/* ====================================
   Versions Page Styles
   ==================================== */

/* Back Button */
.back-btn, .mobile-back-btn {
    background: var(--accent-color-light);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    text-decoration: none;
}

.back-btn:hover, .mobile-back-btn:hover {
    background: var(--accent-hover-light) !important;
    transform: translateY(-1px);
    opacity: 1 !important;
    visibility: visible !important;
    color: white !important;
}

body[data-theme='dark'] .back-btn {
    background: var(--accent-color-dark);
    color: white;
}

body[data-theme='dark'] .back-btn:hover {
    background: var(--accent-hover-dark) !important;
    color: white !important;
    opacity: 1 !important;
    visibility: visible !important;
}

.mobile-back-btn {
    padding: 0.5rem;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    justify-content: center;
}

/* Systems Overview */
.systems-overview {
    margin-bottom: 2rem;
}

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

.overview-card {
    background: var(--card-bg-light);
    border: 1px solid var(--border-color-light);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

body[data-theme='dark'] .overview-card {
    background: var(--card-bg-dark);
    border-color: var(--border-color-dark);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.overview-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

body[data-theme='dark'] .overview-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.overview-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.overview-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.overview-icon.operational {
    background: var(--success-glow-light);
    color: var(--success-color-light);
}

body[data-theme='dark'] .overview-icon.operational {
    background: var(--success-glow-dark);
    color: var(--success-color-dark);
}

.overview-icon.warning {
    background: var(--warning-glow-light);
    color: var(--warning-color-light);
}

body[data-theme='dark'] .overview-icon.warning {
    background: var(--warning-glow-dark);
    color: var(--warning-color-dark);
}

.overview-icon.info {
    background: var(--info-glow-light);
    color: var(--info-color-light);
}

body[data-theme='dark'] .overview-icon.info {
    background: var(--info-glow-dark);
    color: var(--info-color-dark);
}

.overview-icon.error {
    background: var(--error-glow-light);
    color: var(--error-color-light);
}

body[data-theme='dark'] .overview-icon.error {
    background: var(--error-glow-dark);
    color: var(--error-color-dark);
}

.overview-content {
    flex: 1;
}

.overview-content h3 {
    margin: 0 0 0.25rem;
    color: var(--text-primary-light);
    font-size: 1rem;
    font-weight: 600;
}

body[data-theme='dark'] .overview-content h3 {
    color: var(--text-primary-dark);
}

.overview-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color-light);
    margin-bottom: 0.25rem;
}

body[data-theme='dark'] .overview-number {
    color: var(--accent-color-dark);
}

.overview-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary-light);
    font-weight: 500;
}

body[data-theme='dark'] .overview-label {
    color: var(--text-secondary-dark);
}

.system-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.8rem;
    white-space: nowrap;
}

.system-badge.development {
    background: var(--warning-glow-light);
    color: var(--warning-color-light);
}

body[data-theme='dark'] .system-badge.development {
    background: var(--warning-glow-dark);
    color: var(--warning-color-dark);
}

.system-badge.active {
    background: var(--success-glow-light);
    color: var(--success-color-light);
}

body[data-theme='dark'] .system-badge.active {
    background: var(--success-glow-dark);
    color: var(--success-color-dark);
}

.system-badge.maintenance {
    background: var(--error-glow-light);
    color: var(--error-color-light);
}

body[data-theme='dark'] .system-badge.maintenance {
    background: var(--error-glow-dark);
    color: var(--error-color-dark);
}

.systems-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: var(--bg-secondary-light);
    border-radius: 12px;
    border: 1px solid var(--border-color-light);
}

body[data-theme='dark'] .stat-item {
    background: var(--bg-secondary-dark);
    border-color: var(--border-color-dark);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color-light);
    margin-bottom: 0.25rem;
}

body[data-theme='dark'] .stat-number {
    color: var(--accent-color-dark);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary-light);
    font-weight: 500;
}

body[data-theme='dark'] .stat-label {
    color: var(--text-secondary-dark);
}

/* Systems Changes */
.systems-changes {
    margin-bottom: 2rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-header h3 {
    margin: 0;
    color: var(--text-primary-light);
    font-size: 1.3rem;
    font-weight: 600;
}

body[data-theme='dark'] .section-header h3 {
    color: var(--text-primary-dark);
}

.filter-tabs {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-secondary-light);
    padding: 0.25rem;
    border-radius: 12px;
    border: 1px solid var(--border-color-light);
}

body[data-theme='dark'] .filter-tabs {
    background: var(--bg-secondary-dark);
    border-color: var(--border-color-dark);
}

.filter-tab {
    background: none;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary-light);
    cursor: pointer;
    transition: all 0.2s ease;
}

body[data-theme='dark'] .filter-tab {
    color: var(--text-secondary-dark);
}

.filter-tab.active {
    background: var(--accent-color-light);
    color: white;
}

body[data-theme='dark'] .filter-tab.active {
    background: var(--accent-color-dark);
}

.filter-tab:hover:not(.active) {
    background: var(--accent-glow-light);
    color: var(--accent-color-light);
}

body[data-theme='dark'] .filter-tab:hover:not(.active) {
    background: var(--accent-glow-dark);
    color: var(--accent-color-dark);
}

/* Systems Timeline */
.systems-timeline {
    position: relative;
    padding-right: 2rem;
}

.system-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    position: relative;
}

.system-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.system-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--border-color-light);
    border: 3px solid var(--bg-primary-light);
    position: relative;
    z-index: 2;
}

body[data-theme='dark'] .system-dot {
    background: var(--border-color-dark);
    border-color: var(--bg-primary-dark);
}

.system-dot.development {
    background: var(--warning-color-light);
    border-color: var(--warning-color-light);
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2);
}

body[data-theme='dark'] .system-dot.development {
    background: var(--warning-color-dark);
    border-color: var(--warning-color-dark);
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.3);
}

.system-dot.active {
    background: var(--success-color-light);
    border-color: var(--success-color-light);
    box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2);
}

body[data-theme='dark'] .system-dot.active {
    background: var(--success-color-dark);
    border-color: var(--success-color-dark);
    box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.3);
}

.system-dot.maintenance {
    background: var(--error-color-light);
    border-color: var(--error-color-light);
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.2);
}

body[data-theme='dark'] .system-dot.maintenance {
    background: var(--error-color-dark);
    border-color: var(--error-color-dark);
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.3);
}

.system-line {
    width: 2px;
    height: 100%;
    background: var(--border-color-light);
    margin-top: 0.5rem;
}

body[data-theme='dark'] .system-line {
    background: var(--border-color-dark);
}

.system-content {
    flex: 1;
    background: var(--card-bg-light);
    border: 1px solid var(--border-color-light);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

body[data-theme='dark'] .system-content {
    background: var(--card-bg-dark);
    border-color: var(--border-color-dark);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.system-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.system-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.system-icon {
    width: 40px;
    height: 40px;
    background: var(--accent-glow-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color-light);
    font-size: 1.1rem;
    flex-shrink: 0;
}

body[data-theme='dark'] .system-icon {
    background: var(--accent-glow-dark);
    color: var(--accent-color-dark);
}

.system-details h4 {
    margin: 0 0 0.25rem;
    color: var(--text-primary-light);
    font-size: 1.1rem;
    font-weight: 600;
}

body[data-theme='dark'] .system-details h4 {
    color: var(--text-primary-dark);
}

.system-date {
    color: var(--text-secondary-light);
    font-size: 0.8rem;
}

body[data-theme='dark'] .system-date {
    color: var(--text-secondary-dark);
}

.system-changes {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.change-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.change-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.change-item.feature .change-icon {
    background: var(--success-glow-light);
    color: var(--success-color-light);
}

body[data-theme='dark'] .change-item.feature .change-icon {
    background: var(--success-glow-dark);
    color: var(--success-color-dark);
}

.change-item.improvement .change-icon {
    background: var(--warning-glow-light);
    color: var(--warning-color-light);
}

body[data-theme='dark'] .change-item.improvement .change-icon {
    background: var(--warning-glow-dark);
    color: var(--warning-color-dark);
}

.change-item.fix .change-icon {
    background: var(--error-glow-light);
    color: var(--error-color-light);
}

body[data-theme='dark'] .change-item.fix .change-icon {
    background: var(--error-glow-dark);
    color: var(--error-color-dark);
}

.change-content h5 {
    margin: 0 0 0.25rem;
    color: var(--text-primary-light);
    font-size: 0.9rem;
    font-weight: 600;
}

body[data-theme='dark'] .change-content h5 {
    color: var(--text-primary-dark);
}

.change-content p {
    margin: 0;
    color: var(--text-secondary-light);
    font-size: 0.8rem;
    line-height: 1.4;
}

body[data-theme='dark'] .change-content p {
    color: var(--text-secondary-dark);
}

/* Systems Summary */
.systems-summary {
    margin-bottom: 2rem;
}

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

.summary-card {
    background: var(--card-bg-light);
    border: 1px solid var(--border-color-light);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

body[data-theme='dark'] .summary-card {
    background: var(--card-bg-dark);
    border-color: var(--border-color-dark);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.summary-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

body[data-theme='dark'] .summary-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.summary-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.summary-card.development .summary-icon {
    background: var(--warning-glow-light);
    color: var(--warning-color-light);
}

body[data-theme='dark'] .summary-card.development .summary-icon {
    background: var(--warning-glow-dark);
    color: var(--warning-color-dark);
}

.summary-card.active .summary-icon {
    background: var(--success-glow-light);
    color: var(--success-color-light);
}

body[data-theme='dark'] .summary-card.active .summary-icon {
    background: var(--success-glow-dark);
    color: var(--success-color-dark);
}

.summary-card.maintenance .summary-icon {
    background: var(--error-glow-light);
    color: var(--error-color-light);
}

body[data-theme='dark'] .summary-card.maintenance .summary-icon {
    background: var(--error-glow-dark);
    color: var(--error-color-dark);
}

.summary-card.testing .summary-icon {
    background: var(--accent-glow-light);
    color: var(--accent-color-light);
}

body[data-theme='dark'] .summary-card.testing .summary-icon {
    background: var(--accent-glow-dark);
    color: var(--accent-color-dark);
}

.summary-content h4 {
    margin: 0 0 0.25rem;
    color: var(--text-primary-light);
    font-size: 0.9rem;
    font-weight: 600;
}

body[data-theme='dark'] .summary-content h4 {
    color: var(--text-primary-dark);
}

.summary-content p {
    margin: 0 0 0.25rem;
    color: var(--text-secondary-light);
    font-size: 0.8rem;
    font-weight: 500;
}

body[data-theme='dark'] .summary-content p {
    color: var(--text-secondary-dark);
}

.summary-detail {
    color: var(--text-tertiary-light);
    font-size: 0.7rem;
    line-height: 1.3;
}

body[data-theme='dark'] .summary-detail {
    color: var(--text-tertiary-dark);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .overview-card {
        padding: 1.5rem;
    }
    
    .overview-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .overview-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .overview-content h2 {
        font-size: 1.2rem;
    }
    
    .systems-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .stat-item {
        padding: 0.75rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .filter-tabs {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .systems-timeline {
        padding-right: 1rem;
    }
    
    .system-item {
        gap: 1rem;
    }
    
    .system-content {
        padding: 1rem;
    }
    
    .system-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .system-info {
        gap: 0.75rem;
    }
    
    .system-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .change-item {
        gap: 0.75rem;
    }
    
    .change-icon {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }
    
    .summary-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .summary-card {
        padding: 1rem;
    }
    
    .summary-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
}

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

.system-item {
    animation: fadeInUp 0.6s ease forwards;
}

.system-item:nth-child(1) { animation-delay: 0.1s; }
.system-item:nth-child(2) { animation-delay: 0.2s; }
.system-item:nth-child(3) { animation-delay: 0.3s; }
.system-item:nth-child(4) { animation-delay: 0.4s; }
.system-item:nth-child(5) { animation-delay: 0.5s; }
.system-item:nth-child(6) { animation-delay: 0.6s; }

/* Hover Effects */
.system-content:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

body[data-theme='dark'] .system-content:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}