* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #3a6186 0%, #89253e 100%);
    min-height: 100vh;
    color: #222;
    overflow-x: hidden;
    padding: 20px;
}
.game-container {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255,255,255,0.97);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(58,97,134,0.2);
}
.game-header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 3px solid #3a6186;
    padding-bottom: 20px;
}
.game-header h1 {
    font-size: 3rem;
    color: #3a6186;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
    font-weight: bold;
}
.game-status {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}
.current-player {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: bold;
}
.player-label {
    color: #3a6186;
}
.player-name {
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1.1rem;
}
.player-name.white {
    background: linear-gradient(45deg, #fff, #eee);
    color: #3a6186;
    box-shadow: 0 2px 8px rgba(58,97,134,0.1);
}
.player-name.black {
    background: linear-gradient(45deg, #222, #444);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.game-controls {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}
.game-btn {
    padding: 12px 24px;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(45deg, #3a6186, #89253e);
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}
.game-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(58,97,134,0.2);
    background: linear-gradient(45deg, #89253e, #3a6186);
}
.game-btn:active {
    transform: translateY(0);
}
.game-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}
.game-board-container {
    display: grid;
    grid-template-columns: 160px 1fr 160px;
    gap: 30px;
    margin-bottom: 30px;
    align-items: start;
}
.captured-pieces {
    background: rgba(58,97,134,0.08);
    border-radius: 15px;
    padding: 20px;
    border: 2px solid rgba(58,97,134,0.12);
}
.captured-pieces h3 {
    color: #89253e;
    margin-bottom: 15px;
    text-align: center;
    font-size: 1.1rem;
}
.captured-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}
.captured-piece {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1rem;
    border: 2px solid;
    background: #fff;
}
.captured-piece.white {
    color: #3a6186;
    border-color: #3a6186;
}
.captured-piece.black {
    color: #222;
    border-color: #222;
}
.board-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}
#game-board {
    border: 4px solid #3a6186;
    border-radius: 10px;
    background: #f8f8f8;
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
    cursor: pointer;
    max-width: 100%;
    height: auto;
}
.board-coordinates {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
.files {
    position: absolute;
    top: -25px;
    left: 40px;
    right: 40px;
    display: flex;
    justify-content: space-between;
    font-weight: bold;
    color: #3a6186;
    font-size: 0.9rem;
}
.ranks {
    position: absolute;
    left: -25px;
    top: 40px;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    font-weight: bold;
    color: #89253e;
    font-size: 0.9rem;
}
.game-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}
.move-history, .piece-guide {
    background: rgba(58,97,134,0.08);
    border-radius: 15px;
    padding: 25px;
    border: 2px solid rgba(58,97,134,0.12);
}
.move-history h3, .piece-guide h3 {
    color: #89253e;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.2rem;
}
.moves-container {
    max-height: 300px;
    overflow-y: auto;
    background: rgba(255,255,255,0.7);
    border-radius: 8px;
    padding: 15px;
}
.move-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 12px;
    margin-bottom: 5px;
    background: rgba(255,255,255,0.5);
    border-radius: 6px;
    border-left: 4px solid;
    font-family: monospace;
    font-size: 0.9rem;
}
.move-item.white {
    border-left-color: #3a6186;
}
.move-item.black {
    border-left-color: #222;
}
.move-number {
    font-weight: bold;
    color: #89253e;
}
.pieces-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}
.piece-info {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 12px;
    align-items: center;
    padding: 10px;
    background: rgba(255,255,255,0.7);
    border-radius: 8px;
    border: 1px solid rgba(58,97,134,0.12);
}
.piece-symbol {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    border: 2px solid #3a6186;
    background: #fff;
}
.piece-name {
    font-weight: bold;
    color: #3a6186;
    font-size: 1rem;
}
.piece-desc {
    font-size: 0.85rem;
    color: #666;
    text-align: right;
}
.mobile-controls {
    text-align: center;
    margin-top: 20px;
    padding: 15px;
    background: rgba(58,97,134,0.08);
    border-radius: 10px;
}
.control-hint {
    color: #3a6186;
    font-style: italic;
}
.game-overlay, .rules-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}
.overlay-content, .rules-content {
    background: rgba(255,255,255,0.98);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    max-width: 500px;
    width: 90%;
    border: 3px solid #3a6186;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.rules-content {
    max-width: 700px;
    max-height: 80vh;
    overflow-y: auto;
    text-align: left;
}
.overlay-content h2, .rules-content h2 {
    color: #89253e;
    margin-bottom: 20px;
    font-size: 2rem;
    text-align: center;
}
.overlay-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #222;
}
.overlay-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}
.rules-sections {
    margin-bottom: 30px;
}
.rules-section {
    margin-bottom: 25px;
    padding: 20px;
    background: rgba(58,97,134,0.08);
    border-radius: 10px;
    border-left: 4px solid #89253e;
}
.rules-section h3 {
    color: #89253e;
    margin-bottom: 10px;
    font-size: 1.1rem;
}
.rules-section p, .rules-section li {
    color: #222;
    line-height: 1.6;
    margin-bottom: 8px;
}
.rules-section ul {
    margin-left: 20px;
}
.hidden {
    display: none !important;
}
@keyframes pieceMove {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}
@keyframes pieceCapture {
    0% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.2) rotate(5deg); }
    100% { transform: scale(0) rotate(360deg); }
}
@keyframes checkWarning {
    0%, 100% { background-color: transparent; }
    50% { background-color: rgba(255,0,0,0.2); }
}
.piece-selected {
    animation: pieceMove 0.3s ease-in-out;
}
.piece-captured {
    animation: pieceCapture 0.5s ease-in-out;
}
.check-warning {
    animation: checkWarning 1s ease-in-out infinite;
}
@media (max-width: 1024px) {
    .game-board-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .captured-pieces {
        order: 3;
    }
    .board-wrapper {
        order: 1;
    }
    .game-info {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    .game-container {
        padding: 20px;
    }
    .game-header h1 {
        font-size: 2.2rem;
    }
    .game-status {
        justify-content: center;
        text-align: center;
    }
    .game-controls {
        justify-content: center;
    }
    .game-btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
    #game-board {
        width: 100%;
        max-width: 350px;
    }
    .piece-info {
        grid-template-columns: auto 1fr;
        gap: 8px;
    }
    .piece-desc {
        grid-column: 1 / -1;
        text-align: left;
        margin-top: 5px;
        font-size: 0.8rem;
    }
    .overlay-content, .rules-content {
        padding: 25px;
        margin: 20px;
    }
    .files, .ranks {
        font-size: 0.8rem;
    }
}
@media (max-width: 480px) {
    .game-header h1 {
        font-size: 1.8rem;
    }
    .current-player {
        flex-direction: column;
        gap: 5px;
    }
    .game-controls {
        flex-direction: column;
        width: 100%;
    }
    .game-btn {
        width: 100%;
    }
    .pieces-grid {
        gap: 8px;
    }
    .piece-symbol {
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }
    .captured-piece {
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }
}
.moves-container::-webkit-scrollbar {
    width: 8px;
}
.moves-container::-webkit-scrollbar-track {
    background: rgba(58,97,134,0.08);
    border-radius: 4px;
}
.moves-container::-webkit-scrollbar-thumb {
    background: rgba(58,97,134,0.2);
    border-radius: 4px;
}
.moves-container::-webkit-scrollbar-thumb:hover {
    background: rgba(58,97,134,0.4);
}
@media (hover: none) and (pointer: coarse) {
    .game-btn:hover {
        transform: none;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    }
    .piece-info:hover {
        background: rgba(255,255,255,0.7);
    }
}