/*
    Theme Name: bybates
    Author: bybates.com
    Version: 0.8.1 - Chinese Optimized
*/

/* Import Material Design Integration */
@import url('css/material-integration.css');

/* Chinese-Optimized Typography Loading */
@font-face {
    font-family: 'Chinese UI';
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@100..900&family=Inter:wght@100..900&display=swap');
}

/* CSS Custom Properties - Chinese-Optimized Design System */
:root {
    /* Colors - Material Design 3 Enhanced */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Brand Colors - Material Design 3 */
    --color-brand: var(--md-sys-color-primary);
    --color-brand-light: color-mix(in srgb, var(--md-sys-color-primary) 70%, white 30%);
    --color-brand-dark: color-mix(in srgb, var(--md-sys-color-primary) 80%, black 20%);
    
    /* Text Colors */
    --color-text-primary: var(--md-sys-color-on-surface);
    --color-text-secondary: var(--md-sys-color-on-surface-variant);
    --color-text-tertiary: color-mix(in srgb, var(--md-sys-color-on-surface) 60%, transparent 40%);
    
    /* Backgrounds */
    --color-bg-primary: var(--md-sys-color-surface);
    --color-bg-secondary: var(--md-sys-color-surface-container-low);
    --color-bg-tertiary: var(--md-sys-color-surface-container);
    
    /* Borders */
    --color-border-light: var(--md-sys-color-outline-variant);
    --color-border-medium: var(--md-sys-color-outline);
    
    /* Chinese-Optimized Typography */
    --font-family-base: "Noto Sans SC", "Chinese UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-family-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
    
    /* Chinese-Optimized Font Sizes */
    --font-size-xs: 0.75rem;     /* 12px */
    --font-size-sm: 0.875rem;    /* 14px */
    --font-size-base: 1rem;      /* 16px - Optimal for Chinese */
    --font-size-lg: 1.125rem;    /* 18px */
    --font-size-xl: 1.25rem;     /* 20px */
    --font-size-2xl: 1.5rem;     /* 24px */
    --font-size-3xl: 2rem;       /* 32px */
    --font-size-4xl: 2.5rem;     /* 40px */
    --font-size-5xl: 3.5rem;     /* 56px */
    
    /* Chinese-Optimized Line Heights */
    --line-height-tight: 1.3;     /* Better for Chinese headings */
    --line-height-snug: 1.4;      /* Chinese subheadings */
    --line-height-normal: 1.6;    /* Chinese body text */
    --line-height-relaxed: 1.8;   /* Chinese reading content */
    --line-height-loose: 2;
    
    /* Material Design 8pt Grid System */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    
    /* Layout Containers */
    --content-width: 900px;
    --narrow-width: 768px;
    --wide-width: 1200px;

    /* Table of Contents Liquid Glass Variables */
    --glass-bg-regular: rgba(255, 255, 255, 0.15);
    --glass-bg-clear: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow-light: rgba(0, 0, 0, 0.1);
    --glass-shadow-medium: rgba(0, 0, 0, 0.15);
    --glass-blur-subtle: 8px;
    --glass-blur-medium: 12px;
    --glass-blur-heavy: 20px;
    --glass-transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --glass-hover-transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Modern CSS Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    line-height: var(--line-height-normal);
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
    font-feature-settings: "kern" 1;
    font-optical-sizing: auto;
    /* Chinese text optimization */
    -webkit-font-smoothing: subpixel-antialiased;
    text-rendering: geometricPrecision;
}

/* ==========================================
   TYPOGRAPHY - Chinese Optimized
   ========================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
    margin: 0;
    font-feature-settings: "kern" 1;
    /* Chinese character optimization */
    letter-spacing: 0.01em;
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-top: var(--space-8);
    margin-bottom: var(--space-4);
}

h1:first-child { margin-top: 0; }

h2 {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
}

h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
}

h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-top: var(--space-6);
    margin-bottom: var(--space-2);
}

h5 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-top: var(--space-5);
    margin-bottom: var(--space-2);
}

h6 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-top: var(--space-4);
    margin-bottom: var(--space-2);
}

/* Chinese-Optimized Text Elements */
p {
    margin-bottom: var(--space-4);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    /* Chinese text spacing */
    word-spacing: 0.05em;
}

p:last-child { margin-bottom: 0; }
h1 + p, h2 + p, h3 + p, h4 + p, h5 + p, h6 + p { margin-top: 0; }

strong, b {
    font-weight: 600;
    color: var(--color-text-primary);
}

em, i { font-style: italic; }

a {
    color: var(--color-brand);
    text-decoration: none;
    transition: all 0.2s ease;
}

a:hover {
    color: var(--color-brand-dark);
    text-decoration: underline;
    text-decoration-color: var(--color-brand-light);
    text-underline-offset: 0.25rem;
}

/* Lists - Chinese Optimized */
ul, ol {
    margin-bottom: var(--space-3);
    padding-left: var(--space-5);
}

ul { list-style-type: disc; }
ol { list-style-type: decimal; }

li {
    margin-bottom: var(--space-1);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

li:last-child { margin-bottom: 0; }
li > ul, li > ol {
    margin-top: var(--space-1);
    margin-bottom: var(--space-1);
}

/* Blockquotes */
blockquote {
    margin: var(--space-4) 0;
    padding: var(--space-3) var(--space-4);
    border-left: 4px solid var(--color-brand);
    background: var(--color-bg-secondary);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--color-text-secondary);
    font-style: italic;
    line-height: var(--line-height-relaxed);
}

blockquote p:last-child { margin-bottom: 0; }

/* Code */
code {
    font-family: var(--font-family-mono);
    font-size: 0.9em;
    background: var(--color-bg-secondary);
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
    color: var(--color-text-primary);
}

pre {
    background: var(--color-bg-secondary);
    border-radius: var(--radius);
    padding: var(--space-4);
    overflow-x: auto;
    margin: var(--space-4) 0;
    border: 1px solid var(--color-border-light);
}

pre code {
    background: none;
    padding: 0;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
}

/* ==========================================
   LAYOUT COMPONENTS
   ========================================== */

/* Header */
.site-header {
    background: var(--md-sys-color-surface);
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    box-shadow: var(--md-sys-elevation-level1);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.header-content {
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-8);
}

.site-branding {
    flex-shrink: 0;
}

.site-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
    line-height: 1;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.site-title a {
    color: var(--color-text-primary);
    text-decoration: none;
}

.site-title a:hover {
    color: var(--color-brand);
}

.site-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--space-1);
    margin-bottom: 0;
}

/* Navigation */
.main-navigation {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-menu {
    display: flex;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
}

.nav-menu li {
    margin: 0;
    flex-shrink: 0;
}

.nav-menu a {
    background: transparent;
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 12px var(--space-5);
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
    font-family: var(--md-sys-typescale-label-large-font);
    font-size: var(--md-sys-typescale-label-large-size);
    font-weight: var(--md-sys-typescale-label-large-weight);
    line-height: var(--md-sys-typescale-label-large-line-height);
    color: var(--md-sys-color-on-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    text-decoration: none;
    min-height: 44px;
}

.nav-menu a:hover {
    background: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent 92%);
    border-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-primary);
    transform: translateY(-1px);
    box-shadow: var(--md-sys-elevation-level2);
}

.nav-menu a.active {
    background: color-mix(in srgb, var(--md-sys-color-primary) 12%, transparent 88%);
    border-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-primary);
    box-shadow: var(--md-sys-elevation-level2);
}

/* Social Links */
.social-links {
    display: flex;
    gap: var(--space-3);
    flex-shrink: 0;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--md-sys-shape-corner-large);
    background: var(--md-sys-color-surface-container);
    border: 1px solid var(--md-sys-color-outline-variant);
    color: var(--md-sys-color-on-surface);
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
    box-shadow: var(--md-sys-elevation-level1);
}

.social-links a:hover {
    background: color-mix(in srgb, var(--md-sys-color-primary) 8%, var(--md-sys-color-surface-container) 92%);
    border-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-primary);
    transform: translateY(-1px);
    box-shadow: var(--md-sys-elevation-level2);
}

/* Main Content */
.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--space-8) var(--space-8);
}

/* Home page container with more side spacing */
.home .container,
.category .container,
.tag .container,
.archive .container {
    max-width: var(--wide-width);
    padding: var(--space-8) var(--space-12);
}

/* Post Grid - Responsive Layout */
.post-grid,
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-16);
}

/* Responsive grid adjustments for better layout */
@media (min-width: 600px) {
    .post-grid,
    .posts-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
}

@media (min-width: 900px) {
    .post-grid,
    .posts-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-8);
    }
}

@media (min-width: 1400px) {
    .post-grid,
    .posts-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-8);
    }
}

.post-card {
    background: var(--md-sys-color-surface-container-low);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-extra-large);
    overflow: hidden;
    transition: all var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized);
    box-shadow: var(--md-sys-elevation-level1);
    position: relative;
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 100%;
}

.post-card:hover {
    border-color: var(--md-sys-color-outline);
    transform: translateY(-4px);
    box-shadow: var(--md-sys-elevation-level3);
}

.post-card-content {
    position: relative;
    z-index: 2;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.post-card h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-3);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
    font-weight: 700;
    letter-spacing: 0.01em;
}

.post-card h2 a {
    color: inherit;
    text-decoration: none;
}

.post-card h2 a:hover {
    color: var(--color-brand);
    text-decoration: none;
}

.post-excerpt {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-4);
    font-size: var(--font-size-lg);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.post-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.post-meta i {
    font-size: 0.875em;
    color: var(--color-brand);
}

/* ==========================================
   SINGLE POST LAYOUT
   ========================================== */

.post-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-12);
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
    align-items: start;
    padding-right: 340px; /* Make space for fixed TOC */
}

.single-post-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--space-12);
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
    align-items: start;
}

.post-hero {
    display: flex;
    flex-direction: column;
    text-align: center;
    padding: var(--space-12) var(--space-8);
    background: transparent;
    margin-bottom: var(--space-16);
}

.post-hero .post-title {
    font-family: var(--md-sys-typescale-display-small-font);
    font-size: var(--md-sys-typescale-display-small-size);
    font-weight: var(--md-sys-typescale-display-small-weight);
    line-height: var(--md-sys-typescale-display-small-line-height);
    color: var(--md-sys-color-on-surface);
    margin-bottom: var(--space-8);
    letter-spacing: 0.01em;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.post-meta-single {
    display: flex;
    gap: var(--space-4);
    margin-top: 0;
    flex-wrap: wrap;
    justify-content: center;
}

.post-meta-single span {
    background: var(--md-sys-color-surface-container);
    border: 1px solid var(--md-sys-color-outline-variant);
    padding: 10px 20px;
    border-radius: var(--md-sys-shape-corner-large);
    font-family: var(--md-sys-typescale-label-large-font);
    font-size: var(--md-sys-typescale-label-large-size);
    font-weight: var(--md-sys-typescale-label-large-weight);
    line-height: var(--md-sys-typescale-label-large-line-height);
    color: var(--md-sys-color-on-surface-variant);
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
    box-shadow: var(--md-sys-elevation-level1);
}

.post-meta-single span:hover {
    transform: translateY(-1px);
    box-shadow: var(--md-sys-elevation-level2);
}

/* Post Content - Chinese Optimized */
.post-content {
    max-width: var(--content-width);
    margin: 0 auto;
    line-height: 1.7; /* Comfortable reading line height for mixed content */
    padding: 0 var(--space-4);
}

.post-content p {
    font-size: var(--font-size-base); /* Reverted to 16px for better Chinese character readability */
    line-height: 1.7; /* Reverted to previous comfortable line height */
    margin-bottom: var(--space-4);
    /* Chinese text optimization */
    word-spacing: 0.05em;
    letter-spacing: 0.01em;
}

.post-content h1,
.post-content h2,
.post-content h3 {
    color: var(--md-sys-color-on-surface);
    margin-top: var(--space-8);
    margin-bottom: var(--space-4);
}

.post-content h1 {
    font-family: var(--md-sys-typescale-headline-large-font);
    font-size: var(--md-sys-typescale-headline-large-size);
    font-weight: var(--md-sys-typescale-headline-large-weight);
    line-height: var(--md-sys-typescale-headline-large-line-height);
}

.post-content h2 {
    font-family: var(--md-sys-typescale-headline-medium-font);
    font-size: var(--md-sys-typescale-headline-medium-size);
    font-weight: var(--md-sys-typescale-headline-medium-weight);
    line-height: var(--md-sys-typescale-headline-medium-line-height);
}

.post-content h3 {
    font-family: var(--md-sys-typescale-headline-small-font);
    font-size: var(--md-sys-typescale-headline-small-size);
    font-weight: var(--md-sys-typescale-headline-small-weight);
    line-height: var(--md-sys-typescale-headline-small-line-height);
}

/* ==========================================
   TABLE OF CONTENTS - LIQUID GLASS PRESERVED
   ========================================== */

.table-of-contents {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.25) 0%, 
        rgba(255, 255, 255, 0.15) 100%);
    backdrop-filter: blur(var(--glass-blur-medium)) saturate(1.3);
    -webkit-backdrop-filter: blur(var(--glass-blur-medium)) saturate(1.3);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    padding: var(--space-4);
    position: fixed;
    top: 120px;
    right: 32px;
    width: 280px;
    max-height: calc(100vh - 180px);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.08),
        0 4px 16px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
    transition: var(--glass-transition);
    z-index: 50;
}

/* Liquid Glass Animation for TOC */
.table-of-contents::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        transparent 0deg,
        rgba(255, 255, 255, 0.08) 45deg,
        transparent 90deg,
        rgba(255, 255, 255, 0.05) 135deg,
        transparent 180deg,
        rgba(255, 255, 255, 0.06) 225deg,
        transparent 270deg,
        rgba(255, 255, 255, 0.04) 315deg,
        transparent 360deg
    );
    z-index: 1;
    pointer-events: none;
    animation: liquidRotate 20s linear infinite;
    opacity: 0.8;
}

.table-of-contents:hover::before {
    animation: liquidRotate 12s linear infinite;
    opacity: 1;
}

.toc-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
    text-align: center;
    border-bottom: 2px solid var(--color-brand);
    padding-bottom: var(--space-1);
    flex-shrink: 0;
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    overflow-y: auto;
    flex: 1;
    padding-right: 6px;
    scrollbar-width: thin;
    scrollbar-color: rgba(211, 47, 47, 0.3) rgba(255, 255, 255, 0.1);
}

.toc-list::-webkit-scrollbar {
    width: 4px;
}

.toc-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
}

.toc-list::-webkit-scrollbar-thumb {
    background: rgba(211, 47, 47, 0.3);
    border-radius: 2px;
    transition: background 0.2s ease;
}

.toc-list::-webkit-scrollbar-thumb:hover {
    background: rgba(211, 47, 47, 0.5);
}

.table-of-contents::after {
    content: '';
    position: absolute;
    bottom: var(--space-3);
    left: 0;
    right: 0;
    height: 15px;
    background: linear-gradient(transparent, rgba(255, 255, 255, 0.3));
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.table-of-contents.scrollable::after {
    opacity: 1;
}

.toc-list li {
    margin: 3px 0;
}

.toc-link {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.12) 0%, 
        rgba(255, 255, 255, 0.06) 100%);
    backdrop-filter: blur(var(--glass-blur-subtle));
    -webkit-backdrop-filter: blur(var(--glass-blur-subtle));
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    padding: 8px var(--space-3);
    transition: var(--glass-hover-transition);
    position: relative;
    overflow: hidden;
    display: block;
    text-decoration: none;
    font-size: var(--font-size-sm) !important;
    line-height: 1.4;
    white-space: nowrap;
    text-overflow: ellipsis;
    max-width: 100%;
    font-weight: 500 !important;
    color: var(--color-text-primary);
}

.toc-link[href*="#"],
.toc-link h1, .toc-link h2, .toc-link h3,
.toc-link h4, .toc-link h5, .toc-link h6 {
    font-size: var(--font-size-sm) !important;
    font-weight: 500 !important;
    margin: 0 !important;
    padding: 0 !important;
}

.toc-link:hover {
    background: linear-gradient(135deg, 
        rgba(211, 47, 47, 0.15) 0%, 
        rgba(211, 47, 47, 0.08) 100%);
    backdrop-filter: blur(var(--glass-blur-medium)) saturate(1.4);
    -webkit-backdrop-filter: blur(var(--glass-blur-medium)) saturate(1.4);
    border-color: rgba(211, 47, 47, 0.2);
    transform: translateX(4px);
    box-shadow: 
        0 4px 16px rgba(211, 47, 47, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.toc-link.active {
    background: linear-gradient(135deg, 
        rgba(211, 47, 47, 0.2) 0%, 
        rgba(211, 47, 47, 0.12) 100%);
    border-color: rgba(211, 47, 47, 0.3);
    color: #d32f2f;
    transform: translateX(2px);
}

@keyframes liquidRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==========================================
   POST TAGS & FORMS
   ========================================== */

.post-tags {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--md-sys-color-outline-variant);
}

.post-tags h4 {
    margin-bottom: var(--space-3);
    font-family: var(--md-sys-typescale-title-small-font);
    font-size: var(--md-sys-typescale-title-small-size);
    font-weight: var(--md-sys-typescale-title-small-weight);
    line-height: var(--md-sys-typescale-title-small-line-height);
    color: var(--md-sys-color-on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.post-tags a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--md-sys-color-surface-container);
    color: var(--md-sys-color-on-surface);
    padding: 6px var(--space-3);
    border-radius: var(--md-sys-shape-corner-small);
    font-family: var(--md-sys-typescale-label-large-font);
    font-size: var(--md-sys-typescale-label-large-size);
    font-weight: var(--md-sys-typescale-label-large-weight);
    line-height: var(--md-sys-typescale-label-large-line-height);
    text-decoration: none;
    margin-right: var(--space-2);
    margin-bottom: var(--space-2);
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
    border: 1px solid var(--md-sys-color-outline);
    box-shadow: var(--md-sys-elevation-level1);
}

.post-tags a:hover {
    background: color-mix(in srgb, var(--md-sys-color-primary) 8%, var(--md-sys-color-surface-container) 92%);
    color: var(--md-sys-color-primary);
    border-color: var(--md-sys-color-primary);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--md-sys-elevation-level2);
}

/* Comments Section - Centered Layout */
.comments-wrapper {
    max-width: var(--content-width);
    margin: var(--space-16) auto 0;
    padding: 0 var(--space-4);
}

.comments-area {
    margin-top: var(--space-8);
    padding: var(--space-6) 0;
    border-top: 1px solid var(--color-border-light);
}

.comments-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-6);
    color: var(--color-text-primary);
    border-bottom: 2px solid var(--color-brand);
    padding-bottom: var(--space-3);
    display: inline-block;
}

.comment-form {
    margin-top: var(--space-8);
    padding: var(--space-8);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--md-sys-shape-corner-large);
    box-shadow: var(--md-sys-elevation-level1);
}

.comment-form h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-6);
    color: var(--color-text-primary);
    border-bottom: 2px solid var(--color-border-light);
    padding-bottom: var(--space-3);
}

/* Form Styling */
.form-field {
    margin-bottom: var(--space-6);
    position: relative;
}

.form-field label {
    display: block;
    font-family: var(--md-sys-typescale-body-medium-font);
    font-size: var(--md-sys-typescale-body-medium-size);
    font-weight: var(--md-sys-typescale-body-medium-weight);
    line-height: var(--md-sys-typescale-body-medium-line-height);
    margin-bottom: var(--space-2);
    color: var(--md-sys-color-on-surface);
}

.form-field input,
.form-field textarea {
    width: 100%;
    padding: 16px var(--space-4);
    border: 1px solid var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-corner-extra-small);
    background: var(--md-sys-color-surface-container-low);
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
    font-family: var(--md-sys-typescale-body-large-font);
    font-size: var(--md-sys-typescale-body-large-size);
    font-weight: var(--md-sys-typescale-body-large-weight);
    line-height: var(--md-sys-typescale-body-large-line-height);
    color: var(--md-sys-color-on-surface);
    box-shadow: var(--md-sys-elevation-level1);
}

.form-field input:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--md-sys-color-primary);
    border-width: 2px;
    background: var(--md-sys-color-surface-container);
    box-shadow: 
        0 0 0 3px rgba(var(--md-sys-color-primary), 0.12),
        var(--md-sys-elevation-level2);
}

.submit-btn {
    all: unset;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--md-sys-color-primary);
    border: none;
    color: var(--md-sys-color-on-primary);
    padding: 16px var(--space-8);
    min-height: 48px;
    border-radius: var(--md-sys-shape-corner-large);
    font-family: var(--md-sys-typescale-label-large-font);
    font-size: var(--md-sys-typescale-label-large-size);
    font-weight: var(--md-sys-typescale-label-large-weight);
    line-height: var(--md-sys-typescale-label-large-line-height);
    cursor: pointer;
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized);
    box-shadow: var(--md-sys-elevation-level1);
}

.submit-btn:hover {
    background: color-mix(in srgb, var(--md-sys-color-primary) 85%, white 15%);
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-level3);
}

.submit-btn:active {
    box-shadow: var(--md-sys-elevation-level2);
}

/* ==========================================
   FOOTER
   ========================================== */

.site-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-light);
    padding: var(--space-12) 0 var(--space-8);
    margin-top: var(--space-16);
    color: var(--color-text-secondary);
}

.footer-content {
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    text-align: left;
}

.footer-nav,
.footer-recent {
    min-width: 0;
}

.footer-nav h3,
.footer-recent h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
    border-bottom: 2px solid var(--color-brand);
    padding-bottom: var(--space-2);
    display: inline-block;
}

.footer-nav ul,
.footer-recent ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.footer-nav li,
.footer-recent li {
    margin-bottom: var(--space-2);
}

.footer-nav li:last-child,
.footer-recent li:last-child {
    margin-bottom: 0;
}

.footer-nav a,
.footer-recent a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    line-height: var(--line-height-relaxed);
}

.footer-nav a:hover,
.footer-recent a:hover {
    color: var(--color-brand);
    text-decoration: none;
}

.footer-bottom {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border-light);
    text-align: center;
    grid-column: 1 / -1;
}

.footer-bottom p,
.footer-bottom a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ==========================================
   RESPONSIVE DESIGN - CONSOLIDATED
   ========================================== */

/* Large Tablets and Small Desktops */
@media (max-width: 1023px) {
    .post-layout,
    .single-post-layout {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        padding: var(--space-6) var(--space-4);
        padding-right: var(--space-4); /* Remove TOC space on mobile */
    }
    
    .post-sidebar,
    .table-of-contents {
        display: none !important;
    }
    
    .post-grid,
    .posts-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
}

/* Tablets */
@media (max-width: 768px) {
    .header-content {
        padding: var(--space-3) var(--space-4);
        gap: var(--space-4);
        flex-direction: column;
        text-align: center;
    }
    
    .nav-menu {
        gap: var(--space-2);
        flex-wrap: wrap;
        justify-content: center;
        order: 2;
    }
    
    .nav-menu a {
        padding: 8px var(--space-3);
        min-height: 40px;
        font-size: var(--font-size-sm);
    }
    
    .social-links {
        order: 3;
    }
    
    .post-grid,
    .posts-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .post-card {
        padding: var(--space-5);
    }
    
    .post-card h2 {
        font-size: var(--font-size-xl);
    }
    
    .post-hero {
        padding: var(--space-8) var(--space-4);
        margin-bottom: var(--space-12);
    }
    
    .container {
        padding: var(--space-6) var(--space-4);
    }
    
    .home .container,
    .category .container,
    .tag .container,
    .archive .container {
        padding: var(--space-6) var(--space-6);
    }
    
    /* Typography adjustments for mobile Chinese */
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
}

/* Mobile Phones */
@media (max-width: 480px) {
    .header-content {
        padding: var(--space-2) var(--space-3);
        gap: var(--space-3);
    }
    
    .nav-menu a {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-size-sm);
    }
    
    .post-card {
        padding: var(--space-4);
    }
    
    .container {
        padding: var(--space-4) var(--space-3);
    }
    
    .home .container,
    .category .container,
    .tag .container,
    .archive .container {
        padding: var(--space-4) var(--space-4);
    }
    
    .post-hero {
        padding: var(--space-6) var(--space-3);
    }
    
    .post-content {
        padding: 0 var(--space-2);
    }
}

/* Print Styles */
@media print {
    .site-header,
    .social-links,
    .table-of-contents,
    .post-tags {
        display: none;
    }
    
    .single-post-layout {
        grid-template-columns: 1fr;
        max-width: none;
        padding: 0;
    }
    
    .post-content {
        max-width: none;
        padding: 0;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (prefers-contrast: high) {
    :root {
        --color-border-light: #333333;
        --color-border-medium: #000000;
    }
}