:root {
  --bg: #141210;
  --card: #1c1916;
  --line: #3a342c;
  --text: #f3eee6;
  --mute: #9c9386;
  --burn: #c65b32;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 "Segoe UI", Tahoma, sans-serif;
}

main {
  max-width: 36rem;
  margin: 0 auto;
  padding: 4.5rem 1.25rem 5rem;
}

h1 {
  font-size: 1.7rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  margin: 0 0 0.6rem;
}

.lead { color: var(--mute); margin: 0 0 1.8rem; }

.zone {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 11rem;
  border: 1px dashed var(--line);
  border-radius: 14px;
  background: var(--card);
  cursor: pointer;
  padding: 1.5rem;
  text-align: center;
}
.zone:hover, .zone.over { border-color: var(--burn); }
.zone input { display: none; }

.meta { color: var(--mute); font-size: 0.86rem; margin: 0.8rem 0 0; }
.err { color: #e07a62; }

#bar {
  height: 4px;
  background: #2a2622;
  border-radius: 99px;
  margin-top: 1rem;
  overflow: hidden;
}
#fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--burn);
}

#done { margin-top: 1.6rem; }
#done label { display: block; font-size: 0.8rem; color: var(--mute); margin-bottom: 0.4rem; }
.row { display: flex; gap: 0.5rem; }
.row input {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font: inherit;
}
button {
  background: var(--burn);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 0.65rem 1rem;
  font: inherit;
  cursor: pointer;
}