/* =============================================================
   Snake Tactical MVP — Stage (Palco da Cobrinha)
   Logic Bloom — Turquoise snake, soft-red apple
   ============================================================= */

.stage {
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
  z-index: 20;
}

.stage__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  border-bottom: 2px solid var(--border-dark);
  background: var(--bg-elevated);
  flex-shrink: 0;
}

.stage__title {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-bright);}

.stage__level {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-text-dim);  background: var(--color-badge-bg);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
}

.stage__stars {
  display: flex;
  gap: 0.125rem;
  align-items: center;
}

.stage__stars .star {
  font-size: 1rem;
  line-height: 1;
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

.stage__stars .star--lit {
  color: var(--color-executing);
  text-shadow: 0 0 0.5rem var(--color-executing-glow);
}

.stage__stars .star--empty {
  color: var(--color-text-ghost);
}

.stage__body {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm);
  background: var(--bg-app);
  position: relative;
  overflow: hidden;
}

/* ===== Grid 8x8 ===== */
.grid {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: min(25rem, 100%);
  min-width: 200px;
  aspect-ratio: 1;
  border: var(--border-width-game) solid var(--border-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-elevated);
  background: #0A0A0A;
}

.grid__row {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  flex: 1;
}

/* ===== Grid Cell ===== */
.grid__cell {
  position: relative;
  border: 0.5px solid var(--bg-grid-line);
  min-width: 20px;
  min-height: 20px;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.grid__cell--light { background: var(--bg-grid-light); }
.grid__cell--dark  { background: var(--bg-grid-dark); }

/* ===== Snake Head ===== */
.grid__cell--snake-head {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
  z-index: 10;
}

.snake-head-inner {
  width: 100%;
  height: 100%;
  background: var(--color-snake-head);
  border-radius: var(--radius-md);
  box-shadow: 0 0 0.9375rem var(--color-snake-glow);
  position: relative;
  overflow: hidden;
}

.snake-head-inner::before,
.snake-head-inner::after {
  content: '';
  position: absolute;
  width: 0.375rem;
  height: 0.375rem;
  background: var(--color-snake-eye);
  border-radius: 50%;
}

.snake-head-inner::before { top: 25%; }
.snake-head-inner::after  { bottom: 25%; }
.snake-head-inner::before,
.snake-head-inner::after { right: 0.375rem; }

.snake-head-inner--up    { transform: rotate(270deg); }
.snake-head-inner--right { transform: rotate(0deg); }
.snake-head-inner--down  { transform: rotate(90deg); }
.snake-head-inner--left  { transform: rotate(180deg); }

.snake-tongue {
  position: absolute;
  width: 0.5rem;
  height: 2px;
  background: var(--color-apple);
  border-radius: 1px;
  top: 50%;
  right: -2px;
  transform: translateY(-50%);
}

.grid__cell--snake-body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3px;
}

.snake-body-inner {
  width: 100%;
  height: 100%;
  background: var(--color-snake-body);
  border-radius: var(--radius-sm);
}

.snake-body-inner--far {   opacity: var(--snake-body-opacity-far); }
.snake-body-inner--mid { opacity: var(--snake-body-opacity-mid); }

/* ===== Apple ===== */
.grid__cell--apple {
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  animation: pulsarMaca 2s ease-in-out infinite;
}

.apple-inner {
  width: 75%;
  height: 75%;
  background: var(--color-apple);
  border-radius: 50%;
  box-shadow: 0 0 1.25rem var(--color-apple-glow);
  position: relative;
}

.apple-inner::before {
  content: '';
  position: absolute;
  top: 10%;
  left: 15%;
  width: 30%;
  height: 25%;
  background: var(--color-apple-highlight);
  border-radius: 50%;
}

.apple-inner::after {
  content: '';
  position: absolute;
  top: -15%;
  left: 50%;
  transform: translateX(-50%);
  width: 30%;
  height: 40%;
  background: var(--color-apple-stem);
  border-radius: var(--radius-sm);
}

.apple-leaf {
  position: absolute;
  top: -18%;
  left: 55%;
  width: 35%;
  height: 30%;
  background: var(--color-snake-body);
  border-radius: 100% 0 100% 0;
}

@keyframes pulsarMaca {
  0%, 100% { filter: brightness(1); }
  50%      { filter: brightness(1.25); }
}

/* ===== Wall / Obstacle ===== */
.grid__cell--wall {
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.wall-inner {
  width: 75%;
  height: 75%;
  background: var(--color-obstacle);
  border-radius: var(--radius-sm);
  box-shadow: inset 0 -0.125rem 0.25rem var(--color-wall-shadow);
  position: relative;
}

.wall-spike {
  position: absolute;
  width: 0;
  height: 0;
}

.wall-spike--top {
  top: -0.375rem;
  left: 50%;
  transform: translateX(-50%);
  border-left: 0.25rem solid transparent;
  border-right: 0.25rem solid transparent;
  border-bottom: 0.5rem solid var(--color-spike);
}

.wall-spike--right {
  top: 50%;
  right: -0.375rem;
  transform: translateY(-50%);
  border-top: 0.25rem solid transparent;
  border-bottom: 0.25rem solid transparent;
  border-left: 0.5rem solid var(--color-spike);
}

.wall-spike--bottom {
  bottom: -0.375rem;
  left: 50%;
  transform: translateX(-50%);
  border-left: 0.25rem solid transparent;
  border-right: 0.25rem solid transparent;
  border-top: 0.5rem solid var(--color-spike);
}

.wall-spike--left {
  top: 50%;
  left: -0.375rem;
  transform: translateY(-50%);
  border-top: 0.25rem solid transparent;
  border-bottom: 0.25rem solid transparent;
  border-right: 0.5rem solid var(--color-spike);
}

/* ===== Stage Footer ===== */
.stage__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem var(--space-md);
  background: var(--bg-elevated);
  border-top: 2px solid var(--border-dark);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-text-dim);  flex-shrink: 0;
}

.stage__status {
  color: var(--color-executing);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stage__apple-counter {
  color: var(--color-apple);
  font-weight: 700;
}

/* ===== Stage Controls ===== */
.stage-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-between);
  padding: var(--space-sm) 0;
}

.stage-btn--stop {
  background: var(--color-clear);
  color: var(--color-danger-text);
  box-shadow: var(--shadow-block);
  border-bottom: var(--border-width-game) solid var(--color-danger-shadow);
}

.stage-btn--stop:hover:not(:disabled) {
  background: var(--color-danger-hover);
}

.stage-info {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-surface);
  border-top: 1px solid var(--border-dark);
  flex-wrap: wrap;
}

/* ===== SVG Sprites ===== */
.sprite {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.sprite--snake-head {
  color: var(--color-snake-head);
  filter: drop-shadow(0 0 0.75rem var(--color-snake-glow));
}

.sprite--snake-body {
  color: var(--color-snake-body);
}

.sprite--snake-body--far {   opacity: var(--snake-body-opacity-far); }
.sprite--snake-body--mid { opacity: var(--snake-body-opacity-mid); }

.sprite--apple {
  filter: drop-shadow(0 0 0.5rem var(--color-apple-glow));
}

.sprite--wall {
  filter: drop-shadow(inset 0 -0.125rem 0.25rem var(--color-wall-shadow));
}

/* ===== Mobile ===== */
@media (max-width: 47.9375rem) {
  .stage {
    border-left: none;
    border-bottom: 2px solid var(--border-dark);
  }
  .stage__body { padding: var(--space-sm); }
}