/* =========================================================
   Stuart Hofmeyr — personal site
   Style: Clean & minimal
   One stylesheet for the whole site.
   Colours, fonts and spacing are set with CSS variables below,
   so you can re-skin the site by editing just this :root block.
   ========================================================= */

:root {
  /* Brand colours */
  --ink:        #1a1a1a;   /* main text */
  --ink-soft:   #555;      /* secondary text */
  --ink-faint:  #8a8a8a;   /* hints, captions */
  --line:       #e7e6e2;   /* hairline borders */
  --paper:      #fcfcfb;   /* page background */
  --paper-2:    #f5f4f0;   /* alternate panels */
  --accent:     #1a1a1a;   /* buttons / links accent (kept monochrome for minimal look) */
  --accent-ink: #ffffff;   /* text on accent */

  /* Type */
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Layout */
  --maxw: 980px;
  --gutter: clamp(20px, 5vw, 48px);
  --radius: 4px;
}

/* ---------- Reset-ish ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

/* ---------- Layout helpers ---------- */
.container { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(48px, 8vw, 96px); }
.section--alt { background: var(--paper-2); }
.center { text-align: center; }
.muted { color: var(--ink-soft); }
.eyebrow {
  font-size: 13px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 14px;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; color: var(--ink); line-height: 1.15; margin: 0 0 .5em; }
h1 { font-size: clamp(2.1rem, 5.5vw, 3.4rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.1rem); }
h3 { font-size: 1.2rem; }
p  { margin: 0 0 1.1em; max-width: 68ch; }
.lead { font-size: clamp(1.1rem, 2.2vw, 1.35rem); color: var(--ink-soft); line-height: 1.55; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; font-family: var(--sans); font-size: 15px; font-weight: 500;
  padding: 12px 22px; border-radius: var(--radius); border: 1px solid var(--ink);
  transition: background .18s ease, color .18s ease, transform .05s ease;
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn--solid { background: var(--accent); color: var(--accent-ink); }
.btn--solid:hover { background: #000; }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--accent-ink); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-family: var(--serif); font-size: 1.15rem; font-weight: 500; letter-spacing: -.01em; }
.nav-links { display: flex; gap: 28px; align-items: center; list-style: none; margin: 0; padding: 0; }
.nav-links a { font-size: 15px; color: var(--ink-soft); position: relative; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links a[aria-current="page"]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; background: var(--ink);
}
.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer; padding: 8px;
  font-size: 22px; line-height: 1; color: var(--ink);
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: var(--paper);
    border-bottom: 1px solid var(--line);
    max-height: 0; overflow: hidden; transition: max-height .25s ease;
  }
  .nav-links.open { max-height: 320px; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 16px var(--gutter); border-top: 1px solid var(--line); }
  .nav-links a[aria-current="page"]::after { display: none; }
}

/* ---------- Hero ---------- */
.hero { padding-block: clamp(56px, 11vw, 130px); }
.hero .lead { margin-top: 6px; }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: border-color .18s ease, transform .18s ease;
}
.card:hover { border-color: #cfcdc7; }
.card h3 { margin-bottom: .35em; }
.card .arrow { margin-top: 16px; font-size: 14px; color: var(--ink-faint); }
.card a.stretched::after { content: ""; position: absolute; inset: 0; }
.card.has-link { position: relative; }

/* ---------- Pricing ---------- */
.price-grid { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.price {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; background: var(--paper);
  display: flex; flex-direction: column;
}
.price--featured { border-color: var(--ink); }
.price .tag { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
.price .amount { font-family: var(--serif); font-size: 2.2rem; margin: 8px 0 4px; }
.price .amount small { font-size: .9rem; color: var(--ink-soft); font-family: var(--sans); }
.price ul { list-style: none; padding: 0; margin: 18px 0 24px; }
.price li { padding: 8px 0; border-top: 1px solid var(--line); font-size: 15px; color: var(--ink-soft); }
.price .btn { margin-top: auto; text-align: center; }

/* ---------- CV ---------- */
.cv-head { display: grid; grid-template-columns: 1fr; gap: 32px; align-items: center; }
@media (min-width: 720px) { .cv-head { grid-template-columns: 1fr 200px; } }
.cv-photo {
  width: 180px; height: 180px; border-radius: 50%; background: var(--paper-2);
  border: 1px solid var(--line); object-fit: cover; object-position: center 30%;
  justify-self: center;
}
@media (min-width: 720px) { .cv-photo { justify-self: end; } }
.cv-section { border-top: 1px solid var(--line); padding-top: 28px; margin-top: 40px; }
.cv-item { display: grid; grid-template-columns: 1fr; gap: 4px; margin-bottom: 26px; }
@media (min-width: 720px) { .cv-item { grid-template-columns: 170px 1fr; gap: 24px; } }
.cv-item .when { color: var(--ink-faint); font-size: 14px; padding-top: 3px; }
.cv-item h3 { margin: 0 0 2px; font-size: 1.05rem; }
.cv-item .org { color: var(--ink-soft); font-size: 15px; margin: 0 0 8px; }
.cv-item ul { margin: 6px 0 0; padding-left: 18px; color: var(--ink-soft); font-size: 15px; }
.cv-item ul li { margin-bottom: 4px; }
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-chip { font-size: 14px; padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft); transition: border-color .15s ease, color .15s ease; }
a.tag-chip:hover { border-color: #cfcdc7; color: var(--ink); }

/* ---------- Experience list (minimal) ---------- */
.exp-item { padding: 22px 0; border-top: 1px solid var(--line); }
#exp-list .exp-item:first-child { border-top: 0; padding-top: 6px; }
.exp-item h3 { margin: 0 0 3px; font-size: 1.14rem; }
.exp-item .org { color: var(--ink-soft); font-size: 15px; margin: 0 0 8px; }
.exp-item p { margin: 0; color: var(--ink-soft); font-size: 15px; max-width: 66ch; }

/* ---------- Sort control ---------- */
.sort-bar { display: flex; align-items: center; gap: 8px; margin: 2px 0 18px; font-size: 13px; color: var(--ink-faint); }
.sort-bar .label { letter-spacing: .06em; text-transform: uppercase; }
.sort-btn {
  font: inherit; font-size: 14px; cursor: pointer; color: var(--ink-soft);
  background: transparent; border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.sort-btn:hover { border-color: #cfcdc7; color: var(--ink); }
.sort-btn[aria-pressed="true"] { background: var(--ink); color: var(--accent-ink); border-color: var(--ink); }

/* ---------- Bibliography ---------- */
.bib { list-style: none; margin: 0; padding: 0; }
.bib li { padding: 16px 0; border-top: 1px solid var(--line); font-size: 15px; color: var(--ink-soft); line-height: 1.6; }
.bib li:first-child { border-top: 0; padding-top: 4px; }
.bib li a { color: var(--ink); text-decoration: underline; white-space: nowrap; }

/* ---------- Blog ---------- */
.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li { border-top: 1px solid var(--line); }
.post-list li:last-child { border-bottom: 1px solid var(--line); }
.post-link { display: block; padding: 26px 0; transition: padding-left .18s ease; }
.post-link:hover { padding-left: 8px; }
.post-link .date { font-size: 13px; color: var(--ink-faint); letter-spacing: .04em; }
.post-link h3 { margin: 6px 0 6px; }
.post-link p { color: var(--ink-soft); margin: 0; font-size: 15px; }

.article { max-width: 720px; margin-inline: auto; }
.article .date { color: var(--ink-faint); font-size: 14px; }
.article h1 { margin-top: 8px; }
.article p { font-size: 1.08rem; line-height: 1.75; }
.article h2 { margin-top: 1.6em; }
.article blockquote {
  margin: 1.6em 0; padding: 4px 0 4px 22px; border-left: 3px solid var(--ink);
  font-family: var(--serif); font-size: 1.25rem; color: var(--ink); font-style: italic;
}
.article img { border-radius: var(--radius); margin: 1.6em 0; }

/* ---------- Contact ---------- */
.form { display: grid; gap: 16px; max-width: 520px; }
.form label { font-size: 14px; color: var(--ink-soft); display: grid; gap: 6px; }
.form input, .form textarea {
  font: inherit; font-size: 16px; padding: 12px 14px; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--paper); color: var(--ink);
}
.form input:focus, .form textarea:focus { outline: 2px solid var(--ink); outline-offset: 0; border-color: var(--ink); }
.form textarea { min-height: 130px; resize: vertical; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding-block: 48px; margin-top: 24px; }
.foot-grid { display: flex; flex-wrap: wrap; gap: 18px; justify-content: space-between; align-items: center; }
.foot-grid .links { display: flex; gap: 22px; flex-wrap: wrap; }
.foot-grid a { color: var(--ink-soft); font-size: 15px; }
.foot-grid a:hover { color: var(--ink); }
.site-footer small { color: var(--ink-faint); font-size: 13px; }

/* ---------- Utility ---------- */
.stack-sm > * + * { margin-top: 10px; }
.mt-0 { margin-top: 0; }
.hidden { display: none; }
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff;
  padding: 10px 16px; z-index: 100; border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }