:root { --c1:#2f6fab; --c2:#f5f7fb; --c3:#222; --c4:#d7dbe4; }
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: system-ui, Arial, sans-serif;
  background: var(--c2);
  color: var(--c3);
  margin: 0;
  padding: 24px;
}
h1 {
  margin: 0 0 12px;
  color: var(--c1);
  display: flex;
  align-items: center;
  gap: .5ch;
  flex-wrap: wrap;
}
.card {
  background: #fff;
  border: 1px solid var(--c4);
  border-radius: 12px;
  padding: 16px;
  /* fill page width by default */
  width: 100%;
  max-width: none;
  margin: 0 auto;
}
.row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin: 10px 0;
}
label { font-size: .95rem; }
input[type="range"] { width: 220px; }
button {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--c4);
  background: #fff;
  cursor: pointer;
}
button:disabled { opacity: .6; cursor: not-allowed; }

/* Responsive roll: width 100%, fixed CSS-height; JS will scale pixels for DPR */
#roll {
  display:block;
  width: 100%;
  height: 220px; /* a touch taller for visibility */
  border: 1px solid var(--c4);
  border-radius: 10px;
  background: #fff;
  margin: 10px 0 14px;
}

#osmd {
  background: #fff;
  border: 1px solid var(--c4);
  border-radius: 10px;
  padding: 10px;
  margin: 12px 0;
  max-height: 420px;
  overflow: auto;
  width: 100%;
}

/* More breathing room below the keyboard */
all-around-keyboard {
  width: 100%;
  height: 170px;
  display: block;
  border: 1px solid var(--c4);
  border-radius: 10px;
  margin: 12px 0 36px;
}

#status {
  font: 12px/1.4 ui-monospace, monospace;
  background: #fff;
  border: 1px solid #e0e4ee;
  border-radius: 8px;
  padding: 8px;
  white-space: pre-wrap;
  max-height: 300px;
  overflow: auto;
  margin-top: 24px;
}

.small { font-size: .9rem; color: #555; }

/* drag & drop affordance */
#dropZone.dragover {
  outline: 2px dashed var(--c1);
  outline-offset: 6px;
}