/* System Theme – Shared styles for glassmorphic dark UI */

:root {
    --bg-base: #030305;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.5);
    --text-tertiary: rgba(255, 255, 255, 0.3);
    --accent-glow: rgba(138, 104, 255, 0.15);

    --glass-bg: rgba(18, 18, 22, 0.4);
    --glass-bg-hover: rgba(30, 30, 38, 0.5);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-highlight: rgba(255, 255, 255, 0.2);
    --glass-blur: blur(24px);
    --glass-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.8),
                    inset 0 1px 0 rgba(255, 255, 255, 0.1);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --panel-radius: 20px;
    --pill-radius: 100px;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body, html {
    width: 100%;
    min-height: 100%;
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    overflow-x: hidden;
    overscroll-behavior: none;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); }

a { color: var(--text-primary); }

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--panel-radius);
    box-shadow: var(--glass-shadow);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.glass-panel::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.02'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: -1;
    mix-blend-mode: overlay;
}

.glass-panel:hover {
    border-color: var(--glass-border-highlight);
    background: var(--glass-bg-hover);
}

.sys-meta {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    display: flex;
    justify-content: space-between;
}

.pill {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    padding: 0.6rem 1.25rem;
    border-radius: var(--pill-radius);
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.pill:hover {
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.pill--highlight {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.2);
}

/* Top nav bar for sub-pages */
.sys-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(3, 3, 5, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.sys-nav__logo {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.05em;
}

.sys-nav__links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    list-style: none;
}

.sys-nav__links a {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.4rem 0.8rem;
    border-radius: var(--pill-radius);
    transition: var(--transition-smooth);
}

.sys-nav__links a:hover,
.sys-nav__links a.active {
    color: var(--text-primary);
    background: rgba(255,255,255,0.05);
}

.sys-nav__socials {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.sys-nav__socials a {
    color: var(--text-tertiary);
    transition: var(--transition-smooth);
    display: flex;
}

.sys-nav__socials a:hover {
    color: var(--text-primary);
}

/* Section headers */
.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    white-space: nowrap;
}

.section-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--glass-border) 0%, transparent 100%);
}

/* Blog listing styles */
.blog-list-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.blog-card-sys {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    text-decoration: none;
    color: var(--text-primary);
    gap: 2rem;
}

.blog-card-sys__meta {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.blog-card-sys__tag {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: inline-block;
    width: fit-content;
    margin-bottom: 0.25rem;
}

.blog-card-sys__title {
    font-size: 1.1rem;
    font-weight: 500;
}

.blog-card-sys__excerpt {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.blog-card-sys__date {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-tertiary);
    margin-top: 0.25rem;
}

.blog-card-sys__arrow {
    color: var(--text-tertiary);
    transition: var(--transition-smooth);
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 0.5rem;
}

.blog-card-sys:hover .blog-card-sys__arrow {
    color: var(--text-primary);
    transform: translateX(5px);
}

/* Article styles */
.article-sys {
    max-width: 720px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

.article-sys__back {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    transition: var(--transition-smooth);
}

.article-sys__back:hover {
    color: var(--text-primary);
}

.article-sys__header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--glass-border);
}

.article-sys__tag {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    padding: 0.3rem 0.6rem;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: inline-block;
    margin-bottom: 1rem;
}

.article-sys__title {
    font-size: 2rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: 1rem;
}

.article-sys__info {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.article-sys__info span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.article-sys__info .dot {
    color: var(--text-tertiary);
}

.article-sys__content {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.article-sys__content p {
    margin-bottom: 1.5rem;
}

.article-sys__content strong {
    color: var(--text-primary);
    font-weight: 500;
}

.article-sys__content h2 {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: 3rem;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.article-sys__content h3 {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.article-sys__content ul,
.article-sys__content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.article-sys__content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.article-sys__content li::marker {
    color: var(--text-tertiary);
}

.article-sys__content code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.article-sys__content pre {
    background: rgba(18, 18, 22, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
}

.article-sys__content pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.8rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
}

.article-sys__content blockquote {
    border-left: 2px solid rgba(138, 104, 255, 0.4);
    padding: 1rem 1.5rem;
    margin: 2rem 0;
    background: rgba(138, 104, 255, 0.05);
    border-radius: 0 12px 12px 0;
    font-style: italic;
    color: var(--text-secondary);
}

.article-sys__footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.article-sys__share {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.article-sys__share span {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.article-sys__share a {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.article-sys__share a:hover {
    color: var(--text-primary);
}

/* Page footer */
.sys-footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--glass-border);
    max-width: 720px;
    margin: 2rem auto 0;
}

.sys-footer__links {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

/* Animations */
@keyframes floatUp {
    0% { opacity: 0; transform: translateY(30px); filter: blur(8px); }
    100% { opacity: 1; transform: translateY(0); filter: blur(0); }
}

.animate-sys {
    animation: floatUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

.animate-sys--delay-1 { animation-delay: 0.1s; }
.animate-sys--delay-2 { animation-delay: 0.2s; }

/* Responsive */
@media (max-width: 768px) {
    .sys-nav { padding: 0.75rem 1rem; }
    .sys-nav__links { display: none; }
    .article-sys { padding: 6rem 1rem 3rem; }
    .article-sys__title { font-size: 1.5rem; }
    .blog-card-sys { padding: 1.25rem; flex-direction: column; gap: 0.75rem; }
}