:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --card-bg: #ffffff;
    --navbar-bg-start: #2c3e50;
    --navbar-bg-end: #3498db;
    --footer-bg: #2c3e50;
    --border-color: #dee2e6;
    --bg-secondary: #f5f5f5;
}

[data-theme="dark"] {
    --primary-color: #1a252f;
    --secondary-color: #2980b9;
    --text-color: #e0e0e0;
    --light-bg: #1a1a1a;
    --card-bg: #2d2d2d;
    --navbar-bg-start: #1a252f;
    --navbar-bg-end: #2980b9;
    --footer-bg: #1a252f;
    --border-color: #404040;
    --bg-secondary: #1e1e1e;
}

body {
    font-family: 'IBM Plex Sans', 'Segoe UI', 'DejaVu Sans', Arial, sans-serif;
    color: var(--text-color);
    padding-top: 80px;
    background-color: var(--light-bg);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.navbar {
    background: linear-gradient(135deg, var(--navbar-bg-start) 0%, var(--navbar-bg-end) 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.language-selector {
    cursor: pointer;
}

.language-selector .dropdown-item {
    cursor: pointer;
}

.theme-toggle {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0.5rem 1rem;
}

.theme-switch-wrapper {
    display: flex;
    align-items: center;
}

.theme-switch {
    display: inline-block;
    height: 28px;
    position: relative;
    width: 54px;
}

.theme-switch input {
    display: none;
}

.slider {
    background-color: rgba(255, 255, 255, 0.3);
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: 0.4s;
    border-radius: 34px;
}

.slider:before {
    background-color: white;
    bottom: 4px;
    content: "";
    height: 20px;
    left: 4px;
    position: absolute;
    transition: 0.4s;
    width: 20px;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: rgba(255, 255, 255, 0.5);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    pointer-events: none;
}

.slider-icon.sun {
    left: 6px;
    color: #ffd700;
}

.slider-icon.moon {
    right: 6px;
    color: #f0f0f0;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.post-card {
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    background-color: var(--card-bg);
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.post-meta {
    color: #6c757d;
    font-size: 0.9rem;
}

[data-theme="dark"] .text-muted {
    color: #bbb !important;
}

.post-meta i {
    margin-right: 5px;
}

/* Featured Posts Styling */
.featured-posts {
    margin-bottom: 3rem;
}

.featured-post-card {
    transition: transform 0.3s, box-shadow 0.3s;
    background-color: var(--card-bg);
    overflow: hidden;
}

.featured-post-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(255, 193, 7, 0.3) !important;
}

.featured-post-card .card-title {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.featured-post-card .card-title a {
    color: inherit;
}

.featured-post-card .card-title a:hover {
    color: var(--secondary-color);
}

.featured-post-card .badge {
    font-size: 0.85rem;
    padding: 0.5rem 0.75rem;
}

footer {
    background-color: var(--footer-bg);
    color: white;
    padding: 2rem 0;
    margin-top: 4rem;
}

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

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}

.card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-color);
}

.alert-info {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-color);
}

.modal-content {
    background-color: var(--card-bg);
    color: var(--text-color);
}

.form-control {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-color);
}

.form-control:focus {
    background-color: var(--card-bg);
    color: var(--text-color);
}

.input-group-text {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-color);
}

a {
    color: var(--secondary-color);
}

a:hover {
    color: #2980b9;
}

.post-card .card-title a {
    color: var(--text-color);
}

.post-card .card-title a:hover {
    color: var(--secondary-color);
}

/* Author Avatar Gradient */
.author-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
}

.author-avatar-large {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
}

/* Reactions Section */
.reactions-section {
    margin: 3rem 0;
    padding: 2rem;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    text-align: center;
}

.reactions-container {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Card Variations */
.card-secondary {
    border: none;
    background-color: var(--bg-secondary);
    padding: 2rem;
}

/* Upload Icon */
.upload-icon {
    font-size: 3rem;
    color: #007bff;
    margin-bottom: 1rem;
}

/* Error Icon */
.error-icon {
    font-size: 5rem;
    color: #ffc107;
}

/* Sidebar User Label */
.sidebar-user-label {
    color: rgba(255, 255, 255, 0.85);
}

/* Author Bio Font */
.author-bio {
    font-size: 1.05rem;
    line-height: 1.6;
}

/* Author Byline Font */
.author-byline {
    font-size: 0.95rem;
}

.social-share {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.social-share a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    transition: transform 0.2s, background-color 0.2s;
    text-decoration: none;
}

.social-share a:hover {
    transform: translateY(-3px);
}

.social-share .linkedin {
    background-color: #0077b5;
    color: white;
}

.social-share .linkedin:hover {
    background-color: #005885;
}

.social-share .twitter {
    background-color: #000000;
    color: white;
}

.social-share .twitter:hover {
    background-color: #333333;
}

.social-share .bluesky {
    background-color: #0085ff;
    color: white;
}

.social-share .bluesky:hover {
    background-color: #0066cc;
}