/* Reset y Variables CSS */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --color-primary: #2d5016;
            --color-secondary: #5a7c3e;
            --color-accent: #ff6b35;
            --color-warning: #f77f00;
            --color-success: #06a77d;
            --color-danger: #d62828;
            --color-earth: #8b4513;
            --color-bg: #f8f5f0;
            --color-card: #ffffff;
            --color-text: #2c2c2c;
            --color-text-light: #666;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: var(--color-text);
            background: linear-gradient(135deg, var(--color-bg) 0%, #e8e4db 100%);
            min-height: 100vh;
        }

        /* Header */
        header {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
            color: white;
            padding: 2rem 1rem;
            text-align: center;
            box-shadow: var(--shadow-lg);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        header h1 {
            font-size: clamp(1.5rem, 5vw, 2.5rem);
            margin-bottom: 0.5rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        header p {
            font-size: clamp(0.9rem, 2vw, 1.1rem);
            opacity: 0.95;
        }

        /* Navegación */
        nav {
            background: var(--color-secondary);
            padding: 1rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.5rem;
            box-shadow: var(--shadow);
        }

        nav button {
            background: var(--color-card);
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }

        nav button:hover, nav button:focus {
            background: var(--color-primary);
            color: white;
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        /* Container Principal */
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1rem;
        }

        /* Cards */
        .card {
            background: var(--color-card);
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .card h2 {
            color: var(--color-primary);
            margin-bottom: 1rem;
            font-size: clamp(1.3rem, 3vw, 1.8rem);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .card h3 {
            color: var(--color-secondary);
            margin: 1.5rem 0 1rem;
            font-size: clamp(1.1rem, 2.5vw, 1.4rem);
        }

        /* Sección oculta por defecto */
        .section {
            display: none;
        }

        .section.active {
            display: block;
        }

        /* Técnicas de Supervivencia */
        .technique-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
        }

        .technique-item {
            background: linear-gradient(135deg, var(--color-bg) 0%, #e8e4db 100%);
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 4px solid var(--color-accent);
        }

        .technique-item h4 {
            color: var(--color-primary);
            margin-bottom: 0.75rem;
            font-size: 1.2rem;
        }

        /* Calculador de Recursos */
        .calculator-form {
            background: var(--color-bg);
            padding: 1.5rem;
            border-radius: 10px;
            margin-top: 1rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: var(--color-primary);
            font-weight: 600;
        }

        .form-group input {
            width: 100%;
            padding: 0.75rem;
            border: 2px solid var(--color-secondary);
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus {
            outline: none;
            border-color: var(--color-accent);
        }

        /* Botones */
        .btn {
            background: var(--color-accent);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: all 0.3s ease;
            display: inline-block;
            text-align: center;
        }

        .btn:hover, .btn:focus {
            background: var(--color-warning);
            transform: scale(1.05);
            box-shadow: var(--shadow);
        }

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

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

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

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

        /* Resultados */
        .results {
            background: var(--color-bg);
            padding: 1.5rem;
            border-radius: 10px;
            margin-top: 1.5rem;
            border-left: 4px solid var(--color-success);
        }

        .results h4 {
            color: var(--color-primary);
            margin-bottom: 1rem;
        }

        .result-item {
            display: flex;
            justify-content: space-between;
            padding: 0.75rem;
            background: white;
            margin-bottom: 0.5rem;
            border-radius: 6px;
        }

        .result-item strong {
            color: var(--color-secondary);
        }

        /* Mapa */
        #map {
            height: 450px;
            border-radius: 10px;
            margin-top: 1rem;
            box-shadow: var(--shadow);
        }

        /* Clima */
        .weather-info {
            background: linear-gradient(135deg, #87CEEB 0%, #4682B4 100%);
            color: white;
            padding: 1.5rem;
            border-radius: 10px;
            margin-top: 1rem;
            text-align: center;
        }

        .weather-temp {
            font-size: 3rem;
            font-weight: bold;
        }

        /* Quiz */
        .quiz-question {
            background: var(--color-bg);
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 1.5rem;
        }

        .quiz-options {
            display: grid;
            gap: 0.75rem;
            margin-top: 1rem;
        }

        .quiz-option {
            background: white;
            padding: 1rem;
            border: 2px solid var(--color-secondary);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .quiz-option:hover {
            background: var(--color-bg);
            border-color: var(--color-accent);
            transform: translateX(5px);
        }

        .quiz-option.correct {
            background: var(--color-success);
            color: white;
            border-color: var(--color-success);
        }

        .quiz-option.incorrect {
            background: var(--color-danger);
            color: white;
            border-color: var(--color-danger);
        }

        .quiz-explanation {
            background: #e3f2fd;
            padding: 1rem;
            border-radius: 8px;
            margin-top: 1rem;
            border-left: 4px solid #2196F3;
        }

        .quiz-score {
            background: var(--color-accent);
            color: white;
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            font-size: 1.5rem;
            font-weight: bold;
        }

        /* Checklist */
        .checklist-category {
            margin-bottom: 2rem;
        }

        .checklist-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1rem;
            background: white;
            margin-bottom: 0.5rem;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .checklist-item:hover {
            background: var(--color-bg);
            transform: translateX(5px);
        }

        .checklist-item input[type="checkbox"] {
            width: 24px;
            height: 24px;
            cursor: pointer;
        }

        .checklist-item.completed {
            opacity: 0.6;
            text-decoration: line-through;
        }

        /* Simulador */
        .scenario {
            background: var(--color-bg);
            padding: 2rem;
            border-radius: 10px;
            margin-bottom: 1.5rem;
            border-left: 4px solid var(--color-accent);
        }

        .scenario-options {
            display: grid;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .scenario-option {
            background: white;
            padding: 1.5rem;
            border: 2px solid var(--color-secondary);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .scenario-option:hover {
            border-color: var(--color-accent);
            transform: translateX(5px);
        }

        .scenario-result {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            margin-top: 1rem;
        }

        .scenario-result.success {
            border-left: 4px solid var(--color-success);
        }

        .scenario-result.warning {
            border-left: 4px solid var(--color-warning);
        }

        .scenario-result.danger {
            border-left: 4px solid var(--color-danger);
        }

        /* Temporizador */
        .timer-presets {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .timer-display {
            background: var(--color-primary);
            color: white;
            padding: 3rem;
            border-radius: 10px;
            text-align: center;
            font-size: 3rem;
            font-weight: bold;
            margin: 1.5rem 0;
            font-family: 'Courier New', monospace;
        }

        .timer-controls {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }

        /* Loading Spinner */
        .spinner {
            border: 4px solid rgba(0, 0, 0, 0.1);
            border-left-color: var(--color-accent);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
            margin: 2rem auto;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Alertas */
        .alert {
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1rem;
        }

        .alert-success {
            background: #d4edda;
            color: #155724;
            border-left: 4px solid var(--color-success);
        }

        .alert-warning {
            background: #fff3cd;
            color: #856404;
            border-left: 4px solid var(--color-warning);
        }

        .alert-danger {
            background: #f8d7da;
            color: #721c24;
            border-left: 4px solid var(--color-danger);
        }

        /* Footer */
        footer {
            background: var(--color-primary);
            color: white;
            text-align: center;
            padding: 2rem 1rem;
            margin-top: 3rem;
        }

        footer p {
            margin: 0.5rem 0;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .container {
                padding: 0 0.5rem;
            }

            .card {
                padding: 1.5rem;
            }

            .timer-display {
                font-size: 2rem;
                padding: 2rem;
            }

            #map {
                height: 350px;
            }
        }

        /* Utilidades */
        .hidden {
            display: none !important;
        }

        .text-center {
            text-align: center;
        }

        .mt-2 {
            margin-top: 2rem;
        }