/* ============================================
   Modern Professional Admin Panel Theme
   ============================================ */

:root {
    /* Primary Color Palette */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Secondary Colors */
    --secondary-color: #64748b;
    --secondary-light: #94a3b8;
    
    /* Status Colors */
    --success-color: #10b981;
    --success-light: #34d399;
    --info-color: #3b82f6;
    --info-light: #60a5fa;
    --warning-color: #f59e0b;
    --warning-light: #fbbf24;
    --danger-color: #ef4444;
    --danger-light: #f87171;
    
    /* Neutral Colors */
    --light-bg: #f8fafc;
    --light-border: #e2e8f0;
    --dark-text: #1e293b;
    --muted-text: #64748b;
    --white: #ffffff;
    
    /* Sidebar */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --sidebar-bg: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    --sidebar-hover: rgba(255, 255, 255, 0.1);
    --sidebar-active: rgba(99, 102, 241, 0.2);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* ============================================
   Global Styles
   ============================================ */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.6;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#wrapper {
    min-height: 100vh;
    display: flex;
    position: relative;
}

/* ============================================
   Sidebar Styles
   ============================================ */

#sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    box-shadow: var(--shadow-xl);
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-base);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

#sidebar::-webkit-scrollbar {
    width: 6px;
}

#sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

#sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

#sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

#sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

#sidebar .sidebar-heading {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

#sidebar .sidebar-heading .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    white-space: nowrap;
    overflow: hidden;
}

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

#sidebar .list-group {
    padding: var(--spacing-md) 0;
    list-style: none;
    flex: 1;
    overflow-y: auto;
}

#sidebar .list-group-item {
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.8);
    background: transparent;
    display: flex;
    align-items: center;
    transition: all var(--transition-base);
    margin: 0.25rem var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    position: relative;
    font-weight: 500;
    font-size: 0.95rem;
}

#sidebar .list-group-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--primary-color);
    border-radius: 0 3px 3px 0;
    transition: height var(--transition-base);
}

#sidebar .list-group-item:hover {
    color: var(--white);
    background: var(--sidebar-hover);
    padding-left: calc(var(--spacing-lg) + 0.5rem);
    transform: translateX(4px);
}

#sidebar .list-group-item.active {
    color: var(--white);
    background: var(--sidebar-active);
    border-left: 3px solid var(--primary-color);
}

#sidebar .list-group-item.active::before {
    height: 60%;
}

#sidebar .list-group-item i {
    margin-right: var(--spacing-md);
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

#sidebar.collapsed .list-group-item {
    justify-content: center;
    padding: var(--spacing-md);
    margin: 0.25rem var(--spacing-sm);
}

#sidebar.collapsed .list-group-item i {
    margin-right: 0;
}

#sidebar.collapsed .list-group-item span {
    display: none;
}

#sidebar .list-group-item.text-danger {
    margin-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
}

#sidebar .list-group-item.text-danger:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-light);
}

/* ============================================
   Main Content Wrapper
   ============================================ */

#page-content-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background-color: var(--light-bg);
    transition: margin-left var(--transition-base);
}

#wrapper.sidebar-collapsed #page-content-wrapper {
    margin-left: var(--sidebar-collapsed-width);
}

/* ============================================
   Top Navbar
   ============================================ */

.navbar {
    height: 70px;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--light-border);
    padding: 0 var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: 999;
}

.navbar .btn-link {
    color: var(--muted-text);
    text-decoration: none;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.navbar .btn-link:hover {
    color: var(--primary-color);
    background: var(--light-bg);
}

.navbar .input-group {
    max-width: 300px;
}

.navbar .form-control {
    border: 1px solid var(--light-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.navbar .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.navbar .dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.navbar .dropdown-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.navbar .dropdown-item:hover {
    background: var(--light-bg);
    color: var(--primary-color);
}

.navbar .notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--danger-color);
    color: var(--white);
    border-radius: 10px;
    padding: 2px 6px;
    font-size: 0.7rem;
    font-weight: 600;
    min-width: 18px;
    text-align: center;
}

/* ============================================
   Cards
   ============================================ */

.card {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    background: var(--white);
    transition: all var(--transition-base);
    overflow: hidden;
}

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

.card-header {
    background: var(--white);
    border-bottom: 1px solid var(--light-border);
    padding: var(--spacing-lg);
    font-weight: 600;
    color: var(--dark-text);
}

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

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

/* Stats Cards */
.stats-card {
    border-left: 4px solid var(--primary-color);
    position: relative;
    overflow: hidden;
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, transparent 100%);
    border-radius: 50%;
    transform: translate(30%, -30%);
}

.stats-card.success {
    border-left-color: var(--success-color);
}

.stats-card.info {
    border-left-color: var(--info-color);
}

.stats-card.warning {
    border-left-color: var(--warning-color);
}

.stats-card.danger {
    border-left-color: var(--danger-color);
}

.stats-card .icon {
    font-size: 2.5rem;
    opacity: 0.2;
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
}

/* ============================================
   Forms
   ============================================ */

.form-label {
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    display: block;
}

.form-control,
.form-select {
    border: 1px solid var(--light-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    width: 100%;
}

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

.form-control::placeholder {
    color: var(--muted-text);
    opacity: 0.6;
}

.input-group-text {
    background: var(--light-bg);
    border: 1px solid var(--light-border);
    color: var(--muted-text);
    border-radius: var(--radius-md);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--light-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-check-label {
    margin-left: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.9rem;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

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

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

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-1px);
}

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

.btn-success:hover {
    background: #059669;
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.85rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

/* ============================================
   Tables
   ============================================ */

.table {
    margin-bottom: 0;
    color: var(--dark-text);
}

.table thead th {
    border-top: none;
    background: var(--light-bg);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    padding: var(--spacing-md);
    color: var(--muted-text);
    border-bottom: 2px solid var(--light-border);
}

.table tbody td {
    padding: var(--spacing-md);
    vertical-align: middle;
    border-bottom: 1px solid var(--light-border);
}

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

.table tbody tr:hover {
    background: var(--light-bg);
    transform: scale(1.01);
}

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

/* ============================================
   Badges
   ============================================ */

.badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bg-success {
    background-color: var(--success-color) !important;
}

.bg-warning {
    background-color: var(--warning-color) !important;
}

.bg-danger {
    background-color: var(--danger-color) !important;
}

.bg-info {
    background-color: var(--info-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

/* ============================================
   Modals
   ============================================ */

.modal-content {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    border-bottom: 1px solid var(--light-border);
    padding: var(--spacing-lg);
}

.modal-header.bg-primary {
    background: var(--primary-gradient) !important;
    color: var(--white);
    border-bottom: none;
}

.modal-header.bg-primary .btn-close {
    filter: brightness(0) invert(1);
}

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

.modal-footer {
    border-top: 1px solid var(--light-border);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--light-bg);
}

/* ============================================
   Utilities
   ============================================ */

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.shadow-md {
    box-shadow: var(--shadow-md) !important;
}

.shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

.text-muted {
    color: var(--muted-text) !important;
}

.bg-light {
    background-color: var(--light-bg) !important;
}

.border-light {
    border-color: var(--light-border) !important;
}

/* ============================================
   Animations
   ============================================ */

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

@keyframes slideIn {
    from {
        transform: translateX(-20px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 991.98px) {
    #sidebar {
        left: -100%;
        transition: left var(--transition-base);
    }
    
    #sidebar.open {
        left: 0;
    }
    
    #page-content-wrapper {
        margin-left: 0 !important;
    }
    
    .navbar {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .card-body {
        padding: var(--spacing-md);
    }
    
    .table-responsive {
        font-size: 0.85rem;
    }
    
    .btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.85rem;
    }
}

/* ============================================
   Loading Spinner
   ============================================ */

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

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

/* ============================================
   Search Input
   ============================================ */

.search-input {
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--light-border);
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

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

/* ============================================
   Footer
   ============================================ */

footer {
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--muted-text);
    font-size: 0.85rem;
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--light-border);
}