/* Shared theme for samwitte.com. Tokens match the PCB page (samwitte.com/pcb). */

:root {
    --bg: #f5f4ef;
    --ink: #1b1e1b;
    --muted: #6b706a;
    --line: #dddcd3;
    --grid: rgba(27, 30, 27, 0.07);
    --accent: #1f6b47;      /* soldermask green */
    --accent-ink: #ffffff;
    --copper: #b8733a;
    --shadow: rgba(27, 30, 27, 0.28);
    --sheet: #fdfcf8;
    --t-job: #1f6b47;
    --t-freelance: #5f6f12;
    --t-internship: #2563a8;
    --t-research: #7a4fb5;
    --t-teaching: #0e7a77;
    --t-project: #b0672c;
    --t-hackathon: #c0396a;
    --t-coursework: #8f6d07;
    --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #121513;
        --ink: #e9ebe6;
        --muted: #8f968e;
        --line: #2a2f2b;
        --grid: rgba(233, 235, 230, 0.05);
        --accent: #4cb582;
        --accent-ink: #0d120f;
        --copper: #d6925a;
        --shadow: rgba(0, 0, 0, 0.6);
        --sheet: #1b1f1c;
        --t-job: #4cb582;
        --t-freelance: #b9cc55;
        --t-internship: #6ea8ef;
        --t-research: #b28ce8;
        --t-teaching: #4cc3bf;
        --t-project: #d6925a;
        --t-hackathon: #ee7aa2;
        --t-coursework: #d8b443;
    }
}

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

html, body { margin: 0; }

body {
    min-height: 100dvh;
    font-family: "Huninn", system-ui, sans-serif;
    color: var(--ink);
    background-color: var(--bg);
    /* faint grid, like an empty layout canvas */
    background-image: radial-gradient(var(--grid) 1px, transparent 1.2px);
    background-size: 24px 24px;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

a:focus-visible {
    outline: 2px solid var(--copper);
    outline-offset: 3px;
}

.page {
    min-height: 100dvh;
    max-width: 1240px;
    margin: 0 auto;
    padding: clamp(20px, 4vh, 40px) clamp(20px, 5vw, 56px);
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: clamp(32px, 6vh, 64px);
}

/* header */

.top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 8px 24px;
    font-size: 15px;
}

.wordmark {
    font-size: 18px;
    text-decoration: none;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 22px;
}

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

.nav a:hover,
.nav a[aria-current="page"] { color: var(--ink); }

/* type shared by every page */

.eyebrow {
    margin: 0 0 14px;
    color: var(--copper);
    font-size: 15px;
    letter-spacing: 0.04em;
}

.eyebrow a { text-decoration: none; }
.eyebrow a:hover { text-decoration: underline; }

h1 {
    margin: 0;
    font-weight: 400;
    font-size: clamp(34px, 4.6vw, 56px);
    line-height: 1.08;
    letter-spacing: -0.02em;
    text-wrap: balance;
}

.lede {
    margin: 18px 0 0;
    max-width: 36em;
    color: var(--muted);
    font-size: clamp(16px, 1.3vw, 18px);
    line-height: 1.6;
}

.lede a { color: var(--ink); }

/* footer */

.bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px 24px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 14px;
}

.bottom nav { display: flex; flex-wrap: wrap; gap: 6px 20px; }
.bottom a { text-decoration: none; }
.bottom a:hover { color: var(--ink); }

/* landing: two doors */

.hub {
    align-self: center;
    display: grid;
    justify-items: center;
    gap: clamp(28px, 5vh, 48px);
    text-align: center;
}

.hub .lede { margin-inline: auto; }

.doors {
    width: 100%;
    max-width: 920px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(16px, 2.5vw, 28px);
}

.door {
    position: relative;
    display: grid;
    grid-template-rows: auto 1fr;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--sheet);
    text-align: left;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.door:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
    box-shadow: 0 24px 50px -24px var(--shadow);
}

.door-art {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
}

.door-art img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.door:hover .door-art img { transform: scale(1.04); }

/* PCB door: schematic and layout split by a slash 30 degrees off vertical.
   In a 16:9 box that slant spans 32.5% of the width (tan 30 x 9/16), centred on 50%. */
.door-art.split { position: relative; }

.door-art.split img { position: absolute; inset: 0; }

.door-art.split .split-b {
    clip-path: polygon(66.25% 0, 100% 0, 100% 100%, 33.75% 100%);
    transition: clip-path 0.6s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.door-art.split::after {
    content: "";
    position: absolute;
    left: 50%;
    top: -10%;
    width: 4px;
    height: 120%;
    background: #f5f4ef;
    box-shadow: 0 0 6px rgba(0, 0, 0, 0.35);
    transform: translateX(-50%) rotate(30deg);
    transition: left 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.door:hover .door-art.split .split-b { clip-path: polygon(62.25% 0, 100% 0, 100% 100%, 29.75% 100%); }
.door:hover .door-art.split::after { left: 46%; }

.split-tag {
    position: absolute;
    bottom: 10px;
    z-index: 1;
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(15, 18, 16, 0.72);
    color: #e9ebe6;
    font-size: 12px;
    letter-spacing: 0.02em;
}

.split-tag-a { left: 10px; }
.split-tag-b { right: 10px; }

/* the 3D render is transparent, so it sits on the card's own background */
.door-art.contain img { object-fit: contain; padding: 2% 0; }

.door-body {
    display: grid;
    align-content: start;
    gap: 8px;
    padding: 22px 24px 24px;
}

.door-kicker {
    color: var(--copper);
    font-size: 13px;
    letter-spacing: 0.04em;
}

.door h2 {
    margin: 0;
    font-weight: 400;
    font-size: clamp(22px, 2.2vw, 28px);
    line-height: 1.2;
}

.door p {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.55;
}

.door-go {
    margin-top: 10px;
    color: var(--accent);
    font-size: 15px;
}

.door-go::after {
    content: "\2192";
    display: inline-block;
    margin-left: 6px;
    transition: transform 0.2s ease;
}

.door:hover .door-go::after { transform: translateX(4px); }

/* portfolio index */

.intro { max-width: 760px; }

.links {
    margin-top: 24px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 24px;
}

.button {
    display: inline-block;
    padding: 12px 22px;
    border-radius: 999px;
    background: var(--accent);
    color: var(--accent-ink);
    text-decoration: none;
    font-size: 16px;
    transition: transform 0.15s ease, filter 0.15s ease;
}

.button:hover { filter: brightness(1.08); transform: translateY(-1px); }

.underline {
    text-decoration: none;
    border-bottom: 1px solid var(--line);
    padding-bottom: 2px;
}

.underline:hover { border-color: var(--ink); }

.portfolio {
    display: grid;
    align-content: start;
    gap: clamp(40px, 7vh, 64px);
}

/* timeline: each event sets data-type, which picks its colour */

.event[data-type="job"]        { --type: var(--t-job); }
.event[data-type="freelance"]  { --type: var(--t-freelance); }
.event[data-type="internship"] { --type: var(--t-internship); }
.event[data-type="research"]   { --type: var(--t-research); }
.event[data-type="teaching"]   { --type: var(--t-teaching); }
.event[data-type="project"]    { --type: var(--t-project); }
.event[data-type="hackathon"]  { --type: var(--t-hackathon); }
.event[data-type="coursework"] { --type: var(--t-coursework); }

.timeline {
    position: relative;
    max-width: 880px;
    margin: 0;
    padding: 0 0 0 36px;
    list-style: none;
    display: grid;
    gap: 18px;
}

/* the rail */
.timeline::before {
    content: "";
    position: absolute;
    left: 9px;
    top: 10px;
    bottom: 10px;
    width: 2px;
    border-radius: 2px;
    background: var(--line);
}

.event {
    --type: var(--muted);
    position: relative;
    scroll-margin-top: 24px;
}

/* the dot, in the event's colour */
.event::before {
    content: "";
    position: absolute;
    left: -36px;
    top: 24px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--type);
    box-shadow: 0 0 0 5px var(--bg);
}

.event-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 20px;
    padding: 20px 22px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--sheet);
}

.event:target .event-card { border-color: var(--type); }

.event-title {
    margin: 0;
    font-weight: 700;
    font-size: 19px;
    line-height: 1.3;
}

.event-meta {
    margin: 8px 0 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 12px;
    font-size: 14px;
    color: var(--muted);
}

.event-type {
    padding: 2px 10px;
    border-radius: 999px;
    color: var(--type);
    background: color-mix(in srgb, var(--type) 13%, transparent);
    font-size: 13px;
}

.event-meta time { font-style: italic; }

.event-desc {
    margin: 10px 0 0;
    max-width: 38em;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.6;
}

.event-link {
    display: inline-block;
    margin-top: 12px;
    color: var(--accent);
    font-size: 15px;
    text-decoration: none;
}

.event-link::after {
    content: "\2192";
    display: inline-block;
    margin-left: 6px;
    transition: transform 0.2s ease;
}

.event-link:hover::after { transform: translateX(4px); }

.event-figure { margin: 0; }

.event-figure figcaption {
    margin-top: 6px;
    color: var(--muted);
    font-size: 12px;
    text-align: right;
}

.event-figure figcaption a { color: inherit; }

.event-photo {
    width: 176px;
    aspect-ratio: 4 / 3;
    height: auto;
    object-fit: cover;
    border: 1px solid var(--line);
    border-radius: 10px;
}

/* write-ups */

.article {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
}

.article > header { margin-bottom: clamp(28px, 5vh, 44px); }

.prose {
    font-size: 17px;
    line-height: 1.7;
}

.prose > * { margin: 0 0 1.1em; }

.prose h2 {
    margin: 2.2em 0 0.6em;
    font-weight: 400;
    font-size: 26px;
    line-height: 1.25;
}

.prose h3 {
    margin: 1.8em 0 0.5em;
    font-weight: 400;
    font-size: 20px;
}

.prose h2::before {
    content: "";
    display: block;
    width: 28px;
    height: 2px;
    margin-bottom: 14px;
    background: var(--copper);
}

.prose a {
    color: var(--accent);
    text-underline-offset: 3px;
}

.prose ul,
.prose ol { padding-left: 1.3em; }

.prose li { margin: 0.3em 0; }

.prose figure { margin: 2em 0; }

.prose img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
    border: 1px solid var(--line);
    border-radius: 12px;
}

.prose figcaption {
    margin-top: 10px;
    color: var(--muted);
    font-size: 14px;
    text-align: center;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.gallery img { aspect-ratio: 4 / 3; width: 100%; object-fit: cover; }

.prose code {
    font-family: var(--mono);
    font-size: 0.88em;
    padding: 1px 5px;
    border-radius: 5px;
    background: var(--sheet);
    border: 1px solid var(--line);
}

.prose pre {
    overflow-x: auto;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--sheet);
    font-size: 14px;
    line-height: 1.55;
}

.prose pre code { padding: 0; border: 0; background: none; font-size: inherit; }

.toc {
    padding: 16px 20px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--sheet);
    font-size: 15px;
}

.toc strong { font-weight: 400; color: var(--muted); }

.prose .dates {
    margin-top: -0.4em;
    color: var(--muted);
    font-size: 15px;
    font-style: italic;
}

.notice {
    padding: 16px 20px;
    border: 1px dashed var(--line);
    border-radius: 12px;
    color: var(--muted);
}

.pager {
    margin-top: clamp(40px, 8vh, 72px);
    padding-top: 18px;
    border-top: 1px solid var(--line);
    font-size: 15px;
}

.pager a { color: var(--muted); text-decoration: none; }
.pager a:hover { color: var(--ink); }

/* small screens */

@media (max-width: 720px) {
    .doors { grid-template-columns: minmax(0, 1fr); }
    .timeline { padding-left: 28px; }
    .timeline::before { left: 6px; }
    .event::before { left: -28px; width: 14px; height: 14px; top: 26px; }
    .event-card { grid-template-columns: minmax(0, 1fr); padding: 18px; }
    .event-photo { grid-row: 1; width: 100%; }
    .event-figure { grid-row: 1; }
    .gallery { grid-template-columns: minmax(0, 1fr); }
}