:root {
  --font-display: 'Cabinet Grotesk', 'Arial', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
  --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(3.2rem, 1.1rem + 6vw, 7.8rem);
  --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;
  --radius-sm: 0.45rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.1rem;
  --radius-xl: 1.6rem;
  --color-bg: #050506;
  --color-surface: #0b0b10;
  --color-surface-2: #111119;
  --color-surface-3: #171720;
  --color-text: #f6f2eb;
  --color-muted: #b6afa4;
  --color-faint: #776f66;
  --color-line: rgba(255, 255, 255, 0.13);
  --color-line-strong: rgba(255, 255, 255, 0.22);
  --color-primary: #ff8a1f;
  --color-primary-2: #ffc05f;
  --color-primary-dark: #9b3f00;
  --color-success: #7bdcb5;
  --shadow-lg: 0 24px 70px rgba(0, 0, 0, 0.45);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --content-wide: 1180px;
  --content-default: 960px;
}

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

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(circle at 70% 0%, rgba(255, 138, 31, 0.13), transparent 32rem),
    radial-gradient(circle at 10% 20%, rgba(255, 192, 95, 0.08), transparent 26rem),
    var(--color-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img,
video,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
  border: 0;
  background: none;
}

a,
button,
summary {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive),
    opacity var(--transition-interactive);
}

:focus-visible {
  outline: 2px solid var(--color-primary-2);
  outline-offset: 4px;
}

::selection {
  color: #090704;
  background: var(--color-primary-2);
}

.sr-only,
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  z-index: 1000;
  top: var(--space-4);
  left: var(--space-4);
  width: auto;
  height: auto;
  padding: var(--space-3) var(--space-4);
  clip: auto;
  border-radius: var(--radius-sm);
  color: #060606;
  background: var(--color-primary-2);
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 5, 6, 0.78);
  backdrop-filter: blur(18px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - var(--space-8), var(--content-wide));
  min-height: 76px;
  margin-inline: auto;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: 0.06em;
}

.brand img {
  border-radius: 50%;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

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

.nav-cta {
  padding: var(--space-3) var(--space-5);
  border: 1px solid rgba(255, 138, 31, 0.42);
  border-radius: var(--radius-full, 999px);
  color: var(--color-text) !important;
  background: rgba(255, 138, 31, 0.12);
}

.nav-toggle {
  display: none;
}

.hero {
  width: min(100% - var(--space-8), 1320px);
  margin-inline: auto;
  padding: clamp(var(--space-12), 9vw, var(--space-24)) 0 var(--space-16);
}

.hero-grid,
.section-grid,
.demo,
.founder {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(var(--space-8), 6vw, var(--space-20));
  align-items: center;
}

.hero-copy {
  display: grid;
  gap: var(--space-6);
}

.eyebrow,
.section-kicker,
.layer-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary-2);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  line-height: 1.02;
  text-wrap: balance;
}

h1 {
  max-width: 8.2ch;
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.07em;
}

h2 {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.045em;
}

h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  max-width: 68ch;
  color: var(--color-muted);
  text-wrap: pretty;
}

.hero-lede {
  max-width: 55ch;
  font-size: var(--text-lg);
  color: #ddd5ca;
}

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

.hero-actions.center {
  justify-content: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: var(--space-3) var(--space-6);
  border-radius: 999px;
  font-size: var(--text-sm);
  font-weight: 700;
}

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

.button.primary {
  color: #140b04;
  background: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(255, 192, 95, 0.32), 0 18px 46px rgba(255, 138, 31, 0.22);
}

.button.primary:hover {
  background: var(--color-primary-2);
}

.button.secondary {
  border: 1px solid var(--color-line-strong);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
}

.hero-proof {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.hero-proof div,
.metric-grid article,
.founder-facts article {
  padding: var(--space-4);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.045);
}

.hero-proof dt,
.metric-grid strong,
.founder-facts strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: 1;
  letter-spacing: -0.04em;
}

.hero-proof dd,
.metric-grid span,
.founder-facts span {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-muted);
}

.hero-visual {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: clamp(1.4rem, 4vw, 2.8rem);
  background: #0a0a0c;
  box-shadow: var(--shadow-lg);
}

.hero-visual::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  content: '';
  background: linear-gradient(180deg, transparent 45%, rgba(0, 0, 0, 0.64));
  pointer-events: none;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  min-height: 520px;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.glass-card {
  position: absolute;
  z-index: 2;
  right: var(--space-6);
  bottom: var(--space-6);
  display: flex;
  align-items: center;
  max-width: 330px;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-lg);
  background: rgba(4, 4, 5, 0.74);
  backdrop-filter: blur(14px);
}

.glass-card p {
  color: var(--color-text);
  font-size: var(--text-sm);
}

.pulse-dot {
  flex: 0 0 12px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 8px rgba(255, 138, 31, 0.12);
}

.section-pad {
  width: min(100% - var(--space-8), var(--content-wide));
  margin-inline: auto;
  padding-block: clamp(var(--space-16), 9vw, var(--space-28, 7rem));
}

.answer-block {
  width: min(100% - var(--space-8), var(--content-default));
  margin: 0 auto var(--space-12);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
  border: 1px solid rgba(255, 138, 31, 0.32);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(255, 138, 31, 0.12), rgba(255, 255, 255, 0.04));
}

.answer-block p {
  margin-top: var(--space-3);
  max-width: none;
  font-size: var(--text-lg);
  color: var(--color-text);
}

.problem-list {
  display: grid;
  gap: var(--space-4);
}

.problem-list article {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  padding: var(--space-5);
  border-top: 1px solid var(--color-line);
}

.problem-list span {
  color: var(--color-primary-2);
  font-size: var(--text-xs);
  font-weight: 700;
}

.problem-list p {
  grid-column: 2;
  margin-top: calc(-1 * var(--space-2));
}

.section-heading {
  display: grid;
  gap: var(--space-4);
  max-width: 760px;
  margin-bottom: var(--space-10);
}

.section-heading.narrow {
  max-width: 690px;
}

.layer-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-5);
}

.layer-card {
  display: grid;
  gap: var(--space-4);
  padding: clamp(var(--space-6), 4vw, var(--space-8));
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025));
}

.layer-card.large {
  grid-row: span 2;
  min-height: 520px;
  align-content: end;
  background:
    linear-gradient(180deg, transparent 22%, rgba(0, 0, 0, 0.9)),
    url('assets/iva-bom-branded.webp') center / cover;
}

.layer-card ul {
  display: grid;
  gap: var(--space-2);
  padding-left: 1.2rem;
  color: var(--color-muted);
}

.demo {
  align-items: stretch;
}

.demo-copy,
.demo-media {
  display: grid;
  align-content: center;
  gap: var(--space-5);
}

.demo-steps {
  display: grid;
  gap: var(--space-3);
}

.demo-steps div {
  padding: var(--space-4);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.035);
}

.demo-steps span {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--color-primary-2);
  font-weight: 800;
}

.demo-media video {
  width: 100%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
}

.visual-proof {
  width: min(100% - var(--space-8), 1500px);
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
}

.visual-proof img {
  width: 100%;
}

.use-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.use-grid article {
  min-height: 230px;
  padding: var(--space-6);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
}

.use-grid article.wide {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(255, 138, 31, 0.1), rgba(255, 255, 255, 0.035));
}

.use-grid h3,
.use-grid p {
  margin-bottom: var(--space-3);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.metric-grid article {
  padding: var(--space-6);
}

.metric-grid strong {
  font-size: var(--text-2xl);
  color: var(--color-primary-2);
}

.source-note {
  margin-top: var(--space-6);
  max-width: 80ch;
  font-size: var(--text-xs);
  color: var(--color-faint);
}

.source-note a {
  color: var(--color-muted);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.source-note a:hover {
  color: var(--color-primary-2);
}

.comparison-table {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
}

.comparison-table > div {
  display: grid;
  grid-template-columns: 1fr 1.1fr 1fr;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-line);
}

.comparison-table > div:last-child {
  border-bottom: 0;
}

.comparison-table .table-head {
  color: var(--color-primary-2);
  font-size: var(--text-sm);
  font-weight: 800;
  background: rgba(255, 255, 255, 0.055);
}

.comparison-table span,
.comparison-table strong {
  min-width: 0;
}

.comparison-table strong {
  color: var(--color-text);
}

.trust-card {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--space-8);
  padding: clamp(var(--space-6), 5vw, var(--space-12));
  border: 1px solid rgba(255, 138, 31, 0.22);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 0 0, rgba(255, 138, 31, 0.18), transparent 30rem),
    rgba(255, 255, 255, 0.04);
}

.trust-list {
  display: grid;
  gap: var(--space-4);
}

.trust-list p {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-line);
}

.trust-list p:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.founder-facts {
  display: grid;
  gap: var(--space-4);
}

.founder-facts article {
  padding: var(--space-6);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  list-style: none;
  counter-reset: step;
}

.timeline li {
  position: relative;
  min-height: 290px;
  padding: var(--space-6);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-2);
}

.timeline li::before {
  counter-increment: step;
  content: '0' counter(step);
  display: inline-flex;
  margin-bottom: var(--space-8);
  color: var(--color-primary-2);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
}

.timeline span {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-faint);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.timeline h3 {
  margin-bottom: var(--space-3);
}

.faq-list {
  display: grid;
  gap: var(--space-3);
}

details {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.035);
}

summary {
  min-height: 64px;
  padding: var(--space-5) var(--space-6);
  color: var(--color-text);
  font-weight: 800;
  cursor: pointer;
}

details p {
  max-width: 86ch;
  padding: 0 var(--space-6) var(--space-6);
}

details a {
  color: var(--color-primary-2);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.final-cta {
  width: min(100% - var(--space-8), 980px);
  margin: var(--space-8) auto var(--space-20);
  padding: clamp(var(--space-8), 7vw, var(--space-16));
  text-align: center;
  border: 1px solid rgba(255, 138, 31, 0.32);
  border-radius: clamp(1.4rem, 5vw, 3rem);
  background:
    radial-gradient(circle at 50% 0, rgba(255, 138, 31, 0.22), transparent 24rem),
    rgba(255, 255, 255, 0.045);
}

.final-cta img {
  margin: 0 auto var(--space-5);
  border-radius: 50%;
}

.final-cta h2,
.final-cta p {
  margin-inline: auto;
}

.final-cta p {
  margin-block: var(--space-4) var(--space-6);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-8);
  width: min(100% - var(--space-8), var(--content-wide));
  margin-inline: auto;
  padding: var(--space-10) 0;
  border-top: 1px solid var(--color-line);
}

.footer-brand {
  margin-bottom: var(--space-3);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  align-items: start;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

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

@media (max-width: 980px) {
  .hero-grid,
  .section-grid,
  .demo,
  .founder,
  .trust-card {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 9ch;
  }

  .layer-grid,
  .use-grid,
  .timeline {
    grid-template-columns: 1fr 1fr;
  }

  .layer-card.large {
    grid-row: auto;
    grid-column: span 2;
  }

  .use-grid article.wide {
    grid-column: span 1;
  }
}

@media (max-width: 760px) {
  .nav-shell {
    width: min(100% - var(--space-6), var(--content-wide));
    min-height: 66px;
  }

  .nav-toggle {
    display: grid;
    gap: 5px;
    width: 44px;
    height: 44px;
    place-content: center;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
  }

  .nav-toggle span:not(.sr-only) {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 99px;
    background: var(--color-text);
  }

  .nav-menu {
    position: absolute;
    top: 66px;
    right: var(--space-3);
    left: var(--space-3);
    display: none;
    align-items: stretch;
    padding: var(--space-4);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    background: rgba(8, 8, 10, 0.96);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.is-open {
    display: grid;
  }

  .nav-menu a {
    padding: var(--space-3);
  }

  .hero,
  .section-pad,
  .visual-proof,
  .answer-block,
  .final-cta,
  .site-footer {
    width: min(100% - var(--space-6), var(--content-wide));
  }

  .hero {
    padding-top: var(--space-10);
  }

  h1 {
    font-size: clamp(3rem, 18vw, 5.5rem);
  }

  .hero-proof,
  .metric-grid,
  .layer-grid,
  .use-grid,
  .timeline,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .layer-card.large {
    grid-column: auto;
    min-height: 440px;
  }

  .hero-visual,
  .hero-visual img {
    min-height: 420px;
  }

  .comparison-table {
    overflow-x: auto;
  }

  .comparison-table > div {
    min-width: 700px;
  }

  .problem-list article {
    grid-template-columns: 1fr;
  }

  .problem-list p {
    grid-column: auto;
  }

  .footer-links {
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}