:root {
    --font-family: 'Poppins', sans-serif;
    --primary-color: #4A90E2;
    --secondary-color: #50E3C2;
    --accent-color: #F5A623;
    --text-color: #333;
    --bg-color: #f7f9fc;
    --card-bg-color: #ffffff;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --success-color: #4CAF50;

    --border-radius: 12px;
    --card-padding: 30px;
    --transition-speed: 0.3s;
}

body {
    font-family: var(--font-family);
    margin: 0;
    padding: 2rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    text-align: center;
    display: flex;
    justify-content: center;
}

.app-container {
    width: 100%;
    max-width: 900px;
}

.app-header {
    margin-bottom: 2rem;
}

.app-header h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.app-header p {
    font-size: 1.2rem;
    color: #777;
}

.game-nav {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    padding: 10px;
    box-shadow: 0 4px 15px var(--shadow-color);
}

.nav-button {
    font-family: var(--font-family);
    font-size: 1rem;
    padding: 0.8rem 1.5rem;
    border: none;
    background-color: transparent;
    color: var(--text-color);
    cursor: pointer;
    border-radius: 8px;
    transition: all var(--transition-speed) ease;
    font-weight: 600;
}

.nav-button.active, .nav-button:hover {
    background-color: var(--primary-color);
    color: white;
}

.game-card {
    display: none;
    background-color: var(--card-bg-color);
    padding: var(--card-padding);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px var(--shadow-color);
}

.game-card.active {
    display: block;
}

.game-title {
    font-size: 2rem;
    margin-top: 0;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.game-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.control-group, .button-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.control-group label {
    font-weight: 600;
    font-size: 1.1rem;
}

.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 10px;
    width: 100%;
}

.input-grid input {
    width: 100%;
    box-sizing: border-box;
}

input[type="text"] {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
}

.btn, .btn-small {
    font-family: var(--font-family);
    cursor: pointer;
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
    background-color: var(--secondary-color);
    color: white;
}

.btn:hover, .btn-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(80, 227, 194, 0.4);
}

.btn-primary {
    background-color: var(--primary-color);
}

.btn-primary:hover {
     box-shadow: 0 4px 10px rgba(74, 144, 226, 0.4);
}

.btn-small {
    padding: 8px 12px;
    font-size: 0.9rem;
}

#player-count-display {
    font-size: 1.2rem;
    font-weight: 600;
    min-width: 30px;
}

canvas {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    width: 100%;
    height: auto;
}