/* ===== Labs / Tetris — Living Machine ===== */
:root {
  /* Re-using phenomenal_base.css palette here so the page lives in the same
     visual world as the rest of the site. The page itself is dark so the glow
     can read, but the accent colors are unchanged. */
  --tetris-bg-deep: #0E0B26;     /* deep indigo, sibling of footer #1E1B4B */
  --tetris-bg-mid:  #16123A;
  --tetris-grid:    rgba(165, 200, 255, 0.045);
  --tetris-grid-strong: rgba(165, 200, 255, 0.09);
  --tetris-cell:    rgba(155, 110, 243, 0.85);   /* violet, primary glow */
  --tetris-cell-2:  rgba(79, 142, 247, 0.85);    /* blue */
  --tetris-cell-3:  rgba(192, 132, 252, 0.85);   /* pink */
  --tetris-glow:    rgba(155, 110, 243, 0.55);
  --tetris-text:    #EDE9FE;
  --tetris-muted:   rgba(237, 233, 254, 0.55);
  --tetris-faint:   rgba(237, 233, 254, 0.32);
  --tetris-line:    rgba(237, 233, 254, 0.10);
}

.labs-tetris {
  min-height: 100vh;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(79, 142, 247, 0.18) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 90%, rgba(192, 132, 252, 0.12) 0%, transparent 60%),
    linear-gradient(180deg, var(--tetris-bg-deep) 0%, var(--tetris-bg-mid) 100%);
  color: var(--tetris-text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* The standard Phenomenal nav assumes a light background; reskin it here
   so the labels stay legible on the dark studio. */
.labs-tetris nav {
  background: transparent;
  border-bottom: 1px solid transparent;
}
.labs-tetris nav.scrolled {
  background: rgba(14, 11, 38, 0.78);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--tetris-line);
}
.labs-tetris .nav-links a { color: var(--tetris-text); opacity: 0.78; }
.labs-tetris .nav-links a:hover { opacity: 1; }
.labs-tetris .nav-cta {
  box-shadow: 0 4px 16px rgba(79, 142, 247, 0.45);
}

/* ===== Page layout ===== */
.lt-stage {
  flex: 1 1 auto;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: 6rem 6% 2rem;
  gap: 1.5rem;
  position: relative;
}

/* Top row — breadcrumb left, generation badge right */
.lt-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.lt-breadcrumb {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  background: linear-gradient(135deg, var(--blue, #4F8EF7), var(--violet, #9B6EF3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.lt-breadcrumb a {
  text-decoration: none;
  border-bottom: 1px dotted transparent;
  padding-bottom: 1px;
  transition: filter 0.25s ease, border-bottom-color 0.25s ease;
}
.lt-breadcrumb a:hover {
  filter: brightness(1.2);
  border-bottom-color: rgba(155, 110, 243, 0.55);
}
.lt-breadcrumb-sub {
  margin-top: 0.4rem;
  font-size: 1.6rem;
  font-weight: 200;
  letter-spacing: -0.5px;
  color: var(--tetris-text);
}

.lt-gen {
  text-align: right;
}
.lt-gen-num {
  font-size: 3rem;
  font-weight: 200;
  letter-spacing: -2px;
  line-height: 1;
  color: var(--tetris-text);
  font-variant-numeric: tabular-nums;
}
.lt-gen-num small {
  display: inline-block;
  font-size: 0.62em;
  font-weight: 300;
  opacity: 0.55;
  letter-spacing: 2px;
  margin-right: 0.4em;
  vertical-align: 0.55em;
}
.lt-gen-sub {
  margin-top: 0.35rem;
  font-size: 0.78rem;
  letter-spacing: 1px;
  color: var(--tetris-muted);
  font-variant-numeric: tabular-nums;
}

/* Middle area — board + curve */
.lt-middle {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 22vw);
  gap: 2.5rem;
  align-items: center;
  min-height: 0;
}

.lt-board-frame {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: min(80vh, 720px);
}

.lt-board-canvas {
  display: block;
  width: 100%;
  height: 100%;
  max-width: calc((min(80vh, 720px)) * 0.5); /* 10:20 aspect = 1:2 */
  max-height: 100%;
  border-radius: 14px;
  box-shadow:
    0 0 0 1px var(--tetris-line),
    0 0 60px rgba(155, 110, 243, 0.18),
    inset 0 0 80px rgba(79, 142, 247, 0.06);
  background: rgba(255, 255, 255, 0.012);
}

/* Subtle thin ring around the board, drawn from CSS so the canvas can stay
   purely a play surface. */
.lt-board-frame::before {
  content: "";
  position: absolute;
  inset: 50% 50%;
  width: calc(min(80vh, 720px) * 0.5 + 24px);
  height: calc(min(80vh, 720px) + 24px);
  transform: translate(-50%, -50%);
  border: 1px solid var(--tetris-line);
  border-radius: 18px;
  pointer-events: none;
}

.lt-side {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  align-self: stretch;
  justify-content: center;
}

.lt-curve-card {
  background: rgba(255, 255, 255, 0.018);
  border: 1px solid var(--tetris-line);
  border-radius: 14px;
  padding: 1rem 1.1rem 0.9rem;
}
.lt-curve-label {
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--tetris-faint);
  margin-bottom: 0.6rem;
}
.lt-curve-svg {
  display: block;
  width: 100%;
  height: 110px;
  overflow: visible;
}
.lt-curve-line {
  fill: none;
  stroke: url(#lt-curve-stroke);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.lt-curve-current {
  fill: var(--violet, #9B6EF3);
  filter: drop-shadow(0 0 6px var(--tetris-glow));
}
.lt-curve-empty {
  font-size: 0.75rem;
  color: var(--tetris-faint);
  font-style: italic;
}

.lt-next {
  background: rgba(255, 255, 255, 0.018);
  border: 1px solid var(--tetris-line);
  border-radius: 14px;
  padding: 1rem 1.1rem 0.9rem;
}
.lt-next-label {
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--tetris-faint);
  margin-bottom: 0.6rem;
}
.lt-next-canvas {
  display: block;
  width: 100%;
  height: 90px;
}

/* Bottom row — best record + current game */
.lt-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.78rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--tetris-muted);
  font-variant-numeric: tabular-nums;
}
.lt-bottom dl {
  display: flex;
  gap: 1.6rem;
  margin: 0;
}
.lt-bottom dt {
  display: inline;
  color: var(--tetris-faint);
  margin-right: 0.4em;
  font-weight: 600;
}
.lt-bottom dd {
  display: inline;
  margin: 0;
  color: var(--tetris-text);
  font-weight: 400;
}

/* ===== Generation overlay (the "wow" moment) ===== */
.lt-gen-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 5;
  opacity: 0;
  transition: opacity 0.6s ease;
  text-align: center;
}
.lt-gen-overlay.is-visible { opacity: 1; }
.lt-gen-overlay-title {
  font-size: clamp(2.4rem, 7vw, 5rem);
  font-weight: 100;
  letter-spacing: 4px;
  background: linear-gradient(135deg, var(--blue, #4F8EF7), var(--violet, #9B6EF3), var(--pink, #C084FC));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 40px rgba(155, 110, 243, 0.4);
}
.lt-gen-overlay-sub {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--tetris-muted);
  text-transform: uppercase;
}

/* ===== Offline overlay ===== */
.lt-offline {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(14, 11, 38, 0.72);
  backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
  z-index: 4;
  text-align: center;
}
.lt-offline.is-visible { opacity: 1; pointer-events: auto; }
.lt-offline-text {
  font-size: 1rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--tetris-muted);
  font-weight: 300;
}
.lt-offline-sub {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 1px;
  color: var(--tetris-faint);
  text-transform: none;
}

/* ===== Debug overlay ===== */
.lt-debug {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  background: rgba(0, 0, 0, 0.6);
  color: #aef;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  padding: 0.5rem 0.7rem;
  border-radius: 6px;
  border: 1px solid rgba(165, 200, 255, 0.15);
  z-index: 50;
  line-height: 1.4;
  pointer-events: none;
}

/* ===== Mobile ===== */
@media (max-width: 900px) {
  .lt-stage {
    padding: 5rem 4% 1.5rem;
  }
  .lt-middle {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }
  .lt-side {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .lt-side > * { flex: 1 1 220px; }
  .lt-board-frame {
    height: min(70vh, 560px);
  }
  .lt-board-frame::before {
    width: calc(min(70vh, 560px) * 0.5 + 16px);
    height: calc(min(70vh, 560px) + 16px);
  }
  .lt-bottom {
    flex-direction: column;
    gap: 0.5rem;
  }
  .lt-bottom dl { gap: 1rem; flex-wrap: wrap; }
}

@media (max-width: 560px) {
  .lt-side details {
    width: 100%;
  }
  .lt-side .lt-curve-card,
  .lt-side .lt-next {
    padding: 0.8rem 0.9rem;
  }
  .lt-curve-svg { height: 80px; }
  .lt-next-canvas { height: 70px; }
  .lt-gen-num { font-size: 2.4rem; }
  .lt-breadcrumb-sub { font-size: 1.2rem; }
}

/* Reduced motion: kill all visual fluff */
@media (prefers-reduced-motion: reduce) {
  .lt-gen-overlay { transition: none; }
  .lt-offline { transition: none; }
}

/* Footer recoloring on dark page */
.labs-tetris footer {
  background: transparent;
  border-top: 1px solid var(--tetris-line);
  margin-top: 2rem;
}

/* ===== Engine version badge ===== */
.lt-version {
  margin-top: 0.5rem;
  font-size: 0.66rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--tetris-faint);
  font-variant-numeric: tabular-nums;
}

/* ===== Generation progress ===== */
.lt-gen-progress {
  margin-top: 0.7rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.3rem;
}
.lt-gen-progress-bar {
  width: 160px;
  max-width: 100%;
  height: 4px;
  border-radius: 999px;
  background: rgba(237, 233, 254, 0.08);
  overflow: hidden;
}
.lt-gen-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #4F8EF7, #9B6EF3);
  box-shadow: 0 0 8px rgba(155, 110, 243, 0.5);
  transition: width 0.6s ease;
  border-radius: 999px;
}
.lt-gen-progress-text {
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  color: var(--tetris-muted);
  font-variant-numeric: tabular-nums;
}

/* ===== Sigma exploration meter ===== */
.lt-sigma {
  margin-top: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  justify-content: flex-end;
}
.lt-sigma-label {
  font-size: 0.62rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--tetris-faint);
}
.lt-sigma-bar {
  width: 90px;
  height: 3px;
  border-radius: 999px;
  background: rgba(237, 233, 254, 0.08);
  overflow: hidden;
}
.lt-sigma-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, rgba(192, 132, 252, 0.55), rgba(192, 132, 252, 0.95));
  transition: width 1.2s ease;
  border-radius: 999px;
}
.lt-sigma-value {
  font-size: 0.7rem;
  letter-spacing: 1px;
  color: var(--tetris-muted);
  font-variant-numeric: tabular-nums;
  min-width: 3.4em;
  text-align: right;
}

/* ===== Agent weights chart ===== */
.lt-weights-card {
  background: rgba(255, 255, 255, 0.018);
  border: 1px solid var(--tetris-line);
  border-radius: 14px;
  padding: 1rem 1.1rem 0.9rem;
}
.lt-weights-label {
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--tetris-faint);
  margin-bottom: 0.7rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.lt-weights-hint {
  font-size: 0.62rem;
  letter-spacing: 1.5px;
  color: var(--tetris-faint);
  text-transform: lowercase;
  font-style: italic;
  opacity: 0.7;
}
.lt-weights-list {
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
}
.lt-weight-row {
  display: grid;
  grid-template-columns: minmax(60px, 7em) 1fr 3.2em;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
}
.lt-weight-label {
  color: var(--tetris-muted);
  letter-spacing: 0.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lt-weight-track {
  position: relative;
  height: 6px;
  background: rgba(237, 233, 254, 0.05);
  border-radius: 999px;
}
.lt-weight-track::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -1px;
  bottom: -1px;
  width: 1px;
  background: rgba(237, 233, 254, 0.18);
}
.lt-weight-fill {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 0%;
  border-radius: 999px;
  transition: width 0.45s ease;
}
.lt-weight-fill.is-pos {
  left: 50%;
  background: linear-gradient(90deg, rgba(79, 142, 247, 0.6), rgba(155, 110, 243, 0.95));
  box-shadow: 0 0 6px rgba(155, 110, 243, 0.35);
}
.lt-weight-fill.is-neg {
  right: 50%;
  background: linear-gradient(270deg, rgba(192, 132, 252, 0.6), rgba(220, 140, 200, 0.4));
  box-shadow: 0 0 6px rgba(192, 132, 252, 0.3);
}
.lt-weight-value {
  text-align: right;
  color: var(--tetris-text);
  opacity: 0.85;
}

/* ===== TETRIS! pre-flash ===== */
.lt-tetris-warning {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 200;
  letter-spacing: 8px;
  background: linear-gradient(135deg, #4F8EF7, #9B6EF3, #C084FC);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(192, 132, 252, 0.5);
  opacity: 0;
  z-index: 6;
}
.lt-tetris-warning.is-visible {
  animation: lt-tetris-pulse 0.9s ease-out forwards;
}
@keyframes lt-tetris-pulse {
  0%   { opacity: 0;   transform: scale(0.92); }
  20%  { opacity: 1;   transform: scale(1.04); }
  60%  { opacity: 0.9; transform: scale(1.0);  }
  100% { opacity: 0;   transform: scale(1.0);  }
}

@media (prefers-reduced-motion: reduce) {
  .lt-tetris-warning.is-visible { animation: none; opacity: 0; }
  .lt-gen-progress-fill,
  .lt-sigma-fill,
  .lt-weight-fill { transition: none; }
}

@media (max-width: 900px) {
  .lt-gen-progress { align-items: flex-start; }
  .lt-sigma { justify-content: flex-start; }
  .lt-weights-card { padding: 0.8rem 0.9rem; }
  .lt-weight-row { grid-template-columns: minmax(56px, 6em) 1fr 3em; font-size: 0.66rem; }
}