/* ============================================
   Letters to Syunjyu - Ghost Theme
   清新简洁的信件风格主题
   ============================================ */

/* CSS Variables */
:root {
    --accent-color: #8B7355;
    --letter-paper: #FDF8F3;
    --text-primary: #2C2416;
    --text-secondary: #6B5D4D;
    --text-muted: #9A8B7A;
    --border-color: #E8DFD4;
    --bg-color: #F5F0EA;
    --bg-pattern: #EDE6DD;
    --shadow-soft: 0 2px 20px rgba(139, 115, 85, 0.08);
    --shadow-medium: 0 4px 30px rgba(139, 115, 85, 0.12);
    --shadow-lifted: 0 8px 40px rgba(139, 115, 85, 0.15);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --font-serif: 'Noto Serif SC', 'EB Garamond', Georgia, serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --max-width: 720px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-serif);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(139, 115, 85, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 115, 85, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(139, 115, 85, 0.02) 0%, transparent 50%);
    min-height: 100vh;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--text-primary);
}

img {
    max-width: 100%;
    height: auto;
}

/* Site Wrapper */
.site-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-main {
    flex: 1;
    padding: 2rem 1rem;
}

/* ============================================
   Header
   ============================================ */
.site-header {
    padding: 1.5rem 2rem;
    padding-top: calc(1.5rem + env(safe-area-inset-top, 0px));
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    flex-shrink: 0;
}

.site-logo svg {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.site-logo img {
    height: 28px;
    width: auto;
}

.site-logo-text {
    letter-spacing: 0.02em;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding-left: 1.5rem;
    border-left: 1px solid var(--border-color);
}

.nav-link,
.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after,
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-color);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.nav-link:hover::after,
.nav-links a:hover::after,
.nav-link.active::after,
.nav-links a.nav-current::after {
    transform: scaleX(1);
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.2s ease;
}

.nav-link:hover,
.nav-links a:hover {
    color: var(--accent-color);
}

/* Ghost navigation menu */
.gh-navigation,
.site-nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.gh-navigation li {
    list-style: none;
}

.site-nav-menu .nav-item,
.gh-navigation a {
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: 0.5rem 0;
    position: relative;
    display: inline-block;
    text-decoration: none;
}

.site-nav-menu .nav-item::after,
.gh-navigation a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-color);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.site-nav-menu .nav-item:hover::after,
.site-nav-menu .nav-item.active::after {
    transform: scaleX(1);
}

.site-nav-menu .nav-item:hover {
    color: var(--text-primary);
}

/* 当前用户显示 */
.nav-user {
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 500;
    white-space: nowrap;
}

/* 登出按钮 */
.nav-logout {
    margin-left: 0.75rem;
    padding: 0.35rem 0.8rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-serif);
}

.nav-logout:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* ============================================
   Notification System
   ============================================ */
.notification-wrapper {
    position: relative;
    margin-right: 0.5rem;
}

.notification-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.notification-btn:hover {
    background: rgba(139, 115, 85, 0.1);
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: #e74c3c;
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.notification-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 320px;
    max-height: 400px;
    background: var(--letter-paper);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-medium);
    overflow: hidden;
    z-index: 1000;
}

.notification-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(139, 115, 85, 0.05);
}

.notification-header span {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.mark-all-read {
    font-size: 0.8rem;
    color: var(--accent-color);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    font-family: var(--font-serif);
}

.mark-all-read:hover {
    text-decoration: underline;
}

.notification-list {
    max-height: 340px;
    overflow-y: auto;
}

.notification-empty {
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
}

.notification-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.notification-item:last-child {
    border-bottom: none;
}

.notification-item:hover {
    background: rgba(139, 115, 85, 0.05);
}

.notification-item.unread {
    background: rgba(139, 115, 85, 0.08);
}

.notification-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.notification-avatar.syunjyu {
    background: linear-gradient(135deg, #fce4ec, #f8bbd9);
}

.notification-avatar.fei {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
}

.notification-content {
    flex: 1;
    min-width: 0;
}

.notification-message {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 0.25rem;
}

.notification-type {
    display: inline-block;
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    margin-left: 0.35rem;
    vertical-align: middle;
}

.notification-type.update {
    background: #e8f5e9;
    color: #2e7d32;
}

.notification-type.request {
    background: #fff3e0;
    color: #e65100;
}

.notification-item.changelog .notification-avatar {
    background: rgba(139, 115, 85, 0.12);
    color: var(--accent-color);
}

.notification-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Mobile responsive */
@media (max-width: 480px) {
    .notification-dropdown {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-height: 60vh;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }
}

/* ============================================
   Letters Container (Index Page)
   ============================================ */
.letters-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 0;
}

.letters-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
}

.envelope-icon {
    position: relative;
    width: 100px;
    height: 85px;
    margin: 0 auto 1.5rem;
    color: var(--accent-color);
    animation: float 3s ease-in-out infinite;
}

.envelope-icon svg {
    width: 100%;
    height: 100%;
}

.envelope-heart {
    animation: heartPulse 1.5s ease-in-out infinite;
    transform-origin: center;
}

.envelope-heart-outline {
    animation: heartPulse 1.5s ease-in-out infinite;
    transform-origin: center;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes heartPulse {
    0%, 100% { 
        opacity: 0.25;
        transform: scale(1);
    }
    50% { 
        opacity: 0.4;
        transform: scale(1.05);
    }
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.letters-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 0.75rem;
    letter-spacing: 0.05em;
}

.letters-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================
   Slogan Carousel
   ============================================ */
.slogan-carousel {
    width: 100%;
    max-width: 520px;
    margin: 1rem auto 1.25rem;
    height: 2rem;
    overflow: hidden;
    position: relative;
}

.slogan-track {
    display: flex;
    flex-direction: column;
}

.slogan-item {
    height: 2rem;
    line-height: 2rem;
    margin: 0;
    padding: 0 1rem;
    font-family: 'EB Garamond', Georgia, serif;
    font-size: 1.1rem;
    font-style: italic;
    color: var(--accent-color);
    text-align: center;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(8px);
    letter-spacing: 0.02em;
}

@media (max-width: 600px) {
    .slogan-carousel {
        max-width: 100%;
    }
    
    .slogan-item {
        font-size: 0.95rem;
        white-space: normal;
        height: auto;
        min-height: 2rem;
        line-height: 1.5;
    }
}

/* Letter Cards */
.letters-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.letter-card {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.letter-card:nth-child(1) { animation-delay: 0.1s; }
.letter-card:nth-child(2) { animation-delay: 0.2s; }
.letter-card:nth-child(3) { animation-delay: 0.3s; }
.letter-card:nth-child(4) { animation-delay: 0.4s; }
.letter-card:nth-child(5) { animation-delay: 0.5s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.letter-paper {
    background: var(--letter-paper);
    border-radius: var(--radius-lg);
    padding: 2rem 2.5rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color);
    position: relative;
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.letter-paper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 2rem;
    right: 2rem;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.letter-card:hover .letter-paper {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

.letter-card:hover .letter-paper::before {
    opacity: 0.5;
}

.letter-date {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.letter-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    margin: 0 0 1rem;
    line-height: 1.4;
}

.letter-title a {
    color: var(--text-primary);
}

.letter-title a:hover {
    color: var(--accent-color);
}

.letter-excerpt {
    color: var(--text-secondary);
    margin: 0 0 1.25rem;
    line-height: 1.75;
}

.letter-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.letter-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.author-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: var(--accent-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 500;
}

.letter-tag a {
    background: rgba(139, 115, 85, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--accent-color);
}

.letter-read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--accent-color);
    font-weight: 500;
}

.letter-read-more svg {
    transition: transform var(--transition-fast);
}

.letter-read-more:hover svg {
    transform: translateX(4px);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
    padding: 1.5rem;
}

.pagination-prev,
.pagination-next {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.pagination-prev:hover,
.pagination-next:hover {
    color: var(--accent-color);
}

.pagination-info {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================
   Single Post (Letter Full)
   ============================================ */
.letter-full {
    max-width: var(--max-width);
    margin: 0 auto;
}

.letter-full-paper {
    background: var(--letter-paper);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-medium);
    border: 1px solid var(--border-color);
    position: relative;
}

/* Decorative lines like ruled paper - removed for cleaner look */
.letter-full-paper::before {
    display: none;
        var(--border-color) calc(1.75rem + 1px)
    );
    opacity: 0.4;
    pointer-events: none;
    z-index: 0;
}

.letter-full-header {
    position: relative;
    z-index: 1;
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.letter-stamp {
    position: absolute;
    top: -1rem;
    right: -0.5rem;
    width: 90px;
    height: 90px;
    color: #c0392b;
    opacity: 0.75;
    transform: rotate(-18deg);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    filter: saturate(0.8);
}

.letter-stamp:hover {
    opacity: 0.9;
    transform: rotate(-15deg) scale(1.08);
}

.letter-stamp svg {
    width: 100%;
    height: 100%;
}

.letter-stamp svg text {
    text-transform: uppercase;
}

.letter-full-date {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.letter-full-title {
    font-family: var(--font-serif);
    font-size: 2.25rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 1rem;
    line-height: 1.3;
}

.letter-full-tags {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.letter-full-tags .tag {
    background: rgba(139, 115, 85, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--accent-color);
}

.letter-full-image {
    margin: 0 -1rem 2rem;
    position: relative;
    z-index: 1;
}

.letter-full-image img {
    width: 100%;
    border-radius: var(--radius-md);
}

.letter-full-image figcaption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
}

/* Content Styles */
.letter-full-content {
    position: relative;
    z-index: 1;
}

.gh-content {
    font-size: 1.1rem;
    line-height: 1.9;
}

.gh-content > * + * {
    margin-top: 1.5rem;
}

.gh-content p {
    margin: 0;
}

.gh-content h2 {
    font-size: 1.5rem;
    font-weight: 500;
    margin-top: 2.5rem;
    color: var(--text-primary);
}

.gh-content h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-top: 2rem;
}

.gh-content blockquote {
    margin: 2rem 0;
    padding: 1rem 1.5rem;
    border-left: 3px solid var(--accent-color);
    background: rgba(139, 115, 85, 0.05);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.gh-content ul,
.gh-content ol {
    padding-left: 1.5rem;
}

.gh-content li + li {
    margin-top: 0.5rem;
}

.gh-content a {
    color: var(--accent-color);
    text-decoration: underline;
    text-decoration-color: rgba(139, 115, 85, 0.3);
    text-underline-offset: 2px;
}

.gh-content a:hover {
    text-decoration-color: var(--accent-color);
}

.gh-content img {
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
}

.gh-content code {
    background: rgba(139, 115, 85, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

.gh-content pre {
    background: var(--text-primary);
    color: var(--letter-paper);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
}

.gh-content pre code {
    background: none;
    padding: 0;
}

/* ============================================
   Ghost Editor Card Styles (kg-*)
   ============================================ */

/* Width Classes - Required by Ghost */
.kg-width-wide {
    position: relative;
    width: calc(100% + 4rem);
    margin-left: -2rem;
    margin-right: -2rem;
}

.kg-width-full {
    position: relative;
    width: calc(100% + 6rem);
    margin-left: -3rem;
    margin-right: -3rem;
}

@media (max-width: 768px) {
    .kg-width-wide {
        width: calc(100% + 3rem);
        margin-left: -1.5rem;
        margin-right: -1.5rem;
    }
    
    .kg-width-full {
        width: calc(100% + 3rem);
        margin-left: -1.5rem;
        margin-right: -1.5rem;
    }
}

/* Image Card */
.kg-image-card {
    margin: 2rem 0;
}

.kg-image-card img {
    margin: 0;
}

.kg-image-card figcaption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    padding: 0 1rem;
}

/* Gallery Card */
.kg-gallery-card {
    margin: 2rem 0;
}

.kg-gallery-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.kg-gallery-row {
    display: flex;
    gap: 0.75rem;
}

.kg-gallery-row img {
    flex: 1;
    height: 100%;
    object-fit: cover;
    margin: 0;
}

/* Gallery Image - Required by Ghost */
.kg-gallery-image {
    position: relative;
    flex: 1 1 0%;
    margin: 0;
}

.kg-gallery-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Bookmark Card */
.kg-bookmark-card {
    margin: 2rem 0;
}

.kg-bookmark-container {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--letter-paper);
    text-decoration: none;
}

.kg-bookmark-content {
    flex: 1;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
}

.kg-bookmark-title {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.kg-bookmark-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kg-bookmark-metadata {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.kg-bookmark-icon {
    width: 20px;
    height: 20px;
    border-radius: 2px;
}

.kg-bookmark-author {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.kg-bookmark-publisher {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.kg-bookmark-author::after {
    content: "•";
    margin: 0 0.5rem;
}

.kg-bookmark-thumbnail {
    flex-shrink: 0;
    width: 160px;
}

.kg-bookmark-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    margin: 0;
}

@media (max-width: 600px) {
    .kg-bookmark-container {
        flex-direction: column-reverse;
    }
    
    .kg-bookmark-thumbnail {
        width: 100%;
        height: 160px;
    }
}

/* Callout Card */
.kg-callout-card {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    border-radius: var(--radius-md);
    margin: 2rem 0;
}

.kg-callout-card-grey {
    background: rgba(139, 115, 85, 0.08);
}

.kg-callout-card-white {
    background: var(--letter-paper);
    border: 1px solid var(--border-color);
}

.kg-callout-card-blue {
    background: rgba(66, 133, 244, 0.1);
}

.kg-callout-card-green {
    background: rgba(52, 168, 83, 0.1);
}

.kg-callout-card-yellow {
    background: rgba(251, 188, 4, 0.1);
}

.kg-callout-card-red {
    background: rgba(234, 67, 53, 0.1);
}

.kg-callout-card-pink {
    background: rgba(219, 68, 149, 0.1);
}

.kg-callout-card-purple {
    background: rgba(142, 68, 173, 0.1);
}

.kg-callout-card-accent {
    background: rgba(139, 115, 85, 0.15);
}

.kg-callout-emoji {
    font-size: 1.25rem;
    line-height: 1.4;
}

.kg-callout-text {
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Button Card */
.kg-button-card {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

.kg-button-card.kg-align-left {
    justify-content: flex-start;
}

.kg-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.kg-btn-accent {
    background: var(--accent-color);
    color: white;
}

.kg-btn-accent:hover {
    background: var(--text-primary);
    color: white;
}

/* Toggle Card */
.kg-toggle-card {
    margin: 2rem 0;
    background: var(--letter-paper);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.kg-toggle-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    cursor: pointer;
}

.kg-toggle-heading-text {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.kg-toggle-card-icon {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.kg-toggle-card[data-kg-toggle-state="open"] .kg-toggle-card-icon {
    transform: rotate(180deg);
}

.kg-toggle-content {
    padding: 0 1.25rem 1rem;
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Video Card */
.kg-video-card {
    margin: 2rem 0;
}

.kg-video-container {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.kg-video-container video {
    width: 100%;
    display: block;
}

/* Audio Card */
.kg-audio-card {
    margin: 2rem 0;
    background: var(--letter-paper);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
}

/* File Card */
.kg-file-card {
    margin: 2rem 0;
}

.kg-file-card-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--letter-paper);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
}

.kg-file-card-contents {
    flex: 1;
}

.kg-file-card-title {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.kg-file-card-caption {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.kg-file-card-metadata {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.kg-file-card-icon {
    width: 24px;
    height: 24px;
    color: var(--accent-color);
}

/* Product Card */
.kg-product-card {
    margin: 2rem 0;
    background: var(--letter-paper);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.kg-product-card-image {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.kg-product-card-container {
    padding: 1.25rem;
}

.kg-product-card-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.kg-product-card-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Header Card */
.kg-header-card {
    margin: 2rem 0;
    padding: 3rem 2rem;
    text-align: center;
    border-radius: var(--radius-md);
}

.kg-header-card.kg-style-dark {
    background: var(--text-primary);
    color: var(--letter-paper);
}

.kg-header-card.kg-style-light {
    background: var(--letter-paper);
    border: 1px solid var(--border-color);
}

.kg-header-card.kg-style-accent {
    background: var(--accent-color);
    color: white;
}

.kg-header-card h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 500;
    margin: 0 0 0.75rem;
}

.kg-header-card p {
    font-size: 1.1rem;
    margin: 0;
    opacity: 0.9;
}

/* Embed/Video Responsive */
.kg-embed-card {
    margin: 2rem 0;
}

.kg-embed-card iframe {
    width: 100%;
    border-radius: var(--radius-md);
}

/* NFT Card */
.kg-nft-card {
    margin: 2rem 0;
    background: var(--letter-paper);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

/* Signup Card */
.kg-signup-card {
    margin: 2rem 0;
    padding: 2rem;
    background: var(--letter-paper);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
}

.kg-signup-card h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 0.5rem;
}

.kg-signup-card p {
    color: var(--text-secondary);
    margin: 0 0 1rem;
}

/* Letter Footer */
.letter-full-footer {
    position: relative;
    z-index: 1;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
}

.letter-signature {
    flex: 1;
}

.signature-line {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.signature-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.signature-name {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-primary);
}

.signature-bio {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0.5rem 0 0;
}

.letter-share {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

.share-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.share-buttons {
    display: flex;
    gap: 0.5rem;
}

.share-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(139, 115, 85, 0.1);
    color: var(--accent-color);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-button:hover {
    background: var(--accent-color);
    color: white;
}

.share-copy.copied {
    background: #4CAF50;
    color: white;
}

/* ============================================
   Letters Reply Section (Custom Comments)
   ============================================ */
.letters-reply {
    margin-top: 2rem;
    background: var(--letter-paper);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color);
}

.reply-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.reply-icon {
    width: 28px;
    height: 28px;
    color: var(--accent-color);
}

.reply-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
}

.reply-count {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-left: auto;
}

/* Reply List */
.reply-list {
    margin-bottom: 1.5rem;
}

.reply-loading,
.reply-empty,
.reply-error {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: 2rem;
}

.reply-item {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.reply-item:last-child {
    border-bottom: none;
}

.reply-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.reply-avatar.syunjyu {
    background: linear-gradient(135deg, #fce4ec, #f8bbd9);
}

.reply-avatar.fei {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
}

.reply-body {
    flex: 1;
    min-width: 0;
}

.reply-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.reply-author {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.reply-time {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.reply-text {
    word-break: break-word;
    overflow-wrap: break-word;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Reply Form */
.reply-form {
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.reply-form-header {
    padding: 0.75rem 1rem;
    background: rgba(139, 115, 85, 0.05);
    border-bottom: 1px solid var(--border-color);
}

.reply-as {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.reply-as strong {
    color: var(--accent-color);
}

.reply-input {
    width: 100%;
    padding: 1rem;
    padding-right: 3rem; /* Leave space for image button */
    padding-bottom: 2.5rem; /* Leave space for image button */
    border: none;
    resize: none;
    font-family: var(--font-serif);
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: transparent;
}

.reply-input:focus {
    outline: none;
}

.reply-input::placeholder {
    color: var(--text-muted);
}

.reply-form-footer {
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: flex-end;
    border-top: 1px solid var(--border-color);
}

.reply-submit {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-serif);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.reply-submit:hover {
    background: var(--text-primary);
}

.reply-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.reply-cancel {
    padding: 0.6rem 1rem;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-serif);
    font-size: 0.9rem;
    cursor: pointer;
    margin-right: 0.5rem;
    transition: all var(--transition-fast);
}

.reply-cancel:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* Reply Actions */
.reply-actions {
    margin-left: auto;
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.reply-item:hover .reply-actions {
    opacity: 1;
}

.reply-action-btn {
    padding: 0.25rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.reply-action-btn:hover {
    color: var(--accent-color);
    background: rgba(139, 115, 85, 0.1);
}

.reply-action-btn.reply-delete:hover {
    color: #c0392b;
    background: rgba(192, 57, 43, 0.1);
}

.reply-action-btn.reply-to-btn {
    color: var(--accent-color);
}

/* Nested Replies */
.reply-children {
    margin-left: 2.5rem;
    border-left: 2px solid var(--border-color);
    padding-left: 1rem;
    margin-top: 0.5rem;
}

.reply-item.depth-1,
.reply-item.depth-2,
.reply-item.depth-3 {
    padding: 0.75rem 0;
}

.reply-item.depth-1 .reply-avatar,
.reply-item.depth-2 .reply-avatar,
.reply-item.depth-3 .reply-avatar {
    width: 32px;
    height: 32px;
    font-size: 1rem;
}

.reply-actions-wrap {
    margin-left: auto;
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.reply-item:hover > .reply-body > .reply-meta > .reply-actions-wrap,
.reply-item:hover .reply-actions {
    opacity: 1;
}

/* Reply Hint */
.reply-hint {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1rem;
    font-size: 0.85rem;
    color: var(--accent-color);
    background: rgba(139, 115, 85, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

.reply-hint strong {
    font-weight: 500;
}

.reply-hint-cancel {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    padding: 0;
    margin-left: 0.25rem;
}

.reply-hint-cancel:hover {
    color: var(--text-primary);
}

/* ============================================
   Comment Image Upload & Display
   ============================================ */

/* Input wrapper with image button */
.reply-input-wrapper {
    position: relative;
}

.reply-input-actions {
    position: absolute;
    right: 0.5rem;
    bottom: 0.5rem;
    display: flex;
    gap: 0.25rem;
}

.image-upload-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(139, 115, 85, 0.08);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.image-upload-btn:hover {
    background: rgba(139, 115, 85, 0.15);
    color: var(--accent-color);
}

/* Image preview container */
.image-preview-container {
    display: none;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(139, 115, 85, 0.03);
}

.image-preview-item {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.image-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-preview-item.uploading {
    opacity: 0.6;
}

.image-preview-item .upload-progress {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.7);
}

.progress-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.image-preview-remove {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 18px;
    height: 18px;
    border: none;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border-radius: 50%;
    font-size: 12px;
    line-height: 1;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.image-preview-item:hover .image-preview-remove {
    opacity: 1;
}

/* Drag over state */
.reply-input.drag-over {
    background: rgba(139, 115, 85, 0.08);
    border-color: var(--accent-color);
}

/* Comment images display */
.reply-images {
    display: grid;
    gap: 0.5rem;
    margin-top: 0.75rem;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.reply-images.single {
    max-width: 300px;
}

.reply-images.double {
    grid-template-columns: repeat(2, 1fr);
    max-width: 400px;
}

.reply-images.grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 400px;
}

.reply-images.grid-many {
    grid-template-columns: repeat(3, 1fr);
    max-width: 450px;
}

.reply-image {
    position: relative;
    aspect-ratio: 1;
    cursor: pointer;
    overflow: hidden;
    border-radius: var(--radius-sm);
    background: var(--bg-pattern);
}

.reply-images.single .reply-image {
    aspect-ratio: auto;
    max-height: 300px;
}

.reply-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.reply-image:hover img {
    transform: scale(1.05);
}

/* Image Lightbox */
.image-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.image-lightbox.active {
    opacity: 1;
    visibility: visible;
}

.image-lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Mobile adjustments for images */
@media (max-width: 480px) {
    .reply-images.double,
    .reply-images.grid,
    .reply-images.grid-many {
        max-width: 100%;
    }

    .image-preview-item {
        width: 60px;
        height: 60px;
    }
}

/* ============================================
   Related Letters
   ============================================ */
.related-letters {
    margin-top: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
}

.related-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 1.5rem;
    text-align: center;
}

.related-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.related-card {
    background: var(--letter-paper);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.related-card:hover {
    box-shadow: var(--shadow-soft);
    transform: translateY(-2px);
}

.related-date {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.related-card-title {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    padding: 1.5rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.5);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-copyright {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.footer-copyright a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-copyright a:hover {
    color: var(--accent-color);
}

/* ============================================
   Changelog Page (更新日志页面)
   ============================================ */
.changelog-page {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1rem 4rem;
    min-height: calc(100vh - 200px);
}

.changelog-paper {
    background: var(--letter-paper);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color);
}

.changelog-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.changelog-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 0.5rem;
}

.changelog-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

.changelog-form-wrapper {
    margin-bottom: 1.5rem;
}

.changelog-add-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.changelog-add-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.changelog-form {
    margin-top: 1rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.changelog-input {
    width: 100%;
    padding: 1rem;
    border: none;
    resize: none;
    font-family: var(--font-serif);
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.changelog-input:focus {
    outline: none;
}

.changelog-input::placeholder {
    color: var(--text-muted);
}

.changelog-form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(139, 115, 85, 0.05);
    border-top: 1px solid var(--border-color);
}

.changelog-cancel,
.changelog-submit {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.changelog-cancel {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
}

.changelog-cancel:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.changelog-submit {
    background: var(--accent-color);
    border: none;
    color: white;
}

.changelog-submit:hover {
    background: var(--text-primary);
}

/* Changelog List */
.changelog-list {
    min-height: 100px;
}

.changelog-loading,
.changelog-empty {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 2rem;
    font-style: italic;
}

.changelog-group {
    margin-bottom: 1.5rem;
}

.changelog-group:last-child {
    margin-bottom: 0;
}

.changelog-month {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    color: var(--accent-color);
    margin: 0 0 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px dashed var(--border-color);
}

.changelog-entries {
    padding-left: 0.5rem;
}

.changelog-entry {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.5rem 0;
    font-size: 0.9rem;
}

.changelog-entry.is-request {
    background: rgba(var(--accent-color-rgb, 139, 115, 85), 0.05);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    margin: 0.25rem 0;
}

.changelog-day {
    flex-shrink: 0;
    min-width: 32px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.changelog-type-tag {
    flex-shrink: 0;
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    font-weight: 500;
}

.changelog-type-tag.update {
    background: #e8f5e9;
    color: #2e7d32;
}

.changelog-type-tag.request {
    background: #fff3e0;
    color: #e65100;
}

.changelog-text {
    flex: 1;
    color: var(--text-secondary);
    line-height: 1.5;
}

.changelog-author-tag {
    font-size: 0.75rem;
    color: var(--accent-color);
    margin-left: 0.25rem;
}

.changelog-delete {
    opacity: 0;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    font-size: 1rem;
    line-height: 1;
    transition: all var(--transition-fast);
}

.changelog-entry:hover .changelog-delete {
    opacity: 1;
}

.changelog-delete:hover {
    color: #c0392b;
}

/* Nav User Area */
.nav-user-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid var(--border-color);
    flex-shrink: 0;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.footer-nav a {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-copyright {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.footer-copyright a {
    color: var(--text-muted);
}

/* Hide Ghost Portal Sign Up button */
/* Hide Ghost Portal elements */
.gh-portal-triggerbtn-container,
.gh-portal-triggerbtn-wrapper,
.gh-portal-triggerbtn-iframe,
[data-portal],
[data-portal="signup"],
.gh-head-actions [href*="subscribe"],
.gh-head-actions [href*="signup"],
.portal-button,
iframe[title*="portal"] {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
}

/* ============================================
   Page Template
   ============================================ */
.page-content {
    max-width: var(--max-width);
    margin: 0 auto;
}

.page-paper {
    background: var(--letter-paper);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color);
}

.page-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 2rem;
    text-align: center;
}

/* About Page Styles */
.about-page .page-paper {
    text-align: center;
}

.about-header {
    margin-bottom: 2rem;
}

.about-emoji {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
    animation: heartbeat 1.5s ease-in-out infinite;
}

.about-page .page-title {
    margin-bottom: 0;
}

.about-intro {
    max-width: 500px;
    margin: 0 auto 2rem;
    text-align: center;
}

.about-lead {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.about-intro p {
    color: var(--text-secondary);
    line-height: 2;
}

.about-intro blockquote {
    font-style: italic;
    color: var(--accent-color);
    border: none;
    background: none;
    padding: 0;
    margin: 2rem 0;
    font-size: 1.1rem;
}

/* ============================================
   Tag/Author Pages
   ============================================ */
.archive-header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 2rem;
}

.archive-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 0.5rem;
}

.archive-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================
   Error Page
   ============================================ */
.error-content {
    text-align: center;
    padding: 4rem 2rem;
}

.error-code {
    font-size: 6rem;
    font-weight: 500;
    color: var(--border-color);
    margin: 0;
    line-height: 1;
}

.error-message {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 1rem 0;
}

.error-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: white;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

.error-link:hover {
    background: var(--text-primary);
    color: white;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-primary);
}

.hamburger-box {
    width: 24px;
    height: 24px;
    display: inline-block;
    position: relative;
}

.hamburger-inner {
    display: block;
    top: 50%;
    margin-top: -2px;
}

.hamburger-inner, 
.hamburger-inner::before, 
.hamburger-inner::after {
    width: 24px;
    height: 2px;
    background-color: currentColor;
    border-radius: 2px;
    position: absolute;
    transition-property: transform;
    transition-duration: 0.15s;
    transition-timing-function: ease;
}

.hamburger-inner::before, 
.hamburger-inner::after {
    content: "";
    display: block;
}

.hamburger-inner::before {
    top: -8px;
}

.hamburger-inner::after {
    bottom: -8px;
}

/* Active Hamburger State */
.mobile-menu-toggle.active .hamburger-inner {
    transform: rotate(45deg);
}

.mobile-menu-toggle.active .hamburger-inner::before {
    top: 0;
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger-inner::after {
    bottom: 0;
    transform: rotate(-90deg);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .site-header {
        padding: 1rem;
    }
    
    .header-inner {
        flex-direction: row;
        gap: 1rem;
        flex-wrap: wrap;
    }
    
    .mobile-menu-toggle {
        display: block;
    }

    .site-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        padding-top: 1rem;
        border-top: 1px solid var(--border-color);
        margin-top: 0.5rem;
        animation: slideDown 0.3s ease forwards;
    }

    .site-nav.active {
        display: flex;
    }

    @keyframes slideDown {
        from { opacity: 0; transform: translateY(-10px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .nav-links {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 0;
        border-left: none;
        width: 100%;
        gap: 0;
    }

    .site-nav-menu {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 0;
    }

    .nav-link, 
    .nav-links a,
    .site-nav-menu .nav-item,
    .gh-navigation a {
        display: block;
        width: 100%;
        padding: 0.75rem 0;
        border-bottom: 1px dashed var(--border-color);
    }

    .nav-user-area {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        width: 100%;
        margin-top: 1rem;
        justify-content: space-between;
    }

    /* Adjust animations for mobile list items */
    .site-nav-menu .nav-item::after,
    .gh-navigation a::after,
    .nav-link::after,
    .nav-links a::after {
        display: none; /* Disable underline animation on mobile */
    }

    .letters-title {
        font-size: 2rem;
    }
    
    .letter-paper {
        padding: 1.5rem;
    }
    
    .letter-full-paper {
        padding: 2rem 1.5rem;
    }
    
    .letter-full-paper::before {
        left: 1.5rem;
        right: 1.5rem;
    }
    
    .letter-full-title {
        font-size: 1.75rem;
    }
    
    .letter-full-footer {
        flex-direction: column;
    }
    
    .letter-share {
        align-items: flex-start;
    }
    
    .pagination {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .letters-title {
        font-size: 1.75rem;
    }
    
    .letter-title {
        font-size: 1.25rem;
    }
    
    .gh-content {
        font-size: 1rem;
    }
}

/* ============================================
   Dark Mode Support
   ============================================ */
@media (prefers-color-scheme: dark) {
    :root {
        --letter-paper: #2A2520;
        --text-primary: #F5F0EA;
        --text-secondary: #B8A99A;
        --text-muted: #8A7B6C;
        --border-color: #3D352E;
        --bg-color: #1A1714;
        --bg-pattern: #242019;
    }
    
    body {
        background-image: 
            radial-gradient(circle at 20% 50%, rgba(139, 115, 85, 0.05) 0%, transparent 50%),
            radial-gradient(circle at 80% 20%, rgba(139, 115, 85, 0.05) 0%, transparent 50%);
    }
    
    .site-header {
        background: rgba(26, 23, 20, 0.9);
    }
    
    .site-footer {
        background: rgba(26, 23, 20, 0.5);
    }
    
    .letters-reply {
        background: #242019;
    }
    
    .related-letters {
        background: rgba(36, 32, 25, 0.5);
    }
}

/* ============================================
   Love Code Gate
   ============================================ */
.love-gate {
    min-height: 100vh;
    background: var(--bg-color);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(139, 115, 85, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 115, 85, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 60% 80%, rgba(139, 115, 85, 0.02) 0%, transparent 50%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    transition: opacity 0.3s ease;
}

.love-gate.fade-out {
    opacity: 0;
}

.love-container {
    background: var(--letter-paper);
    padding: 3rem 3.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    border: 1px solid var(--border-color);
    text-align: center;
    max-width: 440px;
    width: 100%;
}

.love-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    animation: heartbeat 1.5s ease-in-out infinite;
}

.love-title {
    font-family: 'EB Garamond', Georgia, serif;
    font-size: 2rem;
    font-weight: 500;
    font-style: italic;
    color: var(--text-primary);
    margin: 0 0 0.5rem;
    letter-spacing: 0.02em;
}

.love-subtitle {
    font-family: var(--font-serif);
    color: var(--text-secondary);
    margin: 0 0 2rem;
    font-size: 1rem;
}

.love-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.love-input {
    font-family: var(--font-serif);
    font-size: 1rem;
    padding: 1rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: white;
    color: var(--text-primary);
    text-align: center;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.love-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(139, 115, 85, 0.1);
}

.love-input::placeholder {
    color: var(--text-muted);
}

.love-input.shake {
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-8px); }
    40%, 80% { transform: translateX(8px); }
}

.love-submit {
    font-family: var(--font-serif);
    font-size: 1rem;
    padding: 1rem 1.5rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.love-submit:hover {
    background: var(--text-primary);
    transform: translateY(-1px);
}

.love-submit svg {
    transition: transform var(--transition-fast);
}

.love-submit:hover svg {
    transform: translateX(4px);
}

.love-error {
    color: #c0392b;
    font-size: 0.9rem;
    margin: 0.5rem 0 0;
    min-height: 1.5rem;
    font-style: italic;
}

.love-hint {
    margin: 2rem 0 0;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.hint-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.hint-lyric {
    font-family: 'EB Garamond', Georgia, serif;
    font-size: 1.05rem;
    font-style: italic;
    color: var(--accent-color);
    line-height: 1.6;
}

.love-icp {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
}

.love-icp a {
    color: var(--text-muted);
    text-decoration: none;
}

.love-icp a:hover {
    color: var(--accent-color);
}

@media (max-width: 480px) {
    .love-container {
        padding: 2rem 1.5rem;
    }
    
    .love-title {
        font-size: 1.75rem;
    }
    
    .hint-lyric {
        font-size: 0.95rem;
    }
    
    .love-icp {
        bottom: 1rem;
        font-size: 0.7rem;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .site-header,
    .site-footer,
    .letter-share,
    .letters-reply,
    .related-letters,
    .pagination {
        display: none;
    }
    
    .letter-full-paper {
        box-shadow: none;
        border: none;
        padding: 0;
    }
    
    .letter-full-paper::before {
        display: none;
    }
}

.reply-text a {
    word-break: break-all;
}