/* ====== Platform page ====== */

.plat-hero {
  padding: 80px 0 80px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.plat-hero-eyebrow {
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 14px;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
  font-weight: 500;
  position: relative;
  z-index: 1;
}
.plat-hero-title {
  margin-top: 32px;
  font-size: clamp(2.5rem, 5.5vw, 5rem);
  position: relative;
  z-index: 1;
  max-width: 22ch;
}
.plat-hero-lead {
  margin-top: 32px;
  max-width: 64ch;
  font-size: 18px;
  position: relative;
  z-index: 1;
}
.plat-hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  position: relative;
  z-index: 1;
}
@media (max-width: 880px) {
  .plat-hero-stats { grid-template-columns: repeat(2, 1fr); }
}
.plat-hero-stat-k {
  font-family: var(--font-serif);
  font-size: 56px;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--accent);
}
.plat-hero-stat-v {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  margin-top: 12px;
  text-transform: uppercase;
}

/* Architecture diagram */
.plat-arch-section {
  padding: 64px 0 80px;
  background: var(--bg-elev);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* Module explorer */
.plat-modules {
  padding: 120px 0;
}
.plat-explorer {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 32px;
  margin-top: 56px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--bg);
  min-height: 560px;
}
@media (max-width: 1080px) {
  .plat-explorer { grid-template-columns: 1fr; min-height: 0; }
}
.plat-explorer-list {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background: var(--bg-elev);
}
@media (max-width: 1080px) {
  .plat-explorer-list { border-right: 0; border-bottom: 1px solid var(--line); }
}
.plat-explorer-item {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 12px;
  padding: 18px 24px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  text-align: left;
  cursor: pointer;
  font-size: 14px;
  color: var(--fg);
  font-family: inherit;
  transition: background 0.15s var(--ease);
}
.plat-explorer-item:last-child { border-bottom: 0; }
.plat-explorer-item:hover { background: var(--bg); }
.plat-explorer-item.is-active {
  background: var(--bg);
  border-left: 3px solid var(--accent);
  padding-left: 21px;
}
.plat-explorer-num {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg-subtle);
  font-weight: 500;
}
.plat-explorer-item.is-active .plat-explorer-num { color: var(--accent); }
.plat-explorer-name {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
}
.plat-explorer-ai {
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--accent);
  background: color-mix(in oklab, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in oklab, var(--accent) 30%, transparent);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}
.plat-explorer-arr {
  color: var(--fg-subtle);
  font-size: 14px;
}
.plat-explorer-item.is-active .plat-explorer-arr { color: var(--accent); }

.plat-explorer-detail {
  padding: 48px 56px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
}
.plat-explorer-detail.is-ai {
  background: linear-gradient(135deg, var(--bg) 0%, color-mix(in oklab, var(--accent) 5%, var(--bg)) 100%);
}
.plat-explorer-detail.is-ai::before {
  content: "AI-NATIVE";
  position: absolute;
  top: 24px;
  right: 32px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 600;
}
.plat-explorer-detail-num {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg-subtle);
  text-transform: uppercase;
}
.plat-explorer-detail-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--accent);
  line-height: 1.3;
}
.plat-explorer-detail-title {
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0;
}
.plat-explorer-detail-desc {
  font-size: 16px;
  line-height: 1.55;
  color: var(--fg-muted);
  max-width: 60ch;
  margin: 0;
}
.plat-explorer-detail-pts {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
}
@media (max-width: 720px) {
  .plat-explorer-detail-pts { grid-template-columns: 1fr; }
}
.plat-explorer-detail-pts li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg);
}
.plat-explorer-detail-pts li .mono {
  color: var(--accent);
  flex-shrink: 0;
}
.plat-explorer-detail-stack {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.plat-explorer-detail-stack-label {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg-subtle);
  text-transform: uppercase;
}
.plat-explorer-detail-stack-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.plat-explorer-detail-stack-pill {
  white-space: nowrap;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg);
  background: var(--bg);
}

/* Architecture principles */
.plat-principles {
  padding: 120px 0;
  background: var(--bg-elev);
  border-top: 1px solid var(--line);
}
.plat-principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 56px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
@media (max-width: 1080px) { .plat-principles-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 720px) { .plat-principles-grid { grid-template-columns: 1fr; } }
.plat-principle {
  padding: 32px 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.plat-principle-k {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 500;
}
.plat-principle-v {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-top: 12px;
}
.plat-principle-d {
  font-size: 14px;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 12px 0 0;
  max-width: 36ch;
}

/* CTA */
.plat-cta {
  padding: 120px 0;
  background: var(--bg-deep);
  color: var(--fg-inverse);
}
.plat-cta-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: end;
}
@media (max-width: 880px) {
  .plat-cta-grid { grid-template-columns: 1fr; gap: 32px; }
}
.plat-cta-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}
.plat-cta-primary {
  background: var(--fg-inverse);
  color: var(--bg-deep);
  border-color: var(--fg-inverse);
}
.plat-cta-primary:hover { background: #fff; }
.plat-cta-ghost {
  border-color: var(--line-strong);
  color: var(--fg-inverse);
}
.plat-cta-ghost:hover { background: var(--bg-deep-2); border-color: var(--fg-inverse); }

/* Mobile: allow the pill eyebrow to wrap instead of overflowing the viewport. */
@media (max-width: 480px) {
  .plat-hero-eyebrow { white-space: normal; }
}