/* ================================================
   Dashboard CSS - Fleet Monitor Dashboard Styles
   ================================================ */

/* Header Styles */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-white);
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.logo-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.app-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-white);
}

.app-title .icon {
    font-size: var(--font-size-3xl);
}

.app-subtitle {
    margin: 0;
    font-size: var(--font-size-sm);
    opacity: 0.9;
    color: var(--text-white);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-actions .btn {
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text-white);
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.header-actions .btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.header-actions .btn-primary {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
    border-color: transparent;
}

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

/* Main Content */
.main-content {
    padding: var(--spacing-xl) 0;
    min-height: calc(100vh - 120px);
}

/* Fleet Statistics */
.fleet-stats {
    margin-bottom: var(--spacing-2xl);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
}

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

.stat-icon {
    font-size: var(--font-size-3xl);
    opacity: 0.8;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
    margin-top: var(--spacing-xs);
}

/* Fleet Overview Section */
.fleet-overview {
    background-color: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-light);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
}

.section-title {
    margin: 0;
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.section-title::before {
    content: '🚢';
    font-size: var(--font-size-xl);
}

.section-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

/* Vessel Grid */
.vessels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.vessel-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.vessel-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.vessel-card.status-online {
    border-left: 4px solid var(--success-color);
}

.vessel-card.status-warning {
    border-left: 4px solid var(--warning-color);
}

.vessel-card.status-offline {
    border-left: 4px solid var(--danger-color);
    opacity: 0.7;
}

.vessel-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

.vessel-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.vessel-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.vessel-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-indicator.online {
    background-color: var(--success-color);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

.status-indicator.warning {
    background-color: var(--warning-color);
    box-shadow: 0 0 8px rgba(245, 158, 11, 0.4);
}

.status-indicator.offline {
    background-color: var(--danger-color);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

.vessel-info {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.vessel-body {
    padding: var(--spacing-lg);
}

.usage-summary {
    margin-bottom: var(--spacing-lg);
}

.usage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.usage-amount {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.usage-quota {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.usage-progress {
    margin-bottom: var(--spacing-md);
}

.usage-breakdown {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.breakdown-item {
    text-align: center;
    padding: var(--spacing-sm);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

.breakdown-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.breakdown-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.breakdown-item.critical .breakdown-value {
    color: var(--danger-color);
}

.breakdown-item.operations .breakdown-value {
    color: var(--warning-color);
}

.breakdown-item.general .breakdown-value {
    color: var(--info-color);
}

.vessel-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-light);
    background-color: var(--bg-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.device-count {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.last-updated {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* Empty and Loading States */
.loading-state,
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.loading-state .loading-spinner {
    margin-bottom: var(--spacing-lg);
}

.empty-state {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--border-medium);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.empty-state p {
    margin-bottom: var(--spacing-lg);
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

/* Form Styles */
.form-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: var(--spacing-lg);
}

.tab-btn {
    background: none;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}

.tab-btn.active,
.tab-btn:hover {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn var(--transition-normal) ease-in-out;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.form-section {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.form-section legend {
    padding: 0 var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

/* File Upload */
.upload-area {
    border: 2px dashed var(--border-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.05);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.6;
}

.upload-area h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.upload-area p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    margin-top: var(--spacing-md);
}

.file-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
}

.file-size {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Responsive Grid Views */
.vessels-grid.list-view {
    grid-template-columns: 1fr;
}

.vessels-grid.list-view .vessel-card {
    display: grid;
    grid-template-columns: 300px 1fr auto;
    grid-template-rows: auto;
    align-items: center;
}

.vessels-grid.list-view .vessel-header {
    border-bottom: none;
    border-right: 1px solid var(--border-light);
}

.vessels-grid.list-view .vessel-body {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.vessels-grid.list-view .usage-breakdown {
    display: flex;
    gap: var(--spacing-md);
}

.vessels-grid.list-view .breakdown-item {
    min-width: 80px;
}

/* Animation Classes */
.vessel-card.updating {
    position: relative;
    overflow: hidden;
}

.vessel-card.updating::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(59, 130, 246, 0.2),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    100% {
        left: 100%;
    }
}

/* Notification Styles */
.notification {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

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

.notification.success {
    background-color: var(--success-color);
    color: var(--text-white);
}

.notification.error {
    background-color: var(--danger-color);
    color: var(--text-white);
}

.notification.warning {
    background-color: var(--warning-color);
    color: var(--text-white);
}

.notification.info {
    background-color: var(--info-color);
    color: var(--text-white);
}

/* Tooltip Styles */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-dark);
    color: var(--text-white);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 1000;
}

.tooltip:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1e293b;
        --bg-secondary: #0f172a;
        --bg-tertiary: #334155;
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        --border-light: #334155;
        --border-medium: #475569;
        --border-dark: #64748b;
    }
    
    .vessel-card {
        background-color: var(--bg-primary);
    }
    
    .stat-card {
        background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
    }
}