:root {
    --bg: #f7f7f5;
    --surface: #ffffff;
    --border: #e4e4e0;
    --text: #1a1a18;
    --text-muted: #6f6f6a;
    --accent: #2f5e46;
    --accent-soft: #e8f0eb;
    --ok: #1d7a4f;
    --ok-bg: #e6f4ec;
    --warn: #9a6700;
    --warn-bg: #fdf3d7;
    --danger: #b3261e;
    --danger-bg: #fbecea;
    --radius: 10px;
    --shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 4px 12px rgba(0, 0, 0, .05);
    --accent-hover: #274f3b;
    --control-bg: #fbfbfa;
    --hover: rgba(232, 240, 235, .45);
    --backdrop: rgba(26, 26, 24, .38);
    --focus: rgba(47, 94, 70, .14);
    --shadow-modal: 0 18px 60px rgba(0, 0, 0, .16);
    --radius-control: 8px;
    --nav-height: 58px;
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    background: var(--bg);
    color-scheme: light;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    text-rendering: optimizeLegibility;
}

body.modal-open {
    overflow: hidden;
}

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

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

a:hover {
    text-decoration: underline;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1,
.page-title {
    margin-bottom: 0;
    font-size: 22px;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -.015em;
}

h2,
.card-title {
    margin-bottom: 0;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
}

h3 {
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
}

main,
.page-shell {
    width: min(100% - 40px, 1280px);
    margin: 0 auto;
    padding: 28px 0 64px;
}

.page-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 14px 20px;
    margin-bottom: 20px;
}

.page-header__title {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.page-header__actions,
.actions,
.toolbar,
.summary,
.chip-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.spacer {
    flex: 1 1 auto;
}

.muted,
.hint {
    color: var(--text-muted);
    font-size: 12.5px;
}

.eyebrow {
    margin-bottom: 5px;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .03em;
    text-transform: uppercase;
}

.num,
.metric,
.progress-value {
    font-variant-numeric: tabular-nums;
}

.num {
    text-align: right;
}

.wrap {
    min-width: 190px;
    white-space: normal;
}

/* Navigation */

.top {
    position: sticky;
    top: 0;
    z-index: 100;
    min-height: var(--nav-height);
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.top__inner,
header.top {
    width: min(100% - 40px, 1280px);
    min-height: var(--nav-height);
    margin: 0 auto;
    display: flex;
    align-items: stretch;
    gap: 20px;
}

header.top {
    width: 100%;
    padding: 0 max(20px, calc((100% - 1280px) / 2));
}

.brand {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    color: var(--text);
    font-size: 15px;
    font-weight: 650;
    letter-spacing: -.01em;
    white-space: nowrap;
}

.top nav,
.top__nav {
    display: flex;
    align-items: stretch;
    gap: 4px;
}

.top nav a,
.top__nav a {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 0 10px;
    color: var(--text-muted);
    font-size: 13.5px;
    font-weight: 500;
    white-space: nowrap;
}

.top nav a:hover,
.top__nav a:hover,
.top nav a.active,
.top__nav a.active {
    color: var(--accent);
    text-decoration: none;
}

.top nav a.active::after,
.top__nav a.active::after {
    content: "";
    position: absolute;
    right: 10px;
    bottom: -1px;
    left: 10px;
    height: 2px;
    border-radius: 2px 2px 0 0;
    background: var(--accent);
}

.top__actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

.top .exit {
    align-self: center;
    color: var(--text-muted);
    font-size: 13px;
}

/* Cards and layout */

.card,
.tile,
.panel,
.table-card {
    margin-bottom: 22px;
    border: 0;
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.card > h2,
.card__header,
.panel__header {
    min-height: 52px;
    margin: 0;
    padding: 16px 22px 12px;
    border-bottom: 0;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.card > .body,
.card__body,
.panel__body {
    padding: 6px 22px 22px;
}

.card > h2 + .body {
    padding-top: 2px;
}

.section-stack {
    display: grid;
    gap: 22px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 16px;
}

.grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.cols {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

/* Ячейка грида по умолчанию не уже своего содержимого. Из-за этого широкая
   таблица внутри колонки растягивала всю страницу на телефоне. */
.cols > *,
.grid > *,
.split-layout > * {
    min-width: 0;
}

.split-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.9fr) minmax(300px, .8fr);
    align-items: start;
    gap: 22px;
}

.tiles,
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 22px;
}

.tile {
    min-width: 0;
    margin-bottom: 0;
    padding: 20px 22px;
}

.tile h3 {
    margin-bottom: 12px;
    color: var(--text-muted);
    font-size: 12.5px;
    font-weight: 500;
}

.tile .num-big,
.kpi-card__value {
    font-size: 28px;
    font-weight: 650;
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
    letter-spacing: -.025em;
}

.kpi-card__label {
    margin-top: 7px;
    color: var(--text-muted);
    font-size: 12.5px;
}

.tile table {
    font-size: 13px;
}

.tile table td {
    height: 32px;
    padding: 4px 0;
    border-bottom: 0;
}

/* Controls */

label {
    color: var(--text-muted);
    font-size: 12.5px;
    font-weight: 500;
}

label > input:not([type="checkbox"]):not([type="radio"]),
label > select,
label > textarea {
    width: 100%;
    margin-top: 5px;
}

input[type="text"],
input[type="date"],
input[type="number"],
input[type="password"],
input[type="search"],
input[type="file"],
select,
textarea {
    min-height: 36px;
    max-width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-control);
    outline: 0;
    background: var(--surface);
    color: var(--text);
    transition: border-color 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

input[type="file"] {
    min-height: 42px;
    padding: 7px;
}

textarea {
    width: 100%;
    min-height: 92px;
    resize: vertical;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
    opacity: .75;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--focus);
}

input[type="checkbox"],
input[type="radio"] {
    width: 16px;
    height: 16px;
    margin: 0;
    accent-color: var(--accent);
}

.check,
label.check {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text);
    font-size: 13px;
    font-weight: 400;
    white-space: nowrap;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 18px;
}

.checkbox-tile {
    min-height: 42px;
    padding: 10px 12px;
    border-radius: var(--radius-control);
    background: var(--control-bg);
}

button,
.btn {
    min-height: 36px;
    padding: 7px 13px;
    border: 1px solid var(--border);
    border-radius: var(--radius-control);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    font-size: 13.5px;
    font-weight: 550;
    line-height: 1;
    white-space: nowrap;
    transition: background 120ms ease, border-color 120ms ease, color 120ms ease,
        box-shadow 120ms ease;
}

button:hover,
.btn:hover {
    border-color: var(--text-muted);
    background: var(--control-bg);
    text-decoration: none;
}

button:focus-visible,
.btn:focus-visible {
    outline: 0;
    box-shadow: 0 0 0 3px var(--focus);
}

button.primary,
.btn.primary,
.btn--primary {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--surface);
}

button.primary:hover,
.btn.primary:hover,
.btn--primary:hover {
    border-color: var(--accent-hover);
    background: var(--accent-hover);
}

button.secondary,
.btn.secondary,
.btn--secondary {
    border-color: var(--border);
    background: var(--surface);
    color: var(--accent);
}

button.text,
.btn.text,
.btn--text {
    min-height: 30px;
    padding: 4px 7px;
    border-color: transparent;
    background: transparent;
    color: var(--text-muted);
}

button.text:hover,
.btn.text:hover,
.btn--text:hover {
    background: var(--accent-soft);
    color: var(--accent);
}

button.danger,
.btn.danger,
.danger-link {
    border-color: transparent;
    background: transparent;
    color: var(--danger);
}

button.danger:hover,
.btn.danger:hover,
.danger-link:hover {
    background: var(--danger-bg);
}

button.small,
.btn.small {
    min-height: 28px;
    padding: 5px 8px;
    font-size: 12px;
}

button[disabled],
.btn[aria-disabled="true"] {
    cursor: not-allowed;
    opacity: .5;
}

.actions {
    margin-top: 16px;
}

.toolbar {
    margin-bottom: 18px;
    padding: 14px;
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.toolbar .grow {
    flex: 1 1 280px;
}

.toolbar .count {
    color: var(--text-muted);
    font-size: 12.5px;
}

.filter-toolbar {
    position: sticky;
    top: calc(var(--nav-height) + 10px);
    z-index: 70;
}

.search-field {
    position: relative;
    flex: 0 1 320px;
}

.search-field::before {
    content: "⌕";
    position: absolute;
    top: 50%;
    left: 11px;
    z-index: 1;
    color: var(--text-muted);
    font-size: 18px;
    line-height: 1;
    transform: translateY(-52%);
    pointer-events: none;
}

.search-field input {
    width: 100%;
    padding-left: 34px;
}

.segment {
    display: inline-flex;
    padding: 3px;
    border-radius: var(--radius-control);
    background: var(--accent-soft);
}

.segment a,
.segment button {
    min-width: 52px;
    min-height: 32px;
    padding: 6px 12px;
    border: 0;
    background: transparent;
    color: var(--text-muted);
    box-shadow: none;
}

.segment a:hover,
.segment button:hover,
.segment .active {
    border: 0;
    background: var(--surface);
    color: var(--accent);
    box-shadow: var(--shadow);
    text-decoration: none;
}

/* Tables */

.table-wrap {
    width: 100%;
    overflow-x: auto;
    border: 0;
    border-radius: var(--radius-control);
    background: var(--surface);
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--surface);
    font-size: 13.5px;
}

th,
td {
    height: 44px;
    padding: 9px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: middle;
    white-space: nowrap;
}

thead th {
    position: sticky;
    top: 0;
    z-index: 2;
    background: var(--surface);
    color: var(--text-muted);
    font-size: 11.5px;
    font-weight: 650;
    letter-spacing: .03em;
    text-transform: uppercase;
}

tbody tr {
    transition: background 100ms ease;
}

tbody tr:hover {
    background: var(--hover);
}

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

th.sortable {
    cursor: pointer;
    user-select: none;
}

th.sortable::after {
    content: " ↕";
    visibility: hidden;
    color: var(--text-muted);
    font-size: 11px;
}

th.sortable:hover::after {
    visibility: visible;
}

th.sortable.asc::after {
    content: " ↑";
    visibility: visible;
    color: var(--accent);
}

th.sortable.desc::after {
    content: " ↓";
    visibility: visible;
    color: var(--accent);
}

tr.row-red {
    background: var(--danger-bg);
}

tr.row-yellow {
    background: var(--warn-bg);
}

tr.row-done td {
    color: var(--text-muted);
}

tr.is-clickable {
    cursor: pointer;
}

.row-action {
    color: var(--text-muted);
    opacity: 0;
    transition: opacity 100ms ease, color 100ms ease;
}

tr:hover .row-action,
.row-action:focus-visible {
    color: var(--accent);
    opacity: 1;
}

/* Badges and progress */

.tag,
.badge,
.chip {
    min-height: 22px;
    padding: 2px 10px;
    border: 0;
    border-radius: 999px;
    background: var(--control-bg);
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.3;
    white-space: nowrap;
}

a.chip:hover,
button.chip:hover {
    background: var(--accent-soft);
    color: var(--accent);
    text-decoration: none;
}

.tag.green,
.tag.ok,
.badge--ok,
.chip--ok {
    background: var(--ok-bg);
    color: var(--ok);
}

.tag.yellow,
.tag.warn,
.badge--warn,
.chip--warn {
    background: var(--warn-bg);
    color: var(--warn);
}

.tag.red,
.tag.danger,
.badge--danger,
.chip--danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-muted);
}

.dot.green {
    background: var(--ok);
}

.dot.yellow {
    background: var(--warn);
}

.dot.red {
    background: var(--danger);
}

.progress,
.bar {
    width: 100%;
    height: 6px;
    overflow: hidden;
    border: 0;
    border-radius: 999px;
    background: var(--border);
    display: block;
}

.bar {
    width: 76px;
    margin-right: 0;
    vertical-align: middle;
}

.progress > span,
.bar > span {
    height: 100%;
    border-radius: inherit;
    display: block;
}

.progress > .green,
.bar > .green,
.progress--ok > span {
    background: var(--ok);
}

.progress > .yellow,
.bar > .yellow,
.progress--warn > span {
    background: var(--warn);
}

.progress > .red,
.bar > .red,
.progress--danger > span {
    background: var(--danger);
}

.progress-inline {
    min-width: 130px;
    display: grid;
    grid-template-columns: minmax(72px, 1fr) 38px;
    align-items: center;
    gap: 8px;
}

.progress-value {
    color: var(--text);
    font-size: 12.5px;
    text-align: right;
}

/* Messages and empty states */

.msg,
.toast {
    position: relative;
    padding: 12px 14px 12px 16px;
    border: 0;
    border-radius: var(--radius-control);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.msg {
    margin-bottom: 18px;
}

.msg::before,
.toast::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 3px;
    border-radius: var(--radius-control) 0 0 var(--radius-control);
    background: var(--accent);
}

.msg.ok {
    background: var(--ok-bg);
    color: var(--ok);
}

.msg.ok::before {
    background: var(--ok);
}

.msg.err {
    background: var(--danger-bg);
    color: var(--danger);
}

.msg.err::before {
    background: var(--danger);
}

.toast-stack {
    position: fixed;
    top: calc(var(--nav-height) + 16px);
    right: 20px;
    z-index: 300;
    width: min(380px, calc(100% - 40px));
    display: grid;
    gap: 8px;
}

.toast {
    transition: opacity 150ms ease, transform 150ms ease;
}

.toast.is-leaving {
    opacity: 0;
    transform: translateY(-4px);
}

.empty-state {
    min-height: 190px;
    padding: 34px 20px;
    display: grid;
    place-items: center;
    text-align: center;
}

.empty-state__icon {
    margin-bottom: 10px;
    font-size: 34px;
    line-height: 1;
}

.empty-state__title {
    margin-bottom: 4px;
    font-size: 15px;
    font-weight: 600;
}

.empty-state__text {
    max-width: 480px;
    margin: 0;
    color: var(--text-muted);
    font-size: 12.5px;
}

/* Details, tabs and modals */

details.inline summary,
.disclosure summary {
    width: fit-content;
    cursor: pointer;
    color: var(--accent);
    font-size: 13px;
    font-weight: 500;
    list-style: none;
}

details.inline summary::-webkit-details-marker,
.disclosure summary::-webkit-details-marker {
    display: none;
}

details.inline summary::before,
.disclosure summary::before {
    content: "›";
    margin-right: 6px;
    display: inline-block;
    transition: transform 120ms ease;
}

details[open].inline summary::before,
.disclosure[open] summary::before {
    transform: rotate(90deg);
}

details.inline > div,
.disclosure__body {
    padding: 16px 0 4px;
}

.tabs {
    display: flex;
    align-items: stretch;
    gap: 4px;
    overflow-x: auto;
    border-bottom: 1px solid var(--border);
    scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
    display: none;
}

.tab-button {
    position: relative;
    min-height: 44px;
    padding: 8px 12px;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--text-muted);
    box-shadow: none;
}

.tab-button:hover {
    border: 0;
    background: transparent;
    color: var(--accent);
}

.tab-button.is-active {
    color: var(--accent);
}

.tab-button.is-active::after {
    content: "";
    position: absolute;
    right: 10px;
    bottom: -1px;
    left: 10px;
    height: 2px;
    border-radius: 2px 2px 0 0;
    background: var(--accent);
}

.tab-panel[hidden] {
    display: none;
}

.tab-panel {
    padding-top: 22px;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 500;
    padding: 20px;
    background: var(--backdrop);
    display: none;
    place-items: center;
}

.modal.is-open {
    display: grid;
}

.modal__dialog {
    width: min(100%, 760px);
    max-height: calc(100vh - 40px);
    overflow: auto;
    border-radius: calc(var(--radius) + 2px);
    background: var(--surface);
    box-shadow: var(--shadow-modal);
}

.modal__header {
    position: sticky;
    top: 0;
    z-index: 2;
    min-height: 58px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.modal__body {
    padding: 20px;
}

.modal__close {
    width: 34px;
    min-width: 34px;
    height: 34px;
    min-height: 34px;
    padding: 0;
    border-color: transparent;
    background: transparent;
    color: var(--text-muted);
    font-size: 22px;
    font-weight: 400;
}

/* Student page */

.student-sticky {
    position: sticky;
    top: var(--nav-height);
    z-index: 80;
    margin-bottom: 22px;
    padding: 17px 20px 0;
    border-radius: 0 0 var(--radius) var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.student-head {
    padding-bottom: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.student-head .big {
    font-size: 22px;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -.015em;
}

.student-head .pct {
    font-size: 28px;
    font-weight: 650;
    font-variant-numeric: tabular-nums;
    line-height: 1;
}

.student-head__meta {
    margin-top: 5px;
    color: var(--text-muted);
    font-size: 12.5px;
}

.student-head__progress {
    min-width: 280px;
    display: grid;
    grid-template-columns: 58px minmax(120px, 1fr);
    align-items: center;
    gap: 8px 14px;
}

.student-head__progress .chip-row {
    grid-column: 1 / -1;
    justify-content: flex-end;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.summary-card {
    min-height: 116px;
    padding: 18px;
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
    color: var(--text);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.summary-card:hover {
    background: var(--accent-soft);
    text-decoration: none;
}

.summary-card__title {
    color: var(--text-muted);
    font-size: 12.5px;
}

.summary-card__value {
    font-size: 18px;
    font-weight: 600;
}

.notes-feed {
    display: grid;
    gap: 12px;
}

.note-card {
    padding: 16px 18px;
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.note-card__meta {
    margin-bottom: 7px;
    color: var(--text-muted);
    font-size: 12px;
}

.note-card__text {
    white-space: pre-wrap;
}

/* Dashboard charts */

.chart-card {
    min-height: 300px;
}

.dashboard-grid {
    margin-bottom: 22px;
}

.chart-canvas-wrap {
    position: relative;
    height: 228px;
}

.chart-canvas-wrap--donut {
    height: 210px;
}

.grade-language-list {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.grade-language-row {
    padding: 8px 10px;
    border-radius: 8px;
    background: var(--control-bg);
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    font-size: 12.5px;
}

.chart-split {
    display: grid;
    grid-template-columns: minmax(180px, .85fr) minmax(210px, 1fr);
    align-items: center;
    gap: 20px;
}

.class-progress-row {
    min-height: 44px;
    display: grid;
    grid-template-columns: 116px minmax(120px, 1fr) 48px;
    align-items: center;
    gap: 14px;
}

.worst-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.worst-card__header {
    min-height: 54px;
    padding: 0 0 12px;
}

.worst-list {
    display: grid;
    gap: 15px;
}

.worst-item__line {
    margin-bottom: 7px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 8px;
    font-size: 12.5px;
}

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

.bar-row {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr) 42px;
    align-items: center;
    gap: 12px;
}

.bar-row__track {
    height: 24px;
    overflow: hidden;
    border-radius: 6px;
    background: var(--accent-soft);
}

.bar-row__fill {
    min-width: 4px;
    height: 100%;
    border-radius: inherit;
    background: var(--accent);
}

.donut-layout {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    align-items: center;
    gap: 20px;
}

.donut {
    width: 170px;
    height: 170px;
    transform: rotate(-90deg);
}

.donut circle {
    fill: none;
    stroke-width: 20;
}

.donut__track {
    stroke: var(--border);
}

.donut__segment--1 {
    stroke: var(--accent);
}

.donut__segment--2 {
    stroke: var(--ok);
}

.donut__segment--3 {
    stroke: var(--warn);
}

.donut__segment--4 {
    stroke: var(--danger);
}

.legend {
    display: grid;
    gap: 9px;
}

.legend__item {
    display: grid;
    grid-template-columns: 9px minmax(0, 1fr) auto;
    align-items: center;
    gap: 8px;
    font-size: 12.5px;
}

.legend__dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
}

.legend__dot--2 {
    background: var(--ok);
}

.legend__dot--3 {
    background: var(--warn);
}

.legend__dot--4 {
    background: var(--danger);
}

.funnel {
    display: grid;
    justify-items: center;
    gap: 9px;
}

.funnel__step {
    min-width: 44%;
    padding: 10px 14px;
    border-radius: 7px;
    background: var(--accent-soft);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    font-size: 12.5px;
    font-weight: 550;
}

.funnel__step:nth-child(2) {
    background: var(--ok-bg);
    color: var(--ok);
}

.funnel__step:nth-child(3) {
    background: var(--warn-bg);
    color: var(--warn);
}

.funnel__step:nth-child(4) {
    background: var(--danger-bg);
    color: var(--danger);
}

.mini-bar {
    height: 5px;
    overflow: hidden;
    border-radius: 999px;
    background: var(--border);
}

.mini-bar > span {
    height: 100%;
    border-radius: inherit;
    background: var(--accent);
    display: block;
}

/* Deadlines, risk and import */

.day-group {
    margin-bottom: 18px;
}

.day-group > .day {
    position: sticky;
    top: var(--nav-height);
    z-index: 5;
    margin: 0;
    padding: 10px 14px;
    border: 0;
    border-radius: var(--radius) var(--radius) 0 0;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
}

.deadline-list {
    padding: 0 14px;
}

.deadline-row {
    min-height: 62px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    display: grid;
    grid-template-columns: minmax(150px, .9fr) minmax(220px, 1.5fr) minmax(140px, 1fr) auto;
    align-items: center;
    gap: 14px;
}

.deadline-row:last-child {
    border-bottom: 0;
}

.deadline-row__task {
    white-space: normal;
}

.manual-card {
    position: sticky;
    top: calc(var(--nav-height) + 18px);
}

.manual-list {
    margin-top: 20px;
    display: grid;
    gap: 10px;
}

.manual-item {
    padding: 13px 14px;
    border-radius: var(--radius-control);
    background: var(--control-bg);
}

.manual-item__date {
    margin-bottom: 3px;
    color: var(--text-muted);
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: .03em;
    text-transform: uppercase;
}

.risk-card__head {
    padding: 17px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.risk-card__identity {
    min-width: 210px;
}

.risk-card__progress {
    flex: 1 1 220px;
    max-width: 360px;
}

.risk-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.risk-list li {
    min-height: 42px;
    padding: 9px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.risk-list li:nth-child(n + 6) {
    display: none;
}

.risk-card.is-expanded .risk-list li {
    display: flex;
}

.risk-card__more {
    padding: 8px 14px 12px;
    border-top: 1px solid var(--border);
}

.risk-phone {
    margin-top: 4px;
    display: inline-block;
    font-size: 12.5px;
}

.steps {
    margin-bottom: 22px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    color: var(--text-muted);
    font-size: 12px;
}

.step {
    position: relative;
    display: grid;
    justify-items: center;
    gap: 7px;
    text-align: center;
}

.step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 15px;
    left: calc(50% + 20px);
    right: calc(-50% + 20px);
    height: 1px;
    background: var(--border);
}

.step__number {
    position: relative;
    z-index: 1;
    width: 30px;
    height: 30px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--surface);
    display: grid;
    place-items: center;
    font-weight: 600;
}

.step.is-active {
    color: var(--accent);
}

.step.is-active .step__number {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--surface);
}

.step.is-done {
    color: var(--ok);
}

.step.is-done .step__number {
    border-color: var(--ok);
    background: var(--ok-bg);
    color: var(--ok);
}

.map-row {
    min-height: 58px;
    padding: 9px 0;
    border-bottom: 1px solid var(--border);
    display: grid;
    grid-template-columns: minmax(180px, .8fr) 24px minmax(220px, 1fr) minmax(160px, .8fr);
    align-items: center;
    gap: 12px;
}

.map-row:last-child {
    border-bottom: 0;
}

.map-row .from {
    flex: initial;
    font-weight: 600;
}

.map-row .sample {
    color: var(--text-muted);
    font-size: 12px;
}

.map-table-head {
    min-height: 34px;
    display: grid;
    grid-template-columns: minmax(180px, .8fr) 24px minmax(220px, 1fr) minmax(160px, .8fr);
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 11.5px;
    font-weight: 650;
    letter-spacing: .03em;
    text-transform: uppercase;
}

.map-arrow {
    color: var(--accent);
    text-align: center;
}

.templates-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.import-order {
    margin: 0;
    padding-left: 20px;
}

.import-order li + li {
    margin-top: 10px;
}

.import-counts {
    margin-bottom: 22px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.import-counts--compact {
    margin: 20px auto 0;
}

.stat-chip {
    min-height: 72px;
    padding: 12px 16px;
    border-radius: var(--radius);
    background: var(--accent-soft);
    color: var(--accent);
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 7px;
}

.stat-chip b {
    font-size: 24px;
    font-variant-numeric: tabular-nums;
}

.stat-chip span {
    font-size: 12.5px;
}

.stat-chip--ok {
    background: var(--ok-bg);
    color: var(--ok);
}

.stat-chip--muted {
    background: var(--control-bg);
    color: var(--text-muted);
}

.stat-chip--danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.stat-chip--warn {
    background: var(--warn-bg);
    color: var(--warn);
}

.import-commit {
    position: sticky;
    bottom: 12px;
    z-index: 20;
    padding: 12px 14px;
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

/* Files, documents and dossier */

.file-thumb {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    overflow: hidden;
    border-radius: var(--radius-control);
    background: var(--control-bg);
    display: grid;
    place-items: center;
    color: var(--text-muted);
    font-size: 15px;
}

.file-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.file-cell {
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-drop {
    padding: 14px;
    border: 1px dashed var(--border);
    border-radius: var(--radius-control);
    background: var(--control-bg);
}

.attach-mark {
    margin-left: 5px;
    color: var(--text-muted);
    font-size: 12px;
}

.attach-list {
    margin: 12px 0 0;
    padding: 0;
    display: grid;
    gap: 8px;
    list-style: none;
}

.attach-list li {
    padding: 8px 10px;
    border-radius: var(--radius-control);
    background: var(--control-bg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 600;
    padding: 24px;
    background: var(--backdrop);
    display: none;
    place-items: center;
}

.lightbox.is-open {
    display: grid;
}

.lightbox__figure {
    max-width: min(100%, 1000px);
    max-height: calc(100vh - 48px);
    margin: 0;
    padding: 14px;
    border-radius: calc(var(--radius) + 2px);
    background: var(--surface);
    box-shadow: var(--shadow-modal);
    display: grid;
    gap: 10px;
    justify-items: center;
}

.lightbox__figure img {
    max-width: 100%;
    max-height: calc(100vh - 150px);
    border-radius: var(--radius-control);
    object-fit: contain;
}

.lightbox__caption {
    color: var(--text-muted);
    font-size: 12.5px;
    text-align: center;
}

/* Settings */

.settings-layout {
    display: grid;
    grid-template-columns: minmax(200px, 220px) minmax(0, 1fr);
    align-items: start;
    gap: 22px;
}

/* Без этого колонки грида растягиваются под содержимое,
   и на узком экране страница уезжает вправо. */
.settings-layout > * {
    min-width: 0;
}

.settings-menu {
    position: sticky;
    top: calc(var(--nav-height) + 18px);
    padding: 10px;
    display: grid;
    gap: 2px;
}

.settings-menu a {
    min-height: 38px;
    padding: 8px 12px;
    border-radius: var(--radius-control);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    font-size: 13.5px;
    font-weight: 500;
}

.settings-menu a:hover {
    background: var(--hover);
    color: var(--accent);
    text-decoration: none;
}

.settings-menu a.is-active {
    background: var(--accent-soft);
    color: var(--accent);
}

/* AI assistant */

.ai-launcher {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 400;
    min-height: 44px;
    padding: 10px 16px;
    border-color: var(--accent);
    border-radius: 999px;
    background: var(--accent);
    color: var(--surface);
    box-shadow: var(--shadow-modal);
}

.ai-launcher:hover {
    border-color: var(--accent-hover);
    background: var(--accent-hover);
    color: var(--surface);
}

.ai-launcher.is-off {
    border-color: var(--border);
    background: var(--control-bg);
    color: var(--text-muted);
}

.ai-launcher.is-off:hover {
    border-color: var(--text-muted);
    background: var(--control-bg);
    color: var(--text-muted);
}

.ai-panel {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 450;
    width: min(420px, calc(100% - 40px));
    max-height: min(640px, calc(100vh - 40px));
    border-radius: calc(var(--radius) + 2px);
    background: var(--surface);
    box-shadow: var(--shadow-modal);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
}

.ai-panel[hidden] {
    display: none;
}

.ai-panel__header {
    min-height: 58px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.ai-panel__log {
    min-height: 180px;
    padding: 16px 18px;
    overflow-y: auto;
    display: grid;
    align-content: start;
    gap: 12px;
}

.ai-msg {
    max-width: 90%;
    padding: 10px 13px;
    border-radius: var(--radius);
    font-size: 13.5px;
    line-height: 1.5;
}

.ai-msg p {
    margin: 0 0 7px;
}

.ai-msg p:last-child {
    margin-bottom: 0;
}

.ai-msg--user {
    justify-self: end;
    background: var(--accent-soft);
    color: var(--accent);
}

.ai-msg--bot {
    justify-self: start;
    background: var(--control-bg);
}

.ai-msg--error {
    justify-self: start;
    background: var(--danger-bg);
    color: var(--danger);
}

.ai-msg--thinking {
    color: var(--text-muted);
    font-style: italic;
}

/* ---------------------------------------------------------------------------
   ИИ-импорт: экран подтверждения (промпт №4)
   --------------------------------------------------------------------------- */

.ai-verdict {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.ai-verdict__kind {
    font-size: 20px;
    font-weight: 650;
}

/* Главный способ импорта — ИИ. Выделен акцентной полосой сверху. */
.ai-import-hero {
    border-top: 3px solid var(--accent);
}

.notice-list {
    margin: 8px 0 14px;
    padding-left: 20px;
}

.notice-list li {
    margin-bottom: 5px;
}

.notice-list--err li {
    color: var(--danger);
}

/* Заметная строка «Показано: N». Должна бросаться в глаза и меняться
   при любом фильтре — иначе непонятно, сколько учеников осталось. */
.shown-count {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 999px;
    background: var(--control-bg);
    color: var(--text);
    font-size: 14px;
    font-weight: 650;
    white-space: nowrap;
}

.shown-count--filtered {
    background: var(--accent-soft);
    color: var(--accent);
}

.count-chip {
    display: inline-block;
    min-width: 24px;
    padding: 1px 8px;
    margin-left: 6px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 13px;
    font-weight: 650;
    vertical-align: middle;
}

/* Таблица найденных записей: поля правятся прямо здесь. */
.ai-rows th,
.ai-rows td {
    vertical-align: top;
}

.ai-rows input[type="text"],
.ai-rows select {
    min-width: 120px;
    width: 100%;
    padding: 5px 8px;
    font-size: 13px;
}

.ai-rows .match-select {
    min-width: 180px;
}

.ai-rows .small {
    font-size: 12px;
    line-height: 1.35;
}

.ai-rows .req {
    color: var(--danger);
}

/* Липкая полоса действий внизу — кнопка не уезжает за длинной таблицей. */
.sticky-actions {
    position: sticky;
    bottom: 0;
    z-index: 5;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-top: 18px;
    padding: 14px 18px;
    border-top: 1px solid var(--border);
    border-radius: var(--radius) var(--radius) 0 0;
    background: var(--surface);
    box-shadow: var(--shadow);
}

/* Зона перетаскивания файла в модалке ИИ-импорта. */
.dropzone {
    display: block;
    padding: 26px 18px;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    background: var(--control-bg);
    text-align: center;
    cursor: pointer;
    transition: border-color 120ms ease, background 120ms ease;
}

.dropzone:hover,
.dropzone.is-over {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.dropzone__title {
    font-weight: 600;
}

.dropzone__hint {
    margin-top: 6px;
    color: var(--text-muted);
    font-size: 13px;
}

.dropzone__file {
    margin-top: 10px;
    font-weight: 600;
    color: var(--accent);
}

.dropzone input[type="file"] {
    display: none;
}

/* Выбор версии досье перед скачиванием. */
.variant-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--control-bg);
}

.variant-card p {
    max-width: 46ch;
}

/* Блок удаления цели: выделен, чтобы не нажать случайно. */
.danger-zone > summary {
    color: var(--danger);
    font-weight: 600;
}

.kpi-impact {
    margin-bottom: 14px;
    padding: 12px 14px;
    border-radius: var(--radius-control);
    background: var(--danger-bg);
    color: var(--text);
}

.kpi-impact p {
    margin: 0 0 6px;
}

.kpi-impact p:last-child {
    margin-bottom: 0;
}

/* Результат кнопки «Проверить ИИ» в Настройках. */
.ai-health {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: var(--radius-control);
    background: var(--control-bg);
    color: var(--text-muted);
}

.ai-health p {
    margin: 6px 0 0;
}

.ai-health__title {
    font-weight: 600;
}

.ai-health--ok {
    background: var(--ok-bg);
    color: var(--text);
}

.ai-health--ok .ai-health__title {
    color: var(--ok);
}

.ai-health--err {
    background: var(--danger-bg);
    color: var(--text);
}

.ai-health--err .ai-health__title {
    color: var(--danger);
}

.ai-panel__form {
    padding: 12px 18px 16px;
    border-top: 1px solid var(--border);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 10px;
}

.ai-panel__form textarea {
    min-height: 44px;
    resize: none;
}

.ai-result {
    max-height: 55vh;
    overflow-y: auto;
    padding: 16px;
    border-radius: var(--radius-control);
    background: var(--control-bg);
    font-size: 13.5px;
    line-height: 1.55;
    white-space: pre-wrap;
}

.risk-advice {
    margin: 0 20px 16px;
    padding: 14px 16px;
    border-radius: var(--radius-control);
    background: var(--accent-soft);
    font-size: 13px;
    line-height: 1.55;
    white-space: pre-wrap;
}

.risk-advice[hidden] {
    display: none;
}

/* Login and errors */

.auth-page,
.error-page {
    min-height: 100vh;
    padding: 24px;
    display: grid;
    place-items: center;
}

.login-box,
.auth-card,
.error-card {
    width: min(100%, 380px);
    margin: 0;
    padding: 28px;
    border: 0;
    border-radius: calc(var(--radius) + 2px);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.login-box h1,
.auth-card h1 {
    margin-bottom: 6px;
    font-size: 22px;
    font-weight: 600;
}

.login-box input[type="password"],
.auth-card input[type="password"] {
    width: 100%;
    margin: 6px 0 12px;
}

.login-box button,
.auth-card button {
    width: 100%;
}

.login-error {
    margin: -5px 0 12px;
    color: var(--danger);
    font-size: 12.5px;
}

.error-card {
    width: min(100%, 520px);
    text-align: center;
}

.error-code {
    margin-bottom: 10px;
    color: var(--accent);
    font-size: 44px;
    font-weight: 650;
    line-height: 1;
}

/* Responsive */

@media (max-width: 1060px) {
    .top__inner,
    header.top {
        gap: 10px;
    }

    .brand {
        margin-right: 4px;
    }

    .top nav a,
    .top__nav a {
        padding-right: 7px;
        padding-left: 7px;
    }

    .tiles,
    .kpi-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .split-layout {
        grid-template-columns: 1fr;
    }

    .manual-card {
        position: static;
    }

    .settings-layout {
        grid-template-columns: 1fr;
    }

    .settings-menu {
        position: static;
        grid-auto-flow: column;
        grid-auto-columns: max-content;
        overflow-x: auto;
        scrollbar-width: none;
    }

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

@media (max-width: 900px) {
    .cols,
    .grid--3,
    .grid--4,
    .overview-grid {
        grid-template-columns: 1fr;
    }

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

    .student-head__progress {
        width: 100%;
        min-width: 0;
    }

    .student-head__progress .chip-row {
        justify-content: flex-start;
    }
}

@media (max-width: 767px) {
    :root {
        --nav-height: 98px;
    }

    main,
    .page-shell {
        width: min(100% - 24px, 1280px);
        padding-top: 20px;
    }

    .top,
    header.top {
        min-height: 98px;
    }

    .top__inner,
    header.top {
        width: 100%;
        min-height: 98px;
        padding: 0;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-rows: 48px 49px;
        gap: 0;
    }

    .brand {
        padding: 0 12px;
    }

    .top__actions {
        padding-right: 12px;
    }

    .top nav,
    .top__nav {
        grid-column: 1 / -1;
        grid-row: 2;
        overflow-x: auto;
        border-top: 1px solid var(--border);
        padding: 0 5px;
        scrollbar-width: none;
    }

    .top nav::-webkit-scrollbar,
    .top__nav::-webkit-scrollbar {
        display: none;
    }

    .top nav a,
    .top__nav a {
        min-height: 49px;
        padding: 0 9px;
    }

    .top nav a.active::after,
    .top__nav a.active::after {
        right: 9px;
        left: 9px;
    }

    .top .spacer {
        display: none;
    }

    .page-header {
        align-items: flex-start;
    }

    .page-header__actions {
        width: 100%;
    }

    .toolbar {
        position: static;
        padding: 12px;
    }

    .toolbar > * {
        flex: 1 1 145px;
    }

    .toolbar .search-field,
    .toolbar .grow {
        flex-basis: 100%;
    }

    .toolbar .check {
        flex-basis: auto;
    }

    .card > h2,
    .card__header,
    .panel__header {
        padding-right: 16px;
        padding-left: 16px;
    }

    .card > .body,
    .card__body,
    .panel__body,
    .tile {
        padding-right: 16px;
        padding-left: 16px;
    }

    .student-sticky {
        top: var(--nav-height);
        margin-right: -12px;
        margin-left: -12px;
        padding-right: 12px;
        padding-left: 12px;
        border-radius: 0;
    }

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

    .risk-card__progress {
        width: 100%;
        max-width: none;
        flex: 0 0 auto;
    }

    .risk-list li {
        align-items: flex-start;
        padding-right: 16px;
        padding-left: 16px;
        flex-direction: column;
        gap: 6px;
    }

    .deadline-row {
        grid-template-columns: 1fr;
        align-items: start;
        gap: 5px;
    }

    .modal {
        padding: 8px;
    }

    .modal__dialog {
        max-height: calc(100vh - 16px);
    }

    .modal__header,
    .modal__body {
        padding-right: 16px;
        padding-left: 16px;
    }

    .map-row {
        grid-template-columns: 1fr 24px 1.2fr;
    }

    .map-table-head {
        display: none;
    }

    .map-row .sample {
        grid-column: 1 / -1;
    }

    .import-counts {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .donut-layout {
        grid-template-columns: 1fr;
        justify-items: center;
    }

    .chart-split {
        grid-template-columns: 1fr;
    }

    .grade-language-list {
        grid-template-columns: 1fr;
    }

    .chart-canvas-wrap--donut {
        height: 190px;
    }

    .ai-panel {
        right: 12px;
        left: 12px;
        bottom: 12px;
        width: auto;
        max-height: calc(100vh - 24px);
    }

    .ai-launcher {
        right: 12px;
        bottom: 12px;
    }

    .ai-launcher__label {
        display: none;
    }
}

@media (max-width: 560px) {
    .tiles,
    .kpi-grid,
    .grid,
    .grid--2,
    .checkbox-grid {
        grid-template-columns: 1fr;
    }

    .brand {
        font-size: 14px;
    }

    .top__actions .export-label {
        display: none;
    }

    .page-header__actions .btn {
        flex: 1 1 auto;
    }

    .steps {
        font-size: 10.5px;
    }

    .step__number {
        width: 27px;
        height: 27px;
    }

    .step:not(:last-child)::after {
        top: 13px;
    }

    .bar-row {
        grid-template-columns: 72px minmax(0, 1fr) 36px;
        gap: 8px;
    }
}