/* Inference.bio - Styles consistent with Variant Bio branding */

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

:root {
    /* Variant Bio color palette - exact match from variantbio.com */
    --color-black: #1c1c1c;
    /* Primary black - text, buttons */
    --color-turquoise: #43c9c7;
    /* Primary accent - links, hover states */
    --color-orange: #ff7265;
    /* Secondary accent - underlines, highlights */
    --color-light-turquoise: #ddf5f5;
    /* Light turquoise backgrounds */
    --color-gray-light: #e9edee;
    /* Light gray backgrounds */
    --color-gray-dark: #9e9e9e;
    /* Muted text */
    --color-white: #ffffff;
    /* White */
    --color-border: #e5e7eb;
    /* Border gray */

    /* Semantic aliases */
    --color-primary: #1c1c1c;
    --color-accent: #43c9c7;
    --color-highlight: #ff7265;
    --color-text: #1c1c1c;
    --color-text-light: #4a4a4a;
    --color-text-muted: #9e9e9e;
    --color-light: #e9edee;

    /* Typography - Titillium Web like Variant Bio */
    --font-primary: 'Titillium Web', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-heading: 'Titillium Web', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3.5rem;
    --spacing-xl: 5rem;

    /* Max widths */
    --max-width: 1200px;
    --max-width-narrow: 800px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-white);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-primary);
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
    line-height: 1.625;
}

a {
    color: inherit;
    text-decoration: none;
    border-bottom: 2px solid var(--color-turquoise);
    padding-bottom: 1px;
    transition: color 0.5s ease;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--color-black);
    border-bottom: 2px solid var(--color-turquoise);
    padding: var(--spacing-sm) var(--spacing-md);
}

.navbar-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-white);
    border-bottom: none;
}

.navbar-logo img {
    height: 36px;
    width: auto;
}

.navbar-logo .brand-name {
    color: var(--color-white);
    font-weight: 600;
}

.navbar-logo .brand-separator {
    color: var(--color-gray-dark);
    font-weight: 400;
    margin: 0 0.25rem;
}

.navbar-logo .product-name {
    color: var(--color-turquoise);
    font-weight: 700;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.navbar-nav a {
    color: var(--color-white);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
    border-bottom: none;
}

.navbar-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-turquoise);
    transition: width 0.3s ease;
}

.navbar-nav a:hover::after {
    width: 100%;
}

.navbar-nav a:hover {
    color: var(--color-turquoise);
}

.navbar-nav a.active {
    color: var(--color-turquoise);
}

.navbar-cta {
    background-color: var(--color-turquoise);
    color: var(--color-black) !important;
    padding: var(--spacing-xs) var(--spacing-sm) !important;
    border-radius: 9999px;
    font-weight: 700;
    border-bottom: none;
}

.navbar-cta:hover {
    background-color: var(--color-white);
    color: var(--color-black) !important;
}

.navbar-cta::after {
    display: none !important;
}

/* Mobile menu toggle */
.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.navbar-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-white);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    padding: calc(var(--spacing-xl) + 80px) var(--spacing-md) var(--spacing-xl);
    background-color: var(--color-black);
    color: var(--color-white);
    text-align: center;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    max-width: var(--max-width-narrow);
    margin: 0 auto;
}

.hero-content.hero-two-column {
    max-width: var(--max-width);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    text-align: left;
}

.hero-two-column .hero-text h1,
.hero-two-column .hero-text p {
    margin-left: 0;
    margin-right: 0;
}

.hero-two-column .hero-text h1 {
    font-weight: 400;
}

.hero-two-column .hero-text p {
    max-width: none;
}

.hero-video {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
    .hero-content.hero-two-column {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-two-column .hero-text {
        order: 1;
    }

    .hero-video {
        order: 2;
        margin-top: 2rem;
    }
}

.hero h1 {
    color: var(--color-white);
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.125;
}

.hero .tagline {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.hero p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

.hero a {
    border-bottom: none;
}

/* Page Header (non-home pages) - matching VB subhead + heading-two style */
.page-header {
    padding: calc(5rem + 80px) var(--spacing-md) var(--spacing-md);
    background-color: var(--color-white);
    color: var(--color-black);
    text-align: left;
}

.page-header .container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.page-header .eyebrow {
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: underline;
    text-decoration-color: var(--color-orange);
    text-decoration-thickness: 2px;
    text-underline-offset: 8px;
    color: var(--color-black);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.page-header h1 {
    color: var(--color-black);
    font-size: 2rem;
    line-height: 1.25;
    margin-top: 1rem;
    margin-bottom: 1rem;
    font-weight: 400;
}

@media (min-width: 640px) {
    .page-header h1 {
        font-size: 2.25rem;
    }
}

@media (min-width: 768px) {
    .page-header h1 {
        font-size: 3.25rem;
    }
}

.page-header .tagline {
    font-size: 1rem;
    color: var(--color-text-light);
    font-weight: 400;
    line-height: 1.625;
    max-width: 700px;
    margin-top: 1rem;
    margin-bottom: 1rem;
}

/* Hero Image (full-width image under header) */
.hero-image-section {
    padding: var(--spacing-md) 0;
    text-align: center;
}

.hero-image-section .hero-image {
    max-width: 90%;
    width: auto;
    height: auto;
    display: inline-block;
    border-radius: 8px;
}

.hero-image {
    max-width: 100%;
    max-height: 500px;
}

.hero-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    display: block;
}

/* Section Image */
.section-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
}

/* Image Caption Block */
.image-caption-block {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.image-caption-block h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.image-caption-block p {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Buttons - matching Variant Bio style */
.btn {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    border-radius: 9999px;
    cursor: pointer;
    transition: color 0.5s ease, background-color 0.5s ease;
    border: none;
    border-bottom: none;
}

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

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

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-black);
    border: none;
}

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

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

.btn-outline:hover {
    background-color: var(--color-turquoise);
    color: var(--color-black);
    border-color: var(--color-turquoise);
}

/* Sections */
.section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.section-light {
    background-color: var(--color-gray-light);
}

.section-dark {
    background-color: var(--color-black);
    color: var(--color-white);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
    color: var(--color-white);
}

.section-dark p {
    color: rgba(255, 255, 255, 0.8);
}

.section-dark a {
    color: var(--color-white);
    border-bottom-color: var(--color-turquoise);
}

.section-dark a:hover {
    color: var(--color-turquoise);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.container-narrow {
    max-width: var(--max-width-narrow);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* Eyebrow - base style */
.eyebrow {
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: underline;
    text-decoration-color: var(--color-orange);
    text-decoration-thickness: 2px;
    text-underline-offset: 8px;
    color: var(--color-black);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.section-header .eyebrow {
    text-transform: uppercase;
}

/* Feature Cards */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

a.feature-card-link {
    display: block;
    text-decoration: none;
    border-bottom: none;
    color: inherit;
    position: relative;
    overflow: hidden;
}

a.feature-card-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-turquoise);
    border-radius: 0 0 8px 8px;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

a.feature-card-link:hover::after {
    transform: scaleX(1);
}

a.feature-card-link:hover h3,
a.feature-card-link:hover h4 {
    color: var(--color-turquoise);
}

.feature-card h3 {
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
    transition: color 0.3s ease;
}

.feature-card p {
    margin-bottom: 0;
}

.feature-icon {
    width: 56px;
    height: 56px;
    min-width: 56px;
    margin-bottom: var(--spacing-sm);
    color: var(--color-turquoise);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.feature-card-icon {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

a.feature-card-icon.feature-card-link {
    display: flex;
}

.feature-card-icon .feature-icon {
    margin-bottom: 0;
}

.feature-card-icon h4 {
    margin-top: 0;
}

/* Explorer Showcase - Interactive feature list with dynamic image */
.explorer-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.explorer-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.explorer-item {
    padding: var(--spacing-sm);
    border-radius: 8px;
    border-left: 3px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.explorer-item:hover,
.explorer-item.active {
    background-color: var(--color-light-turquoise);
    border-left-color: var(--color-turquoise);
}

.explorer-item h3 {
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
    font-size: 1.25rem;
}

.explorer-item p {
    margin-bottom: 0;
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.explorer-preview {
    position: sticky;
    top: 120px;
}

.explorer-preview img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

/* Crossfade container for image cycling */
.crossfade-container {
    position: relative;
    width: 100%;
    background: transparent;
}

.crossfade-image {
    width: 100%;
    height: auto;
    transition: opacity 0.8s ease-in-out;
    opacity: 0;
    background: transparent;
}

.crossfade-image:first-child {
    position: relative;
}

.crossfade-image:last-child {
    position: absolute;
    top: 0;
    left: 0;
}

.crossfade-image.active {
    opacity: 1;
}

@media (max-width: 768px) {
    .explorer-showcase {
        grid-template-columns: 1fr;
    }

    .explorer-preview {
        position: relative;
        top: 0;
        order: -1;
        margin-bottom: var(--spacing-md);
    }
}

/* Two Column Layout */
.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.two-column.reverse {
    direction: rtl;
}

.two-column.reverse>* {
    direction: ltr;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-turquoise);
    display: block;
}

.stat-label {
    font-size: 1rem;
    color: var(--color-text-light);
}

/* Content Blocks */
.content-block {
    margin-bottom: var(--spacing-lg);
}

.content-block:last-child {
    margin-bottom: 0;
}

.content-block h3 {
    position: relative;
    padding-left: var(--spacing-sm);
    border-left: 3px solid var(--color-orange);
}

/* Highlight Box */
.highlight-box {
    background-color: var(--color-light-turquoise);
    border-left: 4px solid var(--color-turquoise);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: 0 8px 8px 0;
}

.highlight-box h4 {
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

/* Example Box */
.example-box {
    background-color: var(--color-gray-light);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: 8px;
}

.example-box h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.example-box blockquote {
    font-style: italic;
    color: var(--color-text);
    padding-left: var(--spacing-sm);
    border-left: 4px solid var(--color-border);
    margin: var(--spacing-sm) 0;
}

/* Press/News Items */
.press-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.press-item {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border-left: 4px solid var(--color-turquoise);
}

.press-item h3 {
    margin-bottom: var(--spacing-xs);
    border: none;
    padding-left: 0;
}

.press-item .date {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.press-item p {
    margin-bottom: var(--spacing-sm);
}

.press-item .links {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.press-item .links a {
    font-weight: 500;
}

/* CTA Section */
.cta-section {
    background-color: #2a2a2a;
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.cta-section h2 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

.cta-section p a {
    color: var(--color-turquoise);
    border-bottom: none;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.cta-section p a:hover {
    color: var(--color-white);
}

.cta-section a.btn {
    border-bottom: none;
}

/* Footer */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-sm);
}

.footer h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.5s ease;
    border-bottom: none;
}

.footer-links a:hover {
    color: var(--color-turquoise);
}

.footer-bottom {
    max-width: var(--max-width);
    margin: var(--spacing-md) auto 0;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
    border-bottom: none;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .hero {
        padding-top: 7rem !important;
    }

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

    .hero .tagline {
        font-size: 1.25rem;
    }

    .navbar-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-black);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 2px solid var(--color-turquoise);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .navbar-nav.active {
        display: flex;
    }

    .navbar-toggle {
        display: flex;
    }

    .two-column {
        grid-template-columns: 1fr !important;
    }

    .two-column.reverse {
        direction: ltr;
    }

    /* Make feature-card-icon cards stack vertically like Applications section on mobile */
    .feature-card-icon {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .feature-card-icon .feature-icon {
        margin-bottom: var(--spacing-sm);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-bottom {
        justify-content: center;
        text-align: center;
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    .hero {
        min-height: 60vh;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

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

.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* Lists */
.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

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

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 20px;
    background-color: var(--color-primary);
    color: var(--color-white);
}

.badge-outline {
    background-color: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
}