/* Import Google Font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

/* --- Keyframes for Background Animation --- */
@keyframes animated-gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* --- General Body and Font Styles --- */
body {
    font-family: 'Poppins', sans-serif;
    color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
    background: linear-gradient(135deg, #1d2b64, #c45677, #1d2b64, #4fa3a5);
    background-size: 400% 400%;
    animation: animated-gradient 15s ease infinite;
}

/* --- Main App Container --- */
#app-container {
    background: rgba(20, 20, 40, 0.6);
    padding: 30px 40px;
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    width: 100%;
    max-width: 800px;
    text-align: center;
}

header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding-bottom: 20px;
    margin-bottom: 30px;
}

h1 {
    color: #ffffff;
    margin: 0;
    font-weight: 700;
    font-size: 2.5em;
    text-shadow: 0 0 10px rgba(135, 220, 220, 0.5);
}

h2, h3 {
    color: #e0e0e0;
    font-weight: 600;
    margin-bottom: 25px;
}

h3 {
    color: #00ffff; /* Cyan accent for game titles */
}

#player-info {
    margin-top: 15px;
    font-size: 1.1em;
    color: #cccccc;
}

#player-name-display {
    font-weight: bold;
    margin-right: 20px;
    color: #fff;
}

/* --- Screen Management --- */
.screen { display: none; }
.screen.active { display: block; }
#game-area { display: none; }

/* --- Buttons --- */
button {
    background: linear-gradient(145deg, rgba(0, 255, 255, 0.2), rgba(255, 0, 255, 0.2));
    color: #f0f0f0;
    border: 1px solid rgba(0, 255, 255, 0.5);
    padding: 12px 25px;
    border-radius: 50px; /* Pill-shaped buttons */
    cursor: pointer;
    font-size: 1em;
    font-weight: 400;
    transition: all 0.3s ease;
    margin: 8px;
    box-shadow: 0 0 5px rgba(0, 255, 255, 0.2), inset 0 0 5px rgba(0, 255, 255, 0.1);
}

button:hover {
    background: linear-gradient(145deg, rgba(0, 255, 255, 0.4), rgba(255, 0, 255, 0.4));
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.6), inset 0 0 8px rgba(0, 255, 255, 0.2);
    transform: translateY(-3px) scale(1.05);
    color: #fff;
}

button:disabled {
    background: rgba(100, 100, 100, 0.3);
    border-color: rgba(100, 100, 100, 0.5);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* --- Secondary Button Style --- */
.secondary-btn {
    background: transparent;
    border: 1px solid rgba(255, 0, 255, 0.6);
}

.secondary-btn:hover {
    background: rgba(255, 0, 255, 0.2);
    border-color: #ff00ff;
}

#back-to-menu {
    margin-bottom: 25px;
    display: none;
}

/* --- Input Fields --- */
input[type="text"], input[type="number"] {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(0, 255, 255, 0.4);
    border-radius: 8px;
    padding: 12px;
    font-size: 1em;
    color: #f0f0f0;
    width: 60%;
    max-width: 300px;
    transition: all 0.3s ease;
}

input[type="text"]:focus, input[type="number"]:focus {
    outline: none;
    border-color: #00ffff;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

#player-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 25px 0;
    max-height: 40vh;
    overflow-y: auto;
    padding-right: 10px; /* For scrollbar spacing */
}

.player-profile-btn {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 15px 20px;
    border-radius: 10px;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.player-profile-btn:hover {
    background: rgba(0, 255, 255, 0.15);
    border-color: #00ffff;
    transform: scale(1.02);
}

.player-profile-btn .player-name {
    font-size: 1.2em;
    font-weight: 600;
}

.player-profile-btn .player-score {
    font-size: 1em;
    color: #ccc;
}

#create-player-screen .secondary-btn {
    margin-top: 10px;
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

#main-menu #switch-player-btn {
    margin-top: 25px;
}

.game-screen {
    padding: 20px;
    border-radius: 15px;
    background-color: rgba(0, 0, 10, 0.3);
}

.result-box {
    margin-top: 20px;
    padding: 15px;
    border-radius: 10px;
    background-color: rgba(0, 0, 0, 0.4);
    min-height: 24px;
    font-weight: bold;
    font-size: 1.1em;
    color: #00ffff;
}

.hint {
    font-style: italic;
    color: #aaa;
}

/* General sub-display for scores/status within games */
.game-sub-display {
    font-size: 1.2em;
    font-weight: 600;
    color: #00ffff;
    margin-bottom: 15px;
}

.play-again-btn {
    display: none;
    margin-top: 20px;
}

/* --- Checkers Styles --- */
#checkers-board {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    width: 400px;
    height: 400px;
    margin: 0 auto;
    border: 3px solid rgba(0, 255, 255, 0.5);
    border-radius: 5px;
}

.checkers-square {
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.checkers-square.light {
    background-color: #c2c2c2;
}

.checkers-square.dark {
    background-color: #503030;
    cursor: pointer;
}

.checker-piece {
    width: 80%;
    height: 80%;
    border-radius: 50%;
    box-shadow: inset 0 -3px 5px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.4);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.checker-piece.p1 {
    background-color: #ff4d4d; /* Red */
}

.checker-piece.p2 {
    background-color: #f0f0f0; /* White */
}

.checker-piece.king::after {
    content: '👑';
    font-size: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-shadow: 0 0 3px black;
}

.checker-piece.selected {
    transform: scale(1.1);
    box-shadow: 0 0 15px #00ffff;
}

.valid-move {
    background-color: rgba(0, 255, 255, 0.4) !important;
}

/* --- Tic-Tac-Toe Styles --- */
#tictactoe-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 240px;
    height: 240px;
    margin: 20px auto;
    gap: 5px;
}

.tictactoe-cell {
    width: 80px;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3em;
    font-weight: bold;
    cursor: pointer;
    background-color: rgba(0, 255, 255, 0.05);
    border-radius: 10px;
    transition: background-color 0.3s;
}
.tictactoe-cell:hover { background-color: rgba(0, 255, 255, 0.15); }
.tictactoe-cell:nth-child(odd) { color: #00ffff; }
.tictactoe-cell:nth-child(even) { color: #ff00ff; }

/* --- Hangman Styles --- */
#hangman-word {
    font-size: 2em;
    letter-spacing: 0.5em;
    margin: 20px 0;
    color: #fff;
    font-weight: 600;
}
#hangman-drawing {
    font-family: 'Courier New', Courier, monospace;
    white-space: pre;
    font-size: 1.1em;
    line-height: 1.2;
    margin: 10px auto;
    padding: 15px;
    background: rgba(0,0,0,0.2);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 10px;
    width: fit-content;
    color: #ff4d4d;
}

/* --- Memory Match Styles --- */
#memory-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    max-width: 400px;
    margin: 20px auto;
    perspective: 1000px;
}
.memory-card {
    width: 80px;
    height: 80px;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
}
.memory-card .card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5em;
    font-weight: bold;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}
.card-front {
    background: rgba(255, 255, 255, 0.9);
    color: #1d2b64;
    transform: rotateY(180deg);
}
.card-back {
    background: linear-gradient(135deg, #00ffff, #ff00ff);
}
.memory-card.is-flipped { transform: rotateY(180deg); }
.memory-card.is-matched {
    transform: rotateY(180deg);
    cursor: default;
    opacity: 0.7;
}
.memory-card.is-matched .card-front {
    background: #00ff7f;
    box-shadow: 0 0 20px #00ff7f;
}

/* --- Minesweeper Styles --- */
.minesweeper-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0,0,0,0.2);
    padding: 10px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 1.2em;
    font-weight: 600;
}

#mines-left {
    color: #ff00ff;
}

#game-status {
    color: #00ffff;
}

#minesweeper-board {
    display: grid;
    background-color: rgba(0, 0, 10, 0.3);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 10px;
    padding: 10px;
    gap: 4px;
    margin: 0 auto;
    width: fit-content;
}

.mine-cell {
    width: 35px;
    height: 35px;
    background-color: rgba(0, 255, 255, 0.1);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 5px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

.mine-cell:hover {
    background-color: rgba(0, 255, 255, 0.25);
}

.mine-cell.revealed {
    background-color: rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.1);
    cursor: default;
}

.mine-cell.flagged {
    font-size: 1.5em;
}

.mine-cell.mine-hit {
    background-color: #ff4d4d;
    border-color: red;
    box-shadow: 0 0 15px red;
    font-size: 1.5em;
}

.mine-cell.c1 { color: #00ffff; }
.mine-cell.c2 { color: #90ee90; }
.mine-cell.c3 { color: #ffadad; }
.mine-cell.c4 { color: #87cefa; }
.mine-cell.c5 { color: #ff00ff; }
.mine-cell.c6 { color: #ffd700; }
.mine-cell.c7 { color: #ffffff; }
.mine-cell.c8 { color: #a9a9a9; }

#snake-canvas, #brickbreaker-canvas {
    background-color: rgba(0, 0, 10, 0.5);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 10px;
    margin: 0 auto;
    display: block;
}

/* --- Connect Four Styles --- */
#connectfour-board {
    margin: 20px auto;
    background-color: rgba(0, 0, 50, 0.5);
    border-radius: 10px;
    padding: 10px;
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
    width: fit-content;
}

.connectfour-slot {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: background-color 0.2s;
}

.connectfour-slot.player1 { background-color: #ff00ff; box-shadow: 0 0 10px #ff00ff; }
.connectfour-slot.player2 { background-color: #ffd700; box-shadow: 0 0 10px #ffd700; }
.connectfour-column:hover .connectfour-slot:not(.player1):not(.player2) {
    background-color: rgba(255,255,255,0.1);
}

/* --- Sudoku Styles --- */
#sudoku-board {
    margin: 20px auto;
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    width: fit-content;
    border: 3px solid #00ffff;
    border-radius: 5px;
    gap: 1px;
    background-color: rgba(0, 255, 255, 0.5);
}

.sudoku-cell {
    width: 40px;
    height: 40px;
    background-color: rgba(0, 0, 10, 0.7);
    color: #fff;
    font-size: 1.5em;
    text-align: center;
    border: none;
}

.sudoku-cell:focus {
    outline: 2px solid #ff00ff;
}

.sudoku-cell:nth-child(3n) { border-right: 2px solid rgba(0, 255, 255, 0.5); }
.sudoku-cell:nth-child(9n) { border-right: none; }
#sudoku-board tr:nth-child(3n) .sudoku-cell { border-bottom: 2px solid rgba(0, 255, 255, 0.5); }
#sudoku-board tr:last-child .sudoku-cell { border-bottom: none; }

.sudoku-cell.given {
    color: #00ffff;
    font-weight: bold;
}
.sudoku-controls { margin-top: 15px; }

/* Blackjack */
.blackjack-area {
    background: rgba(0,0,0,0.2);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 20px;
}
.hand-area {
    display: flex;
    justify-content: center;
    gap: 10px;
    min-height: 120px;
    align-items: center;
}
.card {
    width: 80px;
    height: 110px;
    background-color: white;
    border-radius: 8px;
    color: black;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 5px;
    font-size: 1.5em;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}
.card.red { color: #D22B2B; }
.card .suit { font-size: 0.8em; }
.card .rank { align-self: flex-end; }

.blackjack-controls { display: flex; justify-content: center; gap: 10px; }


/* Responsive Adjustments */
@media (max-width: 600px) {
    body { padding: 10px; }
    #app-container { padding: 20px; }
    h1 { font-size: 2em; }
    #memory-board { max-width: 300px; gap: 5px; }
    .memory-card { width: 65px; height: 65px; }
    .mine-cell {
        width: 30px;
        height: 30px;
        font-size: 1em;
    }
    #checkers-board { width: 320px; height: 320px; }
    .checkers-square { width: 40px; height: 40px; }
    .checker-piece.king::after { font-size: 18px; }
    .connectfour-slot { width: 40px; height: 40px; }
    .sudoku-cell { width: 32px; height: 32px; font-size: 1.2em;}
    .card { width: 60px; height: 85px; font-size: 1.2em;}
}