/* ===== Public CAD Viewer page — self-contained (uses tokens from styles.css) ===== */
/* CRITICAL: our display:flex/grid rules would otherwise override the HTML `hidden` attribute,
   leaving the drop zone / toolbar / overlays permanently visible. This restores correct hiding. */
[hidden]{display:none!important}

.viewer-page{min-height:100vh;display:flex;flex-direction:column}

.v-bar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:12px 24px;background:rgba(14,17,22,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.v-bar .brand{display:flex;align-items:center;gap:10px}
.v-bar__actions{display:flex;gap:10px;align-items:center}

.v-main{flex:1;width:100%;max-width:1240px;margin:0 auto;padding:28px 24px 40px;display:flex;flex-direction:column}

.v-intro{text-align:center;max-width:760px;margin:10px auto 26px}
.v-trust{display:inline-block;margin-bottom:14px;padding:8px 16px;border:1px solid rgba(95,211,138,.4);border-radius:999px;
  background:rgba(95,211,138,.08);color:#5fd38a;font-weight:600;font-size:.9rem;letter-spacing:.02em}
.v-intro h1{font-family:'Sora',sans-serif;font-weight:800;font-size:clamp(1.7rem,4vw,2.6rem);line-height:1.1;margin:10px 0 14px}
.v-intro p{color:var(--muted)}
.v-intro strong{color:var(--silver)}

.v-shell{flex:1;display:flex;flex-direction:column;min-height:520px}

/* Drop zone */
.v-drop{flex:1;min-height:440px;border:2px dashed var(--line);border-radius:var(--radius);
  display:grid;place-items:center;text-align:center;cursor:pointer;background:var(--surface);
  transition:border-color .25s,background .25s}
.v-drop:hover,.v-drop:focus-visible{border-color:var(--amber);background:var(--surface-2);outline:none}
.v-drop.is-drag{border-color:var(--amber);background:rgba(255,138,61,.08)}
.v-drop__icon{font-size:3.4rem;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;margin-bottom:6px}
.v-drop h2{font-family:'Sora',sans-serif;font-size:1.5rem;margin-bottom:6px}
.v-drop p{color:var(--muted);margin:2px 0}
.v-link{color:var(--amber-2);font-weight:600;text-decoration:underline}
.v-formats{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.82rem;letter-spacing:.06em;color:var(--silver);margin-top:14px!important}
.v-limit{font-size:.82rem;color:var(--muted)}

/* Toolbar */
.v-toolbar{display:flex;flex-wrap:wrap;gap:6px;align-items:center;padding:10px;margin-bottom:12px;
  background:var(--surface);border:1px solid var(--line);border-radius:12px}
.v-tool{font-family:'Inter',sans-serif;font-size:.85rem;font-weight:500;color:var(--silver);
  background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:8px 12px;cursor:pointer;
  transition:border-color .2s,color .2s,background .2s;white-space:nowrap}
.v-tool:hover{border-color:rgba(255,138,61,.5);color:var(--text)}
.v-tool.is-on{background:var(--grad);color:#1a1205;border-color:transparent;font-weight:600}
.v-tool--accent{background:rgba(255,138,61,.12);color:var(--amber-2);border-color:rgba(255,138,61,.35)}
.v-sep{width:1px;align-self:stretch;background:var(--line);margin:2px 4px}

/* Stage */
.v-stage{position:relative;flex:1;min-height:520px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#0c0f15}
.v-canvas{position:absolute;inset:0}
.v-canvas canvas{display:block;width:100%;height:100%}

/* Components panel */
.v-tree{position:absolute;top:12px;right:12px;width:min(280px,70vw);max-height:calc(100% - 24px);
  display:flex;flex-direction:column;background:rgba(20,25,35,.96);border:1px solid var(--line);border-radius:12px;backdrop-filter:blur(8px)}
.v-tree__head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--line);font-family:'Sora',sans-serif;font-weight:600;font-size:.95rem}
.v-tree__head button{background:none;border:none;color:var(--muted);font-size:1.3rem;cursor:pointer;line-height:1}
.v-tree__body{overflow-y:auto;padding:8px 6px;display:flex;flex-direction:column;gap:2px}
.v-tree__foot{padding:10px 12px;border-top:1px solid var(--line)}
.v-tree__item{display:flex;align-items:center;gap:9px;padding:7px 9px;border-radius:7px;font-size:.85rem;color:var(--silver);cursor:pointer}
.v-tree__item:hover{background:var(--surface-2)}
.v-tree__item input{accent-color:var(--amber);width:15px;height:15px}

/* Loading + error overlays */
.v-loading,.v-error{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:24px;background:rgba(12,15,21,.82);backdrop-filter:blur(3px)}
.v-loading p,.v-error p{color:var(--silver)}
.v-loading__sub{color:var(--muted)!important;font-size:.85rem}
.v-error p{color:#ff9b8a}
.v-spinner{width:46px;height:46px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--amber);animation:v-spin 0.9s linear infinite}
@keyframes v-spin{to{transform:rotate(360deg)}}
.v-progress{width:min(420px,78%);height:8px;border-radius:6px;background:var(--bg);border:1px solid var(--line);overflow:hidden}
.v-progress__fill{height:100%;width:0;border-radius:6px;background:var(--grad);transition:width .25s linear}

.v-foot{text-align:center;color:var(--muted);font-size:.82rem;margin-top:18px}
.v-foot a{color:var(--amber-2)}

@media(max-width:600px){
  .v-bar{padding:10px 14px}
  .v-bar__actions .btn--ghost{display:none}
  .v-main{padding:18px 14px 28px}
  .v-tool{padding:7px 10px;font-size:.8rem}
}
@media(prefers-reduced-motion:reduce){.v-spinner{animation:none}}