:root {
    --background: #17243a;
    --surface: #243653;
    --surface-light: #30496b;

    --text: #f5f8fc;
    --muted: #c4d0df;

    --accent: #70b7ff;
    --accent-hover: #9bcfff;

    --border: #3b5578;
}


/*
   Base
*/

body {
    font-family:
        Inter,
        "Segoe UI",
        system-ui,
        sans-serif;

    line-height: 1.7;

    color: var(--text);
    background: var(--background);

    margin: 0;
}

p {
    margin-bottom: 1.3rem;
}

.container {
    max-width: 900px;

    margin-left: auto;
    margin-right: auto;

    padding: 1.5rem;
}

main {
    background: rgba(255, 255, 255, 0.02);

    border-radius: 24px;

    margin-top: 0rem;
}

:not(pre) > code {
    font-size: 1em !important;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

/*
   Navigation
*/

header {
    border-bottom: 1px solid var(--border);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.logo img {
    height: 32px;
    width: auto;
    display: block;
}

nav a {
    margin-left: 2rem;

    text-decoration: none;
    color: var(--muted);
}

nav a:first-child {
    margin-left: 0;
}

nav a:hover {
    color: var(--accent);
}

nav .external-link {
    margin-left: 2rem;
}

nav .external-link::after {
    content: "↗";

    font-size: 0.65em;
    vertical-align: super;

    margin-left: 0.1rem;

    color: var(--muted);
}


/*
   Hero
*/

.hero {
    padding-top: 0rem;
    padding-bottom: 4rem;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);

    line-height: 1.15;
    letter-spacing: -0.035em;
}

h2 {
    margin-top: 0.5rem;
    color: white;
}

.hero h1 {
    width: fit-content;

    font-size: clamp(2.2rem, 5vw, 3.5rem);

    line-height: 1.15;
    letter-spacing: -0.035em;
}

.hero h1::after {
    content: "";

    display: block;

    height: 4px;
    width: 75%;

    background: var(--accent);

    margin-top: 1.5rem;

    border-radius: 2px;
}

.lead {
    font-size: 1.4rem;

    color: var(--muted);

    max-width: 700px;
}


/*
   General links
*/

a {
    color: var(--text);
    text-decoration: none;
}

a:hover {
    color: var(--accent);
}


/*
   Articles
*/

article {
    margin-bottom: 3rem;
}

article h2 a {
    color: white;
    text-decoration: none;
}

article h2 a:hover {
    color: var(--accent);
}

.date {
    color: var(--muted);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.tag {
    display: inline-block;
    padding: 0.2rem 0.65rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--accent);
    font-size: 0.85rem;
}

.article-summary {
    color: var(--muted);
    margin-top: 0.75rem;
}

.read-more {
    display: inline-block;
    margin-top: 0.5rem;
    font-weight: 600;
}

figure {
    margin: 2rem 0;
}

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

figcaption {
    margin-top: 0.5rem;
    color: var(--muted);
    font-size: 0.9rem;
}

/*
   Presentations
*/

.presentations {
    display: grid;

    grid-template-columns: 1fr;

    gap: 2rem;
}

.presentation-card {
    background: var(--surface);

    border-radius: 20px;

    border: 1px solid var(--border);

    overflow: hidden;

    padding: 1.5rem;
}

.presentation-card img {
    width: 40%;

    max-height: 350px;

    object-fit: contain;

    display: block;

    margin-left: 0;
    margin-right: 0;

    margin-top: 0.5rem;
    margin-bottom: 1.5rem;

    border-radius: 12px;
}

.presentation-card h2 {
    margin-left: 0;
    margin-right: 0;
    margin-top: 1rem;
}

.presentation-card p {
    margin-left: 0;
    margin-right: 0;
}

.presentation-meta {
    color: var(--muted);
}

.pdf-link {
    display: inline-block;

    margin-top: 1.5rem;
    margin-left: 0;

    padding: 0.6rem 1.2rem;

    background: var(--accent);
    color: #0f172a;

    border-radius: 8px;

    text-decoration: none;
    font-weight: 600;
}

/*
  About
*/
.about-badges {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
    margin: 2rem 0;
}

.about-badges td {
    width: 25%;
    padding: 0.25rem;
    text-align: center;
}

.about-badges img {
    display: block;
    width: 90%;
    height: auto;
    transition: transform 0.2s ease;
}

.about-badges a:hover img {
    transform: scale(1.08);
}

/*
   Expertise cards
*/

.cards {
    display: flex;

    gap: 2rem;

    margin-top: 2rem;
}

.cards > div {
    flex: 1;

    background: var(--surface);

    border-radius: 16px;

    border: 1px solid var(--border);

    padding: 2rem;

    transition:
        transform .15s ease,
        background .15s ease;
}

.cards > div:hover {
    transform: translateY(-3px);

    background: var(--surface-light);
}

.cards h3 {
    color: white;
}

.cards p {
    color: var(--muted);
}


/*
   Footer
*/

footer {
    margin-top: 5rem;

    border-top: 1px solid var(--border);

    color: var(--muted);
}

footer a {
    color: inherit;
}


/*
   Mobile
*/

@media (max-width: 700px) {

    .container {
        padding: 1.25rem;
    }


    /*
       Navigation
    */

    header .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .logo {
        display: block;

        width: 100%;

        font-size: 1.5rem;
        line-height: 1.1;

        white-space: nowrap;

        margin: 0 0 1.5rem 0;
    }

    nav {
        width: 100%;

        display: grid;

        grid-template-columns:
            max-content max-content;

        column-gap: 2.5rem;
        row-gap: 0.75rem;

        margin: 0;
        padding: 0;
    }

    nav a,
    nav .external-link {
        display: block;

        margin: 0;
        padding: 0;
    }

    nav .external-link {
        grid-column: 1;
    }


    /*
       Expertise cards
    */

    .cards {
        flex-direction: column;

        gap: 1.25rem;
    }
}