/* ==========================================================================
   Chhimwal.com — Professional Tool Framework (cwt- namespace)
   A shared app shell used by every interactive tool so they look and behave
   like one polished product: toolbar, side panels, canvas stage, buttons,
   toasts, modals, tabs. Theme matches the site's navy + amber palette.
   ========================================================================== */
:root{
  --cwt-navy:#0b1220; --cwt-navy2:#111827; --cwt-slate:#1f2937;
  --cwt-amber:#fbbf24; --cwt-amber-d:#f59e0b; --cwt-amber-dd:#b45309;
  --cwt-ink:#0f172a; --cwt-muted:#64748b; --cwt-line:#e5e7eb;
  --cwt-bg:#f8fafc; --cwt-panel:#ffffff; --cwt-ok:#16a34a; --cwt-danger:#dc2626;
  --cwt-radius:14px; --cwt-radius-sm:10px;
  --cwt-shadow:0 10px 30px rgba(2,6,23,.08),0 2px 8px rgba(2,6,23,.05);
  --cwt-font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
}

.cwt-app *{box-sizing:border-box;}
.cwt-app{
  font-family:var(--cwt-font);
  max-width:1280px;margin:2rem auto;padding:0 1rem;color:var(--cwt-ink);
}
.cwt-app h1,.cwt-app h2,.cwt-app h3{margin:0;letter-spacing:-.01em;}

/* Tool intro header inside the app */
.cwt-head{margin:0 0 1rem;}
.cwt-head h1{font-size:clamp(1.5rem,3.5vw,2.1rem);font-weight:800;color:var(--cwt-navy);}
.cwt-head p{margin:.5rem 0 0;color:var(--cwt-muted);font-size:1.02rem;max-width:70ch;line-height:1.55;}

/* Shell: toolbar + workspace */
.cwt-shell{
  background:var(--cwt-panel);border:1px solid var(--cwt-line);
  border-radius:var(--cwt-radius);box-shadow:var(--cwt-shadow);overflow:hidden;
}
.cwt-toolbar{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;
  padding:.7rem .8rem;background:linear-gradient(135deg,var(--cwt-navy),var(--cwt-slate));
  color:#e5e7eb;
}
.cwt-toolbar .cwt-group{display:flex;align-items:center;gap:.4rem;padding:0 .2rem;}
.cwt-toolbar .cwt-sep{width:1px;height:26px;background:rgba(255,255,255,.15);margin:0 .25rem;}
.cwt-toolbar .cwt-spacer{flex:1 1 auto;}
.cwt-tlabel{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:#94a3b8;margin-right:.15rem;}

/* Workspace grid: sidebar + stage + optional right panel */
.cwt-workspace{display:grid;grid-template-columns:250px 1fr;gap:0;min-height:520px;}
.cwt-workspace.cwt-has-right{grid-template-columns:230px 1fr 260px;}
.cwt-sidebar{background:var(--cwt-bg);border-right:1px solid var(--cwt-line);padding:1rem;overflow:auto;}
.cwt-rightbar{background:var(--cwt-bg);border-left:1px solid var(--cwt-line);padding:1rem;overflow:auto;}
.cwt-stage{position:relative;background:
    repeating-conic-gradient(#f1f5f9 0% 25%, #ffffff 0% 50%) 50%/22px 22px;
  overflow:auto;display:flex;align-items:center;justify-content:center;min-height:520px;}
.cwt-stage canvas{background:#fff;box-shadow:0 4px 18px rgba(2,6,23,.12);border-radius:6px;touch-action:none;}

/* Buttons */
.cwt-btn{
  --b:#fff;--f:#0f172a;--bd:#cbd5e1;
  display:inline-flex;align-items:center;gap:.4rem;justify-content:center;
  font-family:inherit;font-size:.86rem;font-weight:600;line-height:1;
  padding:.55rem .8rem;border-radius:var(--cwt-radius-sm);border:1px solid var(--bd);
  background:var(--b);color:var(--f);cursor:pointer;white-space:nowrap;
  transition:transform .12s ease,box-shadow .12s ease,background .12s ease,filter .12s ease;
}
.cwt-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(2,6,23,.12);}
.cwt-btn:active{transform:translateY(0);}
.cwt-btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.cwt-btn.cwt-primary{--b:linear-gradient(135deg,var(--cwt-amber),var(--cwt-amber-d));--f:#0b1220;--bd:transparent;font-weight:800;}
.cwt-btn.cwt-ghost{--b:transparent;--f:#e5e7eb;--bd:rgba(255,255,255,.25);}
.cwt-btn.cwt-ghost:hover{--b:rgba(255,255,255,.08);}
.cwt-btn.cwt-danger{--b:#fff;--f:var(--cwt-danger);--bd:#fecaca;}
.cwt-btn.cwt-icon{padding:.5rem .6rem;font-size:1rem;}
.cwt-btn.cwt-sm{padding:.4rem .6rem;font-size:.8rem;}
.cwt-btn.cwt-block{width:100%;}

/* Tool/mode chips (active tool selection) */
.cwt-tools{display:flex;flex-wrap:wrap;gap:.4rem;}
.cwt-tool{
  display:flex;flex-direction:column;align-items:center;gap:.25rem;
  width:64px;padding:.55rem .3rem;border-radius:var(--cwt-radius-sm);
  border:1px solid var(--cwt-line);background:#fff;cursor:pointer;font-size:.72rem;
  color:#334155;transition:all .12s ease;
}
.cwt-tool .cwt-ico{font-size:1.25rem;line-height:1;}
.cwt-tool:hover{border-color:var(--cwt-amber-d);}
.cwt-tool.cwt-active{background:var(--cwt-navy);color:#fff;border-color:var(--cwt-navy);box-shadow:0 4px 12px rgba(2,6,23,.2);}

/* Panels & fields */
.cwt-panel-title{font-size:.74rem;font-weight:800;text-transform:uppercase;letter-spacing:.07em;color:var(--cwt-muted);margin:0 0 .6rem;}
.cwt-field{margin-bottom:.85rem;}
.cwt-field label{display:block;font-size:.8rem;font-weight:600;color:#334155;margin-bottom:.3rem;}
.cwt-field .cwt-hint{font-size:.72rem;color:var(--cwt-muted);font-weight:400;}
.cwt-input,.cwt-select,.cwt-app select,.cwt-app input[type=number],.cwt-app input[type=text]{
  width:100%;padding:.5rem .6rem;border:1px solid var(--cwt-line);border-radius:10px;
  font-family:inherit;font-size:.9rem;background:#fff;color:var(--cwt-ink);
}
.cwt-input:focus,.cwt-select:focus{outline:none;border-color:var(--cwt-amber-d);box-shadow:0 0 0 3px rgba(245,158,11,.15);}
.cwt-row{display:flex;gap:.5rem;}
.cwt-row>*{flex:1;}
.cwt-range{width:100%;accent-color:var(--cwt-amber-d);}
.cwt-swatch-row{display:flex;flex-wrap:wrap;gap:.4rem;}
.cwt-swatch{width:28px;height:28px;border-radius:8px;border:2px solid #fff;box-shadow:0 0 0 1px var(--cwt-line);cursor:pointer;}
.cwt-swatch.cwt-active{box-shadow:0 0 0 2px var(--cwt-amber-d);transform:scale(1.08);}

/* Stat / result cards */
.cwt-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:.6rem;margin:.4rem 0 1rem;}
.cwt-stat{background:#fff;border:1px solid var(--cwt-line);border-radius:12px;padding:.7rem .8rem;}
.cwt-stat .cwt-k{font-size:.72rem;color:var(--cwt-muted);text-transform:uppercase;letter-spacing:.05em;}
.cwt-stat .cwt-v{font-size:1.3rem;font-weight:800;color:var(--cwt-navy);margin-top:.15rem;}
.cwt-stat .cwt-v small{font-size:.8rem;font-weight:600;color:var(--cwt-muted);}

/* Tabs */
.cwt-tabs{display:flex;gap:.25rem;border-bottom:1px solid var(--cwt-line);margin-bottom:1rem;flex-wrap:wrap;}
.cwt-tab{padding:.55rem .9rem;border:none;background:none;font-family:inherit;font-weight:700;font-size:.9rem;
  color:var(--cwt-muted);cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-1px;}
.cwt-tab:hover{color:var(--cwt-navy);}
.cwt-tab.cwt-active{color:var(--cwt-amber-dd);border-bottom-color:var(--cwt-amber-d);}
.cwt-tabpane{display:none;}
.cwt-tabpane.cwt-active{display:block;animation:cwt-fade .25s ease;}
@keyframes cwt-fade{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:none;}}

/* Toast notifications */
.cwt-toasts{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:11000;display:flex;flex-direction:column;gap:.5rem;align-items:center;pointer-events:none;}
.cwt-toast{background:var(--cwt-navy);color:#fff;padding:.7rem 1.1rem;border-radius:999px;font-size:.88rem;font-weight:600;
  box-shadow:0 10px 30px rgba(2,6,23,.35);opacity:0;transform:translateY(12px);transition:all .28s ease;display:flex;gap:.5rem;align-items:center;}
.cwt-toast.cwt-show{opacity:1;transform:none;}
.cwt-toast.cwt-ok{background:#065f46;}
.cwt-toast.cwt-err{background:#7f1d1d;}

/* Modal */
.cwt-modal{position:fixed;inset:0;z-index:10500;display:none;align-items:center;justify-content:center;padding:1rem;background:rgba(11,18,32,.55);backdrop-filter:blur(3px);}
.cwt-modal.cwt-open{display:flex;}
.cwt-modal-card{background:#fff;border-radius:16px;max-width:520px;width:100%;padding:1.5rem;box-shadow:0 24px 70px rgba(2,6,23,.4);}
.cwt-modal-card h3{font-size:1.2rem;color:var(--cwt-navy);margin-bottom:.6rem;}

/* Empty-state hint on stage */
.cwt-hint-badge{position:absolute;top:12px;left:12px;background:rgba(15,23,42,.82);color:#fff;font-size:.78rem;padding:.4rem .7rem;border-radius:999px;pointer-events:none;z-index:5;}

/* Legend / help */
.cwt-help{font-size:.8rem;color:var(--cwt-muted);line-height:1.5;margin-top:.6rem;}
.cwt-kbd{display:inline-block;background:#fff;border:1px solid var(--cwt-line);border-bottom-width:2px;border-radius:6px;padding:.05rem .35rem;font-size:.75rem;font-family:ui-monospace,monospace;color:#334155;}

/* Responsive: collapse to stacked layout */
@media (max-width:860px){
  .cwt-workspace,.cwt-workspace.cwt-has-right{grid-template-columns:1fr;}
  .cwt-sidebar,.cwt-rightbar{border:none;border-bottom:1px solid var(--cwt-line);max-height:none;}
  .cwt-rightbar{border-top:1px solid var(--cwt-line);}
  .cwt-stage{min-height:380px;}
  .cwt-app{margin:1rem auto;}
}
@media (max-width:520px){
  .cwt-toolbar{gap:.35rem;padding:.55rem;}
  .cwt-btn{font-size:.8rem;padding:.5rem .6rem;}
  .cwt-tlabel{display:none;}
}
@media (prefers-reduced-motion:reduce){
  .cwt-btn,.cwt-toast,.cwt-tabpane{transition:none;animation:none;}
}