:root {
  color-scheme: light;
  --ink: #1d2528;
  --muted: #637075;
  --line: #dbe2df;
  --surface: #ffffff;
  --wash: #f5f7f3;
  --accent: #0f7b78;
  --accent-strong: #0a5d5b;
  --sun: #e2a72e;
  --coral: #d9573f;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--wash);
  color: var(--ink);
}

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

button {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 7px;
  min-height: 40px;
  padding: 0 14px;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

button.primary:hover {
  background: var(--accent-strong);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
  padding: 0 clamp(16px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  color: var(--ink);
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
}

.account-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.account-label {
  color: var(--muted);
  font-size: 14px;
}

.account-label strong {
  color: var(--ink);
}

.role-badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  margin-left: 6px;
  border: 1px solid #bdd5d1;
  border-radius: 999px;
  padding: 1px 8px;
  background: #eef8f6;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.shell {
  width: min(1380px, 100%);
  margin: 0 auto;
  padding: 28px clamp(16px, 4vw, 48px) 56px;
}

.test-notice {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  width: min(1380px, calc(100% - 32px));
  margin: 16px auto 0;
  border: 1px solid #e5bf72;
  border-radius: 8px;
  padding: 12px 14px;
  background: #fff7e6;
  color: #644614;
}

.test-notice strong {
  display: block;
  margin-bottom: 2px;
  color: #4c360f;
}

.test-notice p {
  color: #644614;
  line-height: 1.4;
}

.test-notice-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #d9573f;
  color: white;
  font-weight: 900;
}

.test-notice.compact {
  width: 100%;
  margin: 0;
  padding: 10px;
}

.powered-by {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 26px clamp(16px, 4vw, 48px) 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.partner-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.partner-logos a {
  display: inline-flex;
  align-items: center;
}

.partner-logos a:hover {
  opacity: 0.82;
}

.partner-logos img {
  display: block;
  max-width: 170px;
  max-height: 54px;
  object-fit: contain;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

h1 {
  margin: 0 0 8px;
  max-width: 820px;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1;
  letter-spacing: 0;
}

p {
  margin: 0;
  color: var(--muted);
}

a {
  color: var(--accent-strong);
}

.topic-body a,
.post a,
.message a,
.rich-text a {
  overflow-wrap: anywhere;
  font-weight: 700;
}

.ask,
.filters {
  display: flex;
  gap: 10px;
}

.ask input,
.filters input,
select,
textarea,
label > input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 10px 12px;
  background: var(--surface);
  color: var(--ink);
}

textarea {
  resize: vertical;
}

.filters {
  align-items: center;
  margin-bottom: 18px;
}

.filters > input {
  max-width: 320px;
}

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

.tab.active {
  border-color: var(--accent);
  color: var(--accent-strong);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.view-button.active {
  border-color: var(--accent);
  color: var(--accent-strong);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.message-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  min-height: 22px;
  margin-left: 6px;
  border-radius: 999px;
  padding: 0 6px;
  background: var(--coral);
  color: white;
  font-size: 12px;
  font-weight: 800;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 500px);
  gap: 22px;
  align-items: start;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.messages-layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 18px;
  min-height: 680px;
}

.maintenance-panel {
  display: grid;
  gap: 14px;
  max-width: 680px;
  border: 1px solid #d9b45f;
  border-radius: 8px;
  padding: 24px;
  background: #fff8e8;
}

.maintenance-panel h1 {
  font-size: 34px;
}

.maintenance-panel p {
  color: #584218;
  line-height: 1.55;
}

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

.admin-panel {
  display: grid;
  gap: 18px;
}

.admin-panel h1 {
  font-size: 34px;
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}

.stat-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #fff;
}

.stat-card strong {
  display: block;
  color: var(--ink);
  font-size: 30px;
  line-height: 1;
}

.stat-card span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.admin-settings {
  display: grid;
  gap: 12px;
  max-width: 760px;
}

.setting-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fff;
}

.setting-row input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
}

.setting-row strong,
.setting-row small {
  display: block;
}

.setting-row small {
  margin-top: 4px;
  color: var(--muted);
}

.admin-settings footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.conversation-panel,
.message-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.conversation-panel {
  padding: 14px;
}

.new-message-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: end;
}

.conversation-list,
.user-search-results {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.conversation-item,
.user-search-results button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 54px;
  padding: 8px 10px;
  text-align: left;
}

.conversation-item.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.conversation-item span {
  display: grid;
  min-width: 0;
}

.conversation-item small {
  overflow: hidden;
  color: var(--muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.conversation-item em {
  min-width: 24px;
  border-radius: 999px;
  padding: 2px 7px;
  background: var(--coral);
  color: white;
  font-style: normal;
  text-align: center;
}

.user-search-results span {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.message-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-height: 680px;
}

.message-header {
  min-height: 58px;
  border-bottom: 1px solid var(--line);
  padding: 16px;
  color: var(--muted);
}

.message-thread {
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: auto;
  padding: 16px;
}

.message {
  max-width: min(620px, 82%);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #f8faf7;
}

.message.mine {
  align-self: flex-end;
  border-color: #bdd5d1;
  background: #eef8f6;
}

.message p {
  color: var(--ink);
  white-space: pre-wrap;
}

.message span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.message-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding: 12px;
}

.empty-state.compact {
  padding: 14px;
}

.topic-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
}

.topic-card:hover {
  border-color: #9ab7b3;
}

.topic-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #dde7e0;
}

.topic-card .body {
  padding: 14px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.pill {
  color: #794f00;
  background: #fff2cc;
  border-radius: 999px;
  padding: 2px 8px;
}

.topic-card h2 {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.2;
  letter-spacing: 0;
}

.topic-card p,
.post p,
.topic-body,
.rich-text {
  line-height: 1.55;
}

.rich-text {
  display: grid;
  gap: 8px;
  color: var(--ink);
}

.rich-text p {
  margin: 0;
  color: var(--ink);
}

.rich-text ul,
.rich-text ol {
  margin: 0;
  padding-left: 22px;
  color: var(--ink);
}

.rich-text code {
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
  background: rgba(255, 255, 255, 0.75);
  font-size: 0.95em;
}

.format-hint {
  margin-top: -4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.image-thumb {
  display: block;
  min-height: 0;
  border: 0;
  border-radius: 7px;
  padding: 0;
  overflow: hidden;
  background: #dde7e0;
}

.image-thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.16s ease;
}

.image-thumb:hover img {
  transform: scale(1.03);
}

.preview-picker {
  display: grid;
  gap: 8px;
}

.preview-picker > span {
  color: var(--muted);
  font-size: 14px;
}

.preview-picker > div {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preview-choice {
  width: 82px;
  height: 62px;
  min-height: 0;
  padding: 0;
  overflow: hidden;
}

.preview-choice.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent);
}

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

.detail {
  position: sticky;
  top: 84px;
  max-height: calc(100vh - 104px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.detail-content {
  padding: 18px;
}

.detail h2 {
  margin: 0 0 10px;
  font-size: 28px;
  line-height: 1.12;
}

.detail-title-row {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.small-action {
  min-height: 30px;
  padding: 0 10px;
  color: var(--accent-strong);
  font-size: 13px;
}

.small-action.danger {
  color: #a53625;
}

.author-link {
  display: inline;
  min-height: 0;
  border: 0;
  border-radius: 0;
  padding: 0;
  background: transparent;
  color: var(--accent-strong);
  font: inherit;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.action-row {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.summary {
  margin: 12px 0;
  border-left: 4px solid var(--sun);
  padding: 10px 12px;
  background: #fff8e8;
  color: #584218;
}

.post {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  margin-top: 14px;
}

.replies-section {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.replies-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.replies-header h3 {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
}

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

.reply-list {
  display: grid;
}

.reply-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.reply-pagination .small-action:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.reply-page-jump {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  color: var(--muted);
  font-size: 13px;
}

.reply-page-jump label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.reply-page-jump input {
  width: 78px;
  min-height: 32px;
  padding: 4px 8px;
}

.post-meta {
  align-items: center;
}

.post-actions {
  margin-left: auto;
}

.reply-form {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.topic-assist-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
}

.login-note {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin-top: 18px;
  color: var(--muted);
}

.login-note button {
  min-height: 32px;
  color: var(--accent-strong);
}

.answer {
  margin-bottom: 18px;
  border: 1px solid #a7c4bf;
  border-radius: 8px;
  padding: 16px;
  background: #eef8f6;
  white-space: pre-wrap;
}

.answer h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.answer-text {
  display: grid;
  gap: 8px;
  line-height: 1.55;
}

.answer-text p {
  margin: 0;
}

.answer-text ul {
  margin: 0;
  padding-left: 22px;
}

.answer-text code {
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
  background: rgba(255, 255, 255, 0.75);
  font-size: 0.95em;
}

.answer-text a {
  color: var(--accent-strong);
  font-weight: 700;
}

.inline-source {
  display: inline;
  min-height: 0;
  border: 0;
  border-radius: 4px;
  padding: 0 3px;
  background: transparent;
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: underline;
}

.source-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 10px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid #c8dcd8;
}

.source-card {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 10px;
  min-height: 92px;
  max-width: 100%;
  padding: 8px;
  border-color: #bdd5d1;
  background: rgba(255, 255, 255, 0.74);
  overflow-wrap: anywhere;
  color: var(--accent-strong);
  text-align: left;
}

.source-card:hover {
  border-color: var(--accent);
}

.source-card img {
  width: 92px;
  height: 74px;
  border-radius: 6px;
  object-fit: cover;
  background: #dde7e0;
}

.source-card-body {
  display: grid;
  gap: 5px;
  align-content: start;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.source-card-body strong {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.25;
}

.hidden {
  display: none;
}

.empty-state {
  padding: 24px;
  color: var(--muted);
}

dialog {
  width: min(720px, calc(100vw - 32px));
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0;
}

dialog::backdrop {
  background: rgba(18, 25, 27, 0.5);
}

.image-dialog {
  width: min(96vw, 1500px);
  max-height: 94vh;
  border: 0;
  background: transparent;
  padding: 0;
}

.image-dialog::backdrop {
  background: rgba(12, 16, 17, 0.82);
}

.image-dialog img {
  display: block;
  max-width: 96vw;
  max-height: 94vh;
  margin: 0 auto;
  border-radius: 8px;
  object-fit: contain;
  background: #111;
}

.image-dialog-nav {
  position: fixed;
  top: 50%;
  z-index: 2;
  width: 48px;
  height: 64px;
  min-height: 0;
  border-color: rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  padding: 0;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font-size: 42px;
  line-height: 1;
  transform: translateY(-50%);
}

.image-dialog-nav.prev {
  left: 18px;
}

.image-dialog-nav.next {
  right: 18px;
}

.image-counter {
  position: fixed;
  left: 50%;
  bottom: 18px;
  z-index: 2;
  border-radius: 999px;
  padding: 7px 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  transform: translateX(-50%);
}

.image-dialog-close {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 2;
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.92);
}

.form {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.form header,
.form footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.form h2 {
  margin: 0;
}

.auth-mode {
  display: flex;
  gap: 8px;
}

.form-message {
  border: 1px solid #efc2b8;
  border-radius: 7px;
  padding: 10px 12px;
  background: #fff0ed;
  color: #8c2d1d;
}

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

.icon {
  width: 40px;
  padding: 0;
  font-size: 24px;
}

@media (max-width: 980px) {
  .toolbar,
  .layout,
  .messages-layout {
    grid-template-columns: 1fr;
  }

  .detail {
    position: static;
    max-height: none;
  }
}

@media (max-width: 620px) {
  .topbar {
    height: auto;
    padding-block: 12px;
    align-items: flex-start;
  }

  .account-nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .powered-by {
    flex-direction: column;
    gap: 12px;
  }

  .ask,
  .filters,
  .topic-assist-row {
    flex-direction: column;
    align-items: stretch;
  }

  .topic-assist-row {
    display: flex;
  }

  .message-form,
  .new-message-form {
    grid-template-columns: 1fr;
  }

  .filters > input {
    max-width: none;
  }
}