/* ================================
   acidbrns.cc — Subdomain Stylesheet
   blog.acidbrns.cc, security.acidbrns.cc,
   linux.acidbrns.cc, selfhosting.acidbrns.cc,
   tools.acidbrns.cc
   ================================ */

/* CSS Variables */
:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-card: #222222;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --accent: #00ff88;
    --accent-hover: #00cc6a;
    --accent-glow: rgba(0, 255, 136, 0.15);
    --border: #333333;
    --border-hover: #444444;
    --success: #00ff88;
    --error: #ff4444;
    --warning: #ffaa00;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

/* ================================
   Noise Overlay
   ================================ */
.noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 1000;
}

/* ================================
   Container
   ================================ */
.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ================================
   Main
   ================================ */
main {
    flex: 1;
    padding: 3rem 0;
}

/* ================================
   Header
   ================================ */
header {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Back link — 36×36 square button */
.back-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    flex-shrink: 0;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.back-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

.back-link svg {
    width: 18px;
    height: 18px;
}

/* Logo */
.logo {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-accent {
    color: var(--accent);
}

.logo-divider {
    color: var(--text-muted);
    font-weight: 400;
}

/* Nav */
nav {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

nav a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: color 0.2s ease, background 0.2s ease;
}

nav a:hover,
nav a.active {
    color: var(--accent);
    background: var(--accent-glow);
}

/* ================================
   Page Header
   ================================ */
.page-header {
    margin-bottom: 2rem;
}

.page-header--post {
    margin-bottom: 2.5rem;
}

.category-badge {
    display: inline-flex;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.75rem;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.page-desc {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    max-width: 560px;
}

.privacy-note {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    font-size: 0.875rem;
    color: var(--accent);
}

/* ================================
   Intro Box
   ================================ */
.intro-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2.5rem;
}

.intro-box h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.intro-box p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.intro-box p:last-of-type {
    margin-bottom: 0;
}

.topics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.topic-tag {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 0.25rem 0.625rem;
    border-radius: 4px;
}

/* ================================
   Section Title
   ================================ */
.section-title {
    font-size: 0.8125rem;
    font-family: 'Courier New', Courier, monospace;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

/* ================================
   Posts List
   ================================ */
.posts-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 2.5rem;
}

.post-item {
    display: block;
    padding: 1.5rem;
    background: var(--bg-card);
    text-decoration: none;
    transition: background 0.2s ease;
}

.post-item:hover {
    background: var(--bg-secondary);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.post-date {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.post-tag {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.post-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
    transition: color 0.2s ease;
}

.post-item:hover .post-title {
    color: var(--accent);
}

.post-excerpt {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.post-arrow {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    color: var(--accent);
    font-family: 'Courier New', Courier, monospace;
}

/* ================================
   Resources List
   ================================ */
.resources {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.resource-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    transition: background 0.2s ease;
}

.resource-item:last-child {
    border-bottom: none;
}

.resource-item:hover {
    background: var(--bg-secondary);
}

.resource-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.resource-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.resource-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ================================
   Stack List (selfhosting)
   ================================ */
.stack {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.stack-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.stack-item:last-child {
    border-bottom: none;
}

.stack-icon {
    font-size: 1.25rem;
    width: 32px;
    text-align: center;
    flex-shrink: 0;
}

.stack-name {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 120px;
}

.stack-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ================================
   Blog Post Content
   ================================ */
.post-header {
    margin-bottom: 2.5rem;
}

.post-desc {
    color: var(--text-secondary);
    font-size: 1.0625rem;
}

.post-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.post-content h2 {
    color: var(--text-primary);
    font-size: 1.375rem;
    margin: 2.5rem 0 1rem;
}

.post-content h3 {
    color: var(--text-primary);
    font-size: 1.125rem;
    margin: 2rem 0 0.75rem;
}

.post-content p {
    margin-bottom: 1.25rem;
}

.post-content ul,
.post-content ol {
    margin: 0 0 1.25rem 1.5rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.post-content code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.875rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    color: var(--accent);
}

.post-content pre {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    overflow-x: auto;
}

.post-content pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.8125rem;
    color: var(--text-primary);
}

.post-content strong {
    color: var(--text-primary);
}

.post-content a {
    color: var(--accent);
    text-decoration: none;
}

.post-content a:hover {
    text-decoration: underline;
}

.post-content blockquote {
    border-left: 3px solid var(--accent);
    padding: 0.75rem 1.25rem;
    margin: 1.25rem 0;
    background: var(--accent-glow);
    border-radius: 0 8px 8px 0;
}

.post-content blockquote p {
    margin-bottom: 0;
    color: var(--text-primary);
}

.post-nav {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.post-nav a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    font-weight: 500;
    text-decoration: none;
}

.post-nav a:hover {
    text-decoration: underline;
}

/* ================================
   Blog Index — Categories Grid
   ================================ */
.categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 3rem;
}

.category-card {
    display: block;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.category-card:hover {
    border-color: var(--accent);
    background: var(--bg-secondary);
}

.category-icon {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
}

.category-title {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
    transition: color 0.2s ease;
}

.category-card:hover .category-title {
    color: var(--accent);
}

.category-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ================================
   Tools Index Grid
   ================================ */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.tool-card {
    display: flex;
    flex-direction: column;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    text-decoration: none;
    transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.tool-card:hover {
    border-color: var(--accent);
    background: var(--bg-secondary);
    transform: translateY(-2px);
}

.tool-icon {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.tool-name {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
    transition: color 0.2s ease;
}

.tool-card:hover .tool-name {
    color: var(--accent);
}

.tool-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ================================
   Tool Sub-pages (functional)
   ================================ */
.tool-section {
    margin-bottom: 1.5rem;
}

.section-label {
    display: block;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

textarea {
    width: 100%;
    min-height: 150px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    color: var(--text-primary);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.875rem;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s ease;
}

textarea:focus {
    border-color: var(--accent);
}

textarea::placeholder {
    color: var(--text-muted);
}

.btn-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin: 1rem 0;
}

.btn {
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.875rem;
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

.btn-primary {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

.btn-primary:hover {
    background: rgba(0, 255, 136, 0.25);
}

.btn-secondary {
    color: var(--text-secondary);
}

.status {
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.8125rem;
    display: none;
}

.status.ok {
    background: var(--accent-glow);
    border: 1px solid rgba(0, 255, 136, 0.2);
    color: var(--accent);
    display: block;
}

.status.err {
    background: rgba(255, 68, 68, 0.1);
    border: 1px solid rgba(255, 68, 68, 0.2);
    color: #ff4444;
    display: block;
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.divider-text {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Info box (tool pages) */
.info-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-top: 2rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.info-box strong {
    color: var(--text-primary);
}

/* ================================
   Footer
   ================================ */
footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 1rem;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* ================================
   Selection & Scrollbar
   ================================ */
::selection {
    background: var(--accent);
    color: var(--bg-primary);
}

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

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ================================
   Responsive — max-width 640px
   ================================ */
@media (max-width: 640px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    nav {
        width: 100%;
        overflow-x: auto;
    }

    .page-title {
        font-size: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .categories {
        grid-template-columns: 1fr;
    }

    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stack-name {
        min-width: 80px;
    }
}