/* ==========================================================================
   Revametrics — Base / Reset
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
p,
figure {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  letter-spacing: -0.015em;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

address {
  font-style: normal;
}

::selection {
  background: var(--accent-500);
  color: var(--navy-950);
}

:focus-visible {
  outline: 2px solid var(--accent-500);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -60px;
  background: var(--navy-950);
  color: var(--on-dark-primary);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--duration-base) var(--ease-out);
}

.skip-link:focus {
  top: var(--space-4);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Layout primitives
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: var(--content-narrow);
}

.section {
  padding-block: var(--space-24);
}

.section--tight {
  padding-block: var(--space-16);
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--dark {
  background: linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 100%);
  color: var(--on-dark-primary);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-12);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--accent-700);
  margin-bottom: var(--space-4);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--accent-500);
  border-radius: var(--radius-full);
}

.section--dark .eyebrow {
  color: var(--accent-400);
}

.section-title {
  font-size: var(--text-3xl);
  color: var(--color-text);
  max-width: 22ch;
}

.section--dark .section-title {
  color: var(--on-dark-primary);
}

.section-lede {
  margin-top: var(--space-4);
  font-size: var(--text-md);
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: var(--leading-snug);
}

.section-head--center .section-lede {
  margin-inline: auto;
}

.section--dark .section-lede {
  color: var(--on-dark-secondary);
}

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

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  transition: transform var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--accent-500);
  color: var(--navy-950);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.25) inset;
}

.btn-primary:hover {
  background: var(--accent-400);
}

.btn-secondary {
  background: transparent;
  border-color: var(--slate-300);
  color: var(--ink-900);
}

.btn-secondary:hover {
  border-color: var(--ink-900);
  background: var(--surface-1);
}

.section--dark .btn-secondary,
.hero .btn-secondary,
.cta-band .btn-secondary,
.mobile-menu .btn-secondary {
  border-color: rgba(244, 247, 251, 0.28);
  color: var(--on-dark-primary);
}

.section--dark .btn-secondary:hover,
.hero .btn-secondary:hover,
.cta-band .btn-secondary:hover,
.mobile-menu .btn-secondary:hover {
  border-color: var(--on-dark-primary);
  background: rgba(244, 247, 251, 0.06);
}

.btn-ghost {
  padding: 0.5rem 0.25rem;
  color: var(--accent-700);
  font-weight: var(--weight-semibold);
}

.btn-ghost:hover {
  color: var(--accent-600);
}

.btn-ghost .icon {
  transition: transform var(--duration-fast) var(--ease-out);
}

.btn-ghost:hover .icon {
  transform: translateX(3px);
}

.btn .icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ==========================================================================
   Status badges (current / in-development / planned)
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  line-height: 1;
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.badge--core {
  background: var(--accent-100);
  color: var(--accent-700);
}

.badge--dev {
  background: #eef2fb;
  color: #3a4f8f;
}

.badge--planned {
  background: var(--surface-2);
  color: var(--slate-600);
  border-color: var(--slate-200);
}

.badge--planned::before {
  background: var(--slate-400);
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(5, 11, 20, 0.86);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid rgba(244, 247, 251, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--weight-semibold);
  font-size: var(--text-md);
  color: var(--on-dark-primary);
}

.brand-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.brand-word {
  letter-spacing: -0.01em;
}

.brand-word b {
  font-weight: var(--weight-bold);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--on-dark-secondary);
  padding-block: var(--space-2);
  border-bottom: 2px solid transparent;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--on-dark-primary);
}

.nav-links a.is-active {
  color: var(--on-dark-primary);
  border-bottom-color: var(--accent-500);
}

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

.nav-cta {
  display: inline-flex;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--on-dark-primary);
}

.nav-toggle .icon {
  width: 22px;
  height: 22px;
}

.mobile-menu {
  position: fixed;
  inset: 72px 0 0 0;
  background: var(--navy-950);
  z-index: var(--z-overlay);
  padding: var(--space-8) var(--gutter) var(--space-10);
  overflow-y: auto;
  display: none;
}

.mobile-menu.is-open {
  display: block;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-menu-links a {
  display: block;
  font-size: var(--text-xl);
  font-weight: var(--weight-medium);
  color: var(--on-dark-primary);
  padding: var(--space-4) 0;
  border-bottom: 1px solid rgba(244, 247, 251, 0.1);
}

.mobile-menu-cta {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.mobile-menu-cta .btn {
  width: 100%;
}

body.nav-open {
  overflow: hidden;
}

@media (max-width: 880px) {
  .nav-links {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  background: radial-gradient(120% 140% at 82% -10%, #123b3a 0%, transparent 55%),
    linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 62%, var(--navy-800) 100%);
  color: var(--on-dark-primary);
  overflow: hidden;
  padding-top: var(--space-24);
  padding-bottom: var(--space-20);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(244, 247, 251, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 247, 251, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 78%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: var(--space-16);
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--accent-400);
  background: rgba(18, 181, 166, 0.12);
  border: 1px solid rgba(63, 208, 193, 0.28);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

.hero-eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-400);
}

.hero h1 {
  font-size: clamp(2.25rem, 1.4rem + 3.4vw, var(--text-5xl));
  line-height: 1.08;
  max-width: 15ch;
  color: var(--on-dark-primary);
}

.hero h1 em {
  font-style: normal;
  color: var(--accent-400);
}

.hero-sub {
  margin-top: var(--space-6);
  font-size: var(--text-md);
  line-height: var(--leading-snug);
  color: var(--on-dark-secondary);
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.hero-principles {
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(244, 247, 251, 0.12);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-6);
}

.hero-principle {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.hero-principle .icon {
  width: 18px;
  height: 18px;
  color: var(--accent-400);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.hero-principle span {
  font-size: var(--text-sm);
  color: var(--on-dark-secondary);
  line-height: var(--leading-snug);
}

/* ---- Hero visual: evidence-to-decision composition ---- */

.hero-visual {
  position: relative;
  background: linear-gradient(160deg, rgba(16, 27, 46, 0.9), rgba(10, 20, 36, 0.94));
  border: 1px solid rgba(244, 247, 251, 0.1);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-dark);
  padding: var(--space-6);
}

.hero-visual-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.hero-visual-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-dark-muted);
}

.hero-visual-dots {
  display: flex;
  gap: 6px;
}

.hero-visual-dots span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(244, 247, 251, 0.18);
}

.hero-chain {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.hero-chain-node {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding-block: var(--space-3);
  position: relative;
}

.hero-chain-node:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 15px;
  top: 40px;
  bottom: -4px;
  width: 1px;
  background: linear-gradient(180deg, rgba(63, 208, 193, 0.4), rgba(63, 208, 193, 0.08));
}

.hero-chain-index {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--navy-800);
  border: 1px solid rgba(63, 208, 193, 0.35);
  color: var(--accent-400);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: var(--weight-semibold);
  flex-shrink: 0;
  z-index: 1;
}

.hero-chain-node.is-ai .hero-chain-index {
  background: transparent;
  border-style: dashed;
  color: var(--on-dark-muted);
  border-color: rgba(170, 182, 204, 0.4);
}

.hero-chain-body strong {
  display: block;
  font-size: var(--text-sm);
  color: var(--on-dark-primary);
  font-weight: var(--weight-semibold);
}

.hero-chain-body span {
  display: block;
  font-size: var(--text-xs);
  color: var(--on-dark-muted);
  margin-top: 2px;
}

.hero-visual-foot {
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid rgba(244, 247, 251, 0.1);
  font-size: var(--text-xs);
  color: var(--on-dark-muted);
  line-height: var(--leading-snug);
}

.hero-visual-foot b {
  color: var(--accent-400);
  font-weight: var(--weight-semibold);
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .hero-principles {
    grid-template-columns: 1fr;
  }

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

/* ==========================================================================
   Logo strip / approach band
   ========================================================================== */

.approach-band {
  padding-block: var(--space-16);
  border-bottom: 1px solid var(--color-border);
}

.approach-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: var(--space-16);
  align-items: start;
}

.approach-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.approach-item {
  display: flex;
  gap: var(--space-4);
}

.approach-item .num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--accent-700);
  font-weight: var(--weight-semibold);
  padding-top: 0.15rem;
}

.approach-item h3 {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
}

.approach-item p {
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
}

@media (max-width: 900px) {
  .approach-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
}

/* ==========================================================================
   Workflow diagram (How REVA works)
   ========================================================================== */

.workflow {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.workflow-step {
  background: rgba(244, 247, 251, 0.04);
  border: 1px solid rgba(244, 247, 251, 0.12);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-4);
  position: relative;
}

.workflow-step .step-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-400);
  font-weight: var(--weight-semibold);
}

.workflow-step .icon {
  width: 22px;
  height: 22px;
  color: var(--accent-400);
  margin-block: var(--space-3);
}

.workflow-step h3 {
  font-size: var(--text-sm);
  color: var(--on-dark-primary);
  font-weight: var(--weight-semibold);
}

.workflow-step p {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--on-dark-muted);
  line-height: var(--leading-snug);
}

.workflow-step::after {
  content: "";
  position: absolute;
  top: 34px;
  right: -14px;
  width: 12px;
  height: 1px;
  background: rgba(63, 208, 193, 0.4);
  display: none;
}

.workflow-step.is-ai {
  border-style: dashed;
  background: transparent;
}

.workflow-step.is-ai .step-index {
  color: var(--on-dark-muted);
}

.workflow-step.is-ai .icon {
  color: var(--on-dark-muted);
}

.workflow-note {
  margin-top: var(--space-8);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: rgba(18, 181, 166, 0.08);
  border: 1px solid rgba(63, 208, 193, 0.25);
  border-radius: var(--radius-md);
}

.workflow-note .icon {
  width: 20px;
  height: 20px;
  color: var(--accent-400);
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.workflow-note p {
  font-size: var(--text-sm);
  color: var(--on-dark-secondary);
  line-height: var(--leading-snug);
}

.workflow-note b {
  color: var(--on-dark-primary);
}

@media (max-width: 1080px) {
  .workflow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .workflow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ==========================================================================
   Capability groups
   ========================================================================== */

.capability-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
}

.capability-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7, var(--space-6)) var(--space-6);
  background: var(--surface-0);
  transition: border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}

.capability-card:hover {
  border-color: var(--accent-500);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.capability-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--accent-100);
  color: var(--accent-700);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.capability-icon .icon {
  width: 22px;
  height: 22px;
}

.capability-card h3 {
  font-size: var(--text-md);
  margin-bottom: var(--space-3);
}

.capability-card ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.capability-card li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  line-height: var(--leading-snug);
}

.capability-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-500);
}

/* ==========================================================================
   Technology grid
   ========================================================================== */

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: var(--space-5);
}

.tech-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  background: var(--surface-0);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.tech-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.tech-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--navy-900);
  color: var(--accent-400);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-icon .icon {
  width: 20px;
  height: 20px;
}

.tech-card h3 {
  font-size: var(--text-base);
}

.tech-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-snug);
}

.tech-card.is-planned {
  background: var(--surface-1);
  border-style: dashed;
}

.tech-card.is-planned .tech-icon {
  background: var(--surface-2);
  color: var(--slate-500);
}

/* ==========================================================================
   Due diligence pipeline
   ========================================================================== */

.dd-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--space-16);
  align-items: center;
}

.dd-copy .section-head {
  margin-bottom: var(--space-8);
}

.dd-points {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.dd-point {
  display: flex;
  gap: var(--space-4);
}

.dd-point .icon {
  width: 20px;
  height: 20px;
  color: var(--accent-600);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.dd-point h3 {
  font-size: var(--text-base);
}

.dd-point p {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-snug);
}

.dd-callout {
  margin-top: var(--space-8);
  padding: var(--space-5) var(--space-6);
  border-left: 3px solid var(--accent-500);
  background: var(--accent-050);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.dd-callout p {
  font-size: var(--text-sm);
  color: var(--ink-700);
  line-height: var(--leading-snug);
}

.dd-diagram {
  background: var(--navy-950);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  color: var(--on-dark-primary);
}

.dd-flow {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.dd-flow-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.dd-flow-pill {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid rgba(244, 247, 251, 0.14);
  background: rgba(244, 247, 251, 0.04);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
}

.dd-flow-pill.is-source {
  color: var(--on-dark-secondary);
}

.dd-flow-pill.is-reva {
  border-color: rgba(63, 208, 193, 0.4);
  color: var(--accent-400);
  font-weight: var(--weight-semibold);
}

.dd-flow-arrow {
  color: var(--on-dark-muted);
  flex-shrink: 0;
}

.dd-flow-arrow .icon {
  width: 16px;
  height: 16px;
}

.dd-flow-result {
  margin-top: var(--space-2);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: rgba(18, 181, 166, 0.1);
  border: 1px solid rgba(63, 208, 193, 0.3);
  font-size: var(--text-sm);
  color: var(--on-dark-primary);
  text-align: center;
}

@media (max-width: 980px) {
  .dd-layout {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
}

/* ==========================================================================
   Lifecycle timeline
   ========================================================================== */

.lifecycle-track {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.lifecycle-stage {
  text-align: center;
  padding: var(--space-4) var(--space-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--surface-0);
}

.lifecycle-stage .stage-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-700);
  font-weight: var(--weight-semibold);
}

.lifecycle-stage h3 {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
}

.lifecycle-stage.is-evolving {
  border-style: dashed;
  background: var(--surface-1);
}

.lifecycle-legend {
  display: flex;
  gap: var(--space-6);
  margin-top: var(--space-6);
  flex-wrap: wrap;
}

.lifecycle-legend span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent-500);
}

.legend-dot.is-evolving {
  background: var(--slate-300);
  border: 1px solid var(--slate-400);
}

.lifecycle-future {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.lifecycle-future .icon {
  width: 14px;
  height: 14px;
}

.lifecycle-future .future-tag {
  padding: 2px var(--space-2);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.onboarding-strip {
  margin-top: var(--space-12);
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--navy-900);
  border-radius: var(--radius-lg);
  color: var(--on-dark-primary);
}

.onboarding-node {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--on-dark-secondary);
  padding: var(--space-2);
}

.onboarding-node strong {
  display: block;
  font-size: var(--text-sm);
  color: var(--on-dark-primary);
  margin-bottom: 2px;
}

.onboarding-arrow {
  display: flex;
  justify-content: center;
  color: var(--accent-400);
}

.onboarding-arrow .icon {
  width: 16px;
  height: 16px;
}

@media (max-width: 980px) {
  .lifecycle-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .onboarding-strip {
    grid-template-columns: 1fr;
  }

  .onboarding-arrow {
    transform: rotate(90deg);
  }
}

@media (max-width: 560px) {
  .lifecycle-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ==========================================================================
   Personas
   ========================================================================== */

.persona-tabs {
  display: flex;
  gap: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
}

.persona-tab {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.persona-tab[aria-selected="true"] {
  color: var(--ink-900);
  border-bottom-color: var(--accent-500);
  font-weight: var(--weight-semibold);
}

.persona-panel {
  display: none;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: var(--space-12);
}

.persona-panel[data-active="true"] {
  display: grid;
}

.persona-panel h3 {
  font-size: var(--text-2xl);
  max-width: 16ch;
}

.persona-panel > .persona-copy > p {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-md);
  line-height: var(--leading-snug);
}

.persona-features {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  align-content: start;
}

.persona-feature {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.persona-feature h4 {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
}

.persona-feature p {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-snug);
}

@media (max-width: 900px) {
  .persona-panel {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

@media (max-width: 560px) {
  .persona-features {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Trust / engineering integrity
   ========================================================================== */

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.trust-item {
  background: var(--surface-0);
  padding: var(--space-7, var(--space-6)) var(--space-6);
}

.trust-item .icon {
  width: 22px;
  height: 22px;
  color: var(--accent-600);
  margin-bottom: var(--space-4);
}

.trust-item h3 {
  font-size: var(--text-base);
}

.trust-item p {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-snug);
}

.validation-note {
  margin-top: var(--space-10);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--surface-1);
  display: flex;
  gap: var(--space-4);
}

.validation-note .icon {
  width: 22px;
  height: 22px;
  color: var(--accent-600);
  flex-shrink: 0;
}

.validation-note p {
  font-size: var(--text-sm);
  color: var(--ink-700);
  line-height: var(--leading-snug);
}

.validation-note code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--surface-2);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

/* ==========================================================================
   CTA band
   ========================================================================== */

.cta-band {
  position: relative;
  background: radial-gradient(120% 160% at 15% 0%, #123b3a 0%, transparent 50%),
    linear-gradient(180deg, var(--navy-900), var(--navy-950));
  color: var(--on-dark-primary);
  text-align: center;
  padding-block: var(--space-24);
}

.cta-band h2 {
  font-size: var(--text-3xl);
  max-width: 24ch;
  margin-inline: auto;
}

.cta-band p {
  margin-top: var(--space-5);
  color: var(--on-dark-secondary);
  max-width: 52ch;
  margin-inline: auto;
  font-size: var(--text-md);
  line-height: var(--leading-snug);
}

.cta-actions {
  margin-top: var(--space-8);
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.cta-fine {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: var(--on-dark-secondary);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--navy-950);
  color: var(--on-dark-secondary);
  padding-top: var(--space-20);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.3fr repeat(4, 1fr);
  gap: var(--space-10);
  padding-bottom: var(--space-16);
  border-bottom: 1px solid rgba(244, 247, 251, 0.1);
}

.footer-brand .brand {
  color: var(--on-dark-primary);
  margin-bottom: var(--space-4);
}

.footer-brand p {
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
  color: var(--on-dark-muted);
  max-width: 34ch;
}

.footer-col h3 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--on-dark-muted);
  margin-bottom: var(--space-4);
  font-weight: var(--weight-semibold);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-col a {
  font-size: var(--text-sm);
  color: var(--on-dark-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer-col a:hover {
  color: var(--on-dark-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding-block: var(--space-6);
  font-size: var(--text-xs);
  color: var(--on-dark-muted);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer-bottom-links a:hover {
  color: var(--on-dark-secondary);
}

@media (max-width: 980px) {
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Reveal-on-scroll (progressive enhancement)
   ========================================================================== */

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   Responsive base adjustments
   ========================================================================== */

@media (max-width: 980px) {
  .section {
    padding-block: var(--space-16);
  }

  .approach-band {
    padding-block: var(--space-12);
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 1.25rem;
  }

  .section-title {
    font-size: var(--text-2xl);
  }

  .cta-band h2 {
    font-size: var(--text-2xl);
  }
}