/* =========================================
   SketchPad Pro v4 — solid colors (no gradients)
   Fix: canvas no longer touches screen edges
   ========================================= */

:root{
  /* Solid palette */
  --bg0:#0B0D11;
  --bg1:#0B0D11; /* keep same to avoid gradient */
  --text:#F2F5FF;
  --muted:rgba(242,245,255,0.70);
  --muted2:rgba(242,245,255,0.46);
  --line:rgba(255,255,255,0.12);
  --line2:rgba(255,255,255,0.08);

  /* Accent (no gradient) */
  --accent:#FF5A7A;   /* pink-red */
  --accent2:#2BD4FF;  /* cyan (secondary) */
  --ok:#22C55E;

  --radius:18px;
  --radius2:14px;
  --shadow: 0 18px 60px rgba(0,0,0,0.55);

  --gridPx: 960px;
  --n: 16;
  --canvasBG: #11151D;
}

*{ box-sizing:border-box; }
html, body { height: 100%; }

body{
  margin:0;
  color:var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Inter, Roboto, Helvetica, Arial;
  background: var(--bg0); /* solid background, no gradient */
}

/* Top bar */
.topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line2);
  background: rgba(11,13,17,0.92);
  backdrop-filter: blur(10px);
}

.top-inner{
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
}

.mark{
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display:grid;
  place-items:center;
  color: rgba(255,255,255,0.92);
  background: rgba(255,90,122,0.14); /* solid tint */
  border: 1px solid rgba(255,90,122,0.25);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
}

.title{
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.4px;
}

.sub{
  margin-top: 3px;
  font-size: 12px;
  color: var(--muted);
}

.top-actions{ display:flex; gap:10px; align-items:center; }

/* Buttons */
.btn{
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  border-radius: 14px;
  padding: 10px 12px;
  cursor:pointer;
  font-size: 12px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}
.btn:hover{
  transform: translateY(-1px);
  border-color: rgba(255,90,122,0.45);
  background: rgba(255,255,255,0.06);
}
.btn:active{ transform: translateY(0); }
.btn-primary{
  background: rgba(255,90,122,0.16); /* no gradient */
  border-color: rgba(255,90,122,0.40);
}
.btn-ghost{
  background: transparent;
  border-color: var(--line2);
  color: var(--muted);
}

.i{ display:inline-flex; opacity:0.95; }

/* Layout */
.layout{
  max-width: 1280px;
  margin: 0 auto;
  padding: 22px 18px 34px; /* more outer padding so grid never touches edges */
  display:grid;
  grid-template-columns: 360px 1fr;
  gap: 16px;
}

.sidebar{ display:flex; flex-direction:column; gap:16px; }

/* Cards */
.card{
  border-radius: var(--radius);
  border: 1px solid var(--line2);
  background: rgba(255,255,255,0.03);
  box-shadow: 0 10px 40px rgba(0,0,0,0.32);
  padding: 14px;
}

.card-h{ margin-bottom: 10px; }
.card-t{ font-size: 12px; letter-spacing: 0.6px; text-transform: uppercase; color: var(--muted2); }
.card-s{ margin-top: 4px; font-size: 12px; color: var(--muted); }

/* Mode buttons */
.seg{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}

.segbtn{
  border: 1px solid var(--line2);
  background: rgba(0,0,0,0.18);
  color: var(--muted);
  border-radius: 14px;
  padding: 10px 10px;
  cursor:pointer;
  display:flex;
  align-items:center;
  gap: 8px;
  transition: border-color 140ms ease, background 140ms ease, transform 140ms ease, color 140ms ease;
  font-size: 12px;
}
.segbtn:hover{ transform: translateY(-1px); color: var(--text); border-color: rgba(43,212,255,0.30); }
.segbtn.is-active{
  color: var(--text);
  background: rgba(43,212,255,0.10);
  border-color: rgba(43,212,255,0.28);
  box-shadow: inset 0 0 0 1px rgba(255,90,122,0.12);
}

.hint{
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted2);
  line-height: 1.35;
}

/* Color pickers */
.colorRow{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 10px;
}

.colorPick{
  display:flex;
  flex-direction:column;
  gap: 8px;
  border-radius: 14px;
  border: 1px solid var(--line2);
  background: rgba(0,0,0,0.18);
  padding: 10px;
}

.cap{
  font-size: 11px;
  letter-spacing: 0.5px;
  color: var(--muted2);
  text-transform: uppercase;
}

input[type="color"]{
  width: 100%;
  height: 38px;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.swatches{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  margin-top: 10px;
}

.sw{
  width: 26px;
  height: 26px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.16);
  background: var(--c);
  cursor:pointer;
  box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}
.sw:hover{ outline: 2px solid rgba(255,90,122,0.40); outline-offset: 2px; }

.mini{
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted2);
}

/* Grid slider */
.gridCtl{ margin-top: 10px; }

.gridTop{
  display:flex;
  align-items:center;
  justify-content:space-between;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 8px;
}

.pill{
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line2);
  background: rgba(0,0,0,0.20);
  color: rgba(255,255,255,0.92);
}

input[type="range"]{
  width:100%;
  accent-color: var(--accent);
}

.btnRow{
  display:flex;
  gap: 10px;
  margin-top: 12px;
}

.status{
  margin-top: 12px;
  font-size: 12px;
  color: var(--muted2);
  border-top: 1px solid var(--line2);
  padding-top: 10px;
}

/* Canvas */
.canvasWrap{
  display:flex;
  align-items:flex-start;
  justify-content:center;
}

.canvasCard{
  width: min(100%, 980px);
  border-radius: var(--radius);
  border: 1px solid var(--line2);
  background: rgba(255,255,255,0.02);
  padding: 18px; /* more padding so grid never touches card edges */
  box-shadow: var(--shadow);
}

 .container{
  /* Responsive scaling:
     - Never exceeds 960px
     - Shrinks cleanly on smaller screens
     - Keeps perfect square via aspect-ratio
  */
  width: min(var(--gridPx), 100%);
  height: auto;
  aspect-ratio: 1 / 1;
  margin: 0 auto;

  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.12);
  background: var(--canvasBG);
  overflow:hidden;

  display:flex;
  flex-wrap: wrap;
  touch-action: none;
}

.square{
  flex: 0 0 calc(100% / var(--n));
  height: calc(100% / var(--n));
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.02);
}

.canvasFoot{
  margin-top: 12px;
  display:flex;
  justify-content: space-between;
  align-items:center;
  gap: 10px;
  font-size: 12px;
  color: var(--muted2);
}

.dot{
  width: 6px; height: 6px; border-radius: 999px;
  background: rgba(255,90,122,0.90);
  box-shadow: 0 0 0 5px rgba(255,90,122,0.10);
}

kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(0,0,0,0.25);
  color: rgba(255,255,255,0.92);
}

/* Accessibility focus */
button:focus-visible, input:focus-visible{
  outline: 2px solid rgba(43,212,255,0.65);
  outline-offset: 2px;
  border-radius: 14px;
}

@media (max-width: 980px){
  .layout{ grid-template-columns: 1fr; padding: 18px 16px 28px; }
  .canvasCard{ width: 100%; padding: 18px; }
  .top-inner{ padding: 14px 16px; }
}