/* Modern Reset */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #C8E6C9;
    --secondary: #2196F3;
    --accent: #FFC107;
    --text: #333;
    --text-light: #666;
    --bg: #f8f9fa;
    --card-bg: #fff;
    --border: #e0e0e0;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

/* Body and General Styling */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--bg);
    color: var(--text);
    padding: 0;
}



/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 1rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path fill="rgba(255,255,255,0.05)" d="M0,0 L100,0 L100,100 L0,100 Z"></path></svg>');
    background-size: cover;
}

.hero-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
    position: relative;
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    opacity: 0.9;
}

.hero-progress {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    position: relative;
    z-index: 1;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 1.5rem;
    position: relative;
    opacity: 0.6;
    transition: var(--transition);
}

.progress-step.active {
    opacity: 1;
}

.progress-step span {
    width: 40px;
    height: 40px;
    background: white;
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-bottom: 0.5rem;
    border: 3px solid white;
    box-shadow: 0 0 0 2px var(--primary);
}

.progress-step p {
    font-size: 0.9rem;
    font-weight: 500;
}

.progress-step.active span {
    background: var(--primary);
    color: white;
}

.progress-step::after {
    content: "";
    position: absolute;
    top: 20px;
    left: calc(100% + 10px);
    width: 3rem;
    height: 2px;
    background: white;
    opacity: 0.3;
}

.progress-step:last-child::after {
    display: none;
}

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

/* Form Steps */
.form-step {
    display: none;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

.form-step.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.form-step h2 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.form-step h2 i {
    font-size: 1.4rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Form Groups */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    display: block;
    font-weight: 500;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group label i {
    color: var(--primary);
}

.info-tooltip {
    cursor: help;
    color: var(--text-light);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.3rem;
}

input[type="number"],
input[type="text"],
textarea,
select {
    width: 100%;
    padding: 0.8rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    transition: var(--transition);
    background: var(--card-bg);
    font-family: inherit;
}

input[type="number"]:focus,
input[type="text"]:focus,
textarea:focus,
select:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
}

/* Buttons */
button,
.btn-next,
.btn-prev,
.btn-submit,
.btn-new,
.btn-expert {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
}

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

.btn-next:hover,
.btn-submit:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-prev {
    background-color: #f5f5f5;
    color: var(--text);
}

.btn-prev:hover {
    background-color: #e0e0e0;
}

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

.btn-expert {
    background-color: var(--accent);
    color: #333;
}

.form-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
}

/* Symptoms Section */
.symptoms-section h3 {
    margin-bottom: 1rem;
    color: var(--text);
    font-size: 1.2rem;
}

.symptoms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.symptom-checkbox {
    display: block;
}

.symptom-checkbox input {
    display: none;
}

.symptom-card {
    padding: 1rem;
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.symptom-card i {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.symptom-checkbox input:checked + .symptom-card {
    border-color: var(--primary);
    background-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

/* Uploads Section */
.uploads-section h3 {
    margin: 1.5rem 0 1rem;
    color: var(--text);
    font-size: 1.2rem;
}

.upload-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}

.upload-card {
    padding: 1.5rem 1rem;
    background: var(--card-bg);
    border: 2px dashed var(--border);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.upload-card:hover {
    border-color: var(--primary);
    background: rgba(76, 175, 80, 0.05);
}

.upload-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 0.8rem;
}

.upload-card span {
    font-weight: 500;
}

.preview-container {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.preview-container img,
.preview-container video {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
}

#pdfPreview {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--primary);
}

/* Options Section */
.options-section h3 {
    margin-bottom: 1rem;
    color: var(--text);
    font-size: 1.2rem;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.option-radio {
    display: block;
}

.option-radio input {
    display: none;
}

.option-card {
    padding: 1.5rem;
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    height: 100%;
}

.option-card i {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.option-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text);
}

.option-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.option-radio input:checked + .option-card {
    border-color: var(--primary);
    background-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

.expert-details {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* Summary Section */
.summary-section h3 {
    margin-bottom: 1rem;
    color: var(--text);
    font-size: 1.2rem;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.summary-card {
    padding: 1rem;
    background: var(--primary-light);
    border-radius: 8px;
}

.summary-card h4 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.summary-card p {
    font-size: 1rem;
    font-weight: 500;
}

/* Results Section */
.results-section {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
    animation: fadeIn 0.5s ease;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.results-header h2 {
    color: var(--primary);
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.results-header h2 i {
    font-size: 1.4rem;
}

.results-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-light);
    position: relative;
    transition: var(--transition);
}

.tab-btn.active {
    color: var(--primary);
}

.tab-btn.active::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

#resultsContent {
    line-height: 1.7;
}

#resultsContent h3 {
    margin: 1.5rem 0 1rem;
    color: var(--primary-dark);
}

#resultsContent ul {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

#resultsContent li {
    margin-bottom: 0.5rem;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.resource-card {
    padding: 1.5rem;
    background: var(--primary-light);
    border-radius: 8px;
    transition: var(--transition);
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.resource-card h4 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.resource-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.resource-card a {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.expert-cta {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(33, 150, 243, 0.1);
    border-radius: 8px;
    text-align: center;
}

.expert-cta h3 {
    color: var(--secondary);
    margin-bottom: 0.5rem;
}

.expert-cta p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

/* Footer */
footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 2rem;
            text-align: center;
        }
        
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            text-align: left;
        }
        
        .footer-column h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 0.75rem;
        }
        
        .footer-column ul li a {
            color: #adb5bd;
            text-decoration: none;
            transition: var(--transition);
        }
        
        .footer-column ul li a:hover {
            color: white;
        }
        
        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }
        
        .social-links a {
            color: white;
            background-color: rgba(255, 255, 255, 0.1);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        
        .social-links a:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        
        .copyright {
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #adb5bd;
            font-size: 0.9rem;
        }

/* Responsive Design for Tablets */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }

    .progress-step {
        margin: 0 0.8rem;
    }
    
    .progress-step p {
        font-size: 0.8rem;
    }
    
    .form-actions {
        flex-direction: column;
        gap: 1rem;
    }
    
    .btn-prev,
    .btn-next,
    .btn-submit {
        width: 100%;
    }

    /* Form grids: make items stack if too narrow */
    .form-grid,
    .symptoms-grid,
    .upload-options,
    .options-grid,
    .summary-cards,
    .resources-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

/* Responsive Design for Mobile Phones */
@media (max-width: 480px) {
    header nav ul li {
        margin: 0 0.5rem;
    }
    
    .hero-content h1 {
        font-size: 1.5rem; /* smaller for very narrow screens */
    }
    
    .hero-content p {
        font-size: 0.9rem;
    }
    
    .progress-step {
        margin: 0 0.5rem;
        flex-direction: column; /* stack steps vertically if needed */
    }
    
    .progress-step span {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }
    
    .progress-step::after {
        display: none; /* remove connector line for vertical stack */
    }
    
    .form-step {
        padding: 1rem 0.8rem;
    }

    /* Make grids single column */
    .form-grid,
    .symptoms-grid,
    .upload-options,
    .options-grid,
    .summary-cards,
    .resources-grid {
        grid-template-columns: 1fr;
    }

    /* Upload previews smaller */
    .preview-container img,
    .preview-container video {
        width: 60px;
        height: 60px;
    }

    /* Results tabs scrollable horizontally */
    .results-tabs {
        overflow-x: auto;
        gap: 0.5rem;
    }
    .tab-btn {
        flex: 0 0 auto;
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    /* Buttons full width */
    .btn-prev,
    .btn-next,
    .btn-submit {
        width: 100%;
    }
    
    /* Footer spacing */
    .footer-content {
        gap: 1rem;
    }
}

/* Expert details form */
.expert-details {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: rgba(33, 150, 243, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(33, 150, 243, 0.2);
}

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

/* Request sent message */
.request-sent {
    text-align: center;
    padding: 3rem;
}

.request-sent i {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.request-sent h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.request-sent p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}