:root {
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-900: #1e3a8a;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-900: #0f172a;
    --ok: #059669;
    --warn: #d97706;
    --danger: #dc2626;
    --radius: 16px;
    --shadow: 0 10px 30px rgba(37, 99, 235, 0.08);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: "Source Sans 3", "Segoe UI", sans-serif;
    color: var(--slate-900);
    background: #f8fbff;
}

h1, h2, h3, .brand-name, .topbar-title {
    font-family: "Outfit", sans-serif;
}

a {
    color: var(--blue-600);
    text-decoration: none;
}

a:hover {
    text-decoration: none;
}

/* Header navigation — button tabs, not classic links */
.nav-menu {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem;
    border-radius: 18px;
    background: #eef4ff;
    border: 1px solid #d7e6ff;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
}

.nav-menu a.nav-tab,
.nav-menu a.nav-tab:link,
.nav-menu a.nav-tab:visited,
.nav-menu a.nav-tab:hover,
.nav-menu a.nav-tab:active,
.nav-menu a.nav-tab:focus {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.85rem 0.4rem 0.4rem;
    border-radius: 13px;
    color: #475569 !important;
    background: #ffffff;
    border: 1px solid #dbe7f8;
    text-decoration: none !important;
    box-shadow: 0 1px 2px rgba(37, 99, 235, 0.04);
    font-family: "Outfit", sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.01em;
    white-space: nowrap;
    outline: none;
    cursor: pointer;
    transition: background 0.16s ease, color 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
}

.nav-menu a.nav-tab:hover {
    color: #1e40af !important;
    background: #f8fbff;
    border-color: #93c5fd;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

.nav-menu a.nav-tab.active,
.nav-menu a.nav-tab.active:link,
.nav-menu a.nav-tab.active:visited,
.nav-menu a.nav-tab.active:hover {
    color: #ffffff !important;
    background: linear-gradient(135deg, #1d4ed8, #3b82f6);
    border-color: transparent;
    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.28);
}

.nav-tab-icon {
    width: 1.85rem;
    height: 1.85rem;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid rgba(191, 219, 254, 0.9);
    flex-shrink: 0;
}

.nav-tab-icon svg {
    width: 0.95rem;
    height: 0.95rem;
    fill: currentColor;
}

.nav-menu a.nav-tab.active .nav-tab-icon {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.28);
    color: #fff;
}

.nav-tab-label {
    padding-right: 0.2rem;
}

@media (max-width: 900px) {
    .nav-menu {
        width: 100%;
        overflow-x: auto;
        scrollbar-width: none;
    }

    .nav-menu::-webkit-scrollbar {
        display: none;
    }
}

@media (max-width: 640px) {
    .nav-tab-label {
        display: none;
    }

    .nav-menu a.nav-tab,
    .nav-menu a.nav-tab:link,
    .nav-menu a.nav-tab:visited,
    .nav-menu a.nav-tab:hover,
    .nav-menu a.nav-tab:active {
        padding: 0.35rem;
    }
}

.page-header {
    margin-bottom: 1.5rem;
}

.page-header h1 {
    margin: 0 0 0.35rem;
    font-size: 1.85rem;
    font-weight: 700;
    color: var(--blue-900);
}

.page-header p {
    margin: 0;
    color: var(--slate-500);
}

.muted {
    color: var(--slate-500);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.summary-card {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(191, 219, 254, 0.8);
    border-radius: var(--radius);
    padding: 1.1rem 1.2rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.summary-card span {
    color: var(--slate-500);
    font-size: 0.9rem;
}

.summary-card strong {
    font-family: "Outfit", sans-serif;
    font-size: 1.8rem;
    color: var(--blue-700);
}

.summary-card small {
    color: var(--slate-600);
}

.summary-card.warn strong { color: var(--warn); }
.summary-card.ok strong { color: var(--ok); }
.summary-card.danger strong { color: var(--danger); }

.section-block {
    margin-top: 0.5rem;
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.85rem;
}

.section-head h2 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--blue-900);
}

.link-soft {
    text-decoration: none;
    font-weight: 600;
    color: var(--blue-600);
}

.form-panel,
.table-panel,
.login-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(191, 219, 254, 0.85);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.form-panel {
    padding: 1.4rem;
    max-width: 760px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

label {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: var(--slate-600);
    font-weight: 600;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
.form-input {
    border: 1px solid var(--blue-200);
    border-radius: 12px;
    padding: 0.7rem 0.85rem;
    font: inherit;
    font-size: 1rem;
    line-height: 1.4;
    color: var(--slate-900);
    background: #fff;
    outline: none;
    width: 100%;
    box-sizing: border-box;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    -webkit-appearance: none;
    appearance: none;
}

input:focus,
.form-input:focus {
    border-color: var(--blue-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

input[readonly],
.form-input[readonly] {
    background: #fff;
    color: var(--slate-900);
    cursor: default;
    opacity: 1;
}

input[readonly]:focus,
.form-input[readonly]:focus {
    border-color: var(--blue-200);
    box-shadow: none;
}

.form-actions {
    margin-top: 1.25rem;
}

.btn-primary,
.btn-soft,
.btn-ghost {
    border: none;
    border-radius: 12px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue-600), #60a5fa);
    color: white;
    padding: 0.75rem 1.2rem;
    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.22);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: default;
}

.btn-soft {
    background: var(--blue-50);
    color: var(--blue-700);
    padding: 0.45rem 0.8rem;
    border: 1px solid var(--blue-200);
}

.btn-ghost {
    background: transparent;
    color: var(--slate-600);
    padding: 0.4rem 0.7rem;
}

.btn-ghost:hover {
    color: var(--blue-700);
}

.toggle-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.toggle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 14px;
    background: var(--blue-50);
    border: 1px solid var(--blue-100);
    flex-direction: row;
}

.toggle-row strong {
    display: block;
    color: var(--slate-900);
}

.toggle-row span {
    display: block;
    font-weight: 400;
    color: var(--slate-500);
    font-size: 0.88rem;
    margin-top: 0.2rem;
}

.toggle-row input[type="checkbox"] {
    width: 1.2rem;
    height: 1.2rem;
    accent-color: var(--blue-600);
}

.toggle-row.is-readonly {
    opacity: 0.92;
    cursor: default;
}

.readonly-field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.readonly-label {
    font-size: 0.9rem;
    color: var(--slate-600);
    font-weight: 600;
}

.readonly-control {
    position: relative;
}

.readonly-control .form-input {
    padding-right: 2.6rem;
}

.lock-badge {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.15rem;
    height: 1.15rem;
    color: #64748b;
    display: grid;
    place-items: center;
    pointer-events: none;
}

.lock-badge svg,
.lock-inline svg {
    width: 1.05rem;
    height: 1.05rem;
    fill: currentColor;
}

.lock-inline {
    display: inline-flex;
    vertical-align: -0.15rem;
    margin-right: 0.35rem;
    color: #64748b;
}

.password-panel {
    margin-top: 1.25rem;
}

.password-panel h2,
.admin-create h2,
.admin-user-card h3,
.profile-subjects h3 {
    margin: 0 0 1rem;
    font-family: "Outfit", sans-serif;
    color: var(--blue-900);
}

.admin-create {
    margin-bottom: 1.25rem;
}

.admin-sync {
    margin-bottom: 1.25rem;
}

.admin-sync .muted {
    margin: 0 0 0.75rem;
}

.admin-user-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.admin-user-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 0.85rem;
}

.admin-user-head h3 {
    margin-bottom: 0.2rem;
}

.admin-app-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: flex-end;
}

.admin-section-title {
    margin: 1rem 0 0.55rem;
    font-family: "Outfit", sans-serif;
    font-size: 0.95rem;
    color: var(--blue-900);
}

.paired-subjects {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    margin-bottom: 0.85rem;
}

.subject-chip {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 0.85rem;
    border-radius: 12px;
    background: var(--blue-50);
    border: 1px solid var(--blue-100);
}

.subject-chip strong {
    display: block;
    color: var(--slate-900);
}

.subject-chip span {
    display: block;
    font-size: 0.82rem;
    color: var(--slate-500);
}

.pair-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.75rem;
    align-items: end;
}

select.form-input {
    border: 1px solid var(--blue-200);
    border-radius: 12px;
    padding: 0.7rem 0.85rem;
    font: inherit;
    background: #fff;
    color: var(--slate-900);
    width: 100%;
}

@media (max-width: 700px) {
    .pair-row {
        grid-template-columns: 1fr;
    }
}

.alert-ok,
.alert-error {
    margin-top: 1rem;
    border-radius: 12px;
    padding: 0.75rem 0.9rem;
    font-size: 0.92rem;
}

.alert-ok {
    background: #ecfdf5;
    color: #047857;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
    margin-bottom: 1rem;
}

.table-panel {
    overflow: auto;
    padding: 0.35rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 0.9rem 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(191, 219, 254, 0.7);
    vertical-align: middle;
}

.data-table th {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--slate-500);
    font-weight: 600;
}

.cell-main {
    font-weight: 600;
}

.cell-sub {
    font-size: 0.82rem;
    color: var(--slate-500);
}

.money {
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    white-space: nowrap;
}

.empty-state {
    padding: 1.25rem;
    color: var(--slate-500);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

.app-grid.compact {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.app-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(191, 219, 254, 0.85);
    border-radius: var(--radius);
    padding: 1.15rem;
    box-shadow: var(--shadow);
}

.app-card-top {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    align-items: flex-start;
}

.app-card h3 {
    margin: 0;
    font-size: 1.05rem;
    color: var(--blue-900);
}

.app-domain {
    margin: 0.65rem 0 0.85rem;
    color: var(--slate-600);
    word-break: break-all;
}

.app-meta {
    display: flex;
    gap: 0.5rem;
}

.type-chip,
.status-pill {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.25rem 0.65rem;
}

.type-chip {
    background: var(--blue-50);
    color: var(--blue-700);
    border: 1px solid var(--blue-100);
}

.status-pill.online {
    background: #ecfdf5;
    color: #047857;
}

.status-pill.active {
    background: #eff6ff;
    color: #1d4ed8;
}

.status-pill.legacy {
    background: #f1f5f9;
    color: #475569;
}

.status-pill.offline {
    background: #fff7ed;
    color: #c2410c;
}

.status-pill.blocked {
    background: #fef2f2;
    color: #b91c1c;
}

.login-card {
    padding: 1.75rem;
}

.login-brand {
    display: flex;
    gap: 0.9rem;
    align-items: center;
    margin-bottom: 1.4rem;
}

.login-brand h1 {
    margin: 0;
    font-size: 1.45rem;
    color: var(--blue-900);
}

.login-brand p {
    margin: 0.15rem 0 0;
    color: var(--slate-500);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 0.95rem;
}

.login-form .btn-primary {
    width: 100%;
    margin-top: 0.35rem;
}

.login-hint {
    margin: 1.1rem 0 0;
    text-align: center;
    color: var(--slate-500);
    font-size: 0.88rem;
}

#blazor-error-ui {
    background: #fff;
    bottom: 0;
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.1);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

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

.loading.blazor-error-boundary,
.error.blazor-error-boundary {
    display: none;
}

@media (max-width: 1100px) {
    .summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 700px) {
    .summary-grid,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .content {
        padding: 1.1rem !important;
    }
}

.admin-detail-row td {
    background: #f8fbff;
    padding: 0;
}

.admin-detail-panel {
    padding: 1rem 1.25rem 1.25rem;
}

.admin-inline-table .table-input {
    min-width: 8rem;
    padding: 0.45rem 0.6rem;
    font-size: 0.92rem;
}

.admin-actions-cell {
    white-space: nowrap;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.notif-prefs-table {
    margin-top: 1rem;
}

.notif-prefs-table .data-table td:first-child {
    font-weight: 600;
}

.notif-prefs-table input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    cursor: pointer;
}

.row-expanded td {
    background: rgba(239, 246, 255, 0.65);
}