/* Design System Tokens */
:root {
    --color-primary: #1F1F1F;
    /* Rich Espresso */
    --color-bg: #F7F3F0;
    /* Soft Crema */
    --color-accent: #E2D1C3;
    /* Muted Champagne */
    --color-white: #FFFFFF;
    --color-gray: #7F7F7F;

    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --container-width: 1200px;
    --transition: all 0.3s ease;
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header & Nav */
.site-header {
    padding: var(--spacing-md) 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    background: rgba(247, 243, 240, 0.8);
    backdrop-filter: blur(10px);
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    height: 36px;
    width: auto;
    object-fit: contain;
}

.logo span {
    font-family: var(--font-sans);
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-primary);
}

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-links a:hover {
    color: var(--color-gray);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: #333;
}

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

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

.btn-text {
    padding: 1rem 0;
    font-size: 0.9rem;
    text-transform: none;
    border-bottom: 1px solid transparent;
}

.btn-text:hover {
    border-bottom-color: var(--color-primary);
}

/* Hero & Page Layouts */
.hero-section {
    padding: 12rem 0 var(--spacing-xl);
    min-height: 80vh;
    display: flex;
    align-items: center;
    background-color: var(--color-bg);
}

.hero-content {
    max-width: 900px;
}

.hero-content h1 {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.15;
    font-weight: 400;
    margin: var(--spacing-sm) 0 var(--spacing-md);
}

.hero-content p {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--color-gray);
    max-width: 700px;
    margin-bottom: var(--spacing-lg);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

.inner-page {
    padding-top: 8rem;
}

.page-content {
    padding: var(--spacing-lg) 0;
}

/* Common Section Header */
.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-family: var(--font-serif);
    font-size: 3rem;
    line-height: 1.2;
    font-weight: 400;
}

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

.align-center p {
    margin: var(--spacing-sm) auto;
    max-width: 600px;
}

/* Ecosystem Section */
.ecosystem-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-white);
}

.channels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.channel-card {
    padding: var(--spacing-lg);
    background-color: var(--color-bg);
    border-radius: 4px;
    transition: var(--transition);
}

.channel-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.channel-card h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.channel-card p {
    font-size: 0.95rem;
    color: var(--color-gray);
}

/* Infrastructure Section */
.infrastructure-section {
    padding: var(--spacing-xl) 0;
}

.split-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.infra-text p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.infra-list {
    margin-top: var(--spacing-md);
}

.infra-list li {
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
    position: relative;
    padding-left: 1.5rem;
}

.infra-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-size: 1.5rem;
    line-height: 1;
}

.abstract-box {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--color-accent) 0%, #D8C4B6 100%);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.abstract-box::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Portfolio Section */
.portfolio-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-white);
}

/* Partnership Section */
.partnership-section {
    padding: var(--spacing-xl) 0;
}

.cta-card {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl);
    text-align: center;
    border-radius: 4px;
}

.cta-card h2 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.cta-card p {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    opacity: 0.8;
}

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

.cta-card .btn-primary:hover {
    background-color: var(--color-accent);
}

/* Footer Refinement */
.site-footer {
    padding: var(--spacing-xl) 0 var(--spacing-md);
    background-color: #1A1A1A;
    color: var(--color-white);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--color-gray);
}

.footer-links h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

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

.footer-links ul li a {
    font-size: 0.9rem;
    color: var(--color-gray);
}

.footer-links ul li a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid #333;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--color-gray);
}

.legal-links {
    display: flex;
    gap: var(--spacing-md);
}

/* Blog & Intelligence */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.blog-card {
    background-color: var(--color-bg);
    border: 1px solid transparent;
    transition: var(--transition);
}

.blog-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
}

.card-content {
    padding: var(--spacing-lg);
}

.category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-gray);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.blog-card h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.blog-card p {
    font-size: 0.95rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-lg);
}

.read-more {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Scroll Animation Hooks */
.fade-ready {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease, transform 1s ease;
}

.fade-ready.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards;
}

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

/* Responsive */
@media (max-width: 768px) {
    .split-content {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
        /* Mobile menu needed */
    }

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