@font-face {
    font-family: 'Syne';
    font-style: normal;
    font-weight: 700;
    src: url('/assets/fonts/syne-v22-latin-700.woff2') format('woff2');
    font-display: swap;
}
@font-face {
    font-family: 'IBM Plex Mono';
    font-style: normal;
    font-weight: 400;
    src: url('/assets/fonts/ibm-plex-mono-v19-latin-regular.woff2') format('woff2');
    font-display: swap;
}
@font-face {
    font-family: 'Public Sans';
    font-style: normal;
    font-weight: 400;
    src: url('/assets/fonts/public-sans-v15-latin-regular.woff2') format('woff2');
    font-display: swap;
}
@font-face {
    font-family: 'Public Sans';
    font-style: normal;
    font-weight: 600;
    src: url('/assets/fonts/public-sans-v15-latin-600.woff2') format('woff2');
    font-display: swap;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
body, h1, h2, h3, p { margin: 0; }
body {
    font-family: var(--font-body);
    color: var(--token-graphite);
    background: var(--token-paper);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, .display {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}
.display { font-size: clamp(2.5rem, 5vw, 4rem); }
.h2 { font-size: clamp(2rem, 4vw, 3rem); }
.h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
.h4 { font-size: 1.25rem; }
.lead { font-size: 1.25rem; color: var(--token-slate); margin-top: var(--space-4); max-width: 65ch;}
.body-lg { font-size: 1.125rem; }
.eyebrow { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.875rem; color: var(--token-orange); margin-bottom: var(--space-3); display: block; font-weight: 600; }
.highlight { color: var(--token-orange); }

a { color: inherit; text-decoration: none; }
.nav-link[aria-current="page"] { font-weight: 600; border-bottom: 2px solid var(--token-orange); padding-bottom: 2px;}
.nav-link:hover { color: var(--token-orange); }

/* Layout */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-4); }
.narrow-container { max-width: var(--container-narrow); }
.section-padding { padding: var(--space-12) 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.text-center { text-align: center; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    font-family: var(--font-body); font-weight: 600;
    padding: 0.75rem 1.5rem; border-radius: 4px;
    cursor: pointer; transition: all 0.2s ease;
    border: 2px solid transparent;
}
.btn-primary { background: var(--token-graphite); color: var(--token-paper); }
.btn-primary:hover { background: var(--token-orange); }
.btn-secondary { background: transparent; border-color: var(--token-graphite); color: var(--token-graphite); }
.btn-secondary:hover { background: var(--token-graphite); color: var(--token-paper); }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1.125rem; }

/* Header & Footer */
.site-header { padding: var(--space-4) 0; border-bottom: 1px solid var(--token-border); background: var(--token-paper); position: sticky; top: 0; z-index: 100;}
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; }
.site-nav { display: flex; gap: var(--space-4); }

.site-footer { background: var(--token-graphite); color: var(--token-paper); padding: var(--space-8) 0 var(--space-4); margin-top: var(--space-12); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-6); }
.footer-heading { font-family: var(--font-mono); font-size: 0.875rem; text-transform: uppercase; color: var(--token-slate); margin-bottom: var(--space-3); display: block; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: var(--space-2); }
.footer-links a { color: var(--token-paper); opacity: 0.8; transition: opacity 0.2s; }
.footer-links a:hover { opacity: 1; color: var(--token-orange); }
.footer-blurb { color: var(--token-slate); margin-top: var(--space-3); max-width: 30ch; }
.footer-bottom { margin-top: var(--space-8); padding-top: var(--space-4); border-top: 1px solid rgba(255,255,255,0.1); color: var(--token-slate); font-size: 0.875rem; text-align: center;}

/* Specific Blocks */
.split-layout .container { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); align-items: center; }
.hero-actions { display: flex; gap: var(--space-3); margin-top: var(--space-6); }
.hero-metrics { display: flex; gap: var(--space-6); margin-top: var(--space-8); border-top: 1px solid var(--token-border); padding-top: var(--space-4); }
.metric-value { display: block; font-family: var(--font-display); font-size: 2rem; font-weight: 700; }
.metric-label { font-family: var(--font-mono); font-size: 0.875rem; color: var(--token-slate); }

.chart-mockup { background: white; border: 1px solid var(--token-border); border-radius: 8px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
.chart-header { display: flex; justify-content: space-between; padding: var(--space-3); border-bottom: 1px solid var(--token-border); font-family: var(--font-mono); font-size: 0.875rem; }
.badge-critical { background: rgba(255,59,48,0.1); color: var(--token-orange); padding: 0.25rem 0.5rem; border-radius: 4px; font-weight: 600; }
.chart-body { padding: var(--space-4); }
.hero-chart-svg { width: 100%; height: auto; display: block; }
.chart-annotation { font-family: var(--font-mono); font-size: 12px; }
.chart-annotation.alert { fill: var(--token-orange); font-weight: 600; }

.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--space-4); }
.card { background: white; border: 1px solid var(--token-border); padding: var(--space-4); border-radius: 8px; transition: transform 0.2s, box-shadow 0.2s; display: block; }
.card:hover { transform: translateY(-4px); box-shadow: 0 10px 20px rgba(0,0,0,0.05); border-color: var(--token-graphite); }
.card-link { font-family: var(--font-mono); font-size: 0.875rem; font-weight: 600; color: var(--token-orange); margin-top: var(--space-4); display: inline-block; }

/* Forms */
.interactive-form { background: white; padding: var(--space-6); border: 1px solid var(--token-border); border-radius: 8px; }
.form-group { margin-bottom: var(--space-4); }
.form-group label { display: block; font-weight: 600; margin-bottom: var(--space-2); }
.form-group input { width: 100%; padding: 0.75rem; border: 1px solid var(--token-border); border-radius: 4px; font-family: var(--font-body); font-size: 1rem; }
.form-group input:focus { outline: none; border-color: var(--token-graphite); box-shadow: 0 0 0 2px rgba(28,28,30,0.1); }
.help-text { display: block; font-size: 0.875rem; color: var(--token-slate); margin-top: 0.25rem; }
.result-box { padding: var(--space-4); border-left: 4px solid var(--token-mint); background: rgba(52, 199, 89, 0.05); }
.result-box.hidden { display: none; }
.result-box.anomaly { border-left-color: var(--token-orange); background: rgba(255, 59, 48, 0.05); }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; text-align: left; }
.data-table th, .data-table td { padding: var(--space-3); border-bottom: 1px solid var(--token-border); }
.data-table th { font-family: var(--font-mono); font-size: 0.875rem; text-transform: uppercase; color: var(--token-slate); }

.alert { padding: var(--space-4); border-radius: 4px; margin-bottom: var(--space-4); }
.alert-warning { background: #FFF3CD; color: #856404; border: 1px solid #FFEEBA; }

@media (max-width: 768px) {
    .split-layout .container { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; }
    .site-nav { display: none; /* simple mobile fallback for now */ }
    .footer-grid { grid-template-columns: 1fr; }
}