:root {
    --ink: #20201e;
    --muted: #73716c;
    --canvas: #f7f7f5;
    --surface: #fff;
    --line: #e8e7e3;
    --blue: #2378d4;
    --blue-soft: #eaf3fb;
    --green: #3d9368;
    --orange: #c86f2b;
    --orange-soft: #fff2e7;
    --navy: #182840;
    --shadow:
        0 1px 2px rgba(20, 20, 18, 0.04), 0 14px 40px rgba(20, 20, 18, 0.06);
    --radius: 12px;
}
* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    color: var(--ink);
    background: var(--canvas);
    font:
        15px/1.5 Arial,
        sans-serif;
}
button,
input,
select,
textarea {
    font: inherit;
}
button,
a {
    touch-action: manipulation;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid rgba(35, 120, 212, 0.25);
    outline-offset: 2px;
}
.hidden {
    display: none !important;
}
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}
button:disabled {
    cursor: wait;
    opacity: 0.65;
}
button:disabled:hover {
    transform: none;
}
.muted {
    color: var(--muted);
}
.eyebrow {
    display: block;
    margin-bottom: 8px;
    color: var(--blue);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.eyebrow.light {
    color: #9ec8f0;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-size: 17px;
    font-weight: 700;
    text-decoration: none;
}
.brand-light {
    color: #fff;
}
.brand-mark {
    display: grid;
    width: 32px;
    height: 32px;
    place-items: center;
    border-radius: 9px;
    background: var(--blue);
    color: #fff;
    font-weight: 800;
}
.button {
    min-height: 44px;
    padding: 0 18px;
    border: 1px solid transparent;
    border-radius: 9px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--ink);
    background: #fff;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: 0.18s ease;
}
.button:hover {
    transform: translateY(-1px);
}
.button.primary {
    background: var(--blue);
    color: #fff;
}
.button.secondary {
    border-color: var(--line);
    background: #fff;
}
.button.telegram {
    background: #eaf5fc;
    color: #1879b5;
}
.button.attention {
    background: var(--orange-soft);
    color: #9b4e16;
}
.button.wide {
    width: 100%;
}
.icon-button {
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 20px;
}
.icon-button:hover {
    background: #f0efec;
}
.auth-page {
    background: #fff;
}
.auth-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(360px, 1.05fr) minmax(420px, 0.95fr);
}
.auth-story {
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    padding: 42px 7vw;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: #fff;
    background: linear-gradient(145deg, #14233a 0%, #1e416d 60%, #2576bd 100%);
}
.auth-story:before,
.auth-story:after {
    content: "";
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}
.auth-story:before {
    width: 620px;
    height: 620px;
    right: -300px;
    top: 4%;
}
.auth-story:after {
    width: 430px;
    height: 430px;
    right: -170px;
    top: 22%;
    background: radial-gradient(
        circle at 35% 35%,
        rgba(101, 183, 255, 0.25),
        transparent 60%
    );
}
.story-copy {
    position: relative;
    z-index: 1;
    max-width: 630px;
}
.story-copy h1 {
    margin: 0 0 22px;
    font-size: clamp(44px, 5.4vw, 78px);
    line-height: 1.01;
    letter-spacing: -0.045em;
}
.story-copy p {
    max-width: 530px;
    margin: 0;
    color: rgba(255, 255, 255, 0.75);
    font-size: 18px;
}
.story-proof {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 13px;
}
.proof-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #67d89a;
    box-shadow: 0 0 0 5px rgba(103, 216, 154, 0.12);
}
.auth-panel {
    display: grid;
    place-items: center;
    padding: 48px;
}
.auth-card {
    width: min(420px, 100%);
}
.mobile-brand {
    display: none;
}
.auth-card h2 {
    margin: 0;
    font-size: 34px;
    letter-spacing: -0.03em;
}
.auth-card > .muted {
    margin: 8px 0 28px;
}
.tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: 4px;
    margin-bottom: 22px;
    border-radius: 10px;
    background: #f0efec;
}
.tab {
    min-height: 40px;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: var(--muted);
    font-weight: 700;
    cursor: pointer;
}
.tab.active {
    background: #fff;
    color: var(--ink);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}
.auth-form {
    display: grid;
    gap: 14px;
}
.auth-form fieldset {
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
}
.role-options legend {
    margin-bottom: 6px;
    font-size: 21px;
    font-weight: 700;
    line-height: 1.3;
}
.role-intro {
    margin: 0 0 16px;
    color: #625f5a;
    font-size: 13px;
}
.auth-form .role-option {
    display: flex;
    align-items: start;
    gap: 12px;
    margin-top: 10px;
    padding: 18px;
    border: 1px solid #dcdad5;
    border-radius: var(--radius);
    cursor: pointer;
    transition: border-color 0.18s ease, background 0.18s ease;
}
.role-option:hover {
    border-color: var(--blue);
}
.role-option:has(input:checked) {
    border-color: var(--blue);
    background: var(--blue-soft);
    box-shadow: inset 0 0 0 1px var(--blue);
}
.role-option:has(input:focus-visible) {
    outline: 3px solid var(--blue);
    outline-offset: 3px;
}
.auth-form .role-option input {
    flex: 0 0 18px;
    width: 18px;
    height: 18px;
    margin: 3px 0 0;
    accent-color: var(--blue);
}
.role-option span {
    display: grid;
    gap: 5px;
}
.role-option b {
    color: var(--ink);
    font-size: 16px;
}
.role-option small {
    color: #625f5a;
    font-size: 13px;
    font-weight: 400;
    line-height: 1.5;
}
.selected-role {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    color: #625f5a;
    font-size: 13px;
}
.selected-role b {
    color: var(--ink);
}
.text-button {
    min-height: 44px;
    padding: 0 10px;
    border: 0;
    border-radius: 8px;
    background: var(--blue-soft);
    color: #175ca6;
    font-weight: 700;
    cursor: pointer;
}
.auth-form label {
    display: grid;
    gap: 7px;
    color: #44423e;
    font-size: 13px;
    font-weight: 700;
}
.auth-form input {
    width: 100%;
    height: 48px;
    padding: 0 14px;
    border: 1px solid #dcdad5;
    border-radius: 9px;
    background: #fff;
}
.auth-form input:focus {
    border-color: var(--blue);
}
.telegram-step {
    display: flex;
    gap: 12px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fafaf8;
}
.step-index {
    display: grid;
    flex: 0 0 28px;
    height: 28px;
    place-items: center;
    border-radius: 50%;
    background: var(--blue);
    color: #fff;
    font-weight: 700;
}
.telegram-step b {
    font-size: 13px;
}
.telegram-step p {
    margin: 2px 0 0;
    color: var(--muted);
    font-size: 12px;
}
.status {
    min-height: 24px;
    margin-top: 14px;
    font-size: 13px;
}
.status.error {
    color: #bd4439;
}
.status.success {
    color: var(--green);
}
.fineprint {
    margin: 22px 0 0;
    color: #99958e;
    font-size: 11px;
    text-align: center;
}
.topbar {
    position: sticky;
    z-index: 20;
    top: 0;
    height: 72px;
    padding: 0 28px;
    display: grid;
    grid-template-columns: 280px 1fr auto;
    align-items: center;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
}
.topbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
}
#toggle-sidebar {
    flex-shrink: 0;
    font-size: 18px;
}
.course-title {
    display: flex;
    gap: 10px;
    align-items: center;
}
.course-title span {
    color: var(--muted);
}
.profile-menu {
    display: flex;
    align-items: center;
    gap: 10px;
}
.avatar {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    overflow: hidden;
    border-radius: 10px;
    background: var(--blue-soft);
    color: var(--blue);
    font-weight: 800;
}
.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.profile-copy {
    display: grid;
    min-width: 130px;
    font-size: 12px;
}
.profile-copy span {
    color: var(--muted);
}
.workspace {
    max-width: 1600px;
    min-height: calc(100vh - 72px);
    margin: auto;
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    transition: grid-template-columns 0.25s ease;
}
.workspace.sidebar-collapsed {
    grid-template-columns: 0px minmax(0, 1fr);
}
.sidebar {
    position: sticky;
    top: 72px;
    height: calc(100vh - 72px);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-right: 1px solid var(--line);
    background: #fbfbf9;
    transition:
        padding 0.2s ease,
        opacity 0.2s ease;
}
.workspace.sidebar-collapsed .sidebar {
    padding: 30px 0;
    border-right: 0;
    opacity: 0;
    pointer-events: none;
}
.sidebar-heading {
    display: grid;
    padding: 0 10px 18px;
}
.progress-track {
    height: 4px;
    margin: 0 10px 26px;
    overflow: hidden;
    border-radius: 4px;
    background: #e8e7e3;
}
.progress-track span {
    display: block;
    height: 100%;
    background: var(--blue);
}
.lesson-list {
    display: grid;
    align-content: start;
    gap: 6px;
    /* Список уроков прокручивается сам, заголовок и «Кеңес» остаются на месте. */
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    margin-right: -8px;
    padding-right: 8px;
}
.lesson-item {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 12px 10px;
    border-radius: 10px;
    color: var(--ink);
    text-decoration: none;
}
.lesson-item:hover {
    background: #f1f0ed;
}
.lesson-item.active {
    background: var(--blue-soft);
}
.lesson-item.locked {
    pointer-events: none;
    opacity: 0.48;
}
.lesson-number {
    display: grid;
    flex: 0 0 32px;
    height: 32px;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 9px;
    background: #fff;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
}
.lesson-item.active .lesson-number {
    border-color: var(--blue);
    background: var(--blue);
    color: #fff;
}
.lesson-item span:last-child {
    display: grid;
    line-height: 1.3;
}
.lesson-item small {
    color: var(--muted);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.lesson-item b {
    margin-top: 3px;
    font-size: 13px;
}
.sidebar-note {
    flex: none;
    margin-top: 16px;
    display: flex;
    gap: 10px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
}
.sidebar-note > span {
    color: var(--blue);
}
.sidebar-note p {
    display: grid;
    margin: 0;
    color: var(--muted);
    font-size: 12px;
}
.sidebar-note b {
    color: var(--ink);
}
.lesson-area {
    min-width: 0;
    padding: 34px clamp(24px, 4vw, 60px) 60px;
}
.lesson-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 24px;
}
.lesson-head h1 {
    margin: 0;
    font-size: clamp(27px, 3vw, 38px);
    line-height: 1.15;
    letter-spacing: -0.035em;
}
.lesson-state {
    padding: 7px 10px;
    border-radius: 7px;
    background: #efeee9;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
}
.lesson-state.passed {
    background: #e9f4ed;
    color: var(--green);
}
.learning-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.65fr) minmax(330px, 0.75fr);
    gap: 18px;
    align-items: stretch;
}
.video-card,
.assistant-card,
.completion-card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}
.video-card {
    overflow: hidden;
}
.video-frame {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #111;
}
.video-frame iframe,
#player {
    width: 100%;
    height: 100%;
}
.video-loader {
    position: absolute;
    inset: 0;
    display: grid;
    place-content: center;
    gap: 10px;
    color: #bcbcbc;
    text-align: center;
    background: #111;
}
.video-loader span {
    width: 28px;
    height: 28px;
    margin: auto;
    border: 2px solid #555;
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
.video-loader p {
    margin: 0;
    font-size: 12px;
}
.video-meta {
    min-height: 76px;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
}
.video-meta > div {
    display: grid;
}
.video-meta b {
    font-size: 18px;
    font-variant-numeric: tabular-nums;
}
.video-meta span {
    color: var(--muted);
    font-size: 11px;
}
.assistant-card {
    min-height: 420px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.assistant-head {
    height: 72px;
    padding: 0 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--line);
}
.ai-avatar {
    display: grid;
    width: 36px;
    height: 36px;
    place-items: center;
    border-radius: 10px;
    background: var(--navy);
    color: #fff;
}
.assistant-head > div:nth-child(2) {
    display: grid;
    flex: 1;
}
.assistant-head span {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--muted);
    font-size: 10px;
}
.assistant-head i {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #52ac79;
}
.chat-box {
    flex: 1;
    min-height: 0;
    padding: 18px;
    overflow-y: auto;
    background: #fbfbfa;
}
.message {
    max-width: 88%;
    margin-bottom: 12px;
    padding: 12px 14px;
    border-radius: 10px;
    background: #fff;
    border: 1px solid var(--line);
}
.message.user {
    margin-left: auto;
    background: var(--blue);
    border-color: var(--blue);
    color: #fff;
}
.message.error {
    color: #b84338;
    background: #fff1ef;
}
.message p {
    margin: 3px 0 0;
    white-space: pre-wrap;
}
.message-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0.6;
}
.suggestion {
    width: 100%;
    min-height: 44px;
    margin-top: 8px;
    padding: 0 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid var(--line);
    border-radius: 9px;
    background: #fff;
    color: #55524d;
    cursor: pointer;
    text-align: left;
}
.suggestion:hover {
    border-color: #b9d5ee;
}
.composer {
    margin: 12px;
    border: 1px solid #d9d8d3;
    border-radius: 10px;
    background: #fff;
}
.composer:focus-within {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(35, 120, 212, 0.1);
}
.composer textarea {
    width: 100%;
    max-height: 120px;
    padding: 12px 12px 4px;
    resize: none;
    border: 0;
    outline: 0;
    background: transparent;
}
.composer-foot {
    padding: 4px 6px 6px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--muted);
    font-size: 10px;
}
.send-button {
    width: 36px;
    height: 36px;
    border: 0;
    border-radius: 8px;
    background: var(--blue);
    color: #fff;
    cursor: pointer;
    font-size: 20px;
}
.completion-card {
    margin-top: 18px;
    padding: 26px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.completion-card h2 {
    margin: 0;
    font-size: 23px;
}
.completion-card p {
    max-width: 620px;
    margin: 6px 0 0;
    color: var(--muted);
}
.modal {
    position: fixed;
    z-index: 100;
    inset: 0;
    padding: 24px;
    display: grid;
    place-items: center;
    background: rgba(15, 18, 22, 0.6);
    backdrop-filter: blur(6px);
}
.modal-card {
    width: min(720px, 100%);
    max-height: 90vh;
    overflow: auto;
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 30px 100px rgba(0, 0, 0, 0.25);
}
.modal-head {
    position: sticky;
    z-index: 2;
    top: 0;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    background: #fff;
}
.modal-head h2 {
    margin: 0;
}
.test-content {
    padding: 24px;
}
.loading-state {
    padding: 56px 20px;
    color: var(--muted);
    text-align: center;
}
.question-card {
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
}
.question-card h3 {
    margin: 0 0 14px;
    font-size: 16px;
}
.option {
    margin: 8px 0;
    padding: 11px 12px;
    display: flex;
    gap: 10px;
    border: 1px solid var(--line);
    border-radius: 9px;
    cursor: pointer;
}
.option:hover {
    background: #fafaf8;
}
.option input {
    accent-color: var(--blue);
}
.test-actions {
    padding-top: 22px;
    display: flex;
    justify-content: flex-end;
}
.result-score {
    padding: 26px;
    border-radius: 12px;
    background: var(--blue-soft);
    text-align: center;
}
.result-score strong {
    display: block;
    color: var(--blue);
    font-size: 48px;
}
.result-score.passed {
    background: #e9f4ed;
}
.result-score.passed strong {
    color: var(--green);
}
.review-item {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}
.review-item a {
    color: var(--blue);
    font-weight: 700;
}
.review-item p {
    margin: 4px 0;
    color: var(--muted);
}
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}
.materials-card {
    margin-top: 24px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}
.materials-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.materials-heading h2 {
    margin: 0;
    font-size: 23px;
    letter-spacing: -0.02em;
}
.materials-heading p,
.upload-heading p {
    margin: 6px 0 0;
    color: #625f5a;
    font-size: 13px;
}
.material-count {
    flex-shrink: 0;
    padding: 6px 11px;
    border-radius: 8px;
    background: var(--blue-soft);
    color: #175ca6;
    font-size: 12px;
    font-weight: 700;
}
.materials-status {
    margin: 18px 0 0;
    color: #625f5a;
    font-size: 14px;
}
.materials-status:empty {
    display: none;
}
.materials-status.error,
.material-item-status.error {
    color: #a3382e;
}
#retry-materials {
    margin-top: 12px;
}
.materials-list {
    display: grid;
    gap: 22px;
    margin-top: 24px;
}
.materials-list:empty {
    margin-top: 0;
}
.material-group {
    display: grid;
    gap: 8px;
}
.material-group h3,
.upload-heading h3 {
    margin: 0 0 4px;
    font-size: 15px;
}
.material-item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 8px 14px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 10px;
}
.material-filetype {
    display: grid;
    width: 44px;
    height: 50px;
    place-items: center;
    border: 1px solid #d3e3f1;
    border-radius: 8px;
    background: var(--blue-soft);
    color: #175ca6;
    font-size: 10px;
    font-weight: 700;
}
.material-copy {
    min-width: 0;
}
.material-copy h4 {
    margin: 0;
    font-size: 14px;
    overflow-wrap: anywhere;
}
.material-copy p {
    margin: 3px 0 0;
    color: #625f5a;
    font-size: 12px;
    overflow-wrap: anywhere;
}
.material-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.material-actions .button {
    padding: 0 12px;
    font-size: 12px;
}
.material-item-status {
    grid-column: 2 / -1;
    margin: 0;
    color: #2c704d;
    font-size: 12px;
}
.material-item-status:empty {
    display: none;
}
.button.danger-quiet {
    color: #a3382e;
    background: #fff2f0;
}
.button.danger {
    background: #a3382e;
    color: #fff;
}
.delete-confirmation {
    grid-column: 1 / -1;
    padding: 14px;
    border: 1px solid #eed0cb;
    border-radius: 8px;
    background: #fff8f7;
}
.delete-confirmation p {
    margin: 0 0 12px;
    font-size: 13px;
    overflow-wrap: anywhere;
}
.materials-empty {
    padding: 26px 20px;
    border: 1px dashed #dcdad5;
    border-radius: 10px;
    background: var(--canvas);
    text-align: center;
}
.materials-empty b {
    font-size: 14px;
}
.materials-empty p {
    max-width: 520px;
    margin: 6px auto 0;
    color: #625f5a;
    font-size: 13px;
}
.material-upload {
    margin-top: 24px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
}
.upload-fields {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(180px, 0.65fr);
    gap: 14px;
    min-width: 0;
    margin: 18px 0 0;
    padding: 0;
    border: 0;
}
.upload-fields label {
    display: grid;
    min-width: 0;
    gap: 7px;
    color: #44423e;
    font-size: 13px;
    font-weight: 700;
}
.upload-fields input,
.upload-fields select {
    width: 100%;
    min-width: 0;
    min-height: 46px;
    padding: 10px 12px;
    border: 1px solid #dcdad5;
    border-radius: 8px;
    color: var(--ink);
    background: var(--surface);
}
.upload-fields input[type="file"] {
    padding: 8px;
    font-size: 12px;
}
.upload-fields input::file-selector-button {
    min-height: 30px;
    margin-right: 12px;
    border: 0;
    border-radius: 5px;
    color: #175ca6;
    background: var(--blue-soft);
    cursor: pointer;
}
.upload-file,
.upload-hint {
    grid-column: 1 / -1;
}
.upload-hint {
    margin: -6px 0 0;
    color: #625f5a;
    font-size: 12px;
}
#upload-material {
    justify-self: start;
}
.material-upload .status:empty {
    min-height: 0;
    margin: 0;
}
@media (max-width: 1100px) {
    .workspace {
        grid-template-columns: 220px minmax(0, 1fr);
    }
    .topbar {
        grid-template-columns: 220px 1fr auto;
    }
    .learning-grid {
        grid-template-columns: 1fr;
    }
    .sidebar {
        padding-inline: 12px;
    }
}
@media (max-width: 760px) {
    .auth-shell {
        display: block;
    }
    .auth-story {
        display: none;
    }
    .auth-panel {
        min-height: 100vh;
        padding: 28px 20px;
    }
    .mobile-brand {
        margin-bottom: 48px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .topbar {
        height: 64px;
        padding: 0 16px;
        grid-template-columns: 1fr auto;
    }
    .course-title,
    .profile-copy {
        display: none;
    }
    .workspace {
        display: block;
    }
    .sidebar {
        position: static;
        width: 100%;
        height: auto;
        max-height: 200px;
        padding: 14px 16px;
        border-right: 0;
        border-bottom: 1px solid var(--line);
        overflow-x: auto;
        transition:
            max-height 0.2s ease,
            padding 0.2s ease,
            opacity 0.2s ease;
    }
    .workspace.sidebar-collapsed .sidebar {
        max-height: 0;
        padding: 0 16px;
        border-bottom: 0;
        opacity: 0;
        pointer-events: none;
    }
    .sidebar-heading,
    .progress-track,
    .sidebar-note {
        display: none;
    }
    .lesson-list {
        display: flex;
        overflow-x: auto;
        overflow-y: hidden;
    }
    .lesson-item {
        min-width: 200px;
    }
    .lesson-area {
        padding: 24px 16px 48px;
    }
    .lesson-head {
        align-items: start;
    }
    .lesson-state {
        display: none;
    }
    .learning-grid {
        gap: 14px;
    }
    .video-meta {
        align-items: stretch;
        gap: 12px;
        flex-direction: column;
    }
    .video-meta .button {
        width: 100%;
    }
    .assistant-card {
        height: min(65vh, 560px);
    }
    .completion-card {
        align-items: stretch;
        flex-direction: column;
        padding: 22px;
    }
    .materials-card {
        padding: 20px 16px;
    }
    .materials-heading {
        align-items: start;
        flex-direction: column;
        gap: 12px;
    }
    .material-item {
        grid-template-columns: auto minmax(0, 1fr);
        gap: 12px;
        padding: 12px;
    }
    .material-item > .material-actions {
        grid-column: 1 / -1;
    }
    .material-item > .material-actions .button:first-child {
        flex: 1;
    }
    .material-item-status {
        grid-column: 1 / -1;
    }
    .upload-fields {
        grid-template-columns: minmax(0, 1fr);
    }
    #upload-material {
        justify-self: stretch;
    }
    .modal {
        padding: 0;
        align-items: end;
    }
    .modal-card {
        width: 100%;
        max-height: 94vh;
        border-radius: 16px 16px 0 0;
    }
}
@media (prefers-reduced-motion: reduce) {
    * {
        scroll-behavior: auto !important;
        transition: none !important;
        animation-duration: 0.01ms !important;
    }
}
.message p ul,
.message p ol {
    margin: 6px 0 6px 20px;
    padding: 0;
}
.message p li {
    margin-bottom: 4px;
}