/* ==========================================================================
   Quadra — quadraclimate.com
   Design system: "instrument record"
   Display: Archivo (stamped-plate headings) · Body/labels: Inter
   ========================================================================== */

:root {
  /* Ground */
  --paper:      #EFEDE1;   /* bone */
  --card:       #F7F5EC;
  --deep:       #1D3A2D;   /* forest — dark sections and nav */
  --deep-2:     #244737;
  --deep-3:     #2E5543;

  /* Ink */
  --ink:        #1A2420;
  --ink-2:      #384A41;
  --muted:      #6E7A72;
  --muted-dk:   #9CB1A6;   /* muted on dark */

  /* Rules */
  --rule:       #D6D3C2;
  --rule-soft:  #E3E0D1;
  --rule-dk:    #3A5A48;

  /* Signal — single accent */
  --signal:     #C4664A;   /* terracotta */
  --signal-lt:  #DB8A6E;
  --caution:    #8A6A3C;

  /* Type — all sans, matching the source site */
  --f-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --f-body:    "Inter", "Helvetica Neue", Arial, sans-serif;
  --f-label:   "Inter", "Helvetica Neue", Arial, sans-serif;
  --f-mono:    var(--f-label);   /* label/figure role; kept as an alias */

  /* Metrics */
  --gutter:    72px;        /* left spine gutter, desktop */
  --measure:   64ch;
  --wrap:      1180px;
  --step:      clamp(56px, 7vw, 104px);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
[id] { scroll-margin-top: 92px; } /* keep anchor targets clear of the sticky header */
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: clamp(17px, 1.05vw + 13px, 19px);
  line-height: 1.62;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; }

/* ---------- Type roles ---------- */
h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 600;
  letter-spacing: -0.022em;
  line-height: 1.06;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(2.9rem, 7.2vw, 5.4rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.95rem, 3.5vw, 3.05rem); letter-spacing: -0.028em; }
h3 { font-size: clamp(1.28rem, 1.7vw, 1.7rem); }
h4 { font-size: 1.05rem; letter-spacing: -0.012em; }

p { margin: 0 0 1.05em; max-width: var(--measure); }
p:last-child { margin-bottom: 0; }

/* Mono utility — the vernacular of the instrument log */
.eyebrow, .tag, .kicker, .meta, .lede-note, .num, th, .stat-label, .field-k {
  font-family: var(--f-label);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 600;
}
.eyebrow {
  display: block;
  color: var(--signal);
  margin-bottom: 1.6rem;
}
.eyebrow .idx { color: var(--muted); }
.kicker {
  display: block;
  color: var(--muted);
  margin-bottom: 0.9rem;
  letter-spacing: 0.14em;
}
.lede {
  font-size: clamp(1.1rem, 1.35vw, 1.32rem);
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 56ch;
}
.small { font-size: 0.94rem; color: var(--muted); line-height: 1.55; }
strong { font-weight: 600; }

/* ---------- Layout ---------- */
.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}
.section { padding-block: var(--step); position: relative; }
.section + .section { border-top: 1px solid var(--rule); }
.section--dark {
  background: var(--deep);
  color: #E6ECEE;
  border-top: none !important;
}
.section--dark h1, .section--dark h2, .section--dark h3 { color: #F2F6F7; }
.section--dark .eyebrow { color: var(--signal-lt); }
.section--dark .kicker, .section--dark .small, .section--dark .muted { color: var(--muted-dk); }
.section--dark .lede { color: #C8D5D9; }
.section--dark { --rule: var(--rule-dk); --rule-soft: var(--rule-dk); --card: var(--deep-2); }

.head { max-width: 44ch; }
.head .lede { margin-top: 1.1rem; }
.body-copy { margin-top: 2.2rem; }

.grid { display: grid; gap: clamp(20px, 2.4vw, 34px); }
.g-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.g-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.g-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
@media (max-width: 900px) { .g-3, .g-4 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 620px) { .g-2, .g-3, .g-4 { grid-template-columns: 1fr; } }

/* ==========================================================================
   SIGNATURE — the wellbore spine
   A hairline in the left gutter reads as an open annulus (dashed, venting)
   until the page passes the Plug section, where it becomes a cemented column.
   ========================================================================== */
.spine {
  position: fixed;
  left: 26px; top: 0; bottom: 0;
  width: 10px;
  z-index: 40;
  pointer-events: none;
}
.spine__casing {
  position: absolute; inset: 0;
  border-left: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
}
.spine__fill {
  position: absolute; left: 1px; right: 1px; top: 0;
  height: 0;
  background:
    repeating-linear-gradient(180deg,
      var(--signal) 0 2px, transparent 2px 9px);
  opacity: 0.5;
  transition: height 0.12s linear;
}
.spine.is-cemented .spine__fill {
  background: var(--signal);
  opacity: 0.85;
}
.spine__tool {
  position: absolute; left: -3px;
  width: 14px; height: 14px;
  margin-top: -7px;
  border: 1px solid var(--signal);
  background: var(--paper);
  border-radius: 50%;
  transition: top 0.12s linear;
}
.spine__tool::after {
  content: ""; position: absolute; inset: 3px;
  background: var(--signal); border-radius: 50%;
}
@media (prefers-reduced-motion: reduce) {
  .spine__fill, .spine__tool { transition: none; }
}
@media (max-width: 1120px) { .spine { display: none; } }

/* ---------- Header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.site-head__in {
  display: flex; align-items: center; gap: 24px;
  min-height: 72px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { height: 52px; width: auto; }
.nav { margin-left: auto; display: flex; gap: 4px; align-self: stretch; }
.nav__item { position: relative; display: flex; align-items: stretch; }
.nav__link {
  display: flex; align-items: center; gap: 6px; white-space: nowrap;
  font-family: var(--f-mono);
  font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  text-decoration: none; color: var(--ink-2);
  padding: 8px 10px; border-radius: 2px;
}
.nav__link:hover, .nav__link:focus-visible { color: var(--signal); background: var(--card); }
.nav__link[aria-current] { color: var(--signal); box-shadow: inset 0 -2px 0 var(--signal); }
.nav__chev { color: var(--signal); font-size: 0.6rem; transition: transform 0.15s ease; }
.nav__item:hover .nav__chev,
.nav__item:focus-within .nav__chev { transform: rotate(180deg); }

/* Dropdown panel — dark, like the source site */
.nav__menu {
  display: none;
  position: absolute; left: 0; top: 100%; z-index: 70;
  min-width: 300px;
  background: var(--deep);
  border-top: 3px solid var(--signal);
  padding: 18px 22px 8px;
  box-shadow: 0 22px 44px rgba(26, 36, 32, 0.28);
}
.nav__item:hover .nav__menu,
.nav__item:focus-within .nav__menu { display: block; }
.nav__item:nth-last-child(-n+3) .nav__menu { left: auto; right: 0; }
.nav__menu-k {
  display: block;
  font-family: var(--f-mono); font-size: 0.62rem; font-weight: 600;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--muted-dk);
  padding-bottom: 12px; border-bottom: 1px solid var(--rule-dk);
}
.nav__menu a {
  display: flex; justify-content: space-between; align-items: baseline; gap: 28px;
  padding: 13px 0;
  font-family: var(--f-body); font-size: 0.97rem; text-decoration: none;
  color: #E9EFEA; white-space: nowrap;
  border-bottom: 1px solid var(--rule-dk);
}
.nav__menu a:last-child { border-bottom: 0; }
.nav__menu .nav__arw { color: var(--signal-lt); transition: transform 0.15s ease; }
.nav__menu a:hover { color: #FFF; }
.nav__menu a:hover .nav__arw { transform: translateX(3px); }
.nav__menu a:focus-visible { outline: 2px solid var(--signal-lt); outline-offset: 2px; }

.nav-toggle {
  margin-left: auto; display: none;
  font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; background: none; border: 1px solid var(--rule);
  padding: 9px 13px; border-radius: 2px; color: var(--ink); cursor: pointer;
}
@media (max-width: 1200px) {
  .nav {
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--rule);
    padding: 8px clamp(20px, 4vw, 40px) 18px;
    max-height: calc(100vh - 72px); overflow-y: auto;
  }
  .nav[hidden] { display: none; }
  .nav__item { display: block; }
  .nav__link { padding: 12px 0; border-bottom: 1px solid var(--rule-soft); }
  .nav__chev { display: none; }
  .nav__menu {
    display: block; position: static;
    min-width: 0; background: none; border-top: 0; box-shadow: none;
    padding: 0 0 6px 16px;
  }
  .nav__menu-k { display: none; }
  .nav__menu a {
    color: var(--ink-2); font-size: 0.92rem; padding: 10px 0;
    border-bottom: 1px solid var(--rule-soft); white-space: normal;
  }
  .nav__menu a:last-child { border-bottom: 1px solid var(--rule-soft); }
  .nav__menu .nav__arw { color: var(--signal); }
  .nav-toggle { display: block; }
}

/* ---------- Hero ---------- */
.hero {
  background: var(--deep);
  color: #EAF0F1;
  padding-block: clamp(48px, 6vw, 88px) 0;
  position: relative; overflow: hidden;
}
.hero__grid {
  display: grid; gap: clamp(36px, 5vw, 64px);
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  align-items: center;
}
@media (max-width: 900px) { .hero__grid { grid-template-columns: 1fr; } }
.hero h1 { color: #FBFDFD; }
.hero .eyebrow { color: var(--signal-lt); }
.hero__lede {
  font-size: clamp(1.14rem, 1.5vw, 1.42rem);
  line-height: 1.46; color: #C4D3D7;
  max-width: 34ch; margin: 1.5rem 0 2.2rem;
}
.hero__figure { position: relative; align-self: stretch; min-height: 300px; }
.hero__figure img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(0.35) contrast(1.04);
  border: 1px solid var(--rule-dk);
}
.hero__cap {
  font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--muted-dk); margin-top: 10px;
}
.hero__creed {
  display: flex; flex-wrap: wrap; gap: 0;
  margin-top: clamp(48px, 6vw, 76px);
  border-top: 1px solid var(--rule-dk);
}
.hero__creed span {
  font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: #B9CBD0;
  padding: 18px 26px 18px 0; margin-right: 26px;
  border-right: 1px solid var(--rule-dk);
}
.hero__creed span:last-child { border-right: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--f-mono); font-size: 0.72rem;
  letter-spacing: 0.15em; text-transform: uppercase;
  text-decoration: none; padding: 15px 22px;
  border: 1px solid currentColor; border-radius: 2px;
  transition: background 0.18s ease, color 0.18s ease;
}
.btn--solid { background: var(--signal); border-color: var(--signal); color: #FFF6F0; }
.btn--solid:hover { background: #A9502F; border-color: #A9502F; }
.btn--ghost { color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.section--dark .btn--ghost, .hero .btn--ghost { color: #DCE7EA; }
.section--dark .btn--ghost:hover, .hero .btn--ghost:hover { background: #DCE7EA; color: var(--deep); }
.btn__arw { transition: transform 0.18s ease; }
.btn:hover .btn__arw { transform: translateX(3px); }

/* ---------- Stat row ---------- */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); border-top: 1px solid var(--ink); }
@media (max-width: 780px) { .stats { grid-template-columns: repeat(2, minmax(0,1fr)); } }
.stat { padding: 22px 22px 24px 0; border-right: 1px solid var(--rule); }
.stat:last-child { border-right: none; }
.stat__n {
  font-family: var(--f-display); font-weight: 600;
  font-size: clamp(2.1rem, 3.6vw, 3.1rem);
  letter-spacing: -0.03em; line-height: 1; font-variant-numeric: tabular-nums;
}
.stat__t { margin-top: 12px; font-size: 0.95rem; line-height: 1.42; color: var(--ink-2); max-width: 24ch; }

/* ---------- Cards & panels ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--rule-soft);
  padding: clamp(20px, 2.1vw, 28px);
  border-radius: 2px;
}
.card .num, .panel .num { color: var(--signal); display: block; margin-bottom: 14px; }
.card h3, .card h4 { margin-bottom: 10px; }
.card p { font-size: 0.98rem; }

.rule-card {
  border-top: 1px solid var(--ink);
  padding-top: 18px;
}
.rule-card .num { color: var(--signal); display: block; margin-bottom: 12px; }
.rule-card h3 { font-size: 1.14rem; margin-bottom: 10px; }
.rule-card p { font-size: 0.97rem; color: var(--ink-2); }

.note {
  border-left: 2px solid var(--signal);
  padding: 4px 0 4px 20px;
  max-width: 62ch;
}
.note--caution { border-left-color: var(--caution); }
.note .kicker { color: var(--signal); }
.note--caution .kicker { color: var(--caution); }

.principle {
  display: grid; grid-template-columns: 210px minmax(0,1fr);
  gap: clamp(16px, 2vw, 32px);
  border-top: 1px solid var(--ink); border-bottom: 1px solid var(--rule);
  padding-block: 22px;
}
@media (max-width: 720px) { .principle { grid-template-columns: 1fr; } }

/* ---------- Ordered list, disciplined ---------- */
.ol-rules { list-style: none; padding: 0; margin: 0; counter-reset: r; }
.ol-rules li {
  counter-increment: r;
  display: grid; grid-template-columns: 54px minmax(0,1fr);
  gap: 14px; align-items: baseline;
  padding-block: 18px;
  border-bottom: 1px solid var(--rule);
}
.ol-rules li:first-child { border-top: 1px solid var(--ink); }
.ol-rules li::before {
  content: "0" counter(r);
  font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.14em;
  color: var(--signal);
}
.ol-rules p { margin: 0; font-size: 1rem; }
.ol-rules strong { font-family: var(--f-display); font-weight: 600; letter-spacing: -0.01em; }

/* ---------- Chain (evidence to asset / claims maturity) ---------- */
.chain { display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.chain--8 { grid-template-columns: repeat(8, minmax(0,1fr)); }
.chain--6 { grid-template-columns: repeat(6, minmax(0,1fr)); }
@media (max-width: 1000px) { .chain--8 { grid-template-columns: repeat(4, minmax(0,1fr)); } }
@media (max-width: 900px)  { .chain--6 { grid-template-columns: repeat(3, minmax(0,1fr)); } }
@media (max-width: 560px)  { .chain--8, .chain--6 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
.chain__cell { background: var(--card); padding: 16px 14px 18px; }
.chain__n { font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.14em; color: var(--signal); }
.chain__t { font-family: var(--f-display); font-weight: 600; font-size: 1rem; margin-top: 10px; letter-spacing: -0.012em; }
.chain__s { font-size: 0.86rem; color: var(--muted); line-height: 1.4; margin-top: 5px; }

/* ---------- Stepper (process & entities) ---------- */
.stepper { margin-top: 2.4rem; }
.stepper__tabs {
  display: grid; gap: 1px; background: var(--rule);
  border: 1px solid var(--rule); border-radius: 2px; overflow: hidden;
}
.stepper__tabs--5 { grid-template-columns: repeat(5, minmax(0,1fr)); }
.stepper__tabs--4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
@media (max-width: 760px) {
  .stepper__tabs--5, .stepper__tabs--4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
.tab {
  appearance: none; border: 0; cursor: pointer; text-align: left;
  background: var(--card); color: var(--ink-2);
  padding: 16px 16px 18px; font-family: inherit;
  transition: background 0.16s ease, color 0.16s ease;
}
.tab:hover { background: #FFF; }
.section--dark .tab:hover { background: var(--deep-3); }
.tab__n { display: block; font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.14em; color: var(--muted); }
.tab__t { display: block; font-family: var(--f-display); font-weight: 600; font-size: 1.06rem; margin-top: 9px; letter-spacing: -0.015em; }
.tab__s { display: block; font-family: var(--f-mono); font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-top: 7px; }
.section--dark .tab { color: #E6ECEE; }
.section--dark .tab .tab__n,
.section--dark .tab .tab__s { color: var(--muted-dk); }
.tab[aria-selected="true"] { background: var(--signal); color: #FFF6F0; }
.tab[aria-selected="true"] .tab__n,
.tab[aria-selected="true"] .tab__s { color: #F0CFC0; }
.tab:focus-visible { outline: 2px solid var(--signal); outline-offset: -2px; }

.panel {
  border: 1px solid var(--rule); border-top: 0;
  padding: clamp(24px, 3vw, 40px);
  background: var(--card);
}
.panel[hidden] { display: none; }
.panel__grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: clamp(24px, 3vw, 48px); }
@media (max-width: 820px) { .panel__grid { grid-template-columns: 1fr; } }
.panel h3 { margin: 10px 0 14px; }
.panel__out { border-top: 1px solid var(--ink); padding-top: 16px; }
.panel__out .field-k { display: block; color: var(--signal); margin-bottom: 8px; }
.panel ul { padding-left: 1.05em; margin: 0.4em 0 0; }
.panel li { font-size: 0.97rem; margin-bottom: 0.45em; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--rule); border-radius: 2px; }
table { width: 100%; border-collapse: collapse; background: var(--card); min-width: 680px; }
th, td { text-align: left; padding: 15px 18px; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
th { color: var(--muted); background: var(--paper); border-bottom: 1px solid var(--ink); }
tbody tr:last-child td { border-bottom: 0; }
td:first-child { font-family: var(--f-display); font-weight: 600; letter-spacing: -0.01em; }
td { font-size: 0.96rem; }
.pill {
  display: inline-block; margin-top: 7px;
  font-family: var(--f-mono); font-size: 0.6rem; letter-spacing: 0.13em;
  text-transform: uppercase; color: var(--signal);
  border: 1px solid var(--signal); border-radius: 2px; padding: 3px 7px;
}

/* ---------- Data panels ---------- */
.dpanel { border: 1px solid var(--rule); background: var(--card); padding: clamp(20px, 2.2vw, 28px); }
.dpanel h4 { margin: 8px 0 6px; font-size: 1.16rem; font-weight: 600; }
.bar { margin-top: 20px; }
.bar__row { display: grid; grid-template-columns: 88px minmax(0,1fr); gap: 14px; align-items: center; margin-bottom: 12px; }
.bar__v { font-family: var(--f-mono); font-size: 0.9rem; font-variant-numeric: tabular-nums; color: var(--ink); }
.bar__track { height: 9px; background: var(--rule-soft); position: relative; }
.bar__fill { position: absolute; inset: 0 auto 0 0; background: var(--signal); }
.bar__k { font-family: var(--f-mono); font-size: 0.63rem; letter-spacing: 0.13em; text-transform: uppercase; color: var(--muted); margin-top: 4px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 22px; }
.split div { border-top: 1px solid var(--ink); padding-top: 12px; }
.split .field-k { display: block; color: var(--muted); margin-bottom: 8px; }
.split .field-v { font-family: var(--f-display); font-weight: 600; font-size: 2rem; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }

/* ---------- Big figure ---------- */
.bigfig { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
@media (max-width: 860px) { .bigfig { grid-template-columns: 1fr; } }
.bigfig__n {
  font-family: var(--f-display); font-weight: 600;
  font-size: clamp(3.2rem, 8vw, 6.4rem);
  letter-spacing: -0.04em; line-height: 0.92; font-variant-numeric: tabular-nums;
}
.bigfig__u { font-family: var(--f-display); font-weight: 600; font-size: clamp(1.2rem, 2vw, 1.7rem); letter-spacing: -0.02em; margin-top: 8px; max-width: 18ch; }

/* ---------- Cross-section diagram ---------- */
.xsec { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 3vw, 40px); margin-top: 2.6rem; }
@media (max-width: 760px) { .xsec { grid-template-columns: 1fr; } }
.xsec figure { margin: 0; border: 1px solid var(--rule); background: var(--card); padding: 20px; }
.xsec figcaption { margin-top: 16px; }
.xsec figcaption .field-k { display: block; color: var(--signal); margin-bottom: 8px; }
.xsec figcaption p { font-size: 0.94rem; color: var(--ink-2); margin: 0; }
.xsec svg { width: 100%; height: auto; }

/* ---------- Media ---------- */
.mediablock { display: grid; grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr); gap: clamp(24px, 4vw, 56px); align-items: center; }
@media (max-width: 860px) { .mediablock { grid-template-columns: 1fr; } }
.mediablock video, .frame video {
  width: 100%; background: #0A1013; border: 1px solid var(--rule); border-radius: 2px;
}
.section--dark .mediablock video { border-color: var(--rule-dk); }
.mediablock .meta { display: block; color: var(--muted); margin-top: 12px; letter-spacing: 0.13em; }

/* ---------- Evidence library ---------- */
.evcard { border: 1px solid var(--rule); background: var(--card); display: flex; flex-direction: column; }
.evcard img { aspect-ratio: 16/10; object-fit: cover; border-bottom: 1px solid var(--rule); background: var(--rule-soft); }
.evcard__b { padding: 20px 20px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.evcard h4 { font-size: 1.1rem; }
.evcard p { font-size: 0.94rem; color: var(--ink-2); margin: 0; }
.evcard a { margin-top: auto; }
.dl {
  font-family: var(--f-mono); font-size: 0.68rem; letter-spacing: 0.14em;
  text-transform: uppercase; text-decoration: none; color: var(--signal);
  border-bottom: 1px solid var(--signal); padding-bottom: 3px; align-self: flex-start;
}
.dl:hover { color: var(--ink); border-color: var(--ink); }

/* ---------- Tiers ---------- */
.tier { border-top: 2px solid var(--signal); padding-top: 18px; }
.tier .tag { display: block; color: var(--signal); margin-bottom: 12px; }
.tier--2 { border-top-color: var(--ink-2); }
.tier--2 .tag { color: var(--ink-2); }
.tier--3 { border-top-color: var(--muted); }
.tier--3 .tag { color: var(--muted); }
.tier h3 { font-size: 1.2rem; margin-bottom: 10px; }
.tier__states { font-family: var(--f-display); font-weight: 600; font-size: 1.02rem; letter-spacing: -0.01em; margin: 0 0 10px; }
.tier p { font-size: 0.95rem; color: var(--ink-2); }

/* ---------- Corridors ---------- */
.corridors { list-style: none; margin: 0; padding: 0; counter-reset: c; border-top: 1px solid var(--ink); }
.corridors li {
  counter-increment: c;
  display: grid; grid-template-columns: 54px minmax(0,1fr);
  gap: 14px; padding-block: 15px; border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.corridors li::before {
  content: "0" counter(c);
  font-family: var(--f-mono); font-size: 0.68rem; letter-spacing: 0.14em; color: var(--signal);
}
.corridors span { font-family: var(--f-display); font-weight: 600; font-size: 1.05rem; letter-spacing: -0.012em; }

/* ---------- State profiles (accordion) ---------- */
.states { border-top: 1px solid var(--ink); }
.state { border-bottom: 1px solid var(--rule); }
.state__btn {
  width: 100%; display: grid; grid-template-columns: 92px minmax(0,1fr) 28px;
  gap: 14px; align-items: center; text-align: left;
  background: none; border: 0; cursor: pointer; padding: 18px 0;
  font-family: inherit; color: var(--ink);
}
.state__btn:hover .state__name { color: var(--signal); }
.state__btn:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }
.state__tier { font-family: var(--f-mono); font-size: 0.64rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--signal); }
.state--t2 .state__tier { color: var(--ink-2); }
.state--t3 .state__tier { color: var(--muted); }
.state__name { font-family: var(--f-display); font-weight: 600; font-size: 1.32rem; letter-spacing: -0.02em; }
.state__ind { font-family: var(--f-mono); font-size: 1.1rem; color: var(--muted); justify-self: end; }
.state__body { padding: 0 0 26px; }
.state__body[hidden] { display: none; }
.fields { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px 32px; }
@media (max-width: 720px) { .fields { grid-template-columns: 1fr; } .state__btn { grid-template-columns: 78px minmax(0,1fr) 24px; } }
.field { border-top: 1px solid var(--rule); padding-top: 12px; }
.field .field-k { display: block; color: var(--muted); margin-bottom: 7px; }
.field p { font-size: 0.95rem; margin: 0; color: var(--ink-2); }
.field--wide { grid-column: 1 / -1; }
.field--imp { border-top-color: var(--signal); }
.field--imp .field-k { color: var(--signal); }

/* ---------- Sources ---------- */
.sources { display: grid; gap: 1px; background: var(--rule-dk); border: 1px solid var(--rule-dk); }
.src {
  background: var(--deep-2); padding: 20px 22px; text-decoration: none;
  display: grid; grid-template-columns: 40px minmax(0,1fr) 24px; gap: 16px;
  transition: background 0.16s ease;
}
.src:hover { background: var(--deep-3); }
.src__n { font-family: var(--f-mono); font-size: 0.72rem; color: var(--signal-lt); letter-spacing: 0.1em; }
.src__t { font-family: var(--f-display); font-weight: 600; font-size: 1.04rem; letter-spacing: -0.014em; color: #F0F5F6; }
.src__a { font-family: var(--f-mono); font-size: 0.64rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--signal-lt); margin-top: 7px; display: block; }
.src__d { font-size: 0.93rem; color: var(--muted-dk); margin: 8px 0 0; max-width: 70ch; }
.src__x { font-family: var(--f-mono); color: var(--muted-dk); justify-self: end; }
.src:hover .src__x { color: #F0F5F6; }

/* ---------- Citation marks ---------- */
.cit {
  font-family: var(--f-mono); font-size: 0.62rem; text-decoration: none;
  color: var(--signal); vertical-align: super; padding-left: 2px;
}
.cit:hover { text-decoration: underline; }
.section--dark .cit { color: var(--signal-lt); }

/* ---------- Routing ---------- */
.route {
  display: block; text-decoration: none; border-top: 1px solid var(--ink);
  padding: 16px 0 20px;
}
.route .field-k { display: block; color: var(--muted); margin-bottom: 10px; }
.route__t { font-family: var(--f-display); font-weight: 600; font-size: 1.16rem; letter-spacing: -0.018em; }
.route:hover .route__t { color: var(--signal); }

/* ---------- CTA + footer ---------- */
.cta { text-align: left; }
.cta h2 { max-width: 26ch; }
.cta__creed {
  font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--muted-dk); margin: 1.6rem 0 2.4rem;
  line-height: 2.1;
}
.site-foot { background: var(--deep-2); color: var(--muted-dk); padding-block: 44px; }
.site-foot__in { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; }
.site-foot img { height: 44px; width: auto; }
.site-foot p { font-size: 0.9rem; max-width: 42ch; margin: 0; }
.site-foot a { font-family: var(--f-mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; text-decoration: none; color: #CBDBDF; }
.site-foot a:hover { color: #FFF; }
.legal { font-family: var(--f-mono); font-size: 0.63rem; letter-spacing: 0.1em; color: #6C8189; text-transform: uppercase; margin-top: 26px; }

/* ---------- Reveal ---------- */
.rv { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .rv { opacity: 1; transform: none; transition: none; } }

/* ---------- Focus & skip ---------- */
:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }
.skip {
  position: absolute; left: -9999px; top: 0; z-index: 99;
  background: var(--ink); color: var(--paper); padding: 12px 18px;
  font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase;
}
.skip:focus { left: 8px; top: 8px; }

/* ---------- Editorial review flag (remove before launch) ---------- */
.draft {
  border: 1px dashed var(--caution);
  background: rgba(138, 90, 18, 0.06);
}
.draft::before {
  content: "DRAFT COPY — REVIEW";
  display: block; font-family: var(--f-mono); font-size: 0.6rem;
  letter-spacing: 0.16em; color: var(--caution); margin-bottom: 12px;
}