:root {
  --ink: #16241f;
  --paper: #f6f4ef;
  --panel: #ffffff;
  --line: #d8d2c4;
  --accent: #2f6b4f;
  --accent-dark: #234f3a;
  --warn: #a9451f;
  --muted: #6b6255;
  --ok-bg: #dcf0e3;
  --bad-bg: #f6ddd4;
  --pending-bg: #f1ecd8;
  --mono: "SF Mono", "Menlo", "Consolas", monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

header.app-header {
  background: var(--accent-dark);
  color: #f6f4ef;
  padding: 1rem 1.1rem calc(1rem + env(safe-area-inset-bottom, 0));
  padding-top: calc(1rem + env(safe-area-inset-top, 0));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.brand { display: flex; align-items: center; gap: 0.65rem; }
.brand .crest { font-size: 1.7rem; line-height: 1; }
header.app-header h1 { font-size: 1.1rem; margin: 0; }
header.app-header .sub { margin: 0.1rem 0 0; font-size: 0.75rem; opacity: 0.8; }
header.app-header .tag {
  font-size: 0.65rem;
  background: rgba(255, 255, 255, 0.16);
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

main {
  max-width: 520px;
  margin: 0 auto;
  padding: 1rem 0.9rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

details.settings {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
}
details summary { cursor: pointer; font-weight: 600; font-size: 0.9rem; }
.settings-grid { display: grid; gap: 0.5rem; margin-top: 0.7rem; }

section.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1rem 1.1rem;
}
.step-head { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.5rem; }
.step-no {
  flex: 0 0 auto;
  width: 1.6rem; height: 1.6rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
section.card h2 { font-size: 1rem; margin: 0; color: var(--accent-dark); }

section.step.is-locked { opacity: 0.45; pointer-events: none; filter: grayscale(0.3); }

label {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0.5rem 0 0.25rem;
}
.hint { font-size: 0.78rem; color: var(--muted); margin: 0.35rem 0 0; }

input[type="text"], input[type="number"], select {
  width: 100%;
  padding: 0.7rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 1rem;
  background: #fff;
  color: var(--ink);
}

button {
  width: 100%;
  margin-top: 0.85rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}
button:disabled { background: #b9c6bf; cursor: not-allowed; }
button:active:not(:disabled) { background: var(--accent-dark); }

#settings-save { margin-top: 0.3rem; }

.area-field { margin-top: 0.8rem; }
.stepper { display: flex; align-items: stretch; gap: 0.5rem; }
.stepper input { text-align: center; font-weight: 700; }
.stepper button {
  width: 3rem;
  margin: 0;
  font-size: 1.3rem;
  background: #fff;
  color: var(--accent-dark);
  border: 1px solid var(--accent);
  border-radius: 8px;
}

.result { margin-top: 0.9rem; display: flex; flex-direction: column; gap: 0.15rem; }
.kv {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}
.kv span { color: var(--muted); }
.kv b { text-align: right; }
.kv.rate b { color: var(--muted); font-weight: 600; }
.kv.total { border-bottom: none; margin-top: 0.15rem; }
.kv.total span { font-weight: 700; color: var(--ink); }
.kv.total b { font-size: 1.35rem; color: var(--accent-dark); }
.kv .mono { font-family: var(--mono); font-size: 0.8rem; word-break: break-all; }

.verdict {
  font-weight: 800;
  font-size: 1.05rem;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
}
.verdict.ok { background: var(--ok-bg); color: var(--accent-dark); }
.verdict.bad { background: var(--bad-bg); color: var(--warn); }
.verdict.pending { background: var(--pending-bg); color: #7a6521; }

.reasons { list-style: none; padding: 0; margin: 0.4rem 0 0; display: flex; flex-wrap: wrap; gap: 0.35rem; }
.reasons li {
  background: var(--bad-bg);
  color: var(--warn);
  border-radius: 4px;
  padding: 0.25rem 0.55rem;
  font-size: 0.8rem;
  text-transform: capitalize;
}

.copyable { cursor: pointer; }
.copyable:active { opacity: 0.6; }

.error-box {
  background: var(--bad-bg);
  border: 1px solid var(--warn);
  color: var(--warn);
  border-radius: 8px;
  padding: 0.6rem 0.7rem;
  font-size: 0.85rem;
  margin-top: 0.8rem;
  word-break: break-word;
}

footer.narrative {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  padding: 1rem 1.2rem 2rem;
}
footer.narrative code { font-size: 0.68rem; }