:root {
            --primary: #2c3e70; /* Azul oscuro */
            --secondary: #3498db; /* Azul claro */
            --success: #2ecc71; /* verde */
            --danger: #e74c3c; /* Rojo */
			border-radius: 15px;
        }

        body {
            font-family: system-ui, -apple-system, sans-serif;
            margin: 0;
            padding: 20px;
            background: linear-gradient(135deg, #000428, #004e92, #000428);
            color: white;
            position: relative;
            overflow-x: hidden;
			border-radius: 15px;
        }

        #starCanvas {
            position: fixed;
            top: 0;
            left: 0;
            z-index: -1;
            pointer-events: none;
        }
        
        .container {
            max-width: 800px;
            margin: 0 auto;
			border-radius: 15px;
        }

        .quiz-title {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
            margin: 20px 0;
            padding: 15px;
            background: linear-gradient(135deg, var(--secondary), #4ecdc4); /* Color degradado fondo titulo */
            border-radius: 15px;
            animation: titleGlow 2s infinite alternate;
        }

        .quiz-title h1 {
            margin: 0;
            font-size: 1.8em;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }

        .title-icon {
            width: 40px;
            height: 40px;
            filter: drop-shadow(0 0 2px rgba(255,255,255,0.5));
        }

        .score-board {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 20px;
            padding: 15px;
            background: var(--primary);
            border-radius: 10px;
			border: 1px solid #ccc;
        }

        .timer-container {
            position: fixed;
            top: 20px;
            right: 20px;
            display: flex;
            align-items: center;
            gap: 5px;
            color: #4ecdc4;
            z-index: 100;
        }

        .timer-icon {
            width: 20px;
            height: 20px;
        }

        .timer-text {
            font-weight: bold;
        }

        .time-warning {
            color: #e74c3c;
            animation: pulse 1s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }

        .score-subtitle {
            font-weight: bold;
            text-align: center;
            color: #4ecdc4;
            margin-bottom: 5px;
			font-size: 1.1em;
        }

        .score-note {
            text-align: center;
            color: #2ecc71;
            font-size: 1.1em;
            margin-bottom: 5px;
        }

        .score-counters {
            display: flex;
            justify-content: space-between;
        }

        .question-container {
            background: #2c2c2c;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 20px;
            position: relative;
            overflow: hidden;
        }

        .question {
            font-size: 1.2em;
            margin-bottom: 15px;
        }

        .option {
            padding: 10px;
            margin: 5px 0;
            background: var(--primary);
            border-radius: 5px;
            cursor: pointer;
            transition: transform 0.2s;
        }

        .option:hover {
            transform: translateX(10px);
        }

        .correct {
            animation: correctFlash 1s;
        }

        .incorrect {
            animation: incorrectShake 0.5s;
        }

        .converter-icon {
            position: fixed;
            bottom: 10px;
            right: 30px;
			top: 565px;
            cursor: pointer;
            padding: 5px;
            border-radius: 50%;
        }

        .converter-modal {
            display: none;
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: linear-gradient(135deg, var(--secondary), #4ecdc4); /* Color degradado fondo titulo */
            padding: 20px;
            border-radius: 10px;
            z-index: 1000;
			border: 1px solid #ccc;
        }

        .converter-controls {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin: 15px 0;
        }

        .converter-select {
            padding: 8px;
            border-radius: 5px;
            background: #34495e;
            color: white;
            border: 1px solid var(--secondary);
        }

        .result-display {
            background: #34495e;
            padding: 10px;
            border-radius: 5px;
            margin-top: 10px;
            text-align: center;
            font-size: 0.9em;
        }

        .converter-input {
            padding: 5px;
            width: 200px;
        }

        .selected {
            transform: translateX(10px);
            background: var(--secondary);
        }
        
        .correct-answer {
            background: var(--success) !important;
            animation: correctFlash 1s;
        }
        
        .incorrect-answer {
            background: var(--danger) !important;
            animation: incorrectShake 0.5s;
        }
        
        .nav-buttons {
            margin-top: 15px;
            display: flex;
            gap: 10px;
            justify-content: flex-end;
        }
        
        .nav-button {
            padding: 8px 20px;
            border-radius: 5px;
            cursor: pointer;
            background: var(--secondary);
            border: none;
            color: white;
        }

        .feedback-modal {
            display: none;
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: var(--danger);
            color: white;
            padding: 20px;
            border-radius: 10px;
			border: 1px solid #ccc;
			border-color: White;
            z-index: 1001;
            text-align: center;
            box-shadow: 0 0 15px rgba(0,0,0,0.3);
        }

        .feedback-close {
            position: absolute;
            top: 5px;
            right: 10px;
            cursor: pointer;
            font-weight: bold;
        }

        @keyframes correctFlash {
            0% { background: var(--success); }
            100% { background: var(--primary); }
        }

        @keyframes incorrectShake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(10px); }
            75% { transform: translateX(-10px); }
        }

        @keyframes titleGlow {
            from { box-shadow: 0 0 10px var(--secondary); }
            to { box-shadow: 0 0 20px var(--secondary); }
        }

        .results-screen {
            display: none;
            text-align: center;
            padding: 20px;
            background: var(--primary);
            border-radius: 10px;
        }

        .config-screen {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.8);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 1002;
        }

        .config-content {
            background: var(--primary);
            padding: 30px;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 0 20px rgba(0,0,0,0.5);
        }

        .config-content input {
            display: block;
            margin: 15px auto;
            padding: 10px;
            width: 120px;
            font-size: 16px;
            text-align: center;
            border: 2px solid var(--secondary);
            border-radius: 8px;
            background: #34495e;
            color: white;
        }

        .config-content button {
            background: var(--secondary);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 16px;
            transition: transform 0.2s;
        }

        .config-content button:hover {
            transform: scale(1.05);
        }
        
        .user-name {
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 5px 0;
            font-weight: bold;
            color: #4ecdc4;
        }
        
        .final-name {
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 15px 0;
            font-size: 1.2em;
        }
        
        .astronaut-icon {
            filter: drop-shadow(0 0 2px rgba(76,175,80,0.5));
        }

        .nav-buttons {
            margin-top: 15px;
            display: flex;
            gap: 10px;
            justify-content: flex-end;
        }