/* ═══════════════════════════════════════════════════════════
   SigmaEdge — Design Tokens & Component Styles
   Dark fintech aesthetic · Teal accent · Satoshi + Instrument Serif
   ═══════════════════════════════════════════════════════════ */

/* ─── TOKENS ─── */
:root {
  /* Type scale (fluid) */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-body:    'Satoshi', 'Inter', sans-serif;
  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-mono:    'Space Mono', 'Courier New', monospace;

  /* Surfaces (deep dark) */
  --color-bg:       #06080D;
  --color-bg-2:     #0C1019;
  --color-bg-3:     #121620;
  --color-surface:  #161B28;
  --color-surface-2:#1C2233;

  /* Borders & dividers */
  --color-border:  oklch(0.9 0 0 / 0.06);
  --color-border-hover: oklch(0.9 0 0 / 0.12);

  /* Text */
  --color-text:       #E8ECF4;
  --color-text-muted: #8D95A8;
  --color-text-faint: #4E5668;

  /* Accent (Teal) */
  --color-accent:       #00D4AA;
  --color-accent-hover: #00E6B8;
  --color-accent-dim:   oklch(from #00D4AA l c h / 0.12);

  /* Semantic */
  --color-blue:   #3B82F6;
  --color-amber:  #F59E0B;
  --color-red:    #EF4444;
  --color-purple: #A855F7;
  --color-green:  #22C55E;

  /* Radius */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.25rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 12px 40px oklch(0 0 0 / 0.5);

  /* Content widths */
  --content-max: 1200px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-mono] { font-family: var(--font-mono); }

/* ─── CONTAINER ─── */
.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-inline: var(--space-10);
}

@media (max-width: 768px) {
  .container { padding-inline: var(--space-5); }
}

/* ─── SECTIONS ─── */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}
.section--alt {
  background: var(--color-bg-2);
}
.section--compact {
  padding-block: clamp(var(--space-8), 4vw, var(--space-16));
}

.section-header { margin-bottom: var(--space-12); }
.section-header--left { text-align: left; }

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-4);
  display: block;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.section-title em {
  font-style: italic;
  color: var(--color-accent);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 560px;
}

/* ─── NAV ─── */
.nav-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-10);
  height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.logo-icon { color: var(--color-text); flex-shrink: 0; }
.logo-text {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
  color: var(--color-text);
}
.logo-accent { color: var(--color-accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav-links a:not(.btn-primary) {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}
.nav-links a:not(.btn-primary):hover {
  color: var(--color-text);
}

.mobile-menu-btn { display: none; color: var(--color-text-muted); }

@media (max-width: 768px) {
  .nav { padding: 0 var(--space-5); }
  .nav-links a:not(.btn-primary) { display: none; }
  .mobile-menu-btn { display: flex; }
}

/* ─── BUTTONS ─── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-md);
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 600;
  font-size: var(--text-sm);
  border: none;
  cursor: pointer;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px oklch(from var(--color-accent) l c h / 0.2);
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.875rem 2rem;
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: var(--text-base);
  border: 1px solid var(--color-border-hover);
  cursor: pointer;
}
.btn-ghost:hover {
  color: var(--color-text);
  border-color: oklch(0.9 0 0 / 0.2);
}

/* ─── HERO ─── */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 7rem var(--space-10) var(--space-16);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, oklch(from var(--color-accent) l c h / 0.06), transparent 70%),
    radial-gradient(ellipse 50% 40% at 75% 15%, oklch(from var(--color-blue) l c h / 0.04), transparent 60%);
  pointer-events: none;
}
.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(oklch(0.9 0 0 / 0.02) 1px, transparent 1px),
    linear-gradient(90deg, oklch(0.9 0 0 / 0.02) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 30%, black, transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: left;
  max-width: 720px;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.375rem 1rem;
  border-radius: 100px;
  background: var(--color-accent-dim);
  border: 1px solid oklch(from var(--color-accent) l c h / 0.15);
  font-size: var(--text-xs);
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: var(--space-8);
}
.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}
.hero h1 em {
  font-style: italic;
  color: var(--color-accent);
}

.hero-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 540px;
  margin-bottom: var(--space-10);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-metrics {
  position: relative;
  display: flex;
  gap: var(--space-12);
  margin-top: var(--space-16);
  padding-top: var(--space-10);
  border-top: 1px solid var(--color-border);
  width: 100%;
  max-width: 720px;
}
.hero-metric {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.metric-value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}
.metric-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (max-width: 768px) {
  .hero { padding: 6rem var(--space-5) var(--space-12); min-height: auto; }
  .hero-metrics { flex-wrap: wrap; gap: var(--space-8); }
  .hero-metric { min-width: 40%; }
}

/* ─── TICKER ─── */
@keyframes tickerScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-100%); }
}

.ticker-wrap {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 0.875rem 0;
  overflow: hidden;
  background: var(--color-bg-2);
}
.ticker-track {
  display: flex;
  width: max-content;
}
.ticker-items {
  display: flex;
  gap: var(--space-12);
  padding-right: var(--space-12);
  animation: tickerScroll 35s linear infinite;
}
.ticker-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  white-space: nowrap;
}
.t-pair { color: var(--color-text-faint); }
.t-price { color: var(--color-text-muted); }
.t-change { font-weight: 600; }
.t-change.up { color: var(--color-accent); }
.t-change.down { color: var(--color-red); }

/* ─── STRATEGIES ─── */
.strategies-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
/* First card (Cross-Chain Arb) spans 2 cols */
.strat-card--wide {
  grid-column: span 2;
}

.strat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color 300ms var(--ease-out), box-shadow 300ms var(--ease-out), transform 300ms var(--ease-out);
}
.strat-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.strat-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.strat-card__header h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.strat-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.strat-tag--teal   { background: oklch(from var(--color-accent) l c h / 0.12); color: var(--color-accent); }
.strat-tag--blue   { background: oklch(from var(--color-blue) l c h / 0.12);   color: var(--color-blue); }
.strat-tag--amber  { background: oklch(from var(--color-amber) l c h / 0.12);  color: var(--color-amber); }
.strat-tag--purple { background: oklch(from var(--color-purple) l c h / 0.12); color: var(--color-purple); }
.strat-tag--red    { background: oklch(from var(--color-red) l c h / 0.12);    color: var(--color-red); }
.strat-tag--green  { background: oklch(from var(--color-green) l c h / 0.12);  color: var(--color-green); }

.strat-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.strat-metrics {
  display: flex;
  gap: var(--space-6);
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.strat-metric { display: flex; flex-direction: column; gap: 2px; }
.strat-metric__val {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.strat-metric__label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (max-width: 900px) {
  .strategies-grid { grid-template-columns: 1fr; }
  .strat-card--wide { grid-column: span 1; }
}

/* ─── CHAINS ─── */
.chains-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-12);
  align-items: center;
}
.chains-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
.chain-pill {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: border-color 180ms var(--ease-out), color 180ms var(--ease-out), transform 180ms var(--ease-out);
}
.chain-pill:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text);
  transform: translateY(-1px);
}
.chain-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .chains-layout { grid-template-columns: 1fr; }
  .chains-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ─── PERFORMANCE ─── */
.perf-chart {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  overflow: hidden;
}
.perf-chart__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
}
.perf-chart__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.perf-chart__badge {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  background: var(--color-accent-dim);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
}
.perf-chart__area {
  height: 200px;
  position: relative;
}
.perf-chart__area svg {
  width: 100%;
  height: 100%;
}

.perf-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
.perf-stat {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.perf-stat__val {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.perf-stat__val--accent { color: var(--color-accent); }
.perf-stat__val--blue   { color: var(--color-blue); }
.perf-stat__val--amber  { color: var(--color-amber); }

.perf-stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (max-width: 768px) {
  .perf-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ─── DIFFERENTIATOR ─── */
.diff-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-16);
  align-items: start;
}

.diff-quote {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  border: none;
  padding: 0;
}
.diff-quote em {
  font-style: normal;
  color: var(--color-accent);
}

.diff-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.diff-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.diff-feat {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 180ms var(--ease-out);
}
.diff-feat:hover {
  border-color: var(--color-border-hover);
}
.diff-feat__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  min-width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-dim);
  border-radius: var(--radius-md);
  font-weight: 700;
  flex-shrink: 0;
}
.diff-feat h3 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.diff-feat p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .diff-layout { grid-template-columns: 1fr; gap: var(--space-10); }
}

/* ─── INFRASTRUCTURE ─── */
.infra-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.infra-cell {
  background: var(--color-bg-2);
  padding: var(--space-8);
  transition: background 200ms var(--ease-out);
}
.infra-cell:hover {
  background: var(--color-surface);
}
.infra-cell h3 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.infra-cell p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.55;
}

@media (max-width: 768px) {
  .infra-grid { grid-template-columns: 1fr; }
}

/* ─── CTA ─── */
.section--cta {
  text-align: center;
  position: relative;
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
}
.cta-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 500px;
  height: 250px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse, oklch(from var(--color-accent) l c h / 0.06), transparent 70%);
  pointer-events: none;
}
.cta-content {
  position: relative;
}
.cta-content .section-label { text-align: center; }
.cta-content .section-title { text-align: center; margin-inline: auto; }
.cta-content .section-desc { text-align: center; margin-inline: auto; margin-bottom: var(--space-10); }
.cta-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── FOOTER ─── */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-10);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-links {
  display: flex;
  gap: var(--space-6);
}
.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-links a:hover {
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .footer-inner { flex-direction: column; gap: var(--space-5); text-align: center; }
}

/* ─── SCROLL ANIMATIONS ─── */
.fade-in { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: revealFade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}

@keyframes revealFade {
  to { opacity: 1; }
}

/* Fallback: simple load animation for hero elements */
.hero .fade-in {
  opacity: 0;
  animation: heroFadeIn 0.8s var(--ease-out) forwards;
}
.hero .fade-in:nth-child(1) { animation-delay: 0s; }
.hero .fade-in:nth-child(2) { animation-delay: 0.1s; }
.hero .fade-in:nth-child(3) { animation-delay: 0.2s; }
.hero .fade-in:nth-child(4) { animation-delay: 0.3s; }

@keyframes heroFadeIn {
  from { opacity: 0; filter: blur(4px); }
  to { opacity: 1; filter: blur(0); }
}

/* Mobile nav */
@media (max-width: 768px) {
  .nav-links .btn-primary { font-size: var(--text-xs); padding: 0.5rem 1rem; }
}