:root {
    --color-surface: #f8f9fa;
    --color-surface-lowest: #ffffff;
    --color-surface-low: #f3f4f5;
    --color-surface-container: #edeeef;
    --color-surface-high: #e7e8e9;
    --color-surface-highest: #e1e3e4;
    --color-text: #191c1d;
    --color-text-muted: #45464c;
    --color-outline: #76777d;
    --color-outline-soft: #c6c6cd;
    --color-primary: #000000;
    --color-primary-container: #141b2b;
    --color-primary-fixed: #dce2f7;
    --color-primary-fixed-dim: #c0c6db;
    --color-on-primary: #ffffff;
    --color-error: #ba1a1a;
    --space-xs: 4px;
    --space-sm: 12px;
    --space-base: 8px;
    --space-md: 24px;
    --space-lg: 48px;
    --space-xl: 80px;
    --container-max: 1280px;
    --gutter: 24px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-xxl: 32px;
    --radius-full: 9999px;
    --font-main: "Geist", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.06);
    --border-soft: 1px solid rgba(198, 198, 205, 0.3);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--color-surface);
    color: var(--color-text);
    font-family: var(--font-main);
    -webkit-font-smoothing: antialiased;
}

body,
button,
input {
    font-family: var(--font-main);
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

table {
    border-collapse: collapse;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-surface);
}

::-webkit-scrollbar-thumb {
    background: #e5e7eb;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #d1d5db;
}

.material-symbols-outlined {
    font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
    vertical-align: middle;
}

.content-shell {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 120px var(--gutter) var(--space-xl);
}

.content-article {
    max-width: 780px;
}

.content-article h1 {
    margin: 0 0 var(--space-md);
    font-size: 48px;
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.archive-list {
    display: grid;
    gap: var(--space-md);
}

.archive-card {
    padding: var(--space-md);
    background: var(--color-surface-lowest);
    border: var(--border-soft);
    border-radius: var(--radius-xl);
}

.section-shell {
    max-width: var(--container-max);
    margin: 0 auto;
    padding-right: var(--gutter);
    padding-left: var(--gutter);
}

.eyebrow {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.section-title {
    margin: 0 0 var(--space-xs);
    font-size: 30px;
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-kicker {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 16px;
    line-height: 1.6;
}

.display-title {
    margin: 0;
    font-size: 48px;
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.body-large {
    color: var(--color-text-muted);
    font-size: 18px;
    line-height: 1.6;
}

.label-small {
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: 0.05em;
}

.label-medium {
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    letter-spacing: 0.02em;
}

.primary-button,
.secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 0;
    padding: var(--space-md) var(--space-lg);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, background 0.2s ease-out;
}

.primary-button {
    background: var(--color-primary);
    color: var(--color-on-primary);
}

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

.primary-button:hover,
.secondary-button:hover,
.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.secondary-button:hover {
    background: var(--color-surface-low);
}

.ghost-card {
    background: var(--color-surface-lowest);
    border: var(--border-soft);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
}

.split-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.tag {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-on-primary);
    border-radius: var(--radius-full);
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.is-dark {
    --color-surface: #191c1f;
    --color-surface-lowest: #111315;
    --color-surface-low: #202326;
    --color-surface-container: #2b2f33;
    --color-surface-high: #34383d;
    --color-surface-highest: #3d4248;
    --color-text: #f0f1f2;
    --color-text-muted: #c4c7ca;
    --color-primary: #ffffff;
    --color-on-primary: #000000;
}

@media (max-width: 767px) {
    :root {
        --gutter: 16px;
        --space-xl: 64px;
    }

    .display-title,
    .content-article h1 {
        font-size: 36px;
        line-height: 1.2;
        letter-spacing: -0.03em;
    }

    .primary-button,
    .secondary-button {
        width: 100%;
        padding-right: var(--space-md);
        padding-left: var(--space-md);
    }
}