:root {
  /* Palette */
  --bg0: #040608;
  --bg1: #080b10;
  --bg2: #0b1117;
  --text: rgba(236,242,255,0.92);
  --muted: rgba(236,242,255,0.70);
  --faint: rgba(236,242,255,0.50);

  /* Surfaces */
  --surface: rgba(255,255,255,0.035);
  --surface2: rgba(255,255,255,0.055);
  --surface3: rgba(255,255,255,0.075);
  --border: rgba(255,255,255,0.10);
  --border2: rgba(255,255,255,0.16);

  /* Accents */
  --accent: #46d39a;
  --accent2: #7dd3fc;
  --danger: #f25f5c;

  /* Effects */
  --shadow-lg: 0 22px 60px rgba(0,0,0,0.35);
  --shadow-md: 0 12px 30px rgba(0,0,0,0.30);
  --shadow-sm: 0 8px 20px rgba(0,0,0,0.25);

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --ring: 0 0 0 3px rgba(70,211,154,0.25);
  --ring2: 0 0 0 3px rgba(125,211,252,0.25);

  --sans: "Montserrat", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  background:
    linear-gradient(180deg, var(--bg2), var(--bg0) 70%),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.03) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 26px);
  color: var(--text);
  min-height: 100vh;
  position: relative;
}

/* Subtle grain/noise without assets */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.06;
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.08) 0 1px, transparent 1px 5px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.06) 0 1px, transparent 1px 7px);
  mix-blend-mode: soft-light;
}

main, header, footer { position: relative; z-index: 1; }

a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.22);
}

a:hover { border-bottom-color: rgba(255,255,255,0.45); }

a:focus-visible { outline: none; box-shadow: var(--ring); border-radius: 6px; }

.container {
  width: min(1120px, calc(100% - 44px));
  margin: 0 auto;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
}

.brand { display: flex; gap: 14px; align-items: center; }

.logo {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: rgba(70,211,154,0.18);
  border: 1px solid rgba(70,211,154,0.5);
  color: #c5f2df;
  font-weight: 900;
  letter-spacing: 0.4px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

.brand-name { font-weight: 850; letter-spacing: -0.01em; }
.brand-sub { color: var(--muted); font-size: 14px; }

.nav {
  display: flex;
  gap: 18px;
  align-items: center;
}

.nav a {
  color: var(--muted);
  border-bottom: none;
  padding: 8px 10px;
  border-radius: 8px;
}

.nav a:hover {
  color: var(--text);
  background: rgba(255,255,255,0.05);
  border-bottom: none;
}

.hero { padding: 62px 0 34px; }

.hero-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 34px;
  align-items: start;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(36px, 3.6vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.lede {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.section {
  padding: 52px 0;
  position: relative;
}

.section::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
  opacity: 0.6;
}

.section.alt {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
}

h2 {
  margin: 0 0 18px;
  font-size: 26px;
  letter-spacing: -0.02em;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.22);
  background: rgba(255,255,255,0.045);
}

.card h3 { margin: 0 0 10px; font-size: 18px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); line-height: 1.6; }
.card ul { margin: 0; padding-left: 18px; color: var(--muted); line-height: 1.65; }

.how-card {
  position: relative;
  overflow: hidden;
}

.how-card .card-num {
  position: absolute;
  right: 16px;
  bottom: -8px;
  font-family: var(--mono);
  font-size: clamp(84px, 10vw, 140px);
  font-weight: 700;
  letter-spacing: -0.06em;
  color: rgba(150, 220, 190, 0.08);
  pointer-events: none;
}

.how-card h3,
.how-card p {
  position: relative;
  z-index: 1;
}

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 18px 0 10px; }
.cta-row-bottom { justify-content: center; margin-top: 24px; }

.btn {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 8px;
  padding: 14px 22px;
  font-weight: 820;
  font-size: 15px;
  cursor: pointer;
  background: rgba(255,255,255,0.04);
  color: var(--text);
  transition: transform 120ms ease, filter 120ms ease, border-color 120ms ease, background 120ms ease;
}

.btn:hover { transform: translateY(-1px); border-color: rgba(255,255,255,0.28); filter: brightness(1.05); }
.btn:active { transform: translateY(0px); filter: brightness(0.98); }
.btn:focus-visible { outline: none; box-shadow: var(--ring); }

.btn-primary {
  background: rgba(70,211,154,0.18);
  border-color: rgba(70,211,154,0.55);
  box-shadow: 0 14px 40px rgba(70,211,154,0.18);
}

.btn-primary:focus-visible { box-shadow: var(--ring); }

.btn-secondary {
  background: rgba(125,211,252,0.18);
  border-color: rgba(125,211,252,0.55);
  color: #d9f2ff;
  box-shadow: 0 14px 40px rgba(125,211,252,0.15);
}

.btn-secondary:focus-visible { box-shadow: var(--ring2); }

.btn-ghost {
  background: transparent;
  border-color: rgba(255,255,255,0.16);
}

.fineprint { color: var(--faint); font-size: 13px; line-height: 1.5; }

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 34px 0 46px;
}

.orderbook {
  border: 1px solid var(--border2);
  border-radius: var(--radius-md);
  background: rgba(8,14,20,0.85);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.hero-orderbook { align-self: start; }

.orderbook-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}

.orderbook-market {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--faint);
}

.orderbook-model {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-top: 6px;
}

.orderbook-meta {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--faint);
  display: grid;
  gap: 6px;
  text-align: right;
}

.orderbook-stack {
  display: grid;
  gap: 2px;
}

.orderbook-side {
  padding: 6px 12px 10px;
  font-family: var(--mono);
  font-size: 11px;
}

.orderbook-side-title {
  display: grid;
  grid-template-columns: 1fr minmax(90px, 1fr) 1fr;
  align-items: baseline;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--faint);
  margin: 6px 4px 6px;
}

.orderbook-side-title span {
  letter-spacing: 0.12em;
  color: rgba(236,242,255,0.42);
  text-align: center;
}

.orderbook-side-title span:first-child { text-align: left; }
.orderbook-side-title span:last-child { text-align: right; }

.orderbook-row {
  display: grid;
  grid-template-columns: 1fr minmax(90px, 1fr) 1fr;
  gap: 12px;
  padding: 5px 8px;
  border-radius: 0;
  background: rgba(255,255,255,0.03);
  color: var(--muted);
}

.orderbook-row + .orderbook-row { margin-top: 0; }

.orderbook-row div:first-child { text-align: left; }
.orderbook-row div:nth-child(2) { text-align: center; }
.orderbook-row div:last-child { text-align: right; }

.bids .orderbook-row div:nth-child(2) { color: #9cf0c8; }
.asks .orderbook-row div:nth-child(2) { color: #ffb2b0; }

.orderbook-midline {
  display: grid;
  grid-template-columns: 1fr minmax(90px, 1fr) 1fr;
  align-items: center;
  padding: 8px 14px;
  border-top: 1px solid rgba(255,255,255,0.14);
  border-bottom: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.025);
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--faint);
}

.orderbook-last {
  text-align: center;
  font-weight: 700;
  color: var(--text);
}

.orderbook-spread { text-align: right; }

/* Modal */
.modal::backdrop { background: rgba(0,0,0,0.70); }

.modal {
  width: min(740px, calc(100% - 32px));
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 22px;
  padding: 0;
  background:
    linear-gradient(180deg, rgba(9,13,18,0.98), rgba(6,9,12,0.98));
  box-shadow: 0 34px 120px rgba(0,0,0,0.70);
  color: var(--text);
}

.modal-inner { padding: 16px 16px 14px; }

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 16px;
  margin-bottom: 12px;
}

.modal-title { font-weight: 900; font-size: 18px; letter-spacing: -0.01em; }
.modal-sub { color: var(--muted); font-size: 13px; margin-top: 4px; line-height: 1.5; }

.icon-btn {
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  border-radius: 8px;
  width: 38px;
  height: 38px;
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}

.icon-btn:hover { transform: translateY(-1px); border-color: rgba(255,255,255,0.28); background: rgba(255,255,255,0.07); }
.icon-btn:active { transform: translateY(0px); }
.icon-btn:focus-visible { outline: none; box-shadow: var(--ring); }

.field { display: grid; gap: 8px; margin: 12px 0; }

.field span {
  color: rgba(255,255,255,0.55);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
}

input, textarea {
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  padding: 11px 12px;
  font-size: 14px;
  outline: none;
}

input::placeholder, textarea::placeholder { color: rgba(255,255,255,0.38); }

input:focus, textarea:focus {
  border-color: rgba(70,211,154,0.65);
  box-shadow: var(--ring);
  background: rgba(255,255,255,0.06);
}

.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 14px; }

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .orderbook-header { align-items: flex-start; gap: 12px; flex-direction: column; }
  .orderbook-meta { text-align: left; }
  .nav { display: none; }
  .container { width: min(1120px, calc(100% - 32px)); }
  .hero { padding: 54px 0 28px; }
}