/* =====================================================
   BLAZOR PRODUCT APP - DESIGN SYSTEM (AdminLTE Style)
   ===================================================== */

/* ===== CSS VARIABLES / DESIGN TOKENS ===== */
:root {
    /* Colors - Dark Theme */
    --color-bg-primary: #1a1d21;
    --color-bg-secondary: #212529;
    --color-bg-tertiary: #2c3034;
    --color-bg-card: #343a40;
    --color-bg-sidebar: #1a1d21;
    
    /* Accent Colors */
    --color-primary: #3c8dbc;
    --color-success: #00a65a;
    --color-warning: #f39c12;
    --color-danger: #dd4b39;
    --color-info: #00c0ef;
    
    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #b8c7ce;
    --color-text-muted: #8aa4af;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Typography */
    --font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    
    /* Sidebar */
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 60px;
}

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

html, body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.5;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    min-height: 100vh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: #5fa5d0;
}

/* ===== LAYOUT ===== */
.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--color-bg-sidebar);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: width var(--transition-normal);
}

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

.top-header {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-md) var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content-area {
    padding: var(--spacing-xl);
    flex: 1;
}

/* ===== SIDEBAR COMPONENTS ===== */
.sidebar-brand {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.sidebar-brand-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-info));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.sidebar-brand-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow-y: auto;
}

.nav-section-title {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-top: var(--spacing-md);
}

.nav-item {
    padding: var(--spacing-sm) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
}

.nav-item.active {
    background-color: rgba(60, 141, 188, 0.15);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

.nav-item-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.breadcrumb-item {
    color: var(--color-text-secondary);
}

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

.page-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

/* ===== STAT CARDS ===== */
.stat-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    position: relative;
    overflow: hidden;
}

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

.stat-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
}

.stat-card.primary::before { background-color: var(--color-primary); }
.stat-card.success::before { background-color: var(--color-success); }
.stat-card.warning::before { background-color: var(--color-warning); }
.stat-card.danger::before { background-color: var(--color-danger); }
.stat-card.info::before { background-color: var(--color-info); }

.stat-card-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-card-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: 1;
}

.stat-card.primary .stat-card-value { color: var(--color-primary); }
.stat-card.success .stat-card-value { color: var(--color-success); }
.stat-card.warning .stat-card-value { color: var(--color-warning); }
.stat-card.danger .stat-card-value { color: var(--color-danger); }
.stat-card.info .stat-card-value { color: var(--color-info); }

.stat-card-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    opacity: 0.7;
}

.stat-card.primary .stat-card-icon { background-color: rgba(60, 141, 188, 0.2); color: var(--color-primary); }
.stat-card.success .stat-card-icon { background-color: rgba(0, 166, 90, 0.2); color: var(--color-success); }
.stat-card.warning .stat-card-icon { background-color: rgba(243, 156, 18, 0.2); color: var(--color-warning); }
.stat-card.danger .stat-card-icon { background-color: rgba(221, 75, 57, 0.2); color: var(--color-danger); }
.stat-card.info .stat-card-icon { background-color: rgba(0, 192, 239, 0.2); color: var(--color-info); }

/* ===== CARDS ===== */
.card {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin: 0;
}

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

/* ===== DATA TABLE ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.data-table th {
    background-color: rgba(0, 0, 0, 0.2);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    font-size: var(--font-size-xs);
    letter-spacing: 0.05em;
}

.data-table tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* ===== BADGES ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.badge-primary { background-color: rgba(60, 141, 188, 0.2); color: var(--color-primary); }
.badge-success { background-color: rgba(0, 166, 90, 0.2); color: var(--color-success); }
.badge-warning { background-color: rgba(243, 156, 18, 0.2); color: var(--color-warning); }
.badge-danger { background-color: rgba(221, 75, 57, 0.2); color: var(--color-danger); }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background-color: #2d7ba8;
}

/* ===== STATE COMPONENTS ===== */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.empty-state, .error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) * 2;
    gap: var(--spacing-md);
    color: var(--color-text-muted);
    text-align: center;
}

.empty-state-icon, .error-state-icon {
    font-size: 48px;
    opacity: 0.5;
}

.error-state {
    color: var(--color-danger);
}

/* ===== PRICE FORMATTING ===== */
.price {
    font-weight: 600;
    color: var(--color-success);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stat-cards-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== UTILITIES ===== */
.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* ===== BLAZOR ERROR UI ===== */
#blazor-error-ui {
    background: var(--color-danger);
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
    color: white;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}