:root {
    color-scheme: dark;
    --bg: #101419;
    --surface: #181f26;
    --surface-muted: #121920;
    --text: #f4f7fa;
    --muted: #9eaebb;
    --border: #2b3844;
    --primary: #55a9f4;
    --primary-hover: #78bfff;
    --danger: #ff7c7c;
    --danger-bg: #2a171a;
    --success: #3fbf9b;
    --success-bg: #142923;
    --warning: #f0b35b;
    --admin: #a67cff;
    --radius: 8px;
    font-family: "Segoe UI", Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background:
        linear-gradient(135deg, rgba(85, 169, 244, 0.16), transparent 34%),
        linear-gradient(225deg, rgba(166, 124, 255, 0.14), transparent 38%),
        var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.45;
}

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

a:hover {
    text-decoration: underline;
}

h1, h2, p {
    margin-top: 0;
}

h1 {
    margin-bottom: 0;
    font-size: 28px;
    line-height: 1.2;
}

h2 {
    margin-bottom: 4px;
    font-size: 18px;
}

button, input, textarea, select {
    font: inherit;
}

input, textarea, select {
    width: 100%;
    min-height: 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-muted);
    color: var(--text);
    padding: 8px 10px;
}

textarea {
    resize: vertical;
}

input:focus, textarea:focus, select:focus {
    border-color: var(--primary);
    outline: 2px solid rgba(23, 105, 170, 0.15);
}

label {
    display: grid;
    gap: 6px;
    color: var(--muted);
    font-weight: 600;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    min-height: 58px;
    display: flex;
    align-items: center;
    gap: 24px;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--surface) 96%, transparent);
    padding: 0 28px;
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.16);
}

.brand, .auth-brand {
    color: var(--text);
    font-weight: 800;
    letter-spacing: 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.brand:hover {
    text-decoration: none;
}

.topnav {
    align-items: center;
    display: flex;
    gap: 16px;
}

.topnav a {
    color: var(--muted);
}

.topnav a:hover,
.topnav a:focus-visible {
    color: var(--text);
    outline: none;
}

.gateway-button {
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0 12px;
    background: var(--surface-muted);
    color: var(--text) !important;
    font-weight: 700;
    transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.gateway-button:hover,
.gateway-button:focus-visible {
    transform: translateY(-2px);
    border-color: var(--primary);
    background: #17222b;
    text-decoration: none;
}

.account {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
}

.account form {
    margin: 0;
}

.page {
    width: min(1420px, calc(100% - 40px));
    margin: 0 auto;
    padding: 32px 0 64px;
}

.page-heading, .section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
}

.page-heading {
    margin-bottom: 26px;
}

.section-heading {
    margin-bottom: 18px;
}

.section-heading p {
    margin-bottom: 0;
    color: var(--muted);
}

.eyebrow {
    margin-bottom: 5px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.muted, .field-note, .auth-note, .subline {
    color: var(--muted);
}

.subline {
    display: block;
    margin-top: 3px;
    font-size: 12px;
}

.back-link {
    display: inline-block;
    margin-bottom: 10px;
}

.section {
    margin-top: 26px;
    border-top: 1px solid var(--border);
    padding-top: 24px;
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0 0 18px;
}

.subtabs {
    margin-top: -8px;
}

.tab {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-muted);
    color: var(--text);
    padding: 8px 12px;
    font-weight: 700;
}

.tab:hover,
.tab:focus-visible {
    border-color: var(--primary);
    text-decoration: none;
}

.tab-active {
    border-color: var(--primary);
    background: var(--primary);
    color: #071017;
}

.split {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 48px;
}

.metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.metric {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    padding: 17px 18px;
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.14);
}

.metric span {
    display: block;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.metric strong {
    display: block;
    margin-top: 4px;
    font-size: 26px;
}

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

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

th, td {
    border-bottom: 1px solid var(--border);
    padding: 11px 13px;
    text-align: left;
    vertical-align: middle;
}

th {
    background: var(--surface-muted);
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
}

tr:last-child td {
    border-bottom: 0;
}

.cell-action {
    width: 1%;
    white-space: nowrap;
    text-align: right;
}

.cell-action form {
    display: inline;
}

.empty {
    color: var(--muted);
    text-align: center;
    padding: 24px;
}

.stack {
    display: grid;
    gap: 14px;
}

.inline-form, .copy-row {
    display: flex;
    align-items: stretch;
    gap: 8px;
}

.compact-form {
    min-width: 280px;
}

.compact-form select {
    min-width: 160px;
}

.log-filter {
    align-items: flex-end;
}

.log-filter label {
    min-width: 180px;
    margin: 0;
}

.logs-table td:first-child {
    width: 190px;
    white-space: nowrap;
}

.logs-table td:nth-child(2) {
    width: 230px;
    font-weight: 700;
}

.settings-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 18px 24px;
    max-width: 960px;
}

.quiz-list {
    display: grid;
    gap: 14px;
}

.quiz-question {
    display: grid;
    gap: 12px;
    margin: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    padding: 14px;
}

.quiz-question[hidden] {
    display: none;
}

.quiz-question legend {
    padding: 0 6px;
    color: var(--text);
    font-weight: 800;
}

.span-two {
    grid-column: span 2;
}

.toggle-row {
    display: flex;
    align-items: center;
    gap: 9px;
}

.toggle-row input {
    width: 18px;
    min-height: 18px;
}

.actions {
    display: flex;
    justify-content: flex-start;
}

.button {
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: var(--radius);
    padding: 7px 12px;
    cursor: pointer;
    font-weight: 700;
    white-space: nowrap;
    transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    background: #17222b;
    text-decoration: none;
}

.button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.button-primary {
    background: var(--primary);
    color: #071017;
}

.button-primary:hover {
    border-color: var(--primary-hover);
    background: #17222b;
    color: var(--text);
}

.button-secondary {
    border-color: var(--border);
    background: var(--surface-muted);
    color: var(--text);
}

.button-quiet {
    border-color: var(--border);
    background: var(--surface-muted);
    color: var(--text);
}

.button-danger {
    border-color: #5e2f32;
    background: var(--danger-bg);
    color: var(--danger);
}

.badge {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 3px 7px;
    font-size: 11px;
    font-weight: 800;
    white-space: nowrap;
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-muted {
    background: #22303a;
    color: var(--muted);
}

.badge-admin {
    background: #261f34;
    color: var(--admin);
}

.alert {
    margin-bottom: 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 14px;
}

.alert-error {
    border-color: #5e2f32;
    background: var(--danger-bg);
    color: var(--danger);
}

.alert-success {
    border-color: #28614f;
    background: var(--success-bg);
    color: var(--success);
}

.invite-result {
    display: grid;
    gap: 10px;
}

.filter-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0;
}

.personal-filter-list {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.personal-filter-group {
    border-top: 1px solid var(--border);
    padding-top: 14px;
}

.personal-filter-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.filter-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    padding: 5px 7px 5px 10px;
}

.filter-item button {
    width: 24px;
    height: 24px;
    border: 0;
    background: transparent;
    color: var(--danger);
    cursor: pointer;
    font-size: 20px;
    line-height: 1;
}

.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    background:
        linear-gradient(135deg, rgba(85, 169, 244, 0.16), transparent 34%),
        linear-gradient(225deg, rgba(166, 124, 255, 0.14), transparent 38%),
        var(--bg);
}

.auth-panel {
    width: min(100%, 400px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    padding: 28px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.auth-panel-wide {
    width: min(100%, 480px);
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
}

.auth-panel h1 {
    margin-bottom: 22px;
}

.auth-note, .auth-link {
    display: block;
    margin: 18px 0 0;
    font-size: 13px;
}

.auth-links {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 18px;
}

.auth-gateway {
    width: 100%;
    margin-top: 14px;
}

.registration-target {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 5px 12px;
    margin-bottom: 18px;
    border: 1px solid var(--border);
    background: var(--surface-muted);
    padding: 12px;
}

.registration-target span {
    color: var(--muted);
}

code {
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.mark {
    width: 56px;
    height: 56px;
    display: grid;
    place-items: center;
    border-radius: var(--radius);
    background: #22303a;
    color: var(--primary);
    flex: 0 0 auto;
}

.mark.compact {
    width: 38px;
    height: 38px;
}

svg {
    width: 28px;
    height: 28px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.mark.compact svg {
    width: 22px;
    height: 22px;
}

@media (max-width: 900px) {
    .topbar {
        align-items: flex-start;
        flex-wrap: wrap;
        gap: 8px 16px;
        padding: 12px 16px;
    }

    .account {
        width: 100%;
        margin-left: 0;
    }

    .page {
        width: min(100% - 24px, 1420px);
        padding-top: 24px;
    }

    .split, .metrics, .settings-grid {
        grid-template-columns: 1fr;
    }

    .span-two {
        grid-column: span 1;
    }

    .page-heading, .section-heading {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 560px) {
    h1 {
        font-size: 24px;
    }

    .inline-form, .copy-row {
        flex-direction: column;
    }

    .account {
        align-items: flex-start;
        flex-direction: column;
    }
}