/* TKN — brutalist OLED marketing site. Mirrors the app's design language. */
:root {
  --bg: #000;
  --surface: #0a0a0a;
  --border: #262626;
  --border2: #404040;
  --text: #fff;
  --dim: #a3a3a3;
  --muted: #737373;
  --faint: #525252;
  --live: #00ff00;
  --kill: #ff0000;
  --warn: #ff8c5a;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
::selection {
  background: var(--live);
  color: #000;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}
.mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}
.label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.green {
  color: var(--live);
}
.red {
  color: var(--kill);
}

/* nav */
header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.12em;
}
.brand .dot {
  color: var(--live);
}
.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}
.nav-links a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.nav-links a:hover {
  color: var(--text);
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 20px;
  border: 1px solid var(--live);
  color: #000;
  background: var(--live);
  font-weight: 700;
}
.btn:hover {
  background: #fff;
  border-color: #fff;
}
.btn.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border2);
}
.btn.ghost:hover {
  border-color: #fff;
  background: transparent;
}

/* sections */
section {
  border-top: 1px solid var(--border);
  padding: 88px 0;
}
.eyebrow {
  margin-bottom: 16px;
}
h1 {
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 700;
}
h2 {
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.02em;
  font-weight: 700;
}
h3 {
  font-size: 18px;
  font-weight: 600;
}
.lead {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--dim);
  max-width: 60ch;
  margin-top: 20px;
}

/* hero */
.hero {
  border-top: none;
  padding-top: 64px;
}
.hero h1 .strike {
  color: var(--muted);
  text-decoration: line-through;
  text-decoration-color: var(--kill);
}
.hero-cta {
  display: flex;
  gap: 14px;
  margin-top: 36px;
  flex-wrap: wrap;
  align-items: center;
}
.hero-note {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
  margin-top: 18px;
  letter-spacing: 0.04em;
}

/* the spend readout panel */
.readout {
  margin-top: 56px;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 24px;
}
.readout-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.readout .big {
  font-family: var(--mono);
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
}
.readout .big .cents {
  color: var(--muted);
  font-size: 0.55em;
}
.bars {
  display: flex;
  gap: 4px;
  margin-top: 20px;
  height: 40px;
  align-items: flex-end;
}
.bars span {
  flex: 1;
  background: var(--live);
  opacity: 0.5;
}
.bars span.hot {
  background: var(--kill);
  opacity: 1;
}

/* feature grid */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 48px;
  border: 1px solid var(--border);
}
.card {
  padding: 28px;
  border-right: 1px solid var(--border);
}
.card:last-child {
  border-right: none;
}
.card .tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--live);
}
.card h3 {
  margin: 14px 0 10px;
}
.card p {
  color: var(--dim);
  font-size: 15px;
}

/* steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.step .num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.1em;
}
.step h3 {
  margin: 10px 0 8px;
}
.step p {
  color: var(--dim);
  font-size: 15px;
}

/* pricing */
.tiers {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  margin-top: 48px;
  border: 1px solid var(--border);
}
.tier {
  padding: 36px;
  border-right: 1px solid var(--border);
}
.tier:last-child {
  border-right: none;
}
.tier.pro {
  background: var(--surface);
}
.tier .price {
  font-family: var(--mono);
  font-size: 44px;
  font-weight: 500;
  margin: 16px 0;
  letter-spacing: -0.02em;
}
.tier .price small {
  font-size: 16px;
  color: var(--muted);
}
.tier ul {
  list-style: none;
  margin: 20px 0 28px;
}
.tier li {
  font-size: 15px;
  color: var(--dim);
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
}
.tier li::before {
  content: "› ";
  color: var(--live);
  font-family: var(--mono);
}

/* footer */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}
.foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.foot-links {
  display: flex;
  gap: 24px;
}
.foot-links a,
.foot small {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.foot-links a:hover {
  color: var(--text);
}

/* legal / support pages */
.doc {
  padding: 64px 0 96px;
}
.doc .wrap {
  max-width: 760px;
}
.doc h1 {
  font-size: clamp(32px, 5vw, 48px);
  margin-bottom: 8px;
}
.doc h2 {
  font-size: 22px;
  margin: 40px 0 12px;
}
.doc p,
.doc li {
  color: var(--dim);
  margin: 12px 0;
  font-size: 16px;
}
.doc ul {
  padding-left: 22px;
}
.doc a {
  color: var(--live);
  text-decoration: underline;
}
.doc .updated {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
  letter-spacing: 0.06em;
}
.back {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.back:hover {
  color: var(--text);
}

@media (max-width: 760px) {
  .nav-links {
    display: none;
  }
  section {
    padding: 56px 0;
  }
  .grid,
  .steps,
  .tiers {
    grid-template-columns: 1fr;
  }
  .card {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .card:last-child {
    border-bottom: none;
  }
  .tier {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .tier:last-child {
    border-bottom: none;
  }
}