:root {
  --bg: #eef1f5;
  --panel: #ffffff;
  --ink: #1f2933;
  --muted: #52606d;
  --faint: #8892a0;
  --line: #d9dde3;
  --accent: #2b6cb0;
  --fill: #2f9e44;
  --dig: #e8590c;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.45;
}

.app-head {
  padding: 18px 22px 6px;
}
.app-head h1 {
  margin: 0;
  font-size: 20px;
}
.app-head .sub {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 16px;
  padding: 16px 22px 40px;
  align-items: start;
}

.left {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.viz {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
}

#profile {
  display: block;
  width: 100%;
  height: 460px;
  border-radius: 6px;
  background: #fff;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 10px 4px 2px;
  font-size: 12px;
  color: var(--muted);
}
.key { display: inline-flex; align-items: center; gap: 6px; }
.sw { width: 16px; height: 10px; border-radius: 2px; display: inline-block; }
.sw-existing { background: var(--ink); }
.sw-ideal { background: repeating-linear-gradient(90deg, var(--accent) 0 6px, transparent 6px 10px); }
.sw-fill { background: rgba(47, 158, 68, 0.35); }
.sw-dig { background: rgba(232, 89, 12, 0.32); }
.sw-datum { background: repeating-linear-gradient(90deg, var(--faint) 0 5px, transparent 5px 8px); }

.note {
  margin: 6px 4px 0;
  font-size: 12px;
  color: var(--faint);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

.group { padding-bottom: 14px; margin-bottom: 14px; border-bottom: 1px solid var(--line); }
.group:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.group h2 {
  margin: 0 0 10px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.group-head { display: flex; justify-content: space-between; align-items: baseline; }
.hint { font-size: 11px; color: var(--faint); }

.row {
  display: grid;
  grid-template-columns: 112px 1fr auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}
.row label { color: var(--muted); font-size: 13px; }
.row input[type="number"],
.row select {
  width: 100%;
  padding: 5px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  background: #fff;
  color: var(--ink);
}
.row input[type="range"] { width: 100%; }
.row output { font-size: 12px; color: var(--muted); min-width: 44px; text-align: right; }

.point-rows { max-height: 300px; overflow-y: auto; padding-right: 4px; }
.point-row {
  display: grid;
  grid-template-columns: 18px 1fr 22px 68px 22px;
  gap: 4px;
  align-items: center;
  margin-bottom: 6px;
}
.point-row .pidx { color: var(--faint); font-size: 12px; text-align: right; }
.point-row input[type="range"] { width: 100%; min-width: 0; }

.point-row .step {
  width: 22px;
  height: 24px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  line-height: 1;
}

.depth-text {
  width: 100%;
  min-width: 0;
  padding: 4px 4px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  font-size: 12px;
  text-align: center;
}

.save-row { display: grid; grid-template-columns: 1fr auto; gap: 8px; }
.save-row input {
  width: 100%;
  padding: 5px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  background: #fff;
  color: var(--ink);
}
.saved-list { margin-top: 10px; display: flex; flex-direction: column; gap: 6px; }
.saved-row { display: flex; gap: 6px; align-items: center; }
.saved-name {
  flex: 1;
  min-width: 0;
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.saved-row .step { width: 26px; height: 26px; }
#saveStatus { display: block; margin-top: 8px; min-height: 14px; }
#shareLink {
  width: 100%;
  margin-top: 10px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 11px;
  color: var(--muted);
  background: #f8fafc;
}
#shareStatus { display: block; margin-top: 6px; min-height: 14px; color: var(--fill); }

.btn-row { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
button {
  font: inherit;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f8fafc;
  color: var(--ink);
  cursor: pointer;
}
button:hover { background: #eef2f7; }
button:active { transform: translateY(1px); }
.presets button { flex: 1; }

.results {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}
.results h2 {
  margin: 0 0 12px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}
.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fbfcfe;
}
.card .label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--faint); }
.card .value { font-size: 16px; font-weight: 600; margin-top: 3px; }
.card .sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.card.fill .value { color: var(--fill); }
.card.dig .value { color: var(--dig); }

.tables { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.table-wrap h3 { margin: 0 0 6px; font-size: 13px; color: var(--muted); }
.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: right; padding: 5px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
thead th { color: var(--faint); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; }
tbody tr:hover { background: #f6f8fb; }
td.fill { color: var(--fill); }
td.dig { color: var(--dig); }

@media (max-width: 900px) {
  main {
    grid-template-columns: 1fr;
  }
  .tables { grid-template-columns: 1fr; }
}