/* =========================================================================
   North Bay Digital Foundry — Systematic Grid
   Design tokens derived from the Claude Design "Variant C" wireframe.
   ========================================================================= */

:root {
  /* --- Surfaces (warm paper palette) --- */
  --paper:        #E9E7DF; /* page background            */
  --surface:      #FCFBF7; /* primary card / content     */
  --surface-alt:  #F4F2EA; /* sidebar, spec block, tints */
  --surface-tint: #F0EEE6; /* icon chips, thumbnails     */

  /* --- Ink & text --- */
  --ink:    #1A1A18; /* primary text + structural borders */
  --muted:  #6B675C; /* secondary text                    */
  --faint:  #8A867A; /* metadata, eyebrows                */

  /* --- Lines --- */
  --line:        #E5E2D9; /* hairline dividers   */
  --line-strong: #1A1A18; /* structural borders  */
  --dash:        #C4C0B5; /* dashed dividers     */

  /* --- Accent (ember) & status --- */
  --accent:     #DC5B26;
  --accent-ink: #FCFBF7;
  --status-wip: #C4C0B5;

  /* --- Type --- */
  --font: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;

  /* --- Layout --- */
  --shell-max: 1100px;
  --rail-w: 230px;
  --radius: 14px;
  --radius-sm: 8px;
  --pad-section: clamp(24px, 4vw, 36px);
}

/* =========================================================================
   Reset / base
   ========================================================================= */

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.006em;
  font-feature-settings: 'cv05' 1;          /* clearer l / I / 1 */
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  color: var(--ink);
  background: var(--paper);
}

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

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

:focus-visible {
  outline: 2.5px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* Tabular, slashed-zero figures for data / code contexts */
.tnum { font-feature-settings: 'tnum' 1, 'zero' 1, 'cv05' 1; }

/* Visually-hidden but screen-reader available */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Skip link */
.skip-link {
  position: absolute; left: 12px; top: -48px;
  background: var(--ink); color: var(--surface);
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-weight: 600; z-index: 100;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 12px; }

/* =========================================================================
   Shell — bordered card holding rail + content
   ========================================================================= */

.shell {
  max-width: var(--shell-max);
  margin: clamp(20px, 4vw, 48px) auto;
  background: var(--surface);
  border: 2px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: 7px 7px 0 rgba(26, 26, 24, 0.13);
  overflow: hidden;
  display: grid;
  grid-template-columns: var(--rail-w) 1fr;
}

/* =========================================================================
   Rail — left index / navigation
   ========================================================================= */

.rail {
  border-right: 2px solid var(--line-strong);
  background: var(--surface-alt);
  padding: 26px 20px;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.rail__top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 22px; height: 22px;
  border: 2.5px solid var(--ink);
  border-radius: 6px;
  flex: none;
}

.brand-name {
  font-weight: 700;
  letter-spacing: -0.022em;
  font-size: 18px;
}

.rail__toggle {
  display: none; /* shown on mobile */
  margin-left: auto;
  appearance: none;
  background: transparent;
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.rail__nav ol {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.rail__nav a {
  display: block;
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--muted);
  font-feature-settings: 'tnum' 1, 'zero' 1;
  transition: background 0.12s ease, color 0.12s ease;
}

.rail__nav a:hover { background: rgba(26, 26, 24, 0.06); }

.rail__nav a[aria-current="true"] {
  background: var(--ink);
  color: var(--surface);
}

.rail__meta {
  margin: auto 0 0;
  font-size: 11px;
  color: var(--faint);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-feature-settings: 'tnum' 1, 'zero' 1;
}

/* =========================================================================
   Content sections
   ========================================================================= */

.content { min-width: 0; } /* allow grid children to shrink */

.section {
  padding: var(--pad-section);
  border-bottom: 2px solid var(--line-strong);
}
.section:last-child { border-bottom: 0; }

.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--faint);
  margin: 0 0 6px;
  font-feature-settings: 'tnum' 1, 'zero' 1;
  text-transform: uppercase;
}

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.section__title {
  font-size: clamp(1.35rem, 3vw, 1.625rem);
  font-weight: 700;
  letter-spacing: -0.022em;
  margin: 0;
}

.link-accent {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.014em;
  color: var(--accent);
}
.link-accent:hover { text-decoration: underline; }

/* =========================================================================
   Hero (overview)
   ========================================================================= */

.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  border-bottom: 2px solid var(--line-strong);
}

.hero__main { padding: clamp(28px, 4vw, 44px) var(--pad-section); }

.hero__kicker {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin: 0 0 16px;
  font-feature-settings: 'tnum' 1, 'zero' 1;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.04;
  margin: 0;
}

.hero__lede {
  font-size: clamp(1rem, 2vw, 1.0625rem);
  line-height: 1.55;
  color: var(--muted);
  margin: 16px 0 0;
  max-width: 44ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

/* Spec block */
.spec {
  border-left: 2px dashed var(--dash);
  padding: clamp(24px, 3vw, 34px) 28px;
  background: var(--surface-alt);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.spec__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 11px;
  border-bottom: 1.5px solid var(--line);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.03em;
  font-feature-settings: 'tnum' 1, 'zero' 1;
}
.spec__row:last-child { border-bottom: 0; padding-bottom: 0; }
.spec__label { color: var(--faint); }
.spec__value {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* =========================================================================
   Buttons
   ========================================================================= */

.btn {
  display: inline-block;
  font-weight: 600;
  letter-spacing: -0.014em;
  font-size: 16px;
  padding: 10px 22px;
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: transparent;
  color: var(--ink);
  transition: transform 0.08s ease, box-shadow 0.12s ease;
}
.btn:hover { transform: translate(-1px, -1px); box-shadow: 2px 2px 0 rgba(26,26,24,0.18); }
.btn:active { transform: translate(0, 0); box-shadow: none; }

.btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
}

/* =========================================================================
   Capabilities matrix
   ========================================================================= */

.matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 2px solid var(--line-strong);
  border-radius: 10px;
  overflow: hidden;
}

.matrix__cell {
  padding: 22px;
  border-right: 2px solid var(--line-strong);
  border-bottom: 2px solid var(--line-strong);
}
/* remove rightmost column right-borders and last row bottom-borders */
.matrix__cell:nth-child(3n) { border-right: 0; }
.matrix__cell:nth-last-child(-n+3) { border-bottom: 0; }

.matrix__icon {
  width: 32px; height: 32px;
  border: 2px solid var(--ink);
  border-radius: 7px;
  margin-bottom: 12px;
  background: var(--surface-tint);
}

.matrix__name {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.014em;
  margin: 0 0 8px;
}

.matrix__desc {
  font-size: 13px;
  line-height: 1.45;
  color: var(--muted);
  margin: 0;
}

.matrix__cta {
  background: var(--surface-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.014em;
  color: var(--accent);
}

/* =========================================================================
   Projects grid
   ========================================================================= */

.projects {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  border: 2px solid var(--line-strong);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  transition: transform 0.1s ease, box-shadow 0.14s ease;
}
.card:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 rgba(26,26,24,0.15); }

.card__thumb {
  height: 92px;
  border-bottom: 2px solid var(--line-strong);
  background-color: var(--surface-tint);
  background-image:
    linear-gradient(to top right, transparent calc(50% - 1px), var(--dash) calc(50% - 1px), var(--dash) calc(50% + 1px), transparent calc(50% + 1px)),
    linear-gradient(to top left,  transparent calc(50% - 1px), var(--dash) calc(50% - 1px), var(--dash) calc(50% + 1px), transparent calc(50% + 1px));
}

.card__body {
  padding: 14px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card__cat {
  font-size: 10px;
  color: var(--faint);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin: 0 0 7px;
  font-feature-settings: 'tnum' 1, 'zero' 1;
}

.card__title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.014em;
  line-height: 1.1;
  margin: 0 0 8px;
}

.card__desc {
  font-size: 13px;
  line-height: 1.45;
  color: var(--muted);
  margin: 0 0 12px;
}

.card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1.5px solid var(--line);
  padding-top: 10px;
  margin-top: auto;
}

.status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-feature-settings: 'tnum' 1, 'zero' 1;
}

.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}
.dot--wip { background: var(--status-wip); }

.card__arrow { font-size: 14px; color: var(--accent); }

/* =========================================================================
   Lab log table
   ========================================================================= */

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.log {
  width: 100%;
  border: 2px solid var(--line-strong);
  border-radius: 10px;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.03em;
  font-feature-settings: 'tnum' 1, 'zero' 1;
  min-width: 520px;
}

.log thead th {
  text-align: left;
  background: var(--surface-alt);
  border-bottom: 2px solid var(--line-strong);
  color: var(--faint);
  font-weight: 600;
  letter-spacing: 0.06em;
  font-size: 11px;
  padding: 11px 16px;
}

.log tbody td {
  padding: 13px 16px;
  border-bottom: 1.5px solid var(--line);
  color: var(--muted);
  vertical-align: middle;
}
.log tbody tr:last-child td { border-bottom: 0; }

.log__exp { color: var(--ink); font-weight: 500; }
.log .status { font-size: 12px; }

/* =========================================================================
   Writing list
   ========================================================================= */

.writing {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 28px;
  margin-bottom: 32px;
}

.post {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-bottom: 1.5px solid var(--line);
  padding-bottom: 16px;
}

.post__title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.014em;
  margin: 0;
  line-height: 1.25;
}
.post:hover .post__title { color: var(--accent); }

.post__meta {
  font-size: 12px;
  color: var(--faint);
  letter-spacing: 0.04em;
  font-feature-settings: 'tnum' 1, 'zero' 1;
}

/* =========================================================================
   Contact CTA
   ========================================================================= */

.cta {
  border: 2.5px solid var(--line-strong);
  border-radius: 10px;
  padding: clamp(20px, 3vw, 26px);
  background: var(--surface-alt);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.cta__title {
  font-size: clamp(1.2rem, 2.5vw, 1.4375rem);
  font-weight: 700;
  letter-spacing: -0.022em;
  margin: 0;
}

/* =========================================================================
   Page footer
   ========================================================================= */

.colophon {
  max-width: var(--shell-max);
  margin: 0 auto clamp(24px, 4vw, 48px);
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--faint);
  letter-spacing: 0.02em;
}
.colophon a:hover { color: var(--ink); }

/* =========================================================================
   Responsive
   ========================================================================= */

/* Tablet: tighten matrix / projects to 2 columns */
@media (max-width: 860px) {
  .matrix { grid-template-columns: repeat(2, 1fr); }
  .matrix__cell:nth-child(3n) { border-right: 2px solid var(--line-strong); }
  .matrix__cell:nth-child(2n) { border-right: 0; }
  .matrix__cell:nth-last-child(-n+3) { border-bottom: 2px solid var(--line-strong); }
  .matrix__cell:nth-last-child(-n+2) { border-bottom: 0; }

  .projects { grid-template-columns: repeat(2, 1fr); }
}

/* Collapse rail into a top bar */
@media (max-width: 760px) {
  .shell {
    grid-template-columns: 1fr;
    margin: 16px;
  }

  .rail {
    border-right: 0;
    border-bottom: 2px solid var(--line-strong);
    padding: 16px 18px;
    gap: 16px;
  }

  .rail__top { gap: 10px; }
  .rail__toggle { display: inline-block; }

  .rail__nav {
    display: none;
  }
  .rail__nav.is-open { display: block; }

  .rail__nav ol { gap: 2px; }

  .rail__meta { display: none; }

  .hero { grid-template-columns: 1fr; }
  .spec {
    border-left: 0;
    border-top: 2px dashed var(--dash);
  }
}

@media (max-width: 540px) {
  .matrix { grid-template-columns: 1fr; }
  .matrix__cell { border-right: 0 !important; border-bottom: 2px solid var(--line-strong) !important; }
  .matrix__cell:last-child { border-bottom: 0 !important; }

  .projects { grid-template-columns: 1fr; }
  .writing { grid-template-columns: 1fr; }

  .section__head { align-items: flex-start; }
  .hero__actions .btn { flex: 1; text-align: center; }
}