/* ============================================
   AURIC DASHBOARD - MAIN STYLESHEET
   Professional, modern design with smooth animations
   ============================================ */

/* ============================================
   ROOT VARIABLES & THEME COLORS
   ============================================ */
:root {
    /* Primary Colors - Default (Admin) Theme */
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-dark: #4338ca;

    /* Status Colors */
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* ============================================
   TELSTRA THEME (Non-Admin Users)
   ============================================ */
body[data-theme="telstra"] {
    /* Primary Colors - Telstra Brand */
    --primary-color: #2653F6;       /* Telstra Blue */
    --primary-hover: #1A3D99;       /* Darker Blue */
    --primary-dark: #0F1E3D;        /* Navy Blue */

    /* Secondary Color - Telstra Orange */
    --secondary-color: #E86E53;     /* Telstra Orange */
    --secondary-hover: #D5563F;     /* Darker Orange */
    --secondary-light: #FFA07A;     /* Light Orange */

    /* Status Colors - Adjusted for Telstra palette */
    --success-color: #28A745;       /* Green (keep for online) */
    --danger-color: #DC3545;        /* Red (keep for offline) */
    --warning-color: #FF6B35;       /* Orange-tinted warning */
    --info-color: #2653F6;          /* Telstra Blue */
}

/* Telstra Theme - Device Card Headers (Orange) */
body[data-theme="telstra"] .device-header {
    background: linear-gradient(135deg, #E86E53 0%, #D5563F 100%);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   NAVIGATION BAR
   ============================================ */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: 1.5rem;
}

.nav-logo {
    height: 32px;
    width: auto;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

.nav-link.active {
    background: var(--primary-color);
    color: var(--white);
}

.nav-link.nav-logout {
    color: var(--danger-color);
}

.nav-link.nav-logout:hover {
    background: #fee2e2;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gray-100);
    border-radius: var(--radius-md);
    font-weight: 500;
    color: var(--gray-700);
}

/* ============================================
   FLASH MESSAGES
   ============================================ */
.flash-messages {
    position: fixed;
    top: 80px;
    right: var(--spacing-lg);
    z-index: 9999;
    max-width: 400px;
}

.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.alert-success {
    background: #d1fae5;
    border-left: 4px solid var(--success-color);
    color: #065f46;
}

.alert-danger, .alert-error {
    background: #fee2e2;
    border-left: 4px solid var(--danger-color);
    color: #991b1b;
}

.alert-warning {
    background: #fef3c7;
    border-left: 4px solid var(--warning-color);
    color: #92400e;
}

.alert-info {
    background: #dbeafe;
    border-left: 4px solid var(--info-color);
    color: #1e40af;
}

.alert-icon {
    font-size: 1.25rem;
}

.alert-message {
    flex: 1;
    font-weight: 500;
}

.alert-close {
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    flex: 1;
    padding: var(--spacing-xl);
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

.main-content-full {
    max-width: 100%;
    padding: 0;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--gray-600);
    font-size: 0.875rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-version {
    margin-top: var(--spacing-xs);
    color: var(--gray-400);
}

/* ============================================
   LOGIN PAGE
   ============================================ */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.login-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
    opacity: 0.1;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    background: var(--white);
}

.bg-circle-1 {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -100px;
}

.bg-circle-2 {
    width: 500px;
    height: 500px;
    bottom: -200px;
    left: -150px;
}

.bg-circle-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 10%;
}

.login-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-2xl);
    width: 100%;
    max-width: 450px;
    position: relative;
    z-index: 1;
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.login-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.login-header p {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

.login-form {
    margin-bottom: var(--spacing-lg);
}

.login-info {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.8125rem;
    color: var(--gray-500);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.75rem var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

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

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-block {
    width: 100%;
}

.btn:active {
    transform: translateY(0);
}

/* ============================================
   DASHBOARD
   ============================================ */
.dashboard-container {
    width: 100%;
}

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

.dashboard-header h1 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--gray-900);
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* Statistics Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.875rem;
}

.stat-card-total .stat-icon {
    background: #dbeafe;
    color: var(--info-color);
}

.stat-card-online .stat-icon {
    background: #d1fae5;
    color: var(--success-color);
}

.stat-card-offline .stat-icon {
    background: #fee2e2;
    color: var(--danger-color);
}

.stat-card-warning .stat-icon {
    background: #fef3c7;
    color: var(--warning-color);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-top: var(--spacing-xs);
}

/* Filters Section */
.filters-section {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-xl);
}

.filters-form {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.filter-search {
    flex: 2;
}

.search-input-group {
    display: flex;
    gap: var(--spacing-sm);
}

.search-input-group .form-control {
    flex: 1;
}

.device-status {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-xs);
}

.device-uptime {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.device-uptime i {
    font-size: 0.625rem;
}

/* Devices Grid */
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.device-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.device-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.device-card-link:hover .device-card {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
}

.device-card.device-offline {
    opacity: 0.7;
}

.device-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: var(--spacing-lg);
    color: var(--white);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.device-title h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.device-serial {
    font-size: 0.75rem;
    opacity: 0.9;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-online {
    background: rgb(3, 180, 44);
    color: var(--white);
}

.status-offline {
    background: rgb(179, 2, 2);
    color: var(--white);
}

.status-badge i {
    font-size: 0.5rem;
}

/* Device Info */
.device-info {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.info-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--gray-600);
    font-size: 0.875rem;
}

.info-value {
    font-weight: 600;
    color: var(--gray-900);
    font-size: 0.875rem;
}

/* Info row alignment */
.info-row-left {
    justify-content: flex-start;
}

.info-row-right {
    justify-content: flex-end;
}

/* Battery Indicator */
.battery-indicator {
    width: 100px;
    height: 20px;
    background: var(--gray-200);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}

.battery-fill {
    height: 100%;
    transition: width var(--transition-normal);
    position: relative;
}

.battery-green .battery-fill {
    background: var(--success-color);
}

.battery-yellow .battery-fill {
    background: #eab308;
}

.battery-orange .battery-fill {
    background: var(--warning-color);
}

.battery-red .battery-fill {
    background: var(--danger-color);
}

.battery-gray .battery-fill {
    background: var(--gray-400);
}

.battery-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--gray-700);
}

/* Oil Section */
.oil-section {
    padding: var(--spacing-lg);
}

.oil-section h4 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xs);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
}

.oil-warning {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--warning-color);
    font-size: 0.75rem;
}

.oil-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.oil-slot {
    background: var(--gray-50);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    position: relative;
}

.oil-slot.oil-low {
    background: #fef3c7;
    border: 1px solid var(--warning-color);
}

.oil-slot.oil-empty {
    opacity: 0.5;
}

.oil-slot-number {
    position: absolute;
    top: var(--spacing-xs);
    left: var(--spacing-xs);
    width: 20px;
    height: 20px;
    background: var(--gray-300);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--gray-700);
}

.oil-info {
    margin-top: var(--spacing-md);
}

.oil-name {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.oil-level-bar {
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.oil-level-fill {
    height: 100%;
    transition: width var(--transition-normal);
}

.oil-percentage {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gray-700);
    text-align: right;
}

.oil-empty-text {
    text-align: center;
    color: var(--gray-500);
    font-size: 0.8125rem;
    font-style: italic;
    padding: var(--spacing-sm) 0;
}

/* Device Footer */
.device-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

.firmware-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--gray-600);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.empty-state i {
    font-size: 4rem;
    color: var(--gray-300);
    margin-bottom: var(--spacing-lg);
}

.empty-state h2 {
    font-size: 1.5rem;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.loading-spinner {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
}

.loading-spinner i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

/* Error Page */
.error-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.error-card {
    text-align: center;
    max-width: 500px;
}

.error-icon {
    font-size: 5rem;
    color: var(--danger-color);
    margin-bottom: var(--spacing-lg);
}

.error-code {
    font-size: 4rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.error-title {
    font-size: 1.5rem;
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
}

.error-message {
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
}

.error-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: var(--spacing-md);
    }
    
    .nav-menu {
        width: 100%;
        justify-content: space-between;
        margin-top: var(--spacing-md);
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .filters-form {
        flex-direction: column;
    }
    
    .devices-grid {
        grid-template-columns: 1fr;
    }
    
    .flash-messages {
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .oil-grid {
        grid-template-columns: 1fr;
    }
    
    .login-card {
        padding: var(--spacing-lg);
    }
    
    .error-actions {
        flex-direction: column;
    }
    
    .error-actions .btn {
        width: 100%;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .navbar,
    .filters-section,
    .header-actions,
    .footer {
        display: none !important;
    }
    
    .device-card {
        break-inside: avoid;
    }
}

/* ===================================
   Device Detail Page Styles
   =================================== */

.device-detail-container {
    padding: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

/* Detail Header */
.detail-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--border-color);
    flex-wrap: wrap;
}

.detail-header-left {
    flex-shrink: 0;
}

.detail-header-title {
    flex: 1;
    text-align: center;
}

.detail-header-title h1 {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 2rem;
    color: var(--text-primary);
}

.device-serial-large {
    display: inline-block;
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    background: var(--background);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
}

.detail-header-status {
    flex-shrink: 0;
}

.status-large {
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-lg);
}

/* Detail Content Grid */
.detail-content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.detail-left-column,
.detail-right-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Detail Cards */
.detail-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: var(--spacing-xl);
}

.detail-card h2 {
    margin: 0 0 var(--spacing-lg) 0;
    font-size: 1.25rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.detail-card h2 i {
    color: var(--primary-color);
}

/* Detail Info Rows */
.detail-info-rows {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.detail-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.detail-info-row:hover {
    background-color: var(--background);
}

.detail-label {
    font-weight: 500;
    color: var(--text-secondary);
    flex-shrink: 0;
    min-width: 150px;
}

.detail-value {
    color: var(--text-primary);
    text-align: right;
    word-break: break-word;
}

/* QR Code Card */
.qr-card {
    text-align: center;
}

.qr-code-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

#qrcode {
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    display: inline-block;
}

#qrcode img {
    display: block;
}

.qr-label {
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

/* Assigned Users Placeholder */
.assigned-users-card .placeholder-content {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    color: var(--text-secondary);
}

.placeholder-content i {
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.5;
    margin-bottom: var(--spacing-md);
}

.placeholder-content p {
    margin: var(--spacing-md) 0 var(--spacing-xs) 0;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
}

.placeholder-content small {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Oil Levels in Detail Page */
.oil-levels-card .oil-grid {
    margin-top: var(--spacing-md);
}

.oil-levels-card .oil-level-raw {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    text-align: center;
}

/* Responsive Design for Detail Page */
@media (max-width: 1024px) {
    .detail-content-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .device-detail-container {
        padding: var(--spacing-md);
    }

    .detail-header {
        flex-direction: column;
        text-align: center;
    }

    .detail-header-left,
    .detail-header-status {
        width: 100%;
    }

    .detail-header-title h1 {
        font-size: 1.5rem;
    }

    .detail-card {
        padding: var(--spacing-lg);
    }

    .detail-label {
        min-width: auto;
        margin-bottom: var(--spacing-xs);
    }

    .detail-info-row {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }

    .detail-value {
        text-align: left;
        width: 100%;
    }
}

/* ===================================
   Firmware Management Page Styles
   =================================== */

.firmware-container {
    padding: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

/* Firmware Header */
.firmware-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--border-color);
}

.firmware-header h1 {
    margin: 0;
    font-size: 2rem;
    color: var(--text-primary);
}

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

.mqtt-status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.status-xs {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
}

/* Firmware Cards */
.firmware-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.firmware-card h2 {
    margin: 0 0 var(--spacing-lg) 0;
    font-size: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.firmware-count {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: normal;
}

/* Upload Form */
.upload-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

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

.form-group-full {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.form-group input[type="text"],
.form-group input[type="file"],
.form-group textarea {
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
}

.form-group input[type="file"] {
    padding: var(--spacing-xs);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group small {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Firmware Table */
.firmware-table-container {
    overflow-x: auto;
}

.firmware-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-md);
}

.firmware-table thead {
    background: var(--background);
}

.firmware-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

.firmware-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.firmware-table tbody tr:hover {
    background: var(--background);
}

.firmware-id {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.firmware-table code {
    background: var(--background);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.release-notes-cell {
    max-width: 200px;
}

.release-notes-preview {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.no-notes {
    color: var(--text-muted);
}

.actions-cell {
    white-space: nowrap;
}

.actions-cell .btn {
    margin-right: var(--spacing-xs);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.modal-content form {
    display: flex;
    flex-direction: column;
    min-height: 0;
    flex: 1;
}

.modal-small {
    max-width: 500px;
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: var(--spacing-xl);
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* Firmware Info Box */
.firmware-info-box {
    background: var(--background);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.firmware-info-box h4 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
}

.firmware-info-box p {
    margin: var(--spacing-xs) 0;
}

/* Device Selection */
.device-selection h4 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
}

.no-devices-alert {
    padding: var(--spacing-lg);
    background: #dbeafe;
    border: 1px solid #93c5fd;
    border-radius: var(--radius-md);
    text-align: center;
    color: #1e40af;
}

.no-devices-alert i {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.no-devices-alert p {
    margin: var(--spacing-sm) 0;
}

.no-devices-alert small {
    color: #3b82f6;
}

.device-checkboxes {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.select-all-container {
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.device-checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.device-checkbox-label:hover {
    background: var(--background);
}

.device-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.device-serial-small {
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.device-hardware-badge {
    background: var(--background);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Alerts */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.alert-warning {
    background: #fff3cd;
    border: 1px solid #ffc107;
    color: #856404;
}

.alert i {
    margin-top: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .firmware-container {
        padding: var(--spacing-md);
    }

    .firmware-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

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

    .firmware-table-container {
        overflow-x: scroll;
    }

    .firmware-table {
        min-width: 800px;
    }

    .modal-content {
        width: 95%;
        max-height: 95vh;
    }
}