:root {
    --brand: #4f46e5;
    --brand-dark: #4338ca;
    --brand-soft: #eef2ff;
    --ink: #111827;
    --ink-muted: #6b7280;
    --surface: #ffffff;
    --canvas: #f7f7fb;
    --line: #e5e7eb;
    --radius: 14px;
}

html, body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--canvas);
    color: var(--ink);
}

a {
    color: var(--brand);
    text-decoration: none;
}

a:hover {
    color: var(--brand-dark);
    text-decoration: underline;
}

h1:focus {
    outline: none;
}

.fbc-icon {
    flex: 0 0 auto;
}

/* ---------- Buttons ---------- */

.btn-primary {
    --bs-btn-bg: var(--brand);
    --bs-btn-border-color: var(--brand);
    --bs-btn-hover-bg: var(--brand-dark);
    --bs-btn-hover-border-color: var(--brand-dark);
    --bs-btn-active-bg: var(--brand-dark);
    --bs-btn-active-border-color: var(--brand-dark);
    --bs-btn-disabled-bg: var(--brand);
    --bs-btn-disabled-border-color: var(--brand);
}

.btn-outline-primary {
    --bs-btn-color: var(--brand);
    --bs-btn-border-color: var(--brand);
    --bs-btn-hover-bg: var(--brand);
    --bs-btn-hover-border-color: var(--brand);
    --bs-btn-active-bg: var(--brand-dark);
    --bs-btn-active-border-color: var(--brand-dark);
}

.form-control:focus, .form-select:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 0.2rem rgba(79, 70, 229, 0.15);
}

/* ---------- Shell ---------- */

.app-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-main {
    flex: 1 0 auto;
}

.app-navbar {
    background: linear-gradient(120deg, #1e1b4b 0%, #312e81 55%, #4338ca 100%);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06), 0 6px 24px rgba(17, 24, 39, 0.12);
}

.app-navbar .navbar-brand,
.app-navbar .nav-link {
    color: rgba(255, 255, 255, 0.9);
}

.app-navbar .navbar-brand {
    font-weight: 650;
    letter-spacing: -0.01em;
}

.app-navbar .nav-link:hover,
.app-navbar .nav-link:focus,
.app-navbar .navbar-brand:hover {
    color: #fff;
    text-decoration: none;
}

.app-navbar .nav-link.active {
    color: #fff;
    font-weight: 600;
}

.app-navbar .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.35);
}

.app-navbar .navbar-toggler-icon {
    filter: invert(1) grayscale(1) brightness(2);
}

.app-footer {
    border-top: 1px solid var(--line);
    background: var(--surface);
    padding: 1.25rem 0;
    margin-top: 3rem;
}

/* ---------- Page furniture ---------- */

.hero {
    background: linear-gradient(180deg, #ffffff 0%, var(--canvas) 100%);
    border-bottom: 1px solid var(--line);
    padding: 3.25rem 0 2.5rem;
}

.hero-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    color: var(--ink-muted);
    font-size: 1.075rem;
    max-width: 46rem;
    margin-bottom: 0;
}

.page-body {
    padding-top: 2rem;
}

.page-header {
    margin-bottom: 1.75rem;
}

.page-title {
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.35rem;
}

.page-subtitle {
    color: var(--ink-muted);
    max-width: 46rem;
    margin-bottom: 0;
}

.breadcrumb {
    --bs-breadcrumb-divider: '/';
}

/* ---------- Tool catalog ---------- */

.tool-group + .tool-group {
    margin-top: 2.5rem;
}

.tool-group-header {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    margin-bottom: 1rem;
}

.tool-group-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 12px;
    background: var(--brand-soft);
    color: var(--brand);
}

.tool-group-title {
    font-size: 1.25rem;
    font-weight: 650;
    margin-bottom: 0.15rem;
}

.tool-group-desc {
    color: var(--ink-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.tool-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.tool-card {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 1.05rem 1.1rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    color: inherit;
    transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}

.tool-card:hover {
    border-color: var(--brand);
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.12);
    transform: translateY(-1px);
    text-decoration: none;
    color: inherit;
}

.tool-card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.6rem;
    height: 2.6rem;
    flex: 0 0 auto;
    border-radius: 12px;
    background: var(--brand-soft);
    color: var(--brand);
}

.tool-card-body {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

.tool-card-title {
    font-weight: 600;
}

.tool-card-desc {
    color: var(--ink-muted);
    font-size: 0.875rem;
}

.tool-card-go {
    margin-left: auto;
    color: var(--ink-muted);
}

.tool-card:hover .tool-card-go {
    color: var(--brand);
}

/* ---------- Tool page ---------- */

.tool-app {
    max-width: 56rem;
}

.tool-panel {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 1px 2px rgba(17, 24, 39, 0.04);
}

.tool-panel .card-body {
    padding: 1.35rem;
}

.tool-output {
    margin-top: 2rem;
}

.tool-notes {
    margin-top: 2.5rem;
    padding: 1.1rem 1.25rem;
    background: var(--brand-soft);
    border-radius: var(--radius);
}

.tool-notes ul {
    margin-bottom: 0;
    padding-left: 1.1rem;
    color: #3f3f6b;
    font-size: 0.9rem;
}

.tool-notes li + li {
    margin-top: 0.35rem;
}

/* ---------- Direct link generator results ---------- */

.dlg-results {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.dlg-item {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.85rem 1rem 0.9rem;
}

.dlg-item-invalid {
    border-color: #f1b0b7;
    background: #fff7f7;
}

.dlg-item-label {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.4rem;
}

.dlg-link-input {
    background: #fbfbfe;
}

.dlg-item-source {
    margin-top: 0.4rem;
    font-size: 0.78rem;
    color: var(--ink-muted);
    overflow-wrap: anywhere;
}

.dlg-item-warning {
    margin-top: 0.45rem;
    font-size: 0.82rem;
    color: #92400e;
}

.dlg-item-error {
    margin-top: 0.45rem;
    font-size: 0.85rem;
    color: #b02a37;
}

/* ---------- Toasts ---------- */

.toast-stack {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: 1080;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.fbc-toast {
    min-width: 12rem;
    max-width: 22rem;
    padding: 0.6rem 0.9rem;
    border-radius: 10px;
    color: #fff;
    font-size: 0.9rem;
    box-shadow: 0 10px 30px rgba(17, 24, 39, 0.22);
    animation: fbc-toast-in .18s ease-out;
}

.fbc-toast-leaving {
    opacity: 0;
    transform: translateY(6px);
    transition: opacity .25s ease, transform .25s ease;
}

.fbc-toast-success { background: #16794c; }
.fbc-toast-danger { background: #b02a37; }
.fbc-toast-warning { background: #9a6700; }
.fbc-toast-info { background: #1f6feb; }

@keyframes fbc-toast-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- Blazor error UI ---------- */

#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1090;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}