:root {
    /* Color System */
    --erica-blue: oklch(45% 0.13 250);
    --erica-blue-deep: oklch(35% 0.10 250);
    --erica-blue-soft: oklch(92% 0.02 250);
    --erica-silver: oklch(85% 0.01 250);
    
    --erica-mint: oklch(85% 0.12 170);
    --erica-coral: oklch(75% 0.15 25);
    --erica-orange: oklch(70% 0.18 50);
    --erica-gold: oklch(80% 0.12 85);
    --erica-green: oklch(75% 0.15 145);
    
    --success: var(--erica-green);
    --warning: var(--erica-orange);
    --error: var(--erica-coral);
    
    /* Canvas & Surface */
    --bg-canvas: oklch(98.5% 0.012 238);
    --erica-surface-muted: rgba(255, 255, 255, 0.68);
    --erica-surface: rgba(255, 255, 255, 0.76);
    --erica-surface-strong: rgba(255, 255, 255, 0.86);
    --backdrop-blur: blur(18px);
    
    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 32px;
    --space-8: 40px;
    --space-section: 80px;
    
    /* Radius */
    --radius: 22px;
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-pill: 999px;
    
    /* Elevation */
    --shadow-card: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.03);
    
    /* Layout */
    --container-max: 1200px;
    --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    background-color: var(--bg-canvas);
    color: oklch(25% 0.02 250);
    line-height: 1.55;
    word-break: keep-all;
    background-image: 
        radial-gradient(circle at 10% 10%, oklch(92% 0.04 250 / 0.4) 0%, transparent 40%),
        radial-gradient(circle at 90% 90%, oklch(92% 0.06 170 / 0.3) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, oklch(92% 0.05 50 / 0.2) 0%, transparent 50%),
        linear-gradient(to right, rgba(0,0,0,0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0,0,0,0.02) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 100% 100%, 44px 44px, 44px 44px;
    background-attachment: fixed;
    min-height: 100vh;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

header {
    padding: var(--space-7) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--erica-blue);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
}

footer {
    padding: var(--space-8) 0;
    margin-top: var(--space-section);
    border-top: 1px solid rgba(0,0,0,0.05);
    text-align: center;
    font-size: 0.9rem;
    color: oklch(50% 0.01 250);
}

.nav-links {
    display: flex;
    gap: var(--space-6);
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: oklch(40% 0.02 250);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--erica-blue);
}

.glass-card {
    background: var(--erica-surface);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius);
    padding: var(--space-6);
    box-shadow: var(--shadow-card);
}

.glass-card.strong { background: var(--erica-surface-strong); }
.glass-card.muted { background: var(--erica-surface-muted); }

.section-title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--erica-blue) 0%, var(--erica-mint) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.pill {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-4);
    background: var(--erica-blue-soft);
    color: var(--erica-blue-deep);
    border-radius: var(--radius-pill);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.evidence-card {
    border-left: 4px solid var(--erica-blue);
    padding: var(--space-3);
    background: rgba(255, 255, 255, 0.3);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: 0.9rem;
    margin-top: var(--space-4);
}

/* Case Study Table */
.case-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 var(--space-3);
    margin-top: var(--space-6);
}

.case-table th {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.6;
}

.case-row {
    background: var(--erica-surface-strong);
    backdrop-filter: var(--backdrop-blur);
    border-radius: var(--radius-md);
}

.case-row td {
    padding: var(--space-5) var(--space-4);
}

.case-row td:first-child { border-radius: var(--radius-md) 0 0 var(--radius-md); }
.case-row td:last-child { border-radius: 0 var(--radius-md) var(--radius-md) 0; }

.status-badge {
    display: inline-flex;
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 800;
}
.status-pass { background: oklch(90% 0.1 145); color: oklch(40% 0.15 145); }

.code-block {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    background: oklch(20% 0.02 250 / 0.05);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    display: block;
    margin-top: var(--space-2);
    color: oklch(15% 0.02 250);
    line-height: 1.45;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeIn 0.6s ease-out forwards;
}
ransform: translateY(0); }
}

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