/* ============================================================
   3D.SUDHANVASP — instant fabrication quote engine
   Same atelier language as the portfolio: bone paper, ink, vermilion.
   ============================================================ */

:root{
  --paper:    #E5E1D4;
  --paper-2:  #DEDAC9;
  --ink:      #1A1814;
  --ink-soft: #56524A;
  --ink-mute: #847F73;
  --line:     rgba(26,24,20,0.16);
  --line-2:   rgba(26,24,20,0.28);
  --accent:   #D2451E;
  --ok:       #3F7A5A;

  --ff-display: 'Archivo', -apple-system, sans-serif;
  --ff-mono: 'JetBrains Mono', ui-monospace, monospace;

  --maxw: 1360px;
  --gut: 40px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--ff-display);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

::selection{ background:var(--accent); color:var(--paper); }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; cursor:pointer; border:none; background:none; }
canvas{ display:block; }
input[type="range"]{ font-family:inherit; }

.noise{
  position:fixed; inset:0; pointer-events:none; z-index:2; opacity:0.045;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0naHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmcnIHdpZHRoPScxNjAnIGhlaWdodD0nMTYwJz48ZmlsdGVyIGlkPSduJz48ZmVUdXJidWxlbmNlIHR5cGU9J2ZyYWN0YWxOb2lzZScgYmFzZUZyZXF1ZW5jeT0nMC44NScgbnVtT2N0YXZlcz0nMicgc3RpdGNoVGlsZXM9J3N0aXRjaCcvPjwvZmlsdGVyPjxyZWN0IHdpZHRoPScxMDAlJyBoZWlnaHQ9JzEwMCUnIGZpbHRlcj0ndXJsKCNuKScvPjwvc3ZnPg==");
}

.wrap{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 var(--gut); position:relative; }
.eyebrow{
  font-family:var(--ff-mono); font-size:11px; font-weight:500;
  letter-spacing:0.22em; text-transform:uppercase; color:var(--ink-soft);
}
.mono{ font-family:var(--ff-mono); }
.rule{ height:1px; background:var(--line); width:100%; border:none; }

/* ---- topbar ------------------------------------------------ */
.topbar{
  position:sticky; top:0; z-index:200; background:rgba(229,225,212,0.86);
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar .in{
  display:flex; align-items:center; justify-content:space-between;
  padding:18px var(--gut);
}
.brand{ display:flex; align-items:baseline; gap:10px; font-family:var(--ff-mono); font-size:13px; letter-spacing:0.12em; text-transform:uppercase; }
.brand b{ color:var(--accent); font-weight:700; }
.topbar nav{ display:flex; gap:28px; font-family:var(--ff-mono); font-size:12px; letter-spacing:0.1em; color:var(--ink-soft); }
.topbar nav a:hover{ color:var(--ink); }

/* ---- hero ---------------------------------------------------*/
.hero{ padding:72px var(--gut) 48px; }
.hero h1{
  font-family:var(--ff-display); font-weight:900; letter-spacing:-0.03em;
  line-height:0.96; font-size:clamp(38px, 6vw, 76px); max-width:920px;
}
.hero h1 em{ font-style:normal; color:var(--accent); }
.hero p{ margin-top:20px; max-width:560px; font-size:16px; line-height:1.6; color:var(--ink-soft); }
.hero .rates{ margin-top:32px; display:flex; gap:28px; flex-wrap:wrap; }
.rate-chip{ font-family:var(--ff-mono); font-size:12px; letter-spacing:0.08em; padding:8px 14px; border:1px solid var(--line-2); border-radius:999px; display:flex; gap:8px; align-items:center; }
.rate-chip b{ color:var(--accent); }

/* ---- tool section --------------------------------------------*/
.tool{ padding:24px var(--gut) 100px; }
.tool-grid{
  display:grid; grid-template-columns: 1.15fr 1fr; gap:28px;
  align-items:start;
}
@media (max-width: 900px){ .tool-grid{ grid-template-columns:1fr; } }

.panel{
  background:var(--paper-2); border:1px solid var(--line-2); border-radius:4px;
  overflow:hidden;
}

/* viewer */
.viewer-panel{ position:relative; min-height:460px; display:flex; flex-direction:column; }
.viewer-head{ display:flex; align-items:center; justify-content:space-between; padding:16px 20px; border-bottom:1px solid var(--line); }
.viewer-head .idx{ font-family:var(--ff-mono); font-size:11px; letter-spacing:0.18em; color:var(--accent); font-weight:700; text-transform:uppercase; }
.viewer-stage{ position:relative; flex:1; min-height:380px; }
#viewer-canvas{ width:100%; height:100%; }

.dropzone{
  position:absolute; inset:16px; z-index:5;
  border:1.5px dashed var(--line-2); border-radius:4px;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:10px;
  text-align:center; padding:24px; background:rgba(229,225,212,0.55);
  transition:border-color .25s, background .25s;
  cursor:pointer;
}
.dropzone.drag{ border-color:var(--accent); background:rgba(210,69,30,0.08); }
.dropzone.has-file{ pointer-events:none; opacity:0; }
.dropzone .dz-title{ font-weight:700; font-size:17px; }
.dropzone .dz-sub{ font-family:var(--ff-mono); font-size:12px; color:var(--ink-mute); letter-spacing:0.04em; }
.dropzone .dz-btn{
  margin-top:6px; font-family:var(--ff-mono); font-size:11px; letter-spacing:0.14em; text-transform:uppercase;
  padding:10px 18px; border:1px solid var(--ink); border-radius:999px; pointer-events:auto;
}
.dropzone .dz-btn:hover{ background:var(--ink); color:var(--paper); }

.viewer-foot{ display:flex; justify-content:space-between; padding:12px 20px; border-top:1px solid var(--line); font-family:var(--ff-mono); font-size:11px; color:var(--ink-mute); letter-spacing:0.06em; }
.viewer-foot .fname{ color:var(--ink); max-width:60%; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.viewer-foot .clear-btn{ font-family:var(--ff-mono); font-size:11px; letter-spacing:0.1em; color:var(--accent); text-transform:uppercase; }
.viewer-foot .clear-btn:hover{ text-decoration:underline; }

/* stats row under viewer */
.stat-row{ display:grid; grid-template-columns:repeat(4,1fr); border-top:1px solid var(--line); }
.stat-cell{ padding:14px 16px; border-right:1px solid var(--line); }
.stat-cell:last-child{ border-right:none; }
.stat-cell .k{ font-family:var(--ff-mono); font-size:10px; letter-spacing:0.14em; text-transform:uppercase; color:var(--ink-mute); }
.stat-cell .v{ margin-top:4px; font-family:var(--ff-mono); font-size:16px; font-weight:500; }
@media (max-width:560px){ .stat-row{ grid-template-columns:repeat(2,1fr); } }

/* config + quote panel */
.config-panel{ padding:20px 22px 24px; }
.config-panel .idx{ font-family:var(--ff-mono); font-size:11px; letter-spacing:0.18em; color:var(--accent); font-weight:700; text-transform:uppercase; }

.infill-row{ margin-top:22px; }
.infill-row .lbl{ display:flex; justify-content:space-between; font-family:var(--ff-mono); font-size:12px; letter-spacing:0.06em; color:var(--ink-soft); margin-bottom:8px; }
.infill-row .lbl b{ color:var(--ink); }
input[type="range"].slider{
  -webkit-appearance:none; appearance:none; width:100%; height:2px; background:var(--line-2); outline:none; border-radius:2px;
}
input[type="range"].slider::-webkit-slider-thumb{
  -webkit-appearance:none; width:16px; height:16px; border-radius:50%; background:var(--accent); cursor:pointer; border:2px solid var(--paper-2);
  box-shadow:0 0 0 1px var(--accent);
}
input[type="range"].slider::-moz-range-thumb{
  width:16px; height:16px; border-radius:50%; background:var(--accent); cursor:pointer; border:2px solid var(--paper-2); box-shadow:0 0 0 1px var(--accent);
}

.materials{ margin-top:26px; display:flex; flex-direction:column; gap:10px; }
.mat-card{
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding:14px 16px; border:1px solid var(--line-2); border-radius:4px; background:var(--paper);
  cursor:pointer; transition:border-color .2s, background .2s;
}
.mat-card:hover{ border-color:var(--ink-mute); }
.mat-card.sel{ border-color:var(--accent); background:rgba(210,69,30,0.06); }
.mat-card .m-l{ display:flex; align-items:center; gap:12px; }
.mat-swatch{ width:14px; height:14px; border-radius:50%; flex-shrink:0; }
.mat-name{ font-weight:700; font-size:14px; }
.mat-sub{ font-family:var(--ff-mono); font-size:11px; color:var(--ink-mute); letter-spacing:0.04em; }
.mat-price{ font-family:var(--ff-mono); font-size:18px; font-weight:500; text-align:right; }
.mat-price small{ display:block; font-size:10px; color:var(--ink-mute); font-weight:400; letter-spacing:0.06em; }

.quote-total{
  margin-top:22px; padding:20px; border-radius:4px; background:var(--ink); color:var(--paper);
  display:flex; align-items:flex-end; justify-content:space-between; gap:12px;
}
.quote-total .qt-l .eyebrow{ color:rgba(229,225,212,0.55); }
.quote-total .qt-l .mat{ margin-top:6px; font-weight:700; font-size:16px; }
.quote-total .qt-r{ text-align:right; }
.quote-total .amt{ font-family:var(--ff-mono); font-size:clamp(28px,4vw,40px); font-weight:600; line-height:1; }
.quote-total .amt small{ font-size:14px; opacity:0.6; margin-right:2px; }
.quote-total .note{ margin-top:4px; font-family:var(--ff-mono); font-size:10px; letter-spacing:0.06em; opacity:0.55; }

.empty-note{ margin-top:22px; font-family:var(--ff-mono); font-size:12px; color:var(--ink-mute); line-height:1.7; border-top:1px dashed var(--line-2); padding-top:16px; }

.phase2{
  margin-top:18px; padding:14px 16px; border:1px dashed var(--line-2); border-radius:4px;
  font-family:var(--ff-mono); font-size:11px; letter-spacing:0.04em; color:var(--ink-mute); line-height:1.6;
}
.phase2 b{ color:var(--ink-soft); }

/* ---- assumptions / footer -------------------------------------*/
.assumptions{ padding:0 var(--gut) 80px; }
.assumptions .box{ border-top:1px solid var(--ink); padding-top:18px; }
.assumptions ul{ list-style:none; margin-top:14px; display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
@media (max-width:800px){ .assumptions ul{ grid-template-columns:1fr; } }
.assumptions li{ font-family:var(--ff-mono); font-size:12px; color:var(--ink-soft); line-height:1.6; padding-right:12px; }
.assumptions li b{ display:block; color:var(--ink); font-size:12px; letter-spacing:0.04em; margin-bottom:4px; }

footer{ padding:28px var(--gut) 40px; border-top:1px solid var(--line); }
footer .in{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px; }
footer .mono{ font-size:11px; letter-spacing:0.08em; color:var(--ink-mute); }
footer a:hover{ color:var(--accent); }

/* toast (error) */
.toast{
  position:fixed; left:50%; bottom:28px; transform:translateX(-50%) translateY(20px);
  background:var(--ink); color:var(--paper); font-family:var(--ff-mono); font-size:12px; letter-spacing:0.04em;
  padding:12px 20px; border-radius:4px; z-index:500; opacity:0; pointer-events:none;
  transition:opacity .3s var(--ease), transform .3s var(--ease);
  border:1px solid var(--accent);
}
.toast.show{ opacity:1; transform:translateX(-50%) translateY(0); }