/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #1e293b;
    line-height: 1.6;
    min-height: 100vh;
}

/* Variables CSS */
:root {
    --primary-blue: #2563eb;
    --primary-blue-light: #3b82f6;
    --primary-blue-dark: #1d4ed8;
    --accent-orange: #f97316;
    --accent-orange-light: #fb923c;
    --success-green: #10b981;
    --warning-yellow: #f59e0b;
    --danger-red: #ef4444;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --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: 12px;
    --border-radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Layout principal */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.home-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition);
}

.home-btn:hover {
    background: var(--gray-200);
    transform: translateY(-1px);
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-blue-light));
    border-radius: 4px;
    transition: width 0.5s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-600);
    min-width: 3rem;
}

/* Main content */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
}

/* Screens */
.screen {
    display: none;
    width: 100%;
    max-width: 800px;
    animation: fadeIn 0.5s ease;
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Welcome Screen */
.welcome-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
}

.welcome-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    color: white;
}

.welcome-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.welcome-subtitle {
    font-size: 1.25rem;
    color: var(--accent-orange);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.welcome-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 2.5rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.start-btn {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 2rem;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0 auto;
}

.start-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Quiz Screen */
.quiz-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
}

.case-header {
    background: var(--gray-50);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.case-type {
    background: var(--primary-blue);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
}

.case-context {
    background: var(--accent-orange);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
}

.case-content {
    padding: 2rem;
}

.case-text {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--gray-700);
    background: var(--gray-50);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-blue);
}

.question-section {
    padding: 0 2rem 2rem;
}

.question-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.answer-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

.answer-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.ok-btn:hover {
    border-color: var(--success-green);
    background: rgba(16, 185, 129, 0.05);
}

.conditions-btn:hover {
    border-color: var(--warning-yellow);
    background: rgba(245, 158, 11, 0.05);
}

.avoid-btn:hover {
    border-color: var(--danger-red);
    background: rgba(239, 68, 68, 0.05);
}

.btn-icon {
    font-size: 1.5rem;
    min-width: 2rem;
}

.btn-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.btn-text strong {
    font-weight: 600;
    color: var(--gray-900);
}

.btn-text span {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Feedback Screen */
.feedback-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
}

.feedback-result {
    padding: 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.feedback-result.correct {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
    border-bottom: 1px solid rgba(16, 185, 129, 0.2);
}

.feedback-result.incorrect {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
    border-bottom: 1px solid rgba(239, 68, 68, 0.2);
}

.result-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.feedback-result.correct .result-icon {
    background: var(--success-green);
    color: white;
}

.feedback-result.incorrect .result-icon {
    background: var(--danger-red);
    color: white;
}

.result-text {
    font-size: 1.25rem;
    font-weight: 600;
}

.feedback-result.correct .result-text {
    color: var(--success-green);
}

.feedback-result.incorrect .result-text {
    color: var(--danger-red);
}

.feedback-content {
    padding: 2rem;
}

.feedback-section {
    margin-bottom: 1.5rem;
}

.feedback-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.feedback-text {
    color: var(--gray-700);
    line-height: 1.6;
}

.feedback-tags {
    margin-top: 1.5rem;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.feedback-actions {
    padding: 0 2rem 2rem;
}

.next-btn {
    background: var(--primary-blue);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

.next-btn:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-1px);
}

/* Results Screen */
.results-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
}

.results-header {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    color: white;
    padding: 3rem 2rem;
    text-align: center;
}

.results-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.results-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.score-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.score-number {
    font-size: 3rem;
    font-weight: 700;
}

.score-label {
    font-size: 1rem;
    opacity: 0.9;
}

.results-content {
    padding: 2rem;
}

.reflexes-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.reflexes-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.reflex-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.reflex-icon {
    font-size: 1.5rem;
    min-width: 2rem;
}

.reflex-text {
    line-height: 1.6;
    color: var(--gray-700);
}

.reflex-text strong {
    color: var(--gray-900);
}

.results-actions {
    padding: 0 2rem 2rem;
}

.replay-btn {
    background: var(--accent-orange);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0 auto;
}

.replay-btn:hover {
    background: var(--accent-orange-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        padding: 0 1rem;
    }
    
    .progress-bar {
        width: 120px;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .welcome-card {
        padding: 2rem 1.5rem;
    }
    
    .welcome-title {
        font-size: 2rem;
    }
    
    .case-header {
        padding: 1rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .case-content {
        padding: 1.5rem 1rem;
    }
    
    .question-section {
        padding: 0 1rem 1.5rem;
    }
    
    .feedback-content {
        padding: 1.5rem 1rem;
    }
    
    .feedback-actions {
        padding: 0 1rem 1.5rem;
    }
    
    .results-header {
        padding: 2rem 1rem;
    }
    
    .results-content {
        padding: 1.5rem 1rem;
    }
    
    .results-actions {
        padding: 0 1rem 1.5rem;
    }
    
    .score-number {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .answer-buttons {
        gap: 0.75rem;
    }
    
    .answer-btn {
        padding: 1rem;
    }
    
    .btn-text {
        gap: 0.125rem;
    }
    
    .reflex-item {
        gap: 0.75rem;
    }
    
    .case-text {
        padding: 1rem;
        font-size: 1rem;
    }
}