/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2d3748;
    --secondary-color: #4a5568;
    --accent-color: #667eea;
    --accent-hover: #5a67d8;
    --bg-color: #ffffff;
    --bg-secondary: #f7fafc;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.8;
    color: var(--text-primary);
    background-color: var(--bg-color);
    font-synthesis: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Chinese text optimization */
:lang(zh) {
    letter-spacing: 0.02em;
}

/* English text optimization */
:lang(en) {
    letter-spacing: 0.01em;
    word-spacing: 0.05em;
}

/* Typography improvements for all languages */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

/* English typography specific improvements */
:lang(en) h1, :lang(en) h2, :lang(en) h3, :lang(en) h4, :lang(en) h5, :lang(en) h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

:lang(en) .blog-content {
    line-height: 1.7;
    letter-spacing: 0.01em;
    word-spacing: 0.03em;
}

:lang(en) .comment-content {
    line-height: 1.6;
    letter-spacing: 0.005em;
    word-spacing: 0.02em;
}

/* Chinese text in blog content */
:lang(zh) .blog-content {
    line-height: 1.8;
    letter-spacing: 0.01em;
}

/* Chinese text in comments */
:lang(zh) .comment-content {
    line-height: 1.7;
    letter-spacing: 0.01em;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color);
    border-radius: 1px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    background: var(--bg-secondary);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* Hero Section */
.hero {
    padding: 160px 0 120px;
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
}

.hero-content {
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-color);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* About Section */
.about {
    padding: 120px 0;
    background: var(--bg-color);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 48px;
    letter-spacing: -0.5px;
}

.about-text {
    text-align: left;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

/* Blogs Section */
.blogs {
    padding: 120px 0;
    background: var(--bg-secondary);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
    flex-wrap: wrap;
    gap: 16px;
}

.blogs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 32px;
}

.blog-card {
    background: var(--bg-color);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    cursor: pointer;
    position: relative;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.blog-card::after {
    content: 'Click to view details';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(45, 55, 72, 0.9);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.9rem;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    white-space: nowrap;
}

.blog-card:hover::after {
    opacity: 1;
}

.blog-card.shared {
    border-left: 4px solid var(--accent-color);
}

.blog-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
    line-height: 1.4;
}

.blog-content {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.blog-actions {
    display: flex;
    gap: 8px;
}

.blog-actions .btn {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-color);
    border-radius: 16px;
    padding: 40px;
    max-width: 480px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.modal-content.modal-large {
    max-width: 800px;
    width: 95%;
}

.modal-content.modal-xlarge {
    max-width: 1200px;
    width: 95%;
}

/* Image Edit Modal Styles */
.image-edit-container {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 24px;
    max-height: 80vh;
}

.image-preview-area {
    background: var(--bg-secondary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    overflow: auto;
    padding: 20px;
}

#imageCanvas {
    max-width: 100%;
    max-height: 100%;
    box-shadow: var(--shadow-md);
}

.image-edit-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 80vh;
    overflow-y: auto;
    padding: 8px;
}

.control-group {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
}

.control-group h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.control-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.control-row label {
    min-width: 80px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.control-row input[type="number"] {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.875rem;
}

.control-row input[type="range"] {
    flex: 1;
}

.control-row span {
    min-width: 40px;
    text-align: right;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.control-row input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
}

.control-row label[for="monochromeToggle"] {
    min-width: auto;
    cursor: pointer;
}

/* Favorite button styles */
.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    visibility: visible !important;
    opacity: 1 !important;
}

.btn-icon i {
    width: 24px;
    height: 24px;
    color: var(--text-secondary);
    visibility: visible !important;
    opacity: 1 !important;
}

.btn-icon:hover i {
    color: var(--primary-color);
}

.btn-icon.favorited {
    color: #ff4757;
}

.btn-icon.favorited i {
    color: #ff4757;
}

.btn-icon.favorited svg {
    fill: #ff4757 !important;
    color: #ff4757 !important;
    stroke: #ff4757 !important;
}

/* Ensure the heart icon is solid when favorited */
.btn-icon.favorited svg path {
    fill: #ff4757 !important;
}

/* Quill Editor Styles */
#editor-container {
    height: 300px;
    border-radius: 8px;
    margin-bottom: 20px;
}

#editor-container .ql-toolbar {
    border-radius: 8px 8px 0 0;
    border-color: var(--border-color);
    background: var(--bg-secondary);
}

#editor-container .ql-container {
    border-radius: 0 0 8px 8px;
    border-color: var(--border-color);
    font-family: inherit;
    font-size: 1rem;
}

#editor-container .ql-editor {
    min-height: 250px;
    line-height: 1.7;
}

#editor-container .ql-editor p {
    margin-bottom: 12px;
}

/* Blog Content Styles */
.blog-content {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.blog-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 16px 0;
}

.blog-content h1,
.blog-content h2,
.blog-content h3 {
    color: var(--primary-color);
    margin: 20px 0 12px;
}

.blog-content ul,
.blog-content ol {
    margin: 12px 0;
    padding-left: 24px;
}

.blog-content blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--text-secondary);
    font-style: italic;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: 300;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.close:hover {
    color: var(--primary-color);
}

.modal-content h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 24px;
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-color);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-switch {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-switch a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.form-switch a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: white;
    padding: 40px 0;
    text-align: center;
}

.footer p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        gap: 16px;
    }

    .nav-link {
        display: none;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .section-title {
        font-size: 2rem;
    }

    .about,
    .blogs {
        padding: 80px 0;
    }

    .blogs-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        padding: 24px;
        margin: 16px;
    }

    /* Image Edit Modal Mobile Responsive */
    .modal-content.modal-xlarge {
        max-width: 100%;
        width: 95%;
        padding: 16px;
        margin: 8px;
        max-height: 95vh;
    }

    .image-edit-container {
        grid-template-columns: 1fr;
        gap: 16px;
        max-height: none;
    }

    .image-preview-area {
        min-height: 200px;
        padding: 12px;
        order: 1;
    }

    #imageCanvas {
        max-width: 100%;
        max-height: 40vh;
    }

    .image-edit-controls {
        max-height: none;
        overflow-y: visible;
        padding: 4px;
        order: 2;
    }

    .control-group {
        padding: 12px;
    }

    .control-group h3 {
        font-size: 0.9rem;
        margin-bottom: 8px;
    }

    .control-row {
        margin-bottom: 6px;
    }

    .control-row label {
        min-width: 60px;
        font-size: 0.8rem;
    }

    .modal-content h2 {
        font-size: 1.25rem;
        margin-bottom: 16px;
    }

    .close {
        right: 12px;
        top: 12px;
        font-size: 24px;
    }
}

/* Loading State */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 16px 24px;
    background: var(--primary-color);
    color: white;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    z-index: 3000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    background: #48bb78;
}

.toast.error {
    background: #f56565;
}

/* Blog Detail Section */
.blog-detail {
    padding: 120px 0;
    background: var(--bg-secondary);
}

.blog-detail-container {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 40px;
    align-items: start;
}

.thumbnail-selector {
    background: var(--bg-color);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    position: sticky;
    top: 96px;
    max-height: calc(100vh - 128px);
    overflow-y: auto;
}

.thumbnail-selector .section-title {
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.thumbnails-list {
    margin: 24px 0;
}

.thumbnail-item {
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: var(--transition);
    border-left: 4px solid transparent;
}

.thumbnail-item:hover {
    background: var(--bg-secondary);
    transform: translateX(4px);
}

.thumbnail-item.active {
    background: var(--bg-secondary);
    border-left-color: var(--accent-color);
}

.thumbnail-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 4px;
    line-height: 1.4;
}

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

.blog-content-container {
    background: var(--bg-color);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.blog-detail-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.blog-detail-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
    line-height: 1.2;
}

.blog-detail-meta {
    display: flex;
    gap: 24px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.blog-detail-content {
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.blog-detail-content h1,
.blog-detail-content h2,
.blog-detail-content h3 {
    margin: 24px 0 16px 0;
    color: var(--primary-color);
}

.blog-detail-content p {
    margin-bottom: 16px;
}

.blog-detail-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 24px 0;
}

.blog-detail-content ul,
.blog-detail-content ol {
    margin: 16px 0;
    padding-left: 24px;
}

.blog-detail-content blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--text-secondary);
    font-style: italic;
}

.blog-detail-actions {
    display: flex;
    gap: 12px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.comments-section {
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.comments-title {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.comments-list {
    margin-bottom: 24px;
}

.comment-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
}

.comment-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.comment-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.comment-content {
    color: var(--text-primary);
    line-height: 1.6;
    white-space: pre-wrap;
}

.comment-delete-btn {
    background: none;
    border: none;
    color: #ef4444;
    cursor: pointer;
    font-size: 0.875rem;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.comment-delete-btn:hover {
    background-color: #fee2e2;
}

.comment-form-container {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.comment-textarea {
    width: 100%;
    min-height: 100px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    margin-bottom: 12px;
}

.comment-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.comment-textarea::placeholder {
    color: var(--text-secondary);
}

/* Responsive Design for Blog Detail */
@media (max-width: 1024px) {
    .blog-detail-container {
        grid-template-columns: 280px 1fr;
        gap: 24px;
    }
    
    .blog-content-container {
        padding: 32px;
    }
}

@media (max-width: 768px) {
    .blog-detail {
        padding: 80px 0;
    }
    
    .blog-detail-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .thumbnail-selector {
        position: static;
        max-height: none;
    }
    
    .blog-detail-title {
        font-size: 2rem;
    }
    
    .blog-content-container {
        padding: 24px;
    }
    
    .blog-detail-actions {
        flex-wrap: wrap;
    }
}

/* Recent Accounts Dropdown Styles */
.share-input-container {
    position: relative;
}

.recent-accounts-list {
    margin-top: 8px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
}

.recent-accounts-list.has-items {
    max-height: 200px;
}

.recent-accounts-title {
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 8px 12px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.recent-account-item {
    padding: 10px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

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

.recent-account-item:hover {
    background: var(--bg-secondary);
}

.recent-account-item i {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
}

.recent-account-email {
    flex: 1;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.recent-account-remove {
    opacity: 0;
    transition: opacity 0.2s;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.recent-account-item:hover .recent-account-remove {
    opacity: 1;
}

.recent-account-remove:hover {
    color: #e74c3c;
}