/* Clean Avenir Style - MCMC Atlas */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Avenir', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #2c2c2c;
    background-color: #ffffff;
    font-size: 16px;
    letter-spacing: -0.01em;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: #ffffff;
    color: #2c2c2c;
    padding: 4rem 0 3rem 0;
    text-align: left;
    border-bottom: 1px solid #e5e5e5;
}

.logo {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.logo i {
    margin-right: 0.5rem;
    color: #666666;
    font-size: 2rem;
}

.subtitle {
    font-size: 1.1rem;
    color: #666666;
    max-width: 600px;
    font-weight: 300;
    line-height: 1.6;
}

/* Navigation */
.navbar {
    background: #ffffff;
    border-bottom: 1px solid #e5e5e5;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-links {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
}

.nav-link {
    color: #666666;
    text-decoration: none;
    padding: 1.5rem 2rem;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
    position: relative;
    border-bottom: 3px solid transparent;
}

.nav-link:hover {
    color: #2c2c2c;
    background: #f8f8f8;
}

.nav-link.active {
    color: #2c2c2c;
    border-bottom-color: #2c2c2c;
    background: #f8f8f8;
}

/* Main content */
.main {
    min-height: 100vh;
    background: #ffffff;
}

.section {
    display: none;
    padding: 2rem 0;
    border-bottom: 1px solid #000000;
}

.section.active {
    display: block;
}

.section h2 {
    font-size: 2rem;
    color: #2c2c2c;
    margin-bottom: 3rem;
    text-align: left;
    font-weight: 300;
    letter-spacing: -0.02em;
    position: relative;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 60px;
    height: 2px;
    background: #2c2c2c;
}

/* Intro text */
.intro {
    font-size: 0.7rem;
    color: #000000;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 2rem auto;
    line-height: 1.6;
}

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.stat-card {
    background: #ffffff;
    border: 2px solid #000000;
    padding: 1rem;
    text-align: center;
    position: relative;
    transition: all 0.1s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 0px #000000;
}

.stat-card i {
    font-size: 1.5rem;
    color: #000000;
    margin-bottom: 0.5rem;
    display: block;
}

.stat-card h3 {
    font-size: 1.2rem;
    color: #000000;
    margin-bottom: 0.25rem;
}

.stat-card p {
    font-size: 0.6rem;
    color: #000000;
    text-transform: uppercase;
}

/* Search and filters */
.search-filters {
    background: #ffffff;
    border: 2px solid #000000;
    padding: 1rem;
    margin: 2rem 0;
    position: relative;
}

.search-filters::before {
    content: 'FILTERS';
    position: absolute;
    top: -0.5rem;
    left: 1rem;
    background: #ffffff;
    padding: 0 0.5rem;
    font-size: 0.5rem;
    color: #000000;
    text-transform: uppercase;
}

.search-box {
    position: relative;
    margin-bottom: 2rem;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #666666;
    font-size: 1rem;
}

.search-box input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 1px solid #e5e5e5;
    background: #ffffff;
    color: #2c2c2c;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 1rem;
    outline: none;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.search-box input:focus {
    border-color: #2c2c2c;
    box-shadow: 0 0 0 3px rgba(44, 44, 44, 0.1);
}

.filter-controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.filter-controls select {
    padding: 0.75rem 1rem;
    border: 1px solid #e5e5e5;
    background: #ffffff;
    color: #2c2c2c;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.9rem;
    outline: none;
    min-width: 150px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.filter-controls select:focus {
    border-color: #2c2c2c;
    box-shadow: 0 0 0 3px rgba(44, 44, 44, 0.1);
}

/* Algorithm grid - Row Layout */
.algorithms-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.algorithm-row {
    background: #ffffff;
    border: 1px solid #e5e5e5;
    position: relative;
    margin: 1rem 0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.row-header {
    background: #f8f8f8;
    color: #2c2c2c;
    padding: 1rem 1.5rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #e5e5e5;
    border-radius: 8px 8px 0 0;
}

.row-title-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mcmc-logo {
    display: flex;
    align-items: center;
    justify-content: center;
}

.mcmc-logo-icon {
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border: 2px solid #2c2c2c;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.mcmc-logo-icon svg {
    width: 100%;
    height: 100%;
}

.row-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
    color: #2c2c2c;
}

.row-info-dropdown {
    position: relative;
}

.row-algorithms {
    padding: 1.5rem;
    background: #ffffff;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-start;
}

.info-dropdown {
    position: relative;
}

.dropdown-toggle {
    padding: 0.5rem 1rem;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    color: #2c2c2c;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.dropdown-toggle:hover {
    background: #2c2c2c;
    color: #ffffff;
    border-color: #2c2c2c;
}

.dropdown-arrow {
    transition: transform 0.2s ease;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 10;
    margin-top: 0.5rem;
    min-width: 400px;
}

.dropdown-body {
    padding: 2rem;
    max-height: 500px;
    overflow-y: auto;
    line-height: 1.6;
}

.dropdown-body p {
    margin-bottom: 1rem;
    color: #2c2c2c;
    font-size: 1rem;
}

.dropdown-body ul, .dropdown-body ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.dropdown-body li {
    margin-bottom: 0.5rem;
    color: #2c2c2c;
}

.dropdown-body strong {
    color: #2c2c2c;
    font-weight: 600;
}

.dropdown-body h4 {
    color: #2c2c2c;
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}


.example-code {
    margin-bottom: 1rem;
}

.example-code h4 {
    font-size: 0.9rem;
    color: #2c2c2c;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.example-code pre {
    background: #f8f8f8;
    border: 1px solid #e5e5e5;
    border-radius: 4px;
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.example-code code {
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    color: #2c2c2c;
    line-height: 1.4;
}

.process-steps {
    margin-bottom: 1rem;
}

.process-steps h4 {
    font-size: 1rem;
    color: #2c2c2c;
    margin-bottom: 1rem;
    font-weight: 600;
}

.process-steps ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.process-steps li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
    color: #2c2c2c;
}

.process-steps strong {
    color: #2c2c2c;
    font-weight: 600;
}

.process-steps p {
    font-size: 0.9rem;
    color: #666666;
    margin-top: 1rem;
    padding: 0.75rem;
    background: #f8f8f8;
    border-radius: 4px;
    border-left: 3px solid #2c2c2c;
}


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

.algorithms-dropdown-container .algorithm-card {
    margin-bottom: 0;
    min-height: auto;
}

.algorithm-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.algorithm-card {
    background: #ffffff;
    border: 1px solid #e5e5e5;
    padding: 1rem;
    position: relative;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border-radius: 6px;
    min-width: 250px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.algorithm-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-color: #2c2c2c;
}

.algorithm-name {
    font-size: 1.1rem;
    color: #2c2c2c;
    margin-bottom: 0.75rem;
    font-weight: 600;
    border-bottom: 1px solid #e5e5e5;
    padding-bottom: 0.5rem;
}

.algorithm-description {
    font-size: 0.9rem;
    color: #666666;
    margin-bottom: 1rem;
    line-height: 1.5;
    flex-grow: 1;
}

.packages-heading {
    font-size: 0.8rem;
    color: #2c2c2c;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.package-link {
    display: block;
    margin-bottom: 0.75rem;
    padding: 0.75rem;
    border: 1px solid #e5e5e5;
    background: #f8f8f8;
    text-decoration: none;
    transition: all 0.2s ease;
    border-radius: 4px;
}

.package-link:hover {
    background: #2c2c2c;
    color: #ffffff;
    border-color: #2c2c2c;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.package-name {
    font-size: 0.9rem;
    color: #2c2c2c;
    font-weight: 600;
    display: block;
    margin-bottom: 0.25rem;
}

.package-link:hover .package-name {
    color: #ffffff;
}

.package-function {
    font-size: 0.8rem;
    color: #666666;
    font-family: 'Courier New', monospace;
    display: block;
    margin-bottom: 0.25rem;
}

.package-link:hover .package-function {
    color: #ffffff;
}

.package-description {
    font-size: 0.8rem;
    color: #666666;
    line-height: 1.4;
}

.package-link:hover .package-description {
    color: #ffffff;
}

.algorithm-package-link {
    display: block;
    margin-bottom: 0.75rem;
    padding: 0.75rem;
    border: 1px solid #e5e5e5;
    background: #f8f8f8;
    text-decoration: none;
    transition: all 0.2s ease;
    border-radius: 4px;
}

.algorithm-package-link:hover {
    background: #2c2c2c;
    color: #ffffff;
    border-color: #2c2c2c;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.algorithm-package-name {
    font-size: 0.9rem;
    color: #2c2c2c;
    font-weight: 600;
    display: block;
    margin-bottom: 0.25rem;
}

.algorithm-package-link:hover .algorithm-package-name {
    color: #ffffff;
}

.algorithm-package-function {
    font-size: 0.8rem;
    color: #666666;
    font-family: 'Courier New', monospace;
    display: block;
    margin-bottom: 0.25rem;
}

.algorithm-package-link:hover .algorithm-package-function {
    color: #ffffff;
}

.algorithm-package-description {
    font-size: 0.8rem;
    color: #666666;
    line-height: 1.4;
}

.algorithm-package-link:hover .algorithm-package-description {
    color: #ffffff;
}

/* Packages grid */
.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.package-card {
    background: #ffffff;
    border: 2px solid #000000;
    padding: 1rem;
    position: relative;
    transition: all 0.1s ease;
}

.package-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 0px #000000;
}

.package-card h3 {
    font-size: 0.8rem;
    color: #000000;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.package-version {
    font-size: 0.4rem;
    color: #000000;
    background: #000000;
    color: #ffffff;
    padding: 0.2rem 0.4rem;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.package-description {
    font-size: 0.5rem;
    color: #000000;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.package-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.package-links a {
    font-size: 0.4rem;
    color: #000000;
    text-decoration: none;
    padding: 0.2rem 0.4rem;
    border: 1px solid #000000;
    background: #ffffff;
    transition: all 0.1s ease;
    text-transform: uppercase;
}

.package-links a:hover {
    background: #000000;
    color: #ffffff;
}

/* Posterior Analysis Section */
.analysis-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.analysis-category {
    background: #ffffff;
    border: 2px solid #000000;
    padding: 1rem;
    position: relative;
}

.analysis-category h3 {
    font-size: 0.8rem;
    color: #000000;
    margin-bottom: 1rem;
    text-transform: uppercase;
    text-align: center;
    border-bottom: 1px solid #000000;
    padding-bottom: 0.5rem;
}

.analysis-category h3 i {
    margin-right: 0.5rem;
    color: #000000;
}

.analysis-example {
    margin-top: 2rem;
    padding: 1rem;
    background: #ffffff;
    border: 2px solid #000000;
    position: relative;
}

.analysis-example h3 {
    font-size: 0.7rem;
    color: #000000;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.analysis-example pre {
    background: #000000;
    color: #ffffff;
    border: 1px solid #000000;
    padding: 1rem;
    margin: 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.4rem;
    line-height: 1.4;
}

.analysis-example code {
    background: none;
    padding: 0;
    border: none;
    font-family: inherit;
    color: inherit;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 2px solid #000000;
    background: #ffffff;
    color: #000000;
    text-decoration: none;
    font-family: 'Press Start 2P', monospace;
    font-size: 0.5rem;
    text-transform: uppercase;
    transition: all 0.1s ease;
    cursor: pointer;
    position: relative;
}

.btn:hover {
    background: #000000;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 0px #000000;
}

.btn-primary {
    background: #000000;
    color: #ffffff;
    border-color: #000000;
}

.btn-primary:hover {
    background: #ffffff;
    color: #000000;
    box-shadow: 0 4px 0px #000000;
}

.btn-secondary {
    background: #ffffff;
    color: #000000;
    border-color: #000000;
}

.btn-secondary:hover {
    background: #000000;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 0px #000000;
}

/* Contribute section */
.contribute-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.contribute-card {
    background: #ffffff;
    border: 2px solid #000000;
    padding: 1rem;
    text-align: center;
    position: relative;
    transition: all 0.1s ease;
}

.contribute-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 0px #000000;
}

.contribute-card i {
    font-size: 1.5rem;
    color: #000000;
    margin-bottom: 0.5rem;
    display: block;
}

.contribute-card h3 {
    font-size: 0.7rem;
    color: #000000;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.contribute-card p {
    font-size: 0.5rem;
    color: #000000;
    margin-bottom: 1rem;
    line-height: 1.4;
}

/* Form styles */
.contribute-form {
    background: #ffffff;
    border: 2px solid #000000;
    padding: 2rem;
    margin: 2rem 0;
    position: relative;
}

.contribute-form h3 {
    font-size: 0.8rem;
    color: #000000;
    margin-bottom: 1rem;
    text-transform: uppercase;
    text-align: center;
}

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

.form-section label {
    display: block;
    font-size: 0.6rem;
    color: #000000;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    font-weight: bold;
}

.form-section input,
.form-section textarea,
.form-section select {
    width: 100%;
    padding: 0.5rem;
    border: 2px solid #000000;
    background: #ffffff;
    color: #000000;
    font-family: 'Press Start 2P', monospace;
    font-size: 0.5rem;
    outline: none;
}

.form-section input:focus,
.form-section textarea:focus,
.form-section select:focus {
    box-shadow: inset 0 0 0 2px #000000;
}

.form-section textarea {
    height: 100px;
    resize: vertical;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .subtitle {
        font-size: 0.6rem;
    }
    
    .nav-links {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-link {
        width: 200px;
        text-align: center;
    }
    
    .algorithms-grid {
        grid-template-columns: 1fr;
    }
    
    .packages-grid {
        grid-template-columns: 1fr;
    }
    
    .contribute-options {
        grid-template-columns: 1fr;
    }
}

/* Pixel art decorations */
.pixel-decoration {
    position: absolute;
    width: 8px;
    height: 8px;
    background: #000000;
}

.pixel-decoration:nth-child(1) { top: 10px; left: 10px; }
.pixel-decoration:nth-child(2) { top: 10px; right: 10px; }
.pixel-decoration:nth-child(3) { bottom: 10px; left: 10px; }
.pixel-decoration:nth-child(4) { bottom: 10px; right: 10px; }

/* Clean Animations */
@keyframes fadeInUp {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

.algorithm-card,
.package-card,
.contribute-card {
    animation: fadeInUp 0.3s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .row-algorithms {
        flex-direction: column;
    }
    
    .algorithm-card {
        min-width: auto;
        width: 100%;
    }
    
    .algorithm-cards-container {
        grid-template-columns: 1fr;
    }
    
    .algorithms-dropdown-container {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-link {
        border-bottom: 1px solid #e5e5e5;
        border-radius: 0;
    }
    
    .dropdown-content {
        position: relative;
        box-shadow: none;
        border: 1px solid #e5e5e5;
        margin-top: 0;
        min-width: auto;
        right: auto;
        left: 0;
    }
    
    .row-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .row-title-section {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .mcmc-logo-icon {
        width: 30px;
        height: 30px;
    }
    
    .dropdown-body {
        padding: 1.5rem;
    }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #ffffff;
    border: 1px solid #000000;
}

::-webkit-scrollbar-thumb {
    background: #000000;
    border: 1px solid #000000;
}

::-webkit-scrollbar-thumb:hover {
    background: #000000;
}