/* =========================================================================
   Margin House - shared styles
   Visual system per brand handoff. Light mode default.
   Saturation for moments (brand palette), restraint for duration (deck palette).
   No gradients, no glow, no drop shadows on the mark, no em-dashes in copy.
   ========================================================================= */

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

:root {
  /* Brand palette - moments only (hero, CTAs, identity) */
  --pine:      #36492E;
  --lichen:    #7A8654;
  --oak:       #B89240;
  --cedar:     #7A4F2E;
  --parchment: #EFE8D6;
  --soil:      #2A2620;
  --bark:      #9B8060;

  /* Deck palette - duration (body content, long reads) */
  --pine-muted: #4A5A42;
  --sage:       #8A9472;
  --brass:      #A8895A;
  --bark-muted: #6B5C48;
  --paper:      #F2EDE0;
  --ink:        #2D2A24;
  --stone:      #6B6660;

  /* Type */
  --serif: 'Crimson Pro', 'Crimson Text', 'Source Serif Pro', Cambria, serif;
  --sans:  'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono:  'JetBrains Mono', 'SF Mono', Menlo, Consolas, ui-monospace, monospace;

  /* Layout */
  --measure: 44rem;     /* editorial reading column */
  --wide:    66rem;     /* nav, footer, hero band */
  --gap:     clamp(2.5rem, 6vw, 5rem);
}

/* ---------- reset ---------- */
*, *::before, *::after { 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-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--pine-muted); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--pine); }

/* ---------- type scale ---------- */
h1, h2, h3 { font-family: var(--serif); font-weight: 700; color: var(--pine-muted); line-height: 1.15; margin: 0; }
h1 { font-size: clamp(2.75rem, 6vw, 4rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(2rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.375rem, 2.4vw, 1.625rem); }
p  { margin: 0 0 1.1em; }

.eyebrow,
.label {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.6875rem;          /* 11px */
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--pine-muted);
}

.tagline {
  font-family: var(--mono);
  font-weight: 500;
  font-size: clamp(0.75rem, 1.4vw, 0.875rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cedar);   /* warm wood tone, passes WCAG AA on Paper; Oak reserved for decorative accents */
}

/* small UI / metadata text uses the sans face */
.ui, .meta, nav, .site-footer { font-family: var(--sans); }
.meta { font-size: 0.8125rem; color: var(--stone); }

/* ---------- layout helpers ---------- */
.wrap { width: 100%; max-width: var(--wide); margin-inline: auto; padding-inline: clamp(1.25rem, 5vw, 2.5rem); }
.measure { max-width: var(--measure); }
.section { padding-block: var(--gap); }
.center { text-align: center; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--brass);
}
.nav-wrap {
  max-width: var(--wide); margin-inline: auto;
  padding: 0.9rem clamp(1.25rem, 5vw, 2.5rem);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--pine); }
.brand:hover { color: var(--pine); }
.brand .mark { width: 30px; height: 30px; }
.brand .wordmark {
  font-family: var(--serif); font-weight: 700; font-size: 1.3rem;
  color: var(--pine); letter-spacing: -0.01em; line-height: 1;
}

.nav-desktop { display: flex; align-items: center; gap: 1.6rem; font-size: 0.9rem; }
.nav-desktop a { text-decoration: none; color: var(--ink); }
.nav-desktop a:not(.cta):hover { color: var(--pine); }

.cta {
  display: inline-block; font-family: var(--sans); font-weight: 500;
  background: var(--pine); color: var(--parchment);
  padding: 0.55rem 1.1rem; border-radius: 2px; text-decoration: none;
  font-size: 0.9rem; line-height: 1; transition: background .15s ease;
}
.cta:hover { background: var(--soil); color: var(--parchment); }
/* nav anchor selectors are more specific than .cta; restore button text color */
.nav-desktop a.cta, .nav-desktop a.cta:hover,
.nav-mobile .menu a.cta, .nav-mobile .menu a.cta:hover { color: var(--parchment); }

/* no-JS mobile menu via <details> */
.nav-mobile { display: none; position: relative; }
.nav-mobile summary {
  list-style: none; cursor: pointer; font-family: var(--mono); font-weight: 500;
  font-size: 0.6875rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--pine-muted); padding: 0.4rem 0.2rem;
}
.nav-mobile summary::-webkit-details-marker { display: none; }
.nav-mobile[open] summary { color: var(--pine); }
.nav-mobile .menu {
  position: absolute; right: 0; top: calc(100% + 0.6rem);
  background: var(--paper); border: 1px solid var(--brass);
  display: flex; flex-direction: column; min-width: 13rem; padding: 0.4rem;
}
.nav-mobile .menu a { text-decoration: none; color: var(--ink); padding: 0.7rem 0.8rem; font-size: 0.95rem; }
.nav-mobile .menu a:hover { background: var(--parchment); }
.nav-mobile .menu .cta { margin: 0.4rem; text-align: center; }

@media (max-width: 760px) {
  .nav-desktop { display: none; }
  .nav-mobile { display: block; }
}

/* ---------- hero ---------- */
.hero { padding-block: clamp(3.5rem, 9vw, 7rem) clamp(2.5rem, 6vw, 4.5rem); text-align: center; }
.hero .mark-hero { width: clamp(76px, 12vw, 104px); height: auto; margin: 0 auto 1.6rem; }
.hero h1 { color: var(--pine); margin-bottom: 0.7rem; }
.hero .tagline { display: block; margin-bottom: 1.6rem; }
.hero .lede {
  font-size: clamp(1.125rem, 2.2vw, 1.375rem);
  color: var(--ink); max-width: 34rem; margin: 0 auto 2rem;
}
.hero .cta { font-size: 0.95rem; padding: 0.7rem 1.4rem; }

/* hairline divider */
.rule { border: 0; border-top: 1px solid var(--brass); margin: 0; }
.rule-soft { border: 0; border-top: 1px solid var(--bark); opacity: 0.5; margin: 0; }

/* ---------- three blocks ---------- */
.blocks { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 4vw, 3rem); }
.block { padding-top: 1.25rem; border-top: 2px solid var(--brass); }
.block h3 { margin-bottom: 0.6rem; }
.block p { font-size: 1.0625rem; line-height: 1.55; margin-bottom: 0; }
@media (max-width: 760px) { .blocks { grid-template-columns: 1fr; } }

/* ---------- generic page content ---------- */
.page-head { padding-block: clamp(2.75rem, 7vw, 4.5rem) clamp(1.5rem, 3vw, 2rem); }
.page-head .eyebrow { display: block; margin-bottom: 0.9rem; }
.page-head h1 { color: var(--pine); }
.page-head .lede { font-size: clamp(1.125rem, 2vw, 1.3rem); color: var(--ink); margin-top: 1rem; max-width: 42rem; }

.content h2 { margin-top: 0; margin-bottom: 0.6rem; }
.content .stack > * + * { margin-top: 0; }
.content section + section { margin-top: clamp(2.5rem, 5vw, 3.75rem); }
.content section .label { display: block; margin-bottom: 0.6rem; }
.content p { font-size: 1.0625rem; }

/* pull quote */
.pull {
  font-style: italic; font-size: clamp(1.3rem, 2.6vw, 1.6rem);
  color: var(--pine-muted); line-height: 1.4;
  border-top: 1px solid var(--brass); border-bottom: 1px solid var(--brass);
  padding-block: 1.4rem; margin-block: 2.2rem;
}

/* founder layout */
.founder { display: grid; grid-template-columns: 240px 1fr; gap: clamp(1.75rem, 4vw, 3rem); align-items: start; }
.portrait {
  width: 100%; aspect-ratio: 4 / 5; background: var(--parchment);
  border: 1px solid var(--bark); object-fit: cover; display: block;
}
.founder dl { margin: 0; }
.founder dt { font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--pine-muted); margin-top: 1.2rem; }
.founder dd { margin: 0.25rem 0 0; font-family: var(--sans); font-size: 0.95rem; color: var(--ink); }
@media (max-width: 680px) { .founder { grid-template-columns: 1fr; } .portrait { max-width: 220px; } }

/* contact */
.contact-block { margin-top: 1.5rem; }
.contact-block .big-link { font-family: var(--serif); font-size: clamp(1.4rem, 4vw, 2rem); color: var(--pine); text-decoration: none; }
.contact-block .big-link:hover { text-decoration: underline; text-decoration-color: var(--oak); }
.contact-meta { font-family: var(--sans); font-size: 0.95rem; color: var(--stone); margin-top: 1.75rem; line-height: 1.9; }
.contact-meta a { color: var(--pine-muted); }

/* decorative cabin band (home, atmosphere only) */
.atmos { padding-block: clamp(2rem, 5vw, 3.5rem); text-align: center; }
.atmos svg { width: clamp(200px, 40vw, 320px); margin: 0 auto; opacity: 0.92; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--brass); background: var(--paper); margin-top: clamp(3rem, 7vw, 5rem); }
.footer-grid {
  max-width: var(--wide); margin-inline: auto;
  padding: clamp(2rem, 5vw, 3rem) clamp(1.25rem, 5vw, 2.5rem);
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 1.5rem; align-items: start;
}
.footer-brand { display: flex; align-items: center; gap: 0.6rem; }
.footer-brand .mark { width: 26px; height: 26px; }
.footer-brand .wm { font-family: var(--serif); font-weight: 700; font-size: 1.05rem; color: var(--pine); line-height: 1; }
.footer-loc { font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--stone); margin-top: 0.5rem; }
.footer-nav { display: flex; flex-direction: column; gap: 0.5rem; font-size: 0.875rem; }
.footer-nav a { color: var(--ink); text-decoration: none; }
.footer-nav a:hover { color: var(--pine); }
.footer-right { text-align: right; font-size: 0.8125rem; color: var(--stone); line-height: 1.9; }
.footer-right a { color: var(--pine-muted); text-decoration: none; }
.footer-right a:hover { color: var(--pine); }
.footer-label { font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--pine-muted); }
@media (max-width: 680px) {
  .footer-grid { grid-template-columns: 1fr; gap: 1.75rem; text-align: left; }
  .footer-right { text-align: left; }
}

/* ---------- a11y ---------- */
:focus-visible { outline: 2px solid var(--oak); outline-offset: 2px; }
.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--pine); color: var(--parchment); padding: 0.6rem 1rem;
  font-family: var(--sans); font-size: 0.9rem; z-index: 100;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* ---------- founder-forward hero (home) ---------- */
.hero-lead { padding-block: clamp(3rem, 7vw, 5.5rem) clamp(2rem, 5vw, 3.5rem); }
.hero-lead .eyebrow { display: block; margin-bottom: 0.7rem; }
.hero-lead h1 { color: var(--pine); font-size: clamp(2.9rem, 7vw, 4.5rem); margin: 0 0 1.25rem; }
.hero-credential { font-size: clamp(1.15rem, 2.1vw, 1.4rem); line-height: 1.55; color: var(--ink); max-width: 46rem; }
.hero-credential strong { font-weight: 700; color: var(--pine-muted); }
.hero-bridge { font-size: clamp(1.05rem, 1.8vw, 1.2rem); color: var(--pine-muted); max-width: 42rem; margin-top: 1.2rem; }
.hero-lead .cta { margin-top: 1.9rem; font-size: 0.95rem; padding: 0.7rem 1.4rem; }

/* ---------- selected work cards ---------- */
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1.6rem; flex-wrap: wrap; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2rem); }
.section-head .more { font-family: var(--sans); font-size: 0.875rem; white-space: nowrap; }
.workcards { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.25rem, 3vw, 2.25rem); }
.workcard { border-top: 2px solid var(--brass); padding-top: 1.1rem; }
.workcard .label { display: block; margin-bottom: 0.5rem; }
.workcard h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.workcard p { font-size: 1rem; line-height: 1.5; margin-bottom: 0; }
@media (max-width: 760px) { .workcards { grid-template-columns: 1fr; } }

/* ---------- work page case studies ---------- */
.case { border-top: 1px solid var(--brass); padding-top: 1.5rem; }
.case + .case { margin-top: clamp(2.5rem, 5vw, 3.75rem); }
.case .label { display: block; margin-bottom: 0.6rem; }
.case h2 { font-size: clamp(1.5rem, 2.8vw, 1.9rem); margin-bottom: 0.7rem; }
.case .result {
  font-family: var(--sans); font-size: 0.95rem; color: var(--pine-muted);
  border-left: 2px solid var(--brass); padding-left: 0.9rem; margin-top: 1rem;
}
.case .result strong { color: var(--pine); font-weight: 600; }

/* ---------- thinking: article pages ---------- */
.byline { font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--stone); margin-top: 0.9rem; }
.article-body { margin-top: 1.75rem; }
.article-body h2 { font-size: clamp(1.4rem, 2.6vw, 1.75rem); margin: 2.5rem 0 0.7rem; }
.article-body p { font-size: 1.0625rem; line-height: 1.72; }
.article-body p strong { color: var(--ink); font-weight: 700; }
.article-body > p:first-of-type { font-size: 1.1875rem; line-height: 1.62; color: var(--ink); }

.related { border: 1px solid var(--brass); border-radius: 4px; padding: 1.15rem 1.35rem; margin-top: 2.75rem; }
.related .label { display: block; margin-bottom: 0.45rem; }
.related p { margin: 0; font-size: 1rem; line-height: 1.5; }
.related a { font-weight: 500; }

.backlink { font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.15em; text-transform: uppercase; text-decoration: none; color: var(--pine-muted); }
.backlink:hover { color: var(--pine); }

/* ---------- thinking: index ---------- */
.thinking-item { border-top: 1px solid var(--brass); padding: 1.9rem 0; }
.thinking-item:last-child { border-bottom: 1px solid var(--brass); }
.thinking-item .date { display: block; font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--stone); margin-bottom: 0.5rem; }
.thinking-item h2 { font-size: clamp(1.6rem, 3vw, 2.05rem); margin-bottom: 0.55rem; line-height: 1.2; }
.thinking-item h2 a { color: var(--pine-muted); text-decoration: none; }
.thinking-item h2 a:hover { color: var(--pine); text-decoration: underline; text-decoration-color: var(--brass); }
.thinking-item p { font-size: 1.125rem; margin: 0; color: var(--ink); max-width: 46rem; }

/* clickable workcard titles (used for recent thinking on home) */
.workcard h3 a { color: inherit; text-decoration: none; }
.workcard h3 a:hover { text-decoration: underline; text-decoration-color: var(--brass); }

/* read-the-thinking link inside work cases */
.case .readmore { display: block; margin-top: 0.9rem; font-family: var(--sans); font-size: 0.9rem; }