/* =========================================================================
   Design tokens
   ========================================================================= */
:root {
    --app-bg: #f8fafc;
    --app-surface: #ffffff;
    --app-surface-muted: #f8fafc;
    --app-border: #e2e8f0;
    --app-border-strong: #cbd5e1;
    --app-text: #0f172a;
    --app-text-muted: #475569;
    --app-text-subtle: #94a3b8;
    --app-accent: #3b82f6;
    --app-accent-strong: #1d4ed8;
    --app-success-bg: #ecfdf5;
    --app-success-fg: #065f46;
    --app-error-bg: #fef2f2;
    --app-error-fg: #991b1b;
    --app-radius: 8px;
    --app-radius-sm: 4px;
    --app-radius-lg: 10px;
    --app-shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04);
    --app-shadow-modal: 0 20px 40px rgba(15, 23, 42, 0.25);
}

html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: var(--app-text);
}

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 {
    margin: 0 0 0.6rem 0;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--app-text);
}

h1:focus {
    outline: none;
}

.app-page-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin: 0 0 0.6rem 0;
}

.app-page-head h1 {
    margin: 0;
}

.app-doc-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.83rem;
    font-weight: 600;
    color: var(--app-accent-strong);
    text-decoration: none;
    border: 1px solid var(--app-border-strong);
    border-radius: 999px;
    background: var(--app-surface);
    padding: 0.22rem 0.55rem;
    white-space: nowrap;
}

.app-doc-link::before {
    content: "?";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1rem;
    height: 1rem;
    border-radius: 999px;
    background: #dbeafe;
    color: #1e40af;
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1;
}

.app-doc-link:hover {
    border-color: var(--app-accent);
    background: #eff6ff;
    color: var(--app-accent-strong);
}

.app-doc-link:hover::before {
    background: #bfdbfe;
}

.app-doc-link:focus-visible {
    outline: 2px solid #93c5fd;
    outline-offset: 2px;
}

.app-doc-link--compact {
    padding: 0.18rem 0.48rem;
    font-size: 0.8rem;
}

@media (max-width: 700px) {
    .app-page-head {
        flex-wrap: wrap;
    }
}

/* =========================================================================
   Common page-level building blocks
   ========================================================================= */

/* Section: card-like surface used to group related controls on a page. */
.app-section {
    margin: 1.25rem 0 1.5rem;
    padding: 1rem 1.15rem;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
}

.app-section h2 {
    margin: 0 0 0.85rem 0;
    font-size: 1.05rem;
    color: var(--app-text);
}

.app-section-intro {
    margin: 0 0 1rem 0;
    color: var(--app-text-muted);
    font-size: 0.88rem;
    line-height: 1.45;
}

.app-section-intro code,
.app-inline-code {
    background: #f1f5f9;
    padding: 0.05rem 0.35rem;
    border-radius: 3px;
    font-size: 0.82rem;
}

/* Note / hint banners */
.app-note {
    margin: 0 0 0.75rem 0;
    padding: 0.5rem 0.75rem;
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: 6px;
    color: #9a3412;
    font-size: 0.85rem;
}

.app-hint {
    margin: 0.5rem 0 0;
    font-size: 0.8rem;
    color: #64748b;
}

/* Field grid + field control */
.app-fields-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem;
}

.app-field {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: #334155;
}

.app-field input,
.app-field select,
.app-field textarea {
    padding: 0.35rem 0.5rem;
    border: 1px solid var(--app-border-strong);
    border-radius: var(--app-radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
}

.app-field input.is-invalid,
.app-field select.is-invalid {
    border-color: #dc2626;
    background: #fef2f2;
}

.app-field-error {
    color: #b91c1c;
    font-size: 0.75rem;
}

.app-meta {
    margin: 0;
    font-size: 0.78rem;
    color: var(--app-text-subtle);
}

/* Action row (buttons aligned horizontally with wrap) */
.app-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

/* Status pill (success / error feedback after operations) */
.app-status {
    display: inline-block;
    margin-top: 0.6rem;
    font-size: 0.8rem;
    padding: 0.2rem 0.5rem;
    border-radius: var(--app-radius-sm);
}

.app-status.ok { background: var(--app-success-bg); color: var(--app-success-fg); }
.app-status.error { background: var(--app-error-bg); color: var(--app-error-fg); }

/* Master page-level status pill (used in headings of Project / PVT / Network pages). */
.app-master-status {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-left: 0.6rem;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    line-height: 1.4;
    border: 1px solid transparent;
    vertical-align: middle;
    white-space: nowrap;
    cursor: default;
}
.app-master-status--ok {
    background: #16a34a;
    color: #ffffff;
    border-color: #15803d;
}
.app-master-status--warn {
    background: #fef3c7;
    color: #92400e;
    border-color: #fde68a;
}
.app-master-status-icon {
    font-size: 0.85rem;
    line-height: 1;
}

/* Card surface used in grids (Start tiles, PVT slots, etc.) */
.app-card {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    padding: 1rem 1.1rem;
    transition: border-color 120ms, box-shadow 120ms, transform 120ms;
}

.app-card:hover {
    border-color: var(--app-accent);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

.app-card-button {
    text-align: left;
    cursor: pointer;
    font: inherit;
    color: inherit;
}

.app-card-button:hover { transform: translateY(-1px); }

.app-card h2 {
    margin: 0 0 0.4rem 0;
    font-size: 1.05rem;
    color: var(--app-text);
}

.app-card p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--app-text-muted);
}

/* Modal overlay + dialog */
.app-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.app-modal-dialog {
    background: var(--app-surface);
    border-radius: var(--app-radius-lg);
    box-shadow: var(--app-shadow-modal);
    width: min(420px, calc(100vw - 2rem));
    padding: 1.25rem 1.35rem 1rem;
    color: var(--app-text);
}

.app-modal-dialog h2 {
    margin: 0 0 0.4rem 0;
    font-size: 1.05rem;
}

.app-modal-dialog p {
    margin: 0;
    color: var(--app-text-muted);
}

.app-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 1rem;
}

.app-modal-actions .btn { min-width: 6rem; }

/* =========================================================================
   App navigation bar (global so it applies to NavLink-rendered anchors)
   ========================================================================= */
.app-nav {
    display: flex;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0 1rem;
    background: #ffffff;
    border-bottom: 1px solid var(--app-border);
    overflow-x: auto;
}

.app-nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 0.9rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--app-text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: color 120ms, border-color 120ms, background 120ms;
}

.app-nav-link:hover {
    color: var(--app-text);
    background: #f1f5f9;
    text-decoration: none;
}

.app-nav-link.active {
    color: var(--app-accent-strong);
    border-bottom-color: var(--app-accent);
}

/* Subtle status backgrounds for nav links that summarize page validity. */
.app-nav-link--warn {
    background: #fef2f2;
}

.app-nav-link--warn:hover {
    background: #fee2e2;
}

.app-nav-link--ok {
    background: transparent;
}

.app-nav-link--ok:hover {
    background: #f1f5f9;
}

.app-nav-link--running {
    background: #eff6ff;
    color: #1d4ed8;
}

.app-nav-link--running:hover {
    background: #dbeafe;
}

.app-nav-icon {
    font-size: 1rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    color: currentColor;
}

.app-nav-icon--ok {
    color: #16a34a;
}

.app-sim-icon {
    display: block;
}

.app-sim-icon-play {
    stroke-width: 2;
}

.app-nav-spinner {
    width: 0.9rem;
    height: 0.9rem;
    border-radius: 50%;
    border: 2px solid rgba(37, 99, 235, 0.25);
    border-top-color: #2563eb;
    animation: app-nav-spin 0.7s linear infinite;
    box-shadow: 0 0 0 1px rgba(255,255,255,0.5) inset;
}

@keyframes app-nav-spin {
    to { transform: rotate(360deg); }
}

/* =========================================================================
   Blazor / framework defaults
   ========================================================================= */

.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;
}