* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  min-height: 100vh;
  background: #0c0a0f;
  color: #8b8494;
  font-family: 'Exo 2', sans-serif;
  overflow: hidden;
}

#canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  transition: width 0.25s ease;
}
body.panel-open #canvas { width: calc(100vw - 280px); }

.ui {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.snap-btn.gauntlet-btn {
  display: block;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.snap-btn.gauntlet-btn:hover:not(:disabled) {
  transform: scale(1.08);
}

.snap-btn.gauntlet-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.snap-btn.gauntlet-btn.snap-feedback {
  animation: snap-flash 0.5s ease;
}

@keyframes snap-flash {
  0% { filter: brightness(1); }
  50% { filter: brightness(1.4); }
  100% { filter: brightness(1); }
}

.gauntlet-img {
  display: block;
  object-fit: contain;
}

.snap-quote {
  font-size: 0.9rem;
  font-style: italic;
  color: #6b5d7a;
  text-align: center;
  max-width: 22em;
  min-height: 1.4em;
  line-height: 1.35;
}

.message {
  font-size: 0.95rem;
  min-height: 1.5em;
  color: #522081;
  text-align: center;
}

.message.final {
  font-family: 'Orbitron', sans-serif;
  color: #6b5d4f;
  letter-spacing: 0.05em;
}

.reset-btn {
  font-family: 'Exo 2', sans-serif;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  border: 1px solid #2d2838;
  border-radius: 4px;
  background: transparent;
  color: #5a5368;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.reset-btn:hover {
  background: #1a1720;
  color: #7a7288;
}

.tooltip {
  position: fixed;
  padding: 0.5rem 0.75rem;
  background: rgba(26, 23, 32, 0.95);
  border: 1px solid #2d2838;
  border-radius: 6px;
  font-size: 0.9rem;
  color: #c4b8d4;
  pointer-events: none;
  z-index: 20;
  opacity: 0;
  transition: opacity 0.15s;
}

.tooltip.visible { opacity: 1; }

.header-area {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 1rem 0.5rem 0.5rem;
  pointer-events: none;
}
.header-area .title-toggle {
  pointer-events: auto;
}
.header-area .hint {
  position: static;
  transform: none;
}
.title-toggle {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: clamp(1.2rem, 4vw, 1.8rem);
  color: #522081;
  letter-spacing: 0.15em;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.2s;
}
.title-toggle:hover { color: #7c3aed; }
.title-chevron {
  font-size: 0.75em;
  opacity: 0.9;
  transition: transform 0.25s ease;
}
body.panel-open .title-chevron { transform: rotate(180deg); }

.side-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  height: 100vh;
  height: 100dvh;
  z-index: 15;
  background: rgba(18, 15, 24, 0.97);
  border-left: 1px solid #2d2838;
  padding: 1.25rem 1rem;
  padding-top: 4rem;
  padding-bottom: 3rem;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
  transform: translateX(100%);
  transition: transform 0.25s ease;
  box-shadow: -4px 0 24px rgba(0,0,0,0.3);
}
.side-panel.open {
  transform: translateX(0);
}
.panel-close {
  position: absolute;
  top: 0.6rem;
  right: 0.75rem;
  left: 0.75rem;
  padding: 0.4rem 0.75rem;
  font-family: 'Exo 2', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: #a78bfa;
  background: rgba(82, 32, 129, 0.3);
  border: 1px solid #522081;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  min-height: 36px;
  -webkit-tap-highlight-color: transparent;
}
.panel-close:hover,
.panel-close:focus {
  background: rgba(82, 32, 129, 0.5);
  color: #c4b8d4;
}
.panel-section {
  margin-bottom: 1rem;
}
.panel-section:last-child {
  margin-bottom: 0;
  padding-bottom: 2rem;
}
.panel-heading {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #6b5d7a;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}
.panel-row, .panel-complexity, .panel-note {
  font-size: 0.85rem;
  color: #a89bb8;
  margin-bottom: 0.25rem;
}
.panel-label {
  display: inline-block;
  min-width: 5.5em;
  color: #6b5d7a;
  font-size: 0.8rem;
}
.panel-label-after { margin-top: 0.5rem; }
.panel-array, .panel-result {
  font-size: 0.8rem;
  font-family: ui-monospace, monospace;
  color: #c4b8d4;
  background: rgba(45, 40, 56, 0.6);
  border-radius: 4px;
  padding: 0.5rem 0.6rem;
  margin-top: 0.25rem;
  word-break: break-word;
  line-height: 1.4;
}
.panel-array-after { margin-top: 0.25rem; }
.panel-result { min-height: 1.5em; }
.panel-done { font-size: 0.85em; color: #6b9c7a; }

.hint {
  font-size: 0.8rem;
  color: #4a4556;
  margin: 0;
  text-align: center;
}

/* Mobile-friendly */
@media (max-width: 600px) {
  .header-area {
    padding-top: max(1rem, env(safe-area-inset-top));
    gap: 0.35rem;
  }
  .title-toggle {
    font-size: clamp(1rem, 5vw, 1.35rem);
    letter-spacing: 0.08em;
    padding: 0.4rem 0.5rem;
    min-height: 44px;
    align-items: center;
  }
  .hint {
    font-size: 0.75rem;
    padding: 0 0.5rem;
    max-width: 90%;
  }
  .ui {
    bottom: max(1rem, env(safe-area-inset-bottom));
    gap: 0.5rem;
  }
  .gauntlet-img {
    width: 90px;
    height: 90px;
  }
  .snap-quote {
    font-size: 0.8rem;
    max-width: 18em;
  }
  .message {
    font-size: 0.85rem;
  }
  .reset-btn {
    padding: 0.6rem 1rem;
    min-height: 44px;
  }
  .side-panel {
    width: 100%;
    max-width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
    padding-top: 4.25rem;
    padding-bottom: 4rem;
  }
  body.panel-open #canvas {
    width: 0;
  }
  .panel-close {
    left: 1rem;
    right: 1rem;
  }
}

@media (max-width: 380px) {
  .title-toggle { font-size: 1rem; }
  .hint { font-size: 0.7rem; }
  .gauntlet-img {
    width: 80px;
    height: 80px;
  }
}

.file-protocol-warning {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 100;
  max-width: 90%;
  padding: 1.5rem 2rem;
  background: #1a1720;
  border: 1px solid #3d3540;
  border-radius: 8px;
  color: #c4b8d4;
  font-size: 0.95rem;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.file-protocol-warning p { margin: 0.5rem 0; }

.file-protocol-warning code {
  padding: 0.2rem 0.5rem;
  background: #2d2838;
  border-radius: 4px;
  font-family: ui-monospace, monospace;
}