/* matthew.kuykendall.org — "The Blueprint"
   Dark (default) = cyanotype: white linework on blueprint blue.
   Light = drafting paper: blue ink on warm paper.
   Toggle sets html[data-theme]; default is dark. */

:root,
:root[data-theme="dark"] {
  --paper: #0f2334;
  --grid: rgba(141, 184, 226, 0.09);
  --sheet: #142c42;
  --ink: #e9f2fa;
  --muted: #9fb9d0;
  --edge: #c8ddf0;          /* strong linework */
  --faint: #2c4763;         /* weak linework */
  --blue: #8fc6ff;          /* accent ink */
  --stamp: #ff6d55;
  --stamp-blue: #8fc6ff;
  --shadow: 6px 6px 0 rgba(0, 0, 0, 0.35);
  --glow: rgba(143, 198, 255, 0.14);
}

:root[data-theme="light"] {
  --paper: #f7f5ef;
  --grid: rgba(36, 86, 166, 0.09);
  --sheet: #ffffff;
  --ink: #16324f;
  --muted: #5a6f85;
  --edge: #16324f;
  --faint: #c6d4e8;
  --blue: #2456a6;
  --stamp: #c2452d;
  --stamp-blue: #2456a6;
  --shadow: 6px 6px 0 rgba(22, 50, 79, 0.10);
  --glow: rgba(36, 86, 166, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 26px 26px;
  font-family: ui-sans-serif, -apple-system, "Segoe UI", Roboto, Inter, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color .35s ease, color .35s ease;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.mono, .kicker, .fig, .tags, .status, .dim, .receipts, .site-footer, .dwg {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
}

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--blue); color: var(--paper); padding: .5rem 1rem;
}
.skip:focus { left: 0; z-index: 10; }

/* ---------- nav (drawing header) ---------- */
.site-nav {
  max-width: 1040px; margin: 0 auto; padding: 1rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  border-bottom: 2px solid var(--edge);
}
.brand { display: inline-flex; align-items: center; gap: .7rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.avatar {
  width: 34px; height: 34px; border-radius: 50%; display: block;
  border: 1.5px solid var(--edge);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text .dwg {
  font-size: .62rem; letter-spacing: .18em; color: var(--blue); text-transform: uppercase;
}
.brand-text .name { font-weight: 700; font-size: .98rem; letter-spacing: .01em; }
.site-nav nav { display: flex; align-items: center; gap: 1.3rem; }
.site-nav nav a {
  color: var(--muted); font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: .78rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
}
.site-nav nav a:hover { color: var(--blue); text-decoration: none; }

/* theme toggle: drafting-style sun / moon */
.theme-toggle {
  appearance: none; background: none; border: 1.5px solid var(--faint);
  border-radius: 50%; width: 38px; height: 38px; padding: 0;
  display: grid; place-items: center; cursor: pointer; color: var(--ink);
  transition: border-color .25s ease, transform .25s ease;
}
.theme-toggle:hover { border-color: var(--blue); transform: rotate(15deg); }
.theme-toggle svg { width: 20px; height: 20px; display: block; }
.theme-toggle .sun { display: none; }
.theme-toggle .moon { display: block; }
:root[data-theme="light"] .theme-toggle .sun { display: block; }
:root[data-theme="light"] .theme-toggle .moon { display: none; }

/* ---------- hero ---------- */
.hero { max-width: 1040px; margin: 0 auto; padding: 4rem 1.5rem 1.2rem; text-align: center; }
.kicker {
  font-size: .74rem; font-weight: 600; letter-spacing: .32em; text-transform: uppercase;
  color: var(--blue); margin: 0 0 .9rem;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.9rem);
  letter-spacing: -0.02em; line-height: 1.04; margin: 0 0 .5rem;
}
.dim {
  display: flex; align-items: center; gap: 10px; justify-content: center;
  max-width: 540px; margin: 1.1rem auto 0; color: var(--blue); font-size: .74rem;
  letter-spacing: .08em;
}
.dim .l { flex: 1; height: 1px; background: var(--blue); position: relative; }
.dim .l::before, .dim .l::after {
  content: ""; position: absolute; top: -4px; width: 1px; height: 9px; background: var(--blue);
}
.dim .l::before { left: 0; } .dim .l::after { right: 0; }
.lede { color: var(--muted); font-size: 1.1rem; max-width: 37rem; margin: 1.1rem auto 0; }

/* ---------- sheets (work cards) ---------- */
.work-section { max-width: 1040px; margin: 0 auto; padding: 2.6rem 1.5rem 2rem; }
.work-head { text-align: center; margin-bottom: 2.1rem; }
.work-head h2 { font-size: 1.7rem; letter-spacing: -0.015em; margin: 0 0 .5rem; }
.receipts { color: var(--muted); font-size: .8rem; letter-spacing: .05em; margin: 0; text-transform: uppercase; }
.receipts b { color: var(--stamp); }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.7rem; }

.sheet {
  position: relative; display: block; color: var(--ink);
  background: var(--sheet); border: 1.5px solid var(--edge);
  padding: 1.6rem 1.6rem 0; box-shadow: var(--shadow);
  transition: transform .3s ease, box-shadow .3s ease, background-color .35s ease;
}
.sheet:hover, .sheet:focus-visible {
  text-decoration: none; transform: translate(-2px, -4px);
  box-shadow: 9px 10px 0 var(--glow), var(--shadow);
}
.sheet .corner { position: absolute; width: 10px; height: 10px; border: 1px solid var(--faint); }
.sheet .c1 { top: 6px; left: 6px; border-right: none; border-bottom: none; }
.sheet .c2 { bottom: 6px; right: 6px; border-left: none; border-top: none; }

.stamp {
  position: absolute; top: 16px; right: 14px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-weight: 800; font-size: .76rem; letter-spacing: .15em;
  border: 2.5px solid; border-radius: 4px; padding: .15rem .6rem;
  transform: rotate(7deg); opacity: .92;
  transition: transform .25s ease;
}
.sheet:hover .stamp { transform: rotate(3deg) scale(1.06); }
.stamp-live { color: var(--stamp); border-color: var(--stamp); }
.stamp-shipped, .stamp-daily { color: var(--stamp-blue); border-color: var(--stamp-blue); }

.fig {
  font-size: .66rem; font-weight: 600; letter-spacing: .2em; text-transform: uppercase;
  color: var(--blue); margin: 0 0 .6rem; padding-right: 5.5rem;
}
.sheet h3 { margin: 0 0 .45rem; font-size: 1.28rem; letter-spacing: -0.01em; }
.sheet .desc { color: var(--muted); font-size: .95rem; margin: 0 0 1.15rem; min-height: 4.1rem; }

.tblock {
  display: grid; grid-template-columns: 1fr auto; align-items: center;
  border-top: 1.5px solid var(--edge); margin: 0 -1.6rem;
}
.tblock .cell {
  padding: .5rem .8rem;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: .62rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted);
}
.tblock .cell b { display: block; color: var(--ink); font-size: .74rem; letter-spacing: .03em; }
.tblock .go {
  padding: .5rem 1rem; border-left: 1px solid var(--faint);
  color: var(--muted); font-size: 1rem; align-self: stretch; display: grid; place-items: center;
  transition: transform .25s ease, color .25s ease;
}
.sheet:hover .go { color: var(--blue); transform: translateX(4px); }

/* ---------- inner pages ---------- */
.page-head, .case { max-width: 780px; margin: 0 auto; padding: 2.6rem 1.5rem 2rem; }
.page-head h1, .case h1 { font-size: clamp(1.9rem, 4.5vw, 2.6rem); letter-spacing: -0.02em; margin: .4rem 0 .8rem; }
.case-head .lede { margin: 0; max-width: none; }
.card-top { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: .6rem; }
.tags { font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; color: var(--blue); font-weight: 600; }
.status {
  font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; white-space: nowrap;
  border: 2px solid; border-radius: 4px; padding: .1rem .5rem; font-weight: 800;
  transform: rotate(2deg);
}
.status-live { color: var(--stamp); border-color: var(--stamp); }
.status-shipped, .status-daily { color: var(--stamp-blue); border-color: var(--stamp-blue); }
.status .dot { display: none; }

.prose { margin-top: 1.7rem; }
.prose h2 { margin-top: 2.4rem; letter-spacing: -0.015em; border-bottom: 1px solid var(--faint); padding-bottom: .3rem; }
.prose img { max-width: 100%; border: 1.5px solid var(--edge); box-shadow: var(--shadow); }
.prose table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--faint); padding: .55rem .8rem; text-align: left; font-size: .95rem; }
.prose th { color: var(--blue); font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
.prose blockquote { border-left: 3px solid var(--blue); margin: 1.2rem 0; padding: .2rem 0 .2rem 1.1rem; color: var(--muted); }
.prose code { font-size: .9em; background: var(--sheet); border: 1px solid var(--faint); padding: .08em .35em; border-radius: 3px; }
.back { margin-top: 3rem; }
.pill {
  display: inline-block; border: 2px solid var(--blue); color: var(--blue);
  padding: .55rem 1.4rem; font-weight: 700; border-radius: 4px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: .8rem; letter-spacing: .12em; text-transform: uppercase;
}
.pill:hover { text-decoration: none; background: var(--blue); color: var(--paper); }

/* ---------- footer (title block) ---------- */
.site-footer {
  max-width: 1040px; margin: 3rem auto 0; padding: 1rem 1.5rem 2.2rem;
  border-top: 2px solid var(--edge);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem;
  color: var(--muted); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
}
.site-footer p { margin: 0; }

/* ---------- scroll reveal ---------- */
html.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
html.js .reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .sheet .desc { min-height: 0; }
  .brand-text .dwg { display: none; }
  .site-nav nav { gap: .9rem; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  body, .sheet, .stamp, .theme-toggle, .tblock .cell b { transition: none; }
  html.js .reveal { opacity: 1; transform: none; transition: none; }
}