:root {
    /* Light mode (default) */
    --bg-color: #f7f9fb;
    --text-color: #212529;
    --text-muted: #6c757d;
    --card-bg: #f9fbff;
    --border-color: #dee2e6;
    --primary-color: #0d6efd;
    --success-color: #198754;
    --danger-color: #dc3545;
    --skeleton-from: #f0f0f0;
    --skeleton-via: #e0e0e0;
    --skeleton-to: #f0f0f0;
}

[data-theme="dark"] {
    /* Dark mode */
    --bg-color: #1a1a1a;
    --text-color: #e9ecef;
    --text-muted: #ced4da;
    --card-bg: #2d2d2d;
    --border-color: #495057;
    --primary-color: #3d8bfd;
    --success-color: #28a745;
    --danger-color: #e74c3c;
    --skeleton-from: #2d2d2d;
    --skeleton-via: #3d3d3d;
    --skeleton-to: #2d2d2d;
}

/* Respect system preference if no manual selection */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-color: #1a1a1a;
        --text-color: #e9ecef;
        --text-muted: #ced4da;
        --card-bg: #2d2d2d;
        --border-color: #495057;
        --primary-color: #3d8bfd;
        --success-color: #28a745;
        --danger-color: #e74c3c;
        --skeleton-from: #2d2d2d;
        --skeleton-via: #3d3d3d;
        --skeleton-to: #2d2d2d;
    }
}

html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

a, .btn-link {
    color: #006bb7;
}

.btn-primary {
    color: #fff;
    background-color: #1b6ec2;
    border-color: #1861ac;
}

.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: 1.1rem;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid #e50000;
}

.validation-message {
    color: #e50000;
}

.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;
}

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

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

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

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

/* Skip to content link for accessibility */
.skip-to-content {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 999;
    padding: 1rem 1.5rem;
    background-color: #1b6ec2;
    color: white;
    text-decoration: none;
    border-radius: 0 0 0.25rem 0.25rem;
    font-weight: 600;
}

.skip-to-content:focus {
    left: 50%;
    transform: translateX(-50%);
    outline: 2px solid #258cfb;
    outline-offset: 2px;
}

/* Loading skeleton animations */
.skeleton {
    background: linear-gradient(90deg, var(--skeleton-from) 25%, var(--skeleton-via) 50%, var(--skeleton-to) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: 0.25rem;
}

.skeleton-button {
    height: 3rem;
    width: 100%;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
}

.skeleton-button {
    height: 3rem;
    width: 200px;
    margin: 0 auto;
}

.skeleton-input {
    height: 2.5rem;
    margin-bottom: 1rem;
}

.step-card {
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    background: var(--card-bg);
}

.step-header {
    padding: 0.9rem 1.2rem;
    font-weight: 700;
}

.step-body {
    padding: 1.5rem;
}

/* Dark mode toggle */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.5rem;
    border-radius: 0.25rem;
    transition: background-color 0.2s ease;
}

.theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.theme-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Dark mode adjustments for Bootstrap components */
[data-theme="dark"] .card,
[data-theme="dark"] .card-body {
    background-color: var(--card-bg);
    color: var(--text-color);
    border-color: var(--border-color);
}

[data-theme="dark"] .text-muted {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .step-body .text-muted {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .border,
[data-theme="dark"] .card,
[data-theme="dark"] .list-group-item {
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: #202020;
    color: var(--text-color);
    border-color: var(--border-color);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: #1c1c1c;
    color: var(--text-color);
}

[data-theme="dark"] .bg-light {
    background-color: #2d2d2d !important;
    color: var(--text-color) !important;
}

[data-theme="dark"] .card-header.bg-light {
    background-color: #2d2d2d !important;
    color: var(--text-color) !important;
}

[data-theme="dark"] .navbar-dark .navbar-nav .nav-link {
    color: #f8f9fa;
}

[data-theme="dark"] .navbar-dark .navbar-nav .nav-link:hover {
    color: #ffffff;
}

[data-theme="dark"] .modal-content {
    background-color: var(--card-bg);
    color: var(--text-color);
}

[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-footer {
    border-color: var(--border-color);
}

[data-theme="dark"] .accordion-button {
    background-color: var(--card-bg);
    color: var(--text-color);
}

[data-theme="dark"] .accordion-button:not(.collapsed) {
    color: var(--text-color);
    background-color: #1f1f1f;
}

[data-theme="dark"] .accordion-button::after {
    filter: invert(1);
}

[data-theme="dark"] .accordion-body {
    background-color: var(--card-bg);
    color: var(--text-color);
}

[data-theme="dark"] .table {
    color: var(--text-color);
}

[data-theme="dark"] .table thead {
    color: var(--text-muted);
}

[data-theme="dark"] .table-striped > tbody > tr:nth-of-type(odd) > * {
    color: var(--text-color);
}

[data-theme="dark"] code {
    color: #ffdd57;
}

/* Custom components */
.file-upload-panel {
    border: 1px dashed var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    background: rgba(13, 110, 253, 0.03);
}

[data-theme="dark"] .file-upload-panel {
    background: rgba(61, 139, 253, 0.08);
}

.result-card {
    border-top: 4px solid var(--success-color);
}

.result-stat {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
}

.faq-card {
    border-left: 4px solid var(--primary-color);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.7rem;
    background: rgba(13, 110, 253, 0.08);
    border-radius: 999px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
}

[data-theme="dark"] .hero-badge {
    background: rgba(61, 139, 253, 0.15);
    color: #d8e5ff;
}

/* Cards and layout tweaks */
.card.shadow-sm {
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .card.shadow-sm {
    border-color: var(--border-color);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.25) !important;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--text-color);
}

/* Badges for alerts/stats */
.stat-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
}

.stat-pill.success {
    background: rgba(25, 135, 84, 0.1);
    color: #0f5132;
}

.stat-pill.warning {
    background: rgba(255, 193, 7, 0.15);
    color: #664d03;
}

.stat-pill.danger {
    background: rgba(220, 53, 69, 0.12);
    color: #842029;
}

[data-theme="dark"] .stat-pill.success {
    background: rgba(25, 135, 84, 0.15);
    color: #b8f2d0;
}

[data-theme="dark"] .stat-pill.warning {
    background: rgba(255, 193, 7, 0.2);
    color: #ffe9a6;
}

[data-theme="dark"] .stat-pill.danger {
    background: rgba(220, 53, 69, 0.18);
    color: #ffc0c9;
}

/* Tables inside cards */
.table-card {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
}

.table-card .table {
    margin-bottom: 0;
}

.table-card .table td,
.table-card .table th {
    vertical-align: middle;
}

[data-theme="dark"] .table-card {
    border-color: var(--border-color);
}

/* Alerts tweaks */
[data-theme="dark"] .alert-warning {
    color: #fef3c7;
    background-color: rgba(255, 193, 7, 0.08);
    border-color: rgba(255, 193, 7, 0.2);
}

[data-theme="dark"] .alert-success {
    color: #d1fae5;
    background-color: rgba(25, 135, 84, 0.08);
    border-color: rgba(25, 135, 84, 0.2);
}

[data-theme="dark"] .alert-danger {
    color: #fee2e2;
    background-color: rgba(220, 53, 69, 0.08);
    border-color: rgba(220, 53, 69, 0.2);
}

/* Forms */
.form-label {
    font-weight: 600;
    color: var(--text-color);
}

[data-theme="dark"] .form-label {
    color: var(--text-color);
}

/* Buttons spacing */
.btn-lg {
    padding: 0.85rem 1.2rem;
    font-weight: 600;
}

/* Grid helpers */
.grid-gap-sm {
    row-gap: 0.5rem;
    column-gap: 0.5rem;
}

.grid-gap-md {
    row-gap: 1rem;
    column-gap: 1rem;
}

.grid-gap-lg {
    row-gap: 1.5rem;
    column-gap: 1.5rem;
}

/* Floating cards */
.floating-card {
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .floating-card {
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

/* System dark mode preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .bg-light {
        background-color: #2d2d2d !important;
        color: #e9ecef !important;
    }

    :root:not([data-theme="light"]) .card-header.bg-light {
        background-color: #2d2d2d !important;
        color: #e9ecef !important;
    }

    :root:not([data-theme="light"]) .text-muted {
        color: #ced4da !important;
    }

    :root:not([data-theme="light"]) .step-body .text-muted {
        color: #ced4da !important;
    }
}

/* Responsive padding adjustments */
@media (max-width: 576px) {
    .btn-lg {
        width: 100%;
    }
}