.linkup-shell-page::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 12%, rgba(245, 171, 83, 0.16), transparent 22%),
    radial-gradient(circle at 84% 16%, rgba(87, 199, 187, 0.14), transparent 26%),
    linear-gradient(180deg, #09111c 0%, #102036 52%, #0a1422 100%);
}

.linkup-page-content {
  display: grid;
  gap: 14px;
}

.linkup-head .page-kicker,
.linkup-section-head .section-kicker {
  color: #f3b35a;
}

.linkup-head h1,
.linkup-section-head h2,
.linkup-info-card h2 {
  color: #f5f8fb;
}

.linkup-head .page-copy,
.linkup-meta-copy,
.linkup-intro-copy,
.linkup-message,
.linkup-info-card p,
.linkup-info-card li {
  color: #9cb0c5;
}

.linkup-stage-card,
.linkup-info-card,
.linkup-sheet .info-card {
  border: 1px solid rgba(130, 159, 191, 0.16);
  background: linear-gradient(180deg, rgba(18, 30, 48, 0.96), rgba(10, 18, 31, 0.98));
  box-shadow: 0 24px 60px rgba(3, 8, 20, 0.42);
}

.linkup-stage-card {
  padding: 12px;
  border-radius: 30px;
}

.linkup-topbar,
.linkup-control-panel {
  margin-bottom: 12px;
  padding: 14px;
  border-radius: 22px;
  border: 1px solid rgba(130, 159, 191, 0.14);
  background: rgba(10, 18, 31, 0.74);
}

.linkup-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.linkup-section-head h2 {
  margin: 0;
  font-size: 1.18rem;
}

.linkup-meta-copy {
  font-size: 0.88rem;
  text-align: right;
}

.linkup-level-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.linkup-level-button {
  position: relative;
  display: grid;
  gap: 6px;
  min-height: 74px;
  padding: 10px;
  border: 1px solid rgba(130, 159, 191, 0.12);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(23, 38, 60, 0.98), rgba(12, 23, 39, 0.98));
  color: #edf4fa;
  text-align: left;
  font: inherit;
}

.linkup-level-button.active {
  border-color: rgba(243, 179, 90, 0.48);
  box-shadow: 0 12px 28px rgba(243, 179, 90, 0.16);
}

.linkup-level-button.locked {
  opacity: 0.4;
}

.linkup-level-button.cleared::after {
  content: attr(data-best);
  position: absolute;
  right: 10px;
  top: 10px;
  color: #7de4c1;
  font-size: 0.7rem;
  font-weight: 800;
}

.linkup-level-no {
  color: #7de4c1;
  font-size: 0.76rem;
  font-weight: 800;
}

.linkup-hud-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.linkup-hud-card {
  min-height: 76px;
  padding: 12px 14px;
  border-radius: 18px;
  border: 1px solid rgba(130, 159, 191, 0.12);
  background: linear-gradient(180deg, rgba(18, 31, 49, 1), rgba(12, 22, 35, 1));
}

.linkup-hud-label {
  display: block;
  margin-bottom: 8px;
  color: #89a1be;
  font-size: 0.78rem;
}

.linkup-hud-card strong {
  color: #f5f8fb;
  font-size: 1.24rem;
}

.linkup-intro-copy {
  margin: 10px 0 0;
  line-height: 1.6;
}

.linkup-control-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.linkup-canvas-shell {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  border: 1px solid rgba(130, 159, 191, 0.16);
  background:
    radial-gradient(circle at top, rgba(119, 228, 195, 0.08), transparent 28%),
    linear-gradient(180deg, #06101a 0%, #0b1726 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.linkup-canvas {
  width: 100%;
  min-height: min(74vh, 760px);
  aspect-ratio: 9 / 13.2;
  touch-action: manipulation;
}

.linkup-canvas canvas {
  display: block;
  width: 100%;
  height: auto;
}

.stage-toast {
  position: absolute;
  left: 50%;
  top: 18px;
  transform: translateX(-50%) translateY(-10px);
  min-width: 180px;
  max-width: calc(100% - 28px);
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid rgba(243, 179, 90, 0.22);
  background: rgba(9, 17, 28, 0.94);
  color: #f3b35a;
  text-align: center;
  font-size: 0.88rem;
  font-weight: 800;
  opacity: 0;
  pointer-events: none;
  z-index: 6;
  transition: opacity 180ms ease, transform 180ms ease;
}

.stage-toast[data-tone="accent"] {
  border-color: rgba(125, 228, 193, 0.28);
  color: #7de4c1;
}

.stage-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.stage-toast.hidden {
  display: none;
}

.linkup-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(4, 10, 18, 0.52);
  z-index: 5;
}

.linkup-overlay.hidden {
  display: none;
}

.linkup-overlay-card {
  width: 100%;
  max-width: 352px;
  padding: 24px 20px;
  border-radius: 24px;
  border: 1px solid rgba(130, 159, 191, 0.2);
  background: linear-gradient(180deg, rgba(17, 29, 47, 0.98), rgba(10, 18, 31, 0.98));
  text-align: center;
}

.linkup-overlay-tag {
  margin: 0 0 8px;
  color: #f3b35a;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.linkup-overlay-card h2 {
  margin: 0 0 10px;
  color: #f5f8fb;
  font-size: 1.72rem;
}

.linkup-overlay-card p {
  margin: 0 0 16px;
  color: #a3b6ca;
  line-height: 1.6;
}

.linkup-overlay-actions {
  display: grid;
  gap: 8px;
}

#linkupActionButton {
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: 16px;
  color: #07111c;
  background: linear-gradient(135deg, #f7c55d, #ef9f3f);
  font: inherit;
  font-weight: 800;
}

#linkupSecondaryButton {
  width: 100%;
  border-radius: 16px;
  border-color: rgba(130, 159, 191, 0.18);
  color: #d8e4ef;
}

.linkup-message {
  margin: 12px 0 0;
}

.linkup-info-card .card-content {
  position: relative;
}

.linkup-info-card .card-content::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(125, 228, 193, 0.08), transparent 28%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.04), transparent 60%);
  pointer-events: none;
}

.linkup-info-card h2,
.linkup-info-card p,
.linkup-info-card ul,
.linkup-info-card ol {
  position: relative;
  z-index: 1;
}

.linkup-sheet .info-card p,
.linkup-sheet .powerup-list,
.linkup-info-card .powerup-list,
.linkup-info-card .leaderboard-list {
  color: #9cb0c5;
}

.linkup-sheet .info-card h2 {
  color: #f5f8fb;
}

.mobile-toolbar .toolbar-inner {
  gap: 2px;
}

.mobile-toolbar .link {
  font-size: 0.8rem;
}

@media (min-width: 768px) {
  .linkup-insight-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (max-width: 640px) {
  .linkup-level-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .linkup-hud-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .linkup-section-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .linkup-meta-copy {
    text-align: left;
  }
}

@media (max-width: 430px) {
  .linkup-page-content {
    gap: 12px;
  }

  .linkup-stage-card {
    padding: 10px;
    border-radius: 24px;
  }

  .linkup-topbar,
  .linkup-control-panel {
    margin-bottom: 10px;
    padding: 12px;
    border-radius: 18px;
  }

  .linkup-level-list,
  .linkup-hud-grid,
  .linkup-control-row {
    gap: 8px;
  }

  .linkup-level-button,
  .linkup-hud-card {
    min-height: 64px;
    padding: 10px;
    border-radius: 16px;
  }

  .linkup-canvas {
    min-height: min(60vh, 600px);
  }
}