/* wallrus.org — intelligence terminal aesthetic */

/* Fonts — loaded async to avoid render-blocking */

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

/* Base — dark mode (default) */
:root {
    --bg: #0a0a0a;
    --bg-raised: #111111;
    --bg-hover: #161616;
    --text: #c8c8c8;
    --text-dim: #666666;
    --text-bright: #e8e8e8;
    --accent: #5ba3a8;
    --accent-dim: #3a7478;
    --accent-glow: #5ba3a815;
    --border: #1e1e1e;
    --border-light: #2a2a2a;
    --mono: 'IBM Plex Mono', 'JetBrains Mono', 'Fira Code', monospace;
    --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-w: 680px;
}

/* Light mode — auto-detect system preference */
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        --bg: #fafafa;
        --bg-raised: #f0f0f0;
        --bg-hover: #e8e8e8;
        --text: #333333;
        --text-dim: #888888;
        --text-bright: #111111;
        --accent: #3a7478;
        --accent-dim: #5ba3a8;
        --accent-glow: #3a747815;
        --border: #e0e0e0;
        --border-light: #d0d0d0;
    }
}

/* Manual override via data-theme attribute */
[data-theme="light"] {
    --bg: #fafafa;
    --bg-raised: #f0f0f0;
    --bg-hover: #e8e8e8;
    --text: #333333;
    --text-dim: #888888;
    --text-bright: #111111;
    --accent: #3a7478;
    --accent-dim: #5ba3a8;
    --accent-glow: #3a747815;
    --border: #e0e0e0;
    --border-light: #d0d0d0;
}

/* Theme toggle button */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-family: var(--mono);
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}

.theme-toggle:hover {
    color: var(--accent);
    border-color: var(--accent-dim);
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header / Nav */
header {
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem;
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 100;
    backdrop-filter: blur(8px);
}

nav {
    max-width: var(--max-w);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-name {
    font-family: var(--mono);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-bright);
    text-decoration: none;
    letter-spacing: 0.08em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.site-logo {
    display: inline-block;
    vertical-align: middle;
}

/* Swap logo for light mode */
[data-theme="light"] .site-logo { content: url('/logo-light.png'); }
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .site-logo { content: url('/logo-light.png'); }
}

.site-name .dim {
    color: var(--accent);
    font-weight: 500;
}

.nav-links {
    display: flex;
    gap: 1.25rem;
    font-family: var(--mono);
    font-size: 0.8rem;
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.15s;
}

.nav-links a:hover {
    color: var(--accent);
}

.rss-link::before {
    content: "◆ ";
    font-size: 0.6rem;
    vertical-align: middle;
}

/* Main */
main {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
    width: 100%;
    flex: 1;
}

/* Briefing article */
.briefing-meta {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.briefing-meta time {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--text-dim);
}

.label-latest {
    font-family: var(--mono);
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--accent);
    border: 1px solid var(--accent-dim);
    padding: 0.1rem 0.4rem;
    letter-spacing: 0.1em;
}

/* Category tags */
.cat-tag {
    font-family: var(--mono);
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--accent-dim);
    background: var(--accent-glow);
    padding: 0.1rem 0.4rem;
    letter-spacing: 0.05em;
}

/* Briefing content */
.briefing h1 {
    font-family: var(--mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-bright);
    line-height: 1.3;
    margin-bottom: 2rem;
    letter-spacing: -0.01em;
}

.briefing h1 a {
    color: inherit;
    text-decoration: none;
}

.briefing h1 a:hover {
    color: var(--accent);
}

.briefing-content h2 {
    font-family: var(--mono);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--border);
}

.briefing-content h3 {
    font-family: var(--mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-bright);
    margin: 1.5rem 0 0.5rem;
}

.briefing-content p {
    margin-bottom: 0.8rem;
    color: var(--text);
}

.briefing-content ul {
    list-style: none;
    margin: 0.5rem 0 1rem;
}

.briefing-content ul li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.briefing-content ul li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent-dim);
    font-size: 0.8rem;
}

.briefing-content strong {
    color: var(--text-bright);
    font-weight: 600;
}

.briefing-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--accent-dim);
    transition: border-color 0.15s;
}

.briefing-content a:hover {
    border-color: var(--accent);
}

.briefing-content code {
    font-family: var(--mono);
    font-size: 0.85em;
    background: var(--bg-raised);
    padding: 0.15rem 0.35rem;
    border: 1px solid var(--border);
}

.briefing-content pre {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    padding: 1rem;
    overflow-x: auto;
    margin: 1rem 0;
    font-size: 0.85rem;
}

.briefing-content pre code {
    background: none;
    border: none;
    padding: 0;
}

.briefing-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}

/* Previous briefings on index */
.previous-briefings {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.previous-briefings h2 {
    font-family: var(--mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
}

.briefing-summary {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

.briefing-summary h3 {
    font-family: var(--mono);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.briefing-summary h3 a {
    color: var(--text-bright);
    text-decoration: none;
}

.briefing-summary h3 a:hover {
    color: var(--accent);
}

.headlines-preview {
    list-style: none;
    margin: 0.4rem 0 0;
}

.headlines-preview li {
    font-size: 0.85rem;
    color: var(--text-dim);
    padding-left: 1rem;
    position: relative;
    margin-bottom: 0.2rem;
}

.headlines-preview li::before {
    content: "–";
    position: absolute;
    left: 0;
    color: var(--border-light);
}

/* Archive */
.archive-list h1 {
    font-family: var(--mono);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 2rem;
}

.archive-year {
    font-family: var(--mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dim);
    margin: 2rem 0 0.75rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--border);
}

.archive-entry {
    padding: 0.4rem 0;
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.archive-entry time {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--text-dim);
    min-width: 3.5rem;
}

.archive-entry a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.9rem;
}

.archive-entry a:hover {
    color: var(--accent);
}

.archive-headlines {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* Empty state */
.empty {
    font-family: var(--mono);
    color: var(--text-dim);
    text-align: center;
    padding: 4rem 0;
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem;
    text-align: center;
}

footer p {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.03em;
}

/* Mobile */
@media (max-width: 640px) {
    main {
        padding: 1.5rem 1rem 3rem;
    }

    .briefing h1 {
        font-size: 1.2rem;
    }

    .briefing-content h2 {
        font-size: 0.8rem;
    }

    nav {
        flex-direction: column;
        gap: 0.5rem;
    }
}