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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #059669;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --background-color: #f8fafc;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Container principal */
.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--white);
    min-height: 100vh;
    box-shadow: var(--shadow-xl);
}

/* Header */
.header {
    background: var(--white);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: var(--gray-50);
}

/* Páginas */
.page {
    display: none;
    min-height: calc(100vh - 80px);
}

.page.active {
    display: block;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 4rem 2rem;
    text-align: center;
}

.hero-content h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.course-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.info-item i {
    font-size: 1.25rem;
    opacity: 0.8;
}

/* Registration Section */
.registration-section,
.start-section {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 4rem 2rem;
    background: var(--gray-50);
}

.form-container,
.start-container {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    max-width: 600px;
    width: 100%;
}

.start-container h3,
.form-container h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-800);
}

.start-container p,
.form-container p {
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    min-width: 200px;
}

.registration-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.info-panel {
    padding: 2.5rem;
}

.info-panel h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--gray-800);
}

.info-panel ul {
    list-style: none;
    margin-bottom: 2rem;
}

.info-panel li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--gray-700);
}

.info-panel li i {
    color: var(--success-color);
    font-size: 0.875rem;
}

.requirements {
    background: var(--primary-color);
    color: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 2rem;
}

.requirements h4 {
    color: var(--white);
    margin-bottom: 0.75rem;
}

.requirements p {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

/* Botones */
.btn-primary,
.btn-secondary,
.btn-success {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    min-width: 140px;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-200);
}

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

.btn-success:hover:not(:disabled) {
    background: #047857;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:disabled,
.btn-secondary:disabled,
.btn-success:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Quiz Styles */
.quiz-header {
    background: var(--white);
    padding: 2rem;
    border-bottom: 1px solid var(--gray-200);
    text-align: center;
}

.quiz-header h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--gray-800);
}

.progress-container {
    max-width: 500px;
    margin: 0 auto;
}

.progress-bar {
    background: var(--gray-200);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    height: 100%;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    color: var(--gray-600);
    font-weight: 500;
}

.quiz-container {
    padding: 2rem;
    display: flex;
    justify-content: center;
    background: var(--gray-50);
    min-height: calc(100vh - 200px);
}

.question-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    max-width: 800px;
    width: 100%;
    height: fit-content;
}

.question-number {
    background: var(--primary-color);
    color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
}

.question-text {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    color: var(--gray-800);
    line-height: 1.5;
    flex: 1;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.option {
    padding: 1rem 1.25rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    background: var(--white);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.option:hover {
    border-color: var(--primary-color);
    background: var(--gray-50);
}

.option.selected {
    border-color: var(--primary-color);
    background: rgb(37 99 235 / 0.05);
}

.option input[type="radio"] {
    margin: 0;
    accent-color: var(--primary-color);
}

.view-class-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    white-space: nowrap;
    background: var(--gray-50);
}

.view-class-link:hover {
    background: var(--primary-color);
    color: var(--white);
}

.view-class-link i {
    font-size: 1rem;
}

.quiz-controls {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

/* Results Styles */
.results-container {
    padding: 4rem 2rem;
    text-align: center;
    background: var(--gray-50);
    min-height: calc(100vh - 80px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.results-header {
    margin-bottom: 3rem;
}

.result-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.result-icon.success {
    color: var(--success-color);
}

.result-icon.fail {
    color: var(--danger-color);
}

.result-icon.success::before {
    content: "🎉";
}

.result-icon.fail::before {
    content: "😔";
}

#result-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--gray-800);
}

#result-message {
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.review-classes-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    margin: 0.5rem 0;
}

.review-classes-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.review-classes-link i {
    font-size: 1.2rem;
}

.score-display {
    margin: 3rem 0;
}

.score-circle {
    background: var(--white);
    border-radius: 50%;
    width: 200px;
    height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
}

.score-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.score-label {
    color: var(--gray-600);
    font-weight: 500;
    margin-top: 0.5rem;
}

.result-details {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-md);
    max-width: 500px;
    width: 100%;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-item .label {
    font-weight: 500;
    color: var(--gray-700);
}

.detail-item .value {
    font-weight: 600;
    color: var(--gray-800);
}

.result-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Certificate Data Page */
.certificate-data-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem;
    background: var(--gray-50);
    min-height: calc(100vh - 80px);
}

.certificate-header {
    text-align: center;
    margin-bottom: 3rem;
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.success-icon {
    font-size: 4rem;
    color: var(--warning-color);
    margin-bottom: 1rem;
}

.certificate-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.certificate-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 500px;
    margin: 0 auto;
}

.certificate-form-container {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.certificate-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-help {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
    display: block;
}

.checkbox-group {
    margin: 1rem 0;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-300);
    border-radius: 4px;
    background: var(--white);
    position: relative;
    flex-shrink: 0;
    margin-top: 2px;
    transition: var(--transition);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-text {
    color: var(--gray-700);
    font-size: 0.95rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    margin-top: 1.5rem;
}

.privacy-notice {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.privacy-notice h4 {
    color: var(--gray-800);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.privacy-notice h4 i {
    color: var(--primary-color);
}

.privacy-notice p {
    color: var(--gray-600);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-xl);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        /* flex-direction: column; */
        gap: 1rem;
        text-align: center;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    .course-info {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }

    .registration-section,
    .start-section {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem 1rem;
    }

    .form-container,
    .info-panel,
    .start-container {
        padding: 1.5rem;
    }

    .quiz-container {
        padding: 1rem;
    }

    .question-card {
        padding: 1.5rem;
    }

    .quiz-controls {
        flex-direction: column;
    }

    .results-container {
        padding: 2rem 1rem;
    }

    .score-circle {
        width: 150px;
        height: 150px;
    }

    .score-number {
        font-size: 2rem;
    }

    .result-actions {
        flex-direction: column;
        align-items: center;
    }

    .certificate-data-container {
        padding: 2rem 1rem;
    }

    .certificate-form-container,
    .certificate-header {
        padding: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .form-actions {
        flex-direction: column;
    }
}

/* Utility Classes */
.hide-mobile {
    display: block;
}

@media (width < 768px) {
    .hide-mobile {
        display: none !important;
    }
}

@media (max-width: 480px) {
    .container {
        margin: 0;
        box-shadow: none;
    }

    .hero {
        padding: 2rem 1rem;
    }

    .hero-content h2 {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .question-card {
        padding: 1rem;
    }

    .question-text {
        font-size: 1.125rem;
    }
}