/* ==========================================================================
   AI Visual Tools — assets/visual-tools.css
   ========================================================================== */

.vt-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.vt-hero {
  text-align: center;
  padding: 40px 0 24px;
}
.vt-hero h1 {
  font: 800 clamp(28px, 4vw, 42px) / 1.15 var(--font-display);
  color: var(--ink);
  margin: 10px 0 10px;
}
.vt-hero p {
  font: 500 16px/1.6 var(--font-body);
  color: var(--ink-soft);
  max-width: 620px;
  margin: 0 auto;
}

/* ---- tab bar ---- */
.vt-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 28px 0 26px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}
.vt-tab {
  appearance: none;
  border: none;
  background: transparent;
  font: 700 14.5px var(--font-display);
  color: var(--ink-soft);
  padding: 12px 18px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 3px solid transparent;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.vt-tab svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.8; }
.vt-tab:hover { color: var(--ink); background: var(--surface-2); }
.vt-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ---- panel ---- */
.vt-panel { }
.vt-panel[hidden] { display: none; }

.vt-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 22px 24px;
  margin-bottom: 22px;
}

.vt-gen-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.vt-topic {
  flex: 1 1 320px;
  min-width: 220px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--ink);
  font: 500 15px var(--font-body);
}
.vt-topic:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.vt-accent-wrap { display: flex; align-items: center; gap: 8px; font: 600 12.5px var(--font-body); color: var(--ink-faint); }
.vt-accent { width: 38px; height: 38px; padding: 0; border: 1px solid var(--border); border-radius: 10px; cursor: pointer; background: none; }

.vt-generate {
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--accent);
  color: var(--accent-ink);
  font: 700 14.5px var(--font-display);
  cursor: pointer;
  white-space: nowrap;
  transition: transform .12s ease, opacity .12s ease;
}
.vt-generate:hover:not(:disabled) { transform: translateY(-1px); }
.vt-generate:disabled { opacity: .6; cursor: default; transform: none; }

.vt-quick-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.vt-chip {
  font: 600 12.5px var(--font-body);
  color: var(--accent);
  background: var(--accentSoft, var(--surface-2));
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 13px;
  cursor: pointer;
  transition: background .12s ease;
}
.vt-chip:hover { background: var(--surface-2); }

/* ---- deep dive toggle ---- */
.vt-deep-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  cursor: pointer;
  user-select: none;
  position: relative;
}
.vt-deep-toggle input { position: absolute; opacity: 0; width: 0; height: 0; }
.vt-deep-slider {
  flex: 0 0 auto;
  width: 38px;
  height: 22px;
  border-radius: 999px;
  background: var(--border);
  position: relative;
  transition: background .15s ease;
}
.vt-deep-slider::before {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #FFFFFF;
  box-shadow: 0 1px 2px rgba(0,0,0,.25);
  transition: transform .15s ease;
}
.vt-deep-toggle input:checked + .vt-deep-slider { background: var(--accent); }
.vt-deep-toggle input:checked + .vt-deep-slider::before { transform: translateX(16px); }
.vt-deep-toggle input:focus-visible + .vt-deep-slider { outline: 2px solid var(--accent); outline-offset: 2px; }
.vt-deep-copy { display: flex; flex-direction: column; gap: 1px; }
.vt-deep-copy strong { font: 700 13.5px var(--font-display); color: var(--ink); display: flex; align-items: center; gap: 6px; }
.vt-deep-copy small { font: 600 11.5px var(--font-body); color: var(--ink-faint); }
.vt-deep-badge {
  font: 800 10px var(--font-display);
  letter-spacing: .03em;
  text-transform: uppercase;
  color: #FFFFFF;
  background: linear-gradient(135deg, #A233C9, #6E5BD6);
  padding: 2px 7px;
  border-radius: 999px;
}

.vt-status {
  margin-top: 12px;
  font: 600 13px var(--font-body);
  color: var(--ink-soft);
  display: none;
}
.vt-status.show { display: block; }
.vt-status.error { color: #C0392B; }
.vt-status.deep { color: var(--accent); }

/* ---- preview stage ---- */
.vt-stage {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 16px;
  margin-bottom: 18px;
}
.vt-preview {
  width: 100%;
  display: block;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #FFFFFF;
  border: 1px solid var(--border);
}
.vt-preview svg { width: 100%; height: auto; display: block; }

.vt-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-faint);
  font: 600 14px var(--font-body);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
}
.vt-empty svg { width: 40px; height: 40px; stroke: var(--ink-faint); fill: none; stroke-width: 1.5; margin-bottom: 10px; }

.vt-pager {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 14px;
}
.vt-pager.show { display: flex; }
.vt-pager button {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--ink);
  font: 700 16px var(--font-body);
  cursor: pointer;
  transition: background .12s ease, opacity .12s ease;
}
.vt-pager button:hover:not(:disabled) { background: var(--border); }
.vt-pager button:disabled { opacity: .4; cursor: default; }
.vt-page-info { font: 700 12.5px var(--font-body); color: var(--ink-soft); min-width: 96px; text-align: center; }

.vt-export-row { display: flex; gap: 10px; justify-content: center; margin-top: 16px; flex-wrap: wrap; }
.vt-export-row button {
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--ink);
  font: 700 13.5px var(--font-body);
  cursor: pointer;
  transition: background .12s ease, opacity .12s ease;
}
.vt-export-row button:hover:not(:disabled) { background: var(--border); }
.vt-export-row button:disabled { opacity: .5; cursor: default; }

@media (max-width: 640px) {
  .vt-tab { padding: 10px 12px; font-size: 13px; }
  .vt-card, .vt-stage { padding: 16px; }
}

/* ================================================================
   FUTURISTIC VISUAL LAB — 2D / 3D / HYBRID WORKSPACE
   ================================================================ */
.vt-lab-toolbar{
  display:flex; flex-wrap:wrap; align-items:center; gap:8px;
  padding:10px; margin-bottom:12px; border:1px solid var(--border);
  border-radius:14px; background:linear-gradient(180deg,var(--surface),var(--surface-2));
}
.vt-lab-group{display:flex; align-items:center; gap:5px; flex-wrap:wrap;}
.vt-lab-label{font:800 10px/1 var(--font-display); text-transform:uppercase; letter-spacing:.08em; color:var(--ink-faint); margin-right:2px;}
.vt-lab-btn,.vt-lab-select{height:34px; border:1px solid var(--border); border-radius:10px; background:var(--surface); color:var(--ink); padding:0 10px; font:700 12px var(--font-body); cursor:pointer; transition:.15s ease;}
.vt-lab-btn:hover{transform:translateY(-1px); background:var(--surface-2)}
.vt-lab-btn.active{border-color:var(--accent); color:var(--accent); box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 12%, transparent);}
.vt-lab-btn:disabled{opacity:.5; cursor:default; transform:none}
.vt-lab-select{padding-right:28px;}
.vt-lab-check{display:inline-flex; align-items:center; gap:7px; height:34px; padding:0 10px; border:1px solid var(--border); border-radius:10px; font:700 12px var(--font-body); color:var(--ink-soft); background:var(--surface); cursor:pointer;}
.vt-lab-check input{accent-color:var(--accent);}
.vt-direction-wrap{display:flex; gap:8px; width:100%; margin-top:4px;}
.vt-direction{flex:1; min-width:220px; padding:10px 12px; border:1px solid var(--border); border-radius:10px; background:var(--bg); color:var(--ink); font:500 12.5px var(--font-body);}
.vt-direction:focus{outline:2px solid var(--accent); outline-offset:1px}
.vt-workspace{display:grid; grid-template-columns:minmax(0,1fr); gap:12px;}
.vt-workspace.vt-mode-hybrid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}
.vt-workspace.vt-mode-3d{grid-template-columns:minmax(0,1fr);}
.vt-3d-shell{display:none; border:1px solid var(--border); border-radius:16px; overflow:hidden; background:radial-gradient(circle at 50% 30%, color-mix(in srgb,var(--accent) 10%, transparent), transparent 40%), #080B12; position:relative; min-height:520px;}
.vt-3d-shell.on{display:block;}
.vt-3d-canvas{width:100%; height:100%; min-height:520px;}
.vt-3d-canvas canvas{display:block; width:100%; height:100%;}
.vt-3d-hud{position:absolute; left:12px; top:12px; z-index:3; display:flex; gap:7px; flex-wrap:wrap; pointer-events:none;}
.vt-3d-pill{padding:7px 9px; border:1px solid rgba(255,255,255,.14); border-radius:999px; color:rgba(255,255,255,.82); background:rgba(7,10,18,.52); backdrop-filter:blur(8px); font:700 10px var(--font-body);}
.vt-3d-info{position:absolute; right:12px; top:12px; width:min(280px,calc(100% - 24px)); z-index:3; padding:12px 14px; border:1px solid rgba(255,255,255,.12); border-radius:14px; color:rgba(255,255,255,.86); background:rgba(7,10,18,.5); backdrop-filter:blur(10px);}
.vt-3d-info strong{display:block;font:800 12px var(--font-display);letter-spacing:.06em;text-transform:uppercase;margin-bottom:5px;color:#fff}
.vt-3d-info span{font:500 11px/1.45 var(--font-body);color:rgba(255,255,255,.7)}
.vt-3d-center{position:absolute; inset:0; display:flex; align-items:center; justify-content:center; pointer-events:none; z-index:2;}
.vt-3d-loading{padding:12px 16px; border:1px solid rgba(255,255,255,.12); border-radius:12px; color:#fff; background:rgba(7,10,18,.68); backdrop-filter:blur(10px); font:700 12px var(--font-body);}
.vt-hybrid{display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:12px; align-items:stretch;}
.vt-hybrid .vt-preview,.vt-hybrid .vt-3d-shell{display:block!important}
.vt-hybrid .vt-3d-shell{min-height:460px}
.vt-hybrid .vt-3d-canvas{min-height:460px}
.vt-mode-2d .vt-3d-shell{display:none}
.vt-mode-3d .vt-preview{display:none!important}
.vt-mode-3d .vt-3d-shell{display:block!important}
.vt-mode-hybrid .vt-workspace{grid-template-columns:minmax(0,1fr)}
.vt-mode-hybrid .vt-preview{display:block}
.vt-presentation{position:fixed!important; inset:0; z-index:9999; width:100vw!important; height:100vh!important; margin:0!important; padding:18px!important; border-radius:0!important; background:#05070D!important; display:flex!important; flex-direction:column;}
.vt-presentation .vt-workspace{flex:1; min-height:0;}
.vt-presentation .vt-3d-shell{min-height:0; flex:1;}
.vt-presentation .vt-3d-canvas{min-height:0;height:100%;}
.vt-presentation .vt-preview{height:100%;}
.vt-presentation .vt-preview svg{height:100%; width:100%; object-fit:contain; background:#fff;}
.vt-presentation-close{position:fixed; top:14px; right:14px; z-index:10000; width:40px; height:40px; border-radius:50%; border:1px solid rgba(255,255,255,.15); color:#fff; background:rgba(0,0,0,.45); cursor:pointer; font-size:20px;}
.vt-mini-stat{margin-left:auto; font:700 11px var(--font-body); color:var(--ink-faint)}
.vt-empty .vt-kicker{font-size:12px; opacity:.7; margin-top:6px}
@media (max-width: 900px){
  .vt-hybrid{grid-template-columns:1fr}
  .vt-3d-shell,.vt-3d-canvas{min-height:420px}
}
@media (max-width: 640px){
  .vt-lab-toolbar{align-items:stretch}
  .vt-lab-group{width:100%}
  .vt-lab-toolbar>.vt-lab-check,
  .vt-lab-toolbar>.vt-lab-btn{flex:1 1 calc(33.333% - 6px); justify-content:center; text-align:center; padding:0 6px;}
  .vt-mini-stat{display:none}
  .vt-direction-wrap{flex-direction:column}
  .vt-direction{min-width:0; width:100%;}
  .vt-3d-shell,.vt-3d-canvas{min-height:340px}
}
.vt-feature-ribbon{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:4px 0 18px;padding:8px;border:1px solid var(--border);border-radius:16px;background:color-mix(in srgb,var(--surface) 92%,var(--accent) 8%);box-shadow:var(--shadow-sm)}
.vt-feature-ribbon>div{padding:11px 12px;border-radius:11px;background:var(--surface);border:1px solid color-mix(in srgb,var(--border) 75%,transparent);display:flex;flex-direction:column;gap:3px}
.vt-feature-ribbon b{font:800 12px var(--font-display);color:var(--ink)}
.vt-feature-ribbon span{font:600 10.5px var(--font-body);color:var(--ink-faint)}
@media(max-width:780px){.vt-feature-ribbon{grid-template-columns:repeat(2,minmax(0,1fr));}}

/* REAL-TIME 3D MODEL LAB */
.vt-3d-shell{background:
  radial-gradient(circle at 18% 16%, color-mix(in srgb,var(--accent) 18%, transparent), transparent 34%),
  radial-gradient(circle at 82% 25%, rgba(55,180,255,.13), transparent 30%),
  linear-gradient(180deg,#050812 0%,#02050b 100%);
  box-shadow:inset 0 0 70px rgba(55,145,255,.08), 0 20px 60px rgba(0,0,0,.18);
}
.vt-lab-select.vt-model{min-width:150px;max-width:210px;background:linear-gradient(180deg,#111a2a,#0c1220);color:#dce9ff;border-color:rgba(118,170,255,.28)}
.vt-3d-hud{gap:6px}
.vt-3d-pill{background:linear-gradient(135deg,rgba(78,140,255,.17),rgba(160,84,255,.12));border-color:rgba(118,181,255,.25);box-shadow:0 0 24px rgba(76,145,255,.08)}
.vt-model-badge{position:absolute;left:14px;bottom:14px;z-index:4;padding:9px 12px;border:1px solid rgba(130,190,255,.2);border-radius:12px;background:rgba(3,7,15,.55);backdrop-filter:blur(12px);color:#dff2ff;font:800 10px var(--font-display);letter-spacing:.08em;text-transform:uppercase}
.vt-3d-info{box-shadow:0 14px 40px rgba(0,0,0,.24);border-color:rgba(130,190,255,.2)}