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

:root {
    --white: #FFFFFF;
    --black: #000000;
    --dark-gray: #333333;
    --mid-gray: #666666;
    --light-gray: #999999;
    --border-gray: #E0E0E0;
    --bg-gray: #F5F5F5;
    --signal-red: #CC0000;
}

body {
    background-color: var(--white);
    color: var(--black);
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 400;
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Page Grid */
.page-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 80px;
    position: relative;
}

/* Grid Overlay */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1200px;
    height: 100vh;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
    padding: 0 80px;
    pointer-events: none;
    z-index: 50;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.grid-overlay.visible .grid-col {
    background-color: rgba(204, 0, 0, 0.05);
}

.grid-col {
    height: 100%;
}

/* Header */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 40px 0 24px;
    border-bottom: 1px solid var(--black);
}

.brand {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: 20px;
    letter-spacing: 0.04em;
    color: var(--black);
}

.header-nav {
    display: flex;
    gap: 24px;
}

.filter-item {
    font-family: 'Space Mono', monospace;
    font-size: 12px;
    color: var(--light-gray);
    cursor: pointer;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.filter-item:hover {
    color: var(--black);
}

.filter-item.active {
    color: var(--black);
}

.red-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--signal-red);
    flex-shrink: 0;
}

/* Scale Ruler */
.scale-ruler {
    display: flex;
    height: 4px;
    margin: 0;
    gap: 2px;
}

.ruler-segment {
    height: 100%;
    background-color: var(--border-gray);
    width: 0;
    transition: width 0.4s ease;
}

.ruler-segment.animated {
    width: var(--seg-width);
}

/* Content Area */
.content-area {
    padding: 0;
}

/* Entry Band */
.entry-band {
    display: grid;
    grid-template-columns: 160px 1fr 120px;
    gap: 24px;
    padding: 32px 0;
    border-bottom: 1px solid var(--border-gray);
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin: 0 -16px;
    padding-left: 16px;
    padding-right: 16px;
}

.entry-band:hover {
    background-color: var(--bg-gray);
}

.entry-band:hover .entry-title {
    color: var(--signal-red);
}

.entry-band.featured {
    border-bottom: 2px solid var(--black);
    padding-top: 40px;
    padding-bottom: 40px;
}

/* Entry Meta */
.entry-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
}

.entry-date {
    font-family: 'Space Mono', monospace;
    font-size: 14px;
    color: var(--dark-gray);
}

.entry-category {
    font-family: 'Space Mono', monospace;
    font-size: 11px;
    color: var(--light-gray);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* Entry Content */
.entry-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 24px;
    letter-spacing: -0.01em;
    line-height: 1.3;
    color: var(--black);
    margin-bottom: 8px;
    transition: color 0.2s ease;
}

.featured-title {
    font-size: 36px;
}

.entry-abstract {
    font-family: 'Source Serif 4', serif;
    font-weight: 400;
    font-size: 15px;
    line-height: 1.7;
    color: var(--mid-gray);
}

/* Entry Meta Right */
.entry-meta-right {
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: flex-end;
    padding-top: 4px;
}

.entry-pages {
    font-family: 'Space Mono', monospace;
    font-size: 12px;
    color: var(--light-gray);
}

.entry-ref {
    font-family: 'Space Mono', monospace;
    font-size: 11px;
    color: var(--border-gray);
}

/* Footer */
.site-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0 40px;
    border-top: 1px solid var(--black);
    margin-top: 0;
}

.footer-brand {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: 14px;
    color: var(--black);
    letter-spacing: 0.04em;
}

.footer-count {
    font-family: 'Space Mono', monospace;
    font-size: 12px;
    color: var(--light-gray);
}

/* Responsive */
@media (max-width: 900px) {
    .page-grid {
        padding: 0 32px;
    }

    .entry-band {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .entry-meta {
        flex-direction: row;
        gap: 16px;
        align-items: center;
    }

    .entry-meta-right {
        flex-direction: row;
        gap: 16px;
        align-items: center;
    }

    .featured-title {
        font-size: 28px;
    }

    .header-nav {
        display: none;
    }

    .grid-overlay {
        display: none;
    }
}