:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --dark-color: #1f2937;
    --light-color: #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;
    --border-radius: 12px;
    --box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--light-color);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%);
    z-index: 1;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

.feature-item i {
    font-size: 1.2rem;
    color: var(--secondary-color);
}

.cta-button {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.report-preview {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    width: 100%;
    max-width: 400px;
    color: var(--gray-700);
    transform: perspective(1000px) rotateY(-5deg) rotateX(10deg);
}

.preview-header {
    text-align: center;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--gray-200);
    padding-bottom: 1rem;
}

.preview-header h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.preview-header p {
    color: var(--gray-500);
    font-size: 1.1rem;
}

.preview-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    margin-bottom: 0.5rem;
    background: var(--gray-100);
    border-radius: 8px;
}

.preview-section i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Form Section */
.form-section {
    padding: 6rem 0;
    background: white;
}

.form-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 3rem;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--gray-200);
}

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

.form-header h2 {
    font-size: 2.5rem;
    color: var(--gray-800);
}

.form-header p {
    font-size: 1.1rem;
    color: var(--gray-500);
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.form-control, .form-select {
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
}

.form-control-lg, .form-select-lg {
    padding: 1rem 1.25rem;
    font-size: 1.1rem;
}

/* Loading Section */
.loading-section {
    padding: 6rem 0;
    background: var(--gray-100);
}

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

.loading-spinner {
    margin-bottom: 2rem;
}

.loading-spinner .spinner-border {
    width: 4rem;
    height: 4rem;
    border-width: 0.3rem;
}

.loading-title {
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.loading-text {
    color: var(--gray-600);
    font-size: 1.1rem;
}

.progress {
    height: 8px;
    border-radius: 4px;
    background-color: var(--gray-300);
}

.progress-bar {
    background-color: var(--primary-color);
    border-radius: 4px;
}

/* Results Section */
.results-section {
    padding: 4rem 0;
    background: white;
}

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

.results-header h2 {
    font-size: 2.5rem;
    color: var(--gray-800);
}

/* Report Content */
.report-content {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

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

.report-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.report-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.report-date {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--secondary-color);
}

.report-body {
    padding: 3rem 2rem;
}

.report-section {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--gray-200);
}

.report-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.section-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.section-title {
    font-size: 1.8rem;
    color: var(--gray-800);
    margin: 0;
}

.section-content {
    line-height: 1.8;
    color: var(--gray-700);
}

.section-content h4 {
    color: var(--primary-color);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.section-content ul {
    list-style: none;
    padding: 0;
}

.section-content li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gray-100);
    position: relative;
    padding-left: 1.5rem;
}

.section-content li:before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.highlight-box {
    background: var(--gray-100);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.stat-item {
    background: var(--gray-100);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Footer */
.footer {
    background: var(--gray-800);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-features {
        grid-template-columns: 1fr;
    }
    
    .form-card {
        padding: 2rem;
    }
    
    .report-header {
        padding: 2rem 1rem;
    }
    
    .report-title {
        font-size: 2rem;
    }
    
    .report-body {
        padding: 2rem 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .form-card {
        padding: 1.5rem;
    }
    
    .report-title {
        font-size: 1.8rem;
    }
    
    .section-header {
        flex-direction: column;
        text-align: center;
    }
}

/* Print Styles */
@media print {
    .hero-section,
    .form-section,
    .loading-section,
    .results-header,
    .footer {
        display: none !important;
    }
    
    .results-section {
        padding: 0;
    }
    
    .report-content {
        box-shadow: none;
        border: none;
    }
    
    .report-section {
        page-break-inside: avoid;
    }
}

/* Custom Button Styles */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transition: var(--transition);
}

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

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

.btn-success:hover {
    transform: translateY(-1px);
}

/* Utility Classes */
.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.border-primary {
    border-color: var(--primary-color) !important;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

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

.slide-up {
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}