:root {
  --bg: #050506;
  --grid-line: rgba(255, 255, 255, 0.04);
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --muted2: #71717a;
  --panel: rgba(24, 24, 27, 0.72);
  --panel2: rgba(18, 18, 21, 0.95);
  --border: rgba(255, 255, 255, 0.1);
  --green: #7cff6b;
  --green-dim: #5bd94d;
  --green-glow: rgba(124, 255, 107, 0.35);
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --content: 1200px;
  --narrow: 640px;
  --nav-h: 64px;
  --radius: 10px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 55% at 50% -10%, #000 25%, transparent 70%);
}

a {
  color: var(--green);
}

a:hover {
  color: #9eff90;
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 200;
  padding: 0.6rem 1rem;
  background: #111;
  color: var(--text);
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.top-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  border-bottom: 1px solid var(--border);
  background: rgba(5, 5, 6, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.top-nav-inner {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

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

.top-nav-links {
  display: none;
  align-items: center;
  gap: 1.35rem;
  flex: 1;
  justify-content: center;
}

@media (min-width: 900px) {
  .top-nav-links {
    display: flex;
  }
}

.top-nav-links a {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: opacity 0.15s ease, border-color 0.15s ease, background 0.15s ease, transform 0.12s ease;
}

.btn:hover {
  opacity: 0.95;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 1rem 1.5rem;
  font-size: 0.9375rem;
}

.btn-solid {
  background: var(--green);
  color: #0a0a0a;
  border-color: var(--green);
}

.btn-solid:hover {
  color: #0a0a0a;
}

.btn-outline {
  background: transparent;
  color: var(--green);
  border-color: rgba(124, 255, 107, 0.45);
}

.btn-outline:hover {
  color: var(--green);
  background: rgba(124, 255, 107, 0.08);
  border-color: var(--green);
}

main {
  position: relative;
  z-index: 1;
  max-width: var(--content);
  margin: 0 auto;
  padding: clamp(2.75rem, 6vw, 4rem) clamp(1.25rem, 4vw, 2rem) clamp(3rem, 6vw, 5rem);
}

/* Hero */
.hero {
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
}

.hero-kicker {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
}

.hero-title {
  margin: 0 0 1.5rem;
  font-weight: 800;
  font-size: clamp(2.35rem, 6vw, 3.65rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  max-width: min(100%, 22rem);
}

@media (min-width: 720px) {
  .hero-title {
    max-width: min(100%, 28rem);
  }
}

.hero-title-accent {
  color: var(--green);
}

.hero-lead {
  margin: 0 0 1.25rem;
  font-size: clamp(1.125rem, 2.1vw, 1.35rem);
  line-height: 1.55;
  color: #d4d4d8;
  max-width: 36rem;
}

.hero-lead strong {
  color: var(--text);
  font-weight: 700;
}

.hero-stat-inline {
  margin: 0 0 2rem;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--muted);
  max-width: 34rem;
}

.hero-stat-inline strong {
  color: var(--green);
  font-weight: 800;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Problem band */
.band {
  margin: 0 calc(-1 * clamp(1.25rem, 4vw, 2rem));
  padding: clamp(3rem, 7vw, 5.5rem) clamp(1.25rem, 4vw, 2rem);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(124, 255, 107, 0.04) 0%, transparent 55%);
}

.band-inner {
  max-width: var(--content);
  margin: 0 auto;
}

.band-lead {
  margin: 0 0 2rem;
  font-size: clamp(1.125rem, 2vw, 1.3rem);
  line-height: 1.55;
  color: #d4d4d8;
  max-width: 44rem;
}

.band-lead-tight {
  margin-bottom: 1.75rem;
}

/* Section titles: label + display heading */
.section-intro {
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
  max-width: 44rem;
}

.section-intro-wide {
  max-width: 48rem;
}

.section-label {
  margin: 0 0 0.65rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
}

.section-heading {
  margin: 0;
  font-size: clamp(1.85rem, 4.2vw, 2.85rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text);
}

.subsection-title {
  margin: 0 0 1.25rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #e4e4e7;
}

.subsection-title-spaced {
  margin-top: 0.5rem;
  margin-bottom: 1.5rem;
}

.problem-list {
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: 46rem;
}

.problem-list li {
  position: relative;
  margin-bottom: 1.1rem;
  padding-left: 1.35rem;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--muted);
}

.problem-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px var(--green-glow);
}

.problem-list li:last-child {
  margin-bottom: 0;
}

/* Section blocks */
.section-block {
  padding: clamp(3.25rem, 8vw, 5.5rem) 0;
  border-top: 1px solid var(--border);
}

.section-deck {
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  font-size: clamp(1.0625rem, 1.8vw, 1.2rem);
  line-height: 1.65;
  color: var(--muted);
  max-width: 44rem;
}

.section-deck strong {
  color: #e4e4e7;
  font-weight: 600;
}

.card-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.feature-card {
  padding: clamp(1.5rem, 3vw, 2rem);
  border-radius: calc(var(--radius) + 2px);
  border: 1px solid var(--border);
  background: var(--panel);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  border-color: rgba(124, 255, 107, 0.25);
  box-shadow: 0 0 0 1px rgba(124, 255, 107, 0.06);
}

.feature-card-title {
  margin: 0 0 0.65rem;
  font-size: 1.1875rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.feature-card-text {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--muted);
}

.under-hood {
  margin-top: clamp(3rem, 6vw, 4.5rem);
  padding-top: clamp(2.5rem, 5vw, 3.5rem);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.under-hood .subsection-title {
  margin-bottom: 0.75rem;
}

.under-hood-lead {
  margin: 0 0 2rem;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--muted2);
  max-width: 36rem;
}

/* How it works — dedicated band */
.section-how {
  padding-bottom: clamp(3.5rem, 8vw, 6rem);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, transparent 35%);
  border-radius: 0;
  margin-inline: calc(-1 * clamp(1.25rem, 4vw, 2rem));
  padding-inline: clamp(1.25rem, 4vw, 2rem);
  border-left: 1px solid transparent;
  border-right: 1px solid transparent;
  box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.06);
}

.section-how-header {
  margin-bottom: clamp(2.25rem, 5vw, 3.5rem);
  max-width: 48rem;
}

.section-how-lead {
  margin: clamp(1rem, 2.5vw, 1.35rem) 0 0;
  font-size: clamp(1.0625rem, 2vw, 1.2rem);
  line-height: 1.6;
  color: var(--muted);
  max-width: 42rem;
}

.how-diagram-wrap {
  margin-bottom: clamp(2.5rem, 5vw, 3.75rem);
}

.how-block-label {
  margin: 0 0 1rem;
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted2);
}

.how-steps-title {
  margin: 0 0 clamp(1.5rem, 3vw, 2rem);
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* Flow + steps */
.flow-figure {
  margin: 0;
}

.flow-figure-prominent img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: #080809;
  box-shadow:
    0 0 0 1px rgba(124, 255, 107, 0.06),
    0 24px 64px rgba(0, 0, 0, 0.45);
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 2.5vw, 1.75rem);
  width: 100%;
}

.steps-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(1rem, 2vw, 1.5rem);
  align-items: start;
  padding: clamp(1.35rem, 3vw, 2rem) clamp(1.35rem, 3vw, 2.25rem);
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(14, 14, 18, 0.75);
  width: 100%;
  max-width: 100%;
}

@media (min-width: 720px) {
  .steps-zigzag .steps-item:nth-child(odd) {
    margin-inline-end: auto;
    max-width: min(100%, 46rem);
  }

  .steps-zigzag .steps-item:nth-child(even) {
    margin-inline-start: auto;
    max-width: min(100%, 46rem);
  }
}

.steps-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 12px;
  font-size: 1.0625rem;
  font-weight: 800;
  color: #0a0a0a;
  background: var(--green);
  box-shadow: 0 0 20px var(--green-glow);
  flex-shrink: 0;
}

.steps-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 1.0625rem;
  color: var(--muted);
  line-height: 1.6;
}

.steps-body strong {
  display: block;
  color: var(--text);
  font-weight: 700;
  font-size: 1.1875rem;
  letter-spacing: -0.02em;
}

/* Divider after How it works, before CTA */
.page-rail-divider {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin: clamp(2.5rem, 6vw, 4rem) 0 0;
  padding: clamp(2rem, 5vw, 3rem) 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.page-rail-divider-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(124, 255, 107, 0.35), transparent);
}

.page-rail-divider-mark {
  flex-shrink: 0;
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted2);
}

/* Integrity cards */
.integrity-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 900px) {
  .integrity-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.integrity-card {
  display: flex;
  flex-direction: column;
  padding: clamp(1.5rem, 3vw, 1.85rem);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  background: var(--panel2);
  min-height: 100%;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.integrity-card:hover {
  border-color: rgba(124, 255, 107, 0.28);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

.integrity-icon {
  color: var(--green);
  margin-bottom: 0.85rem;
}

.integrity-icon svg {
  display: block;
}

.integrity-card-title {
  margin: 0 0 0.6rem;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.integrity-card-text {
  margin: 0 0 1.1rem;
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--muted);
  flex: 1;
}

.integrity-code {
  margin: 0;
  margin-top: auto;
  padding: 0.85rem 1rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.72rem;
  line-height: 1.45;
  color: #c4e8bc;
  background: #080809;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
  white-space: pre;
}

.integrity-timelock {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.integrity-timelock-bar {
  flex: 1;
  height: 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.integrity-timelock-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--green-dim), var(--green));
  border-radius: 3px;
  box-shadow: 0 0 12px var(--green-glow);
}

.integrity-timelock-label {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.integrity-badge-wrap {
  margin: 0;
  margin-top: auto;
}

.integrity-badge {
  display: inline-block;
  padding: 0.4rem 0.65rem;
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--green);
  border: 1px solid rgba(124, 255, 107, 0.45);
  border-radius: 6px;
  background: rgba(124, 255, 107, 0.06);
}

.integrity-badge:hover {
  color: var(--green);
  border-color: var(--green);
  background: rgba(124, 255, 107, 0.12);
}

/* CTA floor */
.cta-floor {
  position: relative;
  z-index: 1;
  padding: clamp(3rem, 8vw, 4.5rem) 1.5rem;
  text-align: center;
  background: var(--green);
}

.cta-floor-inner {
  max-width: 36rem;
  margin: 0 auto;
}

.cta-floor-title {
  margin: 0 0 0.85rem;
  font-size: clamp(1.65rem, 4.5vw, 2.35rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: #0a0a0a;
}

.cta-floor-sub {
  margin: 0 auto 1.75rem;
  font-size: 1.05rem;
  line-height: 1.55;
  font-weight: 500;
  color: #1c1917;
}

.cta-floor-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 1.5rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
  color: #fafafa;
  background: #0c1a12;
  border: 1px solid #051208;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
  transition: background 0.15s ease, transform 0.12s ease;
}

.cta-floor-btn:hover {
  color: #fafafa;
  background: #132a1c;
  transform: translateY(-1px);
}

.cta-floor-btn:active {
  transform: translateY(0);
}

.page-footer {
  position: relative;
  z-index: 1;
  padding: 2rem 1.25rem 2.5rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--muted2);
  border-top: 1px solid var(--border);
}

.page-footer p {
  margin: 0;
}

.page-footer a {
  color: var(--muted);
}

.page-footer a:hover {
  color: var(--green);
}