/* Back Rehab MVP Styles - Обновленная версия */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* Color scheme */
:root {
    --primary-blue: #2563eb;
    --primary-blue-dark: #1d4ed8;
    --primary-green: #059669;
    --primary-green-dark: #047857;
    --light-blue: #dbeafe;
    --light-green: #d1fae5;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --red-500: #ef4444;
    --red-600: #dc2626;
}

/* Typography */
h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
    line-height: 1.2;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--gray-600);
}

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

.section {
    padding: 3rem 0;
}

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

/* Hero section */
.hero {
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--light-green) 100%);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero .subtitle {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--primary-blue-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

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

.btn-success:hover {
    background-color: var(--primary-green-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-small {
    font-size: 0.875rem;
    color: var(--gray-600);
    text-decoration: none;
    margin-top: 0.5rem;
    display: block;
}

/* Cards and content blocks */
.card {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
}

.steps {
    display: grid;
    gap: 2rem;
    margin: 2rem 0;
}

.step {
    text-align: center;
    padding: 1.5rem;
}

.step-icon {
    width: 3rem;
    height: 3rem;
    background-color: var(--primary-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

.step:nth-child(2) .step-icon {
    background-color: var(--primary-green);
}

.step:nth-child(3) .step-icon {
    background-color: #7c3aed;
}

/* Form styles */
.form-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

.question {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-left: 3px solid var(--primary-green);
}

.question h3 {
    margin-bottom: 1rem;
    color: var(--gray-800);
    line-height: 1.4;
}

.form-group {
    margin-bottom: 1rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--gray-200);
    border-radius: 0.375rem;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Radio and checkbox groups */
.radio-group, .checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.radio-item, .checkbox-item {
    display: flex;
    align-items: flex-start;
    padding: 1rem;
    border: 2px solid var(--gray-200);
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--gray-50);
}

.radio-item:hover, .checkbox-item:hover {
    border-color: var(--primary-blue);
    background: var(--light-blue);
}

.radio-item input, .checkbox-item input {
    margin-right: 0.75rem;
    margin-top: 0.25rem;
    transform: scale(1.2);
}

.radio-item span, .checkbox-item span {
    flex: 1;
    line-height: 1.4;
}

.radio-item.selected, .checkbox-item.selected {
    border-color: var(--primary-blue);
    background: var(--light-blue);
}

/* Progress bar */
.progress-container {
    margin-bottom: 2rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
}

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

/* Section headers */
.section-header {
    background: var(--light-blue);
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--primary-blue);
    text-align: center;
}

.section-header h2 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.section-subtitle {
    color: var(--gray-600);
    font-size: 1rem;
    margin: 0;
}

/* Navigation buttons */
.navigation-buttons {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
    padding: 1rem 0;
}

/* Modal styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: white;
    border-radius: 0.75rem;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.15);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-content h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
    text-align: center;
}

.modal-content form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.modal-content input {
    padding: 0.75rem;
    border: 2px solid var(--gray-300);
    border-radius: 0.375rem;
    font-size: 1rem;
}

.modal-content input:focus {
    outline: none;
    border-color: var(--primary-blue);
}

/* Warning styles */
.red-flag-warning {
    background: linear-gradient(135deg, #fee2e2, #fef3f2);
    border: 3px solid var(--red-500);
    border-radius: 0.75rem;
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
    animation: pulse 2s infinite;
}

.red-flag-warning h2 {
    color: var(--red-600);
    margin-bottom: 1rem;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* FAQ */
.faq {
    background-color: var(--gray-50);
}

.faq-item {
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem 0;
}

.faq-question {
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-radius: 0.375rem;
    transition: background-color 0.2s ease;
}

.faq-question:hover {
    background-color: var(--light-blue);
}

.faq-answer {
    margin-top: 0.5rem;
    color: var(--gray-600);
    display: none;
    padding: 1rem;
    background: white;
    border-radius: 0.375rem;
    margin-left: 1rem;
    margin-right: 1rem;
}

.faq-answer.show {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Result page styles */
.result-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem;
}

.result-header {
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--light-green) 100%);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    border-left: 5px solid var(--primary-blue);
}

.result-header h1 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1.8rem;
}

.recommendations-section {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-left: 4px solid var(--primary-green);
}

.recommendations-section h3 {
    color: var(--primary-green);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.recommendations-list {
    list-style: none;
    padding: 0;
}

.recommendations-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-100);
    position: relative;
    padding-left: 2rem;
    line-height: 1.5;
}

.recommendations-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-green);
    font-weight: bold;
    font-size: 1.2rem;
}

.recommendations-list li:last-child {
    border-bottom: none;
}

/* Exercise styles */
.exercises-section {
    background: var(--gray-50);
    border-radius: 0.75rem;
    padding: 2rem;
    margin: 2rem 0;
}

.exercises-section h3 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1.4rem;
    text-align: center;
}

.exercises-subtitle {
    text-align: center;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
    font-style: italic;
}

.exercise-item {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--primary-blue);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.exercise-name {
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.exercise-description {
    color: var(--gray-700);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.exercise-sets {
    font-size: 0.95rem;
    color: var(--primary-green);
    font-weight: 600;
    background: var(--light-green);
    padding: 0.5rem;
    border-radius: 0.25rem;
}

/* App promotion */
.app-promotion {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    color: white;
    border-radius: 0.75rem;
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
}

.app-promotion h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.store-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.store-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    border-radius: 0.5rem;
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

/* Email signup */
.email-signup {
    background: white;
    border-radius: 0.5rem;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
}

.email-form {
    display: flex;
    gap: 1rem;
    max-width: 400px;
    margin: 1rem auto 0;
}

.email-input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--gray-300);
    border-radius: 0.375rem;
    font-size: 1rem;
}

.email-input:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.email-submit {
    padding: 0.75rem 1.5rem;
    background: var(--primary-green);
    color: white;
    border: none;
    border-radius: 0.375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.email-submit:hover {
    background: var(--primary-green-dark);
}

/* Thank you message */
.thank-you {
    background: var(--light-green);
    border: 2px solid var(--primary-green);
    border-radius: 0.5rem;
    padding: 1.5rem;
    text-align: center;
    color: var(--primary-green);
}

.thank-you h4 {
    color: var(--primary-green);
    margin-bottom: 0.5rem;
}

/* Warning notes */
.warning-note {
    background: var(--light-blue);
    border: 2px solid var(--primary-blue);
    border-radius: 0.5rem;
    padding: 1rem;
    margin: 1rem 0;
    text-align: center;
}

.warning-note p {
    margin: 0;
    color: var(--primary-blue);
    font-weight: 500;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0.5rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .navigation-buttons {
        flex-direction: column;
    }
    
    .question {
        padding: 1rem;
    }
    
    .section-header {
        padding: 1rem;
    }
    
    .result-header {
        padding: 1.5rem;
    }
    
    .exercises-section {
        padding: 1.5rem;
    }
    
    .exercise-item {
        padding: 1rem;
    }
    
    .email-form {
        flex-direction: column;
    }
    
    .store-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .modal-content {
        margin: 1rem;
        padding: 1.5rem;
    }
}

@media (min-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero .subtitle {
        font-size: 1.25rem;
    }
    
    .steps {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 2rem;
    }
    
    .hero {
        padding: 6rem 0;
    }
    
    .section {
        padding: 4rem 0;
    }
}

/* Utility classes */
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }

.hidden { display: none !important; }
.block { display: block !important; }

/* Loading states */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.spinner {
    border: 2px solid var(--gray-200);
    border-top: 2px solid var(--primary-blue);
    border-radius: 50%;
    width: 1rem;
    height: 1rem;
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-right: 0.5rem;
}

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