/* Caleb Andersen — portfolio
   Set like a printed document: one text serif for everything you read,
   a quiet mono for technical labels and code. Warm paper, near-black ink,
   a single muted claret used sparingly. No decoration for its own sake. */

:root {
  --paper: #f6f3ec;
  --paper-2: #efe9dd;
  --ink: #221d16;
  --ink-soft: #4b4339;
  --muted: #847868;
  --line: #e3ddd0;
  --line-strong: #c9bea9;

  --accent: oklch(0.47 0.10 30);
  --accent-deep: oklch(0.39 0.10 30);

  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --wrap: 880px;
  --measure: 64ch;
  --pad: clamp(22px, 6vw, 56px);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-size: 19px;
  line-height: 1.62;
  font-feature-settings: "kern" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.page { position: relative; }

a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: var(--paper); }

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

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
  z-index: 100;
  font-family: var(--mono);
  font-size: 13px;
}
.skip:focus { left: 16px; top: 16px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

/* ---------- small technical labels ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0;
}
.eyebrow b { color: var(--accent); font-weight: 500; }

/* ---------- header ---------- */
.site-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-top: 30px;
  padding-bottom: 22px;
  flex-wrap: wrap;
}

.mark { display: flex; align-items: baseline; gap: 13px; }
.mark .name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.01em;
  line-height: 1;
}
.mark .reg {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.site-nav {
  display: flex;
  align-items: baseline;
  gap: 24px;
  font-family: var(--mono);
  font-size: 13px;
}
.site-nav a {
  color: var(--ink-soft);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.site-nav a:hover { color: var(--ink); border-color: var(--line-strong); }
.site-nav .cv { color: var(--accent); }
.site-nav .cv:hover { border-color: var(--accent); }

.rule { height: 1px; background: var(--line-strong); border: 0; margin: 0; }

/* ---------- hero ---------- */
.hero {
  padding-top: clamp(52px, 9vw, 104px);
  padding-bottom: clamp(20px, 5vw, 48px);
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(33px, 5.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  margin: 20px 0 0;
  max-width: 18ch;
  text-wrap: balance;
}
.hero h1 em { font-style: italic; color: var(--accent); }

.hero-lede {
  margin: 28px 0 0;
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.6;
  max-width: var(--measure);
  color: var(--ink-soft);
}
.hero-lede a,
.case-body a:not(.link-inline),
.contact-line a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--line-strong);
}
.hero-lede a:hover { text-decoration-color: var(--accent); }

.hero-cta {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 13px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 17px;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.btn:hover { border-color: var(--ink); }
.btn .arr { transition: transform 0.2s ease; }
.btn:hover .arr { transform: translate(2px, -2px); }

.link-inline {
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.link-inline:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- section scaffolding ---------- */
.section { padding-top: clamp(58px, 8vw, 104px); }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 12px;
  margin-bottom: 4px;
}
.section-head h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(22px, 2.8vw, 28px);
  letter-spacing: -0.01em;
  margin: 0;
  white-space: nowrap;
  flex-shrink: 0;
}
.section-head .idx {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- work index ---------- */
.work-list { display: block; }
.entry {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  gap: 0 30px;
  align-items: baseline;
  padding: 30px 2px 30px 0;
  border-bottom: 1px solid var(--line);
}
.entry:hover .entry-title { color: var(--accent); }

.entry-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}
.entry-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 8px;
}
.entry-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0;
  transition: color 0.2s ease;
}
.entry-what {
  margin: 10px 0 0;
  max-width: 54ch;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.55;
}
.entry-meta {
  margin-top: 15px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px 9px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}
.tag {
  border: 1px solid var(--line-strong);
  padding: 3px 9px;
  color: var(--ink-soft);
  white-space: nowrap;
}
.entry-side {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  white-space: nowrap;
}
.metric { line-height: 1.2; }
.metric b {
  display: block;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 21px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.metric span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.entry-go {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  display: inline-flex;
  gap: 7px;
  align-items: center;
}
.entry-go .arr { transition: transform 0.2s ease; }
.entry:hover .entry-go .arr { transform: translateX(3px); }

/* ---------- how I work ---------- */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  column-gap: 48px;
  row-gap: 34px;
  margin-top: 34px;
}
.principle { max-width: 46ch; }
.principle .n {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.04em;
}
.principle h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.005em;
  margin: 8px 0 8px;
}
.principle p {
  margin: 0;
  font-size: 17px;
  color: var(--ink-soft);
  line-height: 1.55;
}
.principle em { font-style: italic; }

.belief {
  margin: 52px 0 0;
  padding-left: 22px;
  border-left: 2px solid var(--accent);
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.4;
  letter-spacing: -0.005em;
  max-width: 34ch;
  color: var(--ink);
}
.belief .by {
  display: block;
  margin-top: 14px;
  font-family: var(--mono);
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- contact ---------- */
.contact-line {
  margin: 32px 0 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 36px);
  letter-spacing: -0.015em;
  line-height: 1.18;
  max-width: 22ch;
}
.contact-line a { white-space: nowrap; }

.contact-links {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  border-top: 1px solid var(--line-strong);
}
.contact-links a {
  border-bottom: 1px solid var(--line);
  padding: 20px 2px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: padding-left 0.2s ease;
}
.contact-links a:hover { padding-left: 8px; }
.contact-links .k {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.contact-links .v {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.contact-links a:hover .v { color: var(--accent); }

/* ---------- footer ---------- */
.site-foot {
  margin-top: clamp(64px, 9vw, 116px);
  padding-top: 22px;
  padding-bottom: 44px;
  border-top: 1px solid var(--line-strong);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ============ CASE STUDY PAGES ============ */
.backlink {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
  display: inline-flex;
  gap: 8px;
  align-items: center;
}
.backlink:hover { color: var(--accent); }
.backlink .arr { transition: transform 0.2s ease; }
.backlink:hover .arr { transform: translateX(-3px); }

.case-head { padding-top: clamp(36px, 6vw, 64px); }
.case-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.case-head h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(36px, 6vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 16px 0 0;
}
.case-tagline {
  margin: 20px 0 0;
  font-size: clamp(19px, 2.2vw, 23px);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: var(--measure);
}

.spec {
  margin: 38px 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}
.spec div {
  padding: 16px 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.spec dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 7px;
}
.spec dd {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.35;
}
.spec dd a { color: var(--accent); border-bottom: 1px solid var(--accent); }

.case-body { max-width: var(--measure); }
.case-body .block { padding-top: clamp(46px, 6vw, 78px); }
.case-body h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(22px, 2.8vw, 28px);
  letter-spacing: -0.01em;
  margin: 0 0 4px;
  display: flex;
  align-items: baseline;
  gap: 13px;
}
.case-body h2 .n {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.04em;
}
.case-body p { margin: 16px 0 0; }
.case-body strong { font-weight: 600; }
.case-body em { font-style: italic; }

.decision-list { margin: 20px 0 0; padding: 0; list-style: none; }
.decision-list li {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.decision-list li:last-child { border-bottom: 1px solid var(--line); }
.decision-list h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.005em;
  margin: 0 0 6px;
}
.decision-list .tradeoff {
  margin: 8px 0 0;
  font-size: 16px;
  color: var(--muted);
}
.decision-list .tradeoff b {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--accent);
  font-weight: 500;
  margin-right: 8px;
}

.outcome-grid {
  margin: 24px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 40px;
}
.outcome-grid .metric b { font-size: 22px; }

.case-next {
  margin-top: clamp(56px, 8vw, 100px);
  border-top: 1px solid var(--line-strong);
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}
.case-next .eyebrow { font-size: 12px; }
.case-next .nxt {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: -0.01em;
}
.case-next .nxt a:hover { color: var(--accent); }

/* inline code */
code, .kbd {
  font-family: var(--mono);
  font-size: 0.82em;
  background: var(--paper-2);
  border: 1px solid var(--line);
  padding: 1px 5px;
  border-radius: 2px;
}

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  body { font-size: 18px; }
  .site-nav { gap: 16px; font-size: 12px; }
  .site-nav .hide-sm { display: none; }
  .entry {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .entry-num { display: none; }
  .entry-side {
    align-items: flex-start;
    text-align: left;
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 440px) {
  .mark { flex-direction: column; gap: 3px; }
  .hero-cta .btn { width: 100%; justify-content: center; }
}