/* Main CSS - Base styles and layout */
:root {
    /* OKI Corporate Colors */
    --oki-blue: #0066cc;
    --oki-dark-blue: #004499;
    --oki-light-blue: #3388dd;
    --oki-gray: #f5f5f5;
    --oki-dark-gray: #333333;
    
    /* Dashboard Colors */
    --primary-color: var(--oki-blue);
    --primary-dark: var(--oki-dark-blue);
    --primary-light: var(--oki-light-blue);
    --background-color: #fafafa;
    --surface-color: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border-color: #e0e0e0;
    --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-heavy: 0 8px 24px rgba(0,0,0,0.2);
    
    /* Status Colors */
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --info-color: var(--oki-blue);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Layout */
    --header-height: 80px;
    --nav-height: 60px;
    --sidebar-width: 280px;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--background-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--background-color);
}

/* Header Styles */
.header {
    height: var(--header-height);
    background: linear-gradient(135deg, var(--oki-blue), var(--oki-dark-blue));
    color: white;
    box-shadow: var(--shadow-medium);
    position: relative;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--spacing-xl);
}

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

.logo {
    height: 40px;
    width: auto;
}

.title-section h1 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0;
}

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

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

.language-selector select {
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.3);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
}

.language-selector select option {
    background: var(--oki-dark-blue);
    color: white;
}

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

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--error-color);
}

.status-dot.active {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.last-update {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* Navigation Styles */
.nav-bar {
    height: var(--nav-height);
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--spacing-xl);
}

.nav-tabs {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-tab {
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    position: relative;
}

.nav-tab:hover {
    background: rgba(0,102,204,0.1);
    color: var(--primary-color);
}

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

.alert-badge {
    position: relative;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--error-color);
    color: white;
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.alert-badge:hover {
    transform: scale(1.05);
}

.alert-count::before {
    content: '';
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-xl);
    overflow-y: auto;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-overlay.show {
    display: flex;
}

.loading-content {
    background: var(--surface-color);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-heavy);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

/* Alerts Panel */
.alerts-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100%;
    background: var(--surface-color);
    box-shadow: var(--shadow-heavy);
    transition: right 0.3s ease;
    z-index: 1001;
    display: flex;
    flex-direction: column;
}

.alerts-panel.open {
    right: 0;
}

.alerts-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--primary-color);
    color: white;
}

.close-alerts {
    background: none;
    border: none;
    color: white;
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    transition: background 0.2s ease;
}

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

.alerts-content {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

/* Utility Classes */
.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-error { color: var(--error-color); }
.text-info { color: var(--info-color); }
.text-muted { color: var(--text-muted); }

/* Responsive Design */
@media (max-width: 1200px) {
    .header-content {
        padding: 0 var(--spacing-lg);
    }
    
    .nav-content {
        padding: 0 var(--spacing-lg);
    }
    
    .main-content {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .header-controls {
        gap: var(--spacing-md);
        flex-wrap: wrap;
    }
    
    .nav-tabs {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .nav-tab {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .alerts-panel {
        width: 100%;
        right: -100%;
    }
}

@media (max-width: 480px) {
    :root {
        --header-height: 100px;
        --nav-height: 50px;
    }
    
    .logo-section {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .title-section h1 {
        font-size: var(--font-size-lg);
    }
    
    .subtitle {
        font-size: var(--font-size-xs);
    }
}