/* Human in the Loop Systems — Site styles */

/* Accessibility: Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--hi-space-md);
  padding: var(--hi-space-sm) var(--hi-space-md);
  background: var(--hi-base-ink);
  color: var(--hi-porcelain);
  font-family: var(--hi-font-heading);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--hi-radius);
  z-index: 1000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: var(--hi-space-md);
  outline: 3px solid var(--hi-deep-teal);
  outline-offset: 2px;
}

/* Focus styles — visible for keyboard, minimal for mouse */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--hi-deep-teal);
  outline-offset: 2px;
}

.btn:focus-visible {
  outline: 2px solid var(--hi-base-ink);
  outline-offset: 2px;
}

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

  .skip-link:focus {
    transition: none;
  }
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--hi-space-md);
  box-sizing: border-box;
}

body {
  overflow-x: hidden;
}

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

/* Header — more depth */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 245, 243, 0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(15, 23, 32, 0.08);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 26px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--hi-space-md);
  text-decoration: none;
  color: var(--hi-base-ink);
  font-family: var(--hi-font-heading);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
}

.logo-mark {
  height: 56px;
  width: auto;
  display: block;
}

.logo-text strong {
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  gap: 44px;
}

.nav a {
  color: var(--hi-base-ink);
  text-decoration: none;
  font-size: 1.04rem;
  font-weight: 600;
}

.nav a:hover {
  color: var(--hi-deep-teal);
}

.btn-sm {
  padding: 8px 16px;
  font-size: var(--hi-text-sm);
}

.btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Main hero — HILS-Main landscape/portrait */
.hero-main {
  position: relative;
  min-height: 55vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-main-bg {
  position: absolute;
  inset: 0;
  background-image: url(../img/HILS-MainLandscape.png);
  background-size: cover;
  background-position: center;
}

@media (orientation: portrait) {
  .hero-main-bg {
    background-image: url(../img/HILS-MainPortrait.png);
  }
}

.hero-main-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(246, 245, 243, 0.3) 0%, rgba(246, 245, 243, 0.85) 100%);
}

.hero-main-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding: 48px var(--hi-space-md);
}

.hero-main h1 {
  font-size: var(--hi-text-hero);
  margin: 0 0 var(--hi-space-md);
  color: var(--hi-base-ink);
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: 1.4rem;
  line-height: 1.45;
  color: var(--hi-base-ink);
  margin: 0 0 14px;
  font-weight: 500;
}

.hero-support {
  font-size: var(--hi-text-lg);
  line-height: 1.55;
  color: var(--hi-graphite);
  margin: 0 0 var(--hi-space-sm);
}

.hero-credibility {
  font-size: var(--hi-text-md);
  line-height: 1.6;
  color: var(--hi-graphite);
  margin: 0 0 var(--hi-space-lg);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--hi-space-sm);
  justify-content: center;
}

.hero-main .btn {
  display: inline-block;
}

.section-intro {
  font-size: 1.18rem;
  color: var(--hi-graphite);
  margin: 0 0 var(--hi-space-md);
  max-width: 560px;
}

.link-teal {
  color: var(--hi-deep-teal);
  text-decoration: none;
}

.link-teal:hover {
  text-decoration: underline;
}

.about-teaser {
  padding: var(--hi-space-lg) 0;
  background: var(--hi-mist);
}

.section-eyebrow {
  font-size: var(--hi-text-2xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--hi-deep-teal);
  margin: 0 0 var(--hi-space-xs);
}

.about-teaser h2 {
  font-size: var(--hi-text-2xl);
  margin: 0 0 var(--hi-space-sm);
}

.about-teaser .container {
  background: white;
  border: 1px solid rgba(15, 23, 32, 0.08);
  border-radius: 16px;
  box-shadow: 0 14px 40px rgba(15, 23, 32, 0.06);
  padding: 32px;
}

.about-teaser p {
  max-width: 640px;
  font-size: var(--hi-text-lg);
  line-height: 1.6;
  color: var(--hi-graphite);
  margin: 0 0 var(--hi-space-sm);
}

/* Credibility band */
.credibility-band {
  padding: 10px 0 42px;
  background: linear-gradient(to bottom, var(--hi-mist) 0%, var(--hi-porcelain) 100%);
}

.credibility-label {
  font-size: var(--hi-text-2xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--hi-deep-teal);
  margin: 0 0 var(--hi-space-xs);
}

.credibility-statement {
  margin: 0;
  padding: 22px 26px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(15, 23, 32, 0.08);
  border-top: 3px solid var(--hi-deep-teal);
  box-shadow: 0 12px 34px rgba(15, 23, 32, 0.05);
  font-size: 1.18rem;
  line-height: 1.6;
  color: var(--hi-base-ink);
}

/* How we work */
.how-we-work {
  padding: 48px 0;
}

.how-we-work h2 {
  font-size: var(--hi-text-2xl);
  margin: 0 0 var(--hi-space-md);
}

.how-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.how-steps li {
  display: flex;
  align-items: flex-start;
  gap: var(--hi-space-md);
  padding: 22px 24px;
  background: white;
  border: 1px solid rgba(15, 23, 32, 0.08);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(15, 23, 32, 0.05);
  font-size: var(--hi-text-base);
  line-height: 1.5;
  color: var(--hi-graphite);
}

.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--hi-deep-teal);
  color: white;
  font-size: var(--hi-text-sm);
  font-weight: 600;
  border-radius: 999px;
}

.step-copy {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.how-steps strong {
  display: block;
  color: var(--hi-base-ink);
  font-size: var(--hi-text-lg);
}

.step-copy span {
  display: block;
  font-size: var(--hi-text-base);
  line-height: 1.6;
}

/* Why human in the loop */
.why-section {
  padding: 40px 0;
  background: var(--hi-mist);
}

.why-section h2 {
  font-size: var(--hi-text-2xl);
  margin: 0 0 var(--hi-space-md);
}

.why-lead {
  font-size: var(--hi-text-xl);
  line-height: 1.5;
  color: var(--hi-base-ink);
  margin: 0 0 var(--hi-space-sm);
  font-weight: 500;
}

.why-section p {
  max-width: 620px;
  font-size: var(--hi-text-md);
  line-height: 1.65;
  color: var(--hi-graphite);
  margin: 0;
}

.why-section p + p {
  margin-top: var(--hi-space-sm);
}

/* Differentiator — context, structure, orchestration (prominent band) */
.differentiator {
  padding: 40px 0;
  background: var(--hi-mist);
}

.differentiator .container {
  margin-bottom: 24px;
}

.differentiator-headline {
  font-size: 1.7rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--hi-base-ink);
  margin: 0 0 10px;
  max-width: 720px;
}

.differentiator-intro {
  font-size: var(--hi-text-lg);
  line-height: 1.6;
  color: var(--hi-graphite);
  margin: 0;
  max-width: 680px;
}

/* Hero panels — 3x1 portrait (ref: 1536×1024 canvas, 512×1024 cards, no border) */
.hero-panels {
  padding: var(--hi-space-lg) 0;
  background: var(--hi-porcelain);
}

.differentiator .hero-panels-inner {
  background: transparent;
}

.hero-panels-intro {
  max-width: 640px;
  margin: 0 auto var(--hi-space-md);
  font-size: var(--hi-text-lg);
  line-height: 1.5;
  color: var(--hi-graphite);
  text-align: center;
}

.hero-panels-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--hi-space-md);
}

/* Portrait aspect 512/1024 = 0.5 (exact from image) */
.hero-panel {
  display: flex;
  flex-direction: column;
  color: var(--hi-base-ink);
  background: white;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(15, 23, 32, 0.04);
}

.hero-panel-img {
  aspect-ratio: 4 / 3;
  flex-shrink: 0;
  min-height: 150px;
  max-height: 190px;
  background-size: 320% auto;
  background-position: var(--bg-pos, 0 0);
  background-repeat: no-repeat;
  background-image: url(../img/home-panorama-system.png);
}

.hero-panel[data-panel="1"] .hero-panel-img { --bg-pos: 8% 50%; }
.hero-panel[data-panel="2"] .hero-panel-img { --bg-pos: 50% 50%; }
.hero-panel[data-panel="3"] .hero-panel-img { --bg-pos: 92% 50%; }

.hero-panel-content {
  padding: 16px 16px 18px;
}

.hero-panel-title {
  font-size: var(--hi-text-lg);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 6px;
  color: var(--hi-base-ink);
}

.hero-panel-content p {
  font-size: var(--hi-text-sm);
  line-height: 1.5;
  color: var(--hi-graphite);
  margin: 0 0 6px;
}

.hero-panel-outcome {
  font-size: var(--hi-text-sm);
  font-weight: 500;
  color: var(--hi-base-ink);
  margin: 0;
}

/* Panel grid — 3x2 (ref: 1536×1024 canvas, 512×512 cards, labels below) */
.panel-grid {
  padding: var(--hi-space-lg) 0;
  background: var(--hi-porcelain);
}

.panel-grid .container {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--hi-space-md);
  padding-right: var(--hi-space-md);
}

.panel-grid .container.container-narrow {
  max-width: 640px;
}

.panel-grid .container h2 {
  font-size: var(--hi-text-2xl);
  margin: 0 0 var(--hi-space-xs);
}

.panel-grid-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--hi-space-md);
}

.panel-tile {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--hi-base-ink);
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 12px 34px rgba(15, 23, 32, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.panel-tile:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(15, 23, 32, 0.09);
}

.panel-tile-img {
  aspect-ratio: 1;
  background-size: 300% 200%;
  background-position: var(--tile-pos, 0 0);
  background-repeat: no-repeat;
  background-image: url(../img/HILS-3x2.png);
}

.panel-tile[data-tile="1"] .panel-tile-img { --tile-pos: 0% 0; }
.panel-tile[data-tile="2"] .panel-tile-img { --tile-pos: 50% 0; }
.panel-tile[data-tile="3"] .panel-tile-img { --tile-pos: 100% 0; }
.panel-tile[data-tile="4"] .panel-tile-img { --tile-pos: 0% 100%; }
.panel-tile[data-tile="5"] .panel-tile-img { --tile-pos: 50% 100%; }
.panel-tile[data-tile="6"] .panel-tile-img { --tile-pos: 100% 100%; }

.panel-tile-caption {
  padding: 24px 24px 28px;
  text-align: left;
}

.panel-tile-label {
  display: block;
  font-family: var(--hi-font-heading);
  font-weight: 500;
  font-size: var(--hi-text-xl);
  line-height: 1.35;
  color: var(--hi-base-ink);
  margin: 0 0 10px;
}

.panel-tile-outcome {
  display: block;
  font-size: var(--hi-text-md);
  line-height: 1.65;
  color: var(--hi-graphite);
}

/* CTA */
.cta {
  padding: var(--hi-space-lg) 0;
  background: var(--hi-mist);
  text-align: center;
}

.cta .container {
  max-width: 560px;
}

.cta h2 {
  font-size: var(--hi-text-2xl);
  margin: 0 0 var(--hi-space-sm);
}

.cta-text {
  font-size: var(--hi-text-md);
  line-height: 1.5;
  margin: 0 0 var(--hi-space-md);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* Detail page hero — HILS-Main landscape/portrait */
.detail-hero {
  position: relative;
  min-height: 36vh;
  display: flex;
  align-items: flex-end;
  padding-bottom: var(--hi-space-lg);
}

.detail-hero-bg {
  position: absolute;
  inset: 0;
  background-image: url(../img/HILS-MainLandscape.png);
  background-size: cover;
  background-position: center;
}

@media (orientation: portrait) {
  .detail-hero-bg {
    background-image: url(../img/HILS-MainPortrait.png);
  }
}

.detail-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(246, 245, 243, 0.95) 0%, rgba(246, 245, 243, 0.4) 50%, transparent);
}

.detail-hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  box-sizing: border-box;
}

.detail-hero .container.container-narrow {
  max-width: 640px;
}

.back-link {
  display: inline-block;
  color: var(--hi-deep-teal);
  text-decoration: none;
  font-size: var(--hi-text-sm);
  margin-bottom: var(--hi-space-sm);
}

.back-link:hover {
  text-decoration: underline;
}

.detail-hero h1 {
  margin: 0 0 var(--hi-space-xs);
}

.detail-hero .lead {
  font-size: var(--hi-text-lg);
  line-height: 1.5;
  color: var(--hi-graphite);
  margin: 0;
}

.services-intro {
  font-size: var(--hi-text-base);
  line-height: 1.6;
  color: var(--hi-graphite);
  margin: 0 0 var(--hi-space-lg);
}

.detail-intro-card {
  margin: 0 0 var(--hi-space-lg);
  padding: 24px 24px 26px;
  background: white;
  border: 1px solid rgba(15, 23, 32, 0.08);
  border-top: 3px solid var(--hi-deep-teal);
  border-radius: 16px;
  box-shadow: 0 12px 34px rgba(15, 23, 32, 0.05);
}

.detail-intro-card p:last-child {
  margin-bottom: 0;
}

.detail-body {
  padding: var(--hi-space-lg) 0;
}

.container-narrow {
  max-width: 680px;
}

.detail-body .container {
  max-width: 720px;
}

.detail-body .container-narrow {
  max-width: 640px;
}

.service-block,
.approach-block {
  margin-bottom: var(--hi-space-lg);
  padding: 24px 24px 26px;
  background: white;
  border: 1px solid rgba(15, 23, 32, 0.08);
  border-radius: 16px;
  box-shadow: 0 12px 34px rgba(15, 23, 32, 0.05);
}

.service-block:last-of-type,
.approach-block:last-of-type {
  margin-bottom: 0;
}

.service-outcome {
  font-size: var(--hi-text-base);
  color: var(--hi-graphite);
  margin-bottom: var(--hi-space-sm);
}

.cta-inline {
  margin-top: var(--hi-space-lg);
  margin-bottom: 0;
}

.approach-statement {
  font-size: var(--hi-text-base);
  line-height: 1.6;
  color: var(--hi-graphite);
  margin: 0 0 var(--hi-space-lg);
}

.approach-block p:last-child,
.service-block p:last-child {
  margin-bottom: 0;
}

.detail-body h2 {
  font-size: var(--hi-text-xl);
  margin: var(--hi-space-lg) 0 var(--hi-space-sm);
}

.detail-body h2:first-child {
  margin-top: 0;
}

.detail-intro-card + h2 {
  margin-top: 0;
}

.detail-body p {
  font-size: var(--hi-text-base);
  line-height: 1.6;
  margin: 0 0 var(--hi-space-sm);
}

.detail-body ul {
  margin: 0 0 var(--hi-space-sm);
  padding-left: 1.25rem;
}

.detail-body li {
  margin-bottom: var(--hi-space-xs);
}

.detail-body a {
  color: var(--hi-deep-teal);
  text-decoration: none;
}

.detail-body a.btn-primary {
  color: white;
}

.detail-body a:hover {
  text-decoration: underline;
}

/* Contact form */
.form-success {
  display: none; /* Shown via JS when ?sent=1 */
  margin-bottom: var(--hi-space-lg);
  padding: var(--hi-space-lg) var(--hi-space-md);
  background: rgba(15, 122, 114, 0.08);
  border-left: 4px solid var(--hi-deep-teal);
  border-radius: var(--hi-radius);
  max-width: 480px;
}
.form-success-title {
  font-family: var(--hi-font-heading);
  font-weight: 600;
  font-size: var(--hi-text-xl);
  color: var(--hi-deep-teal);
  margin: 0 0 var(--hi-space-xs);
}
.form-success p:last-child {
  margin: 0;
  color: var(--hi-graphite);
  line-height: 1.6;
}

.form-status {
  margin-bottom: var(--hi-space-md);
  padding: var(--hi-space-sm) var(--hi-space-md);
  border-radius: var(--hi-radius);
  font-size: var(--hi-text-sm);
}
.form-status-success {
  background: rgba(15, 122, 114, 0.12);
  color: var(--hi-deep-teal);
}
.form-status-error {
  background: rgba(176, 122, 75, 0.12);
  color: var(--hi-graphite);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--hi-space-sm);
  margin-bottom: var(--hi-space-lg);
  max-width: 480px;
  width: 100%;
}

.contact-form label {
  font-size: var(--hi-text-sm);
  font-weight: 500;
  color: var(--hi-base-ink);
}

.contact-form input,
.contact-form textarea {
  font-family: var(--hi-font-body);
  font-size: 16px; /* 16px prevents iOS zoom on focus */
  padding: var(--hi-space-sm) var(--hi-space-md);
  border: 1px solid rgba(15, 23, 32, 0.15);
  border-radius: var(--hi-radius);
  background: var(--hi-porcelain);
  width: 100%;
  box-sizing: border-box;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--hi-deep-teal);
  outline-offset: 2px;
}

.contact-form textarea {
  resize: vertical;
  min-height: 100px;
}

.contact-form button {
  align-self: flex-start;
  margin-top: var(--hi-space-xs);
}

/* Footer */
.site-footer {
  padding: var(--hi-space-md) 0;
  font-size: var(--hi-text-base);
  color: var(--hi-graphite);
}

/* Responsive */
@media (max-width: 768px) {
  .site-header .container {
    flex-wrap: wrap;
    gap: var(--hi-space-sm);
  }

  .logo {
    font-size: 1.2rem;
  }

  .logo-mark {
    height: 44px;
  }

  .nav {
    gap: var(--hi-space-md);
  }

  .nav a:not(.btn) {
    font-size: var(--hi-text-sm);
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .hero-main {
    min-height: 55vh;
  }

  .hero-main-content {
    padding: var(--hi-space-md);
  }

  .hero-lead {
    font-size: var(--hi-text-xl);
  }

  .hero-ctas {
    gap: var(--hi-space-sm);
  }

  .hero-ctas .btn {
    width: 100%;
    max-width: 280px;
  }

  .differentiator-headline {
    font-size: var(--hi-text-xl);
  }

  .hero-panels-inner {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 0 var(--hi-space-md);
  }

  .hero-panel-img {
    aspect-ratio: 16 / 10;
    min-height: 0;
    max-height: 170px;
  }

  .panel-grid-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--hi-space-md);
    padding: 0 var(--hi-space-md);
  }

  .how-steps {
    grid-template-columns: 1fr;
  }

  .detail-hero {
    min-height: 35vh;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: var(--hi-space-sm);
    padding-right: var(--hi-space-sm);
  }

  .site-header .container {
    padding-left: var(--hi-space-sm);
    padding-right: var(--hi-space-sm);
  }

  .hero-main {
    min-height: 50vh;
  }

  .hero-main h1 {
    font-size: var(--hi-text-2xl);
  }

  .hero-lead {
    font-size: var(--hi-text-lg);
  }

  .hero-support {
    font-size: var(--hi-text-base);
  }

  .panel-grid-inner {
    grid-template-columns: 1fr;
    gap: var(--hi-space-md);
    padding: 0 var(--hi-space-sm);
  }

  .differentiator {
    padding: 32px 0;
  }

  .differentiator .container {
    margin-bottom: 16px;
  }

  .hero-panels-inner {
    gap: 14px;
    padding: 0 var(--hi-space-sm);
  }

  .hero-panel-content {
    padding: 16px;
  }

  .hero-panel-title {
    font-size: var(--hi-text-base);
  }

  .hero-panel-content p,
  .hero-panel-outcome {
    font-size: var(--hi-text-sm);
  }

  .hero-panel-img {
    max-height: 140px;
  }

  .about-teaser .container {
    padding: 24px 20px;
  }

  .detail-hero {
    min-height: 30vh;
  }

  .detail-body .container-narrow,
  .detail-body .container {
    padding-left: var(--hi-space-sm);
    padding-right: var(--hi-space-sm);
  }
}