@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

:root {
    --c-bg: #F7F7F9;
    --c-bg-alt: #FFFFFF;
    --c-bg-dark: #07090F;
    --c-text: #12141D;
    --c-text-muted: #5A5D6B;
    --c-text-light: #F7F7F9;
    --c-accent: #0044FF;
    --c-accent-hover: #0033CC;
    --c-border: #E5E7EB;
    --c-border-dark: #1F2233;
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --nav-height: 80px;
    --container-padding: 5%;
    --section-padding: clamp(60px, 10vw, 140px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-body);
    background-color: var(--c-bg);
    color: var(--c-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 600; line-height: 1.1; color: var(--c-text); }
.dark-section h1, .dark-section h2, .dark-section h3, .dark-section h4 { color: var(--c-text-light); }
p { margin-bottom: 1rem; }
a { color: var(--c-accent); text-decoration: none; transition: all 0.3s ease; }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1400px; margin: 0 auto; padding: 0 var(--container-padding); }
.grid { display: grid; gap: 2rem; }

/* Grid Background Pattern */
.bg-grid {
    background-size: 50px 50px;
    background-image: 
        linear-gradient(to right, rgba(0,0,0,0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0,0,0,0.03) 1px, transparent 1px);
}
.dark-section.bg-grid {
    background-image: 
        linear-gradient(to right, rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.03) 1px, transparent 1px);
}

/* Header & Nav */
.header {
    position: fixed; top: 0; left: 0; width: 100%; height: var(--nav-height);
    background: rgba(247, 247, 249, 0.85); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--c-border); z-index: 1000;
    transition: background 0.3s, border-color 0.3s;
}
.header.dark-mode {
    background: rgba(7, 9, 15, 0.85); border-bottom-color: var(--c-border-dark);
}
.header-inner { display: flex; justify-content: space-between; align-items: center; height: 100%; }
.logo { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; color: var(--c-text); }
.header.dark-mode .logo { color: var(--c-text-light); }
.logo span { color: var(--c-accent); }

.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
    font-size: 0.95rem; font-weight: 500; color: var(--c-text);
    position: relative; padding: 0.5rem 0;
}
.header.dark-mode .nav-links a { color: var(--c-text-light); }
.nav-links a::after {
    content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
    background: var(--c-accent); transition: width 0.3s ease;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--c-text); margin: 5px 0; transition: 0.3s; }
.header.dark-mode .menu-toggle span { background: var(--c-text-light); }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 1rem 2rem; font-family: var(--font-heading); font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.05em; font-size: 0.85rem;
    border-radius: 0; transition: all 0.3s ease; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--c-accent); color: #fff; }
.btn-primary:hover { background: var(--c-accent-hover); transform: translateY(-2px); box-shadow: 0 10px 20px rgba(0,68,255,0.2); }
.btn-outline { background: transparent; border-color: var(--c-text); color: var(--c-text); }
.btn-outline:hover { background: var(--c-text); color: var(--c-bg); }
.dark-section .btn-outline { border-color: var(--c-text-light); color: var(--c-text-light); }
.dark-section .btn-outline:hover { background: var(--c-text-light); color: var(--c-bg-dark); }

/* Typography & Layout Utils */
.section { padding: var(--section-padding) 0; }
.dark-section { background-color: var(--c-bg-dark); color: var(--c-text-light); }
.dark-section p { color: #A0A3B5; }

.section-label {
    font-family: var(--font-heading); font-size: 0.85rem; text-transform: uppercase;
    letter-spacing: 0.1em; color: var(--c-accent); margin-bottom: 1.5rem; display: block;
}
.section-title { font-size: clamp(2rem, 4vw, 3.5rem); margin-bottom: 2rem; max-width: 800px; }
.section-desc { font-size: 1.125rem; color: var(--c-text-muted); max-width: 600px; margin-bottom: 3rem; }

/* Matrix Layout (Analytical feel) */
.matrix-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1px; background: var(--c-border); border: 1px solid var(--c-border); }
.dark-section .matrix-grid { background: var(--c-border-dark); border-color: var(--c-border-dark); }
.matrix-cell { background: var(--c-bg-alt); padding: 3rem; transition: background 0.3s; }
.dark-section .matrix-cell { background: var(--c-bg-dark); }
.matrix-cell:hover { background: var(--c-bg); }
.dark-section .matrix-cell:hover { background: #0c101a; }
.matrix-cell h3 { font-size: 1.5rem; margin-bottom: 1rem; }
.matrix-cell-number { font-family: var(--font-heading); font-size: 1rem; color: var(--c-text-muted); margin-bottom: 1.5rem; display: block; }

/* Ticker */
.ticker-wrap { width: 100%; overflow: hidden; background: var(--c-bg-dark); color: var(--c-text-light); padding: 0.75rem 0; font-family: var(--font-heading); font-size: 0.85rem; letter-spacing: 0.05em; border-bottom: 1px solid var(--c-border-dark); }
.ticker { display: flex; white-space: nowrap; animation: ticker 40s linear infinite; }
.ticker-item { padding: 0 2rem; display: inline-flex; align-items: center; }
.ticker-item::after { content: '•'; margin-left: 4rem; color: var(--c-accent); }
@keyframes ticker { 0% { transform: translate3d(0, 0, 0); } 100% { transform: translate3d(-50%, 0, 0); } }

/* Hero Specific */
.hero { min-height: 100vh; display: flex; align-items: center; padding-top: var(--nav-height); position: relative; }
.hero-content { max-width: 900px; position: relative; z-index: 2; }
.hero h1 { font-size: clamp(3rem, 6vw, 5.5rem); letter-spacing: -0.03em; margin-bottom: 1.5rem; }
.hero-lead { font-size: clamp(1.2rem, 2vw, 1.5rem); color: var(--c-text-muted); margin-bottom: 2.5rem; max-width: 700px; }
.hero-visual { position: absolute; right: 0; top: 0; width: 50%; height: 100%; overflow: hidden; z-index: 1; opacity: 0.2; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.hero-visual::after { content: ''; position: absolute; top:0; left:0; right:0; bottom:0; background: linear-gradient(to right, var(--c-bg), transparent); }

/* Footer */
.footer { background: var(--c-bg-dark); color: var(--c-text-light); padding: 5rem 0 2rem; border-top: 1px solid var(--c-border-dark); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 4rem; margin-bottom: 4rem; }
.footer-logo { font-family: var(--font-heading); font-size: 2rem; font-weight: 700; margin-bottom: 1rem; display: block; color: #fff; }
.footer-logo span { color: var(--c-accent); }
.footer h4 { color: #fff; margin-bottom: 1.5rem; font-size: 1rem; text-transform: uppercase; letter-spacing: 0.05em; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 0.75rem; }
.footer a { color: #A0A3B5; font-size: 0.95rem; }
.footer a:hover { color: var(--c-accent); }
.footer-bottom { border-top: 1px solid var(--c-border-dark); padding-top: 2rem; display: flex; justify-content: space-between; color: #666; font-size: 0.85rem; }

/* Responsive */
@media (max-width: 992px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-visual { display: none; }
}
@media (max-width: 768px) {
    .menu-toggle { display: block; }
    .nav-links {
        position: fixed; top: var(--nav-height); left: 0; width: 100%; height: calc(100vh - var(--nav-height));
        background: var(--c-bg); flex-direction: column; align-items: center; justify-content: center; gap: 2rem;
        transform: translateX(100%); transition: transform 0.3s ease;
    }
    .header.dark-mode .nav-links { background: var(--c-bg-dark); }
    .nav-links.active { transform: translateX(0); }
    .nav-links a { font-size: 1.25rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
    
    .matrix-grid { border-width: 1px 0 0 0; }
    .matrix-cell { padding: 2rem; }
}

/* Article Cards */
.article-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; }
.article-card { display: flex; flex-direction: column; background: var(--c-bg-alt); border: 1px solid var(--c-border); transition: transform 0.3s; }
.article-card:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(0,0,0,0.05); }
.article-img { width: 100%; height: 240px; object-fit: cover; border-bottom: 1px solid var(--c-border); }
.article-content { padding: 2rem; flex-grow: 1; display: flex; flex-direction: column; }
.article-meta { font-size: 0.85rem; color: var(--c-text-muted); margin-bottom: 1rem; display: flex; justify-content: space-between; }
.article-content h3 { font-size: 1.25rem; margin-bottom: 1rem; }
.article-content p { color: var(--c-text-muted); margin-bottom: 1.5rem; flex-grow: 1; }
.article-link { display: inline-flex; align-items: center; font-weight: 600; font-family: var(--font-heading); font-size: 0.85rem; text-transform: uppercase; }
.article-link::after { content: '→'; margin-left: 0.5rem; transition: transform 0.3s; }
.article-card:hover .article-link::after { transform: translateX(5px); }

.dark-section .article-card { background: var(--c-bg-dark); border-color: var(--c-border-dark); }
.dark-section .article-img { border-color: var(--c-border-dark); }
.dark-section .article-content p { color: #A0A3B5; }

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; font-family: var(--font-heading); font-size: 0.85rem; font-weight: 600; margin-bottom: 0.5rem; text-transform: uppercase; letter-spacing: 0.05em; }
.form-control { width: 100%; padding: 1rem; background: transparent; border: 1px solid var(--c-border); font-family: var(--font-body); font-size: 1rem; color: var(--c-text); transition: border-color 0.3s; }
.form-control:focus { outline: none; border-color: var(--c-accent); }
.dark-section .form-control { border-color: var(--c-border-dark); color: var(--c-text-light); }
.dark-section .form-control:focus { border-color: var(--c-accent); }
textarea.form-control { resize: vertical; min-height: 120px; }

/* Table */
.data-table { width: 100%; border-collapse: collapse; margin: 2rem 0; font-size: 0.95rem; }
.data-table th, .data-table td { padding: 1rem; border-bottom: 1px solid var(--c-border); text-align: left; }
.data-table th { font-family: var(--font-heading); font-weight: 600; color: var(--c-text-muted); text-transform: uppercase; font-size: 0.85rem; letter-spacing: 0.05em; }
.dark-section .data-table th, .dark-section .data-table td { border-color: var(--c-border-dark); }

/* Utility */
.mb-1 { margin-bottom: 1rem; } .mb-2 { margin-bottom: 2rem; } .mb-3 { margin-bottom: 3rem; } .mb-4 { margin-bottom: 4rem; }
.text-center { text-align: center; }

/* Additional specific niche components */
.stat-block { padding: 2rem 0; border-top: 1px solid var(--c-border); display: flex; gap: 4rem; flex-wrap: wrap; }
.stat-item h4 { font-size: 3rem; color: var(--c-accent); margin-bottom: 0.5rem; font-weight: 400; }
.stat-item p { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; font-family: var(--font-heading); font-weight: 600; }

.methodology-steps { position: relative; padding-left: 2rem; border-left: 1px solid var(--c-border); margin: 3rem 0; }
.dark-section .methodology-steps { border-color: var(--c-border-dark); }
.step-item { position: relative; padding-bottom: 3rem; }
.step-item::before { content: ''; position: absolute; left: -2.3rem; top: 0; width: 10px; height: 10px; background: var(--c-accent); border-radius: 50%; }
.step-title { font-size: 1.25rem; margin-bottom: 1rem; color: var(--c-text); }
.dark-section .step-title { color: var(--c-text-light); }

.content-block { max-width: 800px; margin: 0 auto; font-size: 1.1rem; }
.content-block h2 { font-size: 2rem; margin: 3rem 0 1.5rem; }
.content-block h3 { font-size: 1.5rem; margin: 2rem 0 1rem; }
.content-block ul { margin-bottom: 1.5rem; padding-left: 1.5rem; }
.content-block li { margin-bottom: 0.5rem; }