/* Main menu styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
}

.container {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

h1 {
    margin-top: 0;
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    text-align: center;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    margin-top: 2rem;
    align-items: center;
}

.menu-btn {
    background: linear-gradient(45deg, #ff6b6b, #ee5a24);
    border: none;
    border-radius: 50px;
    color: white;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    width: 250px;
    margin: 0 auto;
}

.menu-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #ee5a24, #ff6b6b);
}

.menu-btn:active {
    transform: translateY(1px);
}

/* Mobile responsiveness */
@media screen and (max-width: 768px) {
    .menu-buttons {
        gap: 2rem;
        align-items: center;
    }
    
    .menu-btn {
        width: 100%;
        max-width: 250px;
        margin: 0 auto 1rem auto;
        font-size: 1.1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
}

.github-button-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

.github-btn {
    background: linear-gradient(45deg, #4ecdc4, #45b7d1);
    border: none;
    border-radius: 50px;
    color: white;
    padding: 10px 20px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    outline: none;
    margin-top: 10px;
}

.github-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #45b7d1, #4ecdc4);
}

/* Responsive styles */
@media (max-width: 768px) {
    .menu {
        gap: 2rem;
    }
    
    .menu-btn {
        width: 100%;
        max-width: 250px;
        margin: 0 auto 1rem auto; /* Ensure buttons are centered on mobile */
    }
    
    h1 {
        font-size: 2rem;
    }
}

/* Game styles */
.game-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

.board-size-selector {
    margin: 20px 0;
}

.board-size-selector label {
    display: block;
    margin-bottom: 10px;
    font-size: 1.1rem;
    font-weight: bold;
}

.board-size-selector select {
    background: linear-gradient(45deg, #4ecdc4, #45b7d1);
    border: none;
    border-radius: 50px;
    color: white;
    padding: 10px 15px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 200px;
    outline: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    font-weight: bold;
    appearance: none;
    -webkit-appearance: none;
}

.board-size-selector select:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #45b7d1, #4ecdc4);
}

/* Ensure dropdown options have good contrast */
.board-size-selector select option {
    background: #45b7d1;
    color: white;
    font-weight: bold;
}

.status {
    font-size: 1.5rem;
    margin: 20px 0;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    backdrop-filter: blur(5px);
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 5px;
    max-width: 500px;
    margin: 20px auto;
    justify-content: center;
}

.board-wrapper {
    display: flex;
    justify-content: center;
    width: 100%;
}

.cell {
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Adjust for larger boards */
.board[data-size="4"] .cell {
    font-size: 2.5rem;
    width: 80px;
    height: 80px;
}

.board[data-size="5"] .cell {
    font-size: 2rem;
    width: 60px;
    height: 60px;
}

.board[data-size="6"] .cell {
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
}

.cell:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.cell.taken {
    cursor: default;
}

.cell.x {
    color: #ff6b6b;
}

.cell.o {
    color: #4ecdc4;
}

#resetBtn {
    background: linear-gradient(45deg, #4ecdc4, #45b7d1);
    border: none;
    border-radius: 50px;
    color: white;
    padding: 12px 24px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    margin: 20px 0;
    outline: none;
}

#resetBtn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #45b7d1, #4ecdc4);
}

#resetBtn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #45b7d1, #4ecdc4);
}

.difficulty-controls {
    margin-top: 20px;
}

.difficulty-btn {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    color: #333;
    padding: 8px 16px;
    margin: 0 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

.difficulty-btn:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-2px);
}

.difficulty-btn.active {
    background: linear-gradient(45deg, #ff6b6b, #ee5a24);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .menu-btn {
        width: 200px;
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
    
    .cell {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }
    
    .game-container {
        padding: 10px;
    }
}

/* Back button styles */
.back-btn {
    background: linear-gradient(45deg, #4ecdc4, #45b7d1);
    border: none;
    border-radius: 50px;
    color: white;
    padding: 12px 24px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    margin-top: 20px;
    width: 200px;
    margin: 20px auto 0;
    outline: none;
}

.back-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #45b7d1, #4ecdc4);
}

.back-btn:active {
    transform: translateY(1px);
}

/* Multiplayer-specific styles */
.multiplayer-controls {
    margin: 20px 0;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.connection-status {
    text-align: center;
    margin-bottom: 15px;
    font-size: 1.1rem;
    font-weight: bold;
}

.room-code-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    align-items: center;
}

.room-code-container label {
    font-size: 1rem;
    font-weight: bold;
}

.room-code-container input {
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    padding: 10px 15px;
    font-size: 1.2rem;
    font-weight: bold;
    text-align: center;
    width: 150px;
    outline: none;
    transition: all 0.3s ease;
}

.room-code-container input:focus {
    border-color: #4ecdc4;
    box-shadow: 0 0 10px rgba(78, 205, 196, 0.5);
}

.room-code-container button {
    background: linear-gradient(45deg, #ff6b6b, #ee5a24);
    border: none;
    border-radius: 50px;
    color: white;
    padding: 10px 20px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.room-code-container button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #ee5a24, #ff6b6b);
}

.room-code-container button:active {
    transform: translateY(1px);
}

.room-code-container button:disabled {
    background: rgba(255, 255, 255, 0.3);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Responsive design for multiplayer */
@media (max-width: 768px) {
    .room-code-container {
        flex-direction: column;
    }
    
    .room-code-container input {
        width: 100%;
        max-width: 250px;
    }
    
    .room-code-container button {
        width: 100%;
        max-width: 250px;
    }
    
    .connection-status {
        font-size: 1rem;
    }
}