/* ==========================================================================
   CSS Custom Properties — Design Tokens 2026
   ========================================================================== */

:root {
    --surface-0: #0f172a;
    --surface-1: #111827;
    --surface-2: #1e293b;
    --surface-3: #334155;
    --surface-4: #475569;
    --border-subtle: rgba(148, 163, 184, 0.12);
    --border-default: rgba(148, 163, 184, 0.18);
    --border-strong: rgba(148, 163, 184, 0.28);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --accent-bg: rgba(96, 165, 250, 0.08);
    --success: #34d399;
    --danger: #f87171;
    --warning: #fbbf24;
    --radius-sm: 0.375rem;
    --radius-md: 0.625rem;
    --radius-lg: 0.875rem;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Base
   ========================================================================== */

html, body {
    font-family: 'Inter', 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--surface-0);
    color: var(--text-primary);
    letter-spacing: 0.1px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a, .btn-link {
    color: var(--accent);
    transition: color var(--transition-fast);
}

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

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

.btn {
    border-radius: var(--radius-md);
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: all var(--transition-fast);
}

.btn-primary {
    color: #fff;
    background-color: #2563eb;
    border-color: #1d4ed8;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.30);
}

.btn-primary:hover {
    background-color: #3b82f6;
    border-color: #2563eb;
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.40);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--surface-3);
    border-color: var(--border-default);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--surface-4);
    border-color: var(--border-strong);
    color: #fff;
}

.btn-danger {
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.35);
    transform: translateY(-1px);
}

.btn-success {
    box-shadow: 0 4px 14px rgba(34, 197, 94, 0.25);
}

.btn-success:hover {
    box-shadow: 0 6px 20px rgba(34, 197, 94, 0.35);
    transform: translateY(-1px);
}

.btn-sm {
    border-radius: var(--radius-sm);
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

.content {
    padding-top: 1.35rem;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--success);
}

.invalid {
    outline: 1px solid var(--danger);
}

.validation-message {
    color: var(--danger);
    font-size: 0.825rem;
    margin-top: 0.3rem;
}

/* ==========================================================================
   Tables — Modern dark theme
   ========================================================================== */

.table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-primary);
    --bs-table-border-color: var(--border-subtle);
    --bs-table-hover-bg: rgba(96, 165, 250, 0.06);
    --bs-table-hover-color: var(--text-primary);
    --bs-table-striped-bg: rgba(148, 163, 184, 0.04);
    --bs-table-striped-color: var(--text-primary);
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
    font-size: 0.875rem;
}

.table > :not(caption) > * > * {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    vertical-align: middle;
}

.table > thead {
    position: sticky;
    top: 0;
    z-index: 1;
}

.table > thead > tr > th,
.table > thead.table-light > tr > th {
    background-color: var(--surface-2) !important;
    color: var(--text-secondary) !important;
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-bottom: 2px solid var(--border-default) !important;
    white-space: nowrap;
    padding: 0.625rem 1rem;
}

.table > thead > tr > th:first-child {
    border-top-left-radius: var(--radius-md);
}

.table > thead > tr > th:last-child {
    border-top-right-radius: var(--radius-md);
}

.table > tbody > tr {
    transition: background-color var(--transition-fast);
}

.table-hover > tbody > tr:hover > * {
    background-color: var(--bs-table-hover-bg) !important;
    color: var(--text-primary) !important;
}

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

.table > tbody > tr > td {
    color: var(--text-primary);
}

.table-secondary > td,
.table-secondary > th,
tr.table-secondary > td,
tr.table-secondary > th {
    background-color: rgba(148, 163, 184, 0.06) !important;
    color: var(--text-muted) !important;
}

.table-responsive {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--surface-1);
    box-shadow: var(--shadow-sm);
}

.table-sm > :not(caption) > * > * {
    padding: 0.5rem 0.75rem;
}

/* ==========================================================================
   Forms — Modern dark theme
   ========================================================================== */

.form-control,
.form-select {
    background-color: var(--surface-2);
    border: 1px solid var(--border-default);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    padding: 0.625rem 0.875rem;
    font-size: 0.9rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

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

.form-control:hover,
.form-select:hover {
    border-color: var(--border-strong);
    background-color: rgba(30, 41, 59, 0.8);
}

.form-control:focus,
.form-select:focus {
    background-color: var(--surface-2);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.15), 0 0 0 1px var(--accent);
    outline: none;
}

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--surface-3);
    opacity: 0.6;
    color: var(--text-muted);
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%2394a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
}

.form-label {
    color: var(--text-secondary);
    font-size: 0.825rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    margin-bottom: 0.375rem;
}

.form-text {
    color: var(--text-muted) !important;
    font-size: 0.775rem;
}

.form-floating > .form-control,
.form-floating > .form-select {
    background-color: var(--surface-2);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    height: calc(3.25rem + 2px);
}

.form-floating > label {
    color: var(--text-muted);
    padding: 0.75rem 0.875rem;
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label,
.form-floating > .form-select ~ label {
    color: var(--accent);
    opacity: 0.85;
}

.form-floating > .form-control:focus,
.form-floating > .form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.15), 0 0 0 1px var(--accent);
}

.form-check-input {
    background-color: var(--surface-2);
    border: 1.5px solid var(--border-strong);
    transition: all var(--transition-fast);
}

.form-check-input:checked {
    background-color: #2563eb;
    border-color: #2563eb;
}

.form-check-label {
    color: var(--text-primary);
}

.input-group-text {
    background-color: var(--surface-3);
    border: 1px solid var(--border-default);
    color: var(--text-secondary);
}

textarea.form-control {
    min-height: 5rem;
}

.validation-summary-errors {
    background-color: rgba(248, 113, 113, 0.08);
    border: 1px solid rgba(248, 113, 113, 0.25);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    color: var(--danger);
    font-size: 0.875rem;
}

/* ==========================================================================
   Cards — Glass-morphism dark style
   ========================================================================== */

.card {
    background-color: var(--surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-normal);
    overflow: hidden;
}

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

.card-header {
    background-color: var(--surface-2);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.875rem 1.25rem;
    color: var(--text-primary);
    font-weight: 600;
}

.card-body {
    padding: 1.25rem;
    color: var(--text-primary);
}

.card-footer {
    background-color: var(--surface-2);
    border-top: 1px solid var(--border-subtle);
}

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

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

/* ==========================================================================
   Nav Tabs — Dark theme
   ========================================================================== */

.nav-tabs {
    border-bottom: 2px solid var(--border-subtle);
    gap: 0.25rem;
}

.nav-tabs .nav-link {
    color: var(--text-muted);
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    padding: 0.625rem 1rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    margin-bottom: -2px;
}

.nav-tabs .nav-link:hover {
    color: var(--text-primary);
    border-bottom-color: var(--border-strong);
    background-color: rgba(148, 163, 184, 0.06);
}

.nav-tabs .nav-link.active {
    color: var(--accent) !important;
    background-color: transparent !important;
    border-color: transparent !important;
    border-bottom: 2px solid var(--accent) !important;
}

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

.badge {
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 0.3em 0.65em;
    border-radius: var(--radius-sm);
}

.badge.bg-primary {
    background-color: rgba(37, 99, 235, 0.18) !important;
    color: #93c5fd !important;
    border: 1px solid rgba(37, 99, 235, 0.25);
}

.badge.bg-info {
    background-color: rgba(14, 165, 233, 0.15) !important;
    color: #7dd3fc !important;
    border: 1px solid rgba(14, 165, 233, 0.25);
}

.badge.bg-success {
    background-color: rgba(34, 197, 94, 0.15) !important;
    color: #86efac !important;
    border: 1px solid rgba(34, 197, 94, 0.25);
}

.badge.bg-secondary {
    background-color: rgba(148, 163, 184, 0.12) !important;
    color: var(--text-secondary) !important;
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.badge.bg-danger {
    background-color: rgba(239, 68, 68, 0.15) !important;
    color: #fca5a5 !important;
    border: 1px solid rgba(239, 68, 68, 0.25);
}

.badge.bg-warning {
    background-color: rgba(245, 158, 11, 0.15) !important;
    color: #fcd34d !important;
    border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge.bg-info.text-dark {
    color: #7dd3fc !important;
}

/* ==========================================================================
   Alerts
   ========================================================================== */

.alert {
    border-radius: var(--radius-md);
    border: 1px solid;
    font-size: 0.875rem;
}

.alert-danger {
    background-color: rgba(248, 113, 113, 0.08);
    border-color: rgba(248, 113, 113, 0.2);
    color: #fca5a5;
}

.alert-success {
    background-color: rgba(52, 211, 153, 0.08);
    border-color: rgba(52, 211, 153, 0.2);
    color: #6ee7b7;
}

.alert-info {
    background-color: rgba(96, 165, 250, 0.08);
    border-color: rgba(96, 165, 250, 0.2);
    color: #93c5fd;
}

.alert-warning {
    background-color: rgba(251, 191, 36, 0.08);
    border-color: rgba(251, 191, 36, 0.2);
    color: #fcd34d;
}

.alert .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* ==========================================================================
   Headings
   ========================================================================== */

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

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

/* ==========================================================================
   Scrollbar (Webkit)
   ========================================================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface-1);
}

::-webkit-scrollbar-thumb {
    background: var(--surface-3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--surface-4);
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
    border-radius: var(--radius-md);
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: var(--border-strong);
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--text-muted);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ==========================================================================
   Utility overrides for dark theme
   ========================================================================== */

.bg-white {
    color: #0f172a;
}

.bg-white .text-dark,
.bg-white.text-dark {
    color: #0f172a !important;
}

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

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

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

hr {
    border-color: var(--border-subtle);
    opacity: 0.5;
}

::selection {
    background-color: rgba(96, 165, 250, 0.3);
    color: #fff;
}