/* ============================================================
   Jake Gerlofs — Portfolio
   Design system per Web Portfolio Spec, Section 5
   Palette: slate #1C3557 / amber #E8883A / green #2D6A4F
   Type: Lora (display) + Inter (body) + JetBrains Mono (labels)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400..700;1,400..600&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --slate: #1C3557;
  --slate-90: #24406a;
  --amber: #E8883A;
  --amber-dark: #cf6f24;
  --ink: #1A1A1A;
  --ink-soft: #45474a;
  --bg: #F7F6F3;
  --surface: #ECEAE6;
  --surface-2: #ffffff;
  --line: #dedbd4;
  --green: #2D6A4F;
  --green-soft: #e4efe9;

  --serif: 'Lora', Georgia, 'Times New Roman', serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --wrap: 1080px;
  --read: 680px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(28,53,87,.06), 0 12px 32px -12px rgba(28,53,87,.18);
  --shadow-hover: 0 2px 4px rgba(28,53,87,.08), 0 22px 48px -16px rgba(28,53,87,.28);
}

/* ---------- Reset / base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--slate); text-decoration: none; }
a:hover { color: var(--amber-dark); }
h1, h2, h3, h4 { font-family: var(--serif); color: var(--slate); line-height: 1.18; margin: 0 0 .5em; font-weight: 600; }
h1 { font-size: clamp(2.1rem, 5vw, 3rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 3vw, 1.9rem); }
h3 { font-size: 1.22rem; }
p { margin: 0 0 1.1em; }
strong { font-weight: 600; }

/* ---------- Layout ---------- */
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.read { max-width: var(--read); }
.section { padding: 72px 0; }
.section--tight { padding: 48px 0; }
.bg-surface { background: var(--surface); }
.bg-slate { background: var(--slate); color: #eef1f6; }
.bg-slate h1, .bg-slate h2, .bg-slate h3 { color: #fff; }
.center { text-align: center; }
.eyebrow {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--amber-dark); margin: 0 0 14px; font-weight: 500;
}
.lead { font-size: 1.18rem; color: var(--ink-soft); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247,246,243,.86);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-family: var(--serif); font-weight: 600; font-size: 1.12rem; color: var(--slate); letter-spacing: -.01em; }
.brand span { color: var(--amber); }
.nav__links { display: flex; gap: 26px; align-items: center; }
.nav__links a { font-size: .93rem; font-weight: 500; color: var(--ink-soft); }
.nav__links a:hover, .nav__links a.active { color: var(--slate); }
.nav__links a.active { border-bottom: 2px solid var(--amber); padding-bottom: 2px; }
.nav__toggle { display: none; background: none; border: 0; cursor: pointer; font-size: 1.5rem; color: var(--slate); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-weight: 600; font-size: .95rem;
  padding: 12px 22px; border-radius: 999px; border: 1.5px solid transparent;
  cursor: pointer; transition: transform .12s ease, box-shadow .15s ease, background .15s ease;
}
.btn--primary { background: var(--amber); color: #fff; }
.btn--primary:hover { background: var(--amber-dark); color: #fff; transform: translateY(-1px); }
.btn--slate { background: var(--slate); color: #fff; }
.btn--slate:hover { background: var(--slate-90); color: #fff; transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--slate); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--slate); color: var(--slate); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Hero ---------- */
.hero { padding: 96px 0 84px; }
.hero h1 { max-width: 16ch; }
.hero .lead { max-width: 54ch; margin-bottom: 28px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }

/* ---------- Stats bar ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; padding: 8px; }
.stat__num { font-family: var(--serif); font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 700; color: var(--slate); line-height: 1; }
.stat__num em { font-style: normal; color: var(--amber); }
.stat__label { font-size: .82rem; color: var(--ink-soft); margin-top: 8px; letter-spacing: .01em; }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); transition: transform .14s ease, box-shadow .18s ease;
  display: flex; flex-direction: column;
}
a.card { color: inherit; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.card__kicker { font-family: var(--mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-soft); margin-bottom: 10px; }
.card h3 { font-size: 1.16rem; margin-bottom: 8px; }
.card__hook { color: var(--ink-soft); font-size: .98rem; margin-bottom: 16px; flex: 1; }
.card__more { font-weight: 600; color: var(--amber-dark); font-size: .92rem; margin-top: auto; }
.card:hover .card__more { color: var(--amber-dark); }

/* ---------- Badges ---------- */
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.badge {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .02em;
  padding: 4px 10px; border-radius: 999px; background: var(--surface); color: var(--ink-soft); border: 1px solid var(--line);
}
.badge--pub { background: var(--green-soft); color: var(--green); border-color: #cfe3d8; font-weight: 500; }
.badge--applied { background: #fbeede; color: var(--amber-dark); border-color: #f2d6b3; }
.badge--slate { background: #e7ecf4; color: var(--slate); border-color: #d4ddec; }

/* ---------- Lead stat / pull ---------- */
.leadstat {
  border-left: 4px solid var(--amber); padding: 6px 0 6px 22px; margin: 30px 0;
}
.leadstat__big { font-family: var(--serif); font-size: clamp(1.6rem, 3.6vw, 2.3rem); font-weight: 700; color: var(--slate); line-height: 1.15; }
.leadstat__big em { font-style: normal; color: var(--amber); }
.leadstat__cap { color: var(--ink-soft); font-size: .95rem; margin-top: 6px; }

.pullquote {
  font-family: var(--serif); font-size: 1.35rem; font-style: italic; color: var(--slate);
  border-left: 4px solid var(--surface); padding-left: 22px; margin: 28px 0;
}

/* ---------- Methodology card ---------- */
.method-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 24px; margin: 28px 0;
}
.method-card h4 { font-family: var(--mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .12em; color: var(--amber-dark); margin: 0 0 14px; }
.method-card dl { display: grid; grid-template-columns: 150px 1fr; gap: 10px 16px; margin: 0; }
.method-card dt { font-weight: 600; color: var(--slate); font-size: .9rem; }
.method-card dd { margin: 0; color: var(--ink-soft); font-size: .92rem; }

/* ---------- Case study body ---------- */
.study-head { padding: 72px 0 40px; }
.meta-strip { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: .86rem; color: var(--ink-soft); margin-top: 18px; }
.meta-strip span { display: inline-flex; gap: 6px; }
.meta-strip b { color: var(--slate); font-weight: 600; }
.study-body h2 { margin-top: 46px; }
.study-body h2:first-child { margin-top: 0; }

/* ---------- Figure ---------- */
.figure { margin: 30px 0; }
.figure figcaption { font-size: .88rem; color: var(--ink-soft); margin-top: 12px; }
.figure figcaption b { color: var(--slate); }
.figure-frame { background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }

/* ---------- Research table ---------- */
.rtable { width: 100%; border-collapse: collapse; margin: 26px 0; font-size: .93rem; }
.rtable thead th {
  font-family: var(--mono); font-size: .68rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--amber-dark); text-align: left; padding: 0 14px 10px; border-bottom: 2px solid var(--line); font-weight: 500;
}
.rtable td { padding: 14px; border-bottom: 1px solid var(--line); vertical-align: top; color: var(--ink-soft); }
.rtable td:first-child { color: var(--slate); font-weight: 600; width: 34%; }
.rtable tbody tr:last-child td { border-bottom: 0; }
.rtable tr.key td { background: #fbeede; }
.rtable tr.key td:last-child { color: var(--amber-dark); font-weight: 600; }

/* ---------- Paper / citation block ---------- */
.paper-ref { background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--green); border-radius: var(--radius); padding: 20px 22px; margin: 28px 0; }
.paper-ref h4 { font-family: var(--mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .12em; color: var(--green); margin: 0 0 10px; }
.paper-ref__title { font-weight: 600; color: var(--slate); font-size: 1rem; line-height: 1.4; }
.paper-ref__apa { font-size: .88rem; color: var(--ink-soft); margin: 10px 0 14px; line-height: 1.55; }
.paper-ref__links { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.paper-ref__copy { font-family: var(--mono); font-size: .76rem; color: var(--slate); background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; cursor: pointer; }
.paper-ref__copy:hover { border-color: var(--slate); }
.paper-ref__note { font-size: .85rem; color: var(--ink-soft); margin-top: 12px; }

/* ---------- Publications ---------- */
.pub {
  background: var(--surface-2); border: 1px solid var(--line); border-left: 4px solid var(--slate);
  border-radius: var(--radius-sm); padding: 24px 26px; margin-bottom: 18px;
}
.pub--green { border-left-color: var(--green); }
.pub--amber { border-left-color: var(--amber); }
.pub__finding { font-family: var(--serif); font-size: 1.28rem; color: var(--slate); margin: 0 0 12px; line-height: 1.3; }
.pub__cite { font-size: .92rem; color: var(--ink-soft); margin: 0 0 10px; }
.pub__cite em { color: var(--slate); font-style: normal; font-weight: 600; }
.pub__sowhat { font-size: .95rem; color: var(--ink-soft); margin: 0 0 14px; }
.pub__links { display: flex; gap: 10px; flex-wrap: wrap; }
.chip {
  font-family: var(--mono); font-size: .76rem; padding: 6px 12px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--line); color: var(--slate);
}
.chip:hover { border-color: var(--slate); }

/* ---------- Timeline ---------- */
.timeline { border-left: 2px solid var(--line); margin: 20px 0; padding-left: 26px; }
.tl-item { position: relative; padding-bottom: 26px; }
.tl-item::before { content: ''; position: absolute; left: -33px; top: 4px; width: 12px; height: 12px; border-radius: 50%; background: var(--amber); border: 2px solid var(--bg); }
.tl-item h4 { font-family: var(--sans); font-size: 1rem; color: var(--slate); margin: 0 0 2px; }
.tl-when { font-family: var(--mono); font-size: .78rem; color: var(--ink-soft); }
.tl-item p { font-size: .95rem; color: var(--ink-soft); margin: 6px 0 0; }

/* ---------- Skills grid ---------- */
.skills { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.skillcol h4 { font-family: var(--mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .1em; color: var(--amber-dark); margin: 0 0 12px; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { font-size: .82rem; padding: 5px 12px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); color: var(--ink-soft); }

/* ---------- Filter bar (visual) ---------- */
.filterbar { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 30px; }
.filterbar span { font-family: var(--mono); font-size: .78rem; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-soft); background: var(--surface-2); }
.filterbar span.on { background: var(--slate); color: #fff; border-color: var(--slate); }

/* ---------- Principles ---------- */
.principle { background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.principle p { font-family: var(--serif); font-style: italic; font-size: 1.1rem; color: var(--slate); margin: 0; }

/* ---------- Contact ---------- */
.contact-links { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.contact-links a { display: inline-flex; align-items: center; gap: 10px; font-weight: 500; font-size: 1.05rem; }

/* ---------- Related / footer nav ---------- */
.study-foot { border-top: 1px solid var(--line); margin-top: 56px; padding-top: 30px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }

/* ---------- Footer ---------- */
.footer { background: var(--slate); color: #c8d2e2; padding: 52px 0 40px; margin-top: 0; }
.footer a { color: #dfe6f0; }
.footer a:hover { color: #fff; }
.footer__grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 28px; }
.footer__brand { font-family: var(--serif); font-size: 1.2rem; color: #fff; }
.footer__brand span { color: var(--amber); }
.footer__tag { font-size: .9rem; max-width: 34ch; margin-top: 8px; }
.footer__links { display: flex; gap: 22px; flex-wrap: wrap; align-items: center; }
.footer__fine { border-top: 1px solid rgba(255,255,255,.14); margin-top: 32px; padding-top: 20px; font-size: .82rem; color: #9fb0c8; }

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.divider { height: 1px; background: var(--line); border: 0; margin: 0; }
section[id] { scroll-margin-top: 82px; }
.sublabel { font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--amber-dark); margin: 0 0 12px; font-weight: 500; }
.awards { list-style: none; padding: 0; margin: 0; }
.awards li { position: relative; padding-left: 20px; margin-bottom: 10px; font-size: .96rem; color: var(--ink-soft); }
.awards li::before { content: ''; position: absolute; left: 0; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: var(--amber); }
.awards li b { color: var(--slate); font-weight: 600; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .grid-3, .grid-2, .skills { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 26px 12px; }
  .nav__links { display: none; }
  .nav__links.open { display: flex; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 24px 16px; }
  .nav__links.open a { padding: 10px 0; border-bottom: 1px solid var(--line); }
  .nav__toggle { display: block; }
  .method-card dl { grid-template-columns: 1fr; gap: 4px; }
  .method-card dt { margin-top: 8px; }
  .section { padding: 54px 0; }
  .hero { padding: 60px 0 50px; }
}