.app.forum-mode {
  grid-template-columns: 72px minmax(0, 1fr);
}

.app.forum-mode .category-sidebar,
.app.forum-mode .secondary-sidebar-toggle,
.app.forum-mode #searchShell {
  display: none;
}

.app.forum-mode .main-scroll {
  padding: 0;
}

.app.forum-mode .content {
  min-height: 100%;
}

.forum-shell {
  --forum-surface: rgba(15, 21, 55, 0.72);
  --forum-surface-strong: rgba(23, 31, 76, 0.94);
  --forum-line: rgba(166, 181, 255, 0.19);
  --forum-cyan: #64e0ff;
  --forum-violet: #ad8bff;
  --forum-ink: #f8f9ff;
  width: min(1120px, 100%);
  min-height: 100%;
  margin: 0 auto;
  padding: clamp(18px, 3vw, 42px);
  color: var(--forum-ink);
}

.forum-header {
  position: sticky;
  z-index: 8;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: calc(clamp(18px, 3vw, 42px) * -1) calc(clamp(18px, 3vw, 42px) * -1) 24px;
  padding: 20px clamp(18px, 3vw, 42px) 18px;
  border-bottom: 1px solid var(--forum-line);
  background: linear-gradient(180deg, rgba(7, 10, 29, 0.97), rgba(10, 14, 38, 0.88) 72%, rgba(10, 14, 38, 0));
  backdrop-filter: blur(18px);
}

.forum-heading h1 {
  margin: 1px 0 2px;
  font-family: "Arial Narrow", "Microsoft YaHei", sans-serif;
  font-size: clamp(28px, 4vw, 46px);
  font-stretch: condensed;
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 1;
}

.forum-heading p,
.forum-card-footer,
.forum-topic-meta,
.forum-reply-meta,
.forum-form-footer,
.forum-notification small {
  color: rgba(221, 227, 255, 0.66);
  font-size: 13px;
}

.forum-kicker {
  color: var(--forum-cyan);
  font: 700 10px/1.2 ui-monospace, "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.18em;
}

.forum-header-actions,
.forum-inline-actions,
.forum-topic-actions,
.forum-dialog-actions,
.forum-form-footer,
.forum-card-footer,
.forum-section-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.forum-header-actions {
  justify-content: flex-end;
  flex-wrap: wrap;
}

.forum-account {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  padding-right: 8px;
}

.forum-account-avatar {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  border: 1px solid rgba(100, 224, 255, 0.42);
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 0 0 3px rgba(100, 224, 255, 0.08);
}

.forum-account-avatar-fallback {
  display: grid;
  place-items: center;
  color: #09122d;
  background: linear-gradient(135deg, var(--forum-cyan), #c6b4ff);
  font-weight: 900;
}

.forum-account-copy {
  display: grid;
  min-width: 0;
  line-height: 1.25;
}

.forum-account-copy strong {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.forum-account-copy small {
  color: rgba(221, 227, 255, 0.52);
  font-size: 10px;
}

.forum-button,
.forum-text-button,
.forum-load-more,
.forum-back,
.forum-dialog-close {
  border: 1px solid transparent;
  color: #eef1ff;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.forum-button {
  min-height: 38px;
  padding: 0 14px;
  border-radius: 11px;
  font-size: 13px;
  font-weight: 700;
}

.forum-button-primary {
  color: #09132c;
  background: linear-gradient(135deg, var(--forum-cyan), #a8b7ff);
  box-shadow: 0 9px 26px rgba(72, 196, 255, 0.16);
}

.forum-button-quiet {
  border-color: var(--forum-line);
  background: rgba(125, 143, 218, 0.09);
}

.forum-button-quiet.is-active {
  border-color: rgba(100, 224, 255, 0.44);
  background: rgba(100, 224, 255, 0.12);
}

.forum-button-danger {
  border-color: rgba(255, 99, 143, 0.34);
  background: rgba(255, 99, 143, 0.12);
}

.forum-button:hover:not(:disabled),
.forum-load-more:hover,
.forum-back:hover,
.forum-dialog-close:hover {
  transform: translateY(-1px);
  border-color: rgba(100, 224, 255, 0.46);
}

.forum-button:disabled {
  cursor: wait;
  opacity: 0.58;
}

.forum-message-button {
  position: relative;
}

.forum-unread {
  position: absolute;
  top: -7px;
  right: -6px;
  min-width: 19px;
  height: 19px;
  padding: 0 5px;
  border: 2px solid #0c1230;
  border-radius: 999px;
  color: white;
  background: #ff638f;
  font-size: 10px;
  line-height: 15px;
}

.forum-feed,
.forum-detail,
.forum-notifications {
  display: grid;
  gap: 16px;
}

.forum-tag-filter,
.forum-card-tags,
.forum-tag-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.forum-tag-filter {
  padding-bottom: 4px;
}

.forum-tag {
  --forum-tag-color: #7f96ff;
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 0 10px;
  border: 1px solid color-mix(in srgb, var(--forum-tag-color) 50%, transparent);
  border-radius: 999px;
  color: color-mix(in srgb, var(--forum-tag-color) 76%, white);
  background: color-mix(in srgb, var(--forum-tag-color) 13%, transparent);
  font-size: 12px;
  font-weight: 700;
}

button.forum-tag {
  cursor: pointer;
}

.forum-tag.is-active,
.forum-tag-all.is-active {
  color: #071127;
  background: var(--forum-tag-color);
  box-shadow: 0 7px 22px color-mix(in srgb, var(--forum-tag-color) 22%, transparent);
}

.forum-tag-all {
  --forum-tag-color: #d9e0ff;
}

.forum-tag.is-inactive {
  filter: saturate(0.25);
  opacity: 0.68;
}

.forum-post-list,
.forum-reply-list,
.forum-notification-list {
  display: grid;
  gap: 11px;
}

.forum-post-card,
.forum-topic,
.forum-reply,
.forum-notification,
.forum-reply-form,
.forum-empty,
.forum-loading {
  border: 1px solid var(--forum-line);
  background: linear-gradient(145deg, rgba(25, 33, 78, 0.72), rgba(10, 15, 43, 0.72));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), 0 14px 34px rgba(2, 5, 23, 0.16);
}

.forum-post-card {
  position: relative;
  padding: 18px 20px 14px;
  border-radius: 16px;
}

.forum-post-card::before {
  content: "";
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 0;
  width: 2px;
  border-radius: 99px;
  background: linear-gradient(var(--forum-cyan), var(--forum-violet));
  opacity: 0;
  transition: opacity 160ms ease;
}

.forum-post-card:hover::before,
.forum-post-card:focus-within::before {
  opacity: 1;
}

.forum-post-open {
  width: 100%;
  padding: 15px 0;
  color: inherit;
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.forum-post-open h2,
.forum-topic h2,
.forum-section-title h2,
.forum-section-title h3 {
  margin: 0;
  color: #fbfbff;
  letter-spacing: -0.02em;
}

.forum-post-open h2 {
  font-size: clamp(18px, 2.2vw, 23px);
}

.forum-post-open p {
  margin-top: 8px;
  color: rgba(226, 231, 255, 0.72);
  line-height: 1.7;
}

.forum-card-footer {
  justify-content: flex-start;
  flex-wrap: wrap;
  border-top: 1px solid rgba(166, 181, 255, 0.11);
  padding-top: 12px;
}

.forum-card-footer .forum-inline-actions {
  margin-left: auto;
}

.forum-alias {
  color: #c8b8ff;
  font: 700 12px/1.3 ui-monospace, "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.03em;
}

.forum-text-button {
  padding: 4px 6px;
  color: rgba(221, 227, 255, 0.68);
  background: transparent;
  font-size: 12px;
}

.forum-text-button:hover {
  color: var(--forum-cyan);
}

.forum-text-button.is-danger:hover {
  color: #ff8cab;
}

.forum-load-more,
.forum-back {
  justify-self: center;
  padding: 10px 16px;
  border-color: var(--forum-line);
  border-radius: 11px;
  background: rgba(122, 143, 224, 0.09);
}

.forum-back {
  justify-self: start;
  border: 0;
  padding-left: 0;
  color: rgba(221, 227, 255, 0.68);
  background: transparent;
}

.forum-topic {
  padding: clamp(22px, 4vw, 38px);
  border-radius: 19px;
}

.forum-topic h2 {
  margin-top: 18px;
  font-size: clamp(25px, 4vw, 38px);
}

.forum-topic-meta,
.forum-reply-meta {
  justify-content: space-between;
  margin-top: 12px;
}

.forum-content-text {
  margin-top: 22px;
  color: rgba(241, 243, 255, 0.88);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.85;
}

.forum-topic-actions {
  justify-content: flex-end;
  margin-top: 24px;
}

.forum-section-title {
  justify-content: space-between;
  margin-top: 10px;
}

.forum-reply {
  padding: 18px 20px;
  border-radius: 14px;
}

.forum-reply .forum-inline-actions {
  justify-content: flex-end;
  margin-top: 10px;
}

.forum-reply-form {
  display: grid;
  gap: 10px;
  margin-top: 10px;
  padding: 20px;
  border-radius: 15px;
}

.forum-reply-form label,
.forum-field > span,
.forum-tag-picker legend {
  color: rgba(236, 239, 255, 0.82);
  font-size: 13px;
  font-weight: 700;
}

.forum-field-heading,
.forum-tag-picker legend {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.forum-field-heading small,
.forum-tag-picker legend small {
  color: rgba(221, 227, 255, 0.58);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.forum-reply-form textarea,
.forum-field input,
.forum-field textarea,
.forum-tag-create input {
  width: 100%;
  border: 1px solid rgba(166, 181, 255, 0.22);
  border-radius: 11px;
  outline: none;
  color: white;
  background: rgba(6, 10, 31, 0.7);
}

.forum-reply-form textarea,
.forum-field textarea {
  min-height: 100px;
  padding: 12px 14px;
  resize: vertical;
  line-height: 1.65;
}

.forum-field input,
.forum-tag-create input,
.forum-tag-admin-row > input {
  min-height: 42px;
  padding: 0 12px;
}

.forum-form-footer {
  justify-content: space-between;
}

.forum-notification {
  display: grid;
  gap: 5px;
  width: 100%;
  padding: 16px 18px;
  border-radius: 14px;
  color: rgba(235, 239, 255, 0.82);
  cursor: pointer;
  text-align: left;
}

.forum-notification.is-unread {
  border-color: rgba(100, 224, 255, 0.38);
  background: linear-gradient(145deg, rgba(39, 64, 112, 0.78), rgba(15, 23, 62, 0.78));
}

.forum-notification strong {
  color: white;
}

.forum-empty,
.forum-loading {
  display: grid;
  place-items: center;
  gap: 9px;
  min-height: 190px;
  padding: 28px;
  border-radius: 16px;
  color: rgba(221, 227, 255, 0.64);
  text-align: center;
}

.forum-empty strong {
  color: white;
  font-size: 18px;
}

.forum-error {
  padding: 11px 13px;
  border: 1px solid rgba(255, 99, 143, 0.3);
  border-radius: 10px;
  color: #ffadc2;
  background: rgba(255, 99, 143, 0.1);
}

.forum-dialog-backdrop {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(3, 5, 19, 0.76);
  backdrop-filter: blur(12px);
}

.forum-dialog-card {
  display: grid;
  gap: 18px;
  width: min(620px, 100%);
  max-height: min(84vh, 780px);
  overflow: auto;
  padding: clamp(20px, 4vw, 30px);
  border: 1px solid rgba(171, 186, 255, 0.26);
  border-radius: 18px;
  background: linear-gradient(155deg, rgba(28, 37, 86, 0.98), rgba(8, 13, 40, 0.98));
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.48);
}

.forum-compose {
  width: min(720px, 100%);
}

.forum-dialog-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.forum-dialog-head h2 {
  margin: 0;
}

.forum-dialog-close {
  padding: 5px;
  color: rgba(224, 230, 255, 0.64);
  background: transparent;
}

.forum-field {
  display: grid;
  gap: 7px;
}

.forum-tag-picker {
  padding: 0;
  border: 0;
}

.forum-tag-picker legend {
  width: 100%;
  margin-bottom: 8px;
}

.forum-tag-choice {
  position: relative;
  cursor: pointer;
}

.forum-tag-choice input {
  position: absolute;
  opacity: 0;
}

.forum-tag-choice input:checked + .forum-tag {
  color: #071127;
  background: var(--forum-tag-color);
}

.forum-dialog-actions {
  justify-content: flex-end;
}

.forum-tag-admin-list {
  display: grid;
  gap: 8px;
}

.forum-tag-admin-row,
.forum-tag-create {
  display: grid;
  grid-template-columns: minmax(110px, 1.2fr) 52px minmax(80px, 0.6fr) auto auto;
  align-items: center;
  gap: 10px;
}

.forum-tag-admin-row > input[type="color"] {
  min-height: 42px;
  padding: 4px;
}

.forum-tag-active {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.forum-tag-create {
  grid-template-columns: 1.2fr 0.8fr 0.7fr auto;
  padding-top: 14px;
  border-top: 1px solid var(--forum-line);
}

.forum-identity {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 10px 14px;
}

.forum-identity dt {
  color: rgba(221, 227, 255, 0.58);
}

.forum-identity dd {
  overflow-wrap: anywhere;
}

.forum-identity-deleted {
  padding: 22px;
  border: 1px dashed var(--forum-line);
  border-radius: 12px;
  text-align: center;
}

.forum-login-gate {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 16px;
  min-height: 60vh;
  color: rgba(226, 231, 255, 0.72);
}

.forum-login-button {
  min-height: 42px;
  padding: 0 18px;
  border-radius: 12px;
  color: #09132c;
  background: linear-gradient(135deg, var(--forum-cyan, #64e0ff), #b7a5ff);
  cursor: pointer;
  font-weight: 800;
}

.forum-shell :focus-visible {
  outline: 2px solid #78e6ff;
  outline-offset: 3px;
  box-shadow: 0 0 0 5px rgba(100, 224, 255, 0.13);
}

@media (max-width: 920px) {
  .forum-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .forum-header-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .forum-account {
    margin-right: auto;
  }
}

@media (max-width: 720px) {
  .app.forum-mode {
    grid-template-columns: minmax(0, 1fr);
  }

  .app.forum-mode .main-panel {
    margin-bottom: 76px;
  }

  .forum-shell {
    padding: 14px 12px 34px;
  }

  .forum-header {
    margin: -14px -12px 16px;
    padding: 14px 12px 12px;
    gap: 12px;
  }

  .forum-heading p,
  .forum-account-copy small {
    display: none;
  }

  .forum-header-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) repeat(3, auto);
    gap: 6px;
  }

  .forum-account-copy strong {
    max-width: 88px;
  }

  .forum-button {
    min-height: 36px;
    padding: 0 10px;
  }

  .forum-post-card,
  .forum-reply {
    padding: 15px;
  }

  .forum-card-footer .forum-inline-actions {
    width: 100%;
    margin-left: 0;
  }

  .forum-topic {
    padding: 20px 16px;
  }

  .forum-tag-create,
  .forum-tag-admin-row {
    grid-template-columns: 1fr;
  }

  .forum-dialog-backdrop {
    align-items: end;
    padding: 0;
  }

  .forum-dialog-card {
    width: 100%;
    max-height: 92vh;
    border-radius: 20px 20px 0 0;
  }
}

@media (max-width: 480px) {
  .forum-header-actions {
    grid-template-columns: minmax(0, 1fr) repeat(3, 38px);
  }

  .forum-header-actions > .forum-button:not(.forum-button-primary) {
    width: 38px;
    overflow: hidden;
    padding: 0;
    font-size: 0;
  }

  .forum-header-actions > [data-forum-mine]::before { content: "我"; font-size: 13px; }
  .forum-header-actions > [data-forum-notifications]::before { content: "信"; font-size: 13px; }
  .forum-header-actions > [data-forum-manage-tags]::before { content: "签"; font-size: 13px; }
  .forum-header-actions > .forum-button-primary { min-width: 52px; }
}

@media (prefers-reduced-motion: reduce) {
  .forum-shell *,
  .forum-shell *::before,
  .forum-shell *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}