.playground-wrapper {
  --bg: #f8fafc;
  --bg-strong: #e2e8f0;
  --panel: rgba(255, 255, 255, 0.85);
  --panel-border: rgba(30, 58, 138, 0.1);
  --text: #0f172a;
  --muted: #64748b;
  --accent: #1e3a8a;
  --accent-strong: #0ea5e9;
  --accent-warm: #f43f5e;
  --success: #10b981;
  --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
  --radius-lg: 24px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --panel-solid: #ffffff;

  position: relative;
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(30, 58, 138, 0.1), transparent 32%),
    radial-gradient(circle at 85% 15%, rgba(244, 63, 94, 0.08), transparent 26%),
    linear-gradient(160deg, #f8fafc 0%, #f1f5f9 48%, #e2e8f0 100%);
}


.playground-wrapper::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(30, 58, 138, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 138, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  z-index: 0;
}

.page-shell {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

/* Remove the gap above the global footer for a seamless transition */
.footer {
  margin-top: 0 !important;
}

.peptide-hero,
.dashboard {
  animation: lift-in 700ms ease both;
}

.peptide-hero {
  margin-bottom: 40px;
}

.hero-copy,
.hero-callout,
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
}

.hero-copy {
  border-radius: 36px;
  padding: 34px 34px 30px;
}

.eyebrow {
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--accent);
}

.peptide-hero h1,
.panel h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  letter-spacing: -0.03em;
}

.peptide-hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.8rem);
  line-height: 0.96;
}

.hero-text,
.panel-heading p,
.hero-callout p,
.viewer-note {
  color: var(--muted);
  line-height: 1.6;
}

.hero-text {
  margin: 16px 0 0;
  font-size: 1.04rem;
}

.hero-callout {
  margin-top: 26px;
  border-radius: 22px;
  padding: 22px 24px;
  background: rgba(255, 245, 231, 0.88);
  border: 1px solid rgba(202, 103, 2, 0.14);
  box-shadow: none;
}

.callout-label,
.block-label,
.metric-label,
.field-label {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.dashboard {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 20px;
}

.panel {
  border-radius: var(--radius-lg);
  padding: 28px;
}

.control-panel {
  grid-column: span 4;
}

.summary-panel {
  grid-column: span 8;
}

.viewer-panel {
  grid-column: span 12;
  background: var(--panel-solid);
}

.structure-panel {
  grid-column: span 12;
}

.panel-heading {
  margin-bottom: 20px;
}

.panel-heading h2 {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

.panel-heading p {
  margin: 0;
}

.generator-form {
  display: grid;
  gap: 10px;
}

.ph-stack {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.input-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

input[type="text"] {
  flex: 1;
  min-width: 0;
  border: 1px solid rgba(87, 97, 107, 0.22);
  border-radius: 999px;
  padding: 16px 18px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.88);
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--accent-strong);
  box-shadow: 0 0 0 6px rgba(14, 165, 233, 0.12);
  transform: translateY(-1px);
}

.ph-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ph-display {
  font-weight: 700;
  color: var(--accent);
  font-size: 1.1rem;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: var(--bg-strong);
  border-radius: 999px;
  outline: none;
  margin: 10px 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  background: var(--accent);
  cursor: pointer;
  border: 3px solid white;
  border-radius: 50%;
  box-shadow: var(--shadow);
  transition: transform 150ms ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.field-helper {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

button {
  border: 0;
  border-radius: 999px;
  font: inherit;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

button:hover {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.primary-button,
.secondary-button,
.ghost-chip {
  padding: 14px 18px;
  font-weight: 700;
}

.primary-button {
  min-width: 170px;
  align-self: flex-start;
  color: white;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  box-shadow: 0 14px 26px rgba(0, 95, 115, 0.22);
}

.secondary-button {
  color: var(--accent);
  background: rgba(0, 95, 115, 0.08);
}

.ghost-chip {
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  background: white;
  border: 1px solid var(--panel-border);
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  transition: all 0.2s ease;
}

.ghost-chip:hover {
  background: var(--bg-strong);
  border-color: var(--accent-strong);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.examples-label {
  display: block;
  width: 100%;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.quick-examples,
.viewer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.quick-examples {
  margin-top: 20px;
}

.status-banner {
  min-height: 52px;
  margin-top: 18px;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  background: rgba(58, 125, 68, 0.08);
  color: #234e2c;
  border: 1px solid rgba(58, 125, 68, 0.15);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.metric-card {
  border-radius: var(--radius-md);
  padding: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(248, 242, 230, 0.88));
  border: 1px solid rgba(99, 78, 47, 0.12);
}

.metric-card strong {
  display: block;
  font-size: 1.32rem;
  line-height: 1.2;
}

.sequence-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 22px;
  margin: 24px 0;
}

.block-value {
  margin: 0;
  font-size: 1.08rem;
}

.sequence-text,
#formula-value {
  word-break: break-word;
  font-family: "Cascadia Code", "Consolas", monospace;
}

.mapping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}

.mapping-card {
  padding: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 95, 115, 0.12);
  background: rgba(255, 255, 255, 0.76);
}

.mapping-pair {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 1rem;
}

.mapping-index {
  font-size: 0.8rem;
  color: var(--muted);
}

.mapping-meta {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.mapping-properties {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.property-pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(0, 95, 115, 0.08);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
}

.mapping-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 700;
}

.mapping-badge.original {
  background: rgba(202, 103, 2, 0.12);
  color: var(--accent-warm);
}

.mapping-badge.residue {
  background: rgba(0, 95, 115, 0.12);
  color: var(--accent);
}

.viewer-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.prediction-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0 0 18px;
}

.prediction-card {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(0, 95, 115, 0.12);
}

.element-legend-card {
  margin: 0 0 18px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(0, 95, 115, 0.12);
}

.element-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.legend-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(0, 95, 115, 0.06);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 700;
}

.legend-swatch {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  border: 1px solid rgba(27, 31, 35, 0.16);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.24);
}

.legend-note {
  color: var(--muted);
  line-height: 1.5;
}

.viewer-canvas {
  position: relative;
  height: 520px;
  overflow: hidden;
  border-radius: 26px;
  border: 1px solid rgba(99, 78, 47, 0.14);
  background:
    radial-gradient(circle at 20% 20%, rgba(10, 147, 150, 0.18), transparent 28%),
    radial-gradient(circle at 82% 25%, rgba(202, 103, 2, 0.12), transparent 22%),
    linear-gradient(180deg, rgba(255, 251, 247, 0.96), rgba(240, 231, 214, 0.92));
}

.viewer-canvas > div,
.viewer-canvas canvas {
  width: 100% !important;
  height: 100% !important;
}

.structure-canvas {
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: center;
  overflow-x: auto;
  overflow-y: hidden;
  border-radius: 26px;
  border: 1px solid rgba(99, 78, 47, 0.14);
  background:
    radial-gradient(circle at 15% 16%, rgba(0, 95, 115, 0.08), transparent 26%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 240, 228, 0.94));
}

.structure-canvas .viewer-placeholder {
  min-height: 220px;
}

.structure-canvas svg {
  display: block;
  margin: auto;
  height: 100%;
  max-height: 230px;
  max-width: none;
  flex-shrink: 0;
}

.viewer-worker {
  position: fixed;
  left: -9999px;
  top: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.viewer-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 1rem;
}

.viewer-note {
  margin: 14px 0 0;
}

.viewer-warning {
  margin-bottom: 24px;
  padding: 18px;
  background: rgba(244, 63, 94, 0.06);
  border: 1px solid rgba(244, 63, 94, 0.12);
  border-radius: var(--radius-md);
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.viewer-warning-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.viewer-warning-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--accent-warm);
  font-weight: 500;
}

@keyframes lift-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1040px) {
  .dashboard {
    grid-template-columns: 1fr;
  }

  .control-panel,
  .summary-panel,
  .viewer-panel,
  .structure-panel {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .page-shell {
    padding: 22px 14px 40px;
  }

  .hero-copy,
  .hero-callout,
  .panel {
    padding: 20px;
  }

  .viewer-header {
    flex-direction: column;
  }

  .primary-button {
    width: 100%;
    text-align: center;
  }

  .secondary-button {
    width: auto;
  }

  .metric-grid,
  .prediction-grid,
  .sequence-block {
    grid-template-columns: 1fr 1fr;
  }

  .viewer-canvas {
    height: 340px;
    width: 100%;
    max-width: 100%;
  }

  /* 2D Structure: constrain SVG to fit within the panel on mobile */
  .structure-canvas {
    min-height: 200px;
    overflow-x: auto;
    overflow-y: hidden;
    width: 100%;
    box-sizing: border-box;
  }

  .structure-canvas svg {
    max-width: 100%;
    height: auto;
    max-height: 200px;
  }

  /* Mapping grid: 1 column on mobile so amino acid cards don't overflow */
  .mapping-grid {
    grid-template-columns: 1fr;
  }

  /* Summary panel stats in 2 columns */
  .metric-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* Prediction grid: 1 column */
  .prediction-grid {
    grid-template-columns: 1fr;
  }

  /* Sequence block: 1 column */
  .sequence-block {
    grid-template-columns: 1fr;
  }
}