/* ------------------------------------------------------------------
   danielnguyen — portfolio
   Look: a light content card on a bold page colour, black sidebars,
   monospace type throughout, centered section headings.
   Tokens first. Change --frame to recolour the whole page.
   ------------------------------------------------------------------ */

:root {
  --frame: #0b5fb5;          /* the page colour behind the card (MacTrack cobalt) */
  --side: #0a0a0a;           /* sidebars + footer */
  --side-ink: #f2f2f2;
  --paper: #f4f5f7;          /* the card */
  --ink: #14181f;
  --muted: #5d6675;
  --rule: #d6dae1;
  --well: #e8ebf0;
  --link: #0b5fb5;
  --link-ink: #08488a;
  --ok: #1e9a5f;

  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --t-0: 0.95rem;            /* 15.2px body — mono reads best a touch smaller */
  --t-1: 1.15rem;
  --t-2: 1.5rem;
  --t-3: 1.95rem;
  --t-4: 2.5rem;
  --t-s: 0.82rem;

  --measure: 66ch;
  --side-w: 7.5rem;
  --card-w: 64rem;
}

:root[data-theme="dark"] {
  --paper: #13171e;
  --ink: #e7eaf0;
  --muted: #98a2b3;
  --rule: #2a313d;
  --well: #1b2029;
  --link: #7fb8f0;
  --link-ink: #a9d0f7;
  --frame: #083f78;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #13171e;
    --ink: #e7eaf0;
    --muted: #98a2b3;
    --rule: #2a313d;
    --well: #1b2029;
    --link: #7fb8f0;
    --link-ink: #a9d0f7;
    --frame: #083f78;
  }
}

/* ---- base ---------------------------------------------------------- */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--frame);
  color: var(--ink);
  font-family: var(--mono);
  font-size: var(--t-0);
  line-height: 1.65;
  font-feature-settings: "kern" 1, "liga" 0;
}

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

a { color: var(--link); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.16em; }
a:hover { color: var(--link-ink); }

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

h1, h2, h3 { font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; margin: 0; }
h1 { font-size: var(--t-4); }
h2 { font-size: var(--t-2); text-align: center; }
h3 { font-size: var(--t-1); }

p, ul, ol { margin: 0 0 1rem; }
ul, ol { padding-left: 1.3rem; }
li + li { margin-top: 0.35rem; }

code { background: var(--well); padding: 0.05em 0.3em; border-radius: 3px; font-size: 0.95em; }
strong { font-weight: 600; }
small { font-size: var(--t-s); }
.muted { color: var(--muted); }

/* ---- shell: sidebar | card | sidebar ------------------------------- */

.shell {
  display: grid;
  grid-template-columns: var(--side-w) minmax(0, 1fr) var(--side-w);
  min-height: 100vh;
}

.side {
  background: var(--side);
  color: var(--side-ink);
  min-width: 0;
}

.side-stick {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2.5rem 0.5rem;
  gap: 2.4rem;
}

.side-nav { display: flex; flex-direction: column; align-items: center; gap: 2.4rem; }

.side-nav a {
  color: var(--side-ink);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.side-nav a svg { width: 34px; height: 34px; stroke: currentColor; fill: none; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.side-nav a:hover, .side-nav a[aria-current="page"] { color: #fff; text-decoration: underline; text-underline-offset: 0.35em; }

.theme-toggle {
  font: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--side-ink);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
}
.theme-toggle svg { width: 30px; height: 30px; stroke: currentColor; fill: none; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle:hover { color: #fff; }
.theme-toggle .when-light { display: flex; flex-direction: column; align-items: center; gap: 0.45rem; }
.theme-toggle .when-dark { display: none; }
:root[data-theme="dark"] .theme-toggle .when-light { display: none; }
:root[data-theme="dark"] .theme-toggle .when-dark { display: flex; flex-direction: column; align-items: center; gap: 0.45rem; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .when-light { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .when-dark { display: flex; flex-direction: column; align-items: center; gap: 0.45rem; }
}

.card-col { padding: 3rem clamp(1rem, 4vw, 3.5rem) 3.5rem; }

.card {
  background: var(--paper);
  max-width: var(--card-w);
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4rem) clamp(1.25rem, 6vw, 5rem) 3.5rem;
}

.site-footer {
  grid-column: 1 / -1;
  background: var(--side);
  color: var(--side-ink);
  text-align: center;
  padding: 2.5rem 1rem 2.75rem;
  font-size: var(--t-s);
  line-height: 2;
}
.site-footer a { color: var(--side-ink); }
.site-footer .icons { display: flex; justify-content: center; gap: 1.6rem; margin-top: 0.75rem; }
.site-footer .icons svg { width: 26px; height: 26px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* ---- intro ---------------------------------------------------------- */

.intro { text-align: center; padding-bottom: 1rem; }
.intro h1 { margin-bottom: 0.6rem; }
.intro .icons { display: flex; justify-content: center; gap: 1.1rem; margin: 0 0 2.2rem; }
.intro .icons a { color: var(--ink); }
.intro .icons svg { width: 26px; height: 26px; stroke: currentColor; fill: none; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.intro .lede { text-align: left; max-width: var(--measure); margin: 0 auto 1rem; }
.intro .seeking { text-align: left; max-width: var(--measure); margin: 0 auto; color: var(--link); }

/* ---- sections ------------------------------------------------------- */

.section { padding-top: 3.5rem; }
.section > h2 { margin-bottom: 1.75rem; }
.section > p.center { text-align: center; color: var(--muted); font-size: var(--t-s); }

.entry { max-width: var(--measure); margin: 0 auto 2.25rem; }
.entry h3 { margin-bottom: 0.15rem; }
.entry .meta { color: var(--muted); font-size: var(--t-s); margin-bottom: 0.75rem; }
.entry .aside { color: var(--muted); font-size: var(--t-s); }
.entry p:last-child, .entry ul:last-child { margin-bottom: 0; }

/* the incident record — the one signature element, kept */
.record {
  background: var(--well);
  border-left: 3px solid var(--frame);
  padding: 1rem 1.25rem;
  margin: 1.25rem auto;
  max-width: var(--measure);
  font-size: var(--t-s);
  line-height: 1.55;
}
.record dl { margin: 0; display: grid; grid-template-columns: 5.5em 1fr; gap: 0.35rem 1rem; }
.record dt { color: var(--muted); }
.record dt::after { content: ":"; }
.record dd { margin: 0; white-space: pre-wrap; }
.record dd code { background: none; padding: 0; color: var(--link); }
.record-caption { color: var(--muted); font-size: var(--t-s); max-width: var(--measure); margin: 0.75rem auto 0; }
.how-i-work { padding-top: 2rem; }
.how-i-work .kicker { text-align: center; color: var(--muted); font-size: var(--t-s); margin-bottom: 0.75rem; }

/* resume embed */
.cv-embed { max-width: 52rem; margin: 0 auto 1rem; border: 1px solid var(--rule); background: #fff; }
.cv-embed object { display: block; width: 100%; height: 42rem; }
.cv-download { text-align: center; }

/* project showcase: image centered, caption above */
.showcase { text-align: center; max-width: 40rem; margin: 0 auto 2.75rem; }
.showcase .cap { margin-bottom: 0.6rem; }
.showcase .cap a { font-weight: 600; }
.showcase img { margin: 0 auto; border: 1px solid var(--rule); }
.showcase .blurb { text-align: left; margin: 1rem auto 0; color: var(--muted); font-size: var(--t-s); }
.showcase .blurb a { color: var(--link); }

/* tables */
table { border-collapse: collapse; width: 100%; font-size: var(--t-s); margin: 0 auto 1rem; }
th { background: var(--frame); color: #fff; text-align: left; padding: 0.55rem 0.7rem; font-weight: 700; }
td { padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
tbody tr:nth-child(odd) td { background: var(--well); }
.all-projects { max-width: 54rem; }
.all-projects td:first-child { white-space: nowrap; color: var(--muted); }
.all-projects td:nth-child(2) strong { display: block; font-weight: 600; color: var(--ink); }
.all-projects td:nth-child(2) { color: var(--muted); }
.all-projects td:last-child { white-space: nowrap; }

.list { list-style: none; padding: 0; margin: 0 auto; max-width: var(--measure); }
.list li { padding: 0.5rem 0; border-top: 1px solid var(--rule); margin: 0; }
.list li:first-child { border-top: 0; }
.list .when { display: inline-block; min-width: 7rem; color: var(--muted); font-size: var(--t-s); }

/* ---- article pages (case studies, notes) ---------------------------- */

.article-header { text-align: center; padding-bottom: 1rem; }
.article-header .when { color: var(--muted); font-size: var(--t-s); }
.article-header h1 { font-size: var(--t-3); margin: 0.25rem 0 0.75rem; }
.article-header .lede { text-align: left; max-width: var(--measure); margin: 0 auto 0.75rem; }
.article-header .facts { text-align: left; max-width: var(--measure); margin: 0 auto; color: var(--muted); font-size: var(--t-s); }

.article-body > h2 { margin: 2.75rem 0 1rem; }
.article-body > h2 > span:first-child { display: block; font-size: var(--t-s); font-weight: 500; color: var(--muted); letter-spacing: 0; }
.article-body > p, .article-body > ul, .article-body > ol, .article-body > h3 { max-width: var(--measure); margin-left: auto; margin-right: auto; }
.article-body > h3 { margin-top: 1.5rem; margin-bottom: 0.5rem; }
.article-body figure { margin: 1.5rem auto; max-width: 54rem; }
.article-body figcaption { color: var(--muted); font-size: var(--t-s); margin-top: 0.6rem; text-align: center; }
.article-body table { max-width: 54rem; }
.figure-frame { border: 1px solid var(--rule); background: #0b0e14; }

.screens { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; margin: 1.5rem auto 0.5rem; max-width: 54rem; }
.screens figure { margin: 0; }
.screens .span2 { grid-column: 1 / -1; }

.shots { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; margin: 1.5rem auto 0.5rem; max-width: 54rem; }
.shots figure { margin: 0; }
.shots img { border: 1px solid var(--rule); border-radius: 6px; }
.shots figcaption { margin-top: 0.4rem; }

.note { max-width: var(--measure); margin: 0 auto; padding: 2.5rem 0; border-top: 1px solid var(--rule); }
.note:first-of-type { border-top: 0; padding-top: 1rem; }
.note .when { color: var(--muted); font-size: var(--t-s); }
.note h2 { text-align: left; font-size: var(--t-2); margin: 0.2rem 0 1rem; }
.note .record { margin-left: 0; }

.status { display: inline-block; width: 0.55em; height: 0.55em; border-radius: 50%; background: var(--ok); margin-right: 0.5em; }

/* ---- responsive ----------------------------------------------------- */

@media (max-width: 900px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .side-stick {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0.8rem 0.6rem;
    gap: 0.8rem 1.1rem;
  }
  .side-nav { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 0.8rem 1.1rem; }
  .side-nav a { font-size: 0.65rem; gap: 0.3rem; }
  .side-nav a svg { width: 26px; height: 26px; }
  .side.right { display: none; }
  .side.left .theme-toggle { display: flex; }
  .card-col { padding: 1rem 0.75rem 1.5rem; min-width: 0; }
  .card { padding: 1.75rem 1rem 2.25rem; min-width: 0; overflow-wrap: anywhere; }
  .cv-embed, .all-projects { overflow-x: auto; }
  .screens { grid-template-columns: 1fr; }
  .all-projects td:last-child { white-space: normal; }
  .cv-embed object { height: 28rem; }
  .record dl { grid-template-columns: 1fr; gap: 0.1rem; }
  .record dt { margin-top: 0.5rem; }
  .record dt:first-child { margin-top: 0; }
  .list .when { display: block; min-width: 0; }
}

@media (min-width: 901px) {
  .side.left .theme-toggle { display: none; }
}

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }

@media print {
  body { background: #fff; }
  .side, .site-footer, .cv-embed { display: none; }
  .card { max-width: none; padding: 0; }
  a { color: inherit; text-decoration: none; }
}