:root {
  --ground: #f5f4ee;
  --surface: #ffffff;
  --raised: #f0efe8;
  --ink: #0e1020;
  --ink-2: #4a4d60;
  --ink-3: #8c8fa6;
  --border: rgba(11, 14, 26, 0.1);
  --rule: rgba(11, 14, 26, 0.06);
  --gold: #b8922a;
  --gold-soft: rgba(184, 146, 42, 0.1);
  --pos: #1a7a5e;
  --neg: #b04040;
  --info: #2e5fa3;
  --warn: #a0620e;
  --void: #05060a;
  --void-2: #0f1118;
  --acid: #b8f11a;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-ui: "Inter Tight", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 4px;
  --shadow: 0 1px 3px rgba(11, 14, 26, 0.05), 0 0 0 1px rgba(11, 14, 26, 0.07);
}

* { box-sizing: border-box; }

html {
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
}

html.auth-pending body > * {
  visibility: hidden;
}

body {
  margin: 0;
  background:
    linear-gradient(to right, rgba(11, 14, 26, 0.035) 1px, transparent 1px) 0 0 / 80px 80px,
    linear-gradient(to bottom, rgba(11, 14, 26, 0.035) 1px, transparent 1px) 0 0 / 80px 80px,
    var(--ground);
}

.grid-trace {
  position: absolute;
  inset: 0 -6% -8% 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.58;
  mix-blend-mode: multiply;
}

.grid-trace svg {
  width: 100%;
  height: 100%;
  display: block;
}

.grid-trace path,
.grid-trace circle {
  vector-effect: non-scaling-stroke;
}

.grid-trace-shadow,
.grid-trace-line,
.grid-trace-pulse {
  fill: none;
}

.grid-trace-shadow {
  stroke: rgba(184, 146, 42, 0.055);
  stroke-width: 34;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: trace-draw 7s cubic-bezier(0.55, 0, 0.2, 1) infinite;
}

.grid-trace-line {
  stroke: rgba(184, 146, 42, 0.2);
  stroke-width: 1.15;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: trace-draw 7s cubic-bezier(0.55, 0, 0.2, 1) infinite;
}

.grid-trace-pulse {
  stroke: rgba(26, 122, 94, 0.28);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 0.08 0.92;
  stroke-dashoffset: 1;
  animation: trace-pulse 7s cubic-bezier(0.55, 0, 0.2, 1) infinite;
}

.grid-trace-dot {
  fill: var(--pos);
  opacity: 0.56;
  filter: drop-shadow(0 0 9px rgba(26, 122, 94, 0.24));
}

@keyframes trace-draw {
  0% { stroke-dashoffset: 1; opacity: 0; }
  12% { opacity: 1; }
  58% { stroke-dashoffset: 0; opacity: 1; }
  78% { stroke-dashoffset: 0; opacity: 0.42; }
  100% { stroke-dashoffset: 0; opacity: 0; }
}

@keyframes trace-pulse {
  0% { stroke-dashoffset: 1; opacity: 0; }
  10% { opacity: 1; }
  68% { stroke-dashoffset: 0; opacity: 1; }
  100% { stroke-dashoffset: -0.18; opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .grid-trace { display: none; }
}

body.dark-page {
  background:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px) 0 0 / 80px 80px,
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px) 0 0 / 80px 80px,
    var(--void);
  color: #f4f5fa;
}

a { color: inherit; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 32px;
  background: rgba(245, 244, 238, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.dark-page .site-nav {
  background: rgba(5, 6, 10, 0.9);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-width: 118px;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.04em;
}

.brand-mark {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: var(--ground);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.dark-page .brand-mark {
  background: var(--acid);
  color: var(--void);
}

.auth-locked {
  min-height: 100vh;
  overflow: hidden;
}

.auth-locked > :not(.password-gate) {
  visibility: hidden;
}

.password-gate {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    linear-gradient(to right, rgba(11, 14, 26, 0.035) 1px, transparent 1px) 0 0 / 80px 80px,
    linear-gradient(to bottom, rgba(11, 14, 26, 0.035) 1px, transparent 1px) 0 0 / 80px 80px,
    var(--ground);
}

.password-card {
  width: min(100%, 430px);
  padding: 30px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.password-card h1 {
  margin: 14px 0 10px;
  font: 600 34px/1 var(--font-display);
  letter-spacing: 0;
}

.password-card p {
  margin: 0 0 22px;
  color: var(--ink-2);
  line-height: 1.55;
}

.password-card label {
  display: block;
  margin-bottom: 7px;
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.password-card input {
  width: 100%;
  height: 44px;
  margin-bottom: 14px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font: 500 15px var(--font-ui);
}

.password-card input:focus {
  outline: 2px solid rgba(184, 146, 42, 0.24);
  border-color: rgba(184, 146, 42, 0.55);
}

.password-card .password-error {
  margin: -2px 0 14px;
  color: var(--neg);
  font-size: 13px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 13px;
  color: var(--ink-2);
}

.dark-page .nav-links { color: #b6bac9; }

.nav-links a {
  text-decoration: none;
  line-height: 64px;
  border-bottom: 1.5px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
  border-bottom-color: var(--gold);
}

.dark-page .nav-links a:hover,
.dark-page .nav-links a.active {
  color: #f4f5fa;
  border-bottom-color: var(--acid);
}

.nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.dark-page .status-pill {
  border-color: rgba(255, 255, 255, 0.12);
  color: #b6bac9;
}

.dot {
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: var(--gold);
}

.dark-page .dot { background: var(--acid); }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--ink);
  font: 560 13px var(--font-ui);
  text-decoration: none;
  cursor: pointer;
}

.button.primary {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--ground);
}

.button.gold {
  color: var(--gold);
  border-color: rgba(184, 146, 42, 0.42);
}

.dark-page .button {
  color: #f4f5fa;
  border-color: rgba(255, 255, 255, 0.15);
}

.dark-page .button.primary {
  background: var(--acid);
  border-color: var(--acid);
  color: var(--void);
}

.container {
  width: min(1180px, calc(100vw - 40px));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 38%;
  background: url("ArCa Design System/assets/pattern-ledger-light.svg") center / 320px 80px repeat;
  opacity: 0.18;
  z-index: 0;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 80px 0 104px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  color: var(--ink-3);
  font: 500 11px var(--font-mono);
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 10ch;
  font-family: var(--font-display);
  font-size: clamp(64px, 13vw, 152px);
  line-height: 0.88;
  letter-spacing: -0.06em;
}

.hero h1 span { color: var(--gold); }

.hero-copy {
  max-width: 680px;
  margin-top: 28px;
  color: var(--ink-2);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
}

.hero-note {
  color: var(--ink-3);
  font: 400 11px var(--font-mono);
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 54px;
  width: min(900px, 100%);
  border: 1px solid var(--border);
  background: var(--border);
  box-shadow: var(--shadow);
}

.metric {
  min-height: 118px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.82);
}

.metric-label {
  color: var(--ink-3);
  font: 500 10px var(--font-mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.metric-value {
  margin-top: 11px;
  color: var(--ink);
  font: 500 28px var(--font-mono);
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums lining-nums;
}

.metric-sub {
  margin-top: 8px;
  color: var(--ink-3);
  font: 400 11px var(--font-mono);
}

.section {
  padding: 88px 0;
  border-bottom: 1px solid var(--rule);
}

.section.dark {
  background: var(--void);
  color: #f4f5fa;
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 32px;
  margin-bottom: 32px;
}

.section h2 {
  margin: 0;
  max-width: 700px;
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

.section-lede {
  max-width: 520px;
  margin: 0;
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.58;
}

.dark .section-lede { color: #b6bac9; }

.grid {
  display: grid;
  gap: 14px;
}

.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.grid.four { grid-template-columns: repeat(4, 1fr); }
.grid.five { grid-template-columns: repeat(5, 1fr); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.dark .card {
  background: var(--void-2);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.card-label {
  color: var(--ink-3);
  font: 500 10px var(--font-mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.dark .card-label { color: #7b8094; }

.card h3 {
  margin: 12px 0 10px;
  font-size: 22px;
  line-height: 1.16;
  letter-spacing: -0.02em;
}

.card p {
  margin: 0;
  color: var(--ink-2);
  line-height: 1.55;
}

.dark .card p { color: #b6bac9; }

.register {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.register-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}

.register-title {
  font-size: 14px;
  font-weight: 620;
}

.register-meta {
  color: var(--ink-3);
  font: 500 10px var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th {
  padding: 11px 18px;
  text-align: left;
  background: var(--raised);
  border-bottom: 1px solid var(--border);
  color: var(--ink-3);
  font: 500 10px var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

td {
  padding: 13px 18px;
  border-bottom: 1px solid rgba(11, 14, 26, 0.045);
  color: var(--ink);
}

td.num, th.num {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums lining-nums;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px;
  border-radius: 2px;
  font: 500 10px var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.chip.pos { color: var(--pos); background: rgba(26, 122, 94, 0.08); border: 1px solid rgba(26, 122, 94, 0.22); }
.chip.info { color: var(--info); background: rgba(46, 95, 163, 0.08); border: 1px solid rgba(46, 95, 163, 0.22); }
.chip.warn { color: var(--warn); background: rgba(160, 98, 14, 0.08); border: 1px solid rgba(160, 98, 14, 0.22); }
.chip.gold { color: var(--gold); background: var(--gold-soft); border: 1px solid rgba(184, 146, 42, 0.24); }

.visual {
  min-height: 360px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    url("ArCa Design System/assets/pattern-ledger-light.svg") center / 320px 80px repeat,
    var(--surface);
  box-shadow: var(--shadow);
}

.dark .visual {
  background:
    url("ArCa Design System/assets/pattern-ledger-dark.svg") center / 320px 80px repeat,
    var(--void-2);
  border-color: rgba(255, 255, 255, 0.08);
}

.terminal {
  padding: 20px;
  background: var(--void);
  color: #f4f5fa;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  font-family: var(--font-mono);
}

.terminal-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 11px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #b6bac9;
  font-size: 12px;
}

.terminal-row:last-child { border-bottom: 0; }
.terminal-row > :last-child {
  text-align: right;
  overflow-wrap: anywhere;
}
.terminal b { color: var(--acid); font-weight: 500; }
.terminal .gold-text { color: #d7b870; }

.terminal.light-terminal {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--border);
  box-shadow: var(--shadow);
}

.light-terminal .terminal-row {
  color: var(--ink-2);
  border-bottom-color: var(--border);
}

.light-terminal b {
  color: var(--gold);
}

.light-terminal .gold-text {
  color: var(--gold);
}

.asset-figure {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.page-hero {
  padding: 80px 0 70px;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  margin: 0;
  max-width: 860px;
  font-family: var(--font-display);
  font-size: clamp(44px, 7vw, 86px);
  line-height: 0.94;
  letter-spacing: -0.055em;
}

.page-hero p {
  max-width: 650px;
  margin: 24px 0 0;
  color: var(--ink-2);
  font-size: 18px;
  line-height: 1.52;
}

.dark-page .page-hero {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.dark-page .page-hero p { color: #b6bac9; }

.disclosure {
  padding: 22px 0 44px;
  color: var(--ink-3);
  font-size: 12px;
  line-height: 1.55;
}

.dark-page .disclosure { color: #7b8094; }

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 22px;
  align-items: start;
}

.timeline {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 20px;
  background: var(--surface);
}

.timeline-date {
  color: var(--gold);
  font: 500 12px var(--font-mono);
}

.timeline-item h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.timeline-item p {
  margin: 0;
  color: var(--ink-2);
  line-height: 1.5;
}

.faq-list {
  display: grid;
  gap: 8px;
}

.faq-list details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.faq-list summary {
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 620;
  list-style-position: inside;
}

.faq-list p {
  margin: 0;
  padding: 0 20px 18px 40px;
  color: var(--ink-2);
  line-height: 1.55;
}

.cta-card {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 42px;
}

.cta-card h2 {
  margin: 10px auto 12px;
  max-width: 680px;
}

.cta-card p {
  max-width: 560px;
  margin: 0 auto;
}

.calculator-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field label {
  color: var(--ink-3);
  font: 500 10px var(--font-mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.input-affix {
  display: flex;
  height: 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--ground);
  overflow: hidden;
}

.input-affix span,
.input-affix select {
  min-width: 82px;
  padding: 0 13px;
  border: 0;
  border-right: 1px solid var(--border);
  background: var(--raised);
  color: var(--ink-2);
  font: 500 12px var(--font-mono);
}

.input-affix span {
  display: inline-flex;
  align-items: center;
}

.input-affix select {
  outline: 0;
}

.input-affix input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  padding: 0 14px;
  color: var(--ink);
  font: 500 18px var(--font-mono);
  font-variant-numeric: tabular-nums lining-nums;
}

.field-help {
  color: var(--ink-3);
  font-size: 12px;
  line-height: 1.4;
}

.calculator-meta {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  margin-top: 22px;
  background: var(--border);
  border: 1px solid var(--border);
}

.calculator-meta > div {
  min-height: 94px;
  padding: 16px;
  background: var(--surface);
}

.calculator-meta strong {
  display: block;
  margin-top: 10px;
  color: var(--ink);
  font: 500 18px var(--font-mono);
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums lining-nums;
}

.gold-note {
  margin-top: 18px;
  padding: 16px;
  background: var(--gold-soft);
  border: 1px solid rgba(184, 146, 42, 0.22);
  border-radius: var(--radius);
}

.gold-note p {
  margin: 8px 0 0;
  color: var(--ink-2);
  line-height: 1.5;
}

.calculator-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.calculator-footer p {
  max-width: 720px;
  margin: 0;
  color: var(--ink-3);
  font-size: 12px;
  line-height: 1.45;
}

@media (max-width: 900px) {
  .site-nav {
    height: auto;
    align-items: flex-start;
    flex-wrap: wrap;
    padding: 14px 18px;
    gap: 12px;
  }
  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
    gap: 18px;
  }
  .nav-links a { line-height: 28px; white-space: nowrap; }
  .nav-actions { margin-left: 0; }
  .status-pill { display: none; }
  .hero { min-height: auto; }
  .hero-inner { padding: 60px 0 76px; }
  .metric-strip,
  .grid.three,
  .grid.four,
  .grid.five,
  .grid.two,
  .split,
  .calculator-grid,
  .calculator-meta {
    grid-template-columns: 1fr;
  }
  .calculator-footer {
    display: block;
  }
  .calculator-footer .button {
    margin-top: 16px;
  }
  .section-head {
    display: block;
  }
  .section-lede {
    margin-top: 16px;
  }
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .terminal-row {
    display: block;
  }
  .terminal-row > :last-child {
    display: block;
    margin-top: 6px;
    text-align: left;
  }
  table {
    min-width: 720px;
  }
  .register {
    overflow-x: auto;
  }
}

@media (max-width: 560px) {
  .container { width: min(100% - 28px, 1180px); }
  .nav-actions .button { display: none; }
  .hero-copy, .page-hero p { font-size: 16px; }
  .metric { min-height: 96px; }
  .section { padding: 62px 0; }
  .card, .visual { padding: 18px; }
}