/* === Tech Effects for Yuxiang MA's Homepage === */
/* Font loaded in head/custom.html — do NOT duplicate with @import here */

:root {
    --accent-cyan: #00b4d8;
    --accent-green: #2ecc71;
    --glow-cyan: rgba(0, 180, 216, 0.3);
    --text-muted: #6c757d;
}

/* ==========================================
   Reduced Motion — disable all animations
   ========================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .typing-cursor { display: none; }
    #particle-canvas, #matrix-canvas { display: none; }
    body.dark-mode .page__content li:hover { transform: none; }
    body.dark-mode .page__content a::after { display: none; }
}

/* ==========================================
   Dark Mode Variables
   ========================================== */
body.dark-mode {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2128;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --border-color: rgba(0, 180, 216, 0.12);
    --link-color: #58a6ff;
}

/* ==========================================
   Masthead / Navigation
   ========================================== */
.masthead {
    background-color: #fafbfc;
    border-bottom: 1px solid #e9ecef;
}

.masthead__menu-item a {
    color: #495057;
    transition: color 0.3s ease, border-color 0.3s ease;
    padding-bottom: 4px;
    border-bottom: 2px solid transparent;
}

.masthead__menu-item a:hover {
    color: var(--accent-cyan);
    border-bottom-color: var(--accent-cyan);
}

.masthead__menu-item.is-active a,
.masthead__menu-item.is-active > a {
    color: var(--accent-cyan);
    font-weight: 600;
    border-bottom-color: var(--accent-cyan);
}

.masthead__menu-item--lg a {
    color: #2c3e50;
    font-weight: 600;
}

.masthead__menu-item--lg.is-active a {
    color: #2c3e50;
}

body.dark-mode .masthead {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: none;
}

body.dark-mode .masthead__menu-item a {
    color: var(--text-secondary);
    border-bottom-color: transparent;
}

body.dark-mode .masthead__menu-item a:hover {
    color: var(--accent-cyan);
    text-shadow: 0 0 8px var(--glow-cyan);
    border-bottom-color: var(--accent-cyan);
}

body.dark-mode .masthead__menu-item.is-active a,
body.dark-mode .masthead__menu-item.is-active > a {
    color: var(--accent-cyan);
    font-weight: 600;
    border-bottom-color: var(--accent-cyan);
    text-shadow: 0 0 8px var(--glow-cyan);
}

body.dark-mode .masthead__menu-item--lg a {
    color: var(--accent-cyan);
}

body.dark-mode .masthead__menu-item--lg.is-active a {
    color: var(--accent-cyan);
}

.greedy-nav {
    background-color: transparent;
}

body.dark-mode .greedy-nav {
    background-color: transparent;
}

/* ==========================================
   Dark Mode - Main content areas
   ========================================== */
body.dark-mode,
body.dark-mode .page,
body.dark-mode .page__inner,
body.dark-mode .sidebar,
body.dark-mode .author__content,
body.dark-mode .author__urls-wrapper,
body.dark-mode .page__hero,
body.dark-mode .page__content,
body.dark-mode .archive,
body.dark-mode .grid__wrapper,
body.dark-mode .grid__item {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

body.dark-mode .sidebar {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
}

body.dark-mode .author__name {
    color: var(--accent-cyan);
    text-shadow: 0 0 10px var(--glow-cyan);
}

body.dark-mode .author__bio,
body.dark-mode .author__location {
    color: var(--text-secondary);
}

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode h4 {
    color: var(--accent-cyan);
    text-shadow: 0 0 6px rgba(0, 180, 216, 0.2);
}

body.dark-mode a {
    color: var(--link-color);
    transition: all 0.3s ease;
}

body.dark-mode a:hover {
    color: var(--accent-cyan);
    text-shadow: 0 0 8px var(--glow-cyan);
}

body.dark-mode p,
body.dark-mode li,
body.dark-mode td,
body.dark-mode th {
    color: var(--text-primary);
}

body.dark-mode code,
body.dark-mode pre {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

body.dark-mode blockquote {
    border-left-color: var(--accent-cyan);
    background-color: rgba(0, 180, 216, 0.05);
}

body.dark-mode .page__footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

body.dark-mode .page__footer-copyright {
    color: var(--text-secondary);
}

body.dark-mode .grid__item:hover,
body.dark-mode article:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 180, 216, 0.1);
}

/* ==========================================
   Avatar — clean in dark mode
   ========================================== */
.author__avatar img {
    border-radius: 50%;
}

body.dark-mode .author__avatar img {
    border: none;
    box-shadow: none;
}

/* ==========================================
   Social Icons — NO bullets
   ========================================== */
.author__urls.social-icons,
.author__urls.social-icons li {
    list-style: none;
    list-style-type: none;
}

.author__urls.social-icons {
    padding-left: 0;
}

.author__urls.social-icons li::before,
.author__urls.social-icons li::marker {
    display: none;
    content: '';
}

.author__urls {
    list-style: none;
}

body.dark-mode .author__urls {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

body.dark-mode .author__urls li {
    list-style: none;
}

body.dark-mode .author__urls li::before {
    display: none;
}

/* ==========================================
   Footer — narrower
   ========================================== */
.page__footer footer {
    padding-top: 1em;
    padding-bottom: 1em;
    margin-top: 1.5em;
}

.page__footer-copyright {
    font-size: 0.72em;
    opacity: 0.6;
    line-height: 1.2;
}

body.dark-mode .page__footer-copyright {
    font-size: 0.72em;
    opacity: 0.4;
}

/* ==========================================
   Grid background for dark mode
   ========================================== */
body.dark-mode::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 180, 216, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 180, 216, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: -1;
    pointer-events: none;
}

/* ==========================================
   Scanline Effect (subtle)
   ========================================== */
body.dark-mode::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.02) 0px,
        rgba(0, 0, 0, 0.02) 1px,
        transparent 1px,
        transparent 3px
    );
    pointer-events: none;
    z-index: 0;
}

/* ==========================================
   Matrix Canvas
   ========================================== */
#matrix-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -3;
    pointer-events: none;
    opacity: 0.05;
}

/* ==========================================
   Particle Canvas
   ========================================== */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
    opacity: 0.35;
}

/* ==========================================
   Sidebar Typing Effect
   ========================================== */
.sidebar-typing {
    margin-top: 8px;
    font-size: 0.82em;
    min-height: 1.4em;
}

#sidebar-typing-text {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-cyan);
}

.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 0.9em;
    background: var(--accent-cyan);
    animation: blink 1s infinite;
    vertical-align: text-bottom;
    margin-left: 2px;
    box-shadow: 0 0 4px var(--glow-cyan);
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ==========================================
   Enhanced Links (dark mode)
   ========================================== */
body.dark-mode .page__content a {
    position: relative;
    transition: all 0.3s ease;
}

body.dark-mode .page__content a::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-cyan);
    box-shadow: 0 0 5px var(--glow-cyan);
    transition: width 0.3s ease;
}

body.dark-mode .page__content a:hover::after {
    width: 100%;
}

body.dark-mode .page__content a:hover {
    text-shadow: 0 0 8px var(--glow-cyan);
}

/* ==========================================
   List hover effect (dark mode)
   ========================================== */
body.dark-mode .page__content li {
    transition: all 0.3s ease;
    padding: 2px 0;
}

body.dark-mode .page__content li:hover {
    transform: translateX(5px);
    color: var(--accent-cyan);
}

/* ==========================================
   Dark Mode Toggle Button
   ========================================== */
.dark-mode-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid #e9ecef;
    background: #fafbfc;
    color: #495057;
    font-size: 1.2em;
    cursor: pointer;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.dark-mode-toggle:hover {
    box-shadow: 0 0 15px var(--glow-cyan);
    transform: scale(1.1);
}

.dark-mode-toggle:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

body.dark-mode .dark-mode-toggle {
    border-color: var(--border-color);
    background: var(--bg-secondary);
    color: var(--accent-cyan);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

/* ==========================================
   Scrollbar (dark mode)
   ========================================== */
body.dark-mode ::-webkit-scrollbar {
    width: 6px;
}

body.dark-mode ::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

body.dark-mode ::-webkit-scrollbar-thumb {
    background: rgba(0, 180, 216, 0.3);
    border-radius: 3px;
}

body.dark-mode ::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 180, 216, 0.5);
}

body.dark-mode ::selection {
    background: rgba(0, 180, 216, 0.25);
    color: #e6edf3;
}

/* ==========================================
   Responsive
   ========================================== */
@media (max-width: 768px) {
    .sidebar-typing {
        font-size: 0.75em;
    }
    .dark-mode-toggle {
        bottom: 15px;
        right: 15px;
        width: 38px;
        height: 38px;
        font-size: 1em;
    }
}