/* Tethys System Sakura Grid skin: scoped to the discussion board only. */
  .discussion-shell {
    --sys-ink: #351f4e;
    --sys-purple: #6f55f2;
    --sys-purple-soft: rgba(111, 85, 242, 0.16);
    --sys-purple-line: rgba(90, 70, 210, 0.28);
    --sys-rose-line: rgba(212, 120, 142, 0.36);
    --sys-panel: rgba(255, 251, 255, 0.78);
    --sys-panel-solid: rgba(255, 252, 255, 0.94);
    --sys-grid: rgba(107, 91, 214, 0.18);
    isolation: isolate;
    position: relative;
    max-width: 1240px;
    font-family: "Fira Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  }

  .discussion-shell::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    right: 50%;
    height: 100%;
    margin-left: -50vw;
    margin-right: -50vw;
    width: 100vw;
    z-index: 0;
    pointer-events: none;
    background:
      linear-gradient(var(--sys-grid) 1px, transparent 1px),
      linear-gradient(90deg, var(--sys-grid) 1px, transparent 1px),
      radial-gradient(circle at 78% 10%, rgba(111, 85, 242, 0.18), transparent 34%),
      radial-gradient(circle at 10% 18%, rgba(232, 120, 154, 0.2), transparent 28%);
    background-size: 64px 64px, 64px 64px, auto, auto;
    mask-image: linear-gradient(180deg, #000 0%, rgba(0,0,0,0.72) 58%, transparent 100%);
  }

  .discussion-shell::after {
    content: "TETHYS";
    position: absolute;
    top: 1.8rem;
    right: 2rem;
    z-index: 0;
    color: rgba(92, 70, 210, 0.11);
    font-family: "Fira Code", "Consolas", monospace;
    font-size: clamp(4rem, 13vw, 10rem);
    font-weight: 900;
    letter-spacing: -0.08em;
    line-height: 0.8;
    pointer-events: none;
  }

  .discussion-shell > .discussion-hero {
    position: relative;
    z-index: 2;
  }

  .discussion-shell > * {
    position: relative;
    z-index: 1;
  }

  .discussion-hero {
    align-items: center;
    border: 1px solid var(--sys-purple-line);
    border-radius: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.72), rgba(255, 238, 248, 0.64));
    box-shadow: 10px 10px 0 rgba(111, 85, 242, 0.08);
    padding: 1rem;
  }

  .discussion-hero h1 {
    color: var(--sys-ink);
    font-family: "Fira Code", "Consolas", monospace;
    text-transform: uppercase;
  }

  .discussion-hero h1::before {
    content: "Tethys System / ";
    color: var(--sys-purple);
    font-size: 0.72em;
  }

  .discussion-hero p,
  .discussion-topic-meta,
  .discussion-empty,
  .discussion-status {
    color: #6f5876;
  }

  .discussion-panel,
  .discussion-topic-card,
  .discussion-floor-card,
  .discussion-resource-card,
  .discussion-setting-card,
  .discussion-profile-stat {
    border: 1px solid var(--sys-purple-line);
    border-radius: 0.86rem;
    background: var(--sys-panel);
    box-shadow: 8px 8px 0 rgba(111, 85, 242, 0.07);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .discussion-panel {
    position: relative;
    padding: 1.05rem;
  }

  .discussion-panel::before {
    content: "/shinsekai/tethys";
    display: block;
    margin: -1.05rem -1.05rem 0.9rem;
    border-bottom: 1px solid var(--sys-purple-line);
    border-radius: 0.86rem 0.86rem 0 0;
    background: rgba(255, 255, 255, 0.56);
    color: rgba(53, 31, 78, 0.58);
    font-family: "Fira Code", "Consolas", monospace;
    font-size: 0.66rem;
    letter-spacing: 0.04em;
    padding: 0.48rem 0.72rem;
  }

  .discussion-profile-page::before {
    grid-column: 1 / -1;
  }

  .discussion-profile-page {
    grid-template-columns: minmax(13rem, 15rem) minmax(0, 1fr);
    align-items: start;
    gap: 1.05rem;
  }

  .discussion-profile-sidebar {
    width: 100%;
    min-width: 0;
    overflow: hidden;
    position: sticky;
    top: 5.4rem;
    border: 1px solid var(--sys-purple-line);
    border-radius: 0.86rem;
    background: rgba(255, 251, 255, 0.66);
    box-shadow: 8px 8px 0 rgba(111, 85, 242, 0.06);
    padding: 0.85rem;
  }

  .discussion-profile-main {
    min-width: 0;
  }

  .discussion-profile-section {
    border: 1px solid var(--sys-purple-line);
    border-radius: 0.86rem;
    background: rgba(255, 251, 255, 0.58);
    box-shadow: 6px 6px 0 rgba(111, 85, 242, 0.05);
    padding: 0.95rem;
  }

  .discussion-profile-nav a.active,
  .discussion-profile-nav a:hover {
    background: rgba(232, 120, 154, 0.2);
    color: var(--sys-ink);
  }

  .discussion-panel-title {
    color: var(--sys-ink);
    font-family: "Fira Code", "Consolas", monospace;
    text-transform: uppercase;
  }

  .discussion-panel-title::before {
    content: "// ";
    color: var(--sys-purple);
  }

  .discussion-btn,
  .discussion-chip,
  .discussion-input,
  .discussion-select,
  .discussion-textarea,
  .discussion-editor,
  .discussion-editor-bar button,
  .discussion-profile-button,
  .discussion-profile-menu,
  .discussion-profile-item {
    border-radius: 0.58rem;
  }

  .discussion-btn,
  .discussion-chip {
    border-color: var(--sys-purple-line);
    background: rgba(255, 255, 255, 0.58);
    color: var(--sys-ink);
    font-family: "Fira Code", "Consolas", monospace;
    font-size: 0.78rem;
  }

  .discussion-btn:hover,
  .discussion-chip:hover {
    border-color: var(--sys-purple);
    background: rgba(111, 85, 242, 0.1);
    color: var(--sys-ink);
  }

  .discussion-btn.primary,
  .discussion-reaction-button.is-active {
    background-color: var(--discussion-action-mid);
    background-image: var(--discussion-action-bg);
    color: #fff;
    border-color: transparent;
  }

  .discussion-chip.active,
  .discussion-icon-btn.is-active {
    border-color: var(--sys-purple);
    background: var(--sys-purple);
    color: #fff;
  }

  .discussion-topic-card {
    position: relative;
    grid-template-columns: 3.4rem minmax(0, 1fr) minmax(6.8rem, auto);
    overflow: hidden;
  }

  .discussion-topic-card::before {
    content: "NODE";
    position: absolute;
    top: 0.62rem;
    right: 0.72rem;
    color: rgba(111, 85, 242, 0.18);
    font-family: "Fira Code", "Consolas", monospace;
    font-size: 1.4rem;
    font-weight: 900;
    letter-spacing: -0.04em;
  }

  .discussion-topic-title,
  .discussion-author-name {
    color: var(--sys-ink);
  }

  .discussion-topic-title:hover {
    color: var(--sys-purple);
  }

  .discussion-avatar {
    border: 1px solid rgba(255, 255, 255, 0.76);
    border-radius: 0;
    background: linear-gradient(135deg, #e8789a, #6f55f2);
    box-shadow: 5px 5px 0 rgba(111, 85, 242, 0.12);
  }

  .discussion-editor {
    border-color: var(--sys-purple-line);
    background:
      linear-gradient(rgba(111, 85, 242, 0.08) 1px, transparent 1px),
      rgba(255, 255, 255, 0.64);
    background-size: 100% 2.4rem;
  }

  .discussion-preview {
    border-top-color: var(--sys-purple-line);
  }

  .discussion-detail-layout {
    display: grid;
    grid-template-columns: minmax(9.5rem, 12rem) minmax(0, 1fr) 260px;
    gap: 1rem;
    align-items: start;
  }

  .discussion-detail-main {
    min-width: 0;
  }

  .discussion-detail-main .discussion-thread-head {
    grid-template-columns: minmax(0, 1fr);
  }

  .discussion-detail-side {
    min-width: 0;
  }

  .discussion-floating-rail {
    position: sticky;
    top: 5.4rem;
    display: grid;
    gap: 0.7rem;
    min-width: 0;
  }

  .discussion-floating-card,
  .discussion-floating-tools {
    border: 1px solid var(--sys-purple-line);
    border-radius: 0.8rem;
    background: var(--sys-panel-solid);
    box-shadow: 8px 8px 0 rgba(111, 85, 242, 0.09);
  }

  .discussion-mobile-tools {
    display: none;
  }

  .discussion-floating-card {
    display: grid;
    gap: 0.75rem;
    padding: 0.8rem;
    transition: opacity 0.18s ease, transform 0.18s ease, max-height 0.18s ease;
  }

  .discussion-floating-card::before {
    content: "// AUTHOR_NODE";
    color: var(--sys-purple);
    font-family: "Fira Code", "Consolas", monospace;
    font-size: 0.68rem;
    font-weight: 800;
  }

  .discussion-floating-card .discussion-author-card {
    justify-items: center;
    text-align: center;
  }

  .discussion-floating-tools {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding: 0;
    transform: translateY(-0.4rem);
    transition: opacity 0.18s ease, transform 0.18s ease, max-height 0.18s ease, padding 0.18s ease;
  }

  .discussion-floating-rail.is-tools .discussion-floating-card {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding-block: 0;
    transform: translateY(-0.4rem);
  }

  .discussion-floating-rail.is-tools .discussion-floating-tools {
    max-height: 9rem;
    opacity: 1;
    padding: 0.6rem;
    transform: translateY(0);
  }

  .discussion-tool-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.4rem;
    height: 2.4rem;
    border: 1px solid var(--sys-purple-line);
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.66);
    color: var(--sys-ink);
    font-family: "Fira Code", "Consolas", monospace;
    font-size: 1rem;
    font-weight: 900;
    text-decoration: none;
    cursor: pointer;
  }

  .discussion-tool-icon:hover,
  .discussion-tool-icon:focus-visible {
    border-color: var(--sys-purple);
    background: var(--sys-purple);
    color: #fff;
    outline: none;
  }

  @media (prefers-reduced-motion: reduce) {
    .discussion-floating-card,
    .discussion-floating-tools,
    .discussion-btn,
    .discussion-chip,
    .discussion-publish-link {
      transition: none !important;
    }
  }

  @media (max-width: 1080px) {
    .discussion-detail-layout {
      grid-template-columns: minmax(0, 1fr) 260px;
    }

    .discussion-floating-rail {
      display: none;
    }

    .discussion-mobile-tools {
      position: sticky;
      top: 4.4rem;
      z-index: 5;
      grid-column: 1 / -1;
      display: flex;
      gap: 0.45rem;
      align-items: center;
      justify-content: flex-end;
      border: 1px solid var(--sys-purple-line);
      border-radius: 999px;
      background: rgba(255, 250, 254, 0.9);
      box-shadow: 0 10px 28px rgba(180, 80, 106, 0.14);
      padding: 0.45rem;
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
  }

  @media (max-width: 900px) {
    .discussion-manage-layout,
    .discussion-detail-layout {
      grid-template-columns: 1fr;
    }

    .discussion-manage-grid,
    .discussion-manage-row {
      grid-template-columns: 1fr;
    }

    .discussion-mobile-tools {
      justify-content: center;
      top: 0.75rem;
    }

    .discussion-message-window {
      grid-template-columns: 1fr;
    }

    .discussion-message-sidebar {
      border-right: 0;
      border-bottom: 1px solid rgba(111, 85, 242, 0.16);
    }
  }