:root {
  --bg: #0a0a0a;
  --fg: #00ff41;
  --fg-dim: #00aa2a;
  --fg-bright: #55ff77;
  --glow: rgba(0, 255, 65, 0.4);
  --glow-strong: rgba(0, 255, 65, 0.8);
  --border: #00ff41;
  --input-bg: #0d0d0d;
  --btn-hover: #00ff41;
  --amber: #ffb000;
  --amber-dim: #aa7700;
  --amber-glow: rgba(255, 176, 0, 0.4);
  --font: 'Courier New', 'Consolas', 'Liberation Mono', monospace;
  --room-color: #00ffcc;
  --combat-color: #ff4444;
  --hint-color: #ffff00;
  --effect-color: #ff8800;
  --warning-color: #ff6600;
}

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

/* Touch optimizations */
html {
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
}

button, input {
  touch-action: manipulation;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  overflow: hidden;
}

/* --- INTRO SCREEN --- */
#intro-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  text-align: center;
  animation: fadeIn 1s ease;
}

#intro-screen h1 {
  font-size: 3rem;
  color: var(--fg);
  text-shadow: 0 0 20px var(--glow-strong), 0 0 40px var(--glow);
  letter-spacing: 0.3em;
  margin-bottom: 0.5rem;
}

#intro-screen h2 {
  font-size: 1.2rem;
  color: var(--fg-dim);
  font-weight: normal;
  font-style: italic;
  margin-bottom: 2rem;
}

#intro-screen .author {
  color: var(--fg-dim);
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}

#intro-screen .author.adaptation {
  font-size: 0.75rem;
  margin-bottom: 1.5rem;
}

#intro-part-toggle {
  display: flex;
  gap: 12px;
  margin-bottom: 1rem;
}

#intro-part-toggle .part-btn {
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--fg-dim);
  padding: 8px 24px;
  font-family: inherit;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: all 0.2s;
}

#intro-part-toggle .part-btn.active {
  color: var(--fg);
  border-color: var(--fg);
  background: rgba(0, 255, 65, 0.1);
}

#intro-part-toggle .part-btn:hover {
  color: var(--fg);
  border-color: var(--fg);
}

#intro-lang-toggle {
  display: flex;
  gap: 12px;
  margin-bottom: 2rem;
}

#intro-lang-toggle .lang-btn {
  padding: 6px 18px;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

#intro-story {
  max-width: 650px;
  text-align: left;
  color: var(--fg-dim);
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  max-height: 300px;
  overflow-y: auto;
  padding: 0 1rem;
}

#intro-story::-webkit-scrollbar { width: 4px; }
#intro-story::-webkit-scrollbar-track { background: var(--bg); }
#intro-story::-webkit-scrollbar-thumb { background: var(--fg-dim); }

#start-btn {
  background: transparent;
  color: var(--fg);
  border: 2px solid var(--fg);
  padding: 12px 40px;
  font-family: var(--font);
  font-size: 1.1rem;
  cursor: pointer;
  letter-spacing: 0.1em;
  transition: all 0.3s;
}

#start-btn:hover {
  background: var(--fg);
  color: var(--bg);
  box-shadow: 0 0 20px var(--glow-strong);
}

/* --- MAIN LAYOUT --- */
#game-container {
  display: none;
  grid-template-columns: 1fr 280px;
  grid-template-rows: auto 1fr auto auto;
  height: 100vh;
  height: 100dvh;
  height: var(--viewport-height, 100dvh);
  gap: 8px;
  padding: 8px;
}

#game-container.active {
  display: grid;
}

/* --- HEADER --- */
#header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  border: 1px solid var(--fg-dim);
  border-radius: 4px;
  background: rgba(0, 255, 65, 0.03);
}

#header h1 {
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  color: var(--fg);
  text-shadow: 0 0 8px var(--glow);
}

#header-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

.lang-btn {
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--fg-dim);
  padding: 2px 8px;
  font-family: var(--font);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-btn.active {
  color: var(--fg);
  border-color: var(--fg);
  background: rgba(0, 255, 65, 0.1);
}

.lang-btn:hover { color: var(--fg); border-color: var(--fg); }

#sound-btn, #restart-btn, #map-btn {
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--fg-dim);
  padding: 2px 8px;
  font-family: var(--font);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

#sound-btn:hover, #restart-btn:hover, #map-btn:hover {
  color: var(--fg);
  border-color: var(--fg);
}

/* --- TERMINAL --- */
#terminal {
  grid-column: 1;
  grid-row: 2;
  background: var(--bg);
  border: 1px solid var(--fg-dim);
  border-radius: 4px;
  padding: 16px;
  overflow-y: auto;
  position: relative;
}

#terminal::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 255, 65, 0.03) 0px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  border-radius: 4px;
}

#terminal::-webkit-scrollbar { width: 6px; }
#terminal::-webkit-scrollbar-track { background: var(--bg); }
#terminal::-webkit-scrollbar-thumb { background: var(--fg-dim); border-radius: 3px; }

.terminal-line {
  text-shadow: 0 0 4px var(--glow);
  margin-bottom: 2px;
  word-wrap: break-word;
}

.terminal-line.room-name {
  color: var(--room-color);
  font-weight: bold;
  text-shadow: 0 0 8px rgba(0, 255, 204, 0.5);
}

.terminal-line.room-desc { color: var(--fg-dim); }
.terminal-line.list-header { color: var(--fg); margin-top: 8px; }
.terminal-line.list-item { color: var(--fg-dim); }
.terminal-line.combat { color: var(--combat-color); text-shadow: 0 0 8px rgba(255, 68, 68, 0.5); }
.terminal-line.hint { color: var(--hint-color); text-shadow: 0 0 6px rgba(255, 255, 0, 0.4); }
.terminal-line.effect { color: var(--effect-color); font-weight: bold; }
.terminal-line.warning { color: var(--warning-color); }
.terminal-line.death { color: var(--combat-color); font-weight: bold; font-size: 1.1em; }
.terminal-line.victory { color: var(--hint-color); font-weight: bold; font-size: 1.1em; text-shadow: 0 0 15px rgba(255, 255, 0, 0.6); }
.terminal-line.passage { color: var(--fg-dim); font-style: italic; }
.terminal-line.input-echo { color: var(--fg-bright); }
.terminal-line.input-echo::before { content: '> '; color: var(--fg); }
.terminal-line.separator { border-bottom: 1px solid rgba(0, 255, 65, 0.15); margin: 8px 0; height: 0; }

/* --- SIDEBAR --- */
#sidebar {
  grid-column: 2;
  grid-row: 2 / 5;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}

.panel {
  border: 1px solid var(--fg-dim);
  border-radius: 4px;
  padding: 12px;
  background: rgba(0, 255, 65, 0.02);
}

.panel h3 {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg);
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(0, 255, 65, 0.2);
}

/* Inventory panel */
#inventory-list {
  list-style: none;
  font-size: 0.8rem;
}

#inventory-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2px 0;
  color: var(--fg-dim);
}

#inventory-list li .inv-item-name {
  cursor: pointer;
  transition: color 0.2s;
  flex: 1;
}

#inventory-list li .inv-item-name:hover {
  color: var(--fg);
}

#inventory-list li .inv-item-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

#inventory-list li .item-weight {
  color: var(--fg-dim);
  opacity: 0.6;
}

.inv-drop-btn {
  background: transparent;
  color: var(--combat-color);
  border: 1px solid rgba(255, 68, 68, 0.3);
  border-radius: 2px;
  padding: 0 4px;
  font-family: var(--font);
  font-size: 0.65rem;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1.4;
}

.inv-drop-btn:hover {
  background: var(--combat-color);
  color: var(--bg);
  border-color: var(--combat-color);
}

#weight-bar {
  margin-top: 8px;
  height: 6px;
  background: rgba(0, 255, 65, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

#weight-fill {
  height: 100%;
  background: var(--fg);
  border-radius: 3px;
  transition: width 0.3s;
  box-shadow: 0 0 6px var(--glow);
}

#weight-text {
  font-size: 0.7rem;
  color: var(--fg-dim);
  margin-top: 4px;
}

/* Location panel */
#location-name {
  color: var(--room-color);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

#exits-list {
  list-style: none;
  font-size: 0.8rem;
}

#exits-list li {
  color: var(--fg-dim);
  padding: 1px 0;
  cursor: pointer;
  transition: color 0.2s;
}

#exits-list li:hover { color: var(--fg); }
#exits-list li::before { content: '\1F6AA '; }
#exits-list li.exit-danger { color: var(--combat-color); }
#exits-list li.exit-danger::before { content: '\26A0\FE0F '; }
#exits-list li.exit-danger:hover { color: #ff6666; }

#progress-text {
  font-size: 0.7rem;
  color: var(--fg-dim);
  margin-top: 8px;
}

/* --- QUICK ACTIONS --- */
#quick-actions {
  grid-column: 1;
  grid-row: 3;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px 0;
  max-height: 80px;
  overflow-y: auto;
}

.quick-btn {
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid rgba(0, 255, 65, 0.3);
  border-radius: 3px;
  padding: 3px 10px;
  font-family: var(--font);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.quick-btn:hover {
  color: var(--bg);
  background: var(--fg);
  border-color: var(--fg);
  box-shadow: 0 0 8px var(--glow);
}

.quick-btn.door-btn { border-color: rgba(0, 255, 204, 0.4); color: var(--room-color); }
.quick-btn.door-btn:hover { background: var(--room-color); border-color: var(--room-color); }
.quick-btn.item-btn { border-color: rgba(255, 176, 0, 0.4); color: var(--amber); }
.quick-btn.item-btn:hover { background: var(--amber); border-color: var(--amber); }
.quick-btn.npc-btn { border-color: rgba(255, 255, 0, 0.4); color: var(--hint-color); }
.quick-btn.npc-btn:hover { background: var(--hint-color); border-color: var(--hint-color); }
.quick-btn.hidden-btn { border-color: rgba(255, 136, 0, 0.4); color: var(--effect-color); }
.quick-btn.hidden-btn:hover { background: var(--effect-color); border-color: var(--effect-color); }
.quick-btn.danger-btn { border-color: rgba(255, 68, 68, 0.5); color: var(--combat-color); }
.quick-btn.danger-btn:hover { background: var(--combat-color); border-color: var(--combat-color); }
.quick-btn.action-btn { border-color: rgba(0, 255, 65, 0.4); }

/* --- INPUT --- */
#input-area {
  grid-column: 1;
  grid-row: 4;
  display: flex;
  gap: 8px;
  align-items: center;
}

#command-input {
  flex: 1;
  background: var(--input-bg);
  color: var(--fg);
  border: 1px solid var(--fg-dim);
  border-radius: 4px;
  padding: 8px 12px;
  font-family: var(--font);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

#command-input:focus {
  border-color: var(--fg);
  box-shadow: 0 0 8px var(--glow);
}

#command-input::placeholder { color: rgba(0, 255, 65, 0.3); }

#send-btn {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--fg-dim);
  border-radius: 4px;
  padding: 8px 16px;
  font-family: var(--font);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
}

#send-btn:hover {
  background: var(--fg);
  color: var(--bg);
}

/* --- ANIMATIONS --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes typeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.terminal-line {
  animation: typeIn 0.15s ease;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  #game-container.active {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto auto auto;
  }

  #sidebar {
    grid-column: 1;
    grid-row: 5;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    gap: 8px;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    padding-bottom: 8px;
  }

  #sidebar::after {
    content: '';
    flex-shrink: 0;
    width: 8px;
  }

  .panel {
    min-width: 200px;
    flex-shrink: 0;
    scroll-snap-align: start;
  }

  #terminal { min-height: 300px; }

  /* Touch-friendly quick action buttons */
  .quick-btn {
    min-height: 44px;
    min-width: 44px;
    padding: 8px 14px;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* Touch-friendly header buttons */
  .lang-btn,
  #restart-btn,
  #sound-btn,
  #map-btn {
    min-height: 44px;
    min-width: 44px;
    padding: 6px 12px;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* Touch-friendly send button */
  #send-btn {
    min-height: 44px;
    min-width: 48px;
    padding: 10px 18px;
  }

  /* Touch-friendly exit list items */
  #exits-list li {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 4px 0;
  }

  /* Touch-friendly inventory drop button */
  .inv-drop-btn {
    min-height: 32px;
    min-width: 32px;
    font-size: 0.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  #inventory-list li .inv-item-name {
    min-height: 36px;
    display: flex;
    align-items: center;
  }

  /* Prevents iOS zoom on input focus */
  #command-input {
    font-size: 16px;
    padding: 10px 12px;
    min-height: 44px;
  }

  /* Quick actions area: more room on mobile */
  #quick-actions {
    max-height: 120px;
    gap: 6px;
    padding: 6px 0;
  }

  /* Input area stays visible above keyboard */
  #input-area {
    position: sticky;
    bottom: 0;
    background: var(--bg);
    padding: 6px 0;
    z-index: 10;
  }

  /* Intro screen: scrollable on mobile */
  #intro-screen {
    padding: 1.5rem 1rem;
    justify-content: flex-start;
    padding-top: 10vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  #intro-screen h1 { font-size: 2rem; }

  #intro-story {
    font-size: 0.8rem;
    max-height: none;
    overflow-y: visible;
    padding: 0 0.5rem;
  }

  #start-btn {
    min-height: 48px;
    padding: 14px 40px;
    font-size: 1rem;
    margin-bottom: 2rem;
  }

  #intro-lang-toggle .lang-btn {
    min-height: 44px;
    min-width: 44px;
  }
}

@media (max-width: 480px) {
  body { font-size: 13px; }

  #game-container.active { padding: 4px; gap: 4px; }

  .panel { padding: 8px; }

  #intro-screen { padding-top: 5vh; }

  #intro-screen h1 { font-size: 1.5rem; letter-spacing: 0.15em; }

  #intro-screen h2 {
    font-size: 1rem;
    margin-bottom: 1rem;
  }

  #intro-screen .author.adaptation {
    margin-bottom: 1.5rem;
  }
}