*,
:before,
:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #05070c;
  --panel: #0d1320;
  --panel-2: #121b2c;
  --line: rgba(228, 238, 255, 0.1);
  --line-strong: rgba(0, 212, 255, 0.28);
  --text: #f4f7fb;
  --muted: #9aa8bb;
  --quiet: #6d7b8e;
  --cyan: #00d4ff;
  --blue: #3f7cff;
  --green: #66f2c2;
  --violet: #9b7cff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, Consolas, monospace;
}

html {
  background: var(--bg);
  color-scheme: dark;
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background:
    linear-gradient(180deg, rgba(0, 212, 255, 0.08), transparent 460px),
    radial-gradient(circle at 82% 8%, rgba(63, 124, 255, 0.16), transparent 280px),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

ul {
  list-style: none;
}

.skip-link {
  background: var(--cyan);
  border-radius: 8px;
  color: var(--bg);
  left: 16px;
  padding: 12px 16px;
  position: absolute;
  top: -80px;
  z-index: 200;
}

.skip-link:focus {
  top: 16px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  border-radius: 6px;
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.site-header {
  border-bottom: 1px solid transparent;
  left: 0;
  position: fixed;
  right: 0;
  top: 0;
  transition: background 0.2s ease, border-color 0.2s ease, backdrop-filter 0.2s ease;
  z-index: 100;
}

.site-header.scrolled,
.site-header.menu-open {
  backdrop-filter: blur(18px);
  background: rgba(5, 7, 12, 0.9);
  border-color: var(--line);
}

.nav-inner,
.container {
  margin: 0 auto;
  max-width: 1180px;
  padding: 0 28px;
}

.nav-inner {
  align-items: center;
  display: flex;
  gap: 28px;
  height: 76px;
  justify-content: space-between;
}

.brand {
  color: var(--text);
  font-size: 20px;
  font-weight: 750;
  letter-spacing: 0;
}

.brand span {
  color: var(--cyan);
}

.nav-links {
  align-items: center;
  display: flex;
  gap: 26px;
}

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.18s ease;
}

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

.nav-actions {
  align-items: center;
  display: flex;
  gap: 10px;
}

.menu-toggle {
  align-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  display: none;
  height: 42px;
  justify-content: center;
  width: 42px;
}

.menu-toggle span,
.menu-toggle span:before,
.menu-toggle span:after {
  background: currentColor;
  content: "";
  display: block;
  height: 2px;
  position: relative;
  transition: transform 0.18s ease, opacity 0.18s ease;
  width: 18px;
}

.menu-toggle span:before {
  position: absolute;
  top: -6px;
}

.menu-toggle span:after {
  position: absolute;
  top: 6px;
}

.menu-toggle[aria-expanded="true"] span {
  background: transparent;
}

.menu-toggle[aria-expanded="true"] span:before {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:after {
  transform: translateY(-6px) rotate(-45deg);
}

.btn {
  align-items: center;
  border-radius: 8px;
  display: inline-flex;
  font-size: 14px;
  font-weight: 650;
  justify-content: center;
  min-height: 44px;
  padding: 11px 18px;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease, transform 0.18s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--cyan);
  color: #001018;
}

.btn-primary:hover {
  background: #42ddff;
}

.btn-secondary {
  border: 1px solid var(--line);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--line-strong);
}

.eyebrow {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero {
  min-height: 92vh;
  padding: 148px 0 84px;
}

.hero-grid {
  align-items: center;
  display: grid;
  gap: 56px;
  grid-template-columns: minmax(0, 1.06fr) minmax(360px, 0.94fr);
}

.hero-copy h1,
.page-hero h1 {
  color: var(--text);
  font-size: clamp(42px, 6vw, 78px);
  font-weight: 760;
  letter-spacing: 0;
  line-height: 1.02;
  margin-top: 18px;
}

.hero-copy p,
.page-hero p,
.section-head p,
.copy p,
.card p,
.step p,
.compare-card p,
.visual-card p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.72;
}

.hero-copy > p:not(.eyebrow),
.page-hero p {
  font-size: clamp(17px, 2vw, 20px);
  margin-top: 24px;
  max-width: 720px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.trust-row {
  color: var(--quiet);
  display: flex;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 12px;
  gap: 14px;
  margin-top: 28px;
}

.system-visual {
  background: linear-gradient(145deg, rgba(18, 27, 44, 0.98), rgba(9, 14, 24, 0.98));
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.hero-image {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-image img {
  aspect-ratio: 16 / 9;
  display: block;
  height: auto;
  object-fit: cover;
  width: 100%;
}

.input-stack,
.output-stack {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, 1fr);
}

.input-stack span,
.output-stack span,
.pill {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  padding: 12px;
}

.engine {
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  margin: 18px 0;
  padding: 20px;
  text-align: center;
}

.engine strong {
  color: var(--text);
  display: block;
  font-size: 18px;
}

.engine small {
  color: var(--cyan);
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  margin-top: 8px;
  text-transform: uppercase;
}

section {
  padding: 96px 0;
}

.section-muted {
  background: rgba(13, 19, 32, 0.78);
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.section-head {
  margin-bottom: 38px;
  max-width: 760px;
}

.section-head h2,
.copy h2,
.cta h2 {
  color: var(--text);
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 740;
  letter-spacing: 0;
  line-height: 1.08;
  margin-top: 14px;
}

.section-head p,
.copy p {
  margin-top: 16px;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 18px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card,
.step,
.compare-card,
.visual-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 26px;
}

.card strong,
.step strong,
.compare-card strong,
.visual-card strong {
  color: var(--text);
  display: block;
  font-size: 18px;
  margin-bottom: 10px;
}

.number {
  color: var(--cyan);
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  margin-bottom: 16px;
}

.wedge-list {
  display: grid;
  gap: 12px;
}

.wedge-list li {
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  padding: 14px 0;
}

.wedge-list li:last-child {
  border-bottom: 0;
}

.example-panel,
.cta,
.form-panel {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(63, 124, 255, 0.08));
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 36px;
}

.example-panel {
  display: grid;
  gap: 30px;
  grid-template-columns: 1fr 1fr;
}

.flow-list {
  display: grid;
  gap: 12px;
}

.flow-list li {
  background: rgba(5, 7, 12, 0.42);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  padding: 14px 16px;
}

.compare {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr 1fr;
}

.compare-card.bad {
  border-color: rgba(255, 255, 255, 0.08);
}

.compare-card.good {
  border-color: var(--line-strong);
}

.page-hero {
  padding: 150px 0 76px;
}

.split {
  align-items: start;
  display: grid;
  gap: 54px;
  grid-template-columns: 0.9fr 1.1fr;
}

.cta {
  align-items: center;
  display: flex;
  gap: 24px;
  justify-content: space-between;
}

.cta p {
  color: var(--muted);
  line-height: 1.7;
  margin-top: 12px;
  max-width: 680px;
}

.form-grid {
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field label {
  color: var(--text);
  font-size: 14px;
  font-weight: 650;
}

.field input,
.field textarea,
.field select {
  background: rgba(5, 7, 12, 0.58);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  min-height: 46px;
  padding: 12px 14px;
}

.field textarea {
  min-height: 130px;
  resize: vertical;
}

.field-error {
  color: #ffb3b3;
  font-size: 13px;
  min-height: 18px;
}

.form-status {
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
  min-height: 48px;
  padding: 12px 14px;
}

.form-status.success {
  border-color: rgba(102, 242, 194, 0.42);
  color: var(--green);
}

.form-status.error {
  border-color: rgba(255, 179, 179, 0.42);
  color: #ffb3b3;
}

.honeypot {
  left: -9999px;
  position: absolute;
}

.selector-row,
.tabs,
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.selector-row button,
.tabs button,
.filter-row button {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  min-height: 42px;
  padding: 10px 14px;
}

.selector-row button[aria-pressed="true"],
.tabs button[aria-selected="true"],
.filter-row button[aria-pressed="true"] {
  border-color: var(--line-strong);
  color: var(--text);
}

.demo-shell {
  display: grid;
  gap: 18px;
}

.demo-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  display: grid;
  gap: 18px;
  padding: 24px;
}

.demo-output {
  display: grid;
  gap: 18px;
  grid-template-columns: 0.9fr 1.1fr;
}

.demo-list {
  display: grid;
  gap: 10px;
}

.demo-list li {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  padding: 12px 14px;
}

.demo-dashboard {
  background: linear-gradient(145deg, rgba(18, 27, 44, 0.98), rgba(5, 7, 12, 0.88));
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  display: grid;
  gap: 12px;
  padding: 18px;
}

.demo-dashboard header {
  align-items: center;
  display: flex;
  justify-content: space-between;
}

.status-pill {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 11px;
  padding: 6px 10px;
  text-transform: uppercase;
}

.dashboard-metrics {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, 1fr);
}

.dashboard-metrics div {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
}

.dashboard-metrics strong {
  color: var(--text);
  display: block;
  font-family: var(--mono);
  font-size: 22px;
}

.dashboard-metrics span {
  color: var(--quiet);
  font-size: 12px;
}

.empty-state {
  border: 1px dashed var(--line);
  border-radius: 10px;
  color: var(--quiet);
  padding: 18px;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 42px 0;
}

.footer-inner {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer a,
.footer-copy {
  color: var(--quiet);
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1040px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    background: rgba(5, 7, 12, 0.96);
    border-bottom: 1px solid var(--line);
    display: none;
    gap: 0;
    inset: 76px 0 auto;
    padding: 18px 28px 28px;
    position: fixed;
  }

  .nav-links.open {
    display: grid;
  }

  .nav-links li {
    border-bottom: 1px solid var(--line);
  }

  .nav-links li:last-child {
    border-bottom: 0;
  }

  .nav-links a {
    display: block;
    font-size: 18px;
    padding: 18px 0;
  }

  .nav-actions .btn-secondary {
    display: none;
  }

  .hero-grid,
  .split,
  .example-panel,
  .compare,
  .demo-output {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }
}

@media (max-width: 760px) {
  .nav-inner,
  .container {
    padding: 0 20px;
  }

  .nav-actions .btn-primary {
    padding-left: 12px;
    padding-right: 12px;
  }

  .hero,
  .page-hero {
    padding-top: 122px;
  }

  section {
    padding: 72px 0;
  }

  .hero-actions,
  .cta {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .btn,
  .cta .btn {
    width: 100%;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .dashboard-metrics,
  .input-stack,
  .output-stack {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  :before,
  :after {
    animation-duration: 0.001ms !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}