/* ═══════════════════════════════════════════════════════════════════════
   USsoft Developer Lounge — Global Styles
   Design language: Industrial / Cyberpunk Dark
   Fonts: Rajdhani (heading) / Noto Sans JP (body) / JetBrains Mono (code)
═══════════════════════════════════════════════════════════════════════ */

/* ──────────────────── CSS Custom Properties ──────────────────── */
:root {
    /* Backgrounds */
    --dl-bg-0: #070d1c; /* deepest background */
    --dl-bg-1: #0c1426; /* surface */
    --dl-bg-2: #111d35; /* elevated surface */
    --dl-bg-3: #172340; /* card / panel */
    --dl-bg-hover: #1c2c4e; /* hover */
    --dl-bg-active: #1f3257; /* active / selected */
    /* Borders */
    --dl-border: rgba(0, 212, 255, 0.10);
    --dl-border-strong: rgba(0, 212, 255, 0.20);
    --dl-border-accent: rgba(0, 212, 255, 0.45);
    /* Accent colors */
    --dl-cyan: #00d4ff;
    --dl-cyan-dim: #008fa8;
    --dl-orange: #ff7b2c;
    --dl-green: #00e676;
    --dl-amber: #ffd740;
    --dl-red: #ff3d71;
    --dl-purple: #ce93d8;
    --dl-teal: #80cbc4;
    /* Text */
    --dl-text: #dce8f8;
    --dl-text-dim: #7a9ac4;
    --dl-text-muted: #8daac2;
/*    --dl-text-muted: #3d5a82;*/
    --dl-text-code: #7dd3fc;
    --dl-text-heading: #e8f4ff;
    /* Typography */
    --font-heading: 'Rajdhani', 'Noto Sans JP', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
    /* Spacing */
    --topbar-h: 52px;
    /* Shadows */
    --dl-glow-cyan: 0 0 12px rgba(0, 212, 255, 0.35);
    --dl-glow-orange: 0 0 12px rgba(255, 123, 44, 0.35);
}

/* ──────────────────── Reset & Base ──────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    height: 100%;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--dl-bg-0);
    color: var(--dl-text);
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.6;
}

/* ──────────────────── App Shell ──────────────────── */
.dl-app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background:
        radial-gradient(ellipse 80% 60% at 20% 0%, rgba(0, 212, 255, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(255, 123, 44, 0.03) 0%, transparent 60%),
        var(--dl-bg-0);
}

/* Grid dot pattern overlay */
.dl-app::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image: radial-gradient(circle, rgba(0, 212, 255, 0.045) 1px, transparent 1px);
    background-size: 28px 28px;
}

.dl-body {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0;
    position: relative;
    z-index: 1;
}

/* ──────────────────── Top Bar ──────────────────── */
.dl-topbar {
    height: var(--topbar-h);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
    background: rgba(10, 18, 36, 0.96);
    border-bottom: 1px solid var(--dl-border-strong);
    box-shadow: 0 1px 0 rgba(0, 212, 255, 0.08);
    position: relative;
    z-index: 10;
    backdrop-filter: blur(12px);
}

/* Cyan scan line animation */
.dl-topbar::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%, var(--dl-cyan) 40%, var(--dl-cyan) 60%, transparent 100%);
    opacity: 0.4;
    animation: dl-scanline 6s ease-in-out infinite;
}

@keyframes dl-scanline {
    0%, 100% { transform: scaleX(0.2) translateX(-200%); opacity: 0; }
    50%       { transform: scaleX(1)   translateX(0);     opacity: 0.5; }
}

.dl-topbar-sep {
    width: 1px;
    height: 28px;
    background: var(--dl-border-strong);
    flex-shrink: 0;
}

.dl-topbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.dl-logo {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    filter: drop-shadow(0 0 6px rgba(0, 212, 255, 0.5));
}

.dl-logo svg { width: 100%; height: 100%; }

.dl-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.dl-brand-name {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 700;
    color: var(--dl-text-heading);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.dl-brand-sub {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--dl-cyan);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    opacity: 0.85;
}

.dl-topbar-center {
    flex: 1;
    display: flex;
    justify-content: center;
    overflow: hidden;
}

.dl-topbar-tagline {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--dl-text-muted);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dl-topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.dl-user-chip {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 4px 12px 4px 4px;
    border-radius: 24px;
    border: 1px solid var(--dl-border);
    background: var(--dl-bg-2);
    cursor: default;
    transition: border-color 0.2s;
}

.dl-user-chip:hover { border-color: var(--dl-border-strong); }

.dl-user-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--dl-cyan-dim), var(--dl-cyan));
    color: var(--dl-bg-0);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

.dl-user-info {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.dl-user-name {
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 500;
    color: var(--dl-text);
}

.dl-user-role {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--dl-text-muted);
    letter-spacing: 0.08em;
}

.dl-user-badge {
    font-family: var(--font-mono);
    font-size: 9px;
    padding: 2px 5px;
    border-radius: 3px;
    background: rgba(255, 215, 64, 0.12);
    color: var(--dl-amber);
    border: 1px solid rgba(255, 215, 64, 0.25);
    letter-spacing: 0.08em;
}

/* ──────────────────── Editor Page Layout ──────────────────── */
.dl-editor-page {
    display: flex;
    height: 100%;
    overflow: hidden;
    position: relative;
}

/* ──────────────────── Tree Panel ──────────────────── */
.dl-tree-panel {
    width: 272px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    background: var(--dl-bg-1);
    border-right: 1px solid var(--dl-border);
    overflow: hidden;
    transition: width 0.22s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 2;
}

.dl-tree-panel.collapsed { width: 42px; }

.dl-tree-panel-header {
    height: 40px;
    display: flex;
    align-items: center;
    padding: 0 8px 0 12px;
    gap: 8px;
    border-bottom: 1px solid var(--dl-border);
    flex-shrink: 0;
    background: var(--dl-bg-2);
}

.dl-tree-panel-title {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--dl-text-muted);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
}

.dl-tree-scroll {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 6px 0;
}

.dl-tree-scroll::-webkit-scrollbar { width: 4px; }
.dl-tree-scroll::-webkit-scrollbar-track { background: transparent; }
.dl-tree-scroll::-webkit-scrollbar-thumb {
    background: var(--dl-border-strong);
    border-radius: 2px;
}

/* ── Tree Items ── */
.dl-tree-project { padding: 2px 0; }

.dl-tree-item {
    display: flex;
    align-items: center;
    padding: 5px 8px 5px 10px;
    gap: 5px;
    cursor: pointer;
    user-select: none;
    position: relative;
    transition: background 0.12s;
    border-left: 2px solid transparent;
    white-space: nowrap;
    overflow: hidden;
}

.dl-tree-item:hover { background: var(--dl-bg-hover); }

.dl-tree-chevron {
    font-size: 12px;
    color: var(--dl-text-muted);
    width: 14px;
    flex-shrink: 0;
    transition: transform 0.18s;
}

.dl-tree-item.expanded > .dl-tree-chevron { transform: rotate(90deg); }

.dl-tree-item-label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 13px;
}

/* Project level */
.dl-tree-project-row {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--dl-text-heading);
    padding-left: 10px;
}

.dl-tree-project-row .dl-tree-chevron { color: var(--dl-cyan-dim); }

/* Subsystem level */
.dl-tree-subsystem-container { padding-left: 14px; }

.dl-tree-subsystem-row {
    font-size: 12px;
    color: var(--dl-text-dim);
    padding-left: 10px;
}

/* Document level */
.dl-tree-docs-container { padding-left: 28px; }

.dl-tree-doc-row {
    gap: 7px;
    padding: 4px 8px 4px 10px;
    font-size: 12px;
    color: var(--dl-text-dim);
}

.dl-tree-doc-row:hover {
    background: var(--dl-bg-hover);
    color: var(--dl-text);
}

.dl-tree-doc-row.selected {
    background: var(--dl-bg-active);
    border-left-color: var(--dl-cyan);
    color: var(--dl-text);
    box-shadow: inset 3px 0 10px rgba(0, 212, 255, 0.08);
}

.dl-tree-doc-row.selected .dl-cat-tag { box-shadow: none; }

/* Category tags */
.dl-cat-tag {
    display: inline-block;
    padding: 1px 5px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.06em;
    white-space: nowrap;
    flex-shrink: 0;
}

.cat-screen { background: rgba(0, 212, 255, 0.12); color: #00d4ff; border: 1px solid rgba(0, 212, 255, 0.25); }
.cat-spec   { background: rgba(0, 230, 118, 0.12); color: #00e676; border: 1px solid rgba(0, 230, 118, 0.25); }
.cat-api    { background: rgba(255, 152, 0, 0.12);  color: #ff9800; border: 1px solid rgba(255, 152, 0, 0.25); }
.cat-report { background: rgba(206, 147, 216, 0.12);color: #ce93d8; border: 1px solid rgba(206, 147, 216, 0.25); }
.cat-db     { background: rgba(128, 203, 196, 0.12);color: #80cbc4; border: 1px solid rgba(128, 203, 196, 0.25); }
.cat-default{ background: rgba(120, 140, 160, 0.12);color: #8090a0; border: 1px solid rgba(120, 140, 160, 0.25); }

/* ──────────────────── Editor Main ──────────────────── */
.dl-editor-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* ── Toolbar ── */
.dl-editor-toolbar {
    height: 42px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding: 0 10px;
    gap: 4px;
    background: var(--dl-bg-2);
    border-bottom: 1px solid var(--dl-border);
}

.dl-toolbar-breadcrumb {
    display: flex;
    align-items: center;
    gap: 5px;
    flex: 1;
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--dl-text-dim);
    white-space: nowrap;
}

.dl-breadcrumb-sep { color: var(--dl-text-muted); }

.dl-breadcrumb-title {
    color: var(--dl-text);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dl-toolbar-hint {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--dl-text-muted);
    letter-spacing: 0.05em;
}

.dl-toolbar-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.dl-toolbar-div {
    width: 1px;
    height: 20px;
    background: var(--dl-border);
    margin: 0 4px;
}

/* ── Buttons ── */
.dl-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid var(--dl-border);
    background: transparent;
    color: var(--dl-text-dim);
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
    line-height: 1;
}

.dl-btn .material-icons { font-size: 15px; }

.dl-btn:hover:not(:disabled) {
    background: var(--dl-bg-hover);
    border-color: var(--dl-border-strong);
    color: var(--dl-text);
}

.dl-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.dl-btn-icon {
    padding: 5px;
    width: 30px;
    height: 30px;
    justify-content: center;
}

.dl-btn-primary {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.35);
    color: var(--dl-cyan);
}

.dl-btn-primary:hover:not(:disabled) {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--dl-cyan);
    box-shadow: var(--dl-glow-cyan);
    color: var(--dl-cyan);
}

.dl-btn-secondary {
    background: rgba(255, 123, 44, 0.08);
    border-color: rgba(255, 123, 44, 0.3);
    color: var(--dl-orange);
}

.dl-btn-secondary:hover:not(:disabled) {
    background: rgba(255, 123, 44, 0.15);
    border-color: var(--dl-orange);
    box-shadow: var(--dl-glow-orange);
}

.dl-btn-ghost {
    border-color: transparent;
}

.dl-btn-ghost:hover:not(:disabled) {
    background: var(--dl-bg-hover);
    border-color: var(--dl-border);
}

.dl-btn-active {
    background: rgba(0, 212, 255, 0.12) !important;
    border-color: rgba(0, 212, 255, 0.4) !important;
    color: var(--dl-cyan) !important;
}

/* ── View mode toggle ── */
.dl-view-mode-group {
    display: flex;
    align-items: center;
    border: 1px solid var(--dl-border);
    border-radius: 4px;
    overflow: hidden;
}

.dl-view-mode-group .dl-btn {
    border: none;
    border-radius: 0;
    border-right: 1px solid var(--dl-border);
}

.dl-view-mode-group .dl-btn:last-child { border-right: none; }

/* ── Editor content area ── */
.dl-editor-content {
    flex: 1;
    display: flex;
    overflow: hidden;
    min-height: 0;
}

.dl-editor-pane {
    flex: 1;
    overflow: hidden;
    border-right: 1px solid var(--dl-border);
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.dl-preview-pane {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    min-width: 0;
    background: #ffffff;
}

.dl-preview-pane::-webkit-scrollbar { width: 6px; }
.dl-preview-pane::-webkit-scrollbar-track { background: #f0f4f8; }
.dl-preview-pane::-webkit-scrollbar-thumb {
    background: #b0c4d8;
    border-radius: 3px;
}

/* View mode classes */
.dl-editor-content.mode-editor .dl-preview-pane { display: none; }
.dl-editor-content.mode-editor .dl-editor-pane { flex: 1; }

.dl-editor-content.mode-preview .dl-editor-pane { display: none; }
.dl-editor-content.mode-preview .dl-preview-pane { flex: 1; }

/* Monaco editor fill */
.dl-monaco { height: 100%; }

#dl-md-editor {
    height: 100%;
    width: 100%;
}

/* ── Empty state ── */
.dl-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 12px;
    color: var(--dl-text-muted);
    pointer-events: none;
}

.dl-empty-icon { font-size: 40px !important; opacity: 0.3; }

.dl-empty-state p {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
}

/* ── Markdown Toolbar（DocumentEdit / MarkdownEditor 共通） ───────────── */
.dce-md-toolbar {
    display: flex;
    align-items: center;
    padding: 4px 12px;
    gap: 2px;
    background: var(--dl-bg-1);
    border-bottom: 1px solid var(--dl-border);
    flex-shrink: 0;
    flex-wrap: wrap;
}
.dce-tb-group {
    display: flex;
    align-items: center;
    gap: 1px;
}
.dce-tb-sep {
    width: 1px;
    height: 18px;
    background: var(--dl-border);
    margin: 0 5px;
    flex-shrink: 0;
}
.dce-tb-spacer { flex: 1; }
.dce-tb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 26px;
    padding: 0;
    border: none;
    border-radius: 3px;
    background: transparent;
    color: var(--dl-text-muted);
    cursor: pointer;
    transition: background .12s, color .12s;
    flex-shrink: 0;
}
.dce-tb-btn .material-icons { font-size: 16px !important; }
.dce-tb-btn .dce-tb-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: -.5px;
}
.dce-tb-btn:hover:not(:disabled) {
    background: var(--dl-bg-2);
    color: var(--dl-cyan);
}
.dce-tb-btn.active {
    background: rgba(0, 212, 255, .12);
    color: var(--dl-cyan);
}
.dce-tb-btn:disabled {
    opacity: .3;
    cursor: not-allowed;
}

/* ── Mermaid ドロップダウン ─────────────────────────────────────────── */
.dce-mermaid-wrap {
    position: relative;
}

.dce-mermaid-trigger {
    gap: 0;
    padding: 0 6px;
}

.dce-mermaid-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    z-index: 200;
    background: var(--dl-bg-3);
    border: 1px solid var(--dl-border-strong);
    border-radius: 6px;
    padding: 4px;
    min-width: 170px;
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 212, 255, 0.06);
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.dce-mermaid-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    background: none;
    border: none;
    border-radius: 4px;
    color: var(--dl-text);
    font-family: var(--font-body);
    font-size: 12px;
    cursor: pointer;
    text-align: left;
    transition: background .1s, color .1s;
    white-space: nowrap;
}

.dce-mermaid-item .material-icons {
    font-size: 15px;
    color: var(--dl-cyan);
    flex-shrink: 0;
}

.dce-mermaid-item:hover {
    background: var(--dl-bg-hover);
    color: var(--dl-cyan);
}


/* ── Mermaid 図表レンダリング領域 ──────────────────────────────────── */
/* Markdig の UseDiagrams() は <pre class="mermaid"> を出力する。
   コードブロック用スタイルを上書きして図表向けに整える。
   プレビューペインは白背景 → Mermaid 標準ライトテーマ（'default'）使用。 */
.dl-markdown-body pre.mermaid {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 16px;
    overflow-x: auto;
    background: #fafbfc;
    border: 1px solid #d0dce8;
    border-left: 1px solid #d0dce8; /* コードブロックの左ストライプを上書き */
    border-radius: 6px;
    /* font-size が大きいと SVG 生成前のテキストが目立つため最小化 */
    font-size: 0;
}

/* mermaid が SVG を挿入した後 */
.dl-markdown-body pre.mermaid[data-processed] {
    font-size: 0; /* テキストノードを隠す（念のため） */
}

.dl-markdown-body pre.mermaid svg {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 2px;
}

/* ── Status bar ── */
.dl-status-bar {
    height: 26px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding: 0 10px;
    gap: 0;
    background: var(--dl-bg-2);
    border-top: 1px solid var(--dl-border);
    font-family: var(--font-mono);
    font-size: 11px;
    overflow: hidden;
}

.dl-status-item {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0 10px;
    color: var(--dl-text-muted);
    border-right: 1px solid var(--dl-border);
    white-space: nowrap;
    flex-shrink: 0;
}

.dl-status-item:first-child { padding-left: 0; }
.dl-status-item:last-child  { border-right: none; }

.dl-status-icon { font-size: 13px !important; }

.dl-status-saved { color: var(--dl-green); }
.dl-status-dirty { color: var(--dl-amber); }
.dl-status-spacer { flex: 1; }

/* ──────────────────── Markdown Preview Styles ──────────────────── */
.dl-preview-content {
    padding: 28px 32px;
    max-width: 900px;
    animation: dl-fade-in 0.15s ease;
}

@keyframes dl-fade-in {
    from { opacity: 0; transform: translateY(3px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Markdown プレビュー本文（白背景向け配色） ────────────────────────── */
.dl-markdown-body {
    color: #2d3748;
}

.dl-markdown-body h1,
.dl-markdown-body h2,
.dl-markdown-body h3,
.dl-markdown-body h4,
.dl-markdown-body h5,
.dl-markdown-body h6 {
    font-family: var(--font-heading);
    color: #0d1b2e;
    margin: 1.5em 0 0.5em;
    font-weight: 600;
    letter-spacing: 0.03em;
    line-height: 1.3;
}

.dl-markdown-body h1 {
    font-size: 26px;
    font-weight: 700;
    border-bottom: 2px solid #1a4a6e;
    padding-bottom: 10px;
    color: #0d2d4a;
    margin-top: 0.5em;
}

.dl-markdown-body h2 {
    font-size: 20px;
    border-bottom: 1px solid #c8d8e8;
    padding-bottom: 6px;
    color: #12345a;
}

.dl-markdown-body h3 { font-size: 16px; color: #1a4878; }
.dl-markdown-body h4 { font-size: 14px; color: #4a6a8a; }
.dl-markdown-body h5 { font-size: 13px; color: #5a7a9a; }
.dl-markdown-body h6 { font-size: 12px; color: #6a8aa8; }

.dl-markdown-body p {
    margin: 0.75em 0;
    color: #2d3748;
    line-height: 1.8;
}

.dl-markdown-body a { color: #0069a8; text-decoration: underline; }
.dl-markdown-body a:hover { color: #004d80; }

.dl-markdown-body strong { color: #0d1b2e; font-weight: 700; }
.dl-markdown-body em     { color: #4a6070; font-style: italic; }

.dl-markdown-body code {
    font-family: var(--font-mono);
    font-size: 12px;
    background: #eef3f8;
    color: #0d3b6a;
    padding: 2px 6px;
    border-radius: 3px;
    border: 1px solid #c0d4e8;
}

.dl-markdown-body pre {
    background: #f5f8fc;
    border: 1px solid #c8d8e8;
    border-left: 3px solid #3a7fa8;
    border-radius: 4px;
    padding: 14px 16px;
    overflow-x: auto;
    margin: 1em 0;
}

.dl-markdown-body pre code {
    background: none;
    border: none;
    padding: 0;
    color: #1a2d42;
    font-size: 12px;
    line-height: 1.6;
}

.dl-markdown-body pre::-webkit-scrollbar { height: 4px; }
.dl-markdown-body pre::-webkit-scrollbar-thumb { background: #b0c4d8; }

.dl-markdown-body table {
    border-collapse: collapse;
    width: 100%;
    margin: 1em 0;
    font-size: 13px;
}

.dl-markdown-body th {
    background: #dae6f2;
    color: #0d2d4a;
    font-family: var(--font-heading);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 8px 12px;
    border: 1px solid #b0c8e0;
    text-align: left;
}

.dl-markdown-body td {
    padding: 7px 12px;
    border: 1px solid #d0dce8;
    color: #2d3748;
    vertical-align: top;
    line-height: 1.5;
}

.dl-markdown-body tr:nth-child(even) td { background: #f0f5fa; }
.dl-markdown-body tr:hover td { background: #e4eef8; }

.dl-markdown-body ul,
.dl-markdown-body ol {
    margin: 0.5em 0 0.5em 1.6em;
    color: #2d3748;
}

.dl-markdown-body li { margin: 0.25em 0; line-height: 1.6; }

.dl-markdown-body blockquote {
    border-left: 3px solid #e07020;
    margin: 1em 0;
    padding: 8px 16px;
    background: #fff6ee;
    border-radius: 0 4px 4px 0;
    color: #5a3a1a;
}

.dl-markdown-body hr {
    border: none;
    border-top: 1px solid #c8d8e8;
    margin: 1.5em 0;
}

/* ──────────────────── Version History Panel ──────────────────── */
.dl-history-panel {
    position: fixed;
    top: var(--topbar-h);
    right: 0;
    width: 300px;
    height: calc(100vh - var(--topbar-h));
    background: var(--dl-bg-2);
    border-left: 1px solid var(--dl-border-strong);
    z-index: 50;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.5);
}

.dl-history-panel.open { transform: translateX(0); }

.dl-panel-header {
    height: 44px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    gap: 8px;
    border-bottom: 1px solid var(--dl-border);
    flex-shrink: 0;
    background: var(--dl-bg-1);
}

.dl-panel-header-title {
    flex: 1;
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dl-text-dim);
}

.dl-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.dl-panel-body::-webkit-scrollbar { width: 4px; }
.dl-panel-body::-webkit-scrollbar-thumb {
    background: var(--dl-border-strong);
    border-radius: 2px;
}

.dl-version-item {
    padding: 10px 14px;
    border-bottom: 1px solid var(--dl-border);
    cursor: pointer;
    transition: background 0.12s;
}

.dl-version-item:hover { background: var(--dl-bg-hover); }
.dl-version-item.current { border-left: 3px solid var(--dl-cyan); }

.dl-version-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 3px;
}

.dl-version-badge {
    font-family: var(--font-mono);
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 3px;
    background: var(--dl-bg-3);
    color: var(--dl-text-dim);
    border: 1px solid var(--dl-border);
}

.dl-version-item.current .dl-version-badge {
    background: rgba(0, 212, 255, 0.12);
    color: var(--dl-cyan);
    border-color: rgba(0, 212, 255, 0.3);
}

.dl-version-current-label {
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--dl-cyan);
    letter-spacing: 0.08em;
}

.dl-version-meta {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--dl-text-muted);
    display: flex;
    gap: 8px;
}

.dl-panel-footer {
    padding: 10px 14px;
    border-top: 1px solid var(--dl-border);
    flex-shrink: 0;
}

/* ──────────────────── Export Dialog ──────────────────── */
.dl-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(7, 13, 28, 0.8);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: dl-backdrop-in 0.15s ease;
}

@keyframes dl-backdrop-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.dl-modal {
    background: var(--dl-bg-2);
    border: 1px solid var(--dl-border-strong);
    border-radius: 8px;
    padding: 24px;
    width: 440px;
    max-width: calc(100vw - 32px);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(0, 212, 255, 0.06);
    animation: dl-modal-in 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes dl-modal-in {
    from { opacity: 0; transform: scale(0.94) translateY(-8px); }
    to   { opacity: 1; transform: scale(1)    translateY(0); }
}

.dl-modal-title {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dl-text-heading);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.dl-modal-title .material-icons { color: var(--dl-orange); font-size: 20px !important; }

.dl-modal-section { margin-bottom: 18px; }

.dl-modal-section-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--dl-text-muted);
    margin-bottom: 8px;
    display: block;
}

.dl-radio-group { display: flex; flex-direction: column; gap: 6px; }

.dl-radio-option {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 8px 12px;
    border-radius: 5px;
    border: 1px solid var(--dl-border);
    cursor: pointer;
    transition: all 0.15s;
    background: var(--dl-bg-1);
}

.dl-radio-option:hover { border-color: var(--dl-border-strong); background: var(--dl-bg-hover); }

.dl-radio-option.selected {
    border-color: rgba(0, 212, 255, 0.4);
    background: rgba(0, 212, 255, 0.07);
}

.dl-radio-option.disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.dl-radio-circle {
    width: 14px; height: 14px;
    border-radius: 50%;
    border: 2px solid var(--dl-border-strong);
    flex-shrink: 0;
    transition: all 0.15s;
    position: relative;
}

.dl-radio-option.selected .dl-radio-circle {
    border-color: var(--dl-cyan);
    background: var(--dl-cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.2);
}

.dl-radio-option.selected .dl-radio-circle::after {
    content: '';
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background: var(--dl-bg-0);
}

.dl-radio-label {
    flex: 1;
    font-size: 13px;
    color: var(--dl-text);
}

.dl-radio-badge {
    font-family: var(--font-mono);
    font-size: 9px;
    padding: 1px 5px;
    border-radius: 2px;
    background: var(--dl-bg-0);
    color: var(--dl-text-muted);
    border: 1px solid var(--dl-border);
}

.dl-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--dl-border);
}

/* ──────────────────── Toast Notification ──────────────────── */
.dl-toast-container {
    position: fixed;
    top: calc(var(--topbar-h) + 12px);
    right: 16px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.dl-toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: 6px;
    background: var(--dl-bg-3);
    border: 1px solid var(--dl-border-strong);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    font-size: 13px;
    min-width: 200px;
    animation: dl-toast-in 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: none;
}

@keyframes dl-toast-in {
    from { opacity: 0; transform: translateX(20px) scale(0.95); }
    to   { opacity: 1; transform: translateX(0)    scale(1); }
}

.dl-toast.success { border-color: rgba(0, 230, 118, 0.4); }
.dl-toast.success .material-icons { color: var(--dl-green); font-size: 16px !important; }

.dl-toast.error { border-color: rgba(255, 61, 113, 0.4); }
.dl-toast.error .material-icons { color: var(--dl-red); font-size: 16px !important; }

/* ──────────────────── Blazor Error UI ──────────────────── */
#blazor-error-ui {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 8px 16px;
    background: rgba(255, 61, 113, 0.15);
    border-top: 1px solid var(--dl-red);
    color: var(--dl-text);
    font-size: 13px;
    z-index: 1000;
    backdrop-filter: blur(8px);
}

#blazor-error-ui .reload {
    color: var(--dl-cyan);
    text-decoration: underline;
    cursor: pointer;
    margin-left: 8px;
}

#blazor-error-ui .dismiss {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--dl-text-muted);
}

/* ──────────────────── Utility ──────────────────── */
.material-icons {
    font-size: 18px !important;
    user-select: none;
    vertical-align: middle;
    line-height: 1;
}

.visually-hidden {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
}

/* Scrollbar global */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--dl-border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0, 212, 255, 0.3); }

/* ──────────────────── Responsive ──────────────────── */
@media (max-width: 768px) {
    .dl-tree-panel { width: 0; }
    .dl-topbar-tagline { display: none; }
    .dl-topbar-center { display: none; }
}