/* ================================================================
   ARCHITECT — token system
   Palette: cool drafting-blue paper, ink-navy line work, an accent
   that shifts cool -> hot as the curriculum moves easy -> hard.
   Type: Newsreader (display/editorial), Karla (body), IBM Plex Mono
   (blueprint annotation / utility).
   ================================================================ */

:root {
  --paper: #e7ebe8;
  --paper-raised: #f4f6f4;
  --paper-sunk: #dde2df;
  --ink: #1a222b;
  --ink-soft: #4b5661;
  --ink-faint: #7c8790;
  --line: #c3ccc7;
  --line-strong: #9aa6a0;

  --accent-cool: #3e6e93;
  --accent-mid: #7a7433;
  --accent-hot: #c97a25;
  --accent: var(--accent-cool);

  --ok: #3f7d5c;

  --font-display: "Newsreader", ui-serif, Georgia, "Times New Roman", serif;
  --font-body: "Karla", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --sheet-max: 46rem;
  --wide-max: 72rem;

  color-scheme: light;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14181b;
    --paper-raised: #1b2124;
    --paper-sunk: #0e1113;
    --ink: #e7ebe8;
    --ink-soft: #a9b3ac;
    --ink-faint: #78827c;
    --line: #2b3336;
    --line-strong: #3d4749;

    --accent-cool: #6fa0c4;
    --accent-mid: #b7a24f;
    --accent-hot: #e6994a;
    --accent: var(--accent-cool);

    --ok: #6bb98f;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #14181b;
  --paper-raised: #1b2124;
  --paper-sunk: #0e1113;
  --ink: #e7ebe8;
  --ink-soft: #a9b3ac;
  --ink-faint: #78827c;
  --line: #2b3336;
  --line-strong: #3d4749;

  --accent-cool: #6fa0c4;
  --accent-mid: #b7a24f;
  --accent-hot: #e6994a;
  --accent: var(--accent-cool);

  --ok: #6bb98f;
  color-scheme: dark;
}

/* ---------------------------- reset ---------------------------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  padding-inline: clamp(16px, 4vw, 48px);
}
img { max-width: 100%; }
[hidden] { display: none !important; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; text-wrap: balance; margin: 0; }
p { margin: 0 0 1em; }
a { color: inherit; }
button { font-family: inherit; }
::selection { background: var(--accent-hot); color: #fff; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

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

.mono { font-family: var(--font-mono); }

/* ------------------------- top bar ------------------------- */
.topbar {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.wordmark {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.wordmark .dot { color: var(--accent-hot); }
.topnav {
  display: flex;
  gap: clamp(10px, 2vw, 22px);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.topnav a { text-decoration: none; color: var(--ink-soft); border-bottom: 1px solid transparent; padding-bottom: 2px; }
.topnav a:hover { color: var(--ink); border-color: var(--line-strong); }
.theme-toggle {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 9px;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--ink); }

@media (max-width: 640px) {
  .topbar {
    flex-wrap: wrap;
    row-gap: 10px;
    padding: 12px 0;
  }
  .topnav {
    order: 3;
    flex-basis: 100%;
    overflow-x: auto;
    justify-content: flex-start;
    gap: 18px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 2px;
  }
  .topnav::-webkit-scrollbar { display: none; }
  .topnav a { flex: none; padding-block: 4px; }
}

/* ------------------------- sheet layout ------------------------- */
.sheet {
  max-width: var(--sheet-max);
  margin: 0 auto;
  padding-block: clamp(48px, 8vw, 88px);
  border-bottom: 1px dashed var(--line);
  position: relative;
}
.sheet--wide { max-width: var(--wide-max); }
.sheet:last-of-type { border-bottom: none; }

.sheet-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.sheet-label::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
}

/* ------------------------- hero ------------------------- */
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.1rem);
  line-height: 1.03;
  letter-spacing: -0.01em;
  max-width: 14ch;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent-hot);
}
.hero .lede {
  max-width: 56ch;
  font-size: 1.1rem;
  color: var(--ink-soft);
  margin-top: 22px;
}
.hero .manifesto {
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 14px;
  max-width: 60ch;
}
.hero .manifesto p { margin: 0; font-size: 0.98rem; }
.hero .manifesto strong { color: var(--ink); }
.hero-cta {
  margin-top: 34px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}
.btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 20px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn:hover { background: var(--accent-hot); border-color: var(--accent-hot); color: #14181b; }
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn--ghost:hover { background: transparent; color: var(--ink); border-color: var(--ink); }
.hero-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
}

/* ------------------------- pillars ------------------------- */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 28px;
}
.pillar-card {
  background: var(--paper);
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pillar-card .dwg {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-faint);
}
.pillar-card h3 { font-size: 1.25rem; }
.pillar-card p { font-size: 0.9rem; color: var(--ink-soft); margin: 0; }
.pillar-card--learn { border-top: 3px solid var(--accent-cool); }
.pillar-card--think { border-top: 3px solid color-mix(in srgb, var(--accent-cool) 40%, var(--accent-mid) 60%); }
.pillar-card--write { border-top: 3px solid color-mix(in srgb, var(--accent-mid) 40%, var(--accent-hot) 60%); }
.pillar-card--speak { border-top: 3px solid var(--accent-hot); }

@media (max-width: 720px) {
  .pillars-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .pillars-grid { grid-template-columns: 1fr; }
}

/* ------------------------- blueprint diagram ------------------------- */
.blueprint-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.scale-legend {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.scale-bar {
  width: 160px;
  height: 6px;
  background: linear-gradient(90deg, var(--accent-cool), var(--accent-mid), var(--accent-hot));
}

.blueprint-wrap {
  border: 1px solid var(--line);
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 42px,
    var(--paper-raised);
  padding: 8px;
  overflow-x: auto;
}
.blueprint-svg { display: block; min-width: 760px; width: 100%; height: auto; }

/* stage list: the primary mobile view — the wide SVG diagram becomes an
   unusable pinch-and-scroll exercise below ~680px, so phones get a
   vertical, thumb-scrollable list of the same 13 sheets instead. */
.stage-list { display: none; }
.stage-tier-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 22px 4px 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.stage-tier-head:first-child { padding-top: 4px; }
.stage-tier-head strong { color: var(--accent); }
.stage-row {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  min-height: 56px;
  padding: 10px 4px;
  border: none;
  border-bottom: 1px solid var(--line);
  background: none;
  color: inherit;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
}
.stage-row:last-child { border-bottom: none; }
.stage-row .num {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--paper);
  background: var(--accent-cool);
}
.stage-row.tier-practice .num { background: var(--accent-mid); }
.stage-row.tier-mastery .num { background: var(--accent-hot); }
.stage-row.tier-capstone .num { background: var(--ink); }
.stage-row.is-done .num { background: var(--ok); }
.stage-row .meta { flex: 1; min-width: 0; display: grid; gap: 2px; }
.stage-row .meta .track {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.stage-row .meta .title {
  display: block;
  font-size: 0.98rem;
}
.stage-row .chev { flex: none; color: var(--ink-faint); font-size: 1.1rem; }
.stage-row:active { background: var(--paper-sunk); }

@media (max-width: 680px) {
  .blueprint-wrap { display: none; }
  .stage-list { display: block; }
}

.track-line { fill: none; stroke-width: 1.6; opacity: 0.85; }
.track-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  fill: var(--ink-soft);
}
.tier-divider { stroke: var(--line-strong); stroke-dasharray: 2 4; stroke-width: 1; }
.tier-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  fill: var(--ink-faint);
}
.crosslink { stroke: var(--ink-faint); stroke-width: 1; stroke-dasharray: 1 3; opacity: 0.6; fill: none; }

.node {
  cursor: pointer;
}
.node circle.node-hit { fill: transparent; }
.node circle.node-dot {
  stroke: var(--paper-raised);
  stroke-width: 2;
  transition: r 0.12s ease;
}
.node:hover circle.node-dot,
.node:focus-visible circle.node-dot { r: 9; }
.node.is-done circle.node-dot { fill: var(--ok) !important; }
.node text.node-num {
  font-family: var(--font-mono);
  font-size: 9.5px;
  fill: var(--paper);
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
}
.node-caption {
  font-family: var(--font-body);
  font-size: 11px;
  fill: var(--ink);
  pointer-events: none;
}
.capstone-ring {
  fill: none;
  stroke: var(--accent-hot);
  stroke-width: 1.4;
  stroke-dasharray: 3 3;
}
.node--foundation circle.node-dot { fill: var(--accent-cool); }
.node--practice circle.node-dot { fill: var(--accent-mid); }
.node--mastery circle.node-dot { fill: var(--accent-hot); }
.node--capstone circle.node-dot { fill: var(--ink); }

/* ------------------------- drawer ------------------------- */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--ink) 45%, transparent);
  z-index: 60;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}
.drawer-backdrop.is-open { opacity: 1; pointer-events: auto; }

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: min(480px, 92vw);
  background: var(--paper-raised);
  border-left: 1px solid var(--line-strong);
  z-index: 61;
  transform: translateX(100%);
  transition: transform 0.22s ease;
  overflow-y: auto;
  padding: env(safe-area-inset-top, 0px) 0 env(safe-area-inset-bottom, 0px);
}
.drawer.is-open { transform: translateX(0); }
.drawer-inner { padding: 26px 28px 100px; }
.drawer-close {
  position: absolute;
  top: 18px;
  right: 20px;
  background: none;
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  width: 30px;
  height: 30px;
  cursor: pointer;
  font-family: var(--font-mono);
}
.drawer-close:hover { color: var(--ink); border-color: var(--ink); }

.drawer-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.drawer h2 { font-size: 1.7rem; margin-bottom: 14px; max-width: 18ch; }
.drawer .principle { font-size: 1rem; color: var(--ink-soft); margin-bottom: 24px; }
.drawer h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 10px;
}
.drawer ol.steps { margin: 0 0 26px; padding-left: 1.2em; display: grid; gap: 10px; }
.drawer ol.steps li { padding-left: 4px; }
.drill-box {
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--accent-hot);
  padding: 16px 18px;
  margin-bottom: 22px;
  background: var(--paper);
}
.drill-box p { margin: 0; }
.drawer .source {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  margin-bottom: 24px;
}
.mark-done {
  width: 100%;
  padding: 13px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--ok);
  background: transparent;
  color: var(--ok);
  cursor: pointer;
}
.mark-done:hover { background: var(--ok); color: var(--paper-raised); }
.mark-done.is-done { background: var(--ok); color: var(--paper-raised); }

/* ------------------------- daily rep ------------------------- */
.rep-card {
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
  padding: clamp(24px, 4vw, 40px);
  margin-top: 24px;
  display: grid;
  gap: 20px;
}
.rep-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}
.rep-track {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.rep-timer {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}
.rep-title { font-size: 1.4rem; }
.rep-text { color: var(--ink-soft); }
.rep-controls { display: flex; gap: 12px; flex-wrap: wrap; }

/* ------------------------- field notes ------------------------- */
.glossary {
  margin-top: 20px;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.glossary dt {
  font-family: var(--font-mono);
  font-weight: 600;
  padding-top: 18px;
}
.glossary dd {
  margin: 4px 0 18px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
}
.glossary dd:last-child { border-bottom: none; }

/* ------------------------- title block (fixed HUD) ------------------------- */
.titleblock {
  position: fixed;
  left: clamp(10px, 3vw, 24px);
  bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  z-index: 50;
  border: 1px solid var(--line-strong);
  background: color-mix(in srgb, var(--paper-raised) 92%, transparent);
  backdrop-filter: blur(4px);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  min-width: 208px;
  box-shadow: 0 2px 14px color-mix(in srgb, var(--ink) 12%, transparent);
}
.titleblock-row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 7px 12px;
  border-bottom: 1px solid var(--line);
  text-transform: uppercase;
  color: var(--ink-soft);
}
.titleblock-row:last-child { border-bottom: none; }
.titleblock-row strong { color: var(--ink); font-weight: 600; }
.titleblock-bar {
  height: 4px;
  background: var(--line);
  margin: 0 12px 8px;
  position: relative;
}
.titleblock-bar span {
  position: absolute;
  inset: 0;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-cool), var(--accent-hot));
  transition: width 0.3s ease;
}

@media (max-width: 640px) {
  .titleblock {
    left: 0;
    right: 0;
    bottom: 0;
    min-width: 0;
    border-left: none;
    border-right: none;
    border-bottom: none;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px clamp(16px, 4vw, 48px);
    padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px));
  }
  .titleblock-row {
    border-bottom: none;
    padding: 0;
    flex: none;
    gap: 6px;
  }
  .titleblock-row:first-child { display: none; } /* "Project" row: redundant with the topbar wordmark on phones */
  .titleblock-bar {
    flex: 1;
    margin: 0;
  }
  .titleblock-row:last-child {
    order: 3;
  }
  body {
    padding-bottom: calc(52px + env(safe-area-inset-bottom, 0px));
  }
}

/* ------------------------- footer ------------------------- */
.site-footer {
  max-width: var(--sheet-max);
  margin: 0 auto;
  padding: 34px 0 80px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}