.design-main {
  display: grid;
  gap: 40px;
  margin-top: 32px;
}

.system-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.95fr);
  gap: 32px;
  align-items: center;
  padding: 40px;
}

.system-hero-copy,
.system-mark-panel,
.mark-notes,
.principle-card,
.swatch-card,
.scene-card,
.ui-card,
.motion-card,
.rule-card {
  display: grid;
  gap: 14px;
}

.system-hero-copy h1,
.section-intro h2 {
  font-size: clamp(2.7rem, 4.8vw, 4.1rem);
}

.system-hero-copy h1 {
  max-width: 11ch;
}

.system-hero-copy p,
.principle-card p,
.swatch-card span,
.scene-card p,
.ui-card p,
.motion-card p,
.rule-card p,
.mark-notes p {
  color: var(--text-secondary);
  font-size: 16px;
}

.system-mark-panel {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(251, 252, 254, 0.94), rgba(238, 242, 245, 0.96));
  box-shadow: var(--shadow-strong);
}

.mark-frame {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(251, 252, 254, 0.92);
}

.mark-frame img {
  width: 128px;
  height: 128px;
}

.mark-notes h2,
.principle-card h3,
.ui-card h3,
.rule-card h3 {
  font-size: 1.4rem;
}

.motif-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.motif-tile {
  position: relative;
  min-height: 98px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
}

.motif-tile span {
  position: absolute;
  left: 12px;
  bottom: 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.motif-tile::before,
.motif-tile::after {
  content: "";
  position: absolute;
}

.motif-document::before {
  top: 18px;
  left: 18px;
  width: 42px;
  height: 50px;
  border: 3px solid var(--text);
  border-radius: 12px;
  background: rgba(251, 252, 254, 0.92);
}

.motif-document::after {
  top: 32px;
  left: 30px;
  width: 18px;
  height: 3px;
  border-radius: 999px;
  background: var(--blue-strong);
  box-shadow: 0 11px 0 rgba(143, 165, 191, 0.8), 0 22px 0 rgba(143, 165, 191, 0.8);
}

.motif-lines::before {
  top: 24px;
  left: 16px;
  width: 54px;
  height: 42px;
  border-radius: 14px;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(143, 165, 191, 0.84) 0 4px,
      transparent 4px 13px
    );
}

.motif-lens::before {
  top: 18px;
  left: 18px;
  width: 42px;
  height: 42px;
  border: 4px solid var(--text);
  border-radius: 50%;
}

.motif-lens::after {
  top: 52px;
  left: 52px;
  width: 26px;
  height: 10px;
  border-radius: 999px;
  background: var(--blue-strong);
  transform: rotate(42deg);
}

.motif-highlight::before {
  top: 26px;
  left: 16px;
  width: 54px;
  height: 46px;
  border: 2px solid rgba(143, 165, 191, 0.36);
  border-radius: 14px;
  background:
    linear-gradient(180deg, transparent 0 34%, rgba(212, 90, 92, 0.88) 34% 46%, transparent 46%),
    repeating-linear-gradient(180deg, rgba(143, 165, 191, 0.7) 0 3px, transparent 3px 12px);
}

.motif-cluster::before {
  top: 18px;
  left: 28px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--blue-strong);
  box-shadow: 26px 10px 0 var(--blue), -6px 32px 0 var(--blue), 34px 34px 0 var(--red);
}

.motif-cluster::after {
  top: 30px;
  left: 28px;
  width: 42px;
  height: 24px;
  border-left: 2px solid rgba(79, 104, 135, 0.36);
  border-bottom: 2px solid rgba(79, 104, 135, 0.36);
  transform: skewX(-16deg);
}

.principle-grid,
.swatch-grid,
.scene-grid,
.motion-grid,
.rule-grid {
  display: grid;
  gap: 18px;
}

.principle-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.principle-card,
.scene-card,
.ui-card,
.motion-card,
.rule-card {
  position: relative;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.principle-card::before,
.motion-card::before,
.rule-card::before {
  content: "";
  position: absolute;
  top: 18px;
  right: 18px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(143, 165, 191, 0.32), 0 0 0 8px rgba(143, 165, 191, 0.08);
}

.swatch-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.swatch-card {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.swatch-block {
  height: 104px;
  border: 1px solid rgba(36, 53, 77, 0.08);
  border-radius: 16px;
}

.swatch-bg {
  background: #f4f1eb;
}

.swatch-navy {
  background: #24354d;
}

.swatch-blue {
  background: #8fa5bf;
}

.swatch-surface {
  background: #eef2f5;
}

.swatch-red {
  background: #d45a5c;
}

.scene-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.scene-card {
  margin: 0;
}

.scene-card img {
  width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, #fbfcfd 0%, #f4f1eb 100%);
}

.scene-card strong,
.swatch-card strong,
.motion-card strong,
.module-label,
.detail-row strong,
.cluster-header strong {
  font-size: 1.05rem;
}

.ui-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.9fr;
  gap: 18px;
}

.ui-card {
  align-content: start;
}

.mock-topbar,
.cluster-header,
.detail-row,
.button-row-demo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mock-chip {
  padding: 7px 12px;
  border: 1px solid rgba(79, 104, 135, 0.18);
  border-radius: 999px;
  background: rgba(143, 165, 191, 0.1);
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mock-score {
  width: 46px;
  height: 46px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  border: 3px solid var(--text);
  background: rgba(143, 165, 191, 0.12);
  font-weight: 800;
}

.evidence-stack,
.module-lines {
  display: grid;
  gap: 10px;
}

.evidence-row {
  display: grid;
  gap: 8px;
}

.evidence-row span {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.evidence-row i,
.module-lines span {
  display: block;
  height: 10px;
  border-radius: 999px;
  background: rgba(143, 165, 191, 0.26);
}

.evidence-row-strong i {
  width: 92%;
  background: rgba(79, 104, 135, 0.56);
}

.evidence-row-alert i,
.module-lines .is-alert {
  width: 76%;
  background: rgba(212, 90, 92, 0.84);
}

.evidence-row-soft i {
  width: 58%;
}

.component-mock {
  gap: 18px;
}

.module-card {
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-quiet);
}

.module-label {
  color: var(--text);
}

.button-row-demo {
  justify-content: flex-start;
}

.button-row-demo .button {
  min-height: 42px;
  padding: 10px 14px;
}

.detail-row {
  padding: 16px 0 0;
  border-top: 1px solid var(--border);
  align-items: flex-start;
}

.detail-row span {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.cluster-diagram {
  position: relative;
  min-height: 176px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(251, 252, 254, 0.94), rgba(238, 242, 245, 0.96));
}

.node,
.link {
  position: absolute;
}

.node {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--blue);
  border: 3px solid var(--text);
}

.node-core {
  top: 76px;
  left: 126px;
  width: 28px;
  height: 28px;
  background: var(--blue-strong);
}

.node-a {
  top: 30px;
  left: 54px;
}

.node-b {
  top: 38px;
  right: 54px;
}

.node-c {
  bottom: 34px;
  right: 78px;
}

.node.is-alert {
  background: var(--red);
}

.link {
  height: 2px;
  background: rgba(79, 104, 135, 0.42);
  transform-origin: left center;
}

.link-a {
  top: 88px;
  left: 76px;
  width: 64px;
  transform: rotate(-28deg);
}

.link-b {
  top: 86px;
  left: 144px;
  width: 76px;
  transform: rotate(26deg);
}

.link-c {
  top: 112px;
  left: 144px;
  width: 68px;
  transform: rotate(42deg);
}

.motion-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.motion-card {
  align-content: start;
}

.motion-demo {
  position: relative;
  height: 124px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(251, 252, 254, 0.98), rgba(238, 242, 245, 0.96));
}

.motion-scan::before,
.motion-highlight::before,
.motion-document::before,
.motion-document::after,
.motion-ring::before,
.motion-node::before,
.motion-node::after {
  content: "";
  position: absolute;
}

.motion-scan::before {
  inset: 20px 18px;
  border-radius: 14px;
  background:
    linear-gradient(180deg, transparent 0 42%, rgba(212, 90, 92, 0.86) 42% 50%, transparent 50%),
    repeating-linear-gradient(180deg, rgba(143, 165, 191, 0.82) 0 3px, transparent 3px 12px);
  animation: scanSweep 2.2s ease-in-out infinite;
}

.motion-ring::before {
  top: 28px;
  left: 50%;
  width: 46px;
  height: 46px;
  margin-left: -23px;
  border-radius: 50%;
  border: 3px solid var(--text);
  box-shadow: 0 0 0 12px rgba(143, 165, 191, 0.12);
  animation: ringPulse 2.2s ease-in-out infinite;
}

.motion-highlight::before {
  top: 54px;
  left: 16px;
  height: 12px;
  border-radius: 999px;
  background: var(--red);
  animation: lineGrow 2s ease-in-out infinite;
}

.motion-node::before {
  top: 36px;
  left: 24px;
  right: 24px;
  height: 2px;
  background: rgba(79, 104, 135, 0.3);
}

.motion-node::after {
  top: 28px;
  left: 24px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--red);
  border: 3px solid var(--text);
  animation: nodeTravel 2.4s ease-in-out infinite;
}

.motion-document::before,
.motion-document::after {
  left: 50%;
  width: 64px;
  height: 82px;
  margin-left: -32px;
  border: 3px solid var(--text);
  border-radius: 16px;
  background: rgba(251, 252, 254, 0.94);
}

.motion-document::before {
  top: 18px;
  animation: docFront 2.4s ease-in-out infinite;
}

.motion-document::after {
  top: 30px;
  margin-left: -20px;
  border-color: rgba(79, 104, 135, 0.42);
  background: rgba(238, 242, 245, 0.94);
  animation: docBack 2.4s ease-in-out infinite;
}

.rule-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@keyframes scanSweep {
  0%,
  100% {
    background-position: 0 -18px, 0 0;
  }

  50% {
    background-position: 0 18px, 0 0;
  }
}

@keyframes ringPulse {
  0%,
  100% {
    transform: scale(0.94);
    box-shadow: 0 0 0 10px rgba(143, 165, 191, 0.08);
  }

  50% {
    transform: scale(1.04);
    box-shadow: 0 0 0 16px rgba(143, 165, 191, 0.14);
  }
}

@keyframes lineGrow {
  0%,
  100% {
    width: 30px;
  }

  50% {
    width: calc(100% - 32px);
  }
}

@keyframes nodeTravel {
  0%,
  100% {
    left: 24px;
  }

  50% {
    left: calc(100% - 42px);
  }
}

@keyframes docFront {
  0%,
  100% {
    transform: translate(-8px, 0);
  }

  50% {
    transform: translate(-14px, -6px);
  }
}

@keyframes docBack {
  0%,
  100% {
    transform: translate(10px, 4px);
  }

  50% {
    transform: translate(18px, 10px);
  }
}

@media (max-width: 1100px) {
  .system-hero,
  .ui-grid {
    grid-template-columns: 1fr;
  }

  .motion-grid,
  .swatch-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .principle-grid,
  .scene-grid,
  .rule-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .motif-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .system-hero,
  .principle-card,
  .swatch-card,
  .scene-card,
  .ui-card,
  .motion-card,
  .rule-card {
    padding: 18px;
  }

  .mark-frame,
  .principle-grid,
  .swatch-grid,
  .scene-grid,
  .motion-grid,
  .rule-grid,
  .motif-strip {
    grid-template-columns: 1fr;
  }

  .mark-frame {
    gap: 16px;
  }

  .mark-frame img {
    width: 96px;
    height: 96px;
  }
}