/* Retro DOS/phrack.org Theme */

@font-face {
    font-family: 'Px437_IBM_VGA_8x16';
    src: url('/assets/fonts/Web437_IBM_VGA_8x16.woff') format('woff');
}

:root {
    --max: 960px;
    --fg: #00FF00;
    --muted: #00CC00;
    --line: #008800;
    --bg: #000000;
    --soft: #001100;
    --accent: #00FF00;
}

body {
    margin: 0;
    font-family: 'Px437_IBM_VGA_8x16', monospace;
    font-size: 16px;
    line-height: 20px;
    color: var(--fg);
    background: var(--bg);
}

.container {
    max-width: 920px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    font-size: 24px;
    margin: 20px 0;
    color: var(--fg);
    text-align: center;
}

.header {
    border: 2px solid var(--fg);
    border-style: double;
    padding: 20px;
    margin: 20px 0;
    background: var(--soft);
}

.header img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

.nav {
    border: 2px solid var(--line);
    border-style: double;
    padding: 15px;
    margin: 20px 0;
    background: var(--bg);
}

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

.nav li {
    margin: 8px 0;
}

.nav a {
    color: #FFFFFF;
    text-decoration: none;
}

.nav a:hover {
    color: var(--fg);
    text-decoration: underline;
}

.issue {
    border: 1px solid var(--line);
    padding: 15px;
    margin: 15px 0;
    background: var(--soft);
}

.issue-title {
    font-size: 18px;
    color: var(--fg);
    margin: 0 0 10px 0;
}

.issue-meta {
    font-size: 12px;
    color: var(--muted);
    margin: 5px 0;
}

.issue-description {
    margin: 10px 0;
    color: var(--fg);
}

.issue-tags {
    margin: 10px 0;
}

.tag {
    display: inline-block;
    font-size: 11px;
    color: var(--muted);
    border: 1px solid var(--line);
    padding: 2px 8px;
    margin-right: 5px;
    margin-bottom: 5px;
}

.footer {
    border-top: 1px solid var(--line);
    margin-top: 40px;
    padding-top: 20px;
    text-align: center;
    color: var(--muted);
    font-size: 12px;
}

.support-link {
    margin-top: 20px;
    padding-top: 15px;
}

.support-link img {
    image-rendering: auto;
    opacity: 0.9;
    transition: opacity 0.2s ease;
}

.support-link img:hover {
    opacity: 1;
}

.footer a {
    color: #FFFFFF;
    text-decoration: none;
}

.footer a:hover {
    color: var(--fg);
    text-decoration: underline;
}

a {
    color: #FFFFFF;
    text-decoration: none;
}

a:hover {
    color: var(--fg);
    text-decoration: underline;
}

/* Modal styles */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    overflow-y: auto;
    padding: 20px;
    box-sizing: border-box;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    border: 2px solid var(--fg);
    border-style: double;
    background: var(--soft);
    padding: 20px;
    max-width: 520px;
    width: 100%;
    position: relative;
    margin: auto;
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    color: #FFFFFF;
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    padding: 5px 10px;
    border: 1px solid var(--line);
    background: var(--bg);
}

.modal-close:hover {
    color: var(--fg);
    border-color: var(--fg);
}

.modal-content iframe {
    border: 1px solid var(--line);
    background: var(--bg);
    display: block;
    width: 100%;
    max-width: 480px;
    height: 540px;
    overflow: hidden;
}

@media (max-width: 480px) {
    .modal-content { padding: 12px; }
    .modal-content iframe { height: 420px; }
}

.modal-overlay.active .modal-content iframe {
    outline: none;
}

/* Theme Switcher */
.theme-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10001;
    background: var(--bg);
    border: 2px solid var(--line);
    border-style: double;
    padding: 8px 12px;
    cursor: pointer;
    font-family: 'Px437_IBM_VGA_8x16', monospace;
    font-size: 12px;
    color: var(--fg);
}

.theme-switcher:hover {
    border-color: var(--fg);
    background: var(--soft);
}

/* Individual concept page styles */
header,
main,
footer {
    max-width: var(--max);
    margin: 0 auto;
    padding: 26px 18px;
}

header {
    padding-top: 44px;
    padding-bottom: 18px;
}

h1 {
    font-size: 36px;
    line-height: 1.12;
    margin: 0 0 10px 0;
    letter-spacing: -0.02em;
}

.sub {
    color: var(--muted);
    font-size: 18px;
    margin: 0 0 8px 0;
    text-align: center;
}

.meta {
    color: var(--muted);
    font-size: 14px;
    margin: 14px 0 0 0;
    text-align: center;
}

.kicker {
    font-size: 13px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 0 0 10px 0;
}

hr {
    border: 0;
    border-top: 1px solid var(--line);
    margin: 22px 0;
}

h2 {
    font-size: 20px;
    margin: 28px 0 10px 0;
}

h3 {
    font-size: 17px;
    margin: 18px 0 8px 0;
}

p {
    margin: 10px 0;
}

ul {
    margin: 10px 0 10px 18px;
}

li {
    margin: 6px 0;
}

strong {
    font-weight: 650;
}

.callout {
    border: 2px solid var(--line);
    border-radius: 0;
    padding: 14px;
    background: var(--soft);
    margin: 14px 0;
    border-style: double;
}

.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

@media (min-width: 860px) {
    .grid {
        grid-template-columns: 1fr 1fr;
    }
}

.card {
    border: 1px solid var(--line);
    border-radius: 0;
    padding: 14px;
    background: var(--bg);
    border-style: double;
}

.small {
    font-size: 14px;
    color: var(--muted);
}

.quote {
    border-left: 3px solid var(--accent);
    padding-left: 12px;
    margin: 14px 0;
    color: var(--fg);
}

.glossary dt {
    font-weight: 650;
    margin-top: 12px;
}

.glossary dd {
    margin: 6px 0 0 0;
    color: var(--fg);
}

.glossary .ex {
    margin-top: 6px;
    color: var(--muted);
    font-size: 14px;
}

.diagram-wrap {
    border: 1px solid var(--line);
    border-radius: 0;
    padding: 12px;
    background: var(--bg);
    overflow: auto;
    margin: 12px 0;
    border-style: double;
}

code, pre {
    font-family: 'Px437_IBM_VGA_8x16', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 13px;
}

pre {
    border: 1px solid var(--line);
    border-radius: 0;
    padding: 12px;
    background: var(--soft);
    overflow: auto;
    margin: 12px 0;
    border-style: double;
}

footer {
    color: var(--muted);
    font-size: 14px;
    padding-top: 18px;
    padding-bottom: 44px;
}

.nav-links {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
    text-align: center;
}

.nav-links a {
    color: #FFFFFF;
    text-decoration: none;
    margin: 0 10px;
}

.nav-links a:hover {
    color: var(--fg);
    text-decoration: underline;
}

.example-scenario {
    border: 1px solid var(--line);
    border-radius: 0;
    padding: 14px;
    background: var(--bg);
    margin: 14px 0;
    border-style: double;
}

.example-scenario h4 {
    margin: 0 0 10px 0;
    font-size: 15px;
    color: var(--fg);
}

.signal-type {
    border: 1px solid var(--line);
    border-radius: 0;
    padding: 14px;
    background: var(--bg);
    margin: 14px 0;
    border-style: double;
}

.signal-type h4 {
    margin: 0 0 8px 0;
    font-size: 15px;
    color: var(--fg);
}

.sectionline {
    margin-top: 26px;
}

.comparison {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin: 24px 0;
}

@media (min-width: 820px) {
    .comparison {
        grid-template-columns: 1fr 1fr;
    }
}

.comparison-item {
    text-align: center;
}

.comparison-item img {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 0;
    border: 2px solid var(--line);
    border-style: double;
}

.comparison-label {
    margin-top: 10px;
    font-size: 14px;
    color: var(--muted);
    font-weight: 500;
}