/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, svg { max-width: 100%; display: block; }

body {
  background: var(--paper);
  color: var(--ink-body);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.7;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.2;
  margin: 0 0 var(--space-3);
}
h1 { font-size: var(--step-4); letter-spacing: -0.025em; }
h2 { font-size: var(--step-3); letter-spacing: -0.02em; }
h3 { font-size: var(--step-2); letter-spacing: -0.015em; }
h4 { font-size: var(--step-1); }
p { margin: 0 0 var(--space-3); }
a { color: var(--rule-condition); text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }
code, .mono { font-family: var(--font-mono); font-size: 0.9em; }

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

/* Layout */
.page { max-width: var(--page-width); margin: 0 auto; padding: 0 var(--space-4); }
.prose { max-width: var(--content-width); }

.site-header {
  border-bottom: 1px solid var(--hairline-strong);
  padding: var(--space-3) 0;
}
.site-header .page { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); }
.site-header .brand { font-family: var(--font-display); font-weight: 600; font-size: var(--step-2); color: var(--ink); text-decoration: none; }
.site-header .brand em { font-style: italic; color: var(--rule-eligibility); }
.site-header nav { font-family: var(--font-chrome); display: flex; gap: var(--space-4); font-size: 0.9rem; }
.site-header nav a { color: var(--ink-soft); text-decoration: none; }
.site-header nav a:hover { color: var(--ink); }

.site-footer {
  border-top: 1px solid var(--hairline);
  margin-top: var(--space-6);
  padding: var(--space-4) 0 var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

main { padding: var(--space-5) 0; }

.hairline { border: none; border-top: 1px solid var(--hairline); margin: var(--space-4) 0; }

/* Chips — the five-axis rule vocabulary */
.chip-row { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: var(--space-3) 0; }
.chip {
  font-family: var(--font-chrome);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  white-space: nowrap;
}
.chip--permission { color: var(--rule-permission); background: var(--rule-permission-bg); }
.chip--condition { color: var(--rule-condition); background: var(--rule-condition-bg); }
.chip--limitation { color: var(--rule-limitation); background: var(--rule-limitation-bg); }
.chip--eligibility { color: var(--rule-eligibility); background: var(--rule-eligibility-bg); }
.chip--change { color: var(--rule-change); background: var(--rule-change-bg); }

.axis-block { margin-bottom: var(--space-4); }
.axis-block h4 { font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); margin-bottom: var(--space-2); }

/* Non-standard warning — loud, on purpose */
.warning-banner {
  border: 1px solid var(--rule-limitation);
  background: var(--rule-limitation-bg);
  color: var(--rule-limitation);
  font-family: var(--font-chrome);
  padding: var(--space-3);
  border-radius: var(--radius);
  margin-bottom: var(--space-4);
}
.warning-banner strong { display: block; margin-bottom: 0.25em; }

/* Home */
.hero { padding: var(--space-5) 0 var(--space-4); }
.hero .kicker { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.68rem; color: var(--rule-eligibility); margin-bottom: var(--space-2); }
.hero p.lede { font-size: var(--step-1); color: var(--ink-body); max-width: var(--content-width); }

/* Landscape map — the hero component. Two axes: who may use it (x),
   when it opens up (y). Grid lines are guidance, not data. */
.landscape { display: grid; grid-template-columns: 1fr 19rem; grid-template-rows: auto auto; gap: var(--space-4); align-items: start; margin: var(--space-5) 0 var(--space-3); }
@media (max-width: 760px) {
  .landscape { grid-template-columns: 1fr; }
  .landscape-body, .landscape-xaxis, .landscape-readout { grid-column: 1; }
  .landscape-body { grid-row: 1; }
  .landscape-xaxis { grid-row: 2; }
  .landscape-readout { grid-row: 3; }
}

.landscape-body { grid-column: 1; grid-row: 1; display: flex; gap: var(--space-2); }
.landscape-yaxis {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--rule-change);
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.landscape-plot {
  position: relative;
  flex: 1;
  min-width: 0;
  aspect-ratio: 3 / 2;
  min-height: 300px;
  border: 1px solid var(--ink);
  background: var(--paper);
}
.landscape-bands { position: absolute; inset: 0; display: grid; grid-template-columns: 22% 30% 36% 12%; }
.landscape-bands .band { border-right: 1px solid var(--hairline); }
.landscape-bands .band:last-child { border-right: none; }
.band--open { background: var(--terrain-open); }
.band--delayed { background: var(--terrain-delayed); }
.band--restricted { background: var(--terrain-restricted); }
.band--proprietary { background: var(--terrain-proprietary); }

.landscape-rows { position: absolute; inset: 0; }
.landscape-rows .row-line { position: absolute; left: 0; right: 0; border-top: 1px dashed var(--terrain-row-soft); }
.landscape-rows .row-line--mid { border-top-color: var(--terrain-row); }

.landscape-band-labels {
  position: absolute; top: 0; left: 0; right: 0;
  display: grid; grid-template-columns: 22% 30% 36% 12%;
  font-family: var(--font-mono);
  font-size: 0.6rem; letter-spacing: 0.08em; text-transform: uppercase;
  pointer-events: none;
}
.landscape-band-labels span { padding: 0.5em 0.6em; }
.landscape-band-labels .l-open { color: var(--rule-permission); }
.landscape-band-labels .l-delayed { color: var(--rule-change); }
.landscape-band-labels .l-restricted { color: var(--rule-eligibility); }
.landscape-band-labels .l-proprietary { color: var(--ink-soft); }

.landscape-row-labels { position: absolute; inset: 0; pointer-events: none; }
.landscape-row-labels span {
  position: absolute; left: 0.5em; transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 0.6rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--terrain-label);
}

.landscape-dot { position: absolute; display: flex; align-items: center; gap: 0.4em; cursor: default; text-decoration: none; color: inherit; }
.landscape-dot .pip { width: 8px; height: 8px; background: var(--rule-eligibility); flex: none; border-radius: 50%; }
.landscape-dot .pip--osi { background: var(--rule-permission); }
.landscape-dot .pip--delayed { background: var(--rule-change); }
.landscape-dot .label { font-family: var(--font-chrome); font-size: 0.75rem; font-weight: 500; white-space: nowrap; }
.landscape-dot:hover .label, .landscape-dot:focus .label { text-decoration: underline; }

.landscape-xaxis {
  grid-column: 1; grid-row: 2;
  display: flex; justify-content: space-between; align-items: baseline;
  padding-top: 0.5em; margin-left: calc(0.7rem + var(--space-2));
  font-family: var(--font-mono);
  font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--rule-eligibility);
}

.landscape-readout { grid-column: 2; grid-row: 1 / span 2; border-top: 2px solid var(--ink); padding-top: var(--space-3); }
.landscape-readout .kicker { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: var(--space-2); }
.landscape-readout h3 { font-size: 1.3rem; margin-bottom: 0.2em; }
.landscape-readout .spdx { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-soft); margin-bottom: var(--space-2); }
.landscape-readout p { font-size: 0.95rem; margin-bottom: var(--space-2); }
.landscape-caption { border-top: 1px solid var(--hairline); padding-top: var(--space-2); margin-top: var(--space-2); font-size: 0.85rem; color: var(--ink-soft); max-width: 44rem; }

/* pick-row — ruled rows replace the banned card pattern. 3rem numeral / body / right-aligned CTA. */
.pick-row-list { border-top: 1px solid var(--hairline); margin: var(--space-4) 0; }
.pick-row {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) minmax(0, 15rem);
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--hairline);
}
.pick-row .num { font-family: var(--font-display); font-size: 1.75rem; color: var(--hairline-strong); line-height: 1; }
.pick-row .body h3 { margin-bottom: 0.2em; font-size: var(--step-1); }
.pick-row .body p { margin: 0; color: var(--ink-body); font-size: 0.95rem; }
.pick-row .meta { display: flex; flex-direction: column; align-items: flex-end; gap: 0.4em; text-align: right; }
@media (max-width: 640px) {
  .pick-row { grid-template-columns: 2.5rem 1fr; }
  .pick-row .meta { grid-column: 1 / -1; align-items: flex-start; text-align: left; }
}

.handoff-row {
  border-top: 1px solid var(--hairline);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  font-family: var(--font-chrome);
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Appendix table */
table.appendix { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
table.appendix th, table.appendix td { text-align: left; padding: var(--space-2) var(--space-2); border-bottom: 1px solid var(--hairline); vertical-align: top; }
table.appendix th { font-family: var(--font-chrome); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--ink-soft); border-bottom: 1px solid var(--hairline-strong); }
table.appendix tr:hover td { background: var(--paper-raised); }
table.appendix .name-cell a { font-weight: 600; text-decoration: none; color: var(--ink); }
table.appendix .name-cell a:hover { color: var(--rule-condition); }

.facets { display: flex; gap: var(--space-3); flex-wrap: wrap; margin: var(--space-3) 0; font-family: var(--font-chrome); font-size: 0.9rem; }
.facets label { display: flex; align-items: center; gap: 0.4em; border: 1px solid var(--hairline-strong); border-radius: var(--radius); padding: 0.3em 0.7em; cursor: pointer; background: var(--paper); }
.facets input { accent-color: var(--rule-eligibility); }

/* Detail page: two-column, text left / spec-sheet rail right */
.detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) 24rem; gap: var(--space-5); align-items: start; }
@media (max-width: 900px) { .detail-grid { grid-template-columns: 1fr; } }

.license-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  white-space: pre-wrap;
  background: var(--paper-raised);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: var(--space-4);
  line-height: 1.65;
}

/* Specimen treatment: this is a diagram of the instrument, not a copy-paste source */
.license-text--specimen { font-size: 0.8rem; color: var(--ink-soft); user-select: none; }
.license-text--specimen .slot {
  font-family: var(--font-chrome);
  font-size: 0.75em;
  font-weight: 500;
  color: var(--rule-eligibility);
  background: var(--rule-eligibility-bg);
  padding: 0.05em 0.4em;
  border-radius: var(--radius);
  user-select: none;
}

.rail {
  position: sticky;
  top: var(--space-4);
  max-height: calc(100vh - var(--space-4) * 2);
  overflow-y: auto;
  border-left: 1px solid var(--hairline-strong);
  padding-left: var(--space-4);
}
.rail .identity-badges { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-3); font-family: var(--font-chrome); font-size: 0.75rem; }
.badge { border: 1px solid var(--hairline-strong); border-radius: var(--radius); padding: 0.15em 0.5em; color: var(--ink-soft); }
.badge--yes { color: var(--rule-permission); border-color: var(--rule-permission); }

.rail .blank { display: block; margin-bottom: var(--space-3); }
.rail .blank .label { font-family: var(--font-chrome); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--ink-soft); display: block; margin-bottom: 0.2em; }
.rail .blank .filled { font-family: var(--font-mono); font-size: 0.9rem; }
.rail .blank .unset { font-family: var(--font-mono); font-size: 0.9rem; color: var(--rule-eligibility); background: var(--rule-eligibility-bg); padding: 0.1em 0.4em; border-radius: var(--radius); }

/* Forms — wizard + generator */
form.stack { display: flex; flex-direction: column; gap: var(--space-4); max-width: var(--content-width); }
.field label { font-family: var(--font-chrome); font-weight: 500; display: block; margin-bottom: 0.3em; }
.field .hint { font-family: var(--font-chrome); font-size: 0.8rem; color: var(--ink-soft); margin-top: 0.3em; }
.field input[type="text"], .field textarea {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  padding: 0.6em 0.7em;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
}
.field textarea { min-height: 4.5em; resize: vertical; }
.field input:focus, .field textarea:focus { outline: 2px solid var(--rule-change); outline-offset: 1px; }

/* solid / outline / ghost — three, total. Colour on a button only ever means an
   axis the surrounding row is about (e.g. a pick-row CTA on the eligibility door);
   the default hover is a plain ink<->paper inversion, never an axis colour. */
button, .btn {
  font-family: var(--font-chrome);
  font-weight: 500;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 0.6em 1.2em;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.95rem;
  text-decoration: none;
  display: inline-block;
}
button:hover, .btn:hover { background: var(--paper); color: var(--ink); }
.btn--outline { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn--outline:hover { background: var(--ink); color: var(--paper); }
.btn--ghost { background: transparent; color: var(--ink-soft); border-color: transparent; }
.btn--ghost:hover { background: transparent; color: var(--ink); }

/* Wizard progress + options */
.wizard-progress { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: var(--space-3); }
.wizard-progress .track { height: 4px; background: var(--hairline); border-radius: 2px; margin-top: 0.4em; overflow: hidden; }
.wizard-progress .fill { height: 100%; background: var(--rule-eligibility); }

.wizard-options { display: flex; gap: var(--space-3); margin-top: var(--space-3); }
.wizard-options a.btn { min-width: 6rem; text-align: center; }

/* section-head — the recurring rule: ink hairline, mono eyebrow, serif heading.
   Used to open a page (wizard, login, signup, generator, inspect) with the same
   rhythm the homepage sections already have. */
.section-head { margin-top: 4.5rem; border-top: 1px solid var(--ink); padding-top: 0.75rem; }
.section-head .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: var(--space-2);
}
.section-head .wizard-progress { margin-bottom: var(--space-2); }
.section-head h1, .section-head h2 { margin-bottom: var(--space-2); }

/* Utilities — small, reusable, instead of one-off inline styles. */
.note { font-family: var(--font-chrome); font-size: 0.9rem; color: var(--ink-soft); }
.text-soft { color: var(--ink-soft); }
.subhead { display: block; font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); margin-bottom: var(--space-2); }
.form-narrow { max-width: 24rem; }
.form-medium { max-width: 36rem; }
.rail--plain { border-left: none; padding-left: 0; }
.inline-form { display: inline; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mt-2 { margin-top: var(--space-2); }
.footnote {
  border-top: 1px solid var(--hairline);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  font-family: var(--font-chrome);
  font-size: 0.85rem;
  color: var(--ink-soft);
}