/**
 * Platonic Solids — interactive 3D course
 * Education accent; multi-face colors inspired by classical teaching plates.
 */

.faculty-education {
  --education-accent: #c9a227;
}

:root[data-theme="light"] .faculty-education {
  --education-accent: #9a7a18;
}

.ps-course {
  --ps-accent: var(--education-accent, #c9a227);
  --ps-space-1: 0.5rem;
  --ps-space-2: 0.75rem;
  --ps-space-3: 1rem;
  --ps-space-4: 1.25rem;
  --ps-space-5: 1.5rem;
  --ps-space-6: 2rem;
  --ps-space-7: 2.75rem;
  color: var(--color-text);
  font-family: var(--font-sans);
  max-width: var(--max-width);
  margin: 0 auto;
  padding-bottom: var(--ps-space-7);
}

/* ——— Hero constellation ——— */

.ps-hero {
  position: relative;
  margin: 0 0 var(--ps-space-6);
  border: 1px solid var(--color-panel-outline);
  border-radius: 1rem;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, color-mix(in srgb, var(--ps-accent) 18%, transparent), transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 80%, color-mix(in srgb, var(--ratio-accent) 12%, transparent), transparent 60%),
    var(--color-surface);
  min-height: min(52vh, 420px);
}

.ps-hero__canvas-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.ps-hero__canvas-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.ps-hero__copy {
  position: relative;
  z-index: 1;
  padding: clamp(1.25rem, 4vw, 2.25rem);
  max-width: 36rem;
  pointer-events: none;
}

@media (max-width: 640px) {
  .ps-hero {
    min-height: min(42vh, 320px);
  }

  .ps-hero__copy {
    background: linear-gradient(
      180deg,
      color-mix(in srgb, var(--color-surface) 75%, transparent) 0%,
      transparent 100%
    );
  }
}

.ps-hero__copy h2 {
  margin: 0 0 var(--ps-space-2);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.ps-hero__copy p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.98rem;
  line-height: 1.55;
  text-shadow: 0 1px 12px color-mix(in srgb, var(--color-bg) 55%, transparent);
}

.ps-hero__hint {
  margin-top: var(--ps-space-3) !important;
  font-size: 0.82rem !important;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--ps-accent) 85%, var(--color-muted)) !important;
}

/* ——— Layout: picker + stage ——— */

.ps-layout {
  display: grid;
  gap: var(--ps-space-5);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 960px) {
  .ps-layout {
    grid-template-columns: minmax(0, 17rem) minmax(0, 1fr);
    align-items: start;
  }
}

.ps-picker {
  display: flex;
  flex-direction: column;
  gap: var(--ps-space-2);
}

.ps-picker__label {
  margin: 0 0 var(--ps-space-1);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.ps-picker__btn {
  appearance: none;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.15rem 0.85rem;
  align-items: center;
  text-align: left;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--color-panel-outline);
  border-radius: 0.7rem;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  font: inherit;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.ps-picker__btn:hover,
.ps-picker__btn:focus-visible {
  border-color: color-mix(in srgb, var(--ps-accent) 55%, var(--color-panel-outline));
  outline: none;
}

.ps-picker__btn[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--ps-accent) 70%, transparent);
  background: color-mix(in srgb, var(--ps-accent) 12%, var(--color-surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--ps-accent) 25%, transparent);
}

.ps-picker__swatch {
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 0.35rem;
  grid-row: span 2;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--color-text) 12%, transparent);
}

.ps-picker__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
}

.ps-picker__meta {
  font-size: 0.78rem;
  color: var(--color-muted);
}

/* ——— Stage (main viewer) ——— */

.ps-stage {
  display: flex;
  flex-direction: column;
  gap: var(--ps-space-4);
  min-width: 0;
}

.ps-viewer {
  position: relative;
  border: 1px solid var(--color-panel-outline);
  border-radius: 1rem;
  overflow: hidden;
  background:
    radial-gradient(circle at 40% 30%, color-mix(in srgb, var(--ps-accent) 10%, transparent), transparent 55%),
    var(--color-bg-accent);
  aspect-ratio: 16 / 11;
  min-height: 280px;
}

.ps-viewer canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}

.ps-viewer canvas:active {
  cursor: grabbing;
}

.ps-viewer__hud {
  position: absolute;
  left: 0.85rem;
  bottom: 0.85rem;
  right: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  pointer-events: none;
  z-index: 2;
}

.ps-viewer__chip {
  pointer-events: auto;
  appearance: none;
  border: 1px solid color-mix(in srgb, var(--color-panel-outline) 80%, var(--ps-accent));
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  backdrop-filter: blur(8px);
  color: var(--color-text);
  font: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease;
}

.ps-viewer__chip:hover,
.ps-viewer__chip:focus-visible {
  border-color: var(--ps-accent);
  outline: none;
}

.ps-viewer__chip[aria-pressed="true"] {
  background: color-mix(in srgb, var(--ps-accent) 28%, var(--color-surface));
  border-color: var(--ps-accent);
}

.ps-viewer__badge {
  position: absolute;
  top: 0.85rem;
  left: 0.85rem;
  z-index: 2;
  padding: 0.35rem 0.65rem;
  border-radius: 0.45rem;
  background: color-mix(in srgb, var(--color-surface) 82%, transparent);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-panel-outline);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.ps-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.ps-controls__group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.ps-btn {
  appearance: none;
  border: 1px solid var(--color-panel-outline);
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
  font-size: 0.85rem;
  padding: 0.45rem 0.85rem;
  border-radius: 0.55rem;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease;
}

.ps-btn:hover,
.ps-btn:focus-visible {
  border-color: color-mix(in srgb, var(--ps-accent) 55%, var(--color-panel-outline));
  outline: none;
}

.ps-btn[aria-pressed="true"] {
  border-color: var(--ps-accent);
  background: color-mix(in srgb, var(--ps-accent) 16%, var(--color-surface));
}

.ps-btn--accent {
  border-color: color-mix(in srgb, var(--ps-accent) 50%, var(--color-panel-outline));
  color: var(--color-text);
  font-weight: 500;
}

/* ——— Info panel ——— */

.ps-info {
  border: 1px solid var(--color-panel-outline);
  border-radius: 1rem;
  background: var(--color-surface);
  padding: clamp(1rem, 2.5vw, 1.5rem);
}

.ps-info__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--ps-space-2);
  margin-bottom: var(--ps-space-3);
}

.ps-info__header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.8vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.ps-info__element {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ps-accent);
  font-weight: 600;
}

.ps-info__lede {
  margin: 0 0 var(--ps-space-4);
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.55;
  max-width: 58ch;
}

.ps-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(5.5rem, 1fr));
  gap: var(--ps-space-2);
  margin: 0 0 var(--ps-space-5);
  padding: 0;
  list-style: none;
}

.ps-stats li {
  border: 1px solid var(--color-panel-outline);
  border-radius: 0.6rem;
  padding: 0.65rem 0.75rem;
  background: color-mix(in srgb, var(--color-bg-accent) 55%, var(--color-surface));
}

.ps-stats__value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.ps-stats__label {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.ps-stats__euler {
  grid-column: 1 / -1;
  border-color: color-mix(in srgb, var(--ps-accent) 40%, var(--color-panel-outline));
  background: color-mix(in srgb, var(--ps-accent) 10%, var(--color-surface));
}

.ps-stats__euler .ps-stats__value {
  font-size: 1.05rem;
  font-family: var(--font-mono);
  font-weight: 500;
}

.ps-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin: 0 0 var(--ps-space-5);
  font-size: 0.88rem;
  color: var(--color-muted);
}

.ps-meta-row strong {
  color: var(--color-text);
  font-weight: 500;
}

.ps-lessons {
  display: flex;
  flex-direction: column;
  gap: var(--ps-space-3);
}

.ps-lesson {
  border-top: 1px solid var(--color-panel-outline);
  padding-top: var(--ps-space-3);
}

.ps-lesson h3 {
  margin: 0 0 var(--ps-space-2);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
}

.ps-lesson p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-text) 88%, var(--color-muted));
  max-width: 62ch;
}

/* ——— Synthesis ——— */

.ps-synthesis {
  margin-top: var(--ps-space-7);
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--color-panel-outline);
  border-radius: 1rem;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--ps-accent) 8%, transparent), transparent 50%),
    var(--color-surface);
}

.ps-synthesis h2 {
  margin: 0 0 var(--ps-space-2);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.55rem);
  font-weight: 700;
}

.ps-synthesis > p {
  margin: 0 0 var(--ps-space-5);
  max-width: 62ch;
  color: var(--color-muted);
  line-height: 1.6;
}

.ps-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.ps-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 28rem;
}

.ps-table th,
.ps-table td {
  padding: 0.55rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-panel-outline);
}

.ps-table th {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  font-weight: 500;
}

.ps-table td:nth-child(n + 2) {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.ps-table tr[data-active="true"] {
  background: color-mix(in srgb, var(--ps-accent) 14%, transparent);
}

.ps-table tr[data-active="true"] td:first-child {
  font-weight: 600;
}

.ps-back {
  margin-top: var(--ps-space-6);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.ps-back a {
  color: var(--color-link);
}

.ps-loading {
  margin: 2rem 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.ps-error {
  margin: 1.5rem 0;
  padding: 1rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--imaginatio-accent) 45%, var(--color-panel-outline));
  border-radius: 0.7rem;
  color: var(--color-text);
  background: color-mix(in srgb, var(--imaginatio-accent) 8%, var(--color-surface));
}

/* Homepage spotlight accent for Platonic card */
.home-spotlight__card--platonic {
  border-color: color-mix(in srgb, #c9a227 40%, var(--color-panel-outline));
}

.home-spotlight__card--platonic .entry-label {
  color: #c9a227;
}

:root[data-theme="light"] .home-spotlight__card--platonic .entry-label {
  color: #9a7a18;
}

.home-spotlight__card--dodeca {
  border-color: color-mix(in srgb, #c9a227 45%, var(--color-panel-outline));
}

.home-spotlight__card--dodeca .entry-label {
  color: #c9a227;
}

:root[data-theme="light"] .home-spotlight__card--dodeca .entry-label {
  color: #9a7a18;
}

.header-featured-link--education {
  border-color: color-mix(in srgb, #c9a227 45%, var(--color-panel-outline));
  font-weight: 500;
}

.card--featured-education {
  border-color: color-mix(in srgb, #c9a227 45%, var(--color-panel-outline));
  background:
    radial-gradient(ellipse 70% 50% at 100% 0%, color-mix(in srgb, #c9a227 14%, transparent), transparent 65%),
    var(--color-surface);
}

/* ——— Mode tabs ——— */

.ps-modes {
  display: inline-flex;
  gap: 0.35rem;
  margin: 0 0 var(--ps-space-5);
  padding: 0.3rem;
  border: 1px solid var(--color-panel-outline);
  border-radius: 999px;
  background: var(--color-surface);
}

.ps-modes__btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--color-muted);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
}

.ps-modes__btn:hover,
.ps-modes__btn:focus-visible {
  color: var(--color-text);
  outline: none;
}

.ps-modes__btn[aria-selected="true"] {
  background: color-mix(in srgb, var(--ps-accent) 22%, var(--color-bg-accent));
  color: var(--color-text);
}

/* ——— Shape Forge ——— */

.ps-forge__intro {
  margin-bottom: var(--ps-space-5);
  max-width: 40rem;
}

.ps-forge__eyebrow {
  margin: 0 0 var(--ps-space-1);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ps-accent);
  font-weight: 600;
}

.ps-forge__intro h2 {
  margin: 0 0 var(--ps-space-2);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.8vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.ps-forge__intro p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.55;
  font-size: 0.95rem;
}

.ps-forge__layout {
  display: grid;
  gap: var(--ps-space-5);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 960px) {
  .ps-forge__layout {
    grid-template-columns: minmax(0, 16.5rem) minmax(0, 1fr);
    align-items: start;
  }
}

.ps-forge__sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--ps-space-2);
}

.ps-forge__palette,
.ps-forge__modes,
.ps-forge__actions {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.ps-forge__modes {
  flex-direction: row;
  flex-wrap: wrap;
}

.ps-forge__hint {
  margin: var(--ps-space-3) 0 0;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--color-muted);
}

.ps-forge__hint kbd {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--color-panel-outline);
  border-radius: 0.3rem;
  background: var(--color-bg-accent);
}

.ps-forge__count {
  margin: var(--ps-space-2) 0 0;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--ps-accent);
  font-weight: 500;
}

.ps-forge__viewer {
  position: relative;
  border: 1px solid var(--color-panel-outline);
  border-radius: 1rem;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 20%, color-mix(in srgb, var(--ps-accent) 12%, transparent), transparent 55%),
    var(--color-bg-accent);
  aspect-ratio: 16 / 11;
  min-height: 320px;
}

.ps-forge__viewer canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.ps-forge__viewer .ps-viewer__badge {
  position: absolute;
  top: 0.85rem;
  left: 0.85rem;
  z-index: 2;
  padding: 0.35rem 0.65rem;
  border-radius: 0.45rem;
  background: color-mix(in srgb, var(--color-surface) 82%, transparent);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-panel-outline);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}