/* ---------- Tokens ---------- */
:root{
  --paper: #F3F4F0;
  --paper-raised: #FFFFFF;
  --ink: #14151A;
  --ink-soft: #55575E;
  --line: #DADBD4;
  --line-strong: #B9BAB2;
  --accent: #FF2D2D;
  --accent-ink: #FFFFFF;
  --grid-dot: #00000012;
  --shadow: 0 1px 0 rgba(20,21,26,0.04);
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

[data-theme="dark"]{
  --paper: #101114;
  --paper-raised: #17181D;
  --ink: #ECEDEA;
  --line: #2A2C33;
  --line-strong: #3C3F47;
  --ink-soft: #9C9EA5;
  --accent: #FF3B3B;
  --accent-ink: #101114;
  --grid-dot: #FFFFFF14;
  --shadow: 0 1px 0 rgba(0,0,0,0.3);
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  background:
    radial-gradient(var(--grid-dot) 1.4px, transparent 1.4px) 0 0/22px 22px,
    var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  transition: background-color .35s ease, color .35s ease;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

::selection{ background: var(--accent); color: var(--accent-ink); }

/* ambient scanline texture over whole page, very subtle */
.scanlines{
  position:fixed; inset:0; pointer-events:none; z-index:0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,0.012) 3px,
    rgba(0,0,0,0.012) 4px
  );
  mix-blend-mode: multiply;
}
[data-theme="dark"] .scanlines{
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(255,255,255,0.015) 3px,
    rgba(255,255,255,0.015) 4px
  );
  mix-blend-mode: screen;
}

/* ---------- Topbar ---------- */
.topbar{
  position:relative; z-index:2;
  display:flex; align-items:center; justify-content:space-between;
  padding: 22px clamp(20px, 5vw, 56px) 0;
}
.brand{ display:flex; align-items:center; gap:10px; font-family: var(--font-mono); }
.brand-mark{ font-size:18px; color: var(--accent); }
.brand-text{ font-size:13px; letter-spacing: .12em; font-weight:500; }
.brand-slash{ color: var(--ink-soft); margin: 0 1px; }

.theme-toggle{
  display:flex; align-items:center; gap:10px;
  background:none; border:none; cursor:pointer;
  font-family: var(--font-mono); font-size:11px; letter-spacing:.1em;
  color: var(--ink-soft);
  padding: 6px;
}
.theme-toggle-track{
  width:38px; height:20px; border-radius:20px;
  background: var(--paper-raised);
  border:1px solid var(--line-strong);
  position:relative;
  transition: background-color .2s ease;
}
.theme-toggle-thumb{
  position:absolute; top:2px; left:2px;
  width:14px; height:14px; border-radius:50%;
  background: var(--ink);
  transition: transform .25s ease, background-color .2s ease;
}
[data-theme="dark"] .theme-toggle-thumb{
  transform: translateX(18px);
  background: var(--accent);
}

/* ---------- Layout ---------- */
.layout{
  position:relative; z-index:1;
  flex:1;
  display:grid;
  grid-template-columns: minmax(320px, 460px) minmax(320px, 460px);
  gap: 28px;
  justify-content:center;
  align-content:center;
  padding: 40px clamp(20px, 5vw, 56px);
}

.panel{
  background: var(--paper-raised);
  border:1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}

.eyebrow{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--accent);
  margin-bottom: 14px;
}

.title{
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 28px);
  line-height: 1.25;
  font-weight: 600;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}
.subtitle{
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.5;
  margin: 0 0 28px;
  max-width: 38ch;
}

/* ---------- Fields ---------- */
.field{ margin-bottom: 22px; }
.field-label{
  display:block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-soft);
  margin-bottom: 8px;
  text-transform: uppercase;
}
.field-input{
  width:100%;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--ink);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field-input:focus{
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
.hex-row:focus-within{
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
.field-input--num{ max-width: 160px; }
.field-inline{ display:flex; gap:16px; }

.swatches{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:12px;
}
.swatch{
  width:30px; height:30px; border-radius:50%;
  background: var(--sw);
  border: 2px solid transparent;
  cursor:pointer;
  position:relative;
  transition: transform .12s ease;
}
.swatch:hover{ transform: scale(1.08); }
.swatch.active{
  border-color: var(--paper-raised);
  box-shadow: 0 0 0 2px var(--sw);
}
.custom-swatches{ display:contents; }
.palette-swatch{
  position:relative;
  width:30px;
  height:30px;
  flex:0 0 30px;
}
.palette-swatch .swatch{ display:block; }
.swatch-remove{
  position:absolute;
  top:-6px;
  right:-6px;
  z-index:2;
  width:16px;
  height:16px;
  padding:0;
  border:1px solid var(--paper-raised);
  border-radius:50%;
  background:var(--ink);
  color:var(--paper-raised);
  font-family:var(--font-sans);
  font-size:12px;
  line-height:14px;
  cursor:pointer;
  opacity:0;
  transform:scale(.8);
  transition:opacity .12s ease, transform .12s ease;
}
.palette-swatch:hover .swatch-remove,
.palette-swatch:focus-within .swatch-remove{
  opacity:1;
  transform:scale(1);
}
.swatch-add,
.swatch-restore{
  --sw: transparent;
  border:1px dashed var(--line-strong);
  background:transparent;
  color:var(--ink-soft);
  font-family:var(--font-mono);
  font-size:18px;
  line-height:1;
}
.swatch-add:hover{
  border-color:var(--ink);
  color:var(--ink);
  transform:scale(1.05);
}
.swatch-restore{
  border-style:solid;
  font-size:15px;
}
.swatch-restore:hover{
  border-color:var(--ink);
  color:var(--ink);
  transform:rotate(-35deg);
}
.palette-status{
  min-height:0;
  margin:8px 0 0;
  color:var(--ink-soft);
  font-family:var(--font-mono);
  font-size:10px;
  line-height:1.45;
}
.palette-status:empty{ display:none; }
.palette-status.is-error{ color:var(--accent); }

.hex-row{
  display:flex; align-items:center;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 4px 4px 4px 14px;
  gap: 8px;
}
.hex-prefix{ font-family: var(--font-mono); color: var(--ink-soft); font-size:14px; }
.hex-input{
  border:none; background:none; outline:none;
  font-family: var(--font-mono);
  font-size: 14px; letter-spacing: .04em;
  color: var(--ink);
  flex:1; min-width:0;
  padding: 8px 0;
  text-transform: uppercase;
}
.hex-preview{
  width: 30px; height: 30px; border-radius: var(--radius-sm) calc(var(--radius-sm) - 4px) calc(var(--radius-sm) - 4px) var(--radius-sm);
  background: var(--hp, #141414);
  flex-shrink:0;
}

.paint-mode{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:6px;
  margin-top:12px;
  padding:3px;
  border-radius:var(--radius-sm);
  background:var(--paper);
  border:1px solid var(--line);
}
.paint-mode-option{
  border:0;
  border-radius:6px;
  padding:8px 10px;
  background:transparent;
  color:var(--ink-soft);
  font-family:var(--font-mono);
  font-size:10px;
  cursor:pointer;
}
.paint-mode-option.active{
  background:var(--paper-raised);
  color:var(--ink);
  box-shadow:0 1px 4px rgba(20,21,26,.09);
}
.paint-mode-option:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:1px;
}
.gradient-controls{
  margin-top:12px;
  padding:12px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:color-mix(in srgb, var(--paper) 72%, transparent);
}
.field-label--nested{ margin-top:0; }
.angle-control{ margin-top:12px; }
.angle-label{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:6px;
  color:var(--ink-soft);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.04em;
  text-transform:uppercase;
}
.angle-label output{ color:var(--ink); }
.angle-range{
  width:100%;
  accent-color:var(--accent);
  cursor:pointer;
}
.field-label-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:8px;
}
.field-label-row .field-label{ margin-bottom:0; }
.check-control{
  display:flex;
  align-items:center;
  gap:6px;
  color:var(--ink-soft);
  font-family:var(--font-mono);
  font-size:10px;
  cursor:pointer;
}
.check-control input{ accent-color:var(--accent); }
.eye-color-controls{
  transition:opacity .15s ease;
}
.eye-color-controls.is-disabled{ opacity:.48; }
.hex-input:disabled{ cursor:not-allowed; }

.style-picker{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap:8px;
}
.style-option{
  min-width:0;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:7px;
  padding:10px 8px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-sm);
  background:var(--paper);
  color:var(--ink-soft);
  font-family:var(--font-mono);
  font-size:10px;
  cursor:pointer;
  transition:background-color .15s ease, color .15s ease, border-color .15s ease, transform .12s ease;
}
.style-option:hover{ transform:translateY(-1px); color:var(--ink); }
.style-option:focus-visible{
  outline:3px solid color-mix(in srgb, var(--accent) 22%, transparent);
  outline-offset:2px;
}
.style-option.active{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper-raised);
}
.style-option-icon{
  font-size:12px;
  line-height:1;
  letter-spacing:-.08em;
}
.style-option-icon--soft{
  font-size:18px;
  font-weight:600;
  transform:rotate(-8deg);
}
.style-option-icon--dots{
  letter-spacing:-.18em;
  padding-right:.18em;
}

.download-row{ display:flex; gap:10px; }
.btn{
  flex:1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  cursor:pointer;
  transition: transform .12s ease, opacity .15s ease;
  display:flex; align-items:center; justify-content:center;
  gap:8px;
}
.btn:hover{ transform: translateY(-1px); }
.btn:active{ transform: translateY(0); }
.btn-solid{
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
}
.btn-ghost{
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
}
.btn[disabled]{ opacity:.4; cursor:not-allowed; transform:none; }
.field-error{
  margin: 10px 0 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
}

/* ---------- Preview / viewfinder ---------- */
.preview-panel{ display:flex; flex-direction:column; }
.viewfinder{
  position:relative;
  flex:1;
  min-height: 340px;
  border-radius: var(--radius-md);
  background: var(--paper);
  border: 1px solid var(--line);
  display:flex; align-items:center; justify-content:center;
  overflow:hidden;
  padding: 28px;
}
.corner{
  position:absolute;
  width: 22px; height: 22px;
  border: 2.5px solid var(--ink);
  opacity: .55;
}
.corner-tl{ top:14px; left:14px; border-right:none; border-bottom:none; border-radius: 4px 0 0 0;}
.corner-tr{ top:14px; right:14px; border-left:none; border-bottom:none; border-radius: 0 4px 0 0;}
.corner-bl{ bottom:14px; left:14px; border-right:none; border-top:none; border-radius: 0 0 0 4px;}
.corner-br{ bottom:14px; right:14px; border-left:none; border-top:none; border-radius: 0 0 4px 0;}

.scan-sweep{
  position:absolute;
  left:14px; right:14px; top:14px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent) 20%, var(--accent) 80%, transparent);
  box-shadow: 0 0 12px 1px var(--accent);
  opacity:0;
  pointer-events:none;
}
.scan-sweep.sweeping{
  animation: sweep 0.7s cubic-bezier(.4,0,.2,1);
}
@keyframes sweep{
  0%{ opacity:0; top:14px; }
  10%{ opacity: 1; }
  90%{ opacity: 1; }
  100%{ opacity:0; top: calc(100% - 16px); }
}

.qr-stage{
  width:100%; height:100%;
  display:flex; align-items:center; justify-content:center;
}
.qr-stage canvas, .qr-stage svg{
  max-width:100%; height:auto !important;
  border-radius: 10px;
}

.qr-empty{
  text-align:center;
  color: var(--ink-soft);
}
.qr-empty-glyph{
  font-size: 34px;
  color: var(--line-strong);
  margin-bottom: 10px;
  letter-spacing: .1em;
}
.qr-empty-text{
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
}

.meta-row{
  display:flex; align-items:center; gap:8px;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: .04em;
}
.meta-dot{ opacity:.5; }

/* ---------- Footer ---------- */
.footer{
  position:relative; z-index:1;
  text-align:center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: .06em;
  padding: 18px 20px 26px;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px){
  .layout{
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
}
@media (max-width: 480px){
  .panel{ padding: 24px 20px; }
  .field-inline{ flex-wrap:wrap; }
  .style-option{ flex-direction:column; gap:5px; padding:9px 4px; }
}
@media (hover: none){
  .palette-swatch .swatch-remove{
    opacity:1;
    transform:scale(1);
  }
}

@media (prefers-reduced-motion: reduce){
  .scan-sweep.sweeping{ animation: none; opacity:0; }
  .btn:hover{ transform:none; }
}