/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Murha.info inspired dark theme colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #999999;
    --accent-primary: #888888;
    --accent-secondary: #666666;
    --border-color: #333333;
    --hover-bg: #222222;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
    --overlay-bg: rgba(128, 128, 128, 0.8);
    --nav-button-bg: rgba(128, 128, 128, 0.6);
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e0e0e0;
    --text-primary: #333333;
    --text-secondary: #555555;
    --text-muted: #777777;
    --accent-primary: #2196f3;
    --accent-secondary: #ff6b35;
    --border-color: #e0e0e0;
    --hover-bg: #f0f0f0;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    /* Background: Kakola Turku.jpg by Mikkoau, CC-BY-SA 4.0, https://commons.wikimedia.org/wiki/File:Kakola_Turku.jpg */
    background-image: url('https://upload.wikimedia.org/wikipedia/commons/c/c4/Kakola_Turku.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: -1;
    pointer-events: none;
}

/* Header */
.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.ad-space {
    width: 100%;
    max-width: 1920px;
}

.ad-space img {
    width: 100%;
    height: auto;
    display: block;
}

.logo-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.logo-section a {
    display: inline-block;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.logo-section a:hover {
    opacity: 0.8;
}

.logo-image {
    max-width: 100%;
    max-height: 180px;
    height: auto;
    object-fit: contain;
    border-radius: 4px;
    display: block;
}

.logo {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-primary);
    text-align: center;
    margin: 0;
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: absolute;
    top: 1rem;
    right: 1rem;
}

.theme-toggle:hover {
    background-color: var(--hover-bg);
}

.nav {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background-color: var(--nav-button-bg);
    backdrop-filter: blur(5px);
}

/* Buttons */
.btn-primary {
    background-color: var(--nav-button-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.btn-primary:hover {
    background-color: var(--overlay-bg);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* Main layout */
.main {
    flex: 1;
    padding: 2rem 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 300px 1fr 300px;
    gap: 2rem;
}

/* Sidebar */
.sidebar, .right-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.section {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.section h3 {
    background-color: var(--bg-tertiary);
    padding: 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.thread-list,
.category-list {
    padding: 0.5rem 0;
}

.thread-item {
    padding: 0.75rem 1rem;
    border-left: 3px solid transparent;
    transition: all 0.3s ease;
    cursor: pointer;
}

.thread-item:hover {
    background-color: var(--hover-bg);
    border-left-color: var(--accent-primary);
}

.thread-item.hot {
    border-left-color: var(--accent-secondary);
}

.thread-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

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

.category-item {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.category-item:hover {
    color: var(--text-primary);
    background-color: var(--hover-bg);
    border-left-color: var(--accent-primary);
}

/* Sidebar Ad */
.sidebar-ad-link {
    display: block;
    transition: opacity 0.2s ease;
}

.sidebar-ad-link:hover {
    opacity: 0.8;
}

.sidebar-ad-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
}

.historical-item {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    font-size: 0.85rem;
    line-height: 1.4;
}

.historical-item:hover {
    color: var(--text-primary);
    background-color: var(--hover-bg);
    border-left-color: var(--accent-primary);
}

.historical-list {
    padding: 0.5rem 0;
}

/* Content */
.content {
    min-height: 600px;
}

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

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

.sort-tab {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.sort-tab:hover,
.sort-tab.active {
    color: var(--text-primary);
    background-color: var(--nav-button-bg);
    backdrop-filter: blur(5px);
}

/* Thread cards */
.thread-feed {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.thread-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.thread-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.thread-card.featured {
    border-color: var(--accent-secondary);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(128, 128, 128, 0.1) 100%);
}

.thread-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.thread-badge {
    background-color: var(--accent-secondary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.thread-category {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    border: 1px solid var(--border-color);
}

.thread-card .thread-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.thread-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.thread-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.thread-stats {
    display: flex;
    gap: 1rem;
}

.stat {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.thread-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.author {
    color: var(--accent-primary);
    font-weight: 500;
}

.timestamp {
    color: var(--text-muted);
}

/* Loading indicator */
.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
}

.loader {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

.loading-indicator p {
    color: var(--text-secondary);
    margin: 0;
}

.loading-indicator button {
    margin-top: 1rem;
}

/* Load more */
.load-more {
    text-align: center;
    margin-top: 3rem;
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-spacer {
    /* Empty spacer to align footer with middle column */
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-section h4 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-section a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

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

/* Responsive design */
@media (max-width: 1200px) {
    .container {
        grid-template-columns: 250px 1fr 250px;
        gap: 1rem;
    }
}

@media (max-width: 992px) {
    .container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .sidebar, .right-sidebar, .footer-spacer {
        display: none;
    }

    .footer .container {
        display: block;
    }

    .header-container {
        padding: 0 1.5rem;
    }

    .nav {
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .header-container {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .logo-section {
        width: 100%;
    }

    .logo-image {
        max-width: 90%;
    }

    .logo {
        font-size: 1.5rem;
        line-height: 1.3;
    }

    .nav {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .nav-link {
        padding: 0.75rem 1rem;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .header-actions {
        width: 100%;
    }

    .header-actions .btn-primary {
        width: 100%;
        min-height: 44px;
    }

    .sort-tabs {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .sort-tab {
        padding: 0.75rem 1rem;
        min-height: 44px;
    }

    .thread-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .thread-stats {
        flex-wrap: wrap;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
    }

    .header {
        padding: 0.75rem 0;
    }

    .header-container {
        padding: 0 0.75rem;
    }

    .logo-image {
        max-width: 85%;
    }

    .logo {
        font-size: 1.2rem;
        line-height: 1.2;
    }

    .theme-toggle {
        padding: 0.5rem;
        min-width: 44px;
        min-height: 44px;
    }

    .nav {
        gap: 0.25rem;
    }

    .nav-link {
        padding: 0.6rem 0.8rem;
        font-size: 0.9rem;
    }

    .btn-primary, .btn-secondary {
        padding: 0.75rem 1rem;
        font-size: 0.95rem;
    }

    .thread-card {
        padding: 1rem;
    }

    .thread-card .thread-title {
        font-size: 1.1rem;
    }

    .thread-excerpt {
        font-size: 0.9rem;
    }

    .main {
        padding: 1rem 0;
    }

    .sort-tabs {
        gap: 0.25rem;
    }

    .sort-tab {
        padding: 0.6rem 0.8rem;
        font-size: 0.85rem;
    }

    .footer {
        padding: 1.5rem 0;
    }

    .footer-section h4 {
        font-size: 0.95rem;
    }

    .footer-section a {
        font-size: 0.9rem;
    }
}