/* =============================================================================
   VERTEX DIMENSION — Components
   Reusable parts: buttons, metrics, panels, lists. Authored once, composed
   elsewhere.
   ========================================================================== */

/* --- Button: a precise rectangle, no radius, no glow ------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  padding: 0.95rem 1.6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-090);
  border: 1px solid var(--line-strong);
  background: transparent;
  transition: color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
}
.btn .arrow {
  transition: transform var(--dur-fast) var(--ease-out);
}
.btn:hover {
  background: var(--vd-white);
  color: var(--vd-black);
  border-color: var(--vd-white);
}
.btn:hover .arrow {
  transform: translateX(4px);
}
.btn--ghost {
  border-color: transparent;
  padding-inline: 0;
}
.btn--ghost:hover {
  background: transparent;
  color: var(--ink-100);
}
.btn--ghost:hover .arrow {
  transform: translateX(4px);
}

/* --- Tag / chip -------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.3rem 0.7rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-070);
  border: 1px solid var(--line-strong);
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* --- Eyebrow dot (a single vertex used as a marker) -------------------- */
.vertex-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--vd-white);
  flex: none;
}

/* =============================================================================
   Metric — large mono figure with caption (animated count-up)
   ========================================================================== */
.metric {
  padding-block: var(--space-5);
}
.metric__value {
  font-family: var(--font-mono);
  font-weight: var(--weight-light);
  font-size: clamp(2.4rem, 1.4rem + 3.4vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink-100);
  font-feature-settings: "tnum", "zero";
  display: flex;
  align-items: baseline;
  gap: 0.12em;
}
.metric__unit {
  font-size: 0.42em;
  color: var(--ink-050);
  letter-spacing: 0;
}
.metric__label {
  margin-top: var(--space-3);
  font-size: var(--fs-small);
  color: var(--ink-070);
  letter-spacing: 0;
}
.metric__sub {
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-035);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.metric-grid > .metric {
  background: var(--surface);
  padding: clamp(1.5rem, 1rem + 2vw, 2.6rem);
}
@media (min-width: 720px) {
  .metric-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* =============================================================================
   Dimension panels — the three business lines
   ========================================================================== */
.dimensions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line);
}
@media (min-width: 980px) {
  .dimensions {
    grid-template-columns: repeat(3, 1fr);
  }
}
.dimension {
  position: relative;
  background: var(--surface);
  padding: clamp(1.8rem, 1.2rem + 2.4vw, 3rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  min-height: clamp(360px, 30vw, 460px);
  overflow: hidden;
  transition: background var(--dur-mid) var(--ease-out);
}
.dimension:hover {
  background: var(--surface-raised);
}
.dimension__index {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--track-wide);
  color: var(--ink-035);
}
.dimension__roman {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 1.4rem + 2.6vw, 3.4rem);
  font-weight: var(--weight-thin);
  line-height: 1;
  color: var(--ink-020);
  letter-spacing: 0.05em;
  transition: color var(--dur-mid) var(--ease-out);
}
.dimension:hover .dimension__roman {
  color: var(--ink-050);
}
.dimension__title {
  font-size: var(--fs-h3);
  font-weight: var(--weight-light);
  color: var(--ink-100);
}
.dimension__en {
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-035);
}
.dimension__body {
  color: var(--ink-070);
  font-size: var(--fs-small);
  line-height: 1.6;
}
.dimension__sublabel {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-035);
}
.dimension__list {
  margin-top: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 0;
}
.dimension__list li {
  display: flex;
  align-items: center;
  gap: 0.7em;
  padding-block: 0.7rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-070);
}
.dimension__list li::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--ink-050);
  flex: none;
}

/* =============================================================================
   Axiom list — "The Method" (cold numbered steps)
   ========================================================================== */
.axioms {
  border-top: 1px solid var(--line);
}
.axiom {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: var(--space-4);
  padding-block: clamp(1.4rem, 1rem + 1.4vw, 2.2rem);
  border-bottom: 1px solid var(--line);
  align-items: baseline;
  transition: padding-left var(--dur-mid) var(--ease-out);
}
.axiom:hover {
  padding-left: var(--space-4);
}
@media (min-width: 760px) {
  .axiom {
    grid-template-columns: 6rem 1fr 1.1fr;
    gap: var(--space-6);
  }
}
.axiom__num {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--ink-035);
  letter-spacing: var(--track-wide);
}
.axiom__title {
  font-size: var(--fs-h3);
  font-weight: var(--weight-light);
  color: var(--ink-100);
}
.axiom__note {
  color: var(--ink-050);
  font-size: var(--fs-small);
  line-height: 1.55;
}

/* =============================================================================
   Ledger — edge / advantage list
   ========================================================================== */
.ledger {
  border-top: 1px solid var(--line);
}
.ledger__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding-block: clamp(1.3rem, 1rem + 1.2vw, 2rem);
  border-bottom: 1px solid var(--line);
}
@media (min-width: 760px) {
  .ledger__row {
    grid-template-columns: 0.6fr 1.4fr;
    gap: var(--space-6);
    align-items: baseline;
  }
}
.ledger__key {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-070);
  display: flex;
  align-items: center;
  gap: 0.7em;
}
.ledger__key .idx {
  color: var(--ink-020);
}
.ledger__val {
  color: var(--ink-090);
  font-size: var(--fs-lead);
  font-weight: var(--weight-light);
  line-height: 1.4;
}

/* =============================================================================
   Horizon list — frontier directions
   ========================================================================== */
.frontier {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (min-width: 640px) {
  .frontier { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1000px) {
  .frontier { grid-template-columns: repeat(3, 1fr); }
}
.frontier__cell {
  background: var(--surface);
  padding: clamp(1.4rem, 1rem + 1.6vw, 2.2rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 180px;
  transition: background var(--dur-fast) var(--ease-out);
}
.frontier__cell:hover {
  background: var(--surface-raised);
}
.frontier__coord {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  color: var(--ink-035);
}
.frontier__name {
  font-size: var(--fs-h3);
  font-weight: var(--weight-light);
  color: var(--ink-100);
}
.frontier__desc {
  margin-top: auto;
  font-size: var(--fs-small);
  color: var(--ink-050);
}

/* =============================================================================
   Definition pair (Vertex / Dimension etymology)
   ========================================================================== */
.defs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (min-width: 720px) {
  .defs { grid-template-columns: 1fr 1fr; }
}
.def {
  background: var(--surface);
  padding: clamp(1.8rem, 1.2rem + 2vw, 3rem);
}
.def__term {
  font-size: var(--fs-h2);
  font-weight: var(--weight-thin);
  color: var(--ink-100);
  letter-spacing: 0;
}
.def__pos {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-035);
  margin-top: 0.4rem;
}
.def__gloss {
  margin-top: var(--space-4);
  color: var(--ink-070);
  font-size: var(--fs-small);
  line-height: 1.6;
}

/* =============================================================================
   Architecture matrix — the integrated-platform spec table
   ========================================================================== */
.matrix-wrap {
  border: 1px solid var(--line);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.matrix {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}
.matrix th,
.matrix td {
  text-align: left;
  vertical-align: top;
  padding: clamp(1rem, 0.6rem + 1vw, 1.7rem);
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
}
.matrix th:last-child,
.matrix td:last-child {
  border-right: 0;
}
.matrix tbody tr:last-child th,
.matrix tbody tr:last-child td {
  border-bottom: 0;
}
.matrix thead th {
  border-bottom: 1px solid var(--line-strong);
}
.matrix__corner {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-035);
}
.matrix__roman {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  color: var(--ink-035);
}
.matrix__name {
  display: block;
  margin-top: 0.35rem;
  font-size: var(--fs-h3);
  font-weight: var(--weight-light);
  color: var(--ink-100);
}
.matrix__sub {
  display: block;
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-035);
}
.matrix tbody th {
  width: 16%;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: var(--weight-regular);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-050);
  white-space: nowrap;
}
.matrix tbody td {
  color: var(--ink-090);
  font-size: var(--fs-small);
  line-height: 1.5;
  max-width: 30ch;
}

.arch__note {
  margin-top: clamp(2rem, 3vw, 3rem);
  max-width: 72ch;
  color: var(--ink-070);
  font-size: var(--fs-lead);
  font-weight: var(--weight-light);
}

/* =============================================================================
   Closing band — the page's quiet last breath (statement + email only)
   ========================================================================== */
.closing {
  margin-top: clamp(3.5rem, 6vw, 6rem);
  padding-top: clamp(2rem, 3vw, 3rem);
  border-top: 1px solid var(--line-strong);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-5);
  flex-wrap: wrap;
}
.closing__line {
  font-size: clamp(1.3rem, 1rem + 1.4vw, 2.1rem);
  font-weight: var(--weight-thin);
  letter-spacing: var(--track-tight);
  color: var(--ink-070);
}
.closing__mail {
  font-family: var(--font-mono);
  font-size: var(--fs-lead);
  letter-spacing: var(--track-tight);
  color: var(--ink-100);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  border-bottom: 1px solid var(--ink-020);
  padding-bottom: 0.35rem;
  transition: border-color var(--dur-fast) var(--ease-out);
}
.closing__mail .arrow {
  transition: transform var(--dur-fast) var(--ease-out);
}
.closing__mail:hover {
  border-color: var(--ink-090);
}
.closing__mail:hover .arrow {
  transform: translateX(5px);
}

/* =============================================================================
   Contact lines
   ========================================================================== */
.contact-line {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-top: 1px solid var(--line);
}
.contact-line__key {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-035);
  width: 5.5rem;
  flex: none;
}
.contact-line__val {
  color: var(--ink-090);
  font-size: var(--fs-small);
}
.contact-line a.contact-line__val {
  transition: color var(--dur-fast) var(--ease-out);
}
.contact-line a.contact-line__val:hover {
  color: var(--ink-100);
  text-decoration: underline;
  text-underline-offset: 3px;
}