/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #121213;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 500px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

/* Header */
header h1 {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: 0.2em;
    border-bottom: 1px solid #3a3a3c;
    padding-bottom: 15px;
    margin-bottom: 10px;
    width: 100%;
    text-align: center;
}

/* Message display */
.message {
    min-height: 30px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    padding: 8px 16px;
    border-radius: 4px;
    transition: opacity 0.3s ease;
}

.message.success {
    color: #538d4e;
    background-color: rgba(83, 141, 78, 0.1);
}

.message.error {
    color: #ff6b6b;
    background-color: rgba(255, 107, 107, 0.1);
}

.message.game-over {
    color: #818384;
    background-color: rgba(129, 131, 132, 0.1);
}

/* Game board */
.board {
    display: grid;
    grid-template-rows: repeat(6, 1fr);
    gap: 5px;
    margin: 20px 0;
}

.row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 5px;
}

.tile {
    width: 62px;
    height: 62px;
    border: 2px solid #3a3a3c;
    background-color: transparent;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 32px;
    font-weight: bold;
    text-transform: uppercase;
    transition: border-color 0.1s ease;
}

.tile.filled {
    border-color: #565758;
}

/* Tile color states */
.tile.correct {
    background-color: #538d4e;
    border-color: #538d4e;
    color: #fff;
}

.tile.present {
    background-color: #b59f3b;
    border-color: #b59f3b;
    color: #fff;
}

.tile.absent {
    background-color: #3a3a3c;
    border-color: #3a3a3c;
    color: #fff;
}

/* Animations */
@keyframes pop {
    0%, 100% { 
        transform: scale(1); 
    }
    50% { 
        transform: scale(1.1); 
    }
}

.tile.pop {
    animation: pop 0.15s ease-in-out;
}

@keyframes flip {
    0% { 
        transform: rotateX(0); 
    }
    50% { 
        transform: rotateX(90deg); 
    }
    100% { 
        transform: rotateX(0); 
    }
}

.tile.flip {
    animation: flip 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { 
        transform: translateX(0); 
    }
    10%, 30%, 50%, 70%, 90% { 
        transform: translateX(-5px); 
    }
    20%, 40%, 60%, 80% { 
        transform: translateX(5px); 
    }
}

.row.shake {
    animation: shake 0.4s ease-in-out;
}

/* Keyboard */
.keyboard {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 6px;
}

.key {
    min-width: 43px;
    height: 58px;
    background-color: #818384;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.1s ease, transform 0.05s ease;
    -webkit-user-select: none;
    user-select: none;
}

.key:hover {
    opacity: 0.9;
}

.key:active {
    transform: scale(0.95);
}

.key.wide {
    min-width: 65px;
    font-size: 12px;
}

/* Keyboard key states */
.key.correct {
    background-color: #538d4e;
}

.key.present {
    background-color: #b59f3b;
}

.key.absent {
    background-color: #3a3a3c;
}

/* Restart button */
.restart-btn {
    margin-top: 20px;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 600;
    background-color: #538d4e;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.05s ease;
}

.restart-btn:hover {
    background-color: #6aad60;
}

.restart-btn:active {
    transform: scale(0.95);
}

/* Responsive design for tablets */
@media (max-width: 768px) {
    .tile {
        width: 56px;
        height: 56px;
        font-size: 28px;
    }

    .key {
        min-width: 38px;
        height: 52px;
        font-size: 12px;
    }

    .key.wide {
        min-width: 58px;
    }

    header h1 {
        font-size: 30px;
    }
}

/* Responsive design for mobile */
@media (max-width: 480px) {
    .tile {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }

    .key {
        min-width: 32px;
        height: 48px;
        font-size: 11px;
    }

    .key.wide {
        min-width: 50px;
    }

    header h1 {
        font-size: 26px;
    }

    .keyboard {
        gap: 4px;
    }

    .keyboard-row {
        gap: 4px;
    }
}

@media (max-width: 380px) {
    .tile {
        width: 44px;
        height: 44px;
        font-size: 20px;
    }

    .key {
        min-width: 28px;
        height: 44px;
        font-size: 10px;
    }

    .key.wide {
        min-width: 45px;
    }
}