/* ============================================================
   Borges BIM Viewer — UI kit styles
   Monochrome ink + white, hairline borders, sharp corners,
   blue (#3b82f6) as the lone functional accent.
   ============================================================ */
:root {
  --ink: #0a0a0a;
  --ink2: #222220;
  --graphite: #5e5e58;
  --mute: #9a9a92;
  --faint: #c2c2ba;
  --hair: #ebebe6;
  --hair2: #deded7;
  --paper: #ffffff;
  --paper2: #faf9f6;
  --accent: #3b82f6;
  --accent-wash: #eff6ff;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
#root { height: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper2);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
button { font-family: inherit; }
.bv-row { display: flex; align-items: center; }
.bv-eyebrow {
  margin: 0; font-size: 9px; font-weight: 600;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--mute);
}
.bv-mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- App frame ---------- */
.bv-app { display: flex; flex-direction: column; height: 100%; }
.bv-body { flex: 1; display: flex; min-height: 0; }
.bv-stage-wrap { position: relative; flex: 1; min-width: 0; background: #f5f5f5; }
.bv-canvas { position: absolute; inset: 0; }
.bv-canvas canvas { display: block; touch-action: none; }

/* ---------- Top bar ---------- */
.bv-topbar {
  height: 52px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 14px; background: var(--paper);
  border-bottom: 1px solid var(--hair); z-index: 20;
}
.bv-brand { display: flex; align-items: center; gap: 11px; }
.bv-brand-mark { height: 26px; display: block; }
.bv-brand-text {
  font-size: 13px; font-weight: 600; letter-spacing: 0.08em; color: var(--ink);
}
.bv-iconbtn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px; border: 1px solid transparent; background: transparent;
  color: var(--graphite); cursor: pointer; transition: all 0.14s; border-radius: 2px;
}
.bv-iconbtn:hover { background: var(--paper2); color: var(--ink); }
.bv-iconbtn.bv-off { color: var(--faint); }
.bv-iconbtn.bv-sm { padding: 5px; }
.bv-divider { width: 1px; height: 22px; background: var(--hair); margin: 0 8px; }
.bv-comments-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 13px; font-size: 12.5px; font-weight: 500; letter-spacing: 0.01em;
  color: var(--ink2); background: transparent; cursor: pointer;
  border: 1px solid var(--hair2); border-radius: 2px; transition: all 0.14s;
}
.bv-comments-btn:hover { border-color: var(--ink); }
.bv-comments-btn.bv-active { background: var(--ink); color: #fff; border-color: var(--ink); }
.bv-badge-count {
  font-family: var(--font-mono); font-size: 10px; line-height: 1;
  padding: 2px 5px; background: var(--accent); color: #fff; border-radius: 2px;
}

/* ---------- Sidebar ---------- */
.bv-sidebar {
  width: 288px; flex-shrink: 0; background: var(--paper);
  border-right: 1px solid var(--hair); display: flex; flex-direction: column;
}
.bv-side-scroll { flex: 1; overflow-y: auto; min-height: 0; }
.bv-side-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  padding: 14px 16px 11px; border-bottom: 1px solid var(--hair);
}
.bv-side-sub { margin: 5px 0 0; font-family: var(--font-mono);
  font-size: 9.5px; letter-spacing: 0.04em; color: var(--faint); }
.bv-side-actions {
  display: flex; gap: 0; padding: 9px 16px; border-bottom: 1px solid var(--hair);
}
.bv-side-actions button {
  flex: 1; background: transparent; border: none; cursor: pointer;
  font-size: 11.5px; color: var(--graphite); padding: 4px; transition: color 0.14s;
  letter-spacing: 0.01em;
}
.bv-side-actions button:first-child { border-right: 1px solid var(--hair); }
.bv-side-actions button:hover { color: var(--ink); }
.bv-cat-list { display: flex; flex-direction: column; }
.bv-cat-row {
  display: flex; align-items: center; gap: 12px; padding: 9px 16px;
  background: transparent; border: none; border-bottom: 1px solid var(--paper2);
  cursor: pointer; text-align: left; transition: background 0.12s;
}
.bv-cat-row:hover { background: var(--paper2); }
.bv-cat-row.bv-dim .bv-cat-label { color: var(--faint); }
.bv-eye-on { color: var(--accent); }
.bv-eye-off { color: var(--faint); }
.bv-cat-label { flex: 1; font-size: 13.5px; color: var(--ink2); }
.bv-cat-count { font-family: var(--font-mono); font-size: 11px; color: var(--mute); }

.bv-props { border-top: 1px solid var(--hair); max-height: 46%; display: flex; flex-direction: column; }
.bv-props-head {
  display: flex; align-items: center; gap: 9px; padding: 11px 16px;
  border-bottom: 1px solid var(--hair); flex-shrink: 0;
}
.bv-props-list { overflow-y: auto; }
.bv-prop { display: flex; flex-direction: column; gap: 2px; padding: 8px 16px;
  border-bottom: 1px solid var(--paper2); }
.bv-prop-k { margin: 0; font-family: var(--font-mono); font-size: 9px;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--mute); }
.bv-prop-v { margin: 0; font-size: 13.5px; color: var(--ink2); }
.bv-prop-v.bv-mono { font-family: var(--font-mono); font-size: 12.5px; }
.bv-props-empty { padding: 18px 16px; border-top: 1px solid var(--hair); }
.bv-props-empty p { margin: 0; font-size: 12.5px; color: var(--faint); line-height: 1.5; }

/* ---------- Bottom toolbar ---------- */
.bv-bottombar {
  position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%);
  display: inline-flex; align-items: center; gap: 1px; z-index: 15;
  background: var(--paper); border: 1px solid var(--hair);
  box-shadow: 0 -2px 12px rgba(10, 10, 10, 0.06); padding: 7px 9px;
}
.bv-tool {
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  min-width: 56px; padding: 7px 11px; background: transparent; border: none;
  color: var(--graphite); cursor: pointer; transition: all 0.14s;
}
.bv-tool:hover { background: var(--paper2); color: var(--ink); }
.bv-tool.bv-active { color: var(--accent); }
.bv-tool span { font-size: 10px; font-weight: 500; letter-spacing: 0.02em; }
.bv-bsep { width: 1px; height: 34px; background: var(--hair); margin: 0 6px; }

/* ---------- ViewCube ---------- */
.bv-viewcube {
  position: absolute; top: 18px; right: 18px; z-index: 15;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.bv-cube-stage { perspective: 560px; width: 84px; height: 84px; }
.bv-cube { position: relative; width: 84px; height: 84px;
  transform-style: preserve-3d; transition: transform 0.35s var(--ease); }
.bv-face {
  position: absolute; width: 84px; height: 84px;
  display: flex; align-items: center; justify-content: center;
  font-size: 9.5px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--graphite); background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--ink); cursor: pointer; backface-visibility: hidden;
  transition: background 0.14s, color 0.14s; user-select: none;
}
.bv-face:hover { background: var(--accent-wash); color: var(--accent); border-color: var(--accent); }
.bv-cube-home {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; background: var(--paper); border: 1px solid var(--hair);
  color: var(--graphite); cursor: pointer; transition: all 0.14s;
}
.bv-cube-home:hover { color: var(--ink); border-color: var(--ink); }

/* ---------- Measure / hint chips ---------- */
.bv-hint {
  position: absolute; top: 18px; left: 50%; transform: translateX(-50%);
  z-index: 15; display: inline-flex; align-items: center; gap: 10px;
  background: var(--ink); color: #fff; padding: 8px 14px;
  font-size: 12px; letter-spacing: 0.01em; box-shadow: 0 4px 16px rgba(10,10,10,0.18);
}
.bv-hint .bv-mono { color: var(--accent); font-weight: 500; }
.bv-hint button {
  background: transparent; border: none; color: rgba(255,255,255,0.7);
  cursor: pointer; display: inline-flex; padding: 0; margin-left: 2px;
}
.bv-hint button:hover { color: #fff; }

/* ---------- Section slider ---------- */
.bv-section-ctrl {
  position: absolute; left: 18px; top: 50%; transform: translateY(-50%);
  z-index: 15; background: var(--paper); border: 1px solid var(--hair);
  box-shadow: 0 4px 16px rgba(10,10,10,0.08); padding: 14px 12px;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.bv-section-ctrl .bv-eyebrow { writing-mode: vertical-rl; }
.bv-section-ctrl input[type=range] {
  writing-mode: vertical-lr; direction: rtl; width: 8px; height: 130px;
  accent-color: var(--accent); cursor: pointer;
}
.bv-section-ctrl .bv-mono { font-size: 10px; color: var(--graphite); }

/* ---------- Comments drawer ---------- */
.bv-comments {
  width: 300px; flex-shrink: 0; background: var(--paper);
  border-left: 1px solid var(--hair); display: flex; flex-direction: column;
}
.bv-comments-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px 11px; border-bottom: 1px solid var(--hair);
}
.bv-add-comment {
  display: flex; align-items: center; gap: 9px; margin: 12px 16px;
  padding: 10px 13px; background: transparent; border: 1px solid var(--hair2);
  color: var(--ink2); font-size: 12.5px; font-weight: 500; cursor: pointer;
  transition: all 0.14s; text-align: left;
}
.bv-add-comment:hover { border-color: var(--ink); }
.bv-add-comment.bv-active { background: var(--accent-wash); border-color: var(--accent); color: var(--accent); }
.bv-comments-list { flex: 1; overflow-y: auto; padding: 0 16px; }
.bv-comments-empty { font-size: 12.5px; color: var(--faint); line-height: 1.55; padding: 6px 0; }
.bv-comment {
  padding: 11px 0; border-bottom: 1px solid var(--paper2); cursor: pointer;
}
.bv-comment.bv-sel { background: var(--accent-wash); margin: 0 -16px; padding: 11px 16px; }
.bv-comment-top { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.bv-pin-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 18px; height: 18px; background: var(--ink); color: #fff;
  font-family: var(--font-mono); font-size: 10px; flex-shrink: 0;
}
.bv-comment.bv-sel .bv-pin-num { background: var(--accent); }
.bv-comment-author { font-size: 12px; font-weight: 600; color: var(--ink2); }
.bv-comment-time { font-family: var(--font-mono); font-size: 9px; color: var(--faint); margin-left: auto; }
.bv-comment-del { background: transparent; border: none; color: var(--faint); cursor: pointer; padding: 2px; display: inline-flex; }
.bv-comment-del:hover { color: #cf473d; }
.bv-comment-body { margin: 0; font-size: 13px; color: var(--ink2); line-height: 1.5; padding-left: 26px; }
.bv-comment-compose { padding: 12px 16px; border-top: 1px solid var(--hair); }
.bv-comment-compose textarea {
  width: 100%; resize: none; border: 1px solid var(--hair2); padding: 9px 10px;
  font-family: inherit; font-size: 13px; color: var(--ink2); border-radius: 2px;
}
.bv-comment-compose textarea:focus { outline: none; border-color: var(--accent); }
.bv-send {
  margin-top: 9px; width: 100%; display: inline-flex; align-items: center;
  justify-content: center; gap: 7px; padding: 9px; background: var(--ink);
  color: #fff; border: none; font-size: 12.5px; font-weight: 500; cursor: pointer;
  transition: background 0.14s;
}
.bv-send:hover { background: #000; }
.bv-send:disabled { background: #d8d8d2; color: #fff; cursor: not-allowed; }

/* ---------- Comment pins (in canvas) ---------- */
.bv-pin {
  position: absolute; transform: translate(-50%, -100%); z-index: 12;
  cursor: pointer; pointer-events: auto;
}
.bv-pin-dot {
  width: 24px; height: 24px; background: var(--ink); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 11px;
  box-shadow: 0 2px 8px rgba(10,10,10,0.3);
  clip-path: polygon(50% 0, 100% 0, 100% 75%, 58% 75%, 50% 100%, 42% 75%, 0 75%, 0 0);
  padding-bottom: 6px;
}
.bv-pin.bv-sel .bv-pin-dot { background: var(--accent); }

/* ---------- Load screen ---------- */
.bv-loadscreen {
  position: absolute; inset: 0; display: flex; align-items: center;
  justify-content: center; background: var(--paper2); z-index: 30;
}
.bv-load-inner { width: 460px; max-width: 90%; text-align: center; }
.bv-load-brand { margin-bottom: 34px; }
.bv-load-logo { height: 40px; }
.bv-load-eyebrow {
  margin: 14px 0 0; font-size: 9px; font-weight: 500; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--mute);
}
.bv-dropzone {
  position: relative; border: 1px solid var(--hair2); padding: 42px 34px;
  cursor: pointer; transition: all 0.16s; background: var(--paper);
}
.bv-dropzone:hover, .bv-dropzone.bv-drag { border-color: var(--accent); background: var(--accent-wash); }
.bv-drop-icon { color: var(--ink2); margin-bottom: 16px; }
.bv-dropzone.bv-drag .bv-drop-icon { color: var(--accent); }
.bv-drop-title { margin: 0 0 6px; font-size: 15px; font-weight: 600; color: var(--ink); letter-spacing: -0.005em; }
.bv-drop-sub { margin: 0; font-size: 12.5px; color: var(--mute); }
.bv-load-foot { margin: 18px 0 0; font-family: var(--font-mono); font-size: 9px;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--faint); }
.bv-demo-link {
  margin-top: 22px; background: transparent; border: none; cursor: pointer;
  font-size: 12.5px; color: var(--graphite); transition: color 0.14s;
}
.bv-demo-link:hover { color: var(--accent); }

/* ---------- Loading overlay ---------- */
.bv-loading {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 16px;
  background: rgba(250, 249, 246, 0.92); backdrop-filter: blur(3px); z-index: 28;
}
.bv-spinner { animation: bv-spin 0.9s linear infinite; color: var(--graphite); }
@keyframes bv-spin { to { transform: rotate(360deg); } }
.bv-loading-text { font-size: 13px; color: var(--graphite); letter-spacing: 0.01em; }
.bv-loading-bar { width: 220px; height: 2px; background: var(--hair); overflow: hidden; }
.bv-loading-bar i { display: block; height: 100%; background: var(--ink); transition: width 0.3s; }

::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: var(--hair2); }
::-webkit-scrollbar-thumb:hover { background: var(--mute); }

/* ---------- Object-snap marker ---------- */
.bv-snap {
  position: absolute; transform: translate(-50%, -50%); z-index: 16;
  pointer-events: none; display: flex; flex-direction: column; align-items: center;
}
.bv-snap-glyph { filter: drop-shadow(0 0 2px #fff) drop-shadow(0 0 2px #fff); }
.bv-snap-label {
  margin-top: 3px; transform: translateX(14px);
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.04em;
  color: #fff; background: var(--accent); padding: 1px 5px; white-space: nowrap;
}

/* ============================================================
   Client login
   ============================================================ */
.bv-login {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 22px; background: var(--paper2);
}
.bv-login-card {
  width: 360px; max-width: 90%; background: var(--paper);
  border: 1px solid var(--hair); padding: 36px 34px; display: flex; flex-direction: column;
}
.bv-login-logo { height: 34px; align-self: flex-start; }
.bv-login-eyebrow {
  margin: 16px 0 26px; font-size: 9px; font-weight: 600; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--mute);
}
.bv-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.bv-field span {
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--mute);
}
.bv-field input {
  font-family: inherit; font-size: 14px; color: var(--ink2); padding: 10px 12px;
  border: 1px solid var(--hair2); border-radius: 4px; background: var(--paper);
}
.bv-field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.18); }
.bv-login-btn {
  margin-top: 8px; padding: 11px; background: var(--ink); color: #fff; border: none;
  font-size: 13.5px; font-weight: 500; letter-spacing: 0.02em; cursor: pointer; transition: background 0.14s;
}
.bv-login-btn:hover { background: #000; }
.bv-login-btn:disabled { background: #d8d8d2; cursor: not-allowed; }
.bv-demo-portal-btn {
  margin-top: 10px; padding: 10px; background: var(--paper); color: var(--ink2);
  border: 1px solid var(--hair2); font-size: 13px; font-weight: 500;
  cursor: pointer; transition: all 0.14s;
}
.bv-demo-portal-btn:hover { border-color: var(--ink); background: var(--paper2); }
.bv-login-error {
  margin: -2px 0 10px; padding: 9px 10px; border-left: 2px solid #cf473d;
  background: #fff6f5; color: #9b2f28; font-size: 12.5px; line-height: 1.45;
}
.bv-login-link {
  margin-top: 16px; text-align: center; font-size: 12px; color: var(--graphite);
  text-decoration: none; transition: color 0.14s;
}
.bv-login-link:hover { color: var(--accent); }
.bv-login-foot {
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.16em; color: var(--faint);
}

/* ============================================================
   Client portal
   ============================================================ */
.bv-portal { position: absolute; inset: 0; display: flex; flex-direction: column; background: var(--paper2); }
.bv-portal-top {
  height: 56px; flex-shrink: 0; display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px; background: var(--paper); border-bottom: 1px solid var(--hair);
}
.bv-portal-user { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.3; }
.bv-portal-user-name { font-size: 12.5px; font-weight: 600; color: var(--ink2); }
.bv-portal-user-mail { font-family: var(--font-mono); font-size: 9px; color: var(--faint); }
.bv-avatar {
  width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center;
  background: var(--ink); color: #fff; font-size: 12px; font-weight: 600; letter-spacing: 0.04em;
}
.bv-portal-body { flex: 1; overflow-y: auto; padding: 30px 28px 48px; }
.bv-portal-body > * { max-width: 920px; margin-left: auto; margin-right: auto; }
.bv-project-switcher {
  display: flex; align-items: center; gap: 12px; margin-bottom: 14px;
}
.bv-project-switcher select {
  flex: 1; border: 1px solid var(--hair2); background: var(--paper);
  color: var(--ink2); font-family: inherit; font-size: 13px; padding: 8px 10px;
}
.bv-project-switcher select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.18);
}
.bv-empty-state {
  background: var(--paper); border: 1px solid var(--hair); padding: 28px;
  color: var(--graphite); font-size: 13px;
}
.bv-admin-panel {
  background: var(--paper); border: 1px solid var(--hair); padding: 16px;
  margin-bottom: 18px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.bv-admin-head {
  grid-column: 1 / -1; display: flex; align-items: baseline; justify-content: space-between;
  border-bottom: 1px solid var(--hair); padding-bottom: 10px; color: var(--graphite);
  font-size: 12.5px;
}
.bv-admin-form {
  display: flex; flex-direction: column; gap: 8px; min-width: 0;
}
.bv-admin-form strong {
  font-size: 12.5px; font-weight: 600; color: var(--ink2);
}
.bv-admin-form input, .bv-admin-form select {
  width: 100%; border: 1px solid var(--hair2); background: var(--paper);
  color: var(--ink2); font-family: inherit; font-size: 12.5px; padding: 8px 9px;
}
.bv-admin-form input:focus, .bv-admin-form select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.18);
}
.bv-admin-form button {
  padding: 9px 10px; background: var(--ink); color: #fff; border: none;
  font-size: 12.5px; font-weight: 500; cursor: pointer;
}
.bv-admin-form button:disabled { background: #d8d8d2; cursor: not-allowed; }

.bv-project-card {
  display: flex; align-items: stretch; justify-content: space-between; gap: 24px;
  background: var(--paper); border: 1px solid var(--hair); padding: 26px 28px; margin-bottom: 26px;
}
.bv-project-name { margin: 8px 0 14px; font-size: 24px; font-weight: 600; letter-spacing: -0.02em; color: var(--ink); }
.bv-project-meta { display: flex; flex-direction: column; gap: 6px; margin-bottom: 22px; }
.bv-project-meta span { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--graphite); }
.bv-project-meta svg { color: var(--mute); }
.bv-open-model {
  display: inline-flex; align-items: center; gap: 9px; align-self: flex-start;
  padding: 11px 18px; background: var(--ink); color: #fff; border: none; cursor: pointer;
  font-size: 13.5px; font-weight: 500; transition: background 0.14s;
}
.bv-open-model:hover { background: #000; }
.bv-open-model:disabled { background: #d8d8d2; cursor: not-allowed; }
.bv-open-model-sub {
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.04em;
  color: rgba(255,255,255,0.6); padding-left: 10px; margin-left: 6px; border-left: 1px solid rgba(255,255,255,0.2);
}
.bv-project-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.bv-upload-btn {
  position: relative; display: inline-flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 9px 12px; border: 1px solid var(--hair2); background: var(--paper);
  color: var(--ink2); font-size: 12.5px; font-weight: 500; cursor: pointer;
}
.bv-upload-btn:hover { border-color: var(--ink); }
.bv-upload-btn input[type=file] {
  position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none;
}
.bv-upload-btn select {
  border: 1px solid var(--hair2); background: var(--paper2); color: var(--graphite);
  font-family: inherit; font-size: 11.5px; padding: 4px 6px;
}
.bv-upload-active {
  display: inline-flex; align-items: center; gap: 5px; font-family: var(--font-mono);
  font-size: 9px; color: var(--mute); text-transform: uppercase; letter-spacing: 0.05em;
}
.bv-project-3d {
  width: 168px; flex-shrink: 0; background: #f5f5f5; border: 1px solid var(--hair);
  position: relative; display: flex; align-items: center; justify-content: center; cursor: pointer;
  background-image: linear-gradient(#ececea 1px, transparent 1px), linear-gradient(90deg, #ececea 1px, transparent 1px);
  background-size: 14px 14px;
}
.bv-project-3d-tag {
  position: absolute; bottom: 8px; right: 9px; font-family: var(--font-mono);
  font-size: 8.5px; letter-spacing: 0.1em; color: var(--mute);
}
.bv-mini-cube { width: 54px; height: 54px; position: relative; transform: rotate(0deg); }
.bv-mini-cube span {
  position: absolute; box-sizing: border-box; border: 1.5px solid var(--ink); background: rgba(255,255,255,0.7);
}
.bv-mini-cube span:nth-child(1) { width: 38px; height: 38px; left: 0; top: 12px; }
.bv-mini-cube span:nth-child(2) { width: 38px; height: 38px; left: 16px; top: 0; background: rgba(59,130,246,0.10); border-color: var(--accent); }
.bv-mini-cube span:nth-child(3) { width: 0; height: 0; border: none; }

.bv-crumb { display: flex; align-items: center; gap: 4px; margin-bottom: 12px; }
.bv-crumb button {
  display: inline-flex; align-items: center; gap: 7px; background: transparent; border: none;
  font-size: 12.5px; color: var(--graphite); cursor: pointer; padding: 3px 5px;
}
.bv-crumb button:hover { color: var(--ink); }
.bv-crumb .bv-crumb-cur { color: var(--ink); font-weight: 500; }
.bv-crumb-sep { color: var(--faint); }

.bv-files { background: var(--paper); border: 1px solid var(--hair); }
.bv-files-head, .bv-file-row {
  display: grid; grid-template-columns: 1fr 120px 120px; align-items: center;
  padding: 0 18px; gap: 12px;
}
.bv-files-head {
  height: 38px; border-bottom: 1px solid var(--hair);
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--faint);
}
.bv-file-row {
  height: 48px; background: transparent; border: none; border-bottom: 1px solid var(--paper2);
  cursor: pointer; text-align: left; font-family: inherit; transition: background 0.12s; width: 100%;
}
.bv-file-row:hover { background: var(--paper2); }
.bv-file-row:last-child { border-bottom: none; }
.bv-file-name { display: flex; align-items: center; gap: 12px; font-size: 13.5px; color: var(--ink2); }
.bv-file-ic { color: var(--graphite); }
.bv-file-ic.bv-folder { color: var(--ink); }
.bv-file-ic.bv-ifc { color: var(--accent); }
.bv-file-meta { font-family: var(--font-mono); font-size: 11px; color: var(--mute); }
.bv-file-up .bv-file-name { color: var(--mute); }
.bv-file-badge {
  font-family: var(--font-mono); font-size: 8.5px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--accent); padding: 1px 5px; margin-left: 4px;
}
.bv-file-placeholder {
  padding: 20px 18px; font-size: 12.5px; color: var(--faint);
}

/* scrim (overlay backdrop) — hidden on desktop, shown on mobile */
.bv-scrim { display: none; }

/* ============================================================
   RESPONSIVE — phones & small tablets (pedreiros no celular)
   ============================================================ */
@media (max-width: 760px) {
  .bv-topbar { height: 50px; padding: 0 10px; }
  .bv-topbar .bv-brand-text { display: none; }
  .bv-brand-mark { height: 24px; }
  .bv-desktop-only { display: none !important; }
  .bv-comments-btn { padding: 7px 9px; }
  .bv-comments-btn span:not(.bv-badge-count) { display: none; }

  /* sidebar + comments become slide-over overlays */
  .bv-scrim { display: block; position: absolute; inset: 0; z-index: 38; background: rgba(10,10,10,0.35); }
  .bv-sidebar {
    position: absolute; top: 0; left: 0; bottom: 0; z-index: 40;
    width: 82vw; max-width: 320px; box-shadow: 0 0 48px rgba(10,10,10,0.22);
  }
  .bv-comments {
    position: absolute; top: 0; right: 0; bottom: 0; z-index: 40;
    width: 86vw; max-width: 340px; box-shadow: 0 0 48px rgba(10,10,10,0.22);
  }

  /* bottom toolbar: scrollable, compact */
  .bv-bottombar {
    bottom: 12px; max-width: 95vw; padding: 6px 7px;
    overflow-x: auto; -webkit-overflow-scrolling: touch; justify-content: flex-start;
  }
  .bv-bottombar::-webkit-scrollbar { display: none; }
  .bv-tool { min-width: 50px; padding: 6px 9px; flex-shrink: 0; }
  .bv-tool [data-lucide], .bv-tool svg { width: 19px; height: 19px; }
  .bv-tool span { font-size: 9.5px; }
  .bv-bsep { margin: 0 3px; height: 30px; }

  /* ViewCube + section control scale down / reposition */
  .bv-viewcube { top: 10px; right: 10px; transform: scale(0.72); transform-origin: top right; }
  .bv-section-ctrl { left: 10px; padding: 10px 9px; }
  .bv-hint { top: 60px; max-width: 92vw; font-size: 11px; padding: 7px 11px; text-align: center; }

  /* portal */
  .bv-portal-top { height: 52px; padding: 0 14px; }
  .bv-portal-user-mail { display: none; }
  .bv-portal-body { padding: 18px 14px 40px; }
  .bv-admin-panel { grid-template-columns: 1fr; }
  .bv-admin-head { flex-direction: column; gap: 6px; align-items: flex-start; }
  .bv-project-card { flex-direction: column; padding: 20px; gap: 18px; }
  .bv-project-3d { width: 100%; height: 130px; }
  .bv-project-name { font-size: 20px; }
  .bv-open-model { width: 100%; justify-content: center; }
  .bv-files-head { grid-template-columns: 1fr 86px; }
  .bv-file-row { grid-template-columns: 1fr 86px; }
  .bv-files-head span:last-child, .bv-file-row .bv-file-meta:last-child { display: none; }
  .bv-file-name { font-size: 13px; }
}

@media (max-width: 420px) {
  .bv-tool span { display: none; }
  .bv-tool { min-width: 42px; gap: 0; }
  .bv-files-head, .bv-file-row { grid-template-columns: 1fr; }
  .bv-files-head span:not(:first-child), .bv-file-row .bv-file-meta { display: none; }
}