/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #ffffff;
    color: #333333;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    max-width: 1000px;
    width: 100%;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
}

.game-title {
    font-size: 36px;
    color: #2c3e50;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

/* Game Controls */
.game-controls {
    background-color: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.stats-container {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.stat-label {
    font-size: 22px;
    font-weight: bold;
    color: #555555;
}

.stat-value {
    font-size: 28px;
    font-weight: bold;
    color: #27ae60;
    min-width: 80px;
    text-align: left;
}

.controls-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}

.grid-selector {
    display: flex;
    align-items: center;
    gap: 15px;
}

.grid-label {
    font-size: 20px;
    font-weight: bold;
    color: #555555;
}

.grid-select {
    font-size: 20px;
    padding: 12px 20px;
    border: 3px solid #3498db;
    border-radius: 10px;
    background-color: #ffffff;
    cursor: pointer;
    min-height: 50px;
    min-width: 150px;
    font-weight: bold;
}

.grid-select:hover {
    background-color: #e3f2fd;
}

.grid-select:focus {
    outline: 3px solid #2980b9;
    outline-offset: 2px;
}

.new-game-btn {
    font-size: 22px;
    padding: 15px 35px;
    background-color: #3498db;
    color: #ffffff;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: bold;
    min-height: 50px;
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
    transition: all 0.3s ease;
}

.new-game-btn:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(52, 152, 219, 0.4);
}

.new-game-btn:active {
    transform: translateY(0);
}

/* Game Board */
.game-board {
    display: grid;
    gap: 15px;
    justify-content: center;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.game-board.grid-12 {
    grid-template-columns: repeat(4, 130px);
}

.game-board.grid-16 {
    grid-template-columns: repeat(4, 130px);
}

.game-board.grid-20 {
    grid-template-columns: repeat(5, 130px);
}

/* Card Styles */
.card {
    width: 130px;
    height: 130px;
    background-color: #3498db;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 60px;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    min-width: 44px;
    min-height: 44px;
}

.card:hover:not(.flipped):not(.matched) {
    transform: scale(1.05);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.card.flipped,
.card.matched {
    background-color: #ffffff;
    border: 4px solid #27ae60;
    transform: rotateY(0deg);
}

.card.matched {
    background-color: #d4edda;
    border-color: #28a745;
    cursor: default;
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 12px;
}

.card-front {
    background-color: #3498db;
    color: #ffffff;
    font-size: 40px;
    font-weight: bold;
}

.card-back {
    transform: rotateY(180deg);
}

.card.flipped .card-front {
    transform: rotateY(180deg);
}

.card.flipped .card-back {
    transform: rotateY(360deg);
}

.card-icon {
    font-size: 60px;
    user-select: none;
}

/* Victory Screen */
.victory-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.5s ease;
}

.victory-screen.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.victory-content {
    background-color: #ffffff;
    padding: 50px;
    border-radius: 20px;
    text-align: center;
    max-width: 600px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.victory-title {
    font-size: 42px;
    color: #27ae60;
    margin-bottom: 20px;
    font-weight: bold;
}

.victory-message {
    font-size: 26px;
    color: #555555;
    margin-bottom: 30px;
    font-weight: 500;
}

.victory-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.victory-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.victory-stat-label {
    font-size: 22px;
    color: #555555;
    font-weight: bold;
}

.victory-stat-value {
    font-size: 32px;
    color: #27ae60;
    font-weight: bold;
}

.adsense-placeholder {
    background-color: #f0f0f0;
    border: 3px dashed #cccccc;
    padding: 40px 20px;
    margin: 30px 0;
    border-radius: 10px;
}

.adsense-text {
    font-size: 20px;
    color: #999999;
    font-weight: bold;
}

.play-again-btn {
    font-size: 24px;
    padding: 18px 40px;
    background-color: #27ae60;
    color: #ffffff;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: bold;
    min-height: 50px;
    box-shadow: 0 4px 8px rgba(39, 174, 96, 0.3);
    transition: all 0.3s ease;
}

.play-again-btn:hover {
    background-color: #229954;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(39, 174, 96, 0.4);
}

.play-again-btn:active {
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .game-title {
        font-size: 28px;
    }

    .stat-label {
        font-size: 18px;
    }

    .stat-value {
        font-size: 22px;
    }

    .grid-label {
        font-size: 18px;
    }

    .grid-select {
        font-size: 18px;
        padding: 10px 15px;
        min-width: 130px;
    }

    .new-game-btn {
        font-size: 18px;
        padding: 12px 25px;
    }

    .game-board.grid-12,
    .game-board.grid-16 {
        grid-template-columns: repeat(3, 120px);
        gap: 12px;
    }

    .game-board.grid-20 {
        grid-template-columns: repeat(4, 120px);
        gap: 12px;
    }

    .card {
        width: 120px;
        height: 120px;
        font-size: 55px;
    }

    .card-icon {
        font-size: 55px;
    }

    .victory-title {
        font-size: 32px;
    }

    .victory-message {
        font-size: 22px;
    }

    .victory-stat-label {
        font-size: 18px;
    }

    .victory-stat-value {
        font-size: 26px;
    }

    .play-again-btn {
        font-size: 20px;
        padding: 15px 30px;
    }

    .victory-content {
        padding: 30px;
        margin: 20px;
    }
}

@media (max-width: 480px) {
    .game-title {
        font-size: 24px;
    }

    .stats-container {
        gap: 30px;
    }

    .stat-label {
        font-size: 18px;
    }

    .stat-value {
        font-size: 20px;
    }

    .controls-row {
        gap: 15px;
    }

    .game-board.grid-12,
    .game-board.grid-16 {
        grid-template-columns: repeat(2, 120px);
        gap: 10px;
    }
    
    .game-board.grid-20 {
        grid-template-columns: repeat(3, 120px);
        gap: 10px;
    }

    .card {
        width: 120px;
        height: 120px;
        font-size: 50px;
    }

    .card-icon {
        font-size: 50px;
    }

    .victory-title {
        font-size: 28px;
    }

    .victory-message {
        font-size: 18px;
    }

    .victory-content {
        padding: 25px;
    }
}