/* ==========================================================================
   Narrative Landing Page
   Story-driven variant based on Johan's design sketch.
   Uses longevity tokens; this file only adds layout-specific rules.
   ========================================================================== */

/* ---------- Hero ---------- */

.narrative-hero {
  min-height: 100vh;
  margin-top: -4.5rem;
  padding-top: 4.5rem;
  position: relative;
  overflow: hidden;
  background: var(--color-surface);
  display: flex;
  align-items: center;
}

.narrative-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    var(--color-surface) 0%,
    var(--color-surface) 42%,
    rgba(250, 251, 251, 0.7) 58%,
    rgba(250, 251, 251, 0) 100%
  );
  z-index: 1;
}

.narrative-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.narrative-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 60% 34%; /* fallback; JS overrides to center head in free space */
}

.narrative-hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--section-xl) var(--space-6) var(--section-xl);
}

.narrative-hero-text {
  max-width: 540px;
}

.narrative-hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-5);
}

.narrative-hero h1 em {
  font-style: italic;
  color: var(--color-primary);
}

.narrative-hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.72;
  margin-bottom: var(--space-8);
  max-width: 480px;
}

.narrative-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-lightest);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 6px var(--space-4);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-6);
}

.narrative-hero-tag-dot {
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

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

.narrative-hero-trust {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-top: var(--space-8);
  flex-wrap: wrap;
}

.narrative-trust-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: var(--text-xs);
  color: var(--color-text-dim);
}

.narrative-trust-check {
  width: 18px;
  height: 18px;
  background: var(--color-lightest);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.narrative-trust-sep {
  width: 1px;
  height: 18px;
  background: var(--color-border);
}

/* Hero logo bar */
.narrative-logo-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3;
  border-top: 1px solid var(--color-border);
  padding: var(--space-5) var(--space-6);
  background: rgba(250, 251, 251, 0.6);
  backdrop-filter: blur(8px);
}

.narrative-logo-bar-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.narrative-logo-bar-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.narrative-logo-bar-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.narrative-logo-bar-logos img {
  height: 20px;
  width: auto;
  opacity: 0.4;
}

/* ---------- Biology story ---------- */

.narrative-story {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  text-align: center;
}

.narrative-story h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-5);
}

.narrative-story h2 em {
  font-style: italic;
  color: var(--color-primary);
}

.narrative-story-lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.75;
  max-width: 520px;
  margin: 0 auto;
}

.narrative-story-lead p + p {
  margin-top: var(--space-3);
}

.narrative-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-6) 0;
}

.narrative-connector-line {
  width: 1.5px;
  height: 32px;
  background: linear-gradient(to bottom, var(--color-light), var(--color-primary));
  border-radius: 1px;
}

/* ---------- Systems grid (4 col) ---------- */

.narrative-systems-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.narrative-sys-card {
  background: var(--color-surface-card);
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-6) var(--space-5);
  transition: border-color var(--duration-normal) var(--ease-default),
              box-shadow var(--duration-normal) var(--ease-default),
              transform var(--duration-normal) var(--ease-default);
}

.narrative-sys-card:hover {
  border-color: var(--color-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.narrative-sys-card h3 {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.narrative-sys-card p {
  font-size: var(--text-sm);
  color: var(--color-text-dim);
  line-height: 1.55;
}

/* ---------- Features (flat editorial grid) ---------- */

.narrative-feat-header {
  max-width: 620px;
  margin-bottom: var(--space-12);
}

.narrative-feat-header h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.narrative-feat-header h2 em {
  font-style: italic;
  color: var(--color-primary);
}

.narrative-feat-lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-top: var(--space-4);
}

.narrative-feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.narrative-fc {
  padding: var(--space-8) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
  border-right: 1px solid var(--color-border-light);
}

/* Remove right border on every 3rd item (end of row) */
.narrative-fc:nth-child(3n) {
  border-right: none;
}

/* Remove bottom border on last row */
.narrative-fc:nth-last-child(-n+3) {
  border-bottom: none;
}

.narrative-fc-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  font-size: 1.3rem;
  background: var(--color-lightest);
}

.narrative-fc-sub {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.narrative-fc-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.narrative-fc-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ---------- Example insights ---------- */

.narrative-ex-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-12);
}

.narrative-ex-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: border-color var(--duration-fast) var(--ease-default),
              background var(--duration-fast) var(--ease-default);
}

.narrative-ex-item:hover {
  border-color: var(--color-light);
  background: var(--color-lightest);
}

.narrative-ex-ico {
  width: 34px;
  height: 34px;
  background: var(--color-lightest);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  transition: background var(--duration-fast) var(--ease-default);
}

.narrative-ex-item:hover .narrative-ex-ico {
  background: var(--color-light);
}

.narrative-ex-q {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.narrative-ex-a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---------- Steps (4 col) ---------- */

.narrative-steps {
  max-width: var(--max-width);
  margin: var(--section-md) auto 0;
  padding: 0 var(--space-6);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.narrative-steps::before {
  content: '';
  position: absolute;
  top: 35px;
  left: calc(12.5% + 4px);
  right: calc(12.5% + 4px);
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-light) 0,
    var(--color-light) 8px,
    transparent 8px,
    transparent 20px
  );
}

.narrative-step {
  padding-right: var(--space-5);
}

.narrative-step-circ {
  width: 70px;
  height: 70px;
  background: var(--color-surface-card);
  border: 2px solid var(--color-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  position: relative;
  z-index: 1;
  transition: border-color var(--duration-normal) var(--ease-default),
              background var(--duration-normal) var(--ease-default);
}

.narrative-step:hover .narrative-step-circ {
  border-color: var(--color-primary);
  background: var(--color-lightest);
}

.narrative-step-n {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  font-weight: 700;
}

.narrative-step-title {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.narrative-step-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Payoff step (step 4) — visually distinct */
.narrative-step.payoff .narrative-step-circ {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.narrative-step.payoff .narrative-step-n {
  color: #fff;
}

.narrative-step.payoff:hover .narrative-step-circ {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

/* ---------- Trust (numbered editorial grid) ---------- */

.narrative-trust-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  max-width: 860px;
  margin: 0 auto;
}

.narrative-trust-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  padding: var(--space-8) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
  border-right: 1px solid var(--color-border-light);
}

/* Remove right border on even items (end of row) */
.narrative-trust-item:nth-child(2n) {
  border-right: none;
}

/* Remove bottom border on last row */
.narrative-trust-item:nth-last-child(-n+2) {
  border-bottom: none;
}

.narrative-trust-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  flex-shrink: 0;
  min-width: 32px;
}

.narrative-trust-item-title {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.narrative-trust-item-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ---------- Scroll reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .narrative-systems-grid { grid-template-columns: 1fr 1fr; }
  .narrative-feat-grid { grid-template-columns: 1fr; }
  .narrative-fc { border-right: none; }
  .narrative-fc:last-child { border-bottom: none; }
  .narrative-steps { grid-template-columns: 1fr 1fr; row-gap: var(--space-8); }
  .narrative-steps::before { display: none; }
  .narrative-trust-grid { grid-template-columns: 1fr; }
  .narrative-trust-item { border-right: none; }
  .narrative-trust-item:last-child { border-bottom: none; }
}

@media (max-width: 600px) {
  .narrative-hero-text { max-width: 100%; }
  .narrative-hero h1 { font-size: var(--text-3xl); }
  .narrative-systems-grid { grid-template-columns: 1fr; }
  .narrative-steps { grid-template-columns: 1fr; }
  .narrative-logo-bar-logos { gap: var(--space-4); }
}