/* ──────────────────────────────────────────────
 * Trustcast Atomic Primitives
 *
 * Decomposition layers (shipping today):
 *   1. Card primitive (.card-block + variants)
 *   2. Decision widgets (.gate-pill, .risk-line, .metric-tag,
 *      .timeline-step, .status-box, .approval-box)
 *   3. Layout modules (.split-decision, .three-up, .ledger,
 *      .proof-strip, .cta-frame)
 *
 * Layout modules below are utility-grade: a page composes
 * them with content, never duplicates them inline.
 * ────────────────────────────────────────────── */

/* ─── 1. Card primitive ─────────────────────────────── */

.card-block {
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--rule-medium);
  display: grid;
  gap: var(--space-3);
  align-content: start;
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.card-block .caption,
.card-block .card-eyebrow {
  color: var(--shu);
  font-family: var(--font-mono);
  font-size: var(--type-meta);
  letter-spacing: var(--ls-mono-meta);
  text-transform: uppercase;
}

.card-block h3,
.card-block .card-title {
  font-family: var(--font-display-jp);
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 700;
  letter-spacing: var(--ls-headline);
  line-height: 1.3;
  color: var(--ink);
}

.card-block p,
.card-block .card-body {
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* Variants */

.card-block--framed {
  border-color: var(--ink);
  background: var(--surface-strong);
}

.card-block--soft {
  background: rgba(250, 246, 237, 0.86);
  border-color: var(--rule-medium);
}

.card-block--ledger {
  padding: var(--space-4);
  background: var(--surface-strong);
  border-color: var(--rule-medium);
}

.card-block--inverse {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.card-block--inverse .caption,
.card-block--inverse .card-eyebrow {
  color: var(--gold);
}
.card-block--inverse h3,
.card-block--inverse .card-title {
  color: var(--paper);
}
.card-block--inverse p,
.card-block--inverse .card-body {
  color: rgba(245, 240, 230, 0.82);
}

.card-block--gate {
  border-color: var(--shu);
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-warm) 100%);
}

/* Lift modifier — opt-in hover. Apply to interactive cards only.
 * Default `.card-block` is calm (no hover transform) — Japanese B2B reads
 * decoration as noise. Use `.card-block--lift` only on links / clickable cards. */
.card-block--lift:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px -28px rgba(10, 22, 40, 0.28);
}

/* ─── 2. Decision widgets ─────────────────────────────── */

/* Gate pill — marks a human-approval boundary in a flow.
 * iter-10: weight bumped to 600 + Gold halo on dot (single +pop touch). */
.gate-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--shu);
  background: transparent;
  color: var(--shu);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: var(--ls-mono-meta);
  text-transform: uppercase;
}
.gate-pill::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--shu);
  box-shadow: 0 0 0 2px var(--gold);
  border-radius: 50%;
  display: inline-block;
}

/* Risk line — left rule with body, used to call attention to a condition */
.risk-line {
  border-left: 2px solid var(--shu);
  padding: 4px 0 4px 16px;
  display: grid;
  gap: 4px;
}
.risk-line .risk-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-mono-meta);
  text-transform: uppercase;
  color: var(--shu);
}
.risk-line .risk-text {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
}

/* Metric tag — number with context (unit, comparison) */
.metric-tag {
  display: inline-grid;
  gap: 4px;
  padding: 8px 12px;
  border: 1px solid var(--rule-medium);
  background: var(--surface);
  font-variant-numeric: tabular-nums;
}
.metric-tag .metric-value {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.metric-tag .metric-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--ls-mono-meta);
  text-transform: uppercase;
  color: var(--slate);
}

/* Timeline step — numbered step in a sequence */
.timeline-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--ink);
  align-items: baseline;
}
.timeline-step:last-child {
  border-bottom: 1px solid var(--ink);
}
.timeline-step .step-num {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: var(--ls-mono-meta);
  color: var(--shu);
}
.timeline-step .step-label {
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.6;
  color: var(--ink);
}

/* Status box — outcome label + description */
.status-box {
  padding: var(--space-4);
  background: var(--surface-strong);
  border: 1px solid var(--rule-medium);
  border-top: 2px solid var(--shu);
  display: grid;
  gap: 8px;
}
.status-box .status-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-mono-meta);
  text-transform: uppercase;
  color: var(--shu);
}
.status-box .status-value {
  font-family: var(--font-display-jp);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}
.status-box .status-note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

/* Approval box — explicit governance gate marker */
.approval-box {
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--ink);
  background: var(--surface-strong);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-3);
  align-items: center;
}
.approval-box .approval-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-mono-meta);
  text-transform: uppercase;
  color: var(--ink);
}
.approval-box .approval-name {
  font-family: var(--font-display-jp);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}
.approval-box .approval-state {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-mono-meta);
  text-transform: uppercase;
  color: var(--shu);
  border: 1px solid var(--shu);
  padding: 4px 10px;
}

/* ─── 3. Layout modules ─────────────────────────────── */

/* Split-decision — two-column "decision" layout used in heros and section heads */
.split-decision {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: end;
}
@media (min-width: 1024px) {
  .split-decision {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--space-7);
  }
}

/* Three-up — equal three-column card grid (responsive) */
.three-up {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 768px) {
  .three-up {
    grid-template-columns: repeat(3, 1fr);
  }
}

.two-up {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 1024px) {
  .two-up {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-7);
  }
}

/* Ledger — labelled rows for parameters / scope */
.ledger-block {
  display: grid;
  gap: 0;
  padding: var(--space-5);
  background: var(--surface-strong);
  border: 1px solid var(--rule-medium);
}

/* CTA frame — the "next step" frame at section ends */
.cta-frame {
  background: var(--ink);
  color: var(--paper);
  padding: var(--space-7);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
@media (min-width: 1024px) {
  .cta-frame {
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-8);
  }
}

/* Proof strip — wide, low-contrast row of three context anchors */
.proof-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--rule-medium);
  border-bottom: 1px solid var(--rule-medium);
}
@media (min-width: 768px) {
  .proof-strip {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
  }
}

/* ─── 4. Numeric & meta type helpers ─────────────────────────────── */

.numeric-emphasis {
  font-family: var(--font-display);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.025em;
  font-size: var(--type-numeric);
  color: var(--ink);
  line-height: 1;
}

/* Dopamine numeric — iter-10. 2px Shu underline that draws in on reveal.
 * Apply to the SINGLE hero KPI per page, not to every metric. */
.numeric-emphasis--dopamine {
  position: relative;
  padding-bottom: 6px;
}
.numeric-emphasis--dopamine::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--shu);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-medium) var(--ease-trust);
}
.numeric-emphasis--dopamine.is-in::after {
  transform: scaleX(1);
}

/* Caption-C — iter-10. Mono caption with 1px Shu underline.
 * Use on the KEY of a key/value pair (eyebrow, label).
 * Pair with .meta-value on the adjacent VALUE element. */
.caption-c,
.meta-key {
  font-family: var(--font-mono);
  font-size: var(--type-meta);
  letter-spacing: var(--ls-mono-meta);
  color: var(--shu);
  text-transform: uppercase;
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--shu);
  line-height: 1.3;
}
.meta-value {
  font-family: var(--font-mono);
  font-size: var(--type-meta);
  letter-spacing: var(--ls-mono-meta);
  color: var(--ink);
}

.meta-mono {
  font-family: var(--font-mono);
  font-size: var(--type-meta);
  letter-spacing: var(--ls-mono-meta);
  color: var(--slate);
  text-transform: uppercase;
}

.annotation-rule {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--rule-faint);
  align-items: baseline;
}
.annotation-rule:first-child {
  border-top: 0;
}