:root {
  --bg: #070809;
  --surface: #0c0e12;
  --elevated: #11141a;
  --border: #1f242d;
  --border-light: #2a303c;
  --text: #d8dde6;
  --muted: #6d7686;
  --accent: #3d7ab8;
  --accent-bright: #5a9ad4;
  --signal: #2d8a7a;
  --warn: #a85c4a;
  --mono: "IBM Plex Mono", "Consolas", monospace;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --max: 1280px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.25;
  pointer-events: none;
  z-index: 0;
}

a { color: var(--accent-bright); text-decoration: none; }
a:hover { color: #7eb3e8; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 40px; position: relative; z-index: 1; }

header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 200;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 8, 9, 0.94);
  backdrop-filter: blur(10px);
}

.header-inner {
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.brand-tag {
  font-family: var(--mono);
  font-size: 10px;
  padding: 3px 7px;
  border: 1px solid var(--border-light);
  color: var(--accent-bright);
}

nav { display: flex; gap: 32px; }

nav a {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

nav a:hover { color: var(--text); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}

.btn-fill {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-fill:hover { background: var(--accent-bright); color: #fff; }

.btn-line {
  background: transparent;
  border-color: var(--border-light);
  color: var(--text);
}

.btn-line:hover { border-color: var(--accent); }

.hero {
  padding: 108px 0 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero-main {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 48px;
  padding: 48px 0 40px;
  flex: 1;
  align-items: center;
}

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 3.8vw, 2.85rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  max-width: 14ch;
}

.lead {
  color: var(--muted);
  font-size: 16px;
  max-width: 46ch;
  margin-bottom: 28px;
}

.hero-btns { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; }

.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border);
}

.facts div {
  padding: 14px 16px;
  border-right: 1px solid var(--border);
  background: var(--surface);
}

.facts div:last-child { border-right: none; }

.facts dt {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

.facts dd { font-size: 13px; font-weight: 500; }

.viz-frame {
  border: 1px solid var(--border-light);
  background: var(--surface);
}

.viz-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

.viz-bar strong { color: var(--text); font-weight: 500; }

#hero-canvas {
  width: 100%;
  display: block;
  aspect-ratio: 5/4;
  background: #080a0d;
}

.viz-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border);
}

.viz-stats div {
  padding: 10px 12px;
  border-right: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 9px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.viz-stats div:last-child { border-right: none; }

.viz-stats span {
  display: block;
  font-size: 13px;
  color: var(--text);
  margin-top: 2px;
  letter-spacing: 0;
  text-transform: none;
}

.ticker {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--elevated);
}

.ticker-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding: 24px 0;
}

.ticker h3 {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 6px;
}

.ticker p { font-size: 13px; color: var(--muted); line-height: 1.45; }

.runtime-block {
  position: relative;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  background: var(--bg);
  padding: 56px 0;
  overflow: hidden;
}

.runtime-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.45;
  pointer-events: none;
}

.runtime-inner {
  position: relative;
  z-index: 1;
  border-left: 3px solid var(--accent);
  padding-left: 28px;
}

.runtime-heading {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 18px;
}

.runtime-primary {
  font-size: clamp(1.35rem, 2.8vw, 2rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 10px;
  max-width: 36ch;
}

.runtime-secondary {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--muted);
  max-width: 36ch;
}

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

.block-head {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.block-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  padding-top: 8px;
}

.block-num em {
  display: block;
  font-style: normal;
  font-size: 32px;
  color: var(--border-light);
  line-height: 1;
  margin-bottom: 8px;
}

.block h2 {
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.block .intro { color: var(--muted); max-width: 62ch; font-size: 15px; }

.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border: 1px solid var(--border);
}

.step {
  padding: 20px 18px;
  border-right: 1px solid var(--border);
  background: var(--surface);
}

.step:last-child { border-right: none; }

.step-id {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--accent);
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.step h3 { font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.step p { font-size: 12px; color: var(--muted); line-height: 1.5; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.panel {
  background: var(--surface);
  padding: 28px;
}

.panel h3 {
  font-size: 13px;
  font-weight: 600;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

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

table.data td {
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

table.data tr:last-child td { border-bottom: none; }

table.data td:first-child {
  color: var(--muted);
  width: 40%;
  padding-right: 20px;
}

table.data code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text);
}

.chart-box {
  margin-top: 32px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.chart-label {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

.chart-label strong { color: var(--text); }

#torque-canvas {
  width: 100%;
  display: block;
  height: 200px;
  background: #0a0c10;
}

.triplet {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 1px;
}

.triplet .panel { border: none; }

.triplet ul {
  list-style: none;
  font-size: 13px;
}

.triplet li {
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
}

.triplet li:last-child { border-bottom: none; }

.triplet code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text);
}

.solver-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.solver-cell {
  background: var(--surface);
  padding: 24px;
}

.solver-cell h4 { font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.solver-cell p { font-size: 13px; color: var(--muted); line-height: 1.5; }

.platform-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.platform-row div,
.platform-card {
  background: var(--surface);
  padding: 22px 18px;
}

.platform-row h4,
.platform-card h4 { font-size: 13px; font-weight: 600; margin-bottom: 6px; }

.platform-row p,
.platform-card p { font-size: 12px; color: var(--muted); line-height: 1.45; }

.platform-card-featured {
  background: var(--elevated);
  border-left: 2px solid var(--accent);
}

.price-card-mobile {
  border-left: 2px solid var(--accent);
}

.desktop-only { display: inline-flex; }

@media (max-width: 1024px) {
  .desktop-only { display: none !important; }
}

.download {
  padding: 72px 0;
  background: var(--elevated);
  border-bottom: 1px solid var(--border);
}

.download-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.download h2 {
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.download p { color: var(--muted); max-width: 50ch; font-size: 15px; }

.download-note {
  margin-top: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  max-width: 60ch;
}

.download-btns { display: flex; gap: 10px; flex-wrap: wrap; }

footer {
  padding: 28px 0;
  font-size: 11px;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
}

@media (max-width: 1024px) {
  .hero-main,
  .block-head,
  .grid-2,
  .steps,
  .solver-grid,
  .platform-row,
  .triplet,
  .ticker-inner {
    grid-template-columns: 1fr;
  }

  .facts { grid-template-columns: 1fr; }
  .facts div { border-right: none; border-bottom: 1px solid var(--border); }
  .facts div:last-child { border-bottom: none; }

  .viz-stats { grid-template-columns: 1fr 1fr; }
  .viz-stats div:nth-child(2) { border-right: none; }

  nav { display: none; }
  .menu-btn { display: block; }

  nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 52px;
    left: 0;
    right: 0;
    background: var(--elevated);
    padding: 16px 40px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }

  .wrap { padding: 0 24px; }

  .pricing-grid,
  .account-row {
    grid-template-columns: 1fr;
  }

  .header-actions .btn-line { display: none; }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.price-card {
  background: var(--panel);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}

.price-card-accent { background: var(--elevated); }

.price-card h3 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.price-amount {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.price-period {
  font-size: 14px;
  color: var(--muted);
  font-weight: 400;
}

.price-note {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
}

.price-features {
  list-style: none;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 24px;
  flex: 1;
}

.price-features li {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.price-features li:last-child { border-bottom: none; }

.price-fine {
  font-size: 11px;
  color: var(--muted);
  margin-top: 10px;
  font-family: var(--mono);
}

.pricing-note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 12px;
  max-width: 52rem;
  line-height: 1.5;
}

.btn-block { width: 100%; margin-top: 8px; }

.account-panel {
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 24px;
}

.account-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.account-note {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.5;
}

.account-label {
  display: block;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

.account-guest {
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.account-guest p { color: var(--muted); font-size: 14px; }

.account-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: none;
  align-items: center;
  justify-content: center;
}

.modal.open { display: flex; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
}

.modal-box {
  position: relative;
  width: min(400px, calc(100vw - 32px));
  background: var(--elevated);
  border: 1px solid var(--border-light);
  padding: 28px;
  z-index: 1;
}

.modal-box h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 22px;
  cursor: pointer;
}

.field {
  display: block;
  margin-bottom: 14px;
}

.field span {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.field input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border-light);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
}

.auth-error {
  font-size: 13px;
  color: var(--warn);
  margin-bottom: 12px;
}

.modal-foot {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
}