:root {
  --bg: #eef2f7;
  --bg-deep: #e4ebf5;
  --panel: #ffffff;
  --panel-soft: #f7f9fc;
  --panel-strong: #101828;
  --text: #172033;
  --muted: rgba(23, 32, 51, 0.66);
  --line: rgba(15, 23, 42, 0.1);
  --line-strong: rgba(15, 23, 42, 0.16);
  --accent: #2f6fed;
  --accent-dark: #1f57c2;
  --accent-soft: rgba(47, 111, 237, 0.1);
  --success: #0f8c4f;
  --danger: #c0392b;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.06);
  --radius: 18px;
  --radius-lg: 24px;
  --mobile-nav-offset: 148px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100dvh;
  background:
    radial-gradient(circle at top left, rgba(47, 111, 237, 0.12), transparent 28rem),
    linear-gradient(180deg, #f7f9fd 0%, #eef2f7 42%, #edf1f7 100%);
  color: var(--text);
  font: 16px/1.5 "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

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

p {
  margin: 0;
}

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

.auth-shell {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card,
.section,
.admin-card,
.learn-sidebar {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.auth-card {
  width: 100%;
  max-width: 430px;
  padding: 28px;
}

.auth-card--wide {
  max-width: 440px;
}

.brand {
  margin-bottom: 20px;
  text-align: center;
}

.brand-logo-wrap {
  display: grid;
  width: 72px;
  height: 72px;
  margin: 0 auto 14px;
  overflow: hidden;
  border-radius: 22px;
}

.brand-logo {
  display: block;
  width: 72px;
  height: 72px;
  object-fit: cover;
}

.brand-mark {
  width: 72px;
  height: 72px;
  margin: 0 auto 14px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(145deg, #0b4aa0, #1e66c6);
}

.brand h1,
.section h2,
.section h3 {
  margin: 0;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

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

.stack,
form {
  display: grid;
  gap: 12px;
}

.row {
  display: grid;
  gap: 12px;
}

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

label {
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

input,
textarea,
select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  outline: none;
  background: #fff;
  color: var(--text);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  border-color: rgba(47, 111, 237, 0.45);
  box-shadow: 0 0 0 4px rgba(47, 111, 237, 0.12);
}

button,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 11px 16px;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

button.secondary,
.button-link.secondary {
  background: #e8eefb;
  color: var(--accent-dark);
}

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

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

.button-small {
  min-height: 34px;
  padding: 7px 12px;
  font-size: 13px;
  border-radius: 10px;
}

.notice {
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 14px;
}

.notice.error {
  background: #ffe8e5;
  color: #8e2317;
}

.notice.success {
  background: #e6f8ee;
  color: #0f6a3f;
}

.learn-layout {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
  padding: 18px;
}

.learn-sidebar {
  position: sticky;
  top: 18px;
  align-self: start;
  min-height: calc(100dvh - 36px);
  padding: 18px 16px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 22px;
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.learn-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border-radius: 16px;
  color: var(--text);
}

.learn-brand__media {
  display: grid;
  width: 42px;
  height: 42px;
  overflow: hidden;
  border-radius: 14px;
  flex-shrink: 0;
}

.learn-brand__logo {
  display: block;
  width: 42px;
  height: 42px;
  object-fit: cover;
}

.learn-brand__mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #7aa8ff);
  color: #fff;
  font-weight: 700;
}

.learn-brand__text {
  display: grid;
  line-height: 1.2;
}

.learn-brand__text span {
  font-size: 13px;
  color: var(--muted);
}

.learn-sidebar__nav {
  display: grid;
  gap: 8px;
  align-content: start;
}

.learn-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  color: var(--text);
  font-weight: 600;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.learn-nav-link:hover {
  background: var(--panel-soft);
  transform: translateX(2px);
}

.learn-nav-link.is-active {
  background: linear-gradient(135deg, rgba(47, 111, 237, 0.12), rgba(47, 111, 237, 0.04));
  color: var(--accent-dark);
  box-shadow: inset 0 0 0 1px rgba(47, 111, 237, 0.14);
}

.learn-nav-link__icon {
  width: 24px;
  text-align: center;
  font-size: 18px;
  line-height: 1;
}

.learn-user-card {
  display: grid;
  gap: 2px;
  padding: 14px;
  border-radius: 16px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.learn-user-card span {
  color: var(--muted);
  font-size: 14px;
}

.learn-sidebar__footer {
  display: block;
}

.learn-sidebar__logout {
  gap: 0;
  margin-top: 10px;
}

.learn-sidebar__logout button {
  width: auto;
  justify-self: start;
}

.learn-main {
  min-width: 0;
  display: grid;
  gap: 18px;
}

.app-shell {
  min-height: 100%;
  padding-bottom: 112px;
}

.app-shell::after {
  content: "";
  display: block;
  height: 0;
}

.page {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 0 4px 28px;
}

.page--app {
  width: 100%;
}

.page-notice {
  margin-bottom: 16px;
}

.topbar-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 14px;
}

.dashboard-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1.1fr 0.9fr;
}

.stats-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 18px;
}

.stat-card,
.quick-link-card {
  display: grid;
  gap: 6px;
  padding: 18px;
  border-radius: 18px;
  background: #fff;
  color: var(--text);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.stat-card__value {
  font-size: 32px;
  line-height: 1;
  font-weight: 700;
  color: var(--accent);
}

.stat-card__label {
  font-size: 14px;
  color: var(--muted);
}

.quick-links {
  display: grid;
  gap: 14px;
}

.dashboard-main,
.dashboard-side,
.admin-stack {
  display: grid;
  gap: 18px;
}

.section {
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.75);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.items {
  display: grid;
  gap: 12px;
}

.item {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.item--soft {
  background: var(--panel-soft);
}

.item-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.badge.done {
  background: rgba(15, 140, 79, 0.12);
  color: var(--success);
}

.helper {
  font-size: 13px;
  color: var(--muted);
}

.empty {
  padding: 16px;
  border: 1px dashed var(--line-strong);
  border-radius: 14px;
  color: var(--muted);
  background: var(--panel-soft);
}

.article-meta,
.source-list {
  font-size: 14px;
  color: var(--muted);
}

.chat-answer {
  white-space: pre-wrap;
  padding: 14px;
  border-radius: 14px;
  background: #f6f9ff;
  border: 1px solid rgba(47, 111, 237, 0.12);
}

.compact-items .item {
  padding: 12px 14px;
}

.onboarding-list-card {
  display: grid;
  gap: 12px;
}

.onboarding-progress-card {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
}

.onboarding-progress-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.progress-bar {
  height: 10px;
  border-radius: 999px;
  background: rgba(47, 111, 237, 0.12);
  overflow: hidden;
}

.progress-bar__value {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #2f6fed 0%, #5fa8ff 100%);
  transition: width 0.25s ease;
}

.onboarding-list-card__actions {
  display: flex;
  justify-content: flex-start;
}

.onboarding-day-card {
  display: grid;
  gap: 14px;
}

.onboarding-read-sentinel {
  width: 100%;
  height: 1px;
}

.onboarding-day-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.onboarding-day-actions form {
  display: block;
}

.admin-card {
  display: grid;
  gap: 14px;
  padding: 18px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid rgba(255, 255, 255, 0.75);
}

.admin-card h3 {
  margin: 0;
}

.filter-form {
  margin-bottom: 12px;
}

.modal-form {
  display: grid;
  gap: 16px;
}

.page-knowledge .knowledge-list {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
}

.page-knowledge .knowledge-list .empty {
  grid-column: 1 / -1;
}

.page-knowledge .knowledge-article-card {
  display: grid;
  gap: 10px;
  align-content: start;
  min-height: 180px;
  padding: 14px;
}

.page-knowledge .knowledge-article-card .item-title {
  display: grid;
  gap: 8px;
  align-items: start;
  justify-content: stretch;
  margin-bottom: 0;
}

.page-knowledge .knowledge-article-card .item-title strong {
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.page-knowledge .knowledge-article-card .badge {
  width: fit-content;
  max-width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
}

.page-knowledge .knowledge-article-card__actions {
  display: flex;
  justify-content: flex-start;
  align-self: end;
}

.page-knowledge .knowledge-article-card__actions .button-link {
  min-height: 40px;
  padding: 9px 14px;
  border-radius: 10px;
}

.dashboard-article-card {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.dashboard-article-card__header,
.dashboard-article-card__footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.dashboard-article-card__title {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
}

.dashboard-article-card__preview {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.dashboard-article-card__footer {
  align-items: center;
}

.dashboard-article-card__link {
  flex-shrink: 0;
}

.page-assistant .learn-sidebar {
  display: grid;
}

.page-assistant .learn-layout {
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
  padding: 18px;
}

.page-assistant .learn-main {
  gap: 18px;
}

.page-assistant .app-shell {
  min-height: calc(100dvh - 36px);
}

.assistant-panel {
  width: 100%;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 18px;
}

.assistant-history,
.assistant-chat {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.assistant-history-toggle,
.assistant-history-backdrop,
.assistant-history__close,
.assistant-chat__mobile-topbar {
  display: none;
}

.assistant-history {
  align-self: start;
  padding: 18px 16px;
  display: grid;
  gap: 14px;
}

.assistant-history__head h2 {
  margin: 0;
}

.assistant-history__head {
  position: relative;
}

.assistant-history__new {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 12px;
  background: rgba(47, 111, 237, 0.08);
  color: var(--accent-dark);
  font-weight: 600;
}

.assistant-history__list {
  display: grid;
  gap: 10px;
}

.assistant-history__item {
  display: grid;
  gap: 4px;
  padding: 12px;
  border-radius: 14px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.assistant-history__item span,
.assistant-history__empty {
  color: var(--muted);
  font-size: 14px;
}

.assistant-history__item.is-active {
  border-color: rgba(47, 111, 237, 0.18);
  background: linear-gradient(135deg, rgba(47, 111, 237, 0.08), rgba(47, 111, 237, 0.03));
}

.assistant-chat {
  min-width: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: 18px;
  min-height: calc(100dvh - 72px);
}

.assistant-chat__thread {
  display: grid;
  align-content: start;
  gap: 18px;
  padding: 12px 6px 18px;
  min-height: 0;
  overflow-y: auto;
}

.assistant-chat__empty {
  min-height: 420px;
  align-self: center;
  text-align: center;
  display: grid;
  place-items: center;
}

.assistant-chat__empty h1 {
  margin: 0;
  font-size: clamp(30px, 3.6vw, 48px);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: #132035;
}

.assistant-chat__message {
  display: flex;
  align-items: flex-start;
}

.assistant-chat__message--user {
  justify-content: flex-end;
}

.assistant-chat__bubble {
  display: inline-block;
  max-width: min(760px, 100%);
  line-height: 1.65;
}

.assistant-chat__formatted {
  display: flex;
  flex-direction: column;
  gap: 8px;
  white-space: normal;
}

.assistant-chat__formatted p {
  margin: 0;
}

.assistant-chat__bubble--bot .assistant-chat__formatted strong {
  font-weight: 700;
  color: #132035;
}

.assistant-chat__bubble--user {
  width: fit-content;
  max-width: min(560px, 82%);
  padding: 11px 16px;
  border-radius: 24px;
  background: linear-gradient(135deg, #2f6fed, #528fff);
  color: #fff;
  box-shadow: 0 10px 24px rgba(47, 111, 237, 0.16);
  line-height: 1.45;
}

.assistant-chat__bubble--bot {
  padding: 2px 0;
  color: var(--text);
  font-size: 16px;
}

.assistant-chat__actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}

.assistant-chat__action {
  min-height: 28px;
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(23, 32, 51, 0.05);
  color: var(--muted);
  box-shadow: none;
  font-size: 12px;
  font-weight: 600;
}

.assistant-chat__action:hover,
.assistant-chat__action:focus-visible {
  background: rgba(47, 111, 237, 0.1);
  color: var(--accent-dark);
}

.assistant-chat__action:disabled {
  cursor: wait;
  opacity: 0.55;
}

.assistant-chat__message--pending {
  opacity: 0.72;
}

.assistant-chat__typing {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 28px;
  padding: 2px 0;
}

.assistant-chat__typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--muted);
  animation: assistantTyping 1.2s ease-in-out infinite;
}

.assistant-chat__typing-dot:nth-child(2) {
  animation-delay: 0.16s;
}

.assistant-chat__typing-dot:nth-child(3) {
  animation-delay: 0.32s;
}

@keyframes assistantTyping {
  0%,
  80%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }

  40% {
    opacity: 0.95;
    transform: translateY(-2px);
  }
}

.assistant-chat__kb-link {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.assistant-chat__sources {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.assistant-chat__source {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(47, 111, 237, 0.08);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 600;
}

.assistant-chat__composer-wrap {
  padding-top: 6px;
}

.assistant-chat__composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  padding: 10px 10px 10px 14px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(23, 32, 51, 0.08);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
}

.assistant-chat__submit {
  width: 38px;
  height: 38px;
  min-height: 38px;
  padding: 0;
  border-radius: 50%;
  background: #aeb6c5;
  color: #fff;
}

.assistant-chat__input {
  gap: 0;
}

.assistant-chat__input textarea {
  min-height: 28px;
  max-height: 180px;
  padding: 6px 2px;
  border: 0;
  background: transparent;
  box-shadow: none;
  resize: none;
}

.assistant-chat__input textarea:focus {
  border: 0;
  box-shadow: none;
}

.assistant-chat__hint {
  margin: 8px 0 0;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

.assistant-chat__composer.is-loading {
  opacity: 0.92;
}

.assistant-chat__submit[disabled],
.assistant-chat__input textarea:disabled {
  cursor: wait;
  opacity: 0.7;
}

.assistant-chat__error {
  margin-bottom: 12px;
}

.modal-shell {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: 24px;
}

.modal-shell[hidden] {
  display: none !important;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(9, 14, 26, 0.56);
  backdrop-filter: blur(8px);
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(900px, 100%);
  max-height: min(88dvh, 960px);
  overflow: auto;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 24px;
  background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
  box-shadow: 0 28px 80px rgba(15, 23, 42, 0.22);
}

.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.modal-close {
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border-radius: 14px;
  font-size: 28px;
  line-height: 1;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.onboarding-create-trigger {
  flex-shrink: 0;
}

.onboarding-editor-card {
  display: grid;
  gap: 16px;
}

.onboarding-editor-form {
  gap: 16px;
}

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel-soft);
}

.editor-toolbar button {
  min-height: 38px;
  padding: 8px 12px;
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  font-weight: 600;
  box-shadow: none;
}

.editor-dropzone {
  padding: 10px;
  border: 1px dashed rgba(47, 111, 237, 0.3);
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(47, 111, 237, 0.04), rgba(47, 111, 237, 0.01));
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.editor-dropzone.is-dragover {
  border-color: rgba(47, 111, 237, 0.7);
  background: rgba(47, 111, 237, 0.08);
}

.rich-editor {
  min-height: 320px;
  padding: 18px;
  border-radius: 16px;
  background: #fff;
  outline: none;
  box-shadow: inset 0 0 0 1px rgba(47, 111, 237, 0.08);
}

.rich-editor:empty::before {
  content: attr(data-placeholder);
  color: var(--muted);
}

.rich-editor table,
.rich-content table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  margin: 8px 0;
  border: 1px solid rgba(15, 23, 42, 0.14);
  border-radius: 14px;
  background: #fff;
}

.rich-editor caption,
.rich-content caption {
  padding: 12px 14px 8px;
  font-weight: 700;
  text-align: center;
  color: var(--text);
}

.rich-editor th,
.rich-editor td,
.rich-content th,
.rich-content td {
  padding: 12px 14px;
  vertical-align: top;
  border: 1px solid rgba(15, 23, 42, 0.12);
}

.rich-editor th,
.rich-content th {
  font-weight: 700;
  background: rgba(47, 111, 237, 0.06);
}

.rich-table-scroll {
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

.rich-table-scroll table {
  width: max-content;
  min-width: 100%;
}

.editor-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.editor-status {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
  background: var(--panel-soft);
}

.editor-status[data-tone="success"] {
  color: #0f6a3f;
  background: #e6f8ee;
}

.editor-status[data-tone="warning"] {
  color: #8a5a00;
  background: #fff2d9;
}

.editor-status[data-tone="danger"] {
  color: #8e2317;
  background: #ffe8e5;
}

.rich-content {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.rich-content > * {
  min-width: 0;
}

.rich-content > :first-child {
  margin-top: 0;
}

.rich-content > :last-child {
  margin-bottom: 0;
}

.rich-content h2,
.rich-content h3,
.rich-content p,
.rich-content ul,
.rich-content ol,
.rich-content blockquote,
.rich-content pre,
.rich-content figure {
  margin: 0;
}

.rich-content ul,
.rich-content ol {
  padding-left: 20px;
}

.rich-content blockquote {
  padding: 14px 16px;
  border-left: 4px solid rgba(47, 111, 237, 0.5);
  border-radius: 0 14px 14px 0;
  background: rgba(47, 111, 237, 0.06);
  color: var(--muted);
}

.rich-content figure {
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 16px;
  background: var(--panel-soft);
}

.rich-attachment {
  position: relative;
  display: inline-block;
  width: fit-content;
  max-width: 100%;
}

.rich-attachment__expand {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  width: 40px;
  min-height: 40px;
  padding: 0;
  border-radius: 999px;
  background: rgba(19, 32, 53, 0.82);
  color: #fff;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.22);
}

.rich-attachment__expand:hover,
.rich-attachment__expand:focus-visible {
  background: rgba(31, 87, 194, 0.96);
}

.rich-content img,
.rich-content video {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: clamp(220px, 42vw, 520px);
  object-fit: contain;
  border-radius: 16px;
}

.attachment-viewer {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: 24px;
}

.attachment-viewer[hidden] {
  display: none;
}

.attachment-viewer__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(9, 14, 24, 0.82);
  backdrop-filter: blur(8px);
}

.attachment-viewer__dialog {
  position: relative;
  z-index: 1;
  width: min(1400px, calc(100vw - 48px));
  max-height: calc(100vh - 48px);
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.28);
  overflow: auto;
}

.attachment-viewer__close {
  position: sticky;
  top: 0;
  margin-left: auto;
  width: 42px;
  min-height: 42px;
  padding: 0;
  border-radius: 999px;
  background: rgba(19, 32, 53, 0.9);
  color: #fff;
  z-index: 2;
}

.attachment-viewer__controls {
  position: sticky;
  top: 0;
  z-index: 2;
  display: inline-flex;
  gap: 8px;
  margin: 0 auto 12px;
  padding: 8px;
  border-radius: 999px;
  background: rgba(19, 32, 53, 0.08);
}

.attachment-viewer__control {
  min-width: 54px;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(19, 32, 53, 0.88);
  color: #fff;
}

.attachment-viewer__content {
  display: grid;
  gap: 16px;
  justify-items: center;
}

.attachment-viewer__content .rich-table-scroll {
  max-width: 100%;
}

.attachment-viewer__content img,
.attachment-viewer__content video {
  width: auto;
  max-width: 100%;
  max-height: calc(100vh - 180px);
  object-fit: contain;
}

.attachment-viewer__zoomable-image {
  transform-origin: center center;
  transition: transform 0.16s ease;
  user-select: none;
}

.attachment-viewer__content table {
  width: max-content;
  max-width: none;
}

body.modal-open {
  overflow: hidden;
}

.bottom-nav {
  position: fixed;
  left: 50%;
  bottom: calc(12px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 40;
  width: min(720px, calc(100% - 20px));
  display: none;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 24px;
  background: rgba(13, 18, 31, 0.82);
  backdrop-filter: blur(22px);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.24);
}

.bottom-nav__item {
  display: grid;
  place-items: center;
  gap: 4px;
  min-height: 56px;
  padding: 6px 8px;
  border-radius: 16px;
  color: rgba(255, 255, 255, 0.9);
  text-align: center;
}

.bottom-nav__item:hover,
.bottom-nav__item:focus-visible {
  background: rgba(255, 255, 255, 0.12);
}

.bottom-nav__item.is-active {
  background: rgba(255, 255, 255, 0.18);
}

.bottom-nav__icon {
  font-size: 18px;
  line-height: 1;
}

.bottom-nav__label {
  font-size: 11px;
  font-weight: 600;
}

.mobile-profile {
  position: relative;
}

.mobile-profile[open] .mobile-profile__toggle {
  background: rgba(255, 255, 255, 0.18);
}

.mobile-profile__toggle {
  list-style: none;
  cursor: pointer;
}

.mobile-profile__toggle::-webkit-details-marker {
  display: none;
}

.mobile-profile__panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 10px);
  min-width: 180px;
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
  background: rgba(13, 18, 31, 0.94);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.24);
}

.mobile-profile__panel strong {
  color: #fff;
}

.mobile-profile__panel span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.mobile-profile__panel form {
  gap: 0;
}

.mobile-profile__panel button {
  width: 100%;
  min-height: 40px;
}

@media (max-width: 1180px) {
  .learn-layout {
    grid-template-columns: 240px minmax(0, 1fr);
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 920px) {
  html,
  body {
    height: 100dvh;
    overflow: hidden;
  }

  body {
    background:
      linear-gradient(180deg, #eff4fb 0%, #e9eef7 40%, #eef2f8 100%);
  }

  .learn-layout,
  .page-assistant .learn-layout {
    display: block;
    padding: 0;
    height: 100dvh;
    overflow: hidden;
  }

  .learn-sidebar,
  .page-assistant .learn-sidebar {
    display: none;
  }

  .learn-main {
    height: 100dvh;
    overflow-y: auto;
    overflow-x: hidden;
    padding-bottom: var(--mobile-nav-offset);
    -webkit-overflow-scrolling: touch;
  }

  .app-shell {
    min-height: 100%;
    padding-bottom: 0;
  }

  .app-shell::after {
    display: none;
  }

  .page {
    width: 100%;
    padding: calc(12px + env(safe-area-inset-top)) 12px 18px;
  }

  .page--app {
    position: relative;
  }

  .page--app > *:last-child {
    margin-bottom: calc(var(--mobile-nav-offset) + 16px);
  }

  .page--app::before {
    content: "";
    position: fixed;
    inset: 0;
    background:
      radial-gradient(circle at top center, rgba(47, 111, 237, 0.14), transparent 18rem),
      linear-gradient(180deg, rgba(255, 255, 255, 0.18), transparent 14rem);
    pointer-events: none;
    z-index: -1;
  }

  .auth-card,
  .section,
  .admin-card {
    padding: 18px;
    border-radius: 24px;
  }

  .stats-grid,
  .row.two {
    grid-template-columns: 1fr;
  }

  .page-knowledge .knowledge-list {
    grid-template-columns: 1fr;
  }

  .section,
  .admin-card,
  .stat-card,
  .quick-link-card {
    box-shadow: var(--shadow);
  }

  .bottom-nav {
    display: grid;
  }

  .modal-shell {
    padding: 12px;
    align-items: end;
    padding-bottom: calc(12px + var(--mobile-nav-offset));
  }

  .modal-card {
    width: 100%;
    max-height: 92dvh;
    padding: 18px;
    border-radius: 24px 24px 18px 18px;
  }

  .editor-meta,
  .modal-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .assistant-panel {
    grid-template-columns: 1fr;
    gap: 0;
    height: 100%;
  }

  .assistant-history {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 95;
    width: min(320px, 84vw);
    height: 100dvh;
    padding: 18px 16px;
    border-radius: 0 24px 24px 0;
    transform: translateX(-100%);
    transition: transform 0.22s ease;
  }

  .assistant-chat {
    min-height: 100%;
    height: 100%;
    padding: 0 12px 14px;
    grid-template-rows: auto 1fr auto;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }

  .assistant-chat__empty {
    min-height: 240px;
  }

  .assistant-chat__thread {
    padding: 12px 4px 24px;
    min-height: 0;
    overflow-y: auto;
  }

  .assistant-chat__mobile-topbar {
    display: grid;
    grid-template-columns: 40px 1fr 40px;
    align-items: center;
    min-height: 56px;
    padding-top: calc(2px + env(safe-area-inset-top));
  }

  .assistant-chat__menu,
  .assistant-chat__mobile-spacer {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    color: var(--text);
  }

  .assistant-chat__mobile-title {
    text-align: center;
    font-weight: 600;
  }

  .assistant-history-backdrop {
    position: fixed;
    inset: 0;
    z-index: 94;
    background: rgba(15, 23, 42, 0.28);
  }

  .assistant-history__close {
    position: absolute;
    top: 0;
    right: 0;
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    font-size: 26px;
    line-height: 1;
    color: var(--muted);
  }

  .assistant-history-toggle:checked ~ .assistant-panel .assistant-history {
    transform: translateX(0);
  }

  .assistant-history-toggle:checked ~ .assistant-panel .assistant-history-backdrop {
    display: block;
  }

  .page-assistant .app-shell {
    min-height: 100dvh;
    height: 100dvh;
    padding-bottom: var(--mobile-nav-offset);
    overflow: hidden;
  }

  .page-assistant .app-shell::after {
    display: none;
  }

  .page-assistant .page.page--app {
    height: calc(100dvh - var(--mobile-nav-offset));
    padding: 0;
    overflow: hidden;
  }

  .page-assistant .page.page--app > *:last-child {
    margin-bottom: 0;
  }

  .page-assistant .learn-main {
    display: block;
    height: calc(100dvh - var(--mobile-nav-offset));
    padding-bottom: 0;
  }

  body.page-assistant {
    overflow: hidden;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .auth-shell {
    padding: 16px;
  }

  .brand-mark {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    font-size: 24px;
  }

  .brand-logo {
    width: 64px;
    height: 64px;
  }

  .brand-logo-wrap {
    width: 64px;
    height: 64px;
  }

  .topbar-meta {
    flex-direction: column;
    gap: 4px;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
    margin-bottom: 12px;
  }

  .dashboard-article-card__header,
  .dashboard-article-card__footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .assistant-chat__bubble {
    max-width: 100%;
  }

  .assistant-chat__composer {
    border-radius: 24px;
  }

  .assistant-history {
    width: min(340px, 88vw);
  }

  .section-actions {
    width: 100%;
  }

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

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

  .bottom-nav {
    gap: 4px;
    padding: 8px 8px calc(8px + env(safe-area-inset-bottom));
  }

  .bottom-nav__item {
    min-width: 0;
    padding: 6px 4px;
  }

  .bottom-nav__label {
    font-size: 10px;
    white-space: nowrap;
  }

  .mobile-profile__panel {
    right: -6px;
    min-width: 164px;
  }

  .editor-toolbar {
    gap: 6px;
  }

  .editor-toolbar button {
    min-height: 34px;
    padding: 7px 10px;
    font-size: 13px;
  }

  .rich-editor {
    min-height: 260px;
    padding: 14px;
  }
}