/* =====================================================
   VelTech Lab Client Portal - Modern Dark Theme
   ===================================================== */

:root {
    /* Dark Theme Colors - Cyberpunk inspired */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: #151520;
    --bg-hover: #1e1e2d;
    
    /* Accent Colors - Electric Teal & Magenta */
    --accent-primary: #00d4aa;
    --accent-secondary: #ff3366;
    --accent-tertiary: #7c3aed;
    --accent-glow: rgba(0, 212, 170, 0.3);
    
    /* Text Colors */
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    
    /* Status Colors */
    --success: #00d4aa;
    --warning: #ffb830;
    --error: #ff3366;
    --info: #3b82f6;
    
    /* Borders */
    --border-color: #2a2a3a;
    --border-focus: var(--accent-primary);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);
    
    /* Sizing - Responsive */
    --sidebar-width: 260px;
    --sidebar-collapsed: 70px;
    --header-height: 70px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Container Max Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
    
    /* Fluid Typography - clamp(min, preferred, max) */
    --font-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
    --font-sm: clamp(0.8125rem, 0.75rem + 0.3vw, 0.875rem);
    --font-base: clamp(0.875rem, 0.8rem + 0.4vw, 1rem);
    --font-lg: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
    --font-xl: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
    --font-2xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --font-3xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
    --font-4xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
    --font-5xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.5rem);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

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

/* =====================================================
   Sidebar
   ===================================================== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: width var(--transition-normal);
}

/* Collapsed sidebar (desktop) */
.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar.collapsed .logo-text {
    display: none;
}

.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 0.875rem 0.75rem;
}

.sidebar.collapsed .nav-link span {
    display: none;
}

.sidebar.collapsed .nav-link i {
    margin: 0;
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
}

.sidebar.collapsed .sidebar-toggle {
    position: absolute;
    right: 0.75rem;
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--bg-primary);
    box-shadow: var(--shadow-glow);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--text-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-toggle {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.sidebar-toggle:hover {
    color: var(--accent-primary);
    background: var(--bg-hover);
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 0;
    overflow-y: auto;
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin: 0.25rem 0.75rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.875rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    font-weight: 500;
}

.nav-link i {
    font-size: 1.125rem;
    width: 24px;
    text-align: center;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.nav-link.active {
    color: var(--accent-primary);
    background: rgba(0, 212, 170, 0.1);
    border-left: 3px solid var(--accent-primary);
    margin-left: -3px;
}

.sidebar-footer {
    padding: 1rem 0.75rem;
    border-top: 1px solid var(--border-color);
}

.logout-form {
    margin-top: 0.5rem;
}

.logout-btn {
    width: 100%;
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
}

.logout-btn:hover {
    color: var(--error) !important;
}

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

/* Expanded content when sidebar collapsed */
.main-content.expanded {
    margin-left: var(--sidebar-collapsed);
}

.top-header {
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
}

.page-title {
    font-size: var(--font-2xl);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.header-search {
    position: relative;
}

.header-search i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.header-search input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    padding: 0.625rem 1rem 0.625rem 2.5rem;
    color: var(--text-primary);
    width: 250px;
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

.header-search input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.header-search input::placeholder {
    color: var(--text-muted);
}

.notification-btn {
    position: relative;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.notification-btn:hover {
    color: var(--accent-primary);
    background: var(--bg-hover);
}

.notification-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent-secondary);
    color: white;
    font-size: 0.625rem;
    font-weight: 600;
    padding: 0.125rem 0.375rem;
    border-radius: 50px;
    min-width: 16px;
    text-align: center;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.header-user:hover {
    background: var(--bg-hover);
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-tertiary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.user-company {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.content-wrapper {
    flex: 1;
    padding: var(--space-xl);
    width: 100%;
}

/* =====================================================
   Cards & Widgets
   ===================================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.card-header {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    flex-wrap: wrap;
}

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

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

.card-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    transition: var(--transition-fast);
}

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

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.stat-icon.primary {
    background: rgba(0, 212, 170, 0.15);
    color: var(--accent-primary);
}

.stat-icon.secondary {
    background: rgba(255, 51, 102, 0.15);
    color: var(--accent-secondary);
}

.stat-icon.tertiary {
    background: rgba(124, 58, 237, 0.15);
    color: var(--accent-tertiary);
}

.stat-icon.info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--info);
}

.stat-icon.warning {
    background: rgba(255, 184, 48, 0.15);
    color: var(--warning);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: var(--font-3xl);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

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

.stat-change {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    margin-top: 0.5rem;
}

.stat-change.positive {
    color: var(--success);
}

.stat-change.negative {
    color: var(--error);
}

/* =====================================================
   Tables
   ===================================================== */
.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table tbody tr {
    transition: var(--transition-fast);
}

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

.data-table td {
    color: var(--text-primary);
    font-size: 0.9375rem;
}

/* =====================================================
   Buttons
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-base);
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-fast);
    font-family: inherit;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), #00b894);
    color: var(--bg-primary);
}

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

.btn-danger:hover {
    background: #e62e5c;
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-sm);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-lg);
}

/* =====================================================
   Badges & Status
   ===================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-success {
    background: rgba(0, 212, 170, 0.15);
    color: var(--success);
}

.badge-warning {
    background: rgba(255, 184, 48, 0.15);
    color: var(--warning);
}

.badge-error {
    background: rgba(255, 51, 102, 0.15);
    color: var(--error);
}

.badge-info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--info);
}

.badge-neutral {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

/* Priority Badges */
.priority-low { background: rgba(0, 212, 170, 0.15); color: var(--success); }
.priority-medium { background: rgba(59, 130, 246, 0.15); color: var(--info); }
.priority-high { background: rgba(255, 184, 48, 0.15); color: var(--warning); }
.priority-critical { background: rgba(255, 51, 102, 0.15); color: var(--error); }

/* Status Indicators */
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-dot.operational { background: var(--success); }
.status-dot.degraded { background: var(--warning); }
.status-dot.outage { background: var(--error); }
.status-dot.maintenance { background: var(--info); }

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

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

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 500;
    font-size: var(--font-sm);
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: var(--space-md);
    font-size: var(--font-base);
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0a0b0' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-check-input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-primary);
}

/* =====================================================
   Alerts
   ===================================================== */
.alert {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--space-lg);
    font-size: var(--font-base);
}

.alert i {
    font-size: 1.125rem;
}

.alert-success {
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.3);
    color: var(--success);
}

.alert-error {
    background: rgba(255, 51, 102, 0.1);
    border: 1px solid rgba(255, 51, 102, 0.3);
    color: var(--error);
}

.alert-warning {
    background: rgba(255, 184, 48, 0.1);
    border: 1px solid rgba(255, 184, 48, 0.3);
    color: var(--warning);
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--info);
}

/* =====================================================
   Dashboard Specific
   ===================================================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-lg);
}

.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-12 { grid-column: span 12; }

.welcome-banner {
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.welcome-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-glow), transparent);
    pointer-events: none;
}

.welcome-title {
    font-size: var(--font-3xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.welcome-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-base);
}

/* Recent Items List */
.item-list {
    list-style: none;
}

.item-list li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.item-list li:last-child {
    border-bottom: none;
}

.item-info {
    flex: 1;
}

.item-title {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.item-title a {
    color: inherit;
    text-decoration: none;
}

.item-title a:hover {
    color: var(--accent-primary);
}

.item-meta {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Service Status Grid */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-md);
}

.service-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: var(--transition-fast);
}

.service-item:hover {
    border-color: var(--accent-primary);
}

.service-name {
    font-weight: 500;
    font-size: 0.875rem;
}

.service-uptime {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* =====================================================
   Ticket Specific
   ===================================================== */
.ticket-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.ticket-id {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-primary);
    font-size: 0.875rem;
}

.ticket-timeline {
    margin-top: 2rem;
}

.timeline-item {
    display: flex;
    gap: 1rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.timeline-item:last-child {
    border-bottom: none;
}

.timeline-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.timeline-content {
    flex: 1;
}

.timeline-author {
    font-weight: 600;
    color: var(--text-primary);
}

.timeline-date {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.timeline-message {
    margin-top: 0.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* =====================================================
   Invoice Specific
   ===================================================== */
.invoice-summary {
    display: flex;
    justify-content: space-between;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
    margin-bottom: 2rem;
}

.invoice-total {
    text-align: right;
}

.invoice-total .amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.invoice-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* =====================================================
   Knowledge Base
   ===================================================== */
.kb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.kb-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition-fast);
}

.kb-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.kb-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.kb-card-title a {
    color: var(--text-primary);
    text-decoration: none;
}

.kb-card-title a:hover {
    color: var(--accent-primary);
}

.kb-card-summary {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.kb-card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* =====================================================
   Login Page
   ===================================================== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--bg-primary);
    position: relative;
}

.auth-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at top left, rgba(0, 212, 170, 0.1), transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(124, 58, 237, 0.1), transparent 50%);
    pointer-events: none;
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-2xl);
    position: relative;
    z-index: 1;
}

.auth-lang-switcher {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    z-index: 10;
}

.auth-lang-switcher .language-switcher {
    position: relative;
}

.auth-lang-switcher .language-dropdown {
    right: 0;
    left: auto;
    top: 100%;
    margin-top: var(--space-xs);
}

.auth-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo .logo-icon {
    width: 60px;
    height: 60px;
    font-size: 1.75rem;
    margin: 0 auto 1rem;
}

.auth-logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--text-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-logo p {
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.auth-form .form-group {
    margin-bottom: 1.25rem;
}

.auth-form .btn-primary {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.auth-footer a {
    color: var(--accent-primary);
    text-decoration: none;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Validation Errors */
.validation-summary-errors {
    background: rgba(255, 51, 102, 0.1);
    border: 1px solid rgba(255, 51, 102, 0.3);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    margin-bottom: 1.5rem;
    color: var(--error);
}

.validation-summary-errors ul {
    margin: 0;
    padding-left: 1.25rem;
}

.field-validation-error {
    color: var(--error);
    font-size: 0.8125rem;
    margin-top: 0.25rem;
}

.input-validation-error {
    border-color: var(--error) !important;
}

/* =====================================================
   Landing Page
   ===================================================== */
.landing-page {
    min-height: 100vh;
}

.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.landing-nav .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.landing-nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.landing-nav-links a:not(.btn) {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.landing-nav-links a:not(.btn):hover {
    color: var(--accent-primary);
}

.landing-mobile-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.landing-mobile-toggle:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

@media (max-width: 768px) {
    .landing-nav .container {
        padding: 0.75rem 1rem;
    }
    
    .landing-nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-150%);
        opacity: 0;
        transition: all var(--transition-normal);
        z-index: 99;
    }
    
    .landing-nav-links.open {
        transform: translateY(0);
        opacity: 1;
    }
    
    .landing-nav-links a:not(.btn) {
        padding: 0.75rem 0;
        width: 100%;
        text-align: center;
    }
    
    .landing-nav-links .btn {
        width: 100%;
        justify-content: center;
    }
    
    .landing-nav-links .language-switcher {
        width: 100%;
    }
    
    .landing-nav-links .language-btn {
        width: 100%;
        justify-content: center;
    }
    
    .landing-nav-links .language-dropdown {
        left: 0;
        right: 0;
    }
    
    .landing-mobile-toggle {
        display: block;
    }
}

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 4rem;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(0, 212, 170, 0.15), transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(124, 58, 237, 0.15), transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.3);
    border-radius: 50px;
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: var(--font-5xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

/* =====================================================
   Filter Bar
   ===================================================== */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
}

.filter-bar .form-control {
    width: auto;
    min-width: 150px;
}

/* =====================================================
   Empty State
   ===================================================== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* =====================================================
   Pagination
   ===================================================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.pagination a,
.pagination span {
    padding: 0.5rem 0.875rem;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.pagination a {
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
}

.pagination a:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.pagination .active {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border: 1px solid var(--accent-primary);
}

.pagination .disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* =====================================================
   Language Switcher
   ===================================================== */
.language-switcher {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: inherit;
}

.language-btn:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
}

.language-btn i.fa-globe {
    color: var(--accent-primary);
}

.language-btn .lang-code {
    font-weight: 600;
}

.language-btn .lang-arrow {
    font-size: 0.625rem;
    transition: transform var(--transition-fast);
}

.language-switcher.open .lang-arrow {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 160px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1000;
    overflow: hidden;
}

.language-switcher.open .language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-dropdown form {
    margin: 0;
}

.language-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

.language-option:hover {
    background: var(--bg-hover);
}

.language-option.active {
    background: rgba(0, 212, 170, 0.1);
    color: var(--accent-primary);
}

.language-option .flag-icon {
    font-size: 1.25rem;
}

.language-option i.fa-check {
    margin-left: auto;
    color: var(--accent-primary);
}

/* =====================================================
   Mobile Menu Overlay
   ===================================================== */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* =====================================================
   Responsive Design - Perfect Proportions
   ===================================================== */

/* Extra Large Screens (1400px+) */
@media (min-width: 1400px) {
    .content-wrapper {
        max-width: var(--container-xl);
        margin-left: auto;
        margin-right: auto;
        padding: var(--space-2xl);
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .dashboard-grid {
        gap: var(--space-xl);
    }
}

/* Large Screens (1200px - 1399px) */
@media (max-width: 1399px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-lg);
    }
}

/* Medium-Large Screens (1200px) */
@media (max-width: 1200px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .col-8, .col-6, .col-4 {
        grid-column: span 12;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }
    
    .kb-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Tablet Landscape (992px) */
@media (max-width: 992px) {
    :root {
        --sidebar-width: 240px;
    }
    
    .sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 42px;
        height: 42px;
        border-radius: var(--border-radius-sm);
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
    }
    
    .mobile-toggle:hover {
        border-color: var(--accent-primary);
        color: var(--accent-primary);
    }
    
    .header-search {
        display: none;
    }
    
    .page-title {
        font-size: var(--font-xl);
    }
    
    .header-right {
        gap: var(--space-sm);
    }
    
    .content-wrapper {
        padding: var(--space-lg);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .invoice-summary {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    
    .invoice-total {
        text-align: center;
    }
}

/* Tablet Portrait (768px) */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-md);
    }
    
    .stat-card {
        padding: var(--space-md);
        flex-direction: column;
        text-align: center;
    }
    
    .stat-icon {
        margin: 0 auto var(--space-sm);
    }
    
    .stat-value {
        font-size: var(--font-3xl);
    }
    
    .stat-label {
        font-size: var(--font-sm);
    }
    
    .hero-title {
        font-size: var(--font-4xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-base);
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--space-sm);
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    .auth-card {
        padding: var(--space-lg);
        margin: var(--space-md);
        max-width: 100%;
    }
    
    .content-wrapper {
        padding: var(--space-md);
    }
    
    .top-header {
        padding: 0 var(--space-md);
    }
    
    .user-info {
        display: none;
    }
    
    .user-avatar {
        width: 36px;
        height: 36px;
        font-size: var(--font-xs);
    }
    
    .kb-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .kb-card {
        padding: var(--space-md);
    }
    
    .card {
        border-radius: var(--border-radius-sm);
    }
    
    .card-body {
        padding: var(--space-md);
    }
    
    .card-header {
        padding: var(--space-md);
        flex-direction: column;
        gap: var(--space-sm);
        align-items: stretch;
    }
    
    .card-header .btn {
        width: 100%;
        justify-content: center;
    }
    
    .table-container {
        margin: 0 calc(var(--space-md) * -1);
        padding: 0 var(--space-md);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .data-table {
        min-width: 600px;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-sm);
        white-space: nowrap;
    }
    
    /* Hide less important columns on mobile */
    .data-table .hide-mobile {
        display: none;
    }
    
    .language-btn .lang-code {
        display: none;
    }
    
    .language-btn {
        padding: var(--space-sm);
        width: 40px;
        height: 40px;
        justify-content: center;
    }
    
    .language-btn .lang-arrow {
        display: none;
    }
    
    .notification-btn {
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .welcome-banner {
        padding: var(--space-lg);
    }
    
    .welcome-title {
        font-size: var(--font-2xl);
    }
    
    .welcome-subtitle {
        font-size: var(--font-sm);
    }
    
    .btn {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-sm);
    }
    
    .btn-lg {
        padding: var(--space-md) var(--space-lg);
        font-size: var(--font-base);
    }
    
    .service-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-sm);
    }
    
    .service-item {
        padding: var(--space-sm);
        flex-direction: column;
        text-align: center;
    }
    
    .filter-bar {
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-md);
    }
    
    .filter-bar .form-control {
        width: 100%;
        min-width: unset;
    }
    
    .filter-bar .btn {
        width: 100%;
    }
    
    .ticket-header {
        flex-direction: column;
        gap: var(--space-md);
        align-items: stretch;
    }
    
    .alert {
        padding: var(--space-md);
        font-size: var(--font-sm);
    }
    
    .badge {
        font-size: var(--font-xs);
        padding: 0.2rem 0.5rem;
    }
}

/* Mobile Large (576px) */
@media (max-width: 576px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
    }
    
    .header-left {
        gap: var(--space-sm);
    }
    
    .page-title {
        font-size: var(--font-lg);
        max-width: 150px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
}

/* Mobile Small (480px) */
@media (max-width: 480px) {
    :root {
        --header-height: 56px;
    }
    
    .page-title {
        font-size: var(--font-base);
        max-width: 120px;
    }
    
    .sidebar-header {
        padding: 0 var(--space-md);
    }
    
    .logo-text {
        font-size: var(--font-base);
    }
    
    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: var(--font-base);
    }
    
    .nav-link {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-sm);
    }
    
    .nav-link i {
        font-size: var(--font-base);
    }
    
    .auth-container {
        padding: var(--space-md);
    }
    
    .auth-card {
        padding: var(--space-md);
        margin: 0;
    }
    
    .auth-logo h1 {
        font-size: var(--font-2xl);
    }
    
    .auth-logo .logo-icon {
        width: 48px;
        height: 48px;
        font-size: var(--font-xl);
    }
    
    .auth-logo p {
        font-size: var(--font-sm);
    }
    
    .form-group {
        margin-bottom: var(--space-md);
    }
    
    .form-label {
        font-size: var(--font-sm);
        margin-bottom: var(--space-xs);
    }
    
    .form-control {
        padding: var(--space-sm) var(--space-md);
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    .hero-section {
        padding: 5rem var(--space-md) var(--space-xl);
    }
    
    .hero-badge {
        font-size: var(--font-xs);
        padding: var(--space-xs) var(--space-sm);
    }
    
    .hero-title {
        font-size: var(--font-3xl);
    }
    
    .language-dropdown {
        right: 0;
        left: auto;
        min-width: 140px;
    }
    
    .language-option {
        padding: var(--space-sm);
        font-size: var(--font-sm);
    }
    
    .item-list li {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
        padding: var(--space-sm) 0;
    }
    
    .item-title {
        font-size: var(--font-sm);
    }
    
    .item-meta {
        font-size: var(--font-xs);
    }
    
    .timeline-item {
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-md) 0;
    }
    
    .timeline-avatar {
        width: 32px;
        height: 32px;
        font-size: var(--font-xs);
    }
    
    .timeline-content {
        width: 100%;
    }
    
    .timeline-author {
        font-size: var(--font-sm);
    }
    
    .timeline-message {
        font-size: var(--font-sm);
    }
    
    .empty-state {
        padding: var(--space-xl) var(--space-md);
    }
    
    .empty-state i {
        font-size: var(--font-4xl);
    }
    
    .empty-state h3 {
        font-size: var(--font-xl);
    }
    
    .empty-state p {
        font-size: var(--font-sm);
    }
    
    .pagination {
        gap: var(--space-xs);
        flex-wrap: wrap;
    }
    
    .pagination a,
    .pagination span {
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--font-sm);
    }
    
    .mobile-toggle {
        width: 38px;
        height: 38px;
    }
}

/* Extra Small (360px) */
@media (max-width: 360px) {
    :root {
        --space-md: 0.75rem;
        --space-lg: 1rem;
    }
    
    .page-title {
        max-width: 100px;
        font-size: var(--font-sm);
    }
    
    .header-right {
        gap: var(--space-xs);
    }
    
    .language-btn,
    .notification-btn,
    .mobile-toggle {
        width: 36px;
        height: 36px;
    }
    
    .user-avatar {
        width: 32px;
        height: 32px;
    }
    
    .hero-title {
        font-size: var(--font-2xl);
    }
    
    .btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--font-xs);
    }
    
    .btn-lg {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-sm);
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .nav-link,
    .language-btn,
    .language-option,
    .notification-btn,
    .mobile-toggle,
    .data-table tbody tr {
        min-height: 44px;
    }
    
    .form-control,
    select.form-control {
        font-size: 16px; /* Prevents zoom on iOS */
        min-height: 44px;
    }
    
    .form-check-input {
        width: 22px;
        height: 22px;
    }
}

/* Landscape Mode - Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .hero-section {
        min-height: auto;
        padding: var(--space-xl) var(--space-md);
    }
    
    .auth-container {
        align-items: flex-start;
        padding-top: var(--space-md);
    }
    
    .sidebar {
        overflow-y: auto;
    }
}

/* High DPI Screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo-icon,
    .stat-icon {
        image-rendering: -webkit-optimize-contrast;
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .top-header,
    .mobile-toggle,
    .language-switcher,
    .notification-btn,
    .sidebar-overlay {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .content-wrapper {
        padding: 0 !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card {
        border: 1px solid #ccc;
        box-shadow: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #666;
        --text-secondary: #ddd;
        --text-muted: #aaa;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Dark mode preference (already dark, but ensures consistency) */
@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
    }
}