/* landing.css — HUMMBL temporary landing page
   Austere, evidence-forward layout. Loaded after shared.css. */

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.skip-link {
  position: fixed;
  top: 0;
  transform: translateY(-120%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  top: 0;
  transform: translateY(0);
}

.site-header,
.landing,
.footer {
  position: relative;
  z-index: 1;
}

.site-header {
  width: min(100%, 1120px);
  margin: 0 auto;
  min-height: 0 !important;
  padding: 1.25rem 1.5rem !important;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem !important;
  border-bottom: 1px solid var(--border-subtle) !important;
}

.brand {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--accent-green);
  text-decoration: none;
}

.trust-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1.25rem;
}

.trust-nav a,
.footer a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
}

.trust-nav a:hover,
.footer a:hover,
.text-links a:hover,
.standards-links a:hover {
  color: var(--accent-green);
}

.landing {
  flex: 1;
  width: min(100%, 1080px);
  margin: 0 auto;
  padding: 0 1.5rem 2rem;
}

main.landing .hero {
  min-height: 37rem;
  margin-bottom: 0 !important;
  padding: 6.5rem 0 4.5rem !important;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center !important;
  border-bottom: 0 !important;
}

main.landing .hero h1 {
  max-width: 920px !important;
  margin: 0 0 1.5rem !important;
  font-size: clamp(2.6rem, 6vw, 4.75rem) !important;
  font-weight: 700 !important;
  line-height: 1.05 !important;
  letter-spacing: -0.04em !important;
  color: var(--text-primary);
  text-wrap: balance !important;
}

main.landing .hero .tagline {
  max-width: 760px;
  margin: 0 0 2rem !important;
  font-size: clamp(1.05rem, 2vw, 1.25rem) !important;
  line-height: 1.65 !important;
  color: var(--text-secondary) !important;
  text-wrap: pretty;
}

.tagline strong {
  color: var(--accent-green);
  font-weight: 600;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  transition:
    background 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease;
}

.cta-primary {
  background: var(--accent-green);
  border-color: var(--accent-green);
  color: var(--bg-primary);
}

.cta-primary:hover {
  background: var(--accent-green-hover);
  border-color: var(--accent-green-hover);
}

.cta-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.cta-secondary:hover {
  border-color: var(--border-prominent);
}

.install {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.6875rem 1rem;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  background: rgba(11, 15, 20, 0.8);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.install code {
  font-family: inherit;
}

.install .prompt {
  color: var(--accent-green);
  user-select: none;
}

.proof-section,
.invariants,
.proof-demo,
.audience,
.assurance {
  scroll-margin-top: 1.5rem;
  padding: 5.5rem 0;
  border-top: 1px solid var(--border-subtle);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2.5rem;
}

.section-index,
.invariant-code,
.audience-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-green);
}

.section-index {
  margin: 0 0 0.75rem;
}

.section-heading h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.section-heading > p:last-child {
  margin: 0;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.section-heading strong {
  color: var(--text-primary);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.proof-item {
  min-width: 0;
  padding: 1.5rem 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
  border-right: 1px solid var(--border-subtle);
  transition: background 0.15s ease;
}

.proof-item:last-child {
  border-right: 0;
}

.proof-item:hover {
  background: rgba(27, 122, 61, 0.06);
}

.proof-item strong {
  display: block;
  min-height: 2.5rem;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  line-height: 1.2;
  color: var(--text-primary);
}

.proof-item span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  line-height: 1.5;
  color: var(--text-tertiary);
}

.proof-scope {
  max-width: 900px;
  margin: 1.25rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--text-tertiary);
}

.proof-scope code,
.boundary-note code {
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.proof-scope a,
.standards-links a {
  color: var(--text-secondary);
}

.invariant-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.invariant-grid article {
  padding: 2rem;
  border-right: 1px solid var(--border-subtle);
}

.invariant-grid article:first-child {
  padding-left: 0;
}

.invariant-grid article:last-child {
  padding-right: 0;
  border-right: 0;
}

.invariant-grid h3 {
  margin: 0.75rem 0;
  font-size: 1.25rem;
  line-height: 1.3;
}

.invariant-grid p,
.audience-grid p,
.audience-grid li,
.assurance-list dd,
.boundary-note p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.proof-flow {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  padding: 0;
  margin: 0 0 1.5rem;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.proof-flow li {
  padding: 0.875rem 1rem;
  border-right: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.proof-flow li:last-child {
  border-right: 0;
}

.proof-flow span {
  margin-right: 0.5rem;
  color: var(--accent-green);
}

.demo-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.75fr) minmax(230px, 0.75fr);
  gap: 2rem;
  align-items: start;
}

.terminal-code {
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  background: var(--bg-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--text-secondary);
  text-align: left;
  tab-size: 4;
}

.boundary-note {
  padding-left: 1.5rem;
  border-left: 2px solid var(--accent-green);
}

.boundary-note h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.boundary-note p {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
}

.boundary-note p:last-child {
  margin-bottom: 0;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.audience-grid article {
  padding: 2rem 2.5rem 2rem 0;
}

.audience-grid article + article {
  padding: 2rem 0 2rem 2.5rem;
  border-left: 1px solid var(--border-subtle);
}

.audience-grid h3 {
  margin: 0.75rem 0;
  font-size: 1.5rem;
}

.audience-grid ul {
  margin: 1.25rem 0;
  padding-left: 1.1rem;
}

.audience-grid li {
  margin-bottom: 0.35rem;
}

.text-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.text-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-green);
  text-underline-offset: 0.25rem;
}

.assurance-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.assurance-list > div {
  padding: 1.75rem;
  border-right: 1px solid var(--border-subtle);
}

.assurance-list > div:first-child {
  padding-left: 0;
}

.assurance-list > div:last-child {
  padding-right: 0;
  border-right: 0;
}

.assurance-list dt {
  margin-bottom: 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.assurance-list dd {
  margin: 0;
  font-size: 0.8125rem;
}

.standards-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-tertiary);
}

.footer {
  width: min(100%, 1120px);
  margin: 0 auto !important;
  padding: 2rem 1.5rem !important;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--border-subtle) !important;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.footer nav {
  display: flex;
  gap: 1rem;
}

@media (max-width: 880px) {
  .site-header {
    gap: 1rem !important;
  }

  .trust-nav {
    gap: 0.75rem;
  }

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

  .proof-item {
    border-bottom: 1px solid var(--border-subtle);
  }

  .proof-item:nth-child(2n) {
    border-right: 0;
  }

  .proof-item:last-child {
    grid-column: 1 / -1;
    border-bottom: 0;
  }

  .invariant-grid,
  .assurance-list {
    grid-template-columns: 1fr;
  }

  .invariant-grid article,
  .invariant-grid article:first-child,
  .invariant-grid article:last-child,
  .assurance-list > div,
  .assurance-list > div:first-child,
  .assurance-list > div:last-child {
    padding: 1.5rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--border-subtle);
  }

  .invariant-grid article:last-child,
  .assurance-list > div:last-child {
    border-bottom: 0;
  }

  .demo-layout {
    grid-template-columns: 1fr;
  }

  .boundary-note {
    max-width: 680px;
  }
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    gap: 1rem;
  }

  .trust-nav {
    flex-wrap: wrap;
    gap: 0.5rem 0.875rem;
  }

  main.landing .hero {
    min-height: auto;
    padding: 4.5rem 0 4rem !important;
  }

  main.landing .hero h1 {
    font-size: clamp(2.25rem, 12vw, 3.25rem) !important;
  }

  main.landing .hero h1 br {
    display: none;
  }

  .proof-section,
  .invariants,
  .proof-demo,
  .audience,
  .assurance {
    padding: 4rem 0;
  }

  .proof-flow {
    grid-template-columns: 1fr;
  }

  .proof-flow li {
    border-right: 0;
    border-bottom: 1px solid var(--border-subtle);
  }

  .proof-flow li:last-child {
    border-bottom: 0;
  }

  .audience-grid {
    grid-template-columns: 1fr;
  }

  .audience-grid article,
  .audience-grid article + article {
    padding: 1.75rem 0;
    border-left: 0;
  }

  .audience-grid article + article {
    border-top: 1px solid var(--border-subtle);
  }

  .footer {
    flex-direction: column;
  }
}

@media (max-width: 430px) {
  .site-header {
    flex-direction: column;
    padding: 1rem !important;
  }

  .landing {
    padding-inline: 1rem;
  }

  .cta-group,
  .cta {
    width: 100%;
  }

  .install {
    width: 100%;
    justify-content: center;
    font-size: 0.75rem;
  }

  .proof-grid {
    grid-template-columns: 1fr;
  }

  .proof-item,
  .proof-item:nth-child(2n),
  .proof-item:last-child {
    grid-column: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border-subtle);
  }

  .proof-item:last-child {
    border-bottom: 0;
  }

  .terminal-code {
    padding: 1rem;
    font-size: 0.6875rem;
  }
}

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

  .cta,
  .proof-item,
  .skip-link {
    transition: none;
  }
}

/* ── Challenge section ── */
.challenge {
  margin-bottom: 4rem;
  padding: 3rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.challenge .section-heading {
  text-align: center;
  margin-bottom: 2.5rem;
}

.challenge .section-heading h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.challenge-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.challenge-stat {
  text-align: center;
  padding: 1.5rem 1rem;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
}

.challenge-stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  color: var(--accent-green);
  margin-bottom: 0.5rem;
}

.challenge-stat span {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.challenge-close {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-primary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.5;
}

/* ── Architecture diagram ── */
.arch-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 2rem 0 3rem;
  flex-wrap: wrap;
}

.arch-layer {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border-prominent);
  background: var(--bg-elevated);
  min-width: 180px;
}

.arch-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-green);
  margin-bottom: 0.5rem;
}

.arch-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-align: center;
}

.arch-arrow {
  font-size: 1.5rem;
  color: var(--accent-green);
  font-family: var(--font-mono);
}

@media (max-width: 680px) {
  .arch-diagram {
    flex-direction: column;
  }

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

/* ── Pillar primitives list ── */
.pillar-primitives {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.pillar-primitives li {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent-green);
  background: rgba(27, 122, 61, 0.1);
  border: 1px solid rgba(27, 122, 61, 0.2);
  padding: 0.2rem 0.5rem;
}

/* ── OWASP mapping grid ── */
.owasp-mapping {
  margin-bottom: 4rem;
}

.owasp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.owasp-item {
  padding: 1.25rem;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
}

.owasp-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--accent-green);
  background: rgba(27, 122, 61, 0.1);
  border: 1px solid rgba(27, 122, 61, 0.2);
  padding: 0.15rem 0.4rem;
  margin-bottom: 0.5rem;
}

.owasp-item h3 {
  font-size: 0.9375rem;
  margin: 0 0 0.5rem;
  color: var(--text-primary);
}

.owasp-item p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin: 0;
}

/* ── Integrations grid ── */
.integrations {
  margin-bottom: 4rem;
}

.integration-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.integration-item {
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  text-decoration: none;
  transition: border-color 0.15s;
}

.integration-item:hover {
  border-color: var(--border-prominent);
}

.integration-item strong {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.integration-item span {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

/* ── Comparison table ── */
.comparison {
  margin-bottom: 4rem;
}

.comparison-table {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 1px;
  background: var(--border-subtle);
  border: 1px solid var(--border-subtle);
}

.comparison-row {
  display: contents;
}

.comparison-row > div {
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  font-size: 0.8125rem;
}

.comparison-header > div {
  background: var(--bg-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.comparison-row > div[role="rowheader"] {
  color: var(--text-secondary);
  font-weight: 500;
}

.cmp-yes {
  color: var(--accent-green);
  font-weight: 600;
}

.cmp-no {
  color: var(--text-tertiary);
}

.cmp-partial {
  color: var(--accent-warm);
}

@media (max-width: 680px) {
  .comparison-table {
    grid-template-columns: 1fr;
  }

  .comparison-row > div {
    border-bottom: 1px solid var(--border-subtle);
  }

  .comparison-header {
    display: none;
  }

  .comparison-row > div[role="rowheader"]::before {
    content: "→ ";
    color: var(--accent-green);
  }
}