:root {
    --colour-bg: #fefeff;
    --colour-header: #eaf4fa;
    --colour-text: #111;
    --colour-uoft: #1e3765;
    --colour-link: #31579e;
    --colour-timeline: #444;
    --colour-shadow: rgba(0,0,0,0.2);
    --colour-academia: #d1ebf8;
    --colour-industry: #cdebd5;
    --colour-grade-school: #ecdebf;
    --colour-subevent: #ddd;
    --font-main: Tahoma, Arial, sans-serif;
    --font-size-small: 0.875rem;
    --font-size-smaller: 0.8rem;
    --photo-size: 14rem;
    --rounding-radius: 0.5rem;
    --max-width: 63rem;
    --timeline-width: 0.7rem;
    --timeline-stem-overrun: -2rem;
    --timeline-point-width: 1.5rem;
    --timeline-stem-padding: 0.5rem;
    --timeline-content-padding: 1rem;
    --timeline-grad-length: 4rem;
    --timeline-left-padding: min(
        21rem,
        calc(
            100vw
            - var(--timeline-width)
            - var(--timeline-stem-padding)
            - var(--timeline-point-width)
        )
    );
    --top-buffer: 5rem;
    --footer-grad-length: 6vh;
    --teaser-img-height: 15rem;
    --event-min-width: calc(var(--timeline-left-padding) - 3rem);
    --event-shift-left: min(
        0px,
        calc(
            100vw - 4rem
            - 2rem
            - var(--timeline-width)
            - var(--timeline-left-padding)
            - var(--event-min-width)
            - 2 * var(--timeline-stem-padding)
        )
    );
}

html {
    scroll-behavior: smooth;
}

html, body {
    overflow-x: clip;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--colour-bg);
    color: var(--colour-text);
    font-family: var(--font-main);
    line-height: 1.35;
}

main {
    padding-left: 20px;
    padding-right: 20px;
    box-sizing: border-box;
    animation: pageFadeIn 0.3s ease-out forwards;
}

@keyframes pageFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* General */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.container.message {
    position: absolute;
    bottom: 0;
    color: var(--colour-bg);
    pointer-events: none;
    z-index: -100;
}

/* Header */

.site-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--colour-header);
    box-shadow: 0 2px 10px var(--colour-shadow);
    padding: 1.5rem 20px 1rem;
    box-sizing: border-box;
    margin-bottom: 2rem;
    z-index: 1000;
}

.site-nav {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.25rem;
}

.nav-link {
    text-decoration: none;
    color: inherit;
    font-weight: normal;
}

.about-page .nav-link.about {
    text-shadow: 1px 0 0 currentColor, 0.5px 0 0 currentColor, 0.5px 0 0 currentColor;
}

.site-title {
    text-decoration: none;
    color: inherit;
    font-size: 1.25rem;
    font-weight: bold;
    margin-right: auto;
}

.site-icon {
    width: 1rem;
    height: 1rem;
    object-fit: contain;
}

/* Footer */

.site-footer {
    width: 100%;
    margin-top: 4rem;
    padding: 1.5rem 20px 1rem;
    box-sizing: border-box;
    font-size: var(--font-size-smaller);
    z-index: 1000;
}

.container.footer {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
}

.footer-item {
    text-decoration: none;
    color: inherit;
    opacity: 0.3;
    font-weight: normal;
}

.footer-item.left {
    margin-right: auto;
}

.footer-item.right {
    margin-left: auto;
}

/* Profile */

.profile-section {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.profile-img {
    width: var(--photo-size);
    height: var(--photo-size);
    object-fit: cover;
    border-radius: var(--rounding-radius);
    flex-shrink: 0;
}

.profile-info {
    flex: 1;
    min-width: var(--photo-size);
}

.profile-name {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.profile-titles {
    font-size: var(--font-size-small);
    margin-bottom: 0.5rem;
}

.profile-titles a {
    text-decoration: none;
    color: var(--colour-uoft);
}

.profile-titles.links a {
    color: var(--colour-link);
}

.blurb {
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.blurb a {
    text-decoration: none;
    color: var(--colour-link);
}

.two-column {
    display: flex;
    align-items: start;
    flex-wrap: wrap;
    gap: 1rem;
}

.teaser-img {
    height: var(--teaser-img-height);
    padding-top: 1rem;
}

.teaser-desc {
    flex-grow: 1;
    flex-shrink: 1;
    flex-basis: 200px;
}

/* Timeline */

.container.timeline {
    display: flex;
    flex-direction: column;
    position: relative;
    gap: 1rem;
    margin: 4rem auto;
}

.container.timeline::before {
    content: '';
    position: absolute;
    left: var(--timeline-left-padding);
    top: var(--timeline-stem-overrun);
    bottom: var(--timeline-stem-overrun);
    width: var(--timeline-width);
    background: linear-gradient(
        to bottom, 
        transparent 0%, 
        var(--colour-timeline) var(--timeline-grad-length),
        var(--colour-timeline) calc(100% - var(--timeline-grad-length)),
        transparent 100%
    );
    z-index: -1;
}

.container.timeline::after {
    content: '';
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--footer-grad-length);
    background: linear-gradient(
        to bottom,
        transparent 10%,
        var(--colour-bg) 100%
    );
    pointer-events: none;
    z-index: 10;
}

.timeline-era {
    position: relative;
    display: grid;
    grid-template-columns: var(--timeline-left-padding) auto;
}

.timeline-era-sticky-container {
    flex: 1;
    margin-bottom: auto;
}

.timeline-era-label {
    position: sticky;
    top: var(--top-buffer);
    font-size: var(--font-size-small);
}

.timeline-era-img {
    opacity: 0.5;
    max-height: 10rem;
    width: 85%;
    object-fit: contain;
    object-position: right;
    align-self: flex-end;
    margin-top: var(--timeline-content-padding);
    pointer-events: none;
}

.timeline-point {
    position: relative;
    top: calc(var(--timeline-content-padding) + var(--timeline-point-width));
    left: calc(-1 * var(--event-shift-left));
    margin-left: calc((var(--timeline-width) - var(--timeline-point-width)) / 2 - 0.5px);
    width: var(--timeline-point-width);
    height: var(--timeline-point-width);
    background: var(--colour-timeline);
    z-index: 1;
}

.timeline-point.line {
    left: calc(-0.962 * var(--event-shift-left));
    margin-left: 0;
    top: calc(var(--timeline-content-padding) + 2 * var(--timeline-point-width) / 3);
    height: calc(var(--timeline-point-width) / 3);
} 

.timeline-point.circle {
    margin-top: calc(-2 * var(--timeline-point-width) / 3);
    border-radius: 50%;
}

.timeline-event {
    display: flex;
    flex-direction: column;
    position: relative;
    width: min(auto, 60vw);
    left: calc(-1 * var(--timeline-stem-padding));
    margin-right: calc(var(--timeline-point-width) / 2);
    margin-bottom: 0.5rem;
    padding: 0 var(--timeline-content-padding) var(--timeline-content-padding);
    box-shadow: inset 0 5px 5px -5px var(--colour-shadow);
    border-radius: var(--rounding-radius);
    font-size: var(--font-size-small);
    text-decoration: none;
    color: inherit;
}

.timeline-event.uoft {
    box-shadow: inset 0 -5px 5px -5px var(--colour-shadow);
    background: linear-gradient(
        to top,
        var(--colour-academia) 30%,
        transparent 100%
    );
}

.timeline-event.industry {
    background: var(--colour-industry);
}

.timeline-event.academic {
    background: var(--colour-academia);
}

.timeline-event.grade-school {
    background: linear-gradient(
        to bottom,
        var(--colour-grade-school) 60%,
        transparent 100%
    );
}

.timeline-event-right-container {
    display: inline-flex;
    flex-direction: column;
    justify-content: flex-end;
    position: relative;
    padding-top: 0;
    padding-bottom: 0;
    left: var(--event-shift-left);
    transition: padding-top 0.3s ease, padding-bottom 0.3s ease;
}

.timeline-event.right {
    display: inline-block;
    margin-left: calc(var(--timeline-width) + var(--timeline-point-width) / 2);
    margin-right: 0;
    min-width: var(--event-min-width);
    left: calc(var(--timeline-content-padding) / 2);
    background: #ffffff;
    border-style: solid;
    border-color: #ffffff;
    border-width: 1px;
    opacity: 0.95;
    z-index: 10;
}

.timeline-event.right.small {
    font-size: var(--font-size-smaller);
}

.timeline-event.right.link, .timeline-event.right.small.link {
    box-shadow: 10px 10px 10px -5px var(--colour-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.timeline-event.right.link:hover, .timeline-event.right.small.link:hover {
    transform: translateY(-5px);
    box-shadow: 10px 10px 10px -2px var(--colour-shadow);
}

.timeline-event.right.small.academic, .timeline-event.right.small.link.academic {
    background: var(--colour-academia);
}

.timeline-event.right.small.industry, .timeline-event.right.small.link.industry {
    background: var(--colour-industry);
}

.timeline-event.right.small.grade-school, .timeline-event.right.small.link.grade-school {
    background: var(--colour-grade-school);
}

/* Dynamic elements */

.reveal {
    opacity: 0;
    transform: translateY(3rem);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
    will-change: opacity, transform;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* NOTE: can't use variables here, so need to update manually */
@media (max-width: 41rem) {
    .timeline-era-label {
        position: relative;
        top: 0;
    }
    .timeline-event-right-container {
        padding-top: var(--dynamic-padding-top, 13rem);
        padding-bottom: var(--dynamic-padding-bottom, 12rem);
    }
}