/* ============================================================
   nebigr-aurora — single-file global stylesheet
   WebGL fluid + 3D tilt + cursor spotlight aesthetic.
   Light/dark via prefers-color-scheme + manual override on <html data-theme>.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@300;400;500;600;700&family=Orbitron:wght@500;600;700;800&display=swap');

/* -------- 0. Reset -------- */
*, *::before, *::after { box-sizing: border-box; }
html, body, h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }

/* -------- 1. Theme variables -------- */
:root {
    --bg-1: #070716;
    --bg-2: #1a0b2e;
    --bg-3: #0f1538;
    --surface: rgba(15, 18, 38, 0.72);
    --surface-strong: rgba(12, 14, 30, 0.94);
    --card-bg: rgba(20, 22, 48, 0.42);
    --card-bg-hover: rgba(28, 32, 64, 0.58);
    --card-border: rgba(255, 255, 255, 0.09);
    --card-border-hover: rgba(178, 102, 255, 0.55);
    --card-shadow: rgba(91, 140, 255, 0.18);
    --card-shadow-hover: rgba(178, 102, 255, 0.32);
    --text-strong: #f4f5ff;
    --text-body: rgba(244, 245, 255, 0.88);
    --text-muted: rgba(244, 245, 255, 0.6);
    --text-faint: rgba(244, 245, 255, 0.4);
    --accent: #b266ff;
    --accent-2: #5b8cff;
    --accent-3: #ff5cdb;
    --accent-glow: rgba(178, 102, 255, 0.45);
    --code-bg: rgba(8, 10, 24, 0.78);
    --chip-bg: rgba(91, 140, 255, 0.2);
    --chip-text: #d6c2ff;
    --spotlight-blend: screen;
    --spotlight-color: rgba(178, 102, 255, 0.22);
    --line: rgba(255, 255, 255, 0.08);

    --radius-sm: 8px;
    --radius: 16px;
    --radius-lg: 24px;
    --container: 1280px;
    --reading: 760px;
    --nav-h: 64px;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

html[data-theme='light'] {
    --bg-1: #fafaff;
    --bg-2: #f0e9ff;
    --bg-3: #fde4f6;
    --surface: rgba(255, 255, 255, 0.78);
    --surface-strong: rgba(255, 255, 255, 0.96);
    --card-bg: rgba(255, 255, 255, 0.62);
    --card-bg-hover: rgba(255, 255, 255, 0.85);
    --card-border: rgba(124, 92, 255, 0.16);
    --card-border-hover: rgba(124, 92, 255, 0.55);
    --card-shadow: rgba(124, 92, 255, 0.14);
    --card-shadow-hover: rgba(255, 107, 181, 0.24);
    --text-strong: #14102b;
    --text-body: #2a2050;
    --text-muted: #5a4f7a;
    --text-faint: #8c83a8;
    --accent: #7c5cff;
    --accent-2: #5cc8ff;
    --accent-3: #ff6bb5;
    --accent-glow: rgba(124, 92, 255, 0.38);
    --code-bg: rgba(20, 14, 50, 0.06);
    --chip-bg: rgba(124, 92, 255, 0.12);
    --chip-text: #4d2fbf;
    --spotlight-blend: multiply;
    --spotlight-color: rgba(124, 92, 255, 0.18);
    --line: rgba(20, 16, 43, 0.08);
}

/* -------- 2. Body / typography base -------- */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
    min-height: 100vh;
    font-family: 'Exo 2', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-body);
    line-height: 1.75;
    background:
        radial-gradient(ellipse 80% 60% at 20% 8%, var(--bg-2) 0%, transparent 60%),
        radial-gradient(ellipse 70% 50% at 80% 92%, var(--bg-3) 0%, transparent 60%),
        var(--bg-1);
    background-attachment: fixed;
    overflow-x: hidden;
    transition: background 0.6s var(--ease), color 0.4s var(--ease);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Orbitron', 'Exo 2', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-strong);
    line-height: 1.25;
    letter-spacing: 0.5px;
    font-weight: 600;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 2em; margin-bottom: 0.75em; }
h3 { font-size: 1.4rem; margin-top: 1.6em; margin-bottom: 0.6em; }
h4 { font-size: 1.2rem; margin-top: 1.4em; margin-bottom: 0.5em; }

p { margin: 0 0 1em; }

a { color: var(--accent-2); transition: color 0.2s var(--ease), text-shadow 0.2s var(--ease); }
a:hover { color: var(--accent); text-shadow: 0 0 12px var(--accent-glow); }

::selection { background: var(--accent); color: #fff; }
::-moz-selection { background: var(--accent); color: #fff; }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* -------- 3. Page-wide effects DOM -------- */
#webgl-fluid-canvas {
    position: fixed; inset: 0;
    width: 100vw; height: 100vh;
    z-index: -2;
    pointer-events: none;
    opacity: 0.55;
    mix-blend-mode: screen;
}
html[data-theme='light'] #webgl-fluid-canvas {
    opacity: 0.42;
    mix-blend-mode: multiply;
}

#cursor-spotlight {
    position: fixed; inset: 0;
    width: 100vw; height: 100vh;
    z-index: 9998;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s var(--ease);
    mix-blend-mode: var(--spotlight-blend);
    background: radial-gradient(
        320px circle at var(--mx, -1000px) var(--my, -1000px),
        var(--spotlight-color),
        transparent 70%
    );
}

/* skip link */
.skip-link {
    position: fixed;
    top: -100px;
    left: 16px;
    padding: 10px 16px;
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-sm);
    z-index: 10000;
    transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 16px; }

/* -------- 4. Layout containers -------- */
.app {
    padding-top: var(--nav-h);
    min-height: 100vh;
    position: relative;
    z-index: 1;
}
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* -------- 5. Navigation -------- */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-h);
    z-index: 100;
    background: var(--surface);
    backdrop-filter: blur(22px) saturate(1.4);
    -webkit-backdrop-filter: blur(22px) saturate(1.4);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 4px 24px var(--card-shadow);
    transition: background 0.4s var(--ease);
}
.nav__inner {
    height: 100%;
    display: flex;
    align-items: center;
    gap: 24px;
}
.nav__brand {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--text-strong);
    letter-spacing: 1px;
    background: linear-gradient(135deg, var(--accent-2), var(--accent), var(--accent-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    flex-shrink: 0;
}
.nav__menu {
    display: flex;
    gap: 4px;
    flex: 1;
    overflow-x: auto;
    scrollbar-width: none;
}
.nav__menu::-webkit-scrollbar { display: none; }
.nav__link {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    color: var(--text-body);
    font-size: 0.95rem;
    white-space: nowrap;
    transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav__link:hover, .nav__link.is-active {
    color: var(--text-strong);
    background: var(--card-bg);
    text-shadow: none;
}
.nav__actions { display: flex; gap: 8px; flex-shrink: 0; }
.icon-btn {
    width: 40px; height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-body);
    background: transparent;
    transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.icon-btn:hover { background: var(--card-bg); color: var(--accent); }
.icon-btn svg { width: 20px; height: 20px; stroke-width: 2; }
.nav__hamburger { display: none; }

@media (max-width: 900px) {
    .nav__menu { display: none; }
    .nav__hamburger { display: inline-flex; }
    .nav__menu.is-open {
        display: flex;
        position: fixed;
        top: var(--nav-h);
        left: 0; right: 0;
        flex-direction: column;
        background: var(--surface-strong);
        backdrop-filter: blur(22px);
        padding: 16px;
        gap: 4px;
        border-bottom: 1px solid var(--line);
        max-height: calc(100vh - var(--nav-h));
        overflow-y: auto;
    }
    .nav__menu.is-open .nav__link { padding: 12px 16px; }
}

/* -------- 6. Hero (home) -------- */
.hero {
    min-height: calc(100vh - var(--nav-h));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 48px 24px;
    position: relative;
}
.hero__title {
    font-family: 'Orbitron', sans-serif;
    font-weight: 800;
    font-size: clamp(3rem, 9vw, 7rem);
    line-height: 1.15;
    padding-bottom: 0.12em;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--accent-2) 0%, var(--accent) 50%, var(--accent-3) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 80px var(--accent-glow);
    animation: hero-pop 1.2s var(--ease) both;
}
.hero__subtitle {
    margin-top: 24px;
    font-size: clamp(1rem, 2vw, 1.4rem);
    color: var(--text-body);
    letter-spacing: 4px;
    animation: hero-pop 1.2s 0.2s var(--ease) both;
}
.hero__scroll {
    margin-top: 64px;
    color: var(--text-muted);
    font-size: 0.85rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    animation: scroll-bob 2.4s ease-in-out infinite;
}
.hero__scroll::after {
    content: '';
    display: block;
    width: 1px;
    height: 36px;
    margin: 12px auto 0;
    background: linear-gradient(180deg, var(--accent), transparent);
}
@keyframes hero-pop { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes scroll-bob { 0%, 100% { transform: translateY(0); opacity: 0.7; } 50% { transform: translateY(8px); opacity: 1; } }

/* -------- 7. Card / post-card -------- */
.section {
    padding: 64px 0;
}
.section__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 32px;
    gap: 16px;
}
.section__title {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    margin: 0;
}
.section__title small {
    margin-left: 12px;
    color: var(--text-muted);
    font-size: 0.5em;
    font-family: 'Exo 2', sans-serif;
    letter-spacing: 2px;
}
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}
.post-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform-style: preserve-3d;
    transition: background 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
    box-shadow: 0 8px 32px var(--card-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.post-card:hover {
    background: var(--card-bg-hover);
    border-color: var(--card-border-hover);
    box-shadow: 0 16px 48px var(--card-shadow-hover), 0 0 0 1px var(--accent), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}
.post-card__cover {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    position: relative;
}
.post-card__cover img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease);
}
.post-card:hover .post-card__cover img { transform: scale(1.06); }
.post-card__body {
    padding: 20px 22px 22px;
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 12px;
}
.post-card__title {
    font-family: 'Orbitron', 'Exo 2', sans-serif;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-strong);
    line-height: 1.4;
    letter-spacing: 0;
    margin: 0;
}
.post-card__summary {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}
.post-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    align-items: center;
    color: var(--text-faint);
    font-size: 0.82rem;
    margin-top: 4px;
}
.post-card__meta svg { width: 14px; height: 14px; }
.post-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.chip {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 999px;
    background: var(--chip-bg);
    color: var(--chip-text);
    font-size: 0.78rem;
    border: 1px solid var(--card-border);
    transition: all 0.2s var(--ease);
}
.chip:hover { background: var(--accent); color: #fff; box-shadow: 0 4px 18px var(--accent-glow); }

/* -------- 8. Pagination -------- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin: 64px 0 24px;
    flex-wrap: wrap;
}
.pagination a, .pagination span {
    min-width: 40px;
    height: 40px;
    padding: 0 14px;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-body);
    backdrop-filter: blur(12px);
    transition: all 0.2s var(--ease);
}
.pagination a:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    text-shadow: none;
}
.pagination .current {
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 6px 20px var(--accent-glow);
}

/* -------- 9. Post detail -------- */
.post-header {
    padding: 96px 0 48px;
    text-align: center;
    position: relative;
}
.post-header__cover {
    position: absolute;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    opacity: 0.5;
}
.post-header__cover img {
    width: 100%; height: 100%; object-fit: cover;
    filter: blur(40px) saturate(1.4);
    transform: scale(1.2);
}
.post-header__cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, var(--bg-1) 100%);
}
.post-header__title {
    font-size: clamp(1.8rem, 5vw, 3.5rem);
    margin: 0 0 16px;
    background: linear-gradient(135deg, var(--text-strong) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.post-header__meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    color: var(--text-muted);
    font-size: 0.9rem;
    flex-wrap: wrap;
}
.post-header__meta span { display: inline-flex; align-items: center; gap: 6px; }
.post-header__meta svg { width: 14px; height: 14px; }

.post-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}
@media (min-width: 1100px) {
    .post-layout {
        grid-template-columns: minmax(0, 760px) 240px;
        justify-content: center;
        gap: 48px;
    }
}

.post-body {
    background: var(--card-bg);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 40px clamp(20px, 4vw, 56px);
    box-shadow: 0 8px 32px var(--card-shadow);
    color: var(--text-body);
    font-size: 1.02rem;
    line-height: 1.85;
    overflow-wrap: break-word;
}
.post-body h1, .post-body h2, .post-body h3, .post-body h4 {
    color: var(--text-strong);
    border-left: 4px solid var(--accent);
    padding-left: 14px;
    margin-top: 1.6em;
}
.post-body h1 { font-size: 1.7rem; }
.post-body h2 { font-size: 1.45rem; }
.post-body h3 { font-size: 1.2rem; }
.post-body p { margin: 0 0 1.1em; }
.post-body img {
    border-radius: var(--radius-sm);
    margin: 1.4em auto;
    cursor: zoom-in;
    box-shadow: 0 6px 24px var(--card-shadow);
}
.post-body a {
    border-bottom: 1px dashed currentColor;
    transition: all 0.2s var(--ease);
}
.post-body a:hover { border-bottom-style: solid; }
.post-body code {
    background: var(--code-bg);
    color: var(--text-strong);
    border: 1px solid var(--card-border);
    border-radius: 5px;
    padding: 1px 6px;
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    font-size: 0.92em;
}
.post-body pre {
    background: var(--code-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 18px 20px;
    overflow-x: auto;
    margin: 1.4em 0;
    position: relative;
    backdrop-filter: blur(12px);
}
.post-body pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.88rem;
    line-height: 1.7;
}
.post-body blockquote {
    background: var(--card-bg);
    border-left: 4px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 14px 20px;
    margin: 1.4em 0;
    color: var(--text-body);
    backdrop-filter: blur(12px);
}
.post-body blockquote p:last-child { margin-bottom: 0; }
.post-body ul, .post-body ol {
    padding-left: 1.4em;
    margin: 0 0 1.1em;
}
.post-body ul { list-style: disc; }
.post-body ol { list-style: decimal; }
.post-body li { margin: 0.3em 0; }
.post-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.4em 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.post-body th, .post-body td {
    padding: 10px 14px;
    border: 1px solid var(--line);
    text-align: left;
}
.post-body th { background: var(--card-bg); color: var(--text-strong); }
.post-body hr { border: 0; height: 1px; background: var(--line); margin: 2.4em 0; }
.post-body strong { color: var(--text-strong); }

.copy-btn {
    position: absolute;
    top: 8px; right: 8px;
    padding: 4px 10px;
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-muted);
    border: 1px solid var(--card-border);
    opacity: 0;
    transition: opacity 0.2s var(--ease), color 0.2s var(--ease);
}
.post-body pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: var(--accent); }
.copy-btn.is-copied { color: var(--accent-3); }

/* TOC */
.toc {
    position: sticky;
    top: calc(var(--nav-h) + 24px);
    align-self: start;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 20px;
    backdrop-filter: blur(20px);
    max-height: calc(100vh - var(--nav-h) - 48px);
    overflow-y: auto;
    font-size: 0.86rem;
    display: none;
}
@media (min-width: 1100px) { .toc { display: block; } }
.toc__title {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 3px;
    margin-bottom: 12px;
    text-transform: uppercase;
}
.toc ol { padding-left: 0; }
.toc ol ol { padding-left: 14px; }
.toc li { margin: 4px 0; list-style: none; }
.toc a {
    display: block;
    color: var(--text-muted);
    border-left: 2px solid transparent;
    padding: 4px 10px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: all 0.2s var(--ease);
    line-height: 1.4;
}
.toc a:hover { color: var(--text-strong); background: var(--card-bg-hover); text-shadow: none; }
.toc a.is-active { color: var(--accent); border-left-color: var(--accent); background: var(--card-bg-hover); }

.post-footer {
    margin-top: 24px;
    display: grid;
    gap: 24px;
}
.post-license {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 20px 24px;
    color: var(--text-muted);
    font-size: 0.88rem;
    backdrop-filter: blur(16px);
}
.post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
@media (max-width: 600px) { .post-nav { grid-template-columns: 1fr; } }
.post-nav__item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 16px 20px;
    backdrop-filter: blur(16px);
    transition: all 0.25s var(--ease);
    color: var(--text-body);
}
.post-nav__item:hover {
    border-color: var(--accent);
    background: var(--card-bg-hover);
    color: var(--text-strong);
    text-shadow: none;
}
.post-nav__label {
    color: var(--text-faint);
    font-size: 0.78rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 4px;
}

/* -------- 10. Archive timeline -------- */
.archive-year {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.2rem;
    color: var(--accent);
    margin: 48px 0 24px;
    text-shadow: 0 0 24px var(--accent-glow);
}
.archive-list { position: relative; padding-left: 28px; }
.archive-list::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0; left: 8px;
    width: 1px;
    background: linear-gradient(180deg, var(--accent), transparent);
}
.archive-item {
    position: relative;
    padding: 14px 0 14px 18px;
    transition: padding 0.25s var(--ease);
}
.archive-item::before {
    content: '';
    position: absolute;
    left: -25px;
    top: 24px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 3px var(--bg-1), 0 0 14px var(--accent);
}
.archive-item:hover { padding-left: 26px; }
.archive-item__date {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-right: 12px;
}
.archive-item__title {
    color: var(--text-body);
    font-size: 1.02rem;
    transition: color 0.2s var(--ease);
}
.archive-item:hover .archive-item__title { color: var(--accent); }

/* Infinite-scroll reveal */
.archive-reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.archive-reveal.is-visible {
    opacity: 1;
    transform: none;
}
.archive-sentinel {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 32px 0 16px;
    opacity: 0;
    transition: opacity 0.3s var(--ease);
}
.archive-sentinel.is-active {
    opacity: 1;
}
.archive-sentinel__dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--accent);
    animation: bounce 0.9s ease-in-out infinite;
}
.archive-sentinel__dot:nth-child(2) { animation-delay: 0.15s; }
.archive-sentinel__dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes bounce {
    0%, 100% { transform: translateY(0); opacity: 0.5; }
    50% { transform: translateY(-8px); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
    .archive-reveal { opacity: 1 !important; transform: none !important; }
    .archive-sentinel { display: none; }
}

/* -------- 11. Categories index / Tag cloud -------- */
.cat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}
.cat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 28px 24px;
    backdrop-filter: blur(20px);
    transform-style: preserve-3d;
    transition: all 0.3s var(--ease);
    color: var(--text-body);
    text-align: center;
}
.cat-card:hover {
    border-color: var(--accent);
    background: var(--card-bg-hover);
    box-shadow: 0 12px 36px var(--card-shadow-hover);
    color: var(--text-strong);
    text-shadow: none;
}
.cat-card__name {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.3rem;
    margin: 0 0 8px;
}
.cat-card__count { color: var(--text-faint); font-size: 0.82rem; }
.cat-card.is-active {
    border-color: var(--accent);
    background: var(--card-bg-hover);
    box-shadow: 0 12px 36px var(--card-shadow-hover), inset 0 0 0 1px var(--accent);
    color: var(--text-strong);
}
.cat-card.is-active .cat-card__name {
    background: linear-gradient(135deg, var(--accent-2), var(--accent), var(--accent-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* tag-cloud → use button */
.tag-cloud .tag-btn {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-body);
    transition: all 0.2s var(--ease);
    backdrop-filter: blur(12px);
    font-family: inherit;
    cursor: pointer;
}
.tag-cloud .tag-btn:hover {
    color: #fff;
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    border-color: transparent;
    box-shadow: 0 6px 18px var(--accent-glow);
}
.tag-cloud .tag-btn.is-active {
    color: #fff;
    background: linear-gradient(135deg, var(--accent-2), var(--accent), var(--accent-3));
    border-color: transparent;
    box-shadow: 0 8px 24px var(--accent-glow);
}

/* collection inline detail */
.collection-detail {
    margin-top: 32px;
    min-height: 1px;
}
.collection-panel {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 24px clamp(20px, 4vw, 32px);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    box-shadow: 0 8px 32px var(--card-shadow);
    animation: panel-in 0.4s var(--ease) both;
}
@keyframes panel-in {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: none; }
}
.collection-panel__head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}
.collection-panel__link {
    color: var(--accent-2);
    font-size: 0.86rem;
}
.collection-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 4px;
}
.collection-list li {
    padding: 10px 8px;
    border-radius: var(--radius-sm);
    transition: background 0.15s var(--ease);
}
.collection-list li:hover {
    background: var(--card-bg-hover);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 14px;
    align-items: baseline;
    padding: 16px 0;
}
.tag-cloud a {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-body);
    transition: all 0.2s var(--ease);
    backdrop-filter: blur(12px);
}
.tag-cloud a:hover {
    color: #fff;
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    border-color: transparent;
    text-shadow: none;
    box-shadow: 0 6px 18px var(--accent-glow);
}
.tag-cloud .tag-count {
    margin-left: 8px;
    color: var(--text-faint);
    font-size: 0.78em;
}

.breadcrumb {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}
.breadcrumb a { color: var(--accent-2); }
.breadcrumb span { margin: 0 8px; color: var(--text-faint); }

/* -------- 12. About page -------- */
.about-hero {
    text-align: center;
    padding: 64px 0 48px;
}
.about-hero__avatar {
    width: 144px; height: 144px;
    border-radius: 50%;
    margin: 0 auto 24px;
    border: 3px solid var(--card-border);
    box-shadow: 0 0 40px var(--accent-glow);
    object-fit: cover;
    transition: transform 0.4s var(--ease);
}
.about-hero__avatar:hover { transform: scale(1.05) rotate(-3deg); }
.about-hero__name {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2rem, 4vw, 2.8rem);
    margin: 0;
    background: linear-gradient(135deg, var(--accent-2), var(--accent), var(--accent-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.about-hero__sub { color: var(--text-muted); font-size: 1.1rem; letter-spacing: 3px; margin-top: 8px; }
.about-hero__desc { color: var(--text-body); margin-top: 14px; }

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 48px;
}
.about-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(20px);
    transform-style: preserve-3d;
    transition: all 0.3s var(--ease);
}
.about-card:hover {
    border-color: var(--accent);
    background: var(--card-bg-hover);
    box-shadow: 0 12px 36px var(--card-shadow-hover);
}
.about-card__tag {
    color: var(--accent);
    font-family: 'Orbitron', sans-serif;
    font-size: 0.78rem;
    letter-spacing: 3px;
    text-transform: uppercase;
}
.about-card__title {
    font-size: 1.4rem;
    color: var(--text-strong);
    margin: 8px 0 12px;
}
.about-card__body {
    color: var(--text-body);
    font-size: 0.95rem;
}
.about-card__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 6px;
}
.about-words {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin: 16px 0 48px;
}
.about-words span {
    padding: 6px 18px;
    border: 1px solid var(--card-border);
    border-radius: 999px;
    background: var(--card-bg);
    color: var(--accent);
    font-family: 'Orbitron', sans-serif;
    backdrop-filter: blur(12px);
    transition: all 0.25s var(--ease);
}
.about-words span:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 8px 24px var(--accent-glow); }

/* Featured maxim card */
.about-feature {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 56px clamp(32px, 6vw, 80px);
    margin-bottom: 24px;
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    text-align: center;
    overflow: hidden;
    transform-style: preserve-3d;
    transition: all 0.3s var(--ease);
    box-shadow: 0 8px 32px var(--card-shadow);
}
.about-feature::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, var(--accent-glow), transparent 60%);
    opacity: 0.5;
    pointer-events: none;
}
.about-feature:hover {
    border-color: var(--accent);
    box-shadow: 0 16px 48px var(--card-shadow-hover);
}
.about-feature__quote {
    position: absolute;
    top: -28px; left: 32px;
    font-family: 'Orbitron', serif;
    font-size: 11rem;
    line-height: 1;
    color: var(--accent);
    opacity: 0.18;
    pointer-events: none;
    user-select: none;
}
.about-feature__top {
    font-family: 'Orbitron', 'Exo 2', sans-serif;
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    color: var(--text-strong);
    line-height: 1.4;
    margin-bottom: 8px;
    position: relative;
}
.about-feature__bottom {
    font-family: 'Orbitron', 'Exo 2', sans-serif;
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    background: linear-gradient(135deg, var(--accent-2), var(--accent), var(--accent-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.4;
    position: relative;
}
.about-feature__tag {
    margin-top: 24px;
    font-size: 0.78rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--accent);
    font-family: 'Orbitron', sans-serif;
    position: relative;
}

/* Two-column row for skills + MBTI */
.about-duo {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}
.about-card--accent {
    padding: 32px 28px;
}

/* Stats banner */
.about-stats {
    display: block;
    background: linear-gradient(135deg, rgba(91, 140, 255, 0.18), rgba(178, 102, 255, 0.18), rgba(255, 92, 219, 0.16));
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 28px clamp(24px, 4vw, 40px);
    color: var(--text-body);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    transform-style: preserve-3d;
    transition: all 0.3s var(--ease);
    box-shadow: 0 8px 32px var(--card-shadow);
    margin-bottom: 24px;
}
.about-stats:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 16px 48px var(--card-shadow-hover);
    text-shadow: none;
}
.about-stats__label {
    color: var(--accent);
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 16px;
}
.about-stats__row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    text-align: center;
}
.about-stats__num {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(1.8rem, 4.5vw, 2.8rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-2), var(--accent), var(--accent-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
}
.about-stats__name {
    margin-top: 6px;
    font-size: 0.82rem;
    color: var(--text-muted);
    letter-spacing: 2px;
}

/* -------- 13. Essay -------- */
.essay-grid {
    columns: 320px;
    column-gap: 24px;
}
.essay-item {
    break-inside: avoid;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 20px 22px;
    margin-bottom: 24px;
    backdrop-filter: blur(20px);
    transition: all 0.3s var(--ease);
}
.essay-item:hover {
    border-color: var(--accent);
    background: var(--card-bg-hover);
    box-shadow: 0 12px 36px var(--card-shadow-hover);
    transform: translateY(-3px);
}
.essay-item__content { color: var(--text-body); font-size: 0.96rem; line-height: 1.7; }
.essay-item__images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 6px;
    margin-top: 12px;
}
.essay-item__images img {
    aspect-ratio: 1; object-fit: cover;
    border-radius: var(--radius-sm);
    cursor: zoom-in;
}
.essay-item__meta {
    margin-top: 14px;
    color: var(--text-faint);
    font-size: 0.82rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.essay-item__meta a { color: var(--accent-2); }

/* -------- 14. Link page -------- */
.link-section { margin-bottom: 48px; }
.link-section__title {
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: var(--text-strong);
}
.link-section__title::before {
    content: '';
    display: inline-block;
    width: 6px; height: 22px;
    background: linear-gradient(180deg, var(--accent-2), var(--accent));
    border-radius: 3px;
    vertical-align: -3px;
    margin-right: 10px;
}
.link-section__desc { color: var(--text-muted); font-size: 0.92rem; margin-bottom: 16px; }
.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}
.link-card {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 14px 16px;
    backdrop-filter: blur(18px);
    transition: all 0.25s var(--ease);
    color: var(--text-body);
}
.link-card:hover {
    border-color: var(--accent);
    background: var(--card-bg-hover);
    transform: translateY(-3px);
    box-shadow: 0 12px 32px var(--card-shadow-hover);
    text-shadow: none;
}
.link-card__avatar {
    width: 48px; height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--card-border);
    flex-shrink: 0;
}
.link-card__info { min-width: 0; flex: 1; }
.link-card__name {
    color: var(--text-strong);
    font-weight: 600;
    margin: 0 0 4px;
    font-size: 1rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.link-card__desc {
    color: var(--text-muted);
    font-size: 0.84rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* -------- 15. Music / Contact / 404 -------- */
.simple-page {
    padding: 96px 0 64px;
    text-align: center;
    min-height: calc(100vh - var(--nav-h));
}
.simple-page__title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    background: linear-gradient(135deg, var(--accent-2), var(--accent), var(--accent-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 24px;
}
.simple-page__sub {
    color: var(--text-muted);
    margin-bottom: 36px;
    letter-spacing: 2px;
}
.simple-page__body {
    max-width: var(--reading);
    margin: 0 auto;
    text-align: left;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 32px clamp(20px, 4vw, 40px);
    backdrop-filter: blur(20px);
    color: var(--text-body);
    line-height: 1.85;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    color: #fff !important;
    font-weight: 500;
    box-shadow: 0 8px 24px var(--accent-glow);
    transition: all 0.25s var(--ease);
    border: none;
}
.btn-primary:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
    box-shadow: 0 14px 36px var(--accent-glow);
    text-shadow: none;
}

/* ---------- Poker-card grid (project repos) ---------- */
.poker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 28px 32px;
    padding: 24px 0 48px;
    perspective: 1400px;
}

.poker-card {
    position: relative;
    aspect-ratio: 5 / 7;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    padding: 14px 14px 16px;
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    box-shadow:
        0 12px 36px var(--card-shadow),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    color: var(--text-body);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform-style: preserve-3d;
    transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease), border-color 0.3s var(--ease);
    --lang-color: var(--accent);
}
.poker-card::before {
    content: '';
    position: absolute;
    inset: 6px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    pointer-events: none;
    opacity: 0.6;
}
.poker-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 18px;
    background: radial-gradient(120% 80% at 50% 0%, var(--lang-color), transparent 55%);
    opacity: 0.18;
    pointer-events: none;
    transition: opacity 0.4s var(--ease);
}

/* Initial fan-out (alternating rotation) */
.poker-grid > .poker-card:nth-child(4n+1) { transform: rotate(-1.6deg); }
.poker-grid > .poker-card:nth-child(4n+2) { transform: rotate(0.6deg); }
.poker-grid > .poker-card:nth-child(4n+3) { transform: rotate(-0.4deg); }
.poker-grid > .poker-card:nth-child(4n)   { transform: rotate(1.4deg); }

.poker-card:hover {
    transform: translateY(-14px) rotate(0deg) scale(1.04) !important;
    border-color: var(--lang-color);
    box-shadow:
        0 28px 64px var(--card-shadow-hover),
        0 0 0 1px var(--lang-color),
        0 0 60px var(--lang-color);
    z-index: 5;
}
.poker-card:hover::after { opacity: 0.36; }

.poker-card__corner {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1;
    font-family: 'Orbitron', sans-serif;
    color: var(--lang-color);
    font-size: 0.78rem;
    letter-spacing: 1px;
    z-index: 1;
}
.poker-card__corner--bot {
    align-self: flex-end;
    transform: rotate(180deg);
    margin-top: auto;
}
.poker-card__rank {
    font-weight: 700;
    text-shadow: 0 0 12px var(--lang-color);
}
.poker-card__suit {
    margin-top: 4px;
    opacity: 0.78;
    font-size: 0.74em;
}

.poker-card__center {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -8px 0;
    z-index: 1;
}
.poker-card__symbol {
    font-size: clamp(2.8rem, 7vw, 4.6rem);
    color: var(--lang-color);
    text-shadow:
        0 0 24px var(--lang-color),
        0 0 48px var(--lang-color);
    line-height: 1;
    user-select: none;
    transform: translateZ(20px);
}

.poker-card__body {
    text-align: center;
    z-index: 1;
    margin-top: 4px;
}
.poker-card__name {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.95rem;
    color: var(--text-strong);
    margin: 0 0 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    letter-spacing: 0;
}
.poker-card__desc {
    font-size: 0.76rem;
    color: var(--text-muted);
    line-height: 1.45;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.poker-card__meta {
    margin-top: 8px;
    color: var(--text-faint);
    font-size: 0.72rem;
    letter-spacing: 1px;
}

.poker-card--skeleton {
    pointer-events: none;
    opacity: 0.45;
    animation: shimmer 1.6s ease-in-out infinite;
}
@keyframes shimmer {
    0%, 100% { opacity: 0.35; }
    50% { opacity: 0.7; }
}

@media (prefers-reduced-motion: reduce) {
    .poker-grid > .poker-card { transform: none !important; }
    .poker-card--skeleton { animation: none; }
}

@media (max-width: 480px) {
    .poker-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 20px; }
}

/* Article-level comment block */
.post-comments {
    max-width: var(--reading);
    margin: 64px auto 0;
}
.post-comments__head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}
.post-comments__title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    margin: 0;
    color: var(--text-strong);
}
.post-comments__hint {
    color: var(--text-muted);
    font-size: 0.82rem;
}
.post-comments__hint a { color: var(--accent-2); }

.post-comments .utterances-wrapper {
    margin-top: 0;
}

/* Utterances comments */
.utterances-wrapper {
    max-width: var(--reading);
    margin: 32px auto 0;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 24px clamp(16px, 4vw, 32px);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    box-shadow: 0 8px 32px var(--card-shadow);
    min-height: 200px;
}
.utterances-wrapper .utterances {
    max-width: 100% !important;
}
.utterances-wrapper::before {
    content: '加载评论…';
    display: block;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.88rem;
    padding: 32px 0;
}
.utterances-wrapper:has(.utterances)::before {
    display: none;
}

.error-404 {
    min-height: calc(100vh - var(--nav-h));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 48px 24px;
}
.error-404__num {
    font-family: 'Orbitron', sans-serif;
    font-weight: 800;
    font-size: clamp(7rem, 22vw, 16rem);
    line-height: 1;
    background: linear-gradient(135deg, var(--accent-2) 0%, var(--accent) 50%, var(--accent-3) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 80px var(--accent-glow);
    animation: glitch 4s infinite alternate;
}
@keyframes glitch {
    0%, 80%, 100% { transform: none; filter: none; }
    85% { transform: translate(-2px, 1px); filter: hue-rotate(20deg); }
    90% { transform: translate(3px, -2px); filter: hue-rotate(-30deg); }
}
.error-404__sub {
    color: var(--text-muted);
    margin: 16px 0 36px;
    font-size: 1.05rem;
    letter-spacing: 4px;
}

/* -------- 16. Footer -------- */
.footer {
    background: var(--surface);
    backdrop-filter: blur(22px);
    border-top: 1px solid var(--line);
    padding: 36px 0 28px;
    color: var(--text-muted);
    font-size: 0.88rem;
    text-align: center;
    margin-top: 48px;
}
.footer__inner { display: flex; flex-direction: column; gap: 12px; align-items: center; }
.footer__social { display: flex; gap: 14px; }
.footer__social a {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--text-body);
    transition: all 0.2s var(--ease);
}
.footer__social a:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); text-shadow: none; }
.footer__social svg { width: 18px; height: 18px; }
.footer p { margin: 0; }

/* -------- 17. Search modal -------- */
.search {
    position: fixed; inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 80px 16px 16px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease);
}
.search.is-open { opacity: 1; pointer-events: auto; }
.search__panel {
    width: 100%;
    max-width: 640px;
    background: var(--surface-strong);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    transform: translateY(-12px);
    transition: transform 0.3s var(--ease);
}
.search.is-open .search__panel { transform: none; }
.search__input {
    width: 100%;
    padding: 18px 22px;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--line);
    color: var(--text-strong);
    font-size: 1.1rem;
    outline: none;
}
.search__input::placeholder { color: var(--text-faint); }
.search__results {
    max-height: 60vh;
    overflow-y: auto;
    padding: 8px;
}
.search__result {
    display: block;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-body);
    transition: background 0.15s var(--ease);
}
.search__result:hover { background: var(--card-bg-hover); color: var(--text-strong); text-shadow: none; }
.search__result-title { font-weight: 600; margin-bottom: 4px; }
.search__result-snippet { color: var(--text-muted); font-size: 0.86rem; line-height: 1.5; }
.search__result mark { background: var(--accent-glow); color: var(--text-strong); padding: 0 2px; border-radius: 2px; }
.search__empty { padding: 24px; text-align: center; color: var(--text-muted); }

/* -------- 18. Lightbox -------- */
.lightbox {
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(8px);
    z-index: 10001;
    display: flex; align-items: center; justify-content: center;
    padding: 24px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease);
    cursor: zoom-out;
}
.lightbox.is-open { opacity: 1; pointer-events: auto; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: var(--radius-sm); }

/* -------- 19. Back-top -------- */
.back-top {
    position: fixed;
    bottom: 28px; right: 28px;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    color: #fff;
    box-shadow: 0 8px 24px var(--accent-glow);
    display: inline-flex;
    align-items: center; justify-content: center;
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}
.back-top.is-visible { opacity: 1; pointer-events: auto; transform: none; }
.back-top:hover { transform: translateY(-2px); filter: brightness(1.1); }
.back-top svg { width: 18px; height: 18px; }

/* -------- 20. Responsive tweaks -------- */
@media (max-width: 768px) {
    #cursor-spotlight { display: none; }
    .post-body { padding: 28px 20px; }
    .section { padding: 48px 0; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .post-card__body { padding: 16px 18px 18px; }
    .nav__brand { font-size: 1rem; }
}

/* -------- 21. Reduced motion -------- */
@media (prefers-reduced-motion: reduce) {
    #webgl-fluid-canvas, #cursor-spotlight { display: none !important; }
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
    .post-card, .about-card, .cat-card { transform: none !important; }
}

/* -------- 22. When fluid was destroyed at runtime -------- */
html[data-fluid='off'] body {
    background:
        radial-gradient(ellipse 80% 60% at 20% 8%, var(--bg-2) 0%, transparent 60%),
        radial-gradient(ellipse 70% 50% at 80% 92%, var(--bg-3) 0%, transparent 60%),
        var(--bg-1) !important;
}

/* -------- 23. Vanilla-tilt glare clip -------- */
.js-tilt-glare { border-radius: inherit; overflow: hidden; }
