:root {
  /* Primary Colors */
  --color-sage-light: #c8d5d0;
  --color-forest-green: #2d5a4a;
  --color-forest-dark: #1a2b26;
  --color-ocean-green: #3d7a6b;
  --color-mint-medium: #5a7a70;

  /* Secondary Colors */
  --color-mint-light: #9fb3ad;
  --color-mint-hover: #8a9f99;
  --color-mint-active: #758a85;
  --color-cream: #e8dfd0;
  --color-coral: #b85c7a;

  /* Spacing */
  --spacing-xs: 6px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 40px;
  --spacing-2xl: 60px;

  /* Border Radius */
  --radius-sm: 4px;

  /* Transitions */
  --transition-default: 0.15s ease;
}

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

body {
  font-family: "DM Mono", monospace;
  font-weight: 400;
  font-style: normal;
  background: var(--color-sage-light);
  color: var(--color-forest-dark);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: var(--spacing-xl) 20px;
}

.container {
  display: flex;
  gap: var(--spacing-2xl);
  align-items: center;
}

.left-section {
  display: flex;
  flex-direction: column;
  align-items: center;
}

h1 {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: var(--spacing-lg);
  color: var(--color-forest-green);
}

.grid {
  display: grid;
  grid-template-columns: repeat(25, 25px);
  grid-template-rows: repeat(25, 25px);
  gap: 1px;
  background: var(--color-mint-medium);
  border: 1px solid var(--color-mint-medium);
  border-radius: var(--radius-sm);
  padding: 1px;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

.cell {
  width: 25px;
  height: 25px;
  background: var(--color-mint-light);
  cursor: pointer;
  transition: background var(--transition-default);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-forest-dark);
  overflow: hidden;
}

.cell:hover {
  background: var(--color-mint-hover);
}

.cell:focus {
  background: var(--color-mint-active);
  outline: 2px solid var(--color-ocean-green);
  outline-offset: -2px;
}

.entity-sprite {
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.right-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.timer {
  background: var(--color-ocean-green);
  color: var(--color-cream);
  padding: var(--spacing-sm) 28px;
  border-radius: var(--radius-sm);
  text-align: center;
}

.timer-label {
  font-size: 0.8rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-xs);
  opacity: 0.85;
}

.timer-value {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 3px;
}

.controls {
  display: flex;
  gap: var(--spacing-xs);
}

.control-button {
  background: var(--color-coral);
  color: var(--color-cream);
  border: 2px solid var(--color-coral);
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background var(--transition-default),
    border-color var(--transition-default), opacity var(--transition-default);
  flex: 1;
  font-family: "DM Mono", monospace;
}

.control-button:hover:not(:disabled) {
  background: var(--color-ocean-green);
  border-color: var(--color-ocean-green);
}

.control-button:active:not(:disabled) {
  transform: translateY(2px);
}

.control-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.icon-button {
  padding: 14px;
  flex: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.entity-selector {
  display: flex;
  gap: var(--spacing-xs);
  justify-content: center;
}

.entity-option {
  width: 48px;
  height: 48px;
  background: var(--color-mint-light);
  border: 2px solid var(--color-mint-medium);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-forest-dark);
  cursor: pointer;
  transition: background var(--transition-default),
    border-color var(--transition-default);
}

.entity-option:hover {
  background: var(--color-mint-hover);
}

.entity-option.selected {
  background: var(--color-ocean-green);
  border-color: var(--color-ocean-green);
  color: var(--color-cream);
}

.entity-option.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.selector-sprite {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  padding: 4px;
}

.rules {
  background: rgba(93, 122, 112, 0.15);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm);
  border: 1px solid var(--color-mint-medium);
}

.rules h3 {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: var(--spacing-xs);
  color: var(--color-forest-green);
  text-align: center;
}

.rule-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
  font-size: 0.7rem;
  line-height: 1.4;
  color: var(--color-forest-dark);
}

.rule-item:last-of-type {
  margin-bottom: var(--spacing-xs);
}

.rule-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  object-fit: contain;
}

.rule-note {
  font-size: 0.65rem;
  text-align: center;
  color: var(--color-forest-green);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: var(--spacing-xs);
  padding-top: var(--spacing-xs);
  border-top: 1px solid var(--color-mint-medium);
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(26, 43, 38, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 1000;
}

.modal.visible {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--color-sage-light);
  padding: var(--spacing-xl);
  border-radius: var(--radius-sm);
  border: 3px solid var(--color-ocean-green);
  text-align: center;
  max-width: 400px;
}

.modal-content h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-forest-green);
  margin-bottom: var(--spacing-md);
}

.modal-content p {
  font-size: 1.1rem;
  color: var(--color-forest-dark);
  margin-bottom: var(--spacing-lg);
}