:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --primary-light: #7e8ff0;
    --secondary-color: #6c757d;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --light-color: #f8f9fa;
    --dark-color: #1a202c;
    --background-color: #ffffff;
    --text-color: #4a5568;
    --border-color: #e2e8f0;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --sidebar-width: 260px;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Helvetica Neue', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout - Only apply flex layout to main when NOT in authenticated sidebar layout */
.page {
    display: flex;
    flex-direction: row;
    min-height: 100vh;
    width: 100%;
}

/* Default main styles - will be overridden by .main-content in MainLayout */
main:not(.main-content):not(.main-content-full) {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
}

.content {
    flex: 1;
    width: 100%;
    padding: 0;
}

article.content {
    padding: 0 !important;
}

/* Cards */
.card {
    background: linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07), 0 1px 3px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(102, 126, 234, 0.08);
    margin-bottom: 1.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light), var(--primary-color));
    background-size: 200% 100%;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    box-shadow: 0 12px 24px rgba(102, 126, 234, 0.15), 0 4px 8px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
    border-color: rgba(102, 126, 234, 0.2);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 50%, var(--primary-color) 100%);
    background-size: 200% 100%;
    color: white;
    padding: 1.25rem 1.5rem;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    font-weight: 600;
    font-size: 1.125rem;
    position: relative;
    overflow: hidden;
}

.card-header::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.card:hover .card-header::after {
    left: 100%;
}

.card-body {
    padding: 1.5rem;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.6));
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--dark-color);
    background: linear-gradient(135deg, var(--dark-color), var(--text-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-subtitle {
    font-size: 1rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.card-text {
    color: var(--text-color);
}

/* Buttons */
.btn {
    padding: 0.625rem 1.25rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    font-size: 0.9375rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 50%, var(--primary-color) 100%);
    background-size: 200% 100%;
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4), 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    background-position: right center;
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5), 0 3px 6px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #5a6268 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(108, 117, 125, 0.3);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #5a6268 0%, var(--secondary-color) 100%);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(108, 117, 125, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, var(--success-color) 100%);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, var(--danger-color) 100%);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

.btn-outline-primary {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 1));
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.15);
    position: relative;
}

.btn-outline-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: var(--border-radius);
    z-index: -1;
}

.btn-outline-primary:hover {
    color: white;
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

.btn-outline-primary:hover::after {
    opacity: 1;
}

.btn-outline-secondary {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 1));
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
    box-shadow: 0 2px 8px rgba(108, 117, 125, 0.15);
}

.btn-outline-secondary:hover {
    background: linear-gradient(135deg, var(--secondary-color), #5a6268);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(108, 117, 125, 0.3);
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.125rem;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-lg:hover {
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.5);
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.875rem;
}

.btn-group {
    display: inline-flex;
    gap: 0.5rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn:disabled::before {
    display: none;
}

/* Forms */
.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
    display: block;
}

.form-control {
    width: 100%;
    padding: 0.625rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-select {
    width: 100%;
    padding: 0.625rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

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

.form-check-input {
    margin-right: 0.5rem;
}

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    border-left: 4px solid;
}

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

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

.alert-danger {
    background-color: #fee2e2;
    border-color: var(--danger-color);
    color: #991b1b;
}

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

/* Badges */
.badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.badge:hover::before {
    left: 100%;
}

.bg-primary { 
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light)) !important; 
    color: white; 
}

.bg-secondary { 
    background: linear-gradient(135deg, var(--secondary-color), #5a6268) !important; 
    color: white; 
}

.bg-success { 
    background: linear-gradient(135deg, var(--success-color), #059669) !important; 
    color: white; 
}

.bg-danger { 
    background: linear-gradient(135deg, var(--danger-color), #dc2626) !important; 
    color: white; 
}

.bg-warning { 
    background: linear-gradient(135deg, var(--warning-color), #d97706) !important; 
    color: #000; 
}

.bg-info { 
    background: linear-gradient(135deg, var(--info-color), #2563eb) !important; 
    color: white; 
}

/* Modal */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1040;
    animation: fadeIn 0.2s ease;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1050;
    animation: slideUp 0.3s ease;
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-dialog {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 400px;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

.close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary-color);
    transition: var(--transition);
}

.close:hover {
    color: var(--danger-color);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translate(-50%, -45%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

/* Spinner */
.spinner-border {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner 0.75s linear infinite;
}

.spinner-border-sm {
    width: 0.875rem;
    height: 0.875rem;
}

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

/* Utility Classes */
.d-flex { display: flex; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.align-items-center { align-items: center; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }
.mb-3 { margin-bottom: 1rem; }
.mt-3 { margin-top: 1rem; }
.text-center { text-align: center; }
.text-muted { color: var(--secondary-color); }
.fw-bold { font-weight: 700; }

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    padding: 4rem 2rem;
    border-radius: var(--border-radius-lg);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
}

.display-4 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.lead {
    font-size: 1.25rem;
    opacity: 0.95;
}

/* Responsive */
@media (max-width: 768px) {
    .modal-dialog {
        min-width: auto;
        width: 100%;
    }
    
    .card {
        margin-bottom: 1rem;
    }
}

/* List Group */
.list-group {
    display: flex;
    flex-direction: column;
    padding-left: 0;
    margin-bottom: 0;
}

.list-group-item {
    padding: 1rem 1.25rem;
    border: 1px solid var(--border-color);
    background-color: white;
}

.list-group-item:first-child {
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

.list-group-item:last-child {
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

.list-group-item-success {
    background-color: #d1fae5;
    border-color: #a7f3d0;
}

.list-group-item-danger {
    background-color: #fee2e2;
    border-color: #fecaca;
}

/* Pre/Code */
pre {
    background-color: var(--light-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

code {
    background-color: var(--light-color);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
}