:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;
    --secondary: #64748b;
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --warning: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    --border: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
}

html, body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 1.875rem;
    letter-spacing: -0.025em;
}

h3 {
    font-size: 1.25rem;
}

h1:focus {
    outline: none;
}

a, .btn-link {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover, .btn-link:hover {
    color: var(--primary-hover);
}

/* Modern Button Styles */
.btn {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: all 0.15s ease;
    border: none;
    font-size: 0.875rem;
}

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

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

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

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

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

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

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

.btn-secondary:hover {
    background-color: var(--surface-hover);
    border-color: var(--text-muted);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

/* Modern Form Styles */
.form-label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
    font-size: 0.875rem;
}

.form-control {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    transition: all 0.15s ease;
    background-color: var(--surface);
}

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

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

.form-check-input {
    width: 1.125rem;
    height: 1.125rem;
    border: 1.5px solid var(--border);
    border-radius: 0.25rem;
    transition: all 0.15s ease;
}

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

.form-check-input:focus {
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Modern Table Styles */
.table {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.table thead {
    background-color: var(--surface-hover);
}

.table thead th {
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

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

.table tbody tr:hover {
    background-color: var(--surface-hover);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: transparent;
}

.table-striped tbody tr:nth-of-type(odd):hover {
    background-color: var(--surface-hover);
}

/* Modern Card Styles */
.card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: box-shadow 0.15s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

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

/* Content Area */
.content {
    padding-top: 1.5rem;
    padding-bottom: 2rem;
}

/* Status Badges */
.badge {
    font-weight: 500;
    padding: 0.375rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
}

.badge-success {
    background-color: #dcfce7;
    color: #166534;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

/* Form Section Styling */
.form-section {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-top: 1.5rem;
}

/* Validation */
.valid.modified:not([type=checkbox]) {
    outline: none;
    border-color: var(--success);
}

.invalid {
    outline: none;
    border-color: var(--danger);
}

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

/* Error UI */
#blazor-error-ui {
    background: #fef2f2;
    border-top: 2px solid var(--danger);
    bottom: 0;
    box-shadow: var(--shadow-lg);
    display: none;
    left: 0;
    padding: 1rem 1.5rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
    color: var(--danger);
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 1rem;
    top: 0.75rem;
}

/* Loading Progress */
.loading-progress {
    position: relative;
    display: block;
    width: 8rem;
    height: 8rem;
    margin: 20vh auto 1rem auto;
}

.loading-progress circle {
    fill: none;
    stroke: var(--border);
    stroke-width: 0.5rem;
    transform-origin: 50% 50%;
    transform: rotate(-90deg);
}

.loading-progress circle:last-child {
    stroke: var(--primary);
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
    transition: stroke-dasharray 0.05s ease-in-out;
}

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: 600;
    color: var(--text-secondary);
    inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
}

.loading-progress-text:after {
    content: var(--blazor-load-percentage-text, "Loading");
}

/* Utility Classes */
.text-muted {
    color: var(--text-muted) !important;
}

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

/* Responsive adjustments */
@media (max-width: 640px) {
    .table thead th,
    .table tbody td {
        padding: 0.75rem 0.5rem;
        font-size: 0.8125rem;
    }

    h1 {
        font-size: 1.5rem;
    }
}

/* =====================
   Layout — MainLayout
   ===================== */
.page {
    position: relative;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    background-color: var(--background);
}

.sidebar {
    background: linear-gradient(180deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
}

.top-row {
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    justify-content: flex-end;
    height: 3.5rem;
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.top-row a, .top-row .btn-link {
    white-space: nowrap;
    margin-left: 1.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    transition: color 0.15s ease;
}

.top-row a:hover, .top-row .btn-link:hover {
    color: var(--primary);
    text-decoration: none;
}

@media (min-width: 768px) {
    .page {
        flex-direction: row;
    }

    .sidebar {
        width: 260px;
        height: 100vh;
        position: sticky;
        top: 0;
        box-shadow: var(--shadow-lg);
    }

    .top-row {
        position: sticky;
        top: 0;
        z-index: 1100;
    }
}

/* =====================
   Layout — NavMenu
   ===================== */
.navbar-toggler {
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 0.5rem;
    padding: 0.5rem;
}

.navbar-toggler:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.sidebar .top-row {
    height: 4rem;
    background-color: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: white !important;
}

.nav-scrollable {
    display: block;
    padding: 1rem 0;
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
}

.nav-scrollable.collapse {
    display: none;
}

.nav-item {
    font-size: 0.9rem;
    padding: 0.25rem 1rem;
}

.nav-item:first-of-type {
    padding-top: 0.5rem;
}

.nav-item:last-of-type {
    padding-bottom: 0.5rem;
}

.nav-item a,
.nav-item button.nav-link {
    color: rgba(255, 255, 255, 0.8);
    border-radius: 0.5rem;
    height: 2.75rem;
    display: flex;
    align-items: center;
    padding: 0 1rem;
    font-weight: 500;
    transition: all 0.15s ease;
}

.nav-item a.active {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-item a:hover,
.nav-item button.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    transform: translateX(4px);
}

.nav-divider {
    height: 1px;
    background-color: rgba(255, 255, 255, 0.1);
    margin: 0.75rem 1.5rem;
}

.user-avatar-mobile {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    flex-shrink: 0;
}

@media (min-width: 768px) {
    .navbar-toggler {
        display: none;
    }

    .nav-scrollable {
        display: block;
    }

    .nav-scrollable.collapse {
        display: block;
    }
}