.discussion-shell {
    position: relative;
    z-index: 1;
    --discussion-action: #ff78ad;
    --discussion-action-mid: #f06092;
    --discussion-action-deep: #e04882;
    --discussion-action-bg: linear-gradient(135deg, var(--discussion-action) 0%, var(--discussion-action-mid) 50%, var(--discussion-action-deep) 100%);
    --discussion-action-shadow: rgba(180, 80, 106, 0.22);
    --discussion-action-hover-shadow: rgba(180, 80, 106, 0.28);
    --discussion-solved-grad: linear-gradient(135deg, var(--sys-purple) 0%, var(--discussion-action) 100%);
    --discussion-solved-soft: linear-gradient(135deg, var(--sys-purple-soft), rgba(255, 120, 173, 0.12));
    --discussion-solved-ink: #5a4799;
    --discussion-solved-watermark: rgba(111, 85, 242, 0.12);
    --discussion-chip-active-bg: rgba(212, 120, 142, 0.16);
    --discussion-chip-active-border: rgba(212, 120, 142, 0.38);
    max-width: 1160px;
    margin: 0 auto;
    padding: 2.25rem 1.25rem 4rem;
  }

  .discussion-progress {
    position: fixed;
    inset: 0 0 auto;
    z-index: 80;
    height: 3px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.18s ease;
  }

  .discussion-progress.is-active {
    opacity: 1;
  }

  .discussion-progress span {
    display: block;
    width: 0;
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, #f68eb8, #d86d92, #ffb3ce);
    box-shadow: 0 0 18px rgba(216, 109, 146, 0.34);
    transition: width 0.22s ease;
  }

  .discussion-hero {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.15rem;
  }

  .discussion-hero h1 {
    margin: 0;
    color: #45313d;
    font-size: 1.85rem;
    line-height: 1.1;
    letter-spacing: 0;
  }

  .discussion-hero p {
    margin: 0.65rem 0 0;
    color: #87677a;
    font-size: 0.94rem;
    line-height: 1.65;
  }

  .discussion-topbar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.7rem;
    margin-left: auto;
  }

  .discussion-actions,
  .discussion-row,
  .discussion-filter,
  .discussion-chip-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    color: #9d6a80;
    font-size: 0.76rem;
    margin-top: 0.25rem;
  }

  .discussion-topic-stats,
  .discussion-topic-active {
    color: #9d6a80;
    font-size: 0.76rem;
    margin-top: 0.25rem;
  }

  .discussion-category-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
    gap: 0.6rem;
  }

  .discussion-category-card {
    display: grid;
    gap: 0.3rem;
    border: 1.5px solid rgba(212, 120, 142, 0.22);
    border-radius: 0.8rem;
    background: rgba(255, 255, 255, 0.72);
    padding: 0.7rem 0.8rem;
    cursor: pointer;
    transition: border-color 0.16s ease, background 0.16s ease, box-shadow 0.16s ease;
  }

  .discussion-category-card:hover {
    border-color: var(--discussion-action-mid);
    background: rgba(255, 240, 245, 0.85);
  }

  .discussion-category-card.is-selected {
    border-color: var(--discussion-action-mid);
    background: linear-gradient(135deg, rgba(255, 120, 173, 0.15), rgba(240, 96, 146, 0.1));
    box-shadow: 0 4px 16px rgba(210, 80, 120, 0.12);
  }

  .discussion-category-card-icon {
    width: 1.35rem;
    height: 1.35rem;
    color: var(--discussion-action-mid);
  }

  .discussion-category-card-name {
    font-weight: 780;
    color: #4a3042;
    font-size: 0.9rem;
  }

  .discussion-category-card-desc {
    font-size: 0.76rem;
    color: #9d6a80;
    line-height: 1.35;
  }

  .discussion-tag-input-wrap {
    display: flex;
    gap: 0.4rem;
  }

  .discussion-tag-input-wrap .discussion-input {
    flex: 1 1 auto;
  }

  .discussion-official-chip {
    cursor: pointer;
  }

  .discussion-official-chip.is-selected {
    border-color: var(--discussion-action-mid);
    background: linear-gradient(135deg, rgba(255, 120, 173, 0.18), rgba(240, 96, 146, 0.13));
    color: #b0506a;
  }

  .discussion-user-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
  }

  .discussion-user-tag-remove {
    cursor: pointer;
    font-weight: 800;
    margin-left: 0.1rem;
    opacity: 0.5;
  }

  .discussion-user-tag-remove:hover {
    opacity: 1;
  }

  .discussion-topic-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.55rem;
  }

  .discussion-btn,
  .discussion-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.15rem;
    border: 1.5px solid transparent;
    border-radius: 9999px;
    background: rgba(212, 120, 142, 0.1);
    color: var(--pink-dark);
    font: inherit;
    font-size: 0.86rem;
    font-weight: 760;
    line-height: 1;
    padding: 0.5rem 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  }

  .discussion-btn:hover,
  .discussion-chip:hover {
    border-color: var(--pink-deep);
    background: rgba(212, 120, 142, 0.18);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(212, 120, 142, 0.2);
  }

  .discussion-btn:focus-visible,
  .discussion-chip:focus-visible,
  .discussion-profile-item:focus-visible,
  .discussion-editor-bar button:focus-visible {
    outline: 2px solid rgba(111, 85, 242, 0.72);
    outline-offset: 3px;
  }

  .discussion-btn:disabled,
  .discussion-editor-bar button:disabled {
    cursor: not-allowed;
    filter: saturate(0.65);
    opacity: 0.58;
    transform: none;
    box-shadow: none;
  }

  .discussion-btn.primary {
    border-color: transparent;
    background-color: var(--discussion-action-mid);
    background-image: var(--discussion-action-bg);
    color: #fff;
    box-shadow: 0 8px 18px var(--discussion-action-shadow);
  }

  .discussion-btn.primary:hover,
  .discussion-btn.primary:focus-visible {
    border-color: transparent;
    background-color: var(--discussion-action-mid);
    background-image: var(--discussion-action-bg);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 12px 26px var(--discussion-action-hover-shadow);
  }

  .discussion-chip.active {
    border-color: var(--discussion-chip-active-border);
    background-color: var(--discussion-chip-active-bg);
    background-image: none;
    color: var(--pink-dark);
    box-shadow: none;
  }

  .discussion-btn.danger {
    border-color: rgba(188, 58, 86, 0.42);
    background: rgba(188, 58, 86, 0.06);
    color: #b83c5f;
  }

  .discussion-profile {
    position: relative;
  }

  .discussion-mail-button {
    position: relative;
    min-width: 2.65rem;
    min-height: 2.65rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--sys-purple);
  }

  .discussion-mail-badge {
    position: absolute;
    top: -0.18rem;
    right: -0.08rem;
    min-width: 1.05rem;
    min-height: 1.05rem;
    display: none;
    place-items: center;
    border-radius: 999px;
    background: #6f55f2;
    color: #fff;
    font-size: 0.66rem;
    font-weight: 900;
    line-height: 1;
    box-shadow: 0 6px 16px rgba(111, 85, 242, 0.28);
  }

  .discussion-mail-badge.is-visible {
    display: grid;
  }

  .discussion-profile-button {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    min-height: 2.65rem;
    border: 1.5px solid rgba(212, 120, 142, 0.28);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.74);
    color: #56364a;
    font: inherit;
    padding: 0.28rem 0.64rem 0.28rem 0.3rem;
    cursor: pointer;
    box-shadow: 0 10px 28px rgba(180, 80, 106, 0.08);
    transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease, box-shadow 0.16s ease;
  }

  .discussion-profile-button:hover,
  .discussion-profile-button:focus-visible {
    border-color: rgba(212, 120, 142, 0.52);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 14px 32px rgba(180, 80, 106, 0.12);
    transform: translateY(-1px);
    outline: none;
  }

  .discussion-profile-avatar {
    width: 2.18rem;
    height: 2.18rem;
    border-radius: 50%;
    font-size: 0.86rem;
  }

  .discussion-profile-label {
    display: grid;
    gap: 0.08rem;
    min-width: 0;
    text-align: left;
  }

  .discussion-profile-label strong,
  .discussion-profile-card strong {
    max-width: 8.5rem;
    overflow: hidden;
    color: #4b3041;
    font-size: 0.86rem;
    font-weight: 860;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .discussion-profile-label span,
  .discussion-profile-card span {
    color: #987488;
    font-size: 0.72rem;
    line-height: 1.35;
  }

  .discussion-profile-chevron {
    color: #a46f86;
    font-size: 0.9rem;
  }

  .discussion-profile-menu {
    position: absolute;
    top: calc(100% + 0.55rem);
    right: 0;
    z-index: 40;
    display: none;
    width: 14.5rem;
    border: 1px solid rgba(212, 120, 142, 0.22);
    border-radius: 0.95rem;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 18px 46px rgba(118, 54, 76, 0.16);
    padding: 0.55rem;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }

  .discussion-profile-menu.open {
    display: grid;
    gap: 0.22rem;
  }

  .discussion-profile-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.55rem;
    align-items: center;
    border-bottom: 1px solid rgba(212, 120, 142, 0.14);
    margin-bottom: 0.24rem;
    padding: 0.45rem 0.5rem 0.7rem;
  }

  .discussion-profile-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 2.25rem;
    border: 0;
    border-radius: 0.55rem;
    background: transparent;
    color: #624157;
    font: inherit;
    font-size: 0.86rem;
    font-weight: 760;
    padding: 0.45rem 0.6rem;
    text-align: left;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
  }

  .discussion-profile-item:hover,
  .discussion-profile-item:focus-visible {
    background: rgba(212, 120, 142, 0.11);
    color: var(--pink-dark);
    outline: none;
  }

  .discussion-profile-item.is-hidden {
    display: none;
  }

  .is-hidden {
    display: none !important;
  }

  .discussion-profile-auth {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
    padding: 0.4rem;
  }

  .discussion-profile-auth.is-visible {
    display: grid;
  }

  .discussion-profile-auth .discussion-btn {
    min-height: 2rem;
    padding-inline: 0.5rem;
  }