    margin: 0 auto;
    display: grid;
    grid-gap: 20px;
}

.timeline ol::-webkit-scrollbar {
    height: 12px;
}

.timeline ol::-webkit-scrollbar-thumb,
.timeline ol::-webkit-scrollbar-track {
    border-radius: 92px;
}

.timeline ol::-webkit-scrollbar-thumb {
    background: var(--midnight-green);
}

.timeline ol::-webkit-scrollbar-track {
    background: var(--white);
}

.timeline ol {
    font-size: 0;
    padding: 250px 0;
    transition: all 1s;
    overflow-x: scroll;
    scroll-snap-type: x mandatory;
    scrollbar-color: var(--white) var(--midnight-green);
}

.timeline ol li {
    position: relative;
    display: inline-block;
    list-style-type: none;
    width: 160px;
    height: 5px;
    background: var(--white);
    scroll-snap-align: start;
}

.timeline ol li:last-child {
    width: 340px;
}

.timeline ol li:not(:first-child) {
    margin-left: 14px;
}

.timeline ol li:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    left: calc(100% + 1px);
    bottom: 0;
    width: 16px;
    height: 16px;
    transform: translateY(-50%);
    border-radius: 50%;
    background: var(--midnight-green);
    z-index: 1;
}

.timeline ol li div {
    position: absolute;
    left: calc(100% + 7px);
    width: 280px;
    padding: 10px;
    font-size: 1rem;
    white-space: normal;
    color: var(--black);
    background: var(--white);
    border-radius: 0 10px 10px 10px;
}

.timeline ol li div::before {
    content: "";
    position: absolute;
    top: 100%;
    left: 0;
    width: 0;
    height: 0;
    border-style: solid;
}

.timeline ol li:nth-child(odd) div {
    top: -16px;
    transform: translateY(-100%);
    border-radius: 10px 10px 10px 0;
}

.timeline ol li:nth-child(odd) div::before {
    top: 100%;
    border-width: 8px 8px 0 0;
    border-color: var(--white) transparent transparent transparent;
}

.timeline ol li:nth-child(even) div {
    top: calc(100% + 16px);
}

.timeline ol li:nth-child(even) div::before {
    top: -8px;
    border-width: 8px 0 0 8px;
    border-color: transparent transparent transparent var(--white);
}

.timeline time {
    display: block;
    font-size: 1.4rem;
    font-weight: bold;
    margin-bottom: 8px;
    color: var(--midnight-green);
}

/* GENERAL MEDIA QUERIES
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@media screen and (max-width: 800px) {
    .timeline {
        display: block;
    }

    .timeline::before,
    .timeline::after {
        width: 50px;
    }

    .timeline::before {
        left: 0;
    }

    .timeline .info {
        display: none;
    }
}

/* FOOTER STYLES
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.page-footer {
    position: fixed;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    padding: 5px;
    z-index: 2;
    color: var(--black);
    background: var(--columbia-blue);
}

.page-footer a {
    display: flex;
    margin-left: 4px;
}