/* hai-lab Landing Page — page-specific layout on top of colors_and_type.css */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
button { font: inherit; border: none; background: none; cursor: pointer; color: inherit; }

.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }
.container-narrow { max-width: 920px; margin: 0 auto; padding: 0 32px; }

/* ===== Reveal animations ============================================== */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  filter: blur(8px);
  transition: opacity 900ms var(--ease-standard),
              transform 900ms var(--ease-standard),
              filter 900ms var(--ease-standard);
}
.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}
.reveal-line { display: block; overflow: hidden; }
.reveal-line > span {
  display: inline-block;
  transform: translateY(110%);
  opacity: 0;
  transition: transform 900ms var(--ease-standard), opacity 900ms var(--ease-standard);
}
.reveal-line.is-in > span { transform: translateY(0); opacity: 1; }

/* stagger via inline --d (delay in ms) */
.reveal[style*="--d"], .reveal-line[style*="--d"] { transition-delay: var(--d); }
.reveal-line[style*="--d"] > span { transition-delay: var(--d); }

/* ===== NAV ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(247, 243, 238, 0.74);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--ease-standard), background 200ms var(--ease-standard);
}
.nav.is-scrolled { border-bottom-color: var(--border); }
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 32px;
}
.nav__logo img { height: 26px; }
.nav__links {
  display: flex; gap: 28px; align-items: center;
  font-size: 14px;
}
.nav__link {
  color: var(--fg); text-decoration: none; font-weight: 500;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size 220ms var(--ease-hover);
  padding-bottom: 2px;
}
.nav__link:hover { background-size: 100% 1px; }
.nav__cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius-pill);
  background: var(--hai-graphite); color: var(--hai-off-white);
  font-size: 14px; font-weight: 500; text-decoration: none;
  transition: background var(--dur-hover) var(--ease-hover), transform var(--dur-hover) var(--ease-hover);
}
.nav__cta:hover { background: var(--hai-graphite-80); transform: translateY(-1px); }

/* ===== HERO =========================================================== */
.hero {
  position: relative; overflow: hidden;
  padding: 88px 0 128px;
}
.hero__arc-sand,
.hero__arc-aqua,
.hero__arc-coral {
  position: absolute; pointer-events: none;
  border-radius: 50%;
  will-change: transform;
}
.hero__arc-sand {
  display: none;
}
.hero__arc-aqua {
  width: 380px; height: 380px;
  left: -120px; bottom: -160px;
  background: rgba(71, 199, 198, 0.14);
  filter: blur(60px);
}
.hero__arc-coral {
  width: 8px; height: 8px;
  background: var(--hai-coral);
  right: 12%; top: 32%;
  box-shadow: 0 0 0 6px rgba(217,87,58,0.16);
}

.hero__inner { position: relative; z-index: 2; max-width: 880px; }
.hero__eyebrow {
  margin-bottom: 36px;
  display: inline-flex; align-items: center; gap: 10px;
}
.hero__eyebrow::before {
  content: ""; width: 6px; height: 6px;
  border-radius: 50%; background: var(--hai-coral);
  animation: pulse 2.4s var(--ease-standard) infinite;
}
@keyframes pulse { 50% { opacity: 0.35; transform: scale(0.85); } }

.hero h1 {
  font-size: clamp(44px, 6.6vw, 92px);
  font-weight: 700;
  font-stretch: 118%;
  letter-spacing: -0.04em;
  line-height: 0.98;
  margin: 0 0 32px;
}
.hero h1 .dot { color: var(--hai-coral); }
.hero h1 .row { display: block; }

.hero__lede {
  font-size: clamp(18px, 1.55vw, 22px);
  line-height: 1.5; max-width: 56ch;
  color: var(--fg-muted);
  margin: 0 0 40px;
}
.hero__cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.hero__meta {
  margin-top: 80px;
  display: flex; gap: 48px; flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
}
.hero__meta-item { display: flex; align-items: baseline; gap: 10px; }
.hero__meta-item strong {
  font-weight: 500;
  color: var(--fg);
  font-size: 22px;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

/* ===== Generic section ================================================ */
.section { padding: 120px 0; position: relative; }
.section--stone,
.section--sand { background: var(--hai-stone); }
.section--ocean { background: var(--hai-ocean); color: var(--hai-off-white); }
.section--graphite { background: var(--hai-graphite); color: var(--hai-off-white); }
.section--off-warm { background: linear-gradient(180deg, var(--hai-off-white) 0%, var(--hai-stone-soft) 100%); }

.section-head {
  display: flex; justify-content: space-between; align-items: flex-end;
  gap: 40px; margin-bottom: 64px; flex-wrap: wrap;
}
.section-head__title { max-width: 22ch; }
.section-head h2 {
  font-size: clamp(34px, 4.4vw, 60px);
  letter-spacing: -0.03em;
  line-height: 1.02;
  font-weight: 700;
  font-stretch: 115%;
  margin: 16px 0 0;
  text-wrap: balance;
}
.section-head__lede {
  max-width: 44ch; color: var(--fg-muted);
  font-size: 17px; line-height: 1.55; margin: 0;
  align-self: flex-end;
}
.section--ocean .section-head__lede,
.section--graphite .section-head__lede { color: rgba(247,243,238,0.7); }

/* ===== Buttons (extend tokens) ======================================== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 16px 26px; border-radius: var(--radius-pill);
  background: var(--hai-graphite); color: var(--hai-off-white);
  font: 500 16px/1 var(--font-sans);
  letter-spacing: -0.005em;
  border: 1px solid transparent; cursor: pointer; text-decoration: none;
  transition: background var(--dur-hover) var(--ease-hover),
              transform var(--dur-hover) var(--ease-hover),
              box-shadow var(--dur-hover) var(--ease-hover);
}
.btn:hover { background: var(--hai-graphite-80); transform: translateY(-1px); box-shadow: 0 12px 28px rgba(18,59,82,0.16); }
.btn:hover .arrow { transform: translateX(4px); }
.btn:active { transform: translateY(1px); }
.btn--ghost { background: transparent; color: var(--hai-graphite); border-color: var(--border-strong); }
.btn--ghost:hover { background: var(--hai-graphite); color: var(--hai-off-white); border-color: var(--hai-graphite); }
.btn--ocean { background: var(--hai-ocean); }
.btn--ocean:hover { background: var(--hai-ocean-deep); }
.btn--coral { background: var(--hai-coral); color: #fff; }
.btn--coral:hover { background: var(--hai-coral-deep); }
.btn .arrow { font-family: var(--font-mono); font-weight: 400; transition: transform var(--dur-hover) var(--ease-hover); }

.btn-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 500; color: var(--fg); text-decoration: none;
  font-size: 15px;
}
.btn-link .arrow { font-family: var(--font-mono); transition: transform var(--dur-hover) var(--ease-hover); }
.btn-link:hover .arrow { transform: translateX(4px); }
.btn-link:hover { color: var(--hai-coral-deep); }

/* ===== QUICK CHECK section =========================================== */
.qc {
  position: relative; overflow: hidden;
  padding: 120px 0 140px;
  background: var(--hai-graphite);
  color: var(--hai-off-white);
}
.qc::before {
  content: ""; position: absolute; pointer-events: none;
  width: 900px; height: 900px;
  border-radius: 50%;
  background: var(--hai-ocean);
  left: -360px; top: -300px;
  opacity: 0.55;
  filter: blur(20px);
  z-index: 0;
  animation: qc-drift-a 38s ease-in-out infinite alternate;
}
.qc::after {
  content: ""; position: absolute; pointer-events: none;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: rgba(71, 199, 198, 0.28);
  filter: blur(80px);
  right: 6%; bottom: 8%;
  z-index: 0;
  animation: qc-drift-b 32s ease-in-out infinite alternate;
}
.qc-glow {
  position: absolute; pointer-events: none;
  border-radius: 50%;
  z-index: 0;
}
.qc-glow--coral {
  width: 380px; height: 380px;
  background: rgba(217,87,58,0.16);
  filter: blur(90px);
  right: 22%; top: -120px;
  animation: qc-drift-c 26s ease-in-out infinite alternate;
}
.qc-glow--aqua {
  width: 260px; height: 260px;
  background: rgba(71, 199, 198, 0.22);
  filter: blur(70px);
  left: 28%; bottom: -120px;
  animation: qc-drift-d 34s ease-in-out infinite alternate;
}
.qc .eyebrow { color: var(--hai-aqua); }
.qc__intro p { color: rgba(247,243,238,0.7); }
.qc__inner { position: relative; z-index: 2; }
@keyframes qc-drift-a {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(120px, 80px, 0) scale(1.08); }
}
@keyframes qc-drift-b {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-80px, -60px, 0) scale(1.12); }
}
@keyframes qc-drift-c {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-160px, 100px, 0) scale(1.15); }
}
@keyframes qc-drift-d {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(140px, -90px, 0) scale(0.92); }
}
@media (prefers-reduced-motion: reduce) {
  .qc::before, .qc::after, .qc-glow { animation: none; }
}

.qc__intro {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; align-items: end;
  margin-bottom: 48px;
}
.qc__intro h2 {
  font-size: clamp(36px, 4.6vw, 64px);
  letter-spacing: -0.03em;
  line-height: 1.02;
  font-weight: 700;
  font-stretch: 115%;
  margin: 16px 0 0;
  max-width: 16ch;
}
.qc__intro h2 em {
  font-style: normal; color: var(--hai-coral);
}
.qc__intro p {
  font-size: 17px; line-height: 1.6;
  color: var(--fg-muted);
  max-width: 44ch;
}

/* Quick Check card — light glass on dark */
.qc-card {
  position: relative;
  background: rgba(247, 243, 238, 0.06);
  border: 1px solid rgba(247, 243, 238, 0.14);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  border-radius: 32px;
  padding: 48px;
  overflow: hidden;
  color: var(--hai-off-white);
}
.qc-card__head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px dashed rgba(247,243,238,0.18);
}
.qc-card__title { color: rgba(247,243,238,0.6); }
.qc-card__title::before { background: var(--hai-aqua); }
.qc-card__steps { color: rgba(247,243,238,0.4); }
.qc-card__steps span.is-active { color: var(--hai-off-white); }
.qc-card__steps span.is-done { color: var(--hai-aqua); }

.qc-input-wrap {
  background: rgba(247,243,238,0.08);
  border-color: rgba(247,243,238,0.18);
}
.qc-input-wrap:focus-within {
  border-color: var(--hai-aqua);
  box-shadow: 0 0 0 3px rgba(217,233,232,0.13);
}
.qc-input { color: var(--hai-off-white); }
.qc-input::placeholder { color: rgba(247,243,238,0.4); }
.qc-input-prefix { color: rgba(247,243,238,0.5); border-right-color: rgba(247,243,238,0.18); }
.qc-submit { background: var(--hai-aqua); color: var(--hai-graphite); }
.qc-submit:hover { background: #fff; }

.qc-helper { color: rgba(247,243,238,0.45); }

.qc-step { background: rgba(247,243,238,0.05); border-color: rgba(247,243,238,0.1); }
.qc-step.is-active { background: rgba(217,233,232,0.10); border-color: rgba(217,233,232,0.34); }
.qc-step__index { color: rgba(247,243,238,0.45); }
.qc-step__status { color: rgba(247,243,238,0.45); }

.qc-cat { background: rgba(247,243,238,0.05); border-color: rgba(247,243,238,0.12); color: var(--hai-off-white); }
.qc-cat__hint { color: rgba(247,243,238,0.5); }
.qc-cat__bar { background: rgba(247,243,238,0.12); }

/* Bridge stays dark on dark; lift it to ocean variant for contrast */
.qc .qc-bridge { background: var(--hai-ocean); border: 1px solid rgba(217,233,232,0.22); }
.qc-card__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
  display: flex; align-items: center; gap: 10px;
}
.qc-card__title::before {
  content: ""; width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--hai-aqua);
}
.qc-card__steps {
  display: flex; gap: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-subtle);
}
.qc-card__steps span.is-active { color: var(--fg); }
.qc-card__steps span.is-done { color: var(--hai-aqua-deep); }

.qc-form {
  display: flex; gap: 12px; flex-wrap: wrap; align-items: stretch;
}
.qc-input-wrap {
  flex: 1; min-width: 280px;
  position: relative;
  display: flex; align-items: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 4px 4px 4px 24px;
  transition: border-color 200ms var(--ease-hover), box-shadow 200ms var(--ease-hover);
}
.qc-input-wrap:focus-within {
  border-color: var(--hai-ocean);
  box-shadow: 0 0 0 3px rgba(18, 59, 82, 0.08);
}
.qc-input-prefix {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-subtle);
  padding-right: 6px;
  border-right: 1px solid var(--border);
  margin-right: 12px;
}
.qc-input {
  flex: 1; border: none; outline: none;
  background: transparent;
  font: 500 16px/1 var(--font-sans);
  padding: 14px 0;
  color: var(--fg);
  min-width: 0;
}
.qc-input::placeholder { color: var(--fg-subtle); font-weight: 400; }
.qc-submit {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 22px;
  background: var(--hai-graphite);
  color: var(--hai-off-white);
  border-radius: var(--radius-pill);
  font: 500 15px/1 var(--font-sans);
  cursor: pointer;
  transition: background 200ms var(--ease-hover), transform 200ms var(--ease-hover);
}
.qc-submit:hover { background: var(--hai-graphite-80); transform: translateY(-1px); }
.qc-submit:disabled { opacity: 0.5; cursor: wait; transform: none; }
.qc-submit .arrow { font-family: var(--font-mono); transition: transform 200ms var(--ease-hover); }
.qc-submit:hover .arrow { transform: translateX(3px); }

.qc-helper {
  display: flex; gap: 24px; flex-wrap: wrap;
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-subtle);
}
.qc-helper span { display: inline-flex; align-items: center; gap: 6px; }
.qc-helper span::before {
  content: ""; width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--hai-aqua);
}

/* Quick Check loading */
.qc-loading {
  margin-top: 0;
  display: flex; flex-direction: column; gap: 14px;
}
.qc-step {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 20px;
  background: rgba(255,255,255,0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  opacity: 0.4;
  transition: opacity 400ms var(--ease-standard), background 400ms var(--ease-standard);
}
.qc-step.is-active {
  opacity: 1;
  background: rgba(71, 199, 198, 0.08);
  border-color: rgba(71, 199, 198, 0.32);
}
.qc-step.is-done { opacity: 1; }
.qc-step__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  color: var(--fg-subtle);
  width: 36px;
}
.qc-step__label {
  flex: 1;
  font-size: 15px;
  font-weight: 500;
}
.qc-step__status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-subtle);
  display: inline-flex; align-items: center; gap: 8px;
}
.qc-step.is-active .qc-step__status { color: var(--hai-aqua-deep); }
.qc-step.is-done .qc-step__status { color: var(--status-success); }
.qc-step__spinner {
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 1.5px solid rgba(71, 199, 198, 0.25);
  border-top-color: var(--hai-aqua-deep);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.qc-step__check {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--status-success);
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-size: 9px;
}

/* Quick Check result */
.qc-result {
  display: grid; grid-template-columns: 320px 1fr;
  gap: 32px;
  margin-top: 0;
}
.qc-score {
  background: var(--hai-graphite);
  color: var(--hai-off-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex; flex-direction: column; gap: 16px;
  position: relative;
  overflow: hidden;
}
.qc-score::before {
  content: ""; position: absolute;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: rgba(217,233,232,0.16);
  filter: blur(40px);
  right: -60px; top: -80px;
}
.qc-score__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: rgba(247,243,238,0.55);
  position: relative;
}
.qc-score__url {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--hai-aqua);
  word-break: break-all;
  position: relative;
}
.qc-score__num {
  font-family: var(--font-mono);
  font-size: 88px;
  line-height: 1;
  font-weight: 500;
  letter-spacing: -0.04em;
  position: relative;
  display: flex; align-items: baseline; gap: 4px;
}
.qc-score__num small {
  font-size: 24px;
  color: rgba(247,243,238,0.4);
  font-weight: 400;
}
.qc-score__verdict {
  font-size: 16px;
  line-height: 1.45;
  color: rgba(247,243,238,0.78);
  position: relative;
  margin: 0;
}
.qc-score__bar {
  position: relative;
  height: 4px;
  background: rgba(247,243,238,0.12);
  border-radius: 2px;
  overflow: hidden;
}
.qc-score__bar::after {
  content: ""; position: absolute; inset: 0 auto 0 0;
  width: var(--w, 0%);
  background: linear-gradient(90deg, var(--hai-coral) 0%, var(--hai-aqua) 100%);
  border-radius: 2px;
  transition: width 1.4s var(--ease-standard);
}

.qc-categories {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.qc-cat {
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  display: flex; flex-direction: column; gap: 12px;
  position: relative;
}
.qc-cat__head {
  display: flex; justify-content: space-between; align-items: baseline;
}
.qc-cat__name {
  font-size: 15px; font-weight: 600;
}
.qc-cat__num {
  font-family: var(--font-mono);
  font-size: 18px; font-weight: 500;
  letter-spacing: -0.02em;
}
.qc-cat__num.is-low { color: var(--hai-coral-deep); }
.qc-cat__num.is-mid { color: var(--status-warning); }
.qc-cat__num.is-high { color: var(--status-success); }
.qc-cat__bar {
  height: 3px; background: var(--hai-graphite-10);
  border-radius: 2px; overflow: hidden;
}
.qc-cat__bar > div {
  height: 100%;
  background: var(--hai-graphite);
  border-radius: 2px;
  width: var(--w, 0%);
  transition: width 1.2s var(--ease-standard);
}
.qc-cat.is-low .qc-cat__bar > div { background: var(--hai-coral); }
.qc-cat.is-mid .qc-cat__bar > div { background: var(--status-warning); }
.qc-cat.is-high .qc-cat__bar > div { background: var(--status-success); }
.qc-cat__hint {
  font-size: 12px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  letter-spacing: var(--ls-mono);
  margin: 0;
}

/* Academy bridge */
.qc-bridge {
  margin-top: 32px;
  padding: 28px 32px;
  display: flex; gap: 24px;
  align-items: center; flex-wrap: wrap;
  background: var(--hai-ocean);
  color: var(--hai-off-white);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.qc-bridge::before {
  content: ""; position: absolute;
  width: 280px; height: 280px;
  border-radius: 50%;
  background: rgba(71, 199, 198, 0.22);
  filter: blur(60px);
  right: -80px; top: -100px;
}
.qc-bridge__icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: rgba(217,233,232,0.16);
  border: 1px solid rgba(71, 199, 198, 0.4);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--hai-aqua);
  flex-shrink: 0;
  position: relative;
}
.qc-bridge__body { flex: 1; min-width: 240px; position: relative; }
.qc-bridge__eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--hai-aqua);
  margin-bottom: 6px;
}
.qc-bridge h4 {
  font-size: 22px;
  letter-spacing: -0.015em;
  line-height: 1.2;
  font-weight: 600;
  margin: 0 0 6px;
}
.qc-bridge p {
  font-size: 14px;
  color: rgba(247,243,238,0.7);
  margin: 0;
  max-width: 56ch;
}
.qc-bridge__cta {
  position: relative;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px;
  background: var(--hai-aqua);
  color: var(--hai-graphite);
  border-radius: var(--radius-pill);
  text-decoration: none;
  font: 500 14px/1 var(--font-sans);
  flex-shrink: 0;
  transition: background 200ms var(--ease-hover), transform 200ms var(--ease-hover);
}
.qc-bridge__cta:hover { background: #fff; transform: translateY(-1px); }
.qc-bridge__cta .arrow { font-family: var(--font-mono); transition: transform 200ms var(--ease-hover); }
.qc-bridge__cta:hover .arrow { transform: translateX(4px); }

/* Reset button */
.qc-reset {
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.qc-reset:hover { color: var(--fg); }

/* Quick Check VARIANTS */
/* Variant: minimal — strips card, places input inline as a "search bar" */
.qc[data-variant="minimal"] .qc-card {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  backdrop-filter: none;
}
.qc[data-variant="minimal"] .qc-card__head { display: none; }
.qc[data-variant="minimal"] .qc-input-wrap {
  background: rgba(247,243,238,0.08);
  border: 1.5px solid var(--hai-off-white);
  padding: 8px 8px 8px 28px;
}
.qc[data-variant="minimal"] .qc-submit { padding: 16px 26px; font-size: 16px; }

/* Variant: split — input on left, live preview/animation panel on right */
.qc[data-variant="split"] .qc-card {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 0;
  padding: 0;
  align-items: stretch;
}
.qc[data-variant="split"] .qc-card__head { display: none; }
.qc[data-variant="split"] .qc-card__main {
  padding: 48px;
}
.qc[data-variant="split"] .qc-card__side {
  background: var(--hai-graphite);
  color: var(--hai-off-white);
  border-radius: 0 32px 32px 0;
  padding: 40px;
  position: relative;
  overflow: hidden;
  display: flex; flex-direction: column; justify-content: center;
}
.qc[data-variant="split"] .qc-card__side::before {
  content: ""; position: absolute;
  width: 360px; height: 360px;
  border-radius: 50%;
  background: rgba(217,233,232,0.13);
  filter: blur(60px);
  right: -120px; top: -120px;
}
.qc-side-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--hai-aqua);
  margin-bottom: 16px;
  position: relative;
}
.qc-side-bullets {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 14px;
  position: relative;
}
.qc-side-bullets li {
  display: flex; gap: 12px;
  font-size: 14px;
  color: rgba(247,243,238,0.78);
  line-height: 1.5;
}
.qc-side-bullets li::before {
  content: ""; width: 6px; height: 6px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--hai-aqua);
  flex-shrink: 0;
}
/* Default variant uses the primary block; hide the side */
.qc:not([data-variant="split"]) .qc-card__side { display: none; }
.qc:not([data-variant="split"]) .qc-card__main { display: contents; }

/* ===== WORKFLOW (Human-Assisted glass card) =========================== */
.workflow {
  padding: 130px 0;
  background: var(--hai-off-white);
  position: relative;
  overflow: hidden;
}
.workflow::before {
  content: ""; position: absolute;
  width: 700px; height: 700px;
  border-radius: 50%;
  background: var(--hai-stone);
  opacity: 0.5;
  right: -200px; top: 100px;
  filter: blur(40px);
}

.workflow__head {
  text-align: left;
  max-width: 760px;
  margin: 0 0 64px;
  position: relative;
}
.workflow__head .eyebrow { display: block; margin-bottom: 18px; }
.workflow__head h2 {
  font-size: clamp(34px, 4.4vw, 56px);
  letter-spacing: -0.03em;
  line-height: 1.04;
  font-weight: 700;
  font-stretch: 115%;
  margin: 0 0 20px;
  text-wrap: balance;
}
.workflow__head h2 em {
  font-style: normal; color: var(--hai-coral);
}
.workflow__head p {
  font-size: 17px; line-height: 1.6;
  color: var(--fg-muted);
  max-width: 56ch;
}

.wf-card {
  position: relative;
  background: rgba(247, 243, 238, 0.72);
  border: 1px solid rgba(18, 59, 82, 0.10);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 24px 80px rgba(17, 17, 17, 0.06);
  border-radius: 32px;
  padding: 40px;
  overflow: hidden;
}
.wf-card__topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 20px;
  margin-bottom: 36px;
  border-bottom: 1px dashed rgba(18,59,82,0.18);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
}
.wf-card__topbar .badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  background: rgba(255, 122, 92, 0.12);
  border: 1px solid rgba(255, 122, 92, 0.4);
  border-radius: var(--radius-pill);
  color: var(--hai-coral-deep);
}
.wf-card__topbar .badge::before {
  content: ""; width: 6px; height: 6px;
  border-radius: 50%; background: var(--hai-coral);
}

.wf-flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  align-items: stretch;
  position: relative;
}
.wf-step {
  padding: 20px 16px;
  display: flex; flex-direction: column; gap: 12px;
  position: relative;
  border-radius: var(--radius-md);
  transition: background 600ms var(--ease-standard);
}
.wf-step.is-active {
  background: rgba(71, 199, 198, 0.06);
}
.wf-step__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-subtle);
  display: flex; align-items: center; gap: 8px;
}
.wf-step__index .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--hai-graphite-20);
  transition: background 400ms var(--ease-standard), box-shadow 400ms var(--ease-standard);
}
.wf-step.is-active .wf-step__index .dot {
  background: var(--hai-aqua);
  box-shadow: 0 0 0 4px rgba(46,125,123,0.18);
}
.wf-step.is-done .wf-step__index .dot {
  background: var(--hai-aqua-deep);
}
.wf-step.is-human .wf-step__index .dot {
  background: var(--hai-coral);
  box-shadow: 0 0 0 4px rgba(255, 122, 92, 0.2);
}
.wf-step__title {
  font-size: 15px; font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.wf-step__body {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.5;
  margin: 0;
  font-family: var(--font-mono);
  letter-spacing: var(--ls-mono);
}
/* Connector lines */
.wf-step + .wf-step::before {
  content: "";
  position: absolute;
  left: -1px; top: 28px;
  width: 1px; height: calc(100% - 30px);
  background: var(--border);
}
@media (min-width: 900px) {
  .wf-step + .wf-step::before {
    left: -8px;
    top: 50%;
    width: 16px; height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--border-strong) 50%, transparent 100%);
  }
}

.wf-card__bottom {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px dashed rgba(18,59,82,0.18);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
}
.wf-card__bottom strong {
  display: block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 18px;
  color: var(--fg);
  letter-spacing: -0.01em;
  margin-top: 6px;
  text-transform: none;
}

/* ===== USE CASES ===================================================== */
.uc-section { padding: 130px 0; background: var(--hai-stone-soft); }

.uc-tabs {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.uc-tab {
  font-family: var(--font-sans);
  font-size: 14px; font-weight: 500;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg-muted);
  cursor: pointer;
  transition: all 200ms var(--ease-hover);
}
.uc-tab:hover { color: var(--fg); border-color: var(--border-strong); }
.uc-tab.is-active {
  background: var(--hai-graphite);
  color: var(--hai-off-white);
  border-color: var(--hai-graphite);
}
.uc-tab__count {
  font-family: var(--font-mono);
  font-size: 11px;
  margin-left: 8px;
  opacity: 0.55;
}

.uc-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 32px;
  align-items: start;
}
.uc-list { display: flex; flex-direction: column; gap: 12px; }
.uc-item {
  display: flex; gap: 18px; align-items: center;
  padding: 22px 24px;
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-align: left;
  transition: all 200ms var(--ease-hover);
  width: 100%;
}
.uc-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
  background: #fff;
}
.uc-item.is-active {
  background: #fff;
  border-color: var(--hai-graphite);
  box-shadow: var(--shadow-md);
}
.uc-item__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: var(--ls-wide);
  color: var(--fg-subtle);
  flex-shrink: 0;
  width: 36px;
}
.uc-item.is-active .uc-item__num { color: var(--hai-coral); }
.uc-item__body { flex: 1; min-width: 0; }
.uc-item__title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
}
.uc-item__hint {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.45;
  margin: 0;
}
.uc-item__arrow {
  font-family: var(--font-mono);
  color: var(--fg-subtle);
  transition: transform 200ms var(--ease-hover), color 200ms var(--ease-hover);
}
.uc-item:hover .uc-item__arrow,
.uc-item.is-active .uc-item__arrow {
  color: var(--fg);
  transform: translateX(4px);
}

/* Detail panel */
.uc-detail {
  position: sticky;
  top: 96px;
  background: var(--hai-graphite);
  color: var(--hai-off-white);
  border-radius: var(--radius-lg);
  padding: 36px;
  min-height: 540px;
  display: flex; flex-direction: column; gap: 20px;
  position: relative;
  overflow: hidden;
}
.uc-detail::before {
  content: ""; position: absolute;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: rgba(217,233,232,0.16);
  filter: blur(60px);
  right: -120px; top: -120px;
}
.uc-detail__top {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: rgba(247,243,238,0.5);
  position: relative;
}
.uc-detail__tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px;
  border: 1px solid rgba(71, 199, 198, 0.4);
  background: rgba(71, 199, 198, 0.1);
  color: var(--hai-aqua);
  border-radius: var(--radius-pill);
}
.uc-detail h3 {
  font-size: 30px;
  letter-spacing: -0.022em;
  line-height: 1.1;
  font-weight: 600;
  margin: 0;
  position: relative;
}
.uc-detail__lede {
  font-size: 15px;
  line-height: 1.55;
  color: rgba(247,243,238,0.7);
  margin: 0;
  position: relative;
}
.uc-detail__divider {
  height: 1px;
  background: rgba(247,243,238,0.12);
  position: relative;
}
.uc-detail__features {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 12px;
  position: relative;
}
.uc-detail__features li {
  display: flex; gap: 12px;
  font-size: 14px;
  line-height: 1.5;
  color: rgba(247,243,238,0.85);
}
.uc-detail__features li::before {
  content: "";
  width: 16px; height: 16px;
  flex-shrink: 0; margin-top: 3px;
  border-radius: 50%;
  background: rgba(71, 199, 198, 0.2);
  border: 1px solid var(--hai-aqua);
  background-image: linear-gradient(45deg, transparent 45%, var(--hai-aqua) 45%, var(--hai-aqua) 55%, transparent 55%);
}
.uc-detail__meta {
  margin-top: auto;
  display: flex; justify-content: space-between; align-items: end;
  flex-wrap: wrap; gap: 16px;
  position: relative;
}
.uc-detail__metric {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: rgba(247,243,238,0.5);
}
.uc-detail__metric strong {
  display: block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 22px;
  color: var(--hai-off-white);
  letter-spacing: -0.01em;
  margin-top: 6px;
  text-transform: none;
}
.uc-detail__cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px;
  background: var(--hai-aqua);
  color: var(--hai-graphite);
  border-radius: var(--radius-pill);
  font: 500 14px/1 var(--font-sans);
  text-decoration: none;
  transition: background 200ms var(--ease-hover), transform 200ms var(--ease-hover);
}
.uc-detail__cta:hover { background: #fff; transform: translateY(-1px); }
.uc-detail__cta .arrow { font-family: var(--font-mono); transition: transform 200ms var(--ease-hover); }
.uc-detail__cta:hover .arrow { transform: translateX(4px); }
.uc-detail__inner {
  display: flex; flex-direction: column; gap: 20px;
  position: relative; z-index: 1;
  flex: 1;
}

/* Detail switch animation */
.uc-detail__inner {
  animation: uc-fade-in 500ms var(--ease-standard);
}
@keyframes uc-fade-in {
  from { opacity: 0; transform: translateY(8px); filter: blur(4px); }
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

/* ===== RELEASES (blog) =============================================== */
.releases { padding: 130px 0; background: var(--hai-off-white); }
.releases__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 24px;
}
.release {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex; flex-direction: column; gap: 16px;
  text-decoration: none; color: inherit;
  position: relative;
  overflow: hidden;
  transition: all 220ms var(--ease-hover);
}
.release:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.release--featured {
  grid-row: span 2;
  background: var(--hai-graphite);
  color: var(--hai-off-white);
  border-color: var(--hai-graphite);
  padding: 40px;
}
.release--featured::before {
  content: ""; position: absolute;
  width: 360px; height: 360px;
  border-radius: 50%;
  background: rgba(217,233,232,0.16);
  filter: blur(60px);
  right: -100px; bottom: -120px;
}
.release__top {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-subtle);
  position: relative;
}
.release--featured .release__top { color: rgba(247,243,238,0.55); }
.release__tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  font-size: 10px;
}
.release__tag::before {
  content: ""; width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--hai-coral);
}
.release--featured .release__tag {
  border-color: rgba(71, 199, 198, 0.4);
  color: var(--hai-aqua);
}
.release--featured .release__tag::before { background: var(--hai-aqua); }
.release h3 {
  font-size: 22px;
  letter-spacing: -0.018em;
  line-height: 1.18;
  font-weight: 600;
  margin: 0;
  position: relative;
}
.release--featured h3 {
  font-size: 36px;
  letter-spacing: -0.025em;
  line-height: 1.06;
  font-weight: 700;
  margin: auto 0 0;
}
.release p {
  font-size: 14px;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 0;
  position: relative;
}
.release--featured p {
  font-size: 16px;
  color: rgba(247,243,238,0.7);
  max-width: 44ch;
}
.release__foot {
  margin-top: auto;
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
  position: relative;
}
.release--featured .release__foot {
  border-top-color: rgba(247,243,238,0.18);
  color: rgba(247,243,238,0.55);
}
.release__foot .arrow {
  color: var(--fg);
  transition: transform 200ms var(--ease-hover);
}
.release--featured .release__foot .arrow { color: var(--hai-aqua); }
.release:hover .release__foot .arrow { transform: translateX(4px); }

/* ===== FINAL CTA ===================================================== */
.cta-band {
  background: var(--hai-graphite);
  color: var(--hai-off-white);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.cta-band__arc {
  position: absolute;
  width: 800px; height: 800px;
  border-radius: 50%;
  background: var(--hai-graphite-80);
  right: -300px; top: -300px;
  opacity: 0.6;
}
.cta-band__arc--aqua {
  width: 280px; height: 280px;
  right: 20%; bottom: -120px;
  background: rgba(71, 199, 198, 0.25);
  filter: blur(60px);
  opacity: 1;
}
.cta-band__inner {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px; align-items: center;
}
.cta-band h2 {
  font-size: clamp(34px, 4.4vw, 60px);
  letter-spacing: -0.03em;
  line-height: 1.04;
  font-stretch: 115%;
  margin: 16px 0 0;
  max-width: 18ch;
  font-weight: 700;
}
.cta-band p {
  color: rgba(247,243,238,0.7);
  margin: 0;
  font-size: 17px;
  line-height: 1.55;
  max-width: 44ch;
}
.cta-band__actions { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.cta-band__actions .btn {
  background: var(--hai-off-white); color: var(--hai-graphite);
}
.cta-band__actions .btn:hover { background: var(--hai-aqua); color: var(--hai-graphite); }
.cta-band__actions .btn--ghost {
  background: transparent; color: var(--hai-off-white);
  border-color: rgba(247,243,238,0.3);
}
.cta-band__actions .btn--ghost:hover { background: rgba(247,243,238,0.1); color: var(--hai-off-white); border-color: rgba(247,243,238,0.5); }

/* ===== FOOTER ======================================================== */
.footer { background: var(--hai-off-white); padding: 72px 0 36px; border-top: 1px solid var(--border); }
.footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer h5 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
  margin: 0 0 18px;
  font-weight: 500;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer a {
  color: var(--fg);
  text-decoration: none;
  font-size: 14px;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size 200ms var(--ease-hover);
  padding-bottom: 1px;
}
.footer a:hover { background-size: 100% 1px; }
.footer__brand img { height: 28px; margin-bottom: 18px; }
.footer__brand p { font-size: 14px; color: var(--fg-muted); line-height: 1.55; max-width: 38ch; margin: 0; }
.footer__bottom {
  display: flex; justify-content: space-between; padding-top: 24px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
  flex-wrap: wrap; gap: 16px;
}

/* ===== RESPONSIVE =================================================== */
@media (max-width: 1100px) {
  .qc[data-variant="split"] .qc-card { grid-template-columns: 1fr; }
  .qc[data-variant="split"] .qc-card__side {
    border-radius: 0 0 32px 32px;
  }
}
@media (max-width: 900px) {
  .section { padding: 80px 0; }
  .qc { padding: 80px 0 100px; }
  .workflow { padding: 80px 0; }
  .uc-section, .releases { padding: 80px 0; }
  .qc-card, .wf-card { padding: 28px; border-radius: 24px; }
  .qc__intro { grid-template-columns: 1fr; gap: 16px; }
  .qc-result { grid-template-columns: 1fr; }
  .qc-categories { grid-template-columns: 1fr 1fr; }
  .uc-layout { grid-template-columns: 1fr; }
  .uc-detail { position: static; min-height: 0; }
  .wf-flow { grid-template-columns: 1fr; gap: 8px; }
  .wf-card__bottom { grid-template-columns: 1fr; gap: 16px; }
  .releases__grid { grid-template-columns: 1fr; }
  .release--featured { grid-row: auto; }
  .cta-band__inner { grid-template-columns: 1fr; gap: 32px; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .nav__links a:not(.nav__cta) { display: none; }
  .hero { padding: 64px 0 80px; }
  .hero__meta { gap: 24px; margin-top: 56px; }
}