:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #e5e7eb;
    --secondary-hover: #d1d5db;
    --text-dark: #333;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --background-light: #f9f9f9;
    --background-white: #ffffff;
    --background-dark: #1f2937;
    --border-color: #e5e7eb;
    --accent-color: #fbbf24;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius-sm: 6px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-full: 50%;
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 30px;
    --spacing-2xl: 40px;
    --spacing-3xl: 60px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    --line-height-tight: 1.2;
    --line-height-base: 1.6;
    --transition-fast: 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: var(--line-height-base);
    color: var(--text-dark);
    background-color: var(--background-light);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
}

a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

h1, h2, h3, h4, h5 {
    font-weight: 700;
    line-height: var(--line-height-tight);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
}

p {
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-align: center;
}

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

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-dark);
}

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

header {
    background-color: var(--background-white);
    box-shadow: var(--shadow-medium);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-circle {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    border-radius: var(--border-radius-full);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--background-white);
    font-weight: bold;
    font-size: var(--font-size-lg);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-links a {
    color: #555;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--text-dark);
}

.project-header {
    padding: 150px 0 var(--spacing-3xl);
    background-color: var(--background-white);
}

.breadcrumbs {
    margin-bottom: var(--spacing-lg);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.project-meta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.meta-icon {
    color: var(--primary-color);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.tag {
    background-color: #dbeafe;
    color: #1e40af;
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) 12px;
    border-radius: var(--spacing-lg);
}

.project-content {
    padding: var(--spacing-3xl) 0;
}

.project-image {
    width: 100%;
    height: 400px;
    background-color: var(--secondary-color);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-light);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.project-section {
    margin-bottom: 50px;
}

.project-section p {
    color: #4b5563;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.result-card {
    background-color: var(--background-white);
    padding: 25px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: transform var(--transition-fast);
}

.result-card:hover {
    transform: translateY(-5px);
}

.result-number {
    font-size: var(--font-size-4xl);
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.result-label {
    color: var(--text-muted);
}

.chart-container {
    background-color: var(--background-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-light);
    margin: var(--spacing-xl) 0;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.dashboard-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--background-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-light);
    margin: var(--spacing-xl) 0;
    overflow: hidden;
}

.dashboard-container iframe {
    width: 100%;
    border: none;
}

.methodology-steps {
    counter-reset: step;
    margin: var(--spacing-xl) 0;
}

.step {
    position: relative;
    padding-left: 50px;
    margin-bottom: var(--spacing-xl);
}

.step::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 36px;
    height: 36px;
    background-color: var(--primary-color);
    color: var(--background-white);
    border-radius: var(--border-radius-full);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.step h4 {
    margin-bottom: var(--spacing-sm);
}

.diagnostic-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--background-white);
    padding: var(--spacing-3xl) 0;
    margin: var(--spacing-3xl) 0;
    border-radius: var(--border-radius-xl);
}

.diagnostic-header {
    text-align: center;
    margin-bottom: 50px;
}

.diagnostic-badge {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--background-white);
    padding: 8px var(--spacing-md);
    border-radius: var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    display: inline-block;
    margin-bottom: var(--spacing-lg);
}

.diagnostic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-2xl) 0;
}

.diagnostic-card {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.diagnostic-card:hover {
    transform: translateY(-5px);
    background-color: rgba(255, 255, 255, 0.15);
}

.diagnostic-card h4 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.diagnostic-card p {
    color: rgba(255, 255, 255, 0.9);
    line-height: var(--line-height-base);
}

.insight-highlight {
    background-color: rgba(251, 191, 36, 0.2);
    border-left: 4px solid var(--accent-color);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius-md);
}

.insight-highlight h4 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-sm);
}

.timeline-visual {
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-xl) 0;
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
}

.timeline-year {
    background-color: var(--accent-color);
    color: var(--background-dark);
    padding: 8px var(--spacing-md);
    border-radius: var(--spacing-lg);
    font-weight: bold;
    margin-right: var(--spacing-lg);
    min-width: 80px;
    text-align: center;
}

.next-prev {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.next-prev a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.next-prev-arrow {
    font-size: var(--font-size-xl);
}

.cta {
    background-color: #f3f4f6;
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.cta h2 {
    margin-bottom: var(--spacing-lg);
}

footer {
    background-color: var(--background-dark);
    color: var(--background-white);
    padding: var(--spacing-2xl) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo-circle {
    width: 30px;
    height: 30px;
    background-color: var(--primary-color);
    border-radius: var(--border-radius-full);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--background-white);
    font-weight: bold;
    font-size: var(--font-size-sm);
}

.footer-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-nav a {
    color: var(--text-light);
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: var(--background-white);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    color: var(--text-light);
    transition: color var(--transition-fast);
}

.footer-social a:hover {
    color: var(--background-white);
}

.footer-bottom {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid #374151;
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--background-white);
        flex-direction: column;
        box-shadow: var(--shadow-medium);
        padding: var(--spacing-lg);
    }

    .nav-links.mobile-open {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer-logo {
        justify-content: center;
    }

    .next-prev {
        flex-direction: column;
        gap: var(--spacing-lg);
        align-items: center;
    }

    .dashboard-container iframe {
        height: 300px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .project-meta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .diagnostic-grid {
        grid-template-columns: 1fr;
    }

    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .timeline-year {
        margin-right: 0;
        margin-bottom: var(--spacing-sm);
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

img {
    max-width: 100%;
    height: auto;
}

ul, ol {
    margin-left: 25px;
    margin-bottom: var(--spacing-lg);
}

code {
    background-color: var(--secondary-color);
    padding: 2px 4px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}