:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --accent-color: #ccff00; /* Acid green */
    --font-head: 'Impact', 'Arial Black', 'Helvetica Neue', sans-serif;
    --font-sans: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Index Page */
.index-container {
    padding: 0;
    width: 100%;
    margin: 0;
}

.site-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 4vw 5vw;
    border-bottom: 4px solid var(--text-color);
    background-color: var(--bg-color);
    position: relative;
    overflow: hidden;
}

.site-logo {
    display: none;
}

.site-title {
    font-size: 15vw;
    font-family: var(--font-head);
    font-weight: 900;
    letter-spacing: -0.05em;
    line-height: 0.85;
    margin: 0;
    text-transform: uppercase;
    word-break: break-all;
}

.post-list {
    display: flex;
    flex-direction: column;
}

.post-item {
    display: flex;
    flex-direction: column;
    padding: 3vw 5vw;
    border-bottom: 2px solid var(--text-color);
    transition: none; /* No ease-in-out, sudden snap */
    position: relative;
    color: var(--text-color);
}

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

.post-meta-col {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 1rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-size: 1rem;
    font-weight: bold;
}

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

.post-title {
    font-size: 4vw;
    font-family: var(--font-head);
    font-weight: 900;
    margin: 0;
    line-height: 1.1;
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

/* Brutalist Language Toggle */
.lang-toggle-container {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1000;
    border-left: 4px solid var(--text-color);
    border-bottom: 4px solid var(--text-color);
}

.lang-toggle {
    background: var(--accent-color);
    color: var(--text-color);
    border: none;
    font-family: var(--font-head);
    font-weight: 900;
    font-size: 1.5rem;
    text-transform: uppercase;
    padding: 1rem 2rem;
    cursor: pointer;
    transition: none;
}

.lang-toggle:hover {
    background: var(--text-color);
    color: var(--accent-color);
}

/* Article Page */
.article-header {
    padding: 12vw 5vw 8vw;
    border-bottom: 4px solid var(--text-color);
    background-color: var(--bg-color);
}

.article-vol {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-color);
    background: var(--accent-color);
    display: inline-block;
    padding: 0.2rem 0.5rem;
    margin-bottom: 2rem;
    border: 2px solid var(--text-color);
}

.article-title {
    font-size: 8vw;
    font-family: var(--font-head);
    font-weight: 900;
    line-height: 0.9;
    margin: 0 0 2rem 0;
    letter-spacing: -0.03em;
    text-transform: uppercase;
}

.article-meta {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-color);
    text-transform: uppercase;
    border-top: 2px solid var(--text-color);
    padding-top: 1rem;
}

.article-content {
    max-width: 100%;
    margin: 0;
    padding: 5vw;
    font-family: var(--font-sans);
    font-size: 1.25rem;
    line-height: 1.6;
    font-weight: 500;
}

.article-content h2, .article-content h3 {
    font-family: var(--font-head);
    text-transform: uppercase;
    font-weight: 900;
    margin-top: 4rem;
    margin-bottom: 1rem;
    line-height: 1.1;
    border-bottom: 2px solid var(--text-color);
    padding-bottom: 0.5rem;
}

.article-content h2 { font-size: 3.5rem; letter-spacing: -0.02em; }
.article-content h3 { font-size: 2.5rem; }

.article-content p {
    margin-bottom: 1.5rem;
    max-width: 800px;
}

.article-content a {
    color: var(--text-color);
    background: var(--accent-color);
    font-weight: bold;
    padding: 0 0.2rem;
    border: 2px solid var(--text-color);
}

.article-content a:hover {
    background: var(--text-color);
    color: var(--accent-color);
}

.article-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 4rem 0;
    border: 4px solid var(--text-color);
    filter: grayscale(100%) contrast(150%);
    transition: filter 0s;
}

.article-content img:hover {
    filter: none;
}

.article-content blockquote {
    margin: 3rem 0;
    padding: 2rem;
    border: 4px solid var(--text-color);
    background: var(--accent-color);
    font-weight: 900;
    color: var(--text-color);
    font-size: 1.5rem;
    line-height: 1.4;
    font-family: var(--font-head);
    text-transform: uppercase;
}

.article-content pre {
    background-color: var(--text-color);
    padding: 2rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1.4;
    margin: 3rem 0;
    color: var(--accent-color);
    border: none;
}

.article-content code {
    font-family: var(--font-mono);
    background-color: var(--text-color);
    color: var(--accent-color);
    padding: 0.2em 0.4em;
    font-size: 0.9em;
}

.article-content pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
}

.article-content hr {
    border: 0;
    height: 4px;
    background: var(--text-color);
    margin: 4rem 0;
}

.nav-back {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: var(--font-head);
    font-size: 1.5rem;
    font-weight: 900;
    text-transform: uppercase;
    background: var(--text-color);
    color: var(--bg-color);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 900;
    border-bottom: 4px solid var(--text-color);
    border-right: 4px solid var(--text-color);
}

.nav-back:hover {
    background: var(--accent-color);
    color: var(--text-color);
}

@media (max-width: 768px) {
    .site-title { font-size: 20vw; }
    .post-item { padding: 5vw; }
    .post-title { font-size: 8vw; }
    .post-meta-col { flex-direction: column; gap: 0.5rem; }
    .article-title { font-size: 12vw; }
    .article-content h2 { font-size: 2.5rem; }
    .article-content h3 { font-size: 1.8rem; }
    .lang-toggle { font-size: 1.2rem; padding: 0.8rem 1.2rem; }
    .nav-back { font-size: 1.2rem; padding: 0.8rem 1.2rem; position: relative; border: 4px solid var(--text-color); margin: 5vw 0 0 5vw;}
}

/* Custom Thought Divider for 闪念集 */
.article-content hr.thought-hr {
    border: none !important;
    height: 0 !important;
    background: transparent !important;
    max-width: 800px; /* Align visual width with paragraph content */
    text-align: center;
    margin: 3.5rem 0;
    overflow: visible;
}

.article-content hr.thought-hr::after {
    content: "///";
    font-family: var(--font-head);
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--text-color);
    opacity: 0.4;
    letter-spacing: 0.6rem;
    display: inline-block;
    transform: skewX(-12deg);
    padding-left: 0.6rem; /* offset letter-spacing */
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.article-content hr.thought-hr:hover::after {
    opacity: 1;
    color: var(--text-color);
    transform: skewX(-20deg) scale(1.15);
}

/* Elegant Footnotes Styling */
.footnote-ref {
    font-size: 0.75em;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
    top: -0.5em;
    margin-left: 0.15em;
    margin-right: 0.15em;
}

.footnote-ref a {
    background: transparent !important;
    border: none !important;
    color: var(--text-color) !important;
    opacity: 0.6;
    padding: 0 !important;
    font-weight: bold !important;
    transition: opacity 0.2s;
}

.footnote-ref a:hover {
    background: transparent !important;
    color: var(--text-color) !important;
    opacity: 1;
    text-decoration: underline;
}

.article-content hr.footnotes-sep {
    border: 0;
    border-top: 2px dashed var(--text-color);
    height: 0;
    margin: 4rem 0 2rem 0;
    opacity: 0.3;
}

.article-content .footnotes {
    font-size: 1rem;
    line-height: 1.6;
    opacity: 0.8;
    margin-top: 2rem;
}

.article-content .footnotes-list {
    padding-left: 1.5rem;
    margin: 0;
}

.article-content .footnote-item {
    margin-bottom: 0.8rem;
    word-break: break-all;
}

/* Footnote inner links override brutalist styling */
.article-content .footnote-item a {
    background: transparent !important;
    border: none !important;
    border-bottom: 1px solid var(--text-color) !important;
    padding: 0 !important;
    font-weight: normal !important;
    color: var(--text-color) !important;
}

.article-content .footnote-item a:hover {
    background: var(--text-color) !important;
    color: var(--bg-color) !important;
}

.article-content .footnote-backref {
    border: none !important;
    text-decoration: none !important;
    margin-left: 0.4rem;
    font-family: var(--font-sans);
    opacity: 0.5;
    transition: opacity 0.2s;
    display: inline-block;
}

.article-content .footnote-backref:hover {
    background: transparent !important;
    color: var(--text-color) !important;
    opacity: 1;
}