:root {
    --bg: #f5f7fb;
    --panel: #ffffff;
    --panel-soft: #eef3fb;
    --text: #1f2937;
    --muted: #667085;
    --line: #d7dfec;
    --primary: #1f6feb;
    --primary-dark: #184fb1;
    --success: #1d8f5c;
    --danger: #c83b3b;
    --shadow: 0 18px 40px rgba(20, 36, 73, 0.08);
    --radius: 18px;
    --radius-small: 12px;
    --font: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    color: var(--text);
    background:
        radial-gradient(circle at top right, rgba(31, 111, 235, 0.12), transparent 26%),
        linear-gradient(180deg, #fbfcff 0%, var(--bg) 100%);
}

a {
    color: inherit;
    text-decoration: none;
}

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

.site-shell {
    width: min(1120px, calc(100% - 2rem));
    margin: 0 auto;
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}

body.statistics-page .site-shell {
    width: min(1500px, calc(100% - 2rem));
}

.site-header,
.site-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem 0;
}

.site-footer {
    color: var(--muted);
    font-size: 0.95rem;
    border-top: 1px solid var(--line);
    margin-top: auto;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.footer-links a:hover,
.footer-links a:focus-visible {
    color: var(--primary);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 2.15rem;
    letter-spacing: 0.01em;
}

.brand-logo {
    width: 6.2rem;
    height: 6.2rem;
    flex: 0 0 auto;
    display: block;
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.site-nav a {
    padding: 0.6rem 0.9rem;
    border-radius: 999px;
    color: var(--muted);
}

.site-nav a:hover,
.site-nav a:focus-visible {
    background: rgba(31, 111, 235, 0.08);
    color: var(--primary);
}

.page-content {
    padding-bottom: 2rem;
}

.hero,
.two-column,
.stats-grid,
.training-layout,
.page-head,
.auth-card,
.form-panel,
.card-panel {
    margin-bottom: 1.5rem;
}

.hero {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1.5fr 1fr;
    align-items: stretch;
    padding: 2rem 0 1rem;
}

.hero-copy,
.hero-panel,
.auth-card,
.card-panel,
.form-panel,
.stat-card {
    background: var(--panel);
    border: 1px solid rgba(215, 223, 236, 0.9);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-copy,
.hero-panel,
.auth-card,
.card-panel,
.form-panel {
    padding: 1.5rem;
}

.compact-panel {
    padding: 0.9rem 1rem;
}

.eyebrow,
.card-label,
.stat-label {
    display: inline-block;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.78rem;
    color: var(--primary);
    font-weight: 700;
}

.hero h1,
.page-head h1,
.auth-card h1,
.card-panel h2,
.form-panel h1 {
    margin: 0.5rem 0 0.75rem;
}

.hero p,
.page-head p,
.muted,
.list-card p,
.empty-state p {
    color: var(--muted);
}

.hero-actions,
.head-actions,
.list-actions,
.training-actions,
.status-row,
.section-heading,
.page-head,
.inline-form {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.page-head,
.section-heading {
    justify-content: space-between;
}

.section-heading > * {
    min-width: 0;
}

.page-head-copy {
    min-width: 0;
}

.page-head-copy-narrow {
    max-width: 42rem;
}

.feature-list,
.list-stack,
.mode-selector,
.completion-actions {
    display: grid;
    gap: 0.75rem;
    padding: 0;
    margin: 0;
    list-style: none;
}

.mode-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.mode-heading h2 {
    margin: 0;
}

.mode-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    align-items: center;
}

.completion-actions {
    grid-template-columns: repeat(auto-fit, minmax(160px, max-content));
    align-items: center;
}

.mode-selector .button {
    padding: 0.55rem 0.9rem;
}

.is-hidden {
    display: none !important;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0.8rem 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
}

.button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
}

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

.button-primary:hover,
.button-primary:focus-visible {
    background: var(--primary-dark);
}

.button-secondary {
    background: var(--panel-soft);
    border-color: var(--line);
    color: var(--text);
}

.button-success {
    background: var(--success);
    color: #fff;
}

.button-danger {
    background: var(--danger);
    color: #fff;
}

.button-small {
    padding: 0.55rem 0.85rem;
    font-size: 0.92rem;
}

.button-large {
    min-width: 180px;
    padding: 1rem 1.2rem;
    font-size: 1rem;
}

.button-block {
    width: 100%;
}

.overview-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: minmax(0, 1.7fr) minmax(300px, 0.9fr);
}

.overview-main-panel {
    min-width: 0;
}

.overview-side {
    display: grid;
    gap: 1rem;
    align-content: start;
}

.overview-lower-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.4fr);
}

.admin-dashboard-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.admin-dashboard-card {
    display: grid;
    align-content: start;
    gap: 0.85rem;
}

.public-library-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.public-library-card {
    display: grid;
    gap: 1rem;
    min-width: 0;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: linear-gradient(180deg, #ffffff 0%, #eef4ff 100%);
}

@media (max-width: 900px) {
    .public-library-grid {
        grid-template-columns: repeat(2, minmax(240px, 1fr));
    }
}

@media (max-width: 560px) {
    .public-library-grid {
        grid-template-columns: 1fr;
    }
}

.public-library-card h3 {
    margin: 0 0 0.35rem;
}

.public-library-card-body {
    display: grid;
    gap: 0.6rem;
}

.public-library-card-head {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 0.75rem;
}

.public-library-actions {
    display: grid;
    align-content: end;
}

.library-preview-modal {
    width: min(760px, calc(100vw - 2rem));
    border: 0;
    padding: 0;
    background: transparent;
}

.library-preview-trigger {
    background: rgba(31, 111, 235, 0.14);
    border-color: rgba(31, 111, 235, 0.3);
    color: var(--primary-dark);
}

.library-preview-trigger:hover,
.library-preview-trigger:focus-visible {
    background: rgba(31, 111, 235, 0.2);
    border-color: rgba(31, 111, 235, 0.38);
}

.library-preview-modal::backdrop {
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(3px);
}

.library-preview-modal-card {
    display: grid;
    gap: 1rem;
    padding: 1.25rem;
    border: 1px solid rgba(215, 223, 236, 0.9);
    border-radius: var(--radius);
    background: linear-gradient(180deg, #ffffff 0%, #eef4ff 100%);
    box-shadow: 0 26px 70px rgba(20, 36, 73, 0.22);
}

.library-preview-head {
    align-items: center;
    gap: 1rem;
}

.library-preview-import {
    display: flex;
    justify-content: center;
    flex: 0 0 auto;
}

.library-preview-list {
    display: grid;
    gap: 0.7rem;
    max-height: min(65vh, 560px);
    overflow-y: auto;
    padding-right: 0.2rem;
}

.library-preview-item {
    display: grid;
    gap: 0.2rem;
    padding: 0.9rem 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: rgba(255, 255, 255, 0.82);
}

.library-preview-item strong {
    margin: 0;
}

.library-preview-item span {
    color: var(--muted);
    line-height: 1.45;
}

.import-help-text {
    line-height: 1.6;
}

.overview-stats-panel h2,
.overview-focus-panel h2 {
    margin-top: 0;
}

.embedded-section {
    display: grid;
    gap: 0.85rem;
}

.embedded-section + .embedded-section {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--line);
}

.focus-grid-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
}

.focus-grid-cards-single {
    grid-template-columns: 1fr;
}

.list-search-bar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.65rem;
    min-width: 0;
}

.list-search-field {
    display: block;
    min-width: 0;
}

.list-search-field input {
    width: min(280px, 100%);
}

.list-search-toggle {
    display: none;
}

.focus-card {
    display: grid;
    gap: 0.3rem;
    padding: 1rem 1.05rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: linear-gradient(180deg, #f6f9ff 0%, #eef3fb 100%);
}

.focus-card strong {
    font-size: 1rem;
    line-height: 1.25;
}

.focus-card span {
    color: var(--muted);
    font-size: 0.93rem;
    line-height: 1.4;
}

.focus-card:hover,
.focus-card:focus-visible {
    border-color: rgba(31, 111, 235, 0.35);
    background: linear-gradient(180deg, #f3f8ff 0%, #e8f0ff 100%);
}

.embedded-section h2 {
    margin: 0;
}

.stats-compact-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
}

.stats-column-headings {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
    margin-bottom: 0.75rem;
}

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

.author-stats-head,
.author-stats-panel {
    width: 100%;
}

.author-stats-summary .stat-card {
    padding: 1.2rem 1.25rem;
}

.author-stats-summary .stat-card strong {
    display: block;
    margin: 0.35rem 0 0.45rem;
    font-size: 1.8rem;
    line-height: 1.1;
}

.author-stats-summary .stat-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.35;
}

.author-stats-intro {
    margin: -0.15rem 0 1rem;
}

.author-stats-table td strong {
    display: block;
    margin-bottom: 0.2rem;
}

.author-stats-table-wrap {
    overflow-x: visible;
}

.author-stats-table {
    table-layout: fixed;
}

.author-stats-table th:nth-child(1) {
    width: 26%;
}

.author-stats-table th:nth-child(2) {
    width: 22%;
}

.author-stats-table th:nth-child(3),
.author-stats-table th:nth-child(4),
.author-stats-table th:nth-child(5) {
    width: 17.33%;
}

.author-stats-cell-primary strong {
    font-size: 1rem;
}

.author-stats-table td .muted {
    font-size: 0.92rem;
    line-height: 1.4;
}

.stat-compact-item {
    padding: 0.85rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: var(--panel-soft);
    display: grid;
    gap: 0.3rem;
}

.stat-compact-item strong {
    font-size: 1.45rem;
    line-height: 1.1;
}

.stat-compact-item-known {
    border-color: rgba(29, 143, 92, 0.24);
    background: rgba(29, 143, 92, 0.08);
}

.stat-compact-item-known .stat-label,
.stat-compact-item-known strong {
    color: var(--success);
}

.stat-compact-item-unknown {
    border-color: rgba(200, 59, 59, 0.24);
    background: rgba(200, 59, 59, 0.08);
}

.stat-compact-item-unknown .stat-label,
.stat-compact-item-unknown strong {
    color: var(--danger);
}

.overview-focus-panel {
    max-width: 100%;
}

.stack-column {
    display: grid;
    gap: 1.5rem;
}

.edit-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.share-code-box {
    display: grid;
    gap: 0.45rem;
    padding: 1rem 1.1rem;
    margin-bottom: 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: var(--panel-soft);
}

.share-code-box strong {
    font-size: 2rem;
    letter-spacing: 0.18em;
    line-height: 1.1;
}

.activity-list {
    display: grid;
    gap: 0.6rem;
}

.activity-item {
    display: block;
    position: relative;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: rgba(255, 255, 255, 0.65);
}

.activity-main {
    display: grid;
    gap: 0.22rem;
    min-width: 0;
    width: 100%;
    padding-right: 7rem;
}

.activity-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.28rem 0.6rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.82rem;
    position: absolute;
    top: 0.75rem;
    right: 0.9rem;
}

.activity-badge-known {
    background: rgba(29, 143, 92, 0.12);
    color: var(--success);
}

.activity-badge-unknown {
    background: rgba(200, 59, 59, 0.12);
    color: var(--danger);
}

.activity-panel .section-heading {
    margin-bottom: 0.35rem;
}

.subtle-panel {
    box-shadow: none;
    background: rgba(255, 255, 255, 0.72);
}

.account-details {
    display: grid;
    gap: 0.85rem;
}

.account-detail-item {
    display: grid;
    gap: 0.3rem;
    padding: 1rem 1.05rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: var(--panel-soft);
}

.account-detail-item span {
    color: var(--muted);
    font-size: 0.9rem;
}

.account-detail-item strong {
    font-size: 1.05rem;
    line-height: 1.35;
}

.stack-form {
    display: grid;
    gap: 1rem;
}

.stack-form label {
    display: grid;
    gap: 0.4rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
select,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: #fff;
    padding: 0.85rem 1rem;
    color: var(--text);
}

textarea {
    resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
    outline: 2px solid rgba(31, 111, 235, 0.18);
    border-color: var(--primary);
}

select {
    appearance: none;
}

.flash {
    margin-bottom: 1rem;
    padding: 1rem 1.2rem;
    border-radius: var(--radius-small);
    border: 1px solid transparent;
}

.flash-success {
    background: rgba(29, 143, 92, 0.12);
    border-color: rgba(29, 143, 92, 0.24);
}

.flash-error {
    background: rgba(200, 59, 59, 0.12);
    border-color: rgba(200, 59, 59, 0.24);
}

.error-text {
    color: var(--danger);
}

.table-wrap {
    overflow-x: auto;
}

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

th,
td {
    padding: 0.95rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

th {
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
}

.actions-cell {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.empty-state {
    border: 1px dashed var(--line);
    border-radius: var(--radius-small);
    padding: 1.2rem;
    text-align: center;
    background: rgba(255, 255, 255, 0.65);
}

.helper-box,
.error-list {
    border-radius: var(--radius-small);
    padding: 1rem 1.1rem;
}

.helper-box {
    border: 1px solid var(--line);
    background: var(--panel-soft);
    color: var(--muted);
}

.legal-content {
    line-height: 1.65;
}

.legal-list {
    margin: 0;
    padding-left: 1.2rem;
}

.error-list {
    border: 1px solid rgba(200, 59, 59, 0.24);
    background: rgba(200, 59, 59, 0.08);
    display: grid;
    gap: 0.35rem;
}

.list-card,
.list-accordion-card {
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: linear-gradient(180deg, #fdfefe 0%, #eef3fb 100%);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.list-card:hover,
.list-card:focus-within,
.list-accordion-card:hover,
.list-accordion-card:focus-within,
.list-accordion-card.is-open {
    transform: translateY(-2px);
    border-color: rgba(31, 111, 235, 0.22);
    box-shadow: 0 14px 28px rgba(20, 36, 73, 0.09);
}

.list-card {
    padding: 1rem 1.05rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.list-card h3 {
    margin: 0;
}

.list-accordion-card h3 {
    margin: 0;
    font-size: 1.02rem;
    line-height: 1.25;
}

.list-accordion-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.72rem 0.9rem;
}

.list-accordion-main {
    min-width: 0;
    flex: 1 1 auto;
}

.list-accordion-main h3 {
    min-width: 0;
    overflow-wrap: anywhere;
}

.list-row-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.5rem;
    flex: 0 0 auto;
}

.list-accordion-toggle {
    flex: 0 0 auto;
    padding: 0.48rem 0.78rem;
    background: rgba(31, 111, 235, 0.14);
    border-color: rgba(31, 111, 235, 0.24);
    color: var(--primary-dark);
}

.list-accordion-toggle:hover,
.list-accordion-toggle:focus-visible {
    transform: none;
    filter: none;
    background: rgba(31, 111, 235, 0.2);
    border-color: rgba(31, 111, 235, 0.32);
}

.list-train-button {
    flex: 0 0 auto;
    min-width: 152px;
    padding: 0.48rem 0.82rem;
}

.list-accordion-panel {
    border-top: 1px solid rgba(215, 223, 236, 0.9);
}

.list-accordion-panel-inner {
    display: grid;
    gap: 0.75rem;
    padding: 0.95rem 1rem 1rem;
}

.list-card-content {
    display: grid;
    gap: 0.55rem;
    min-width: 0;
    flex: 1 1 auto;
}

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

.list-head-actions {
    display: flex;
    gap: 0.35rem;
    flex-shrink: 0;
}

.list-edit-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    min-height: 2rem;
    padding: 0.3rem 0.65rem;
    border-radius: 999px;
    background: rgba(31, 111, 235, 0.1);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
}

.list-edit-link:hover,
.list-edit-link:focus-visible {
    background: rgba(31, 111, 235, 0.16);
}

.list-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    color: var(--muted);
    font-size: 0.88rem;
}

.list-meta span {
    padding: 0.32rem 0.6rem;
    border: 1px solid rgba(31, 111, 235, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.75);
    white-space: nowrap;
}

.list-secondary-link {
    color: var(--primary);
    font-weight: 600;
    text-align: center;
}

.list-inline-link {
    display: inline-flex;
    align-items: center;
    min-height: 2rem;
    padding: 0.3rem 0.1rem;
}

.list-secondary-link:hover,
.list-secondary-link:focus-visible {
    text-decoration: underline;
}

.list-actions-mobile {
    display: none;
}

.list-actions {
    align-self: stretch;
    justify-content: center;
    flex-direction: column;
    align-items: stretch;
    min-width: 190px;
    padding-left: 0.25rem;
    border-left: 1px solid rgba(215, 223, 236, 0.9);
}

.training-layout {
    display: grid;
    gap: 1rem;
}

.training-stage {
    display: grid;
    gap: 1rem;
    justify-items: center;
}

.status-row {
    width: min(100%, 680px);
    justify-content: space-between;
}

.flashcard {
    width: min(100%, 680px);
    min-height: 360px;
    border: 0;
    background: transparent;
    padding: 0;
    cursor: pointer;
}

.flashcard-inner {
    position: relative;
    display: block;
    width: 100%;
    min-height: 360px;
}

.flashcard-face {
    position: absolute;
    inset: 0;
    display: grid;
    grid-template-rows: auto 1fr auto;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    border-radius: 28px;
    border: 1px solid rgba(215, 223, 236, 0.9);
    background: linear-gradient(180deg, #ffffff 0%, #eef4ff 100%);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: scale(0.985);
    transition: opacity 0.42s ease, transform 0.42s ease, visibility 0.42s ease, box-shadow 0.42s ease, filter 0.42s ease;
    filter: saturate(0.97);
}

.flashcard-back {
    background: linear-gradient(180deg, #ffffff 0%, #f6fbf8 100%);
    transition: opacity 0.82s ease, transform 0.74s ease, visibility 0.82s ease, box-shadow 0.74s ease, filter 0.74s ease;
    filter: brightness(0.98) saturate(1);
}

.flashcard[data-side="front"] .flashcard-front,
.flashcard[data-side="back"] .flashcard-back {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
    filter: none;
}

.flashcard[data-side="back"] .flashcard-back {
    box-shadow: 0 22px 46px rgba(20, 36, 73, 0.13);
    background:
        radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.92), transparent 34%),
        linear-gradient(180deg, #ffffff 0%, #f6fbf8 100%);
}

.flashcard strong {
    align-self: center;
    font-size: clamp(1.9rem, 4vw, 3rem);
    line-height: 1.2;
    text-align: center;
}

.card-label {
    align-self: start;
}

.flashcard small {
    align-self: end;
    color: var(--muted);
    text-align: center;
    max-width: 42ch;
    min-height: 1.2em;
}

.card-detail-block {
    display: block;
    font-size: 0.98rem;
    line-height: 1.55;
}

.flashcard-back {
    grid-template-rows: auto auto 1fr auto;
}

#card-extended-answer-text {
    align-self: center;
    justify-self: stretch;
    color: var(--ink);
    width: 100%;
    font-size: clamp(1.18rem, 2.5vw, 1.55rem);
    font-weight: 700;
    line-height: 1.45;
    text-align: center;
    max-width: none;
}

#card-back-text {
    align-self: start;
}

.flashcard small:empty {
    visibility: hidden;
}

.danger-panel {
    border-color: rgba(200, 59, 59, 0.3);
}

.admin-assign-layout {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
}

.admin-column {
    display: grid;
    gap: 1rem;
}

.admin-filter-grid {
    display: grid;
    gap: 0.85rem;
}

.admin-filter-grid-users {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.admin-filter-span-full {
    grid-column: 1 / -1;
}

.admin-item-search-grid,
.admin-item-update-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.stack-form .admin-inline-check {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text);
    justify-self: start;
}

.admin-inline-check input,
.admin-group-radio input {
    width: auto;
}

.stack-form .admin-group-radio {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-weight: 600;
    justify-self: start;
}

.admin-item-group-selected {
    background: rgba(31, 111, 235, 0.08);
}

.admin-selection-list {
    display: grid;
    gap: 0.75rem;
    max-height: 32rem;
    overflow-y: auto;
    padding-right: 0.25rem;
}

.admin-selection-item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.85rem;
    align-items: start;
    padding: 0.95rem 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: linear-gradient(180deg, #ffffff 0%, #eef4ff 100%);
}

.admin-selection-item:hover,
.admin-selection-item:focus-within {
    border-color: rgba(31, 111, 235, 0.34);
}

.admin-selection-check {
    padding-top: 0.15rem;
}

.admin-selection-body {
    display: grid;
    gap: 0.28rem;
    min-width: 0;
}

.selection-summary {
    display: grid;
    gap: 0.6rem;
    padding: 1rem 1.05rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-small);
    background: var(--panel-soft);
}

.selection-summary strong {
    font-size: 0.95rem;
}

.selection-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.selection-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.65rem;
    border: 1px solid rgba(31, 111, 235, 0.16);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.9);
    font-size: 0.92rem;
}

.selection-tag-remove {
    border: 0;
    background: transparent;
    color: var(--primary);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    padding: 0;
}

.admin-assign-actions {
    display: grid;
    gap: 0.85rem;
    justify-items: start;
    grid-column: 1 / -1;
}

.admin-users-filter-grid {
    grid-template-columns: minmax(0, 2fr) minmax(180px, 1fr) minmax(180px, 1fr) auto;
    align-items: end;
}

.admin-users-table td strong {
    display: block;
    margin-bottom: 0.2rem;
}

.admin-user-inline-form {
    display: grid;
    gap: 0.75rem;
}

.admin-user-inline-form label {
    display: grid;
    gap: 0.35rem;
}

.admin-pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
}

.admin-pagination-pages {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.admin-pagination-current {
    background: rgba(31, 111, 235, 0.12);
    border-color: rgba(31, 111, 235, 0.28);
    color: var(--primary);
}

.button.is-disabled {
    pointer-events: none;
    opacity: 0.5;
}

@media (prefers-reduced-motion: reduce) {
    .button,
    .flashcard-face {
        transition: none;
    }
}

@media (max-width: 900px) {
    .hero,
    .overview-grid,
    .overview-lower-grid,
    .edit-grid,
    .admin-dashboard-grid {
        grid-template-columns: 1fr;
    }

    .admin-filter-grid-users {
        grid-template-columns: 1fr;
    }

    .admin-item-search-grid,
    .admin-item-update-grid {
        grid-template-columns: 1fr;
    }

    .admin-users-filter-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .author-stats-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .author-stats-table-wrap {
        overflow-x: auto;
    }

    .author-stats-table {
        table-layout: auto;
        min-width: 900px;
    }
}

@media (max-width: 520px) {
    .author-stats-summary {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .site-header,
    .site-footer,
    .page-head,
    .status-row,
    .hero-actions,
    .head-actions,
    .training-actions,
    .list-card,
    .list-accordion-row,
    .inline-form {
        flex-direction: column;
        align-items: stretch;
    }

    .site-shell {
        width: min(100% - 1rem, 1120px);
    }

    .mode-selector {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
    }

    .mode-heading {
        flex-direction: column;
        align-items: stretch;
    }

    .mode-selector .button {
        width: 100%;
        justify-content: center;
    }

    .activity-panel .activity-list {
        margin-top: 0.35rem;
    }

    .list-search-count {
        display: none;
    }

    .list-search-bar {
        gap: 0.5rem;
    }

    .list-search-toggle {
        display: inline-flex;
        flex: 0 0 auto;
    }

    .list-search-field {
        display: none;
    }

    .list-search-bar.is-open {
        flex: 1 1 auto;
    }

    .list-search-bar.is-open .list-search-field {
        display: block;
        flex: 1 1 auto;
    }

    .list-search-bar.is-open .list-search-field input {
        width: 100%;
    }

    .list-card-head {
        justify-content: space-between;
    }

    .list-accordion-main {
        width: 100%;
    }

    .list-row-actions {
        width: 100%;
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 0.5rem;
    }

    .list-accordion-toggle,
    .list-train-button {
        min-width: 0;
        width: 100%;
    }

    .list-actions {
        display: none;
    }

    .list-actions-mobile {
        display: grid;
        gap: 0.5rem;
        margin-top: 0.2rem;
    }

    .focus-grid-cards {
        display: grid;
        grid-template-columns: 1fr;
    }

    .stats-column-headings,
    .stats-compact-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .flashcard,
    .flashcard-inner {
        min-height: 300px;
    }

    #card-back-text {
        font-size: clamp(1.5rem, 3.6vw, 2.1rem);
    }

    .button-large,
    .button-block {
        width: 100%;
    }

    .mode-heading {
        align-items: stretch;
    }
}