/* ==========================================================================
   Kelxar Design System
   Minimal, refined, calm, confident
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Color palette */
    --color-bg-deep: #08080a;
    --color-bg-base: #0a0a0c;
    --color-bg-elevated: #111118;
    --color-bg-surface: #18181b;
    --color-bg-hover: #1f1f23;

    --color-border: #27272a;
    --color-border-subtle: #1f1f23;

    --color-text-primary: #f4f4f5;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-text-faint: #52525b;

    /* Accent - subtle warm gray with hint of warmth */
    --color-accent: #d4d4d8;
    --color-accent-muted: #a1a1aa;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;

    /* Font sizes - fluid typography */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Layout */
    --max-width: 1200px;
    --max-width-narrow: 800px;
    --max-width-prose: 65ch;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

/* Force dark mode regardless of system preference */
html {
    color-scheme: dark;
    background-color: var(--color-bg-deep);
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-base);
    min-height: 100vh;
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--text-4xl);
    font-weight: 400;
}

h2 {
    font-size: var(--text-2xl);
}

h3 {
    font-size: var(--text-xl);
}

h4 {
    font-size: var(--text-lg);
}

p {
    color: var(--color-text-secondary);
}

.lead {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.mono {
    font-family: var(--font-mono);
}

.label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
}

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

.text-faint {
    color: var(--color-text-faint);
}

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

a:hover {
    color: var(--color-text-secondary);
}

.link-subtle {
    color: var(--color-text-secondary);
}

.link-subtle:hover {
    color: var(--color-text-primary);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

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

.section {
    padding: var(--space-24) 0;
}

.section-sm {
    padding: var(--space-16) 0;
}

.section-lg {
    padding: var(--space-32) 0;
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 12, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-subtle);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.logo svg, .logo img {
    height: 44px;
    width: auto;
}

.footer-brand .logo svg,
.footer-brand .logo img {
    height: 56px;
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-desktop a {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    padding: var(--space-2);
    cursor: pointer;
}

.nav-mobile {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    height: calc(100vh - 72px);
    height: calc(100dvh - 72px);
    background: #0a0a0c;
    padding: var(--space-8) var(--space-6);
    flex-direction: column;
    gap: var(--space-6);
    z-index: 1000;
}

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

/* Prevent body scroll when mobile menu is open */
body.nav-open {
    overflow: hidden;
}

.nav-mobile a {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border-subtle);
}

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

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 72px;
    background: radial-gradient(ellipse at center, var(--color-bg-elevated) 0%, var(--color-bg-deep) 100%);
}

/* Reduce hero padding when AI section is above it */
.ai-section + main .hero,
.ai-section ~ main .hero {
    padding-top: var(--space-8);
    min-height: auto;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    margin-bottom: var(--space-6);
}

.hero .lead {
    margin-bottom: var(--space-10);
    max-width: 600px;
}

.hero-page {
    min-height: 50vh;
    padding-top: calc(72px + var(--space-16));
    padding-bottom: var(--space-16);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-text-primary);
    color: var(--color-bg-base);
    border-color: var(--color-text-primary);
}

.btn-primary:hover {
    background: var(--color-text-secondary);
    border-color: var(--color-text-secondary);
    color: var(--color-bg-base);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-text-muted);
    color: var(--color-text-primary);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
    padding: var(--space-2) var(--space-4);
}

.btn-ghost:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-hover);
}

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--color-border);
    background: var(--color-bg-hover);
}

.card-link {
    display: block;
    text-decoration: none;
}

.card h3 {
    margin-bottom: var(--space-3);
}

.card p {
    margin-bottom: var(--space-4);
}

.card .label {
    margin-bottom: var(--space-4);
    display: block;
}

/* --------------------------------------------------------------------------
   Grid
   -------------------------------------------------------------------------- */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* --------------------------------------------------------------------------
   Services List
   -------------------------------------------------------------------------- */
.service-item {
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-border-subtle);
}

.service-item:first-child {
    border-top: 1px solid var(--color-border-subtle);
}

.service-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-6);
    margin-bottom: var(--space-4);
}

.service-number {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-faint);
}

.service-content ul {
    list-style: none;
    margin-top: var(--space-6);
}

.service-content li {
    position: relative;
    padding-left: var(--space-6);
    margin-bottom: var(--space-3);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.service-content li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 1px;
    background: var(--color-text-faint);
}

/* --------------------------------------------------------------------------
   Case Studies / Work
   -------------------------------------------------------------------------- */
.case-study-card {
    display: block;
    padding: var(--space-10);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-base);
}

.case-study-card:hover {
    border-color: var(--color-border);
    transform: translateY(-2px);
}

.case-study-card .label {
    margin-bottom: var(--space-4);
}

.case-study-card h3 {
    margin-bottom: var(--space-4);
    font-size: var(--text-xl);
}

.case-study-card p {
    margin-bottom: var(--space-6);
}

.case-study-card .read-more {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.case-study-card:hover .read-more {
    color: var(--color-text-primary);
}

/* --------------------------------------------------------------------------
   Case Study Detail
   -------------------------------------------------------------------------- */
.case-study-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    padding: var(--space-6) 0;
    border-top: 1px solid var(--color-border-subtle);
    border-bottom: 1px solid var(--color-border-subtle);
    margin-bottom: var(--space-10);
}

.meta-item {
    flex: 1;
    min-width: 150px;
}

.meta-item .label {
    display: block;
    margin-bottom: var(--space-2);
}

.meta-item span {
    color: var(--color-text-primary);
    font-size: var(--text-sm);
}

/* --------------------------------------------------------------------------
   Prose Content
   -------------------------------------------------------------------------- */
.prose {
    max-width: var(--max-width-prose);
}

.prose h2 {
    margin-top: var(--space-12);
    margin-bottom: var(--space-4);
}

.prose h3 {
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
}

.prose p {
    margin-bottom: var(--space-6);
}

.prose ul, .prose ol {
    margin-bottom: var(--space-6);
    padding-left: var(--space-6);
}

.prose li {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.prose strong {
    color: var(--color-text-primary);
    font-weight: 500;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    padding: var(--space-16) 0;
    border-top: 1px solid var(--color-border-subtle);
    background: var(--color-bg-deep);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-8);
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: var(--space-4);
}

.footer-brand p {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.footer-nav {
    display: flex;
    gap: var(--space-16);
}

.footer-nav-section h4 {
    font-size: var(--text-sm);
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.footer-nav-section ul {
    list-style: none;
}

.footer-nav-section li {
    margin-bottom: var(--space-2);
}

.footer-nav-section a {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.footer-nav-section a:hover {
    color: var(--color-text-primary);
}

.footer-bottom {
    margin-top: var(--space-12);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    font-size: var(--text-sm);
    color: var(--color-text-faint);
}

/* --------------------------------------------------------------------------
   Contact Form
   -------------------------------------------------------------------------- */
.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-text-muted);
    background: var(--color-bg-hover);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* --------------------------------------------------------------------------
   Insights / Blog
   -------------------------------------------------------------------------- */
.insight-card {
    display: block;
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border-subtle);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.insight-card:first-child {
    border-top: 1px solid var(--color-border-subtle);
}

.insight-card:hover {
    background: var(--color-bg-hover);
}

.insight-card time {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
    display: block;
    margin-bottom: var(--space-2);
}

.insight-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
}

.insight-card p {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Empty State
   -------------------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-6);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
}

.empty-state p {
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
html {
    scroll-behavior: smooth;
}

/* Fade in and slide up animation */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered children animation */
.animate-stagger > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.animate-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.animate-stagger.is-visible > *:nth-child(2) { transition-delay: 100ms; }
.animate-stagger.is-visible > *:nth-child(3) { transition-delay: 200ms; }
.animate-stagger.is-visible > *:nth-child(4) { transition-delay: 300ms; }
.animate-stagger.is-visible > *:nth-child(5) { transition-delay: 400ms; }
.animate-stagger.is-visible > *:nth-child(6) { transition-delay: 500ms; }

.animate-stagger.is-visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* Fade in only (no movement) */
.animate-fade {
    opacity: 0;
    transition: opacity 0.8s ease-out;
}

.animate-fade.is-visible {
    opacity: 1;
}

/* Slide in from left */
.animate-slide-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-slide-left.is-visible {
    opacity: 1;
    transform: translateX(0);
}

/* Scale up subtle */
.animate-scale {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-scale.is-visible {
    opacity: 1;
    transform: scale(1);
}

/* Hero animations - always visible but with entrance */
.hero-content {
    animation: heroFadeIn 1s ease-out forwards;
}

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

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .animate-on-scroll,
    .animate-stagger > *,
    .animate-fade,
    .animate-slide-left,
    .animate-scale {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .hero-content {
        animation: none;
    }
}

/* --------------------------------------------------------------------------
   Image Containers
   -------------------------------------------------------------------------- */
.img-placeholder {
    background: var(--color-bg-elevated);
    border: 1px dashed var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-faint);
    font-size: var(--text-sm);
    overflow: hidden;
}

.img-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Hero with background image */
.hero-with-image {
    position: relative;
}

.hero-bg-image {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    opacity: 0.4;
    pointer-events: none;
}

.hero-bg-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: left center;
    mask-image: linear-gradient(to right, transparent, black 30%);
    -webkit-mask-image: linear-gradient(to right, transparent, black 30%);
}

/* Case study card images */
.case-study-card-image {
    width: 100%;
    height: 200px;
    margin-bottom: var(--space-6);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.case-study-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.case-study-card:hover .case-study-card-image img {
    transform: scale(1.03);
}

/* Case study detail hero image */
.case-study-hero-image {
    width: 100%;
    height: 300px;
    margin-top: var(--space-8);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.case-study-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Service section images */
.service-image {
    width: 100%;
    max-width: 600px;
    height: 300px;
    margin-top: var(--space-8);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* About page image */
.about-image {
    width: 100%;
    height: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin: var(--space-10) 0;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Contact page accent image */
.contact-accent-image {
    width: 100%;
    height: 100%;
    min-height: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.contact-accent-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Insight card image */
.insight-card-image {
    width: 100%;
    height: 150px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--space-4);
}

.insight-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (max-width: 768px) {
    .hero-bg-image {
        display: none;
    }

    .case-study-card-image {
        height: 150px;
    }

    .case-study-hero-image {
        height: 200px;
    }

    .service-image {
        height: 200px;
    }

    .about-image {
        height: 250px;
    }
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-10 { margin-top: var(--space-10); }
.mt-12 { margin-top: var(--space-12); }

.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-10 { margin-bottom: var(--space-10); }
.mb-12 { margin-bottom: var(--space-12); }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-nav {
        gap: var(--space-8);
    }
}

@media (max-width: 768px) {
    :root {
        --text-4xl: 2rem;
        --text-3xl: 1.5rem;
        --text-2xl: 1.25rem;
    }

    .nav-desktop {
        display: none;
    }

    .nav-mobile-toggle {
        display: block;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        flex-direction: column;
    }

    .footer-nav {
        flex-direction: column;
        gap: var(--space-8);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .hero {
        min-height: auto;
        padding-top: calc(72px + var(--space-12));
        padding-bottom: var(--space-12);
    }

    .section {
        padding: var(--space-16) 0;
    }

    .section-lg {
        padding: var(--space-20) 0;
    }

    .case-study-card {
        padding: var(--space-6);
    }

    .service-header {
        flex-direction: column;
        gap: var(--space-2);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }

    .btn-group {
        flex-direction: column;
    }

    .btn-group .btn {
        width: 100%;
    }
}

/* --------------------------------------------------------------------------
   AI Personalization Inline Section
   Futuristic, inline with page flow, staged loading states
   -------------------------------------------------------------------------- */

/* Container - inline element in page flow */
.ai-section {
    background: linear-gradient(180deg,
        var(--color-bg-elevated) 0%,
        var(--color-bg-base) 100%);
    border-bottom: 1px solid var(--color-border-subtle);
    overflow: hidden;
}

.ai-section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
}

/* Header with status indicator */
.ai-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.ai-section-status {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.ai-section-indicator {
    width: 8px;
    height: 8px;
    background: #d4a574;
    border-radius: 50%;
    animation: indicatorPulse 1.5s ease-in-out infinite;
}

@keyframes indicatorPulse {
    0%, 100% { opacity: 0.4; box-shadow: 0 0 0 0 rgba(212, 165, 116, 0.4); }
    50% { opacity: 1; box-shadow: 0 0 0 4px rgba(212, 165, 116, 0); }
}

.ai-section-label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #d4a574;
}

.ai-section-meta {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.ai-section-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.ai-section-close {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: var(--text-base);
}

.ai-section-close:hover {
    border-color: var(--color-text-muted);
    color: var(--color-text-primary);
}

/* Staged loading states */
.ai-section-stages {
    margin-bottom: var(--space-6);
}

.ai-stage {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) 0;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    opacity: 0.4;
    transition: opacity 0.3s ease, color 0.3s ease;
}

.ai-stage.is-active {
    opacity: 1;
    color: #d4a574;
}

.ai-stage.is-complete {
    opacity: 0.6;
    color: var(--color-text-secondary);
}

.ai-stage-icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
}

.ai-stage.is-active .ai-stage-icon::after {
    content: '';
    width: 6px;
    height: 6px;
    background: #d4a574;
    border-radius: 50%;
    animation: stagePulse 0.8s ease-in-out infinite;
}

@keyframes stagePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

.ai-stage.is-complete .ai-stage-icon::after {
    content: '✓';
    color: var(--color-text-secondary);
}

/* Content area */
.ai-section-content {
    font-size: var(--text-base);
    line-height: 1.8;
    color: var(--color-text-secondary);
    max-width: var(--max-width-prose);
    min-height: 100px;
}

.ai-section-content p {
    margin-bottom: var(--space-4);
}

.ai-section-content p:last-of-type {
    margin-bottom: 0;
}

.ai-section-content strong {
    color: var(--color-text-primary);
    font-weight: 500;
}

/* Typing cursor */
.ai-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: #d4a574;
    margin-left: 1px;
    animation: cursorBlink 0.8s step-end infinite;
    vertical-align: text-bottom;
}

@keyframes cursorBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* CTA row */
.ai-section-cta {
    display: none;
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border-subtle);
    gap: var(--space-4);
    flex-wrap: wrap;
}

.ai-section-cta.is-visible {
    display: flex;
}

.ai-section-btn {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    padding: var(--space-3) var(--space-5);
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.ai-section-btn:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-text-muted);
}

.ai-section-btn-primary {
    background: #d4a574;
    border-color: #d4a574;
    color: var(--color-bg-base);
}

.ai-section-btn-primary:hover {
    background: #c4956a;
    border-color: #c4956a;
}

/* Anthropic visitor styling */
.ai-section.is-anthropic {
    background: linear-gradient(180deg,
        rgba(212, 165, 116, 0.08) 0%,
        var(--color-bg-base) 100%);
    border-bottom-color: rgba(212, 165, 116, 0.2);
}

.ai-section.is-anthropic .ai-section-indicator {
    background: #d4a574;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .ai-section-inner {
        padding: var(--space-6) var(--space-4);
    }

    .ai-section-header {
        flex-wrap: wrap;
        gap: var(--space-3);
    }

    .ai-section-meta {
        width: 100%;
        order: 3;
        margin-top: var(--space-2);
    }

    .ai-section-content {
        font-size: var(--text-sm);
    }

    .ai-section-cta {
        flex-direction: column;
    }

    .ai-section-btn {
        text-align: center;
        width: 100%;
    }

    .ai-stage {
        font-size: var(--text-xs);
    }
}