/* ==========================================================================
   BIMUsers Community Forum Frontend Stylesheet
   CSS Code Formatting Standard: Single-Line Row Format for every CSS rule
   ========================================================================== */
:root { --bimusers-primary: #2563eb; --bimusers-primary-hover: #1d4ed8; --bimusers-primary-light: #eff6ff; --bimusers-bg: #f8fafc; --bimusers-surface: #ffffff; --bimusers-border: #e2e8f0; --bimusers-text: #0f172a; --bimusers-muted: #64748b; --bimusers-success: #10b981; --bimusers-danger: #ef4444; --bimusers-warning: #f59e0b; --bimusers-radius: 14px; --bimusers-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05); }
.bimusers-forum-app { font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: var(--bimusers-text); background-color: var(--bimusers-bg); line-height: 1.5; padding: 18px 0 60px; max-width: 1280px; margin: 0 auto; box-sizing: border-box; container-type: inline-size; container-name: buForum; }
.bimusers-forum-app * { box-sizing: border-box; }
.bu-forum-hero { background: linear-gradient(135deg, #0b0f19 0%, #0f172a 100%); border-radius: 20px; padding: 42px 28px; color: #ffffff; text-align: center; margin-bottom: 24px; position: relative; overflow: visible; z-index: 50; box-shadow: 0 10px 30px rgba(15, 23, 42, 0.15); }
.bu-hero-tag { display: inline-block; font-size: 0.76rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: #38bdf8; background: rgba(56, 189, 248, 0.12); padding: 4px 12px; border-radius: 9999px; border: 1px solid rgba(56, 189, 248, 0.25); margin-bottom: 12px; }
.bu-hero-title { font-size: 2.4rem; font-weight: 800; line-height: 1.15; margin: 0 0 8px; color: #ffffff; }
.bu-hero-title .gradient-text { background: linear-gradient(135deg, #38bdf8 0%, #2563eb 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.bu-hero-subtitle { font-size: 1.05rem; color: #94a3b8; margin: 0 0 26px; }
.bu-search-wrapper { position: relative; max-width: 680px; margin: 0 auto; z-index: 100; }
.bu-search-bar { display: flex; align-items: center; background: #ffffff; border-radius: 14px; padding: 6px 14px; box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25); position: relative; z-index: 101; }
.bu-search-bar .search-icon { color: #64748b; margin-right: 10px; display: flex; align-items: center; }
.bu-search-input { width: 100%; border: none; outline: none; font-size: 0.98rem; color: #0f172a; font-family: inherit; background: transparent; padding: 8px 0; }
.bu-clear-search-btn { background: none; border: none; font-size: 1.3rem; color: #94a3b8; cursor: pointer; padding: 0 6px; }
.bu-software-nav-wrap { margin-bottom: 24px; position: sticky; top: 0; z-index: 30; background: var(--bimusers-bg); padding: 6px 0; }
.bu-software-nav { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.bu-software-nav::-webkit-scrollbar { display: none; }
.bu-cat-tab { display: inline-flex; align-items: center; gap: 7px; padding: 8px 14px; background: var(--bimusers-surface); border: 1px solid var(--bimusers-border); border-radius: 10px; font-size: 0.85rem; font-weight: 600; color: var(--bimusers-muted); cursor: pointer; white-space: nowrap; transition: all 0.2s ease; }
.bu-cat-tab:hover { border-color: var(--bimusers-primary); color: var(--bimusers-primary); transform: translateY(-1px); }
.bu-cat-tab.active { background: var(--bimusers-primary); color: #ffffff; border-color: var(--bimusers-primary-hover); box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25); }
.bu-cat-tab .cat-badge { font-size: 0.72rem; padding: 1px 6px; border-radius: 999px; background: rgba(0,0,0,0.06); }
.bu-cat-tab.active .cat-badge { background: rgba(255,255,255,0.25); color: #ffffff; }
.bu-forum-layout-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 24px; }
.bu-filter-strip { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }
.bu-sort-tabs { display: flex; gap: 6px; background: var(--bimusers-surface); padding: 4px; border: 1px solid var(--bimusers-border); border-radius: 10px; }
.bu-sort-btn { background: none; border: none; padding: 6px 12px; font-size: 0.82rem; font-weight: 600; color: var(--bimusers-muted); border-radius: 6px; cursor: pointer; }
.bu-sort-btn.active { background: var(--bimusers-primary); color: #ffffff; }
.bu-primary-btn { display: inline-flex; align-items: center; gap: 6px; background: var(--bimusers-primary); color: #ffffff; border: none; padding: 9px 18px; border-radius: 10px; font-weight: 600; font-size: 0.88rem; cursor: pointer; text-decoration: none; transition: all 0.2s ease; box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25); }
.bu-primary-btn:hover { background: var(--bimusers-primary-hover); transform: translateY(-1px); color: #ffffff; }
.bu-subtle-btn { background: #f1f5f9; color: #475569; border: 1px solid #cbd5e1; padding: 8px 16px; border-radius: 10px; font-weight: 600; font-size: 0.85rem; cursor: pointer; }
.bu-subtle-btn:hover { background: #e2e8f0; }
.bu-topic-card { display: flex; gap: 16px; background: var(--bimusers-surface); border: 1px solid var(--bimusers-border); border-radius: var(--bimusers-radius); padding: 18px; margin-bottom: 12px; box-shadow: var(--bimusers-shadow); transition: border-color 0.2s ease; }
.bu-topic-card:hover { border-color: #cbd5e1; }
.bu-topic-card.is-pinned { border-left: 4px solid var(--bimusers-primary); }
.bu-topic-card.is-solved { border-left: 4px solid var(--bimusers-success); }
.bu-topic-left-vote { display: flex; flex-direction: column; align-items: center; }
.bu-vote-btn { background: #f8fafc; border: 1px solid var(--bimusers-border); border-radius: 8px; width: 44px; height: 50px; display: flex; flex-direction: column; align-items: center; justify-content: center; cursor: pointer; transition: all 0.15s ease; color: var(--bimusers-muted); }
.bu-vote-btn:hover { border-color: var(--bimusers-primary); color: var(--bimusers-primary); background: #eff6ff; }
.bu-vote-btn.voted { background: #eff6ff; border-color: var(--bimusers-primary); color: var(--bimusers-primary); font-weight: 700; }
.bu-vote-btn .vote-count { font-size: 0.82rem; font-weight: 700; margin-top: -2px; }
.bu-topic-body { flex: 1; min-width: 0; }
.bu-topic-badges { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 6px; }
.bu-pill-badge { font-size: 0.72rem; font-weight: 700; padding: 2px 8px; border-radius: 4px; display: inline-flex; align-items: center; gap: 4px; }
.bu-pill-badge.solved { background: #dcfce7; color: #166534; }
.bu-pill-badge.pinned { background: #eff6ff; color: #1e40af; }
.bu-pill-badge.trending { background: #fff7ed; color: #9a3412; }
.bu-pill-badge.locked { background: #fee2e2; color: #991b1b; }
.bu-pill-badge.cat { background: #f1f5f9; color: #334155; border-left: 3px solid var(--bimusers-primary); text-decoration: none; }
.bu-pill-badge.software { background: #e0f2fe; color: #0369a1; }
.bu-topic-title { font-size: 1.05rem; font-weight: 700; line-height: 1.35; margin: 0 0 8px; }
.bu-topic-title a { color: var(--bimusers-text); text-decoration: none; }
.bu-topic-title a:hover { color: var(--bimusers-primary); }
.bu-topic-tags { display: flex; gap: 5px; flex-wrap: wrap; margin-bottom: 12px; }
.bu-tag-chip { font-size: 0.74rem; font-weight: 600; color: var(--bimusers-muted); background: #f1f5f9; padding: 2px 7px; border-radius: 4px; text-decoration: none; }
.bu-tag-chip:hover { background: #e2e8f0; color: #0f172a; }
.bu-topic-footer { display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; color: var(--bimusers-muted); }
.bu-topic-author { display: flex; align-items: center; gap: 6px; }
.author-avatar { border-radius: 50%; }
.author-name { font-weight: 600; color: #334155; text-decoration: none; }
.author-name:hover { color: var(--bimusers-primary); }
.bu-topic-stats { display: flex; gap: 12px; }
.stat-pill { display: inline-flex; align-items: center; gap: 4px; }
.bu-forum-pagination { display: flex; justify-content: center; align-items: center; gap: 14px; margin-top: 24px; }
.bu-pagi-btn { background: var(--bimusers-surface); border: 1px solid var(--bimusers-border); padding: 7px 16px; border-radius: 8px; font-weight: 600; font-size: 0.84rem; cursor: pointer; }
.bu-pagi-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.bu-forum-sidebar { display: flex; flex-direction: column; gap: 18px; }
.bu-sidebar-card { background: var(--bimusers-surface); border: 1px solid var(--bimusers-border); border-radius: var(--bimusers-radius); padding: 18px; box-shadow: var(--bimusers-shadow); }
.sidebar-title { font-size: 0.95rem; font-weight: 700; color: var(--bimusers-text); margin: 0 0 14px; display: flex; align-items: center; gap: 8px; border-bottom: 1px solid #f1f5f9; padding-bottom: 8px; }
.bu-stat-pills-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat-pill-box { background: #f8fafc; border: 1px solid var(--bimusers-border); border-radius: 8px; padding: 10px; text-align: center; }
.stat-pill-box.solved-pill { background: #f0fdf4; border-color: #bbf7d0; }
.stat-pill-box .stat-num { display: block; font-size: 1.25rem; font-weight: 800; color: var(--bimusers-text); }
.stat-pill-box.solved-pill .stat-num { color: #166534; }
.stat-pill-box .stat-lbl { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; color: var(--bimusers-muted); }
.bu-popular-tags-cloud { display: flex; gap: 6px; flex-wrap: wrap; }
.bu-popular-tags-cloud .bu-tag-chip { font-size: 0.78rem; padding: 4px 9px; }
.bu-top-contributors-list { display: flex; flex-direction: column; gap: 10px; }
.contributor-item { display: flex; align-items: center; gap: 10px; }
.contributor-avatar { border-radius: 50%; }
.contributor-name { display: block; font-size: 0.85rem; font-weight: 600; color: #1e293b; text-decoration: none; }
.contributor-solutions { font-size: 0.72rem; color: #166534; font-weight: 600; display: flex; align-items: center; gap: 3px; }
.bu-floating-ask-btn { display: none; position: fixed; bottom: 24px; right: 24px; width: 56px; height: 56px; border-radius: 50%; background: var(--bimusers-primary); color: #ffffff; border: none; box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45); cursor: pointer; z-index: 99; align-items: center; justify-content: center; }
.bu-topic-view-container { max-width: 1000px; margin: 0 auto; }
.bu-forum-breadcrumbs { font-size: 0.85rem; color: var(--bimusers-muted); margin-bottom: 16px; }
.bu-forum-breadcrumbs a { color: var(--bimusers-muted); text-decoration: none; }
.bu-forum-breadcrumbs a:hover { color: var(--bimusers-primary); }
.crumb-separator { margin: 0 6px; }
.crumb-current { color: #0f172a; font-weight: 600; }
.bu-topic-header { background: var(--bimusers-surface); border: 1px solid var(--bimusers-border); border-radius: var(--bimusers-radius); padding: 24px; margin-bottom: 20px; box-shadow: var(--bimusers-shadow); }
.bu-topic-header-badges { display: flex; gap: 8px; margin-bottom: 8px; }
.bu-topic-full-title { font-size: 1.65rem; font-weight: 800; line-height: 1.25; margin: 0 0 16px; color: #0f172a; }
.bu-topic-header-meta { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid #f1f5f9; padding-top: 14px; flex-wrap: wrap; gap: 10px; }
.author-block { display: flex; align-items: center; gap: 10px; }
.author-avatar-lg { border-radius: 50%; }
.author-name-lg { font-size: 0.95rem; font-weight: 700; color: #0f172a; text-decoration: none; display: block; }
.post-date { font-size: 0.78rem; color: var(--bimusers-muted); }
.topic-meta-right { display: flex; align-items: center; gap: 14px; font-size: 0.82rem; color: var(--bimusers-muted); }
.meta-stat { display: inline-flex; align-items: center; gap: 5px; }
.bu-share-btn { background: #f1f5f9; border: 1px solid #e2e8f0; border-radius: 6px; padding: 4px 10px; font-size: 0.78rem; font-weight: 600; cursor: pointer; }
.bu-topic-main-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 24px; }
.bu-post-card { display: flex; gap: 18px; background: var(--bimusers-surface); border: 1px solid var(--bimusers-border); border-radius: var(--bimusers-radius); padding: 22px; margin-bottom: 16px; box-shadow: var(--bimusers-shadow); position: relative; }
.bu-post-card.is-accepted-solution { border: 2px solid var(--bimusers-success); background: #f0fdf4; }
.accepted-solution-banner { position: absolute; top: -13px; left: 24px; background: var(--bimusers-success); color: #ffffff; font-size: 0.72rem; font-weight: 800; letter-spacing: 0.05em; padding: 3px 10px; border-radius: 999px; display: inline-flex; align-items: center; gap: 5px; }
.bu-post-vote-col { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.bu-solution-toggle-btn { background: #ffffff; border: 1px solid #e2e8f0; border-radius: 50%; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: #94a3b8; transition: all 0.2s ease; }
.bu-solution-toggle-btn:hover, .bu-solution-toggle-btn.active { background: var(--bimusers-success); border-color: var(--bimusers-success); color: #ffffff; }
.bu-post-content-col { flex: 1; min-width: 0; }
.bu-technical-context-card { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px; padding: 12px 14px; margin-bottom: 16px; }
.context-header { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; color: #475569; letter-spacing: 0.05em; margin-bottom: 6px; display: flex; align-items: center; gap: 5px; }
.context-grid { display: flex; gap: 14px; flex-wrap: wrap; }
.context-item { font-size: 0.8rem; }
.context-item.full { width: 100%; margin-top: 4px; }
.context-k { font-weight: 600; color: #64748b; margin-right: 4px; }
.context-v { font-weight: 700; color: #0f172a; }
.context-v.error code { background: #fee2e2; color: #991b1b; padding: 2px 6px; border-radius: 4px; font-size: 0.78rem; }
.bu-post-prose { font-size: 0.98rem; line-height: 1.65; color: #1e293b; }
.bu-post-prose pre { background: #0b0f19; color: #f8fafc; padding: 14px; border-radius: 10px; overflow-x: auto; font-family: "Consolas", monospace; font-size: 0.88rem; margin: 14px 0; }
.bu-post-prose code { background: #f1f5f9; color: #0f172a; padding: 2px 5px; border-radius: 4px; font-family: "Consolas", monospace; font-size: 0.88rem; }
.bu-replies-header { margin: 28px 0 14px; }
.bu-replies-header h2 { font-size: 1.25rem; font-weight: 700; color: #0f172a; margin: 0; }
.reply-author-bar { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.reply-author-details { display: flex; align-items: center; gap: 6px; }
.reply-time { font-size: 0.78rem; color: var(--bimusers-muted); }
.bu-empty-replies-box { background: var(--bimusers-surface); border: 1px dashed var(--bimusers-border); border-radius: var(--bimusers-radius); padding: 32px; text-align: center; color: var(--bimusers-muted); }
.bu-reply-composer-card { background: var(--bimusers-surface); border: 1px solid var(--bimusers-border); border-radius: var(--bimusers-radius); padding: 22px; margin-top: 24px; box-shadow: var(--bimusers-shadow); }
.bu-reply-composer-card h3 { font-size: 1.1rem; font-weight: 700; margin: 0 0 12px; }
.composer-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.toolbar-btn { background: #f1f5f9; border: 1px solid #e2e8f0; border-radius: 6px; padding: 4px 10px; font-size: 0.78rem; font-weight: 600; cursor: pointer; display: inline-flex; align-items: center; gap: 4px; }
.bu-reply-composer-card textarea { width: 100%; border: 1px solid var(--bimusers-border); border-radius: 10px; padding: 12px; font-family: inherit; font-size: 0.95rem; resize: vertical; outline: none; }
.bu-reply-composer-card textarea:focus { border-color: var(--bimusers-primary); }
.composer-footer { display: flex; justify-content: flex-end; margin-top: 12px; }
.bu-locked-notice { background: #fee2e2; border: 1px solid #fecaca; color: #991b1b; border-radius: 10px; padding: 14px 18px; margin-top: 24px; font-weight: 600; font-size: 0.9rem; display: flex; align-items: center; gap: 8px; }
.bu-login-to-reply-card { background: #f1f5f9; border-radius: 10px; padding: 20px; text-align: center; margin-top: 24px; font-size: 0.95rem; }
.bu-related-topics-list { list-style: none; margin: 0; padding: 0; }
.bu-related-topics-list li { margin-bottom: 12px; border-bottom: 1px solid #f1f5f9; padding-bottom: 10px; }
.bu-related-topics-list li:last-child { margin-bottom: 0; border-bottom: none; padding-bottom: 0; }
.related-link { display: block; font-size: 0.88rem; font-weight: 600; color: #0f172a; text-decoration: none; line-height: 1.35; margin-bottom: 2px; }
.related-link:hover { color: var(--bimusers-primary); }
.rel-check { color: var(--bimusers-success); font-weight: 800; margin-right: 4px; }
.rel-meta { font-size: 0.72rem; color: var(--bimusers-muted); }
.guidelines-card .guide-text { font-size: 0.82rem; line-height: 1.5; color: var(--bimusers-muted); margin: 0; }
.bu-modal-overlay { position: fixed; inset: 0; background: rgba(15, 23, 42, 0.65); backdrop-filter: blur(4px); z-index: 9999; display: flex; align-items: center; justify-content: center; padding: 18px; }
.bu-modal-container { background: #ffffff; border-radius: 18px; width: 100%; max-width: 680px; max-height: 90vh; overflow-y: auto; box-shadow: 0 25px 60px rgba(0,0,0,0.3); }
.bu-modal-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; border-bottom: 1px solid #f1f5f9; }
.bu-modal-header h2 { font-size: 1.25rem; font-weight: 800; color: #0f172a; margin: 0; }
.bu-modal-close-btn { background: none; border: none; font-size: 1.5rem; color: #94a3b8; cursor: pointer; }
.bu-modal-body { padding: 22px 24px; }
.bu-smart-detect-banner { background: #eff6ff; border: 1px solid #bfdbfe; border-radius: 8px; padding: 10px 14px; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; font-size: 0.82rem; }
.detect-content { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.detect-title { font-weight: 700; color: #1e40af; }
.bu-tiny-btn { background: var(--bimusers-primary); color: #ffffff; border: none; border-radius: 4px; padding: 2px 8px; font-size: 0.74rem; font-weight: 700; cursor: pointer; }
.bu-form-group { margin-bottom: 16px; }
.bu-form-group.flex-1 { flex: 1; margin-bottom: 0; }
.bu-form-row { display: flex; gap: 14px; margin-bottom: 16px; flex-wrap: wrap; }
.bu-form-label { display: block; font-size: 0.85rem; font-weight: 700; color: #334155; margin-bottom: 6px; }
.bu-form-sublabel { display: block; font-size: 0.76rem; font-weight: 600; color: #64748b; margin-bottom: 4px; }
.bu-form-label .req { color: var(--bimusers-danger); }
.bu-form-input, .bu-form-select, .bu-form-textarea { width: 100%; border: 1px solid var(--bimusers-border); border-radius: 10px; padding: 10px 12px; font-family: inherit; font-size: 0.92rem; outline: none; transition: border-color 0.2s ease; }
.bu-form-input.sm { padding: 7px 10px; font-size: 0.84rem; }
.bu-form-input:focus, .bu-form-select:focus, .bu-form-textarea:focus { border-color: var(--bimusers-primary); }
.bu-context-collapsible { background: #f8fafc; border: 1px solid var(--bimusers-border); border-radius: 10px; padding: 10px 14px; margin-bottom: 16px; }
.bu-context-summary { font-size: 0.82rem; font-weight: 700; color: #334155; cursor: pointer; user-select: none; }
.bu-context-fields-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 12px; }
.bu-context-fields-grid .full { grid-column: span 3; }
.bu-modal-footer { display: flex; justify-content: flex-end; gap: 10px; padding-top: 14px; border-top: 1px solid #f1f5f9; }
.bu-profile-container { max-width: 980px; margin: 0 auto; }
.bu-profile-card { background: #ffffff; border: 1px solid var(--bimusers-border); border-radius: 16px; overflow: hidden; margin-bottom: 28px; box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06); }
.bu-profile-cover { height: 110px; background: linear-gradient(135deg, #0b0f19 0%, #1e293b 50%, #2563eb 100%); }
.bu-profile-body { padding: 0 28px 28px; text-align: center; margin-top: -55px; }
.bu-profile-avatar-wrap { display: inline-block; margin-bottom: 12px; }
.profile-avatar-lg { border-radius: 50%; border: 4px solid #ffffff; box-shadow: 0 6px 16px rgba(0,0,0,0.12); object-fit: cover; }
.profile-name { font-size: 1.75rem; font-weight: 800; margin: 0 0 2px; color: #0f172a; letter-spacing: -0.02em; }
.profile-handle { font-size: 0.90rem; font-weight: 600; color: #64748b; margin-bottom: 8px; }
.profile-badge-row { margin: 6px 0 10px; }
.profile-role { display: inline-flex; align-items: center; gap: 6px; font-size: 0.88rem; font-weight: 600; color: #2563eb; background: #eff6ff; padding: 3px 12px; border-radius: 999px; margin-bottom: 10px; }
.profile-bio-text { font-size: 0.92rem; color: #475569; max-width: 600px; margin: 0 auto 12px; line-height: 1.5; }
.profile-meta-tags { display: flex; align-items: center; justify-content: center; gap: 14px; margin-bottom: 22px; flex-wrap: wrap; }
.profile-meta-tag { display: inline-flex; align-items: center; gap: 5px; font-size: 0.78rem; font-weight: 600; color: #64748b; text-decoration: none; }
.profile-meta-tag:hover { color: #2563eb; }
.bu-profile-stats-grid { display: flex; justify-content: center; gap: 12px; margin-top: 10px; flex-wrap: wrap; }
.profile-stat-box { background: #f8fafc; border: 1px solid var(--bimusers-border); border-radius: 12px; padding: 12px 18px; min-width: 105px; text-align: center; }
.profile-stat-box .stat-n { display: block; font-size: 1.45rem; font-weight: 800; color: #0f172a; line-height: 1.1; }
.profile-stat-box .stat-l { font-size: 0.70rem; font-weight: 700; text-transform: uppercase; color: var(--bimusers-muted); margin-top: 4px; display: block; }
.profile-stat-box.green { background: #f0fdf4; border-color: #bbf7d0; }
.profile-stat-box.green .stat-n { color: #166534; }
.profile-stat-box.blue { background: #eff6ff; border-color: #bfdbfe; }
.profile-stat-box.blue .stat-n { color: #1e40af; }
.profile-stat-box.purple { background: #faf5ff; border-color: #e9d5ff; }
.profile-stat-box.purple .stat-n { color: #6b21a8; }
.profile-stat-box.amber { background: #fefce8; border-color: #fef08a; }
.profile-stat-box.amber .stat-n { color: #854d0e; }
.bu-profile-activity-wrap { margin-top: 28px; }
.bu-profile-tabs-nav { display: flex; gap: 8px; border-bottom: 2px solid #e2e8f0; margin-bottom: 20px; }
.bu-profile-tab { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border: none; background: transparent; font-family: inherit; font-size: 0.92rem; font-weight: 700; color: #64748b; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.15s ease; }
.bu-profile-tab:hover { color: #2563eb; }
.bu-profile-tab.active { color: #2563eb; border-bottom-color: #2563eb; }
.bu-profile-empty-state { text-align: center; padding: 40px 20px; background: #ffffff; border: 1px dashed #e2e8f0; border-radius: 12px; color: #64748b; font-size: 0.92rem; }
.bu-user-answers-stream { display: flex; flex-direction: column; gap: 14px; }
.bu-user-answer-card { background: #ffffff; border: 1px solid var(--bimusers-border); border-radius: 12px; padding: 18px 20px; transition: border-color 0.15s ease; box-shadow: 0 1px 3px rgba(0,0,0,0.03); }
.bu-user-answer-card.is-solution { border-left: 4px solid #10b981; }
.bu-user-answer-card:hover { border-color: #cbd5e1; }
.answer-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.answer-topic-link-wrap { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 0.88rem; }
.answer-k { color: #64748b; font-weight: 500; font-size: 0.78rem; }
.answer-topic-title { font-weight: 700; color: #0f172a; text-decoration: none; }
.answer-topic-title:hover { color: #2563eb; }
.answer-body-prose { font-size: 0.88rem; color: #475569; line-height: 1.5; margin-bottom: 12px; }
.answer-footer { display: flex; align-items: center; gap: 14px; font-size: 0.75rem; color: #64748b; border-top: 1px solid #f8fafc; padding-top: 10px; }
.view-answer-link { margin-left: auto; color: #2563eb; font-weight: 600; text-decoration: none; }
.view-answer-link:hover { text-decoration: underline; }
.bu-forum-empty-state { text-align: center; padding: 60px 20px; background: var(--bimusers-surface); border: 1px dashed var(--bimusers-border); border-radius: var(--bimusers-radius); }
.empty-icon-wrap { width: 64px; height: 64px; border-radius: 50%; background: #eff6ff; color: var(--bimusers-primary); display: inline-flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.empty-title { font-size: 1.2rem; font-weight: 700; color: #0f172a; margin: 0 0 6px; }
.empty-subtitle { font-size: 0.92rem; color: var(--bimusers-muted); margin: 0 0 18px; }
@container buForum (max-width: 960px) { .bu-forum-layout-grid, .bu-topic-main-layout { grid-template-columns: 1fr; } .bu-forum-sidebar, .bu-topic-sidebar { display: none; } }
@media (max-width: 900px) { .bu-forum-layout-grid, .bu-topic-main-layout { grid-template-columns: 1fr; } .bu-forum-sidebar, .bu-topic-sidebar { display: none; } .bu-floating-ask-btn { display: flex; } }
@media (max-width: 640px) { .bu-hero-title { font-size: 1.8rem; } .bu-post-card, .bu-topic-card { padding: 14px; } .bu-context-fields-grid { grid-template-columns: 1fr; } .bu-context-fields-grid .full { grid-column: span 1; } }
.bu-search-dropdown { position: absolute; top: calc(100% + 8px); left: 0; right: 0; background: #ffffff; border: 1px solid #e2e8f0; border-radius: 14px; box-shadow: 0 20px 45px rgba(0,0,0,0.25), 0 6px 16px rgba(0,0,0,0.08); z-index: 99999 !important; max-height: 380px; overflow-y: auto; text-align: left; }
.bu-search-results-list { padding: 6px 0; }
.search-suggestion-item { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; border-bottom: 1px solid #f1f5f9; text-decoration: none !important; transition: background 0.15s ease; gap: 12px; }
.search-suggestion-item:last-child { border-bottom: none; }
.search-suggestion-item:hover, .search-suggestion-item.is-selected { background: #eff6ff; }
.search-item-left { flex: 1; min-width: 0; }
.search-suggestion-title { font-size: 0.92rem; font-weight: 600; color: #1e293b; line-height: 1.35; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: flex; align-items: center; }
.search-item-meta { font-size: 0.75rem; color: #64748b; margin-top: 3px; }
.search-suggestion-cat { font-size: 0.72rem; font-weight: 700; padding: 2px 8px; border-radius: 6px; white-space: nowrap; text-transform: uppercase; letter-spacing: 0.02em; }
.bu-search-hl { background: #fef08a; color: #854d0e; padding: 0 2px; border-radius: 2px; font-weight: 700; }
.bu-search-loading, .bu-search-empty { padding: 18px 20px; font-size: 0.88rem; color: #64748b; text-align: center; }
.bu-spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid #cbd5e1; border-top-color: #2563eb; border-radius: 50%; animation: buSpin 0.7s linear infinite; vertical-align: middle; margin-right: 6px; }
@keyframes buSpin { to { transform: rotate(360deg); } }
.bu-code-wrapper { margin: 18px 0; border-radius: 10px; background: #0f172a; border: 1px solid #1e293b; overflow: hidden; box-shadow: 0 4px 12px rgba(15,23,42,0.15); }
.bu-code-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 14px; background: #1e293b; border-bottom: 1px solid #334155; }
.bu-code-lang { font-size: 0.75rem; font-weight: 700; color: #94a3b8; text-transform: uppercase; letter-spacing: 0.05em; }
.bu-copy-code-btn { display: inline-flex; align-items: center; gap: 5px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); color: #cbd5e1; padding: 3px 10px; border-radius: 5px; font-size: 0.75rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; }
.bu-copy-code-btn:hover { background: rgba(255,255,255,0.15); color: #ffffff; }
.bu-copy-code-btn.is-copied { background: #166534; border-color: #22c55e; color: #dcfce7; }
.bu-code-wrapper pre { margin: 0 !important; padding: 14px 16px !important; background: transparent !important; border: none !important; border-radius: 0 !important; overflow-x: auto; color: #f8fafc; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace; font-size: 0.88rem; line-height: 1.6; }
.bu-code-wrapper pre code { background: transparent !important; padding: 0 !important; border: none !important; font-family: inherit; color: inherit; }
.bu-hl-kw { color: #f43f5e; font-weight: 600; }
.bu-hl-type { color: #38bdf8; font-weight: 600; }
.bu-hl-str { color: #a3e635; }
.bu-hl-com { color: #64748b; font-style: italic; }
.bu-rep-pill { display: inline-flex; align-items: center; gap: 4px; padding: 2px 7px; border-radius: 12px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.02em; white-space: nowrap; vertical-align: middle; }
.bu-rep-pill .rep-icon { display: inline-flex; align-items: center; }
.bu-rep-pill.tier-member { background: #f1f5f9; color: #475569; border: 1px solid #cbd5e1; }
.bu-rep-pill.tier-contributor { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }
.bu-rep-pill.tier-specialist { background: #f5f3ff; color: #6d28d9; border: 1px solid #ddd6fe; }
.bu-rep-pill.tier-champion { background: #fef3c7; color: #b45309; border: 1px solid #fde68a; }
.profile-stat-box.amber .stat-n { color: #b45309; }