/* Zeta Paper — trading / terminal-adjacent UI (shared: landing + legal) */

:root {
  color-scheme: dark;
  --bg: #060708;
  --bg-elevated: #0c0e12;
  --bg-card: rgba(255, 255, 255, 0.035);
  --grid-fg: rgba(62, 207, 142, 0.055);
  --grid-fg-strong: rgba(62, 207, 142, 0.09);
  --text: #e8eaed;
  --text-soft: #a8adb5;
  --text-muted: #6b7280;
  --accent: #3ecf8e;
  --accent-hover: #5ad9a0;
  --accent-glow: rgba(62, 207, 142, 0.22);
  --accent-dim: rgba(62, 207, 142, 0.12);
  --down: #f87171;
  --stroke: rgba(255, 255, 255, 0.07);
  --stroke-strong: rgba(255, 255, 255, 0.11);
  --shadow-sm: 0 1px 0 rgba(255, 255, 255, 0.04) inset;
  --shadow-md: 0 12px 40px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 56px rgba(0, 0, 0, 0.55);
  --radius-pill: 9999px;
  --radius-card: 1rem;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

/* Chart grid — reads “terminal / book” */
body.page-landing::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    linear-gradient(var(--grid-fg) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-fg) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 85% 65% at 50% -15%, #000 22%, transparent 70%);
}

body.page-legal::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(var(--grid-fg) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-fg) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.65;
}

a {
  color: inherit;
  text-decoration: none;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.25rem);
}

/* —— Market strip (landing) —— */
.market-strip {
  border-bottom: 1px solid var(--stroke);
  background: rgba(0, 0, 0, 0.35);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.market-strip-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1.75rem;
  padding: 0.55rem 0;
  color: var(--text-muted);
}

.market-strip .sym strong {
  font-weight: 600;
  color: var(--accent);
  margin-left: 0.35rem;
}

.market-strip .sym-mute {
  font-weight: 500;
  color: var(--text-soft);
  margin-left: 0.35rem;
}

.market-strip .sep {
  color: var(--stroke-strong);
  user-select: none;
}

/* —— Ambient —— */
.bg-stage {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.28;
  will-change: transform;
  animation: blob-drift 24s var(--ease-out) infinite alternate;
}

.blob--1 {
  width: min(55vw, 440px);
  height: min(55vw, 440px);
  background: radial-gradient(circle at 30% 30%, rgba(62, 207, 142, 0.5), transparent 62%);
  top: -18%;
  left: -12%;
  animation-duration: 28s;
}

.blob--2 {
  width: min(45vw, 360px);
  height: min(45vw, 360px);
  background: radial-gradient(circle at 70% 40%, rgba(56, 189, 248, 0.35), transparent 58%);
  bottom: 10%;
  right: -14%;
  animation-duration: 21s;
  animation-delay: -9s;
}

.blob--3 {
  width: min(38vw, 300px);
  height: min(38vw, 300px);
  background: radial-gradient(circle at 50% 50%, rgba(167, 139, 250, 0.2), transparent 55%);
  top: 48%;
  left: 28%;
  opacity: 0.2;
  animation-duration: 32s;
  animation-delay: -5s;
}

@keyframes blob-drift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(36px, -28px) scale(1.06); }
}

@media (prefers-reduced-motion: reduce) {
  .blob { animation: none; opacity: 0.15; }
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  transition: background 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out), border-color 0.35s var(--ease-out);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(6, 7, 8, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--stroke);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  font-family: var(--mono);
  text-transform: uppercase;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  transition: color 0.2s ease;
}

.logo-mark {
  width: 8px;
  height: 8px;
  border-radius: 1px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

a.logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  align-items: center;
  justify-content: flex-end;
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-soft);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, transform 0.2s var(--ease-spring);
}

.nav-pill:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--stroke);
}

.nav-pill:active { transform: scale(0.97); }

/* —— Buttons —— */
.btn {
  --btn-bg: var(--accent);
  --btn-fg: #04120a;
  --btn-shadow: 0 0 0 1px rgba(62, 207, 142, 0.35), var(--shadow-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.88rem 1.55rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: var(--btn-shadow);
  transition: transform 0.28s var(--ease-spring), box-shadow 0.28s var(--ease-out), background 0.2s ease, filter 0.2s ease;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.22) 0%, transparent 45%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
  border-radius: inherit;
}

.btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
  box-shadow: 0 0 0 1px rgba(62, 207, 142, 0.45), var(--shadow-lg);
}

.btn:hover::after { opacity: 1; }

.btn:active {
  transform: translateY(0) scale(0.98);
  transition-duration: 0.08s;
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn--accent {
  --btn-bg: var(--accent);
  --btn-fg: #04120a;
}

.btn--accent:hover { --btn-bg: var(--accent-hover); }

.btn--ghost {
  --btn-bg: rgba(255, 255, 255, 0.06);
  --btn-fg: var(--text);
  --btn-shadow: none;
  border: 1px solid var(--stroke-strong);
  backdrop-filter: blur(8px);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.14);
}

.btn--outline {
  --btn-bg: transparent;
  --btn-fg: var(--text-soft);
  --btn-shadow: none;
  border: 1px solid var(--stroke-strong);
}

.btn--outline:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(62, 207, 142, 0.12);
}

.btn .arrow {
  display: inline-block;
  transition: transform 0.3s var(--ease-spring);
  font-weight: 700;
}

.btn:hover .arrow { transform: translateX(4px); }

/* —— Hero —— */
.hero-visual {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
  padding: clamp(2rem, 6vw, 3.5rem) 0 clamp(2.5rem, 8vw, 4.5rem);
}

@media (min-width: 900px) {
  .hero-visual {
    grid-template-columns: 1fr min(38%, 400px);
    gap: 3rem;
    align-items: center;
  }
}

.hero-copy { min-width: 0; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.38rem 0.85rem;
  margin-bottom: 1.35rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-soft);
  background: var(--bg-card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-pill);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  animation: pulse-dot 2.2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.65; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-badge .dot { animation: none; }
}

.hero h1 {
  margin: 0 0 1.15rem;
  font-family: var(--font);
  font-size: clamp(2.15rem, 5.5vw, 3.35rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero h1 .hl {
  color: var(--accent);
  text-shadow: 0 0 40px var(--accent-dim);
}

.hero-lead {
  max-width: 36rem;
  margin: 0 0 0.85rem;
  font-size: 1.07rem;
  color: var(--text-soft);
}

.hero-legal {
  max-width: 40rem;
  margin: 0 0 1.75rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 2.25rem;
}

/* Sparkline panel */
.spark-panel {
  background: var(--bg-card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-card);
  padding: 1.1rem 1.15rem;
  box-shadow: var(--shadow-sm), var(--shadow-md);
}

.spark-panel-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.75rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.spark-panel-top .pair {
  color: var(--text);
  font-weight: 600;
}

.spark-panel-top .pct {
  color: var(--accent);
  font-weight: 600;
}

.spark-panel svg {
  display: block;
  width: 100%;
  height: auto;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.meta-card {
  padding: 1.05rem 1.1rem;
  background: var(--bg-card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-card);
  transition: transform 0.35s var(--ease-out), border-color 0.25s ease, box-shadow 0.35s var(--ease-out);
}

.meta-card:hover {
  transform: translateY(-3px);
  border-color: rgba(62, 207, 142, 0.25);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.meta-card .k {
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.meta-card .v {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  word-break: break-word;
}

.meta-card a {
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.meta-card a:hover { border-bottom-color: var(--accent); }

@media (max-width: 720px) {
  .meta-grid { grid-template-columns: 1fr; }
}

section.block {
  padding: clamp(2.5rem, 7vw, 3.75rem) 0;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.45rem;
}

.section-title {
  margin: 0 0 1.75rem;
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
}

.card {
  padding: 1.65rem 1.45rem;
  background: var(--bg-elevated);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-card);
  transition: transform 0.4s var(--ease-out), border-color 0.3s ease, box-shadow 0.4s var(--ease-out);
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(62, 207, 142, 0.2);
  box-shadow: var(--shadow-lg);
}

@media (prefers-reduced-motion: reduce) {
  .card:hover { transform: none; }
}

.card .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  margin-bottom: 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 4px;
}

.card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-soft);
  line-height: 1.55;
}

.card code {
  font-family: var(--mono);
  font-size: 0.82em;
  padding: 0.1em 0.32em;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--stroke);
  border-radius: 4px;
  color: var(--accent);
}

.price-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.85rem 1.85rem;
  background: linear-gradient(165deg, var(--bg-elevated) 0%, rgba(62, 207, 142, 0.06) 100%);
  border: 1px solid var(--stroke);
  border-radius: calc(var(--radius-card) + 0.15rem);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.price-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-hover), transparent);
  opacity: 0.95;
}

.price-panel p {
  margin: 0;
  font-size: 1rem;
  color: var(--text-soft);
  max-width: 34rem;
}

.price-panel strong {
  display: block;
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 0.3rem;
}

footer {
  padding: 2.25rem 0 2.5rem;
  border-top: 1px solid var(--stroke);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  color: var(--text-muted);
}

.foot a {
  font-weight: 500;
  color: var(--text-soft);
  padding: 0.35rem 0.55rem;
  margin: -0.35rem -0.55rem;
  border-radius: 6px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.68rem;
  transition: color 0.2s ease, background 0.2s ease;
}

.foot a:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.reveal {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* —— Legal pages —— */
.legal-header {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--stroke);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.legal-header a {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.legal-header a:hover { text-decoration: underline; text-underline-offset: 3px; }

.legal-doc {
  max-width: 40rem;
  padding: 2.5rem 0 3.5rem;
}

.legal-doc h1 {
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.legal-doc > p {
  color: var(--text-soft);
  margin: 0 0 1rem;
}

.legal-doc ul {
  margin: 0 0 1.25rem;
  padding-left: 1.15rem;
  color: var(--text-soft);
}

.legal-doc li { margin: 0.4rem 0; }

.legal-doc strong { color: var(--text); }

.legal-back {
  display: inline-block;
  margin-top: 1.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.legal-back:hover { text-decoration: underline; text-underline-offset: 3px; }