:root {
    --bg-color: #0000ff; /* BRIGHT BLUE - VERSION 3 */
    --panel-color: #2a2a2a;
    --accent-color: #3d5afe;
    --text-color: #e0e0e0;
    --border-color: #444;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
    height: 100vh;
}

#app {
    display: flex;
    height: 100vh;
    width: 100vw;
}

.sidebar {
    width: 300px;
    padding: 20px;
    background-color: var(--panel-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.right-sidebar {
    border-right: none;
    border-left: 1px solid var(--border-color);
}

.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-color: #111;
}

.panel {
    background-color: #333;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

h2 {
    margin-top: 0;
    font-size: 1.2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.control-group {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

label {
    font-size: 0.9rem;
    color: #bbb;
}

select, button {
    background-color: #444;
    color: white;
    border: 1px solid #555;
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
}

button {
    background-color: var(--accent-color);
    border: none;
    font-weight: bold;
    margin-top: 10px;
    width: 100%;
    transition: background 0.2s;
}

button:hover {
    background-color: #536dfe;
}

.game-container {
    display: flex;
    gap: 30px;
    height: 100%;
    width: 100%;
    align-items: center;
    justify-content: center;
    padding: 0;
    box-sizing: border-box;
}

#board-layout {
    display: flex;
    flex-direction: column;
    height: auto;
    justify-content: center;
    align-items: center;
}

#eval-bar-container {
    width: 30px;
    background-color: #000; /* Black for Black's advantage */
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    height: calc(60vh + 10px); /* Board + Captured Rows height */
    max-height: calc(80vw + 80px);
    border: 2px solid #444;
}

#eval-bar-background {
    flex: 1;
    width: 100%;
    background-color: #000;
    display: flex;
    flex-direction: column-reverse; /* White fills from bottom */
    position: relative;
}

#eval-white-fill {
    width: 100%;
    height: 50%;
    background-color: #fff; /* White for White's advantage */
    transition: height 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.eval-text {
    height: 30px;
    line-height: 30px;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 900;
    color: white;
    z-index: 10;
}

#board-wrapper {
    width: 60vh;
    height: 60vh;
    max-width: 80vw;
    max-height: 80vw;
    position: relative;
    background-color: #333;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    flex-shrink: 0;
}

canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.hidden {
    display: none !important;
}

#setup-controls {
    border: 2px solid #ffeb3b; /* Bright yellow border */
    padding: 10px;
    border-radius: 4px;
    margin-top: 10px;
    background: rgba(255, 235, 59, 0.1);
}

.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #2a2a2a;
    padding: 25px;
    border: 2px solid var(--accent-color);
    border-radius: 12px;
    z-index: 500;
    box-shadow: 0 0 100px rgba(0,0,0,0.8);
    width: 350px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.popup h3 {
    margin: 0;
    border-bottom: 1px solid #444;
    padding-bottom: 10px;
}

.cancel-btn {
    background-color: #555;
    margin-top: 0;
}

.cancel-btn:hover {
    background-color: #666;
}

#host-uuid {
    font-family: monospace;
    font-size: 0.8rem;
    color: #4caf50;
}

.input-row {
    display: flex;
    gap: 5px;
}

.input-row input {
    flex: 1;
    background: #111;
    border: 1px solid #444;
    color: white;
    padding: 5px;
    border-radius: 4px;
}

.input-row button {
    margin-top: 0;
    width: auto;
    padding: 5px 10px;
}

.suggestion-text {
    margin-top: 15px;
    padding: 10px;
    background: rgba(61, 90, 254, 0.1);
    border-left: 3px solid var(--accent-color);
    font-weight: bold;
    color: #fff;
}

.small-text {
    margin-top: 5px;
    font-size: 0.75rem;
    color: #888;
    font-family: monospace;
}

#piece-picker {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.95);
    padding: 15px;
    border: 2px solid var(--accent-color);
    border-radius: 8px;
    z-index: 200;
    width: 160px;
}

.picker-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 10px;
}

.picker-piece {
    width: 40px;
    height: 40px;
    cursor: pointer;
    border: 1px solid #444;
    border-radius: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.white-piece-bg {
    background: #2c3e50; /* Dark blue-grey for white pieces */
}

.black-piece-bg {
    background: #ecf0f1; /* Very light grey for black pieces */
}

.picker-piece:hover {
    border-color: var(--accent-color);
    transform: scale(1.1);
}

.picker-piece img {
    width: 32px;
    height: 32px;
}

/* Switch styling */
.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 20px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 20px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent-color);
}

input:checked + .slider:before {
  transform: translateX(20px);
}