:root {
  color-scheme: light dark;
  --blue: #2196f3;
  --yellow: #ffca28;
  --red: #ef5350;
  --green: #66bb6a;
  --background: #f7f7fb;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #666;
  --border: #d0d0d0;
  --success: #4caf50;
  --error: #f44336;
  font-family: "Inter", "Segoe UI", sans-serif;
}

/* Lobby Screen Styles */
.lobby-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--background) 0%, #e8e8f0 100%);
  padding: 1rem;
}

.lobby-container {
  background: var(--surface);
  border-radius: 20px;
  padding: 2rem;
  max-width: 400px;
  width: 100%;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.lobby-header {
  text-align: center;
  margin-bottom: 2rem;
}

.lobby-header h1 {
  background: linear-gradient(120deg, var(--blue), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0 0 0.5rem;
  font-size: 2.5rem;
}

.lobby-header .tagline {
  color: var(--muted);
  margin: 0;
}

.lobby-menu {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.lobby-btn {
  width: 100%;
  padding: 1rem 1.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  min-height: 56px;
}

.lobby-btn.primary {
  background: linear-gradient(135deg, var(--blue), #1976d2);
  color: white;
  box-shadow: 0 4px 14px rgba(33, 150, 243, 0.4);
}

.lobby-btn.secondary {
  background: var(--surface);
  color: var(--text);
  border: 2px solid var(--border);
}

.lobby-btn.small {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  min-height: 40px;
}

.lobby-btn:not(:disabled):hover {
  transform: translateY(-2px);
}

.lobby-btn:not(:disabled):active {
  transform: translateY(0) scale(0.98);
}

.lobby-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.lobby-btn.install-btn {
  background: linear-gradient(135deg, var(--green), #43a047);
  color: white;
  box-shadow: 0 4px 14px rgba(76, 175, 80, 0.4);
  margin-top: 0.5rem;
}

.lobby-btn.install-btn:not(:disabled):hover {
  box-shadow: 0 6px 20px rgba(76, 175, 80, 0.5);
}

.lobby-section {
  animation: fadeIn 0.3s ease;
}

.lobby-section h2 {
  text-align: center;
  margin: 0 0 1.5rem;
  color: var(--text);
}

.lobby-form {
  margin-bottom: 1.5rem;
}

.lobby-form label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.lobby-form select,
.lobby-form input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
}

.room-code-input {
  text-align: center;
  font-size: 1.5rem !important;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-family: monospace;
}

.hint-text {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.5rem 0 0;
  text-align: center;
}

.control-row {
  margin-top: 1rem;
}

.control-row label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.room-code-display {
  text-align: center;
  margin-bottom: 1.5rem;
}

.room-code-display p {
  margin: 0 0 0.5rem;
  color: var(--muted);
}

.room-code {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  font-family: monospace;
  background: linear-gradient(135deg, var(--blue), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding: 0.5rem;
  margin-bottom: 0.75rem;
}

.players-list {
  background: rgba(0, 0, 0, 0.03);
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.players-list h3 {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.players-list ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.players-list li {
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
  background: var(--surface);
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.players-list li:last-child {
  margin-bottom: 0;
}

.player-color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.player-color-dot[data-color="Blue"] { background: var(--blue); }
.player-color-dot[data-color="Yellow"] { background: var(--yellow); }
.player-color-dot[data-color="Red"] { background: var(--red); }
.player-color-dot[data-color="Green"] { background: var(--green); }

.player-name {
  flex: 1;
}

.player-you {
  font-size: 0.75rem;
  background: var(--blue);
  color: white;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.waiting-text {
  text-align: center;
  color: var(--muted);
  font-style: italic;
  margin: 1rem 0;
}

.your-color-display {
  text-align: center;
  margin-bottom: 1.5rem;
}

.your-color-display p {
  margin: 0 0 0.5rem;
  color: var(--muted);
}

.color-badge {
  display: inline-block;
  font-size: 1.5rem;
  font-weight: 700;
  padding: 0.75rem 2rem;
  border-radius: 12px;
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.color-badge[data-color="Blue"] { background: var(--blue); }
.color-badge[data-color="Yellow"] { background: var(--yellow); color: #333; text-shadow: none; }
.color-badge[data-color="Red"] { background: var(--red); }
.color-badge[data-color="Green"] { background: var(--green); }

.connection-status {
  text-align: center;
  padding: 2rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--blue);
  border-radius: 50%;
  margin: 0 auto 1rem;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.lobby-error {
  text-align: center;
  padding: 1rem;
  background: rgba(244, 67, 54, 0.1);
  border-radius: 12px;
  border: 1px solid var(--error);
}

.lobby-error p {
  color: var(--error);
  margin: 0 0 1rem;
  font-weight: 500;
}

/* Host Reclaim Prompt */
#host-reclaim-prompt {
  background: rgba(33, 150, 243, 0.1);
  border-color: var(--primary);
}

#host-reclaim-prompt h3 {
  color: var(--primary);
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

#host-reclaim-prompt p {
  color: var(--text);
  margin: 0 0 1rem;
}

.button-row {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.button-row .lobby-btn {
  flex: 1;
  min-width: 120px;
  max-width: 200px;
}

/* Debug Panel */
.debug-panel {
  margin-top: 1.5rem;
  padding: 0.75rem;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 8px;
  font-size: 0.75rem;
  font-family: monospace;
  max-height: 150px;
  overflow-y: auto;
  display: none; /* Hidden by default */
}

.debug-panel.visible {
  display: block;
}

.debug-panel h4 {
  margin: 0 0 0.5rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--muted);
}

#debug-log {
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--text);
  line-height: 1.4;
}

#debug-log .debug-error {
  color: var(--error);
}

#debug-log .debug-success {
  color: var(--success);
}

#debug-log .debug-info {
  color: var(--blue);
}

/* Game Screen Styles */
.game-screen {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.game-screen[hidden] {
  display: none;
}

.game-header-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: center;
  margin-top: 0.5rem;
}

.your-color-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.2);
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
}

.your-color-indicator::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: currentColor;
}

.your-color-indicator[data-color="Blue"] { color: var(--blue); }
.your-color-indicator[data-color="Yellow"] { color: var(--yellow); }
.your-color-indicator[data-color="Red"] { color: var(--red); }
.your-color-indicator[data-color="Green"] { color: var(--green); }

.room-code-small {
  font-size: 0.85rem;
  font-family: monospace;
  letter-spacing: 0.1em;
  background: rgba(255, 255, 255, 0.2);
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
}

.leave-game-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--muted);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  margin-top: 0.5rem;
  transition: all 0.2s ease;
}

.leave-game-btn:hover {
  background: rgba(239, 83, 80, 0.1);
  border-color: var(--red);
  color: var(--red);
}

/* Turn indicator for multiplayer */
.status-line .your-turn {
  background: var(--success);
  color: white;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  margin-left: 0.5rem;
}

.status-line .waiting-turn {
  background: var(--muted);
  color: white;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  margin-left: 0.5rem;
}

/* Disabled state for non-turn actions */
.not-your-turn .piece-card:not(.used) {
  opacity: 0.6;
  cursor: not-allowed;
}

.not-your-turn .button-group button:not(#pass) {
  opacity: 0.6;
  cursor: not-allowed;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  min-height: 100vh;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.app-header {
  padding: 1rem;
  padding-top: max(1rem, env(safe-area-inset-top));
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
  background: linear-gradient(120deg, var(--blue), var(--green));
  color: white;
  text-align: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.tagline {
  margin: 0.25rem 0 0;
  font-size: 0.95rem;
}

.app-main {
  flex: 1;
  display: grid;
  gap: 1rem;
  padding: 1rem;
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.controls,
.status-panel,
.board-section,
.inventory,
.scoreboard,
.log {
  background: var(--surface);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: space-between;
}

label {
  font-weight: 600;
}

select,
button {
  font-size: 1rem;
  padding: 0.5rem 0.75rem;
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: inherit;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  cursor: pointer;
}

button.primary {
  background: var(--blue);
  color: #fff;
  border-color: transparent;
}

button.secondary {
  background: #f0f0f5;
}

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

button:not(:disabled):active {
  transform: scale(0.97);
}

.status-line {
  margin-bottom: 0.5rem;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.board-section {
  grid-column: span 2;
}

.board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(20, minmax(0, 1fr));
  gap: 2px;
  width: min(90vw, 70vh);
  margin: 0 auto;
  touch-action: none;
}

.board-cell {
  position: relative;
  width: 100%;
  padding-top: 100%;
  border-radius: 4px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: #fff;
  overflow: hidden;
}

.board-cell::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s ease;
}

.board-cell button {
  position: absolute;
  inset: 0;
  border: none;
  background: transparent;
  padding: 0;
  touch-action: none;
}

.board-cell button:focus-visible {
  outline: 2px solid #333;
}

.board-cell[data-preview]::after {
  opacity: 1;
}

.board-cell[data-preview="valid"]::after {
  background: var(--preview-color, rgba(0, 0, 0, 0.15));
  opacity: 0.65;
}

.board-cell[data-preview="invalid"]::after {
  background: rgba(239, 83, 80, 0.55);
  box-shadow: inset 0 0 0 2px rgba(183, 28, 28, 0.6);
}

.board-cell[data-color="Blue"] {
  background: var(--blue);
}

.board-cell[data-color="Yellow"] {
  background: var(--yellow);
}

.board-cell[data-color="Red"] {
  background: var(--red);
}

.board-cell[data-color="Green"] {
  background: var(--green);
}

.inventory h2,
.scoreboard h2,
.log h2 {
  margin-top: 0;
}

.inventory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: 0.75rem;
}

.piece-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.5rem;
  min-height: 88px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.02), rgba(0, 0, 0, 0.08));
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.piece-card:not(:disabled):active {
  transform: scale(0.97);
}

.piece-card.selected {
  outline: 3px solid currentColor;
  outline-offset: 2px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(0, 0, 0, 0.05));
  box-shadow: 0 0 12px currentColor;
}

.piece-card[data-owned="false"] {
  opacity: 0.4;
  pointer-events: none;
}

/* Board ghost - draggable piece preview on the board */
.board-ghost {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

.board-ghost.dragging {
  cursor: grabbing;
}

.ghost-piece-cell {
  position: absolute;
  border-radius: 4px;
  pointer-events: auto;
  cursor: grab;
  touch-action: none;
  /* Ghost-like: transparent with dashed border */
  background: transparent;
  border: 3px dashed var(--ghost-color, #666);
  opacity: 0.8;
  animation: ghost-pulse 1.5s ease-in-out infinite;
}

@keyframes ghost-pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 0.9; }
}

.ghost-piece-cell[data-valid="true"] {
  border-color: var(--ghost-color, #666);
  box-shadow: inset 0 0 8px var(--ghost-color, #666);
  background: color-mix(in srgb, var(--ghost-color, #666) 20%, transparent);
}

.ghost-piece-cell[data-valid="false"] {
  /* Use diagonal stripes pattern - distinct from any player color */
  border-color: #888;
  border-style: solid;
  box-shadow: none;
  background: repeating-linear-gradient(
    45deg,
    rgba(100, 100, 100, 0.3),
    rgba(100, 100, 100, 0.3) 4px,
    rgba(200, 200, 200, 0.2) 4px,
    rgba(200, 200, 200, 0.2) 8px
  );
  opacity: 0.7;
  animation: ghost-invalid-pulse 0.8s ease-in-out infinite;
}

@keyframes ghost-invalid-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.8; }
}

@keyframes ghost-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-2px); }
  75% { transform: translateX(2px); }
}

.board-ghost.dragging .ghost-piece-cell {
  cursor: grabbing;
  animation: none;
  opacity: 0.9;
}

.piece-name {
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(5, 12px);
  grid-template-rows: repeat(5, 12px);
  gap: 2px;
  justify-content: center;
}

.mini-cell {
  width: 12px;
  height: 12px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 2px;
}

.mini-cell.filled {
  background: currentColor;
}

.scoreboard table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.scoreboard th,
.scoreboard td {
  text-align: left;
  padding: 0.5rem 0.25rem;
  border-bottom: 1px solid var(--border);
}

.scoreboard th:first-child,
.scoreboard td:first-child {
  padding-left: 0;
}

.scoreboard th:last-child,
.scoreboard td:last-child {
  padding-right: 0;
}

.log ol,
.log ul {
  margin: 0;
  padding-left: 1.5rem;
}

.app-footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Tablet and below */
@media (max-width: 768px) {
  .board-section {
    grid-column: span 1;
  }

  .board {
    width: min(92vw, 92vw);
  }

  .mini-grid {
    grid-template-columns: repeat(5, 10px);
    grid-template-rows: repeat(5, 10px);
  }
}

/* Portrait orientation optimization */
@media (orientation: portrait) {
  .app-main {
    grid-template-columns: 1fr;
    padding: 0.75rem;
    gap: 0.75rem;
  }

  .board-section {
    grid-column: span 1;
    order: 1;
  }

  .status-panel {
    order: 0;
  }

  .controls {
    order: -1;
  }

  .board {
    width: min(92vw, 50vh);
    max-width: 500px;
  }

  .inventory {
    order: 2;
  }

  .scoreboard {
    order: 3;
  }

  .log {
    order: 4;
  }

  .app-header {
    padding: 0.75rem;
  }

  .app-header h1 {
    font-size: 1.5rem;
    margin: 0;
  }

  .tagline {
    font-size: 0.85rem;
  }
}

/* Small phones (iPhone SE, Galaxy S8, etc.) */
@media (max-width: 414px) {
  .app-main {
    padding: 0.5rem;
    gap: 0.5rem;
  }

  .controls,
  .status-panel,
  .board-section,
  .inventory,
  .scoreboard,
  .log {
    padding: 0.75rem;
    border-radius: 8px;
  }

  .inventory-grid {
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 0.5rem;
  }

  button,
  select {
    font-size: 0.95rem;
  }

  .button-group {
    gap: 0.4rem;
  }
}

/* Extra small phones */
@media (max-width: 375px) {
  .app-header h1 {
    font-size: 1.3rem;
  }

  .tagline {
    font-size: 0.8rem;
  }

  .inventory-grid {
    grid-template-columns: repeat(auto-fit, minmax(75px, 1fr));
  }

  .piece-card {
    padding: 0.4rem;
    min-height: 80px;
  }

  .piece-name {
    font-size: 0.75rem;
  }

  .mini-grid {
    grid-template-columns: repeat(5, 9px);
    grid-template-rows: repeat(5, 9px);
    gap: 1px;
  }

  .mini-cell {
    width: 9px;
    height: 9px;
  }

  button,
  select {
    font-size: 0.9rem;
    padding: 0.4rem 0.6rem;
  }

  .scoreboard table {
    font-size: 0.85rem;
  }

  .scoreboard th,
  .scoreboard td {
    padding: 0.4rem 0.2rem;
  }

  h2 {
    font-size: 1.1rem;
  }
}

/* Landscape orientation on small screens */
@media (orientation: landscape) and (max-height: 500px) {
  .app-header {
    padding: 0.5rem;
  }

  .app-header h1 {
    font-size: 1.2rem;
    margin: 0;
  }

  .tagline {
    display: none;
  }

  .app-main {
    padding: 0.5rem;
    gap: 0.5rem;
  }

  .board {
    width: min(50vw, 85vh);
  }

  .board-section {
    grid-column: span 2;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0f1116;
    --surface: #191c23;
    --text: #f4f6ff;
    --muted: #c2c7d2;
    --border: #2a2e39;
  }

  select,
  button {
    background: #11141c;
  }

  button.secondary {
    background: #1f232d;
  }

  .board-cell {
    border-color: rgba(255, 255, 255, 0.06);
    background: #11141c;
  }

  /* Dark mode lobby */
  .lobby-screen {
    background: linear-gradient(135deg, var(--background) 0%, #1a1d25 100%);
  }

  .lobby-container {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  }

  .lobby-btn.secondary {
    background: var(--surface);
    border-color: var(--border);
  }

  .lobby-form select,
  .lobby-form input {
    background: #11141c;
    border-color: var(--border);
  }

  .players-list {
    background: rgba(255, 255, 255, 0.03);
  }

  .players-list li {
    background: #11141c;
  }

  .lobby-error {
    background: rgba(244, 67, 54, 0.15);
  }
}