:root {
    --bg-main: #0d1117;
    --bg-panel: #161b22d9;
    --text-main: #c9d1d9;
    --text-soft: #8b949e;
    --accent-green: #58ff7c;
    --accent-violet: #6a29e2;
    --accent-blue: #58a6ff;
    --line: rgba(88, 255, 124, 0.2);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Courier New', Courier, monospace;
    overflow: hidden;
}

.header {
    background-color: #161b22ee;
    backdrop-filter: blur(10px);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--accent-violet);
    box-shadow: 0 0 25px rgba(106, 41, 226, 0.3);
}

.navbar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.navbar li {
    position: relative;
}

.navbar a {
    text-decoration: none;
    color: var(--accent-green);
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 1.2rem;
    padding: 10px 20px;
    border-radius: 5px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
}

.navbar a:hover {
    background: #6a29e233;
    border-color: var(--accent-green);
    text-shadow: 0 0 15px var(--accent-green);
    transform: translateY(-2px);
}

.navbar a[href="blog.html"] {
    background: #6a29e266;
    border-color: var(--accent-green);
    box-shadow: 0 0 15px rgba(88, 255, 124, 0.3);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(11, 1fr);
    grid-template-rows: repeat(10, 1fr);
    position: fixed;
    inset: 0;
    z-index: 0;
}

.grid-cell {
    background: url('../imgs/nether_portal.gif') center/contain no-repeat;
    opacity: 0.35;
    filter: saturate(0.75);
}

.grid-overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(145deg, rgba(8, 11, 18, 0.9), rgba(13, 17, 23, 0.96));
    z-index: 1;
}

.ambient {
    position: fixed;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 2;
    pointer-events: none;
}

.ambient-left {
    left: -80px;
    bottom: 80px;
    background: rgba(88, 166, 255, 0.2);
}

.ambient-right {
    right: -90px;
    top: 120px;
    background: rgba(106, 41, 226, 0.22);
}

.blog-shell {
    position: relative;
    z-index: 3;
    display: grid;
    grid-template-columns: minmax(290px, 350px) minmax(0, 1fr);
    gap: 24px;
    width: min(1300px, calc(100vw - 48px));
    margin: 0 auto;
    padding: 105px 0 90px;
    height: 100vh;
}

.bookshelf-panel,
.reader-panel {
    background: var(--bg-panel);
    border: 1px solid rgba(106, 41, 226, 0.45);
    border-radius: 18px;
    backdrop-filter: blur(10px);
    box-shadow: 0 18px 35px rgba(0, 0, 0, 0.35);
}

.bookshelf-panel {
    display: flex;
    flex-direction: column;
    padding: 20px;
    min-height: 0;
}

.bookshelf-head h1 {
    margin: 5px 0 12px;
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 2.1rem;
    color: var(--accent-green);
    letter-spacing: 1px;
    text-shadow: 0 0 18px rgba(88, 255, 124, 0.2);
}

.panel-kicker {
    margin: 0;
    text-transform: uppercase;
    font-size: 0.74rem;
    letter-spacing: 2.6px;
    color: var(--accent-blue);
}

.panel-description {
    margin: 0 0 14px;
    color: var(--text-soft);
    line-height: 1.45;
    font-size: 0.9rem;
}

.panel-description code,
#reader-meta code {
    color: var(--accent-blue);
}

.refresh-button {
    border: 1px solid var(--line);
    background: rgba(88, 255, 124, 0.08);
    color: var(--accent-green);
    border-radius: 10px;
    padding: 10px 14px;
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.refresh-button:hover {
    border-color: var(--accent-green);
    transform: translateY(-1px);
    box-shadow: 0 0 14px rgba(88, 255, 124, 0.2);
}

.bookshelf-status {
    min-height: 1.2em;
    margin: 12px 0 6px;
    color: var(--accent-blue);
    font-size: 0.88rem;
}

.book-list {
    margin-top: 8px;
    overflow-y: auto;
    padding-right: 4px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.book-list::-webkit-scrollbar,
.reader-content::-webkit-scrollbar {
    width: 9px;
}

.book-list::-webkit-scrollbar-thumb,
.reader-content::-webkit-scrollbar-thumb {
    background: rgba(88, 255, 124, 0.3);
    border-radius: 12px;
}

.book-link {
    text-align: left;
    width: 100%;
    padding: 12px 14px;
    border-radius: 11px;
    border: 1px solid transparent;
    background: rgba(13, 17, 23, 0.64);
    color: var(--text-main);
    font-family: inherit;
    cursor: pointer;
    transition: all 0.22s ease;
}

.book-link:hover {
    border-color: rgba(88, 166, 255, 0.5);
    transform: translateX(4px);
}

.book-link.active {
    border-color: var(--accent-green);
    box-shadow: inset 0 0 0 1px rgba(88, 255, 124, 0.5);
    color: var(--accent-green);
}

.book-link small {
    display: block;
    color: var(--text-soft);
    margin-top: 3px;
    font-size: 0.75rem;
}

.reader-panel {
    display: grid;
    grid-template-rows: auto 1fr;
    min-height: 0;
}

.reader-head {
    border-bottom: 1px solid rgba(88, 166, 255, 0.2);
    padding: 22px 28px 16px;
}

.reader-head-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
}

.reader-head h2 {
    margin: 0;
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 1.9rem;
    color: #b8f4ff;
}

.language-switcher {
    display: none;
    align-items: center;
    gap: 8px;
}

.language-switcher.visible {
    display: flex;
}

.lang-tab {
    border: 1px solid rgba(88, 166, 255, 0.35);
    background: rgba(13, 17, 23, 0.55);
    color: #b8f4ff;
    border-radius: 999px;
    padding: 0.25rem 0.75rem;
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    font-family: 'Pixelify Sans', sans-serif;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lang-tab:hover {
    border-color: var(--accent-blue);
}

.lang-tab.active {
    color: #06121b;
    background: var(--accent-green);
    border-color: var(--accent-green);
    box-shadow: 0 0 12px rgba(88, 255, 124, 0.3);
}

.reader-head p {
    margin: 8px 0 0;
    color: var(--text-soft);
    font-size: 0.9rem;
}

.reader-content {
    overflow-y: auto;
    padding: 24px 30px;
    line-height: 1.68;
}

.reader-content h1,
.reader-content h2,
.reader-content h3,
.reader-content h4 {
    color: var(--accent-green);
    font-family: 'Pixelify Sans', sans-serif;
    margin-top: 1.35em;
    margin-bottom: 0.35em;
    letter-spacing: 0.3px;
}

.reader-content p,
.reader-content li,
.reader-content blockquote {
    color: #d1d7de;
}

.reader-content a {
    color: var(--accent-blue);
}

.reader-content ul,
.reader-content ol {
    padding-left: 1.25rem;
}

.reader-content pre {
    background: #0b1320;
    border: 1px solid rgba(88, 166, 255, 0.22);
    border-radius: 12px;
    padding: 0;
    overflow-x: auto;
}

.reader-content p code,
.reader-content li code,
.reader-content blockquote code,
.reader-content td code {
    color: #95f4b6;
    background: rgba(88, 255, 124, 0.09);
    border-radius: 6px;
    padding: 0.15em 0.35em;
}

.reader-content pre code {
    background: transparent;
    padding: 14px;
    border-radius: 12px;
}

.reader-content pre code.hljs {
    display: block;
    background: transparent;
    color: inherit;
}

.reader-content blockquote {
    margin: 1.1rem 0;
    border-left: 3px solid var(--accent-violet);
    padding: 0.4rem 0 0.4rem 1rem;
    background: rgba(106, 41, 226, 0.07);
}

.reader-content hr {
    border: none;
    border-top: 1px solid rgba(88, 255, 124, 0.25);
    margin: 1.8rem 0;
}

.reader-placeholder {
    color: var(--text-soft);
    font-style: italic;
}

footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    z-index: 4;
    background-color: #161b22;
    padding: 15px 0;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.social-links a {
    color: var(--accent-blue);
    text-decoration: none;
    font-family: 'Pixelify Sans', sans-serif;
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: var(--accent-green);
    text-shadow: 0 0 15px rgba(88, 255, 124, 0.4);
}

@media (max-width: 1024px) {
    body {
        overflow-y: auto;
    }

    .blog-shell {
        height: auto;
        grid-template-columns: 1fr;
        padding: 105px 16px 96px;
        width: 100%;
    }

    .bookshelf-panel {
        max-height: 48vh;
    }

    .reader-panel {
        min-height: 56vh;
    }
}

@media (max-width: 760px) {
    .navbar a {
        font-size: 1rem;
        padding: 8px 12px;
    }

    .bookshelf-head h1 {
        font-size: 1.8rem;
    }

    .reader-head,
    .reader-content {
        padding-left: 18px;
        padding-right: 18px;
    }

    .reader-head-top {
        flex-direction: column;
        align-items: flex-start;
    }
}