/* ==========================================================================
   site.css: shared by every page (tokens, base type, layout blocks, controls)
   Page-specific styles live in their own file, e.g. home.css.
   ========================================================================== */

:root {
    --paper: #F2F5F5;
    --ink: #15222C;
    --muted: #56646E;
    --rule: #CBD5D8;
    --link: #0B6B70;
    --serif: "Newsreader", Georgia, "Times New Roman", serif;
    --sans: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --wrap: 70rem;
    --gutter: clamp(1.25rem, 4vw, 2rem);
    --radius: 3px;
}

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

html {
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: 4.5rem;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--serif);
    font-optical-sizing: auto;
    font-size: 1.125rem;
    line-height: 1.6;
}

a {
    color: var(--link);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-decoration-color: color-mix(in srgb, var(--link) 45%, transparent);
    text-underline-offset: 0.2em;
    overflow-wrap: anywhere;
}
a:hover { text-decoration-thickness: 2px; text-decoration-color: currentColor; }

a:focus-visible, button:focus-visible {
    outline: 2px solid var(--link);
    outline-offset: 2px;
    border-radius: 2px;
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: -4rem;
    z-index: 200;
    padding: 0.6rem 1rem;
    background: var(--ink);
    color: var(--paper);
    font: 500 0.95rem var(--sans);
    text-decoration: none;
}
.skip-link:focus { top: 1rem; }

/* ---------- Navigation host (content comes from nav.html) ---------- */
#site-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    min-height: 3.5rem;
    background: var(--paper);
}

/* ---------- CV blocks ---------- */
.block {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: clamp(2rem, 4vw, 3rem) var(--gutter);
    display: grid;
    grid-template-columns: minmax(10rem, 14rem) minmax(0, 1fr);
    column-gap: clamp(2rem, 6vw, 6rem);
}
.block + .block { border-top: 1px solid var(--rule); }

.block__head {
    position: sticky;
    top: 4.75rem;
    align-self: start;
}
.block__head h2 {
    margin: 0;
    font-weight: 500;
    font-size: 1.6rem;
    line-height: 1.2;
    letter-spacing: -0.01em;
}
.block__head p {
    margin: 0.6rem 0 0;
    font-family: var(--sans);
    font-size: 0.9rem;
    line-height: 1.5;
}
.block__body { max-width: 44rem; }

.rows { margin: 0; padding: 0; display: grid; gap: 1.5rem; }
.row {
    display: grid;
    grid-template-columns: 9.5rem minmax(0, 1fr);
    gap: 0.25rem 1rem;
    align-items: baseline;
}
.row dt {
    font-family: var(--sans);
    font-size: 0.9rem;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}
.row dd { margin: 0; }
.row__what { font-weight: 500; }
.row__where { display: block; color: var(--muted); font-size: 1rem; }

.chip {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    font-family: var(--sans);
    font-size: 0.8rem;
    font-weight: 500;
    line-height: 1;
    text-decoration: none;
}
.chip:hover { border-color: var(--link); background: #fff; text-decoration: none; }

/* ---------- Footer ---------- */
.foot {
    max-width: var(--wrap);
    margin: clamp(1.5rem, 4vw, 3rem) auto 0;
    padding: 1.5rem var(--gutter) 2.5rem;
    border-top: 1px solid var(--rule);
    font-family: var(--sans);
    font-size: 0.85rem;
    color: var(--muted);
}
.foot p { margin: 0; }

/* ---------- Shared small controls ---------- */
[hidden] { display: none !important; }
.sr-only {
    position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
button.chip { cursor: pointer; background: transparent; color: var(--link); }
button.chip:hover { border-color: var(--link); background: #fff; }
button.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }

@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

/* ---------- Two-option view switch (e.g. Timeline / List) ---------- */
.viewtoggle {
    display: inline-flex;
    margin-top: 0.9rem;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    overflow: hidden;
}
.viewtoggle button {
    padding: 0.55rem 0.85rem;
    border: 0;
    background: transparent;
    color: var(--ink);
    font-family: var(--sans);
    font-size: 0.85rem;
    font-weight: 500;
    line-height: 1;
    cursor: pointer;
}
.viewtoggle button + button { border-left: 1px solid var(--rule); }
.viewtoggle button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

/* ---------- Topic sections ---------- */
.topic > :first-child { margin-top: 0; }
.topic > :last-child { margin-bottom: 0; }
.topic::after { content: ""; display: block; clear: both; }      /* contain floated images */
.topic > p { margin: 0 0 1rem; }
.topic h3 {
    clear: both;
    margin: 2rem 0 0.75rem;
    font-size: 1.2rem;
    font-weight: 500;
    line-height: 1.3;
}
.topic h3:first-child { margin-top: 0; }
.topic .pubs { margin-top: 1.25rem; }
.emph { font-weight: 600; }

/* ---------- Images and videos ---------- */
.media { margin: 1.5rem 0; }
.media img, .media video {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 2px;
}
.media video { max-width: 38rem; background: var(--ink); }
.media figcaption {
    margin-top: 0.5rem;
    font-family: var(--sans);
    font-size: 0.85rem;
    color: var(--muted);
}
.media-side {                                   /* image(s) beside the paragraph, as on the old page */
    float: left;
    width: min(13rem, 38%);
    margin: 0.3rem 1.5rem 1rem 0;
    display: grid;
    gap: 0.75rem;
}
.media-side .media { margin: 0; }

/* ---------- Key findings box ---------- */
.callout {
    margin: 1.75rem 0;
    padding: 1.1rem 1.4rem 1.25rem;
    background: #fff;
    border-left: 3px solid var(--link);
    border-radius: 0 var(--radius) var(--radius) 0;
}
.callout h3 { margin-top: 0; clear: none; }
.callout p { margin-bottom: 0.9rem; }
.callout ol { margin: 0 0 0.9rem; padding-left: 1.3rem; }
.callout li + li { margin-top: 0.5rem; }
.callout > :last-child { margin-bottom: 0; }


/* ---------- Responsive embedded video (YouTube etc.) ---------- */
.video-embed {
    position: relative;
    width: 100%;
    max-width: 38rem;
    padding-bottom: min(56.25%, 21.375rem);   /* 16:9, capped to match the max width */
    height: 0;
    background: var(--ink);
    border-radius: 2px;
    overflow: hidden;
}
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ---------- Mantle convection simulation ---------- */
.flow-stage {
    position: relative;
    height: clamp(19rem, 60vh, 38rem);          /* the home page hero uses this height directly */
    height: clamp(19rem, 60svh, 38rem);
    background: linear-gradient(#F2F5F5, #E5ECEC);
    border-block: 1px solid var(--rule);
}
.flow-stage canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    touch-action: pan-y;
}
.landing__title {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    pointer-events: none;                 /* the pointer always reaches the simulation */
    background: linear-gradient(90deg, rgba(242, 245, 245, 0.94) 0%, rgba(242, 245, 245, 0.88) 38%, rgba(242, 245, 245, 0) 78%);
}
.landing__inner { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.flow-legend {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0.5rem var(--gutter) 0;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
}
.flow-toggle {
    display: grid;
    place-items: center;
    width: 1.5rem;
    height: 1.5rem;
    padding: 0;
    border: 1px solid var(--rule);
    border-radius: 50%;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
}
.flow-toggle:hover { color: var(--ink); border-color: var(--muted); }
.flow-toggle .i-play { display: none; }
.flow-toggle[data-paused="true"] .i-play { display: block; }
.flow-toggle[data-paused="true"] .i-pause { display: none; }
.legend {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--sans);
    font-size: 0.75rem;
    color: var(--muted);
}
.legend i {
    width: 4rem;
    height: 0.4rem;
    border-radius: 2px;
    background: linear-gradient(90deg, #2A6A8F, #D9A441, #C0442A);
}

/* Shorter variant of the same banner, used at the top of inner pages (Research, Outreach, ...):
   <section class="page-banner"><div class="flow-stage">...<div class="landing__title">...<h1> */
.page-banner .flow-stage {
    height: clamp(12rem, 28vw, 20rem);
    height: clamp(12rem, 28svh, 20rem);
}
.page-banner .landing__inner h1 {
    margin: 0;
    font-weight: 500;
    font-size: clamp(2.4rem, 6vw, 3.75rem);
    line-height: 1.05;
    letter-spacing: -0.03em;
}
.page-banner + .page-subnav { margin-top: 0; }
.page-banner + .block { border-top: 1px solid var(--rule); }

@media (max-width: 820px) {
    .landing__title {
        align-items: flex-start;
        padding-top: 2rem;
        background: linear-gradient(180deg, rgba(242, 245, 245, 0.94) 0%, rgba(242, 245, 245, 0.8) 30%, rgba(242, 245, 245, 0) 62%);
    }
}



/* ---------- Search box with a live status line ---------- */
.pubtools { margin: 0 0 1.75rem; display: grid; gap: 0.85rem; }
.pubtools__row { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.pubtools input[type="search"], .pubtools select {
    min-height: 2.75rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    background: #fff;
    color: var(--ink);
    font-family: var(--sans);
    font-size: 0.95rem;
}
.pubtools input[type="search"] { flex: 1 1 15rem; min-width: 0; }
.pubtools__topics { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pubtools__status {
    margin: 0;
    font-family: var(--sans);
    font-size: 0.85rem;
    color: var(--muted);
}
.pubtools__status button {
    margin-left: 0.6rem;
    padding: 0;
    border: 0;
    background: none;
    color: var(--link);
    font: inherit;
    text-decoration: underline;
    cursor: pointer;
}

/* ---------- Page title (inner pages) ---------- */
.page-head {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: clamp(2.25rem, 5vw, 4rem) var(--gutter) clamp(1.5rem, 3vw, 2.25rem);
}
.page-head h1 {
    margin: 0;
    font-weight: 500;
    font-size: clamp(2.6rem, 6.5vw, 4.25rem);
    line-height: 1.05;
    letter-spacing: -0.03em;
}
/* A page with .page-subnav has two fixed bars stacked (the site nav and this one), so its section
   headings need a taller sticky offset than the default to clear both. */
.page-subnav ~ .block .block__head { top: 7.25rem; }

.page-subnav {
    position: sticky;
    top: 3.5rem;                    /* sits right below the site nav, which is the same height */
    z-index: 90;
    margin-top: 1.5rem;
    background: var(--paper);
    border-block: 1px solid var(--rule);
}
.page-head__links {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0.75rem var(--gutter);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* ---------- Publications ---------- */
.pubs {
    margin: 0;
    padding: 0 0 0 2.4rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}
.pubs li::marker {
    font-family: var(--sans);
    font-size: 0.9rem;
    color: var(--muted);
}
.pubs p { margin: 0; }
.pub__title { font-weight: 600; font-size: 1.175rem; line-height: 1.35; }
.pub__cite { margin-top: 0.3rem; }
.pub__cite .me { font-weight: 600; }
.pub__links { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.65rem; }


/* ---------- Small screens ---------- */
@media (max-width: 820px) {
    .block { grid-template-columns: minmax(0, 1fr); row-gap: 1.25rem; }
    .block__head { position: static; }
    .row { grid-template-columns: minmax(0, 1fr); gap: 0; }
    .pubs { padding-left: 1.9rem; }
    .media-side { float: none; width: 100%; max-width: 16rem; margin: 0 0 1.25rem; }
}