:root {
  --blue: #1a73e8;
  --blue-bg: #e8f0fe;
  --green: #0d904f;
  --green-bg: #e6f4ea;
  --orange: #e37400;
  --orange-bg: #fef7e0;
  --border: #dadce0;
  --text: #202124;
  --muted: #5f6368;
  --card: #ffffff;
  --bg: #f8f9fa;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
  padding: 1.25rem;
}

.app { max-width: 1200px; margin: 0 auto; }

header { text-align: center; margin-bottom: 1.5rem; }
header h1 { font-size: 1.75rem; font-weight: 700; }
.subtitle { color: var(--muted); font-size: .95rem; }

.layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.4rem;
  border: 1px solid var(--border);
}
.card h2 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: baseline;
  gap: .5rem;
}
.hint { font-size: .8rem; font-weight: 400; color: var(--muted); }

.form-grid {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: .55rem .75rem;
  align-items: center;
}
.form-grid label { font-size: .88rem; color: var(--muted); text-align: right; }
.form-grid input, .form-grid select {
  width: 100%;
  padding: .45rem .65rem;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: .95rem;
  background: #fff;
}
.input-blue { background: var(--blue-bg) !important; border-color: #aecbfa !important; }
.readonly { background: #f1f3f4 !important; color: var(--muted); cursor: not-allowed; }

.validation { margin-top: 1rem; font-size: .88rem; }
.validation .msg {
  padding: .45rem .7rem;
  border-radius: 6px;
  margin-bottom: .35rem;
}
.msg.warn { background: var(--orange-bg); color: #b06000; border: 1px solid #f9cb9c; }
.msg.ok { background: var(--green-bg); color: var(--green); border: 1px solid #a8dab5; }

.summary-rows { display: flex; flex-direction: column; gap: .4rem; }
.sum-row {
  display: flex;
  justify-content: space-between;
  font-size: .92rem;
  padding: .25rem 0;
}
.sum-row.total-line {
  border-top: 1px solid var(--border);
  padding-top: .5rem;
  margin-top: .2rem;
  font-weight: 600;
}
.sum-row.grand {
  border-top: 2px solid var(--text);
  margin-top: .5rem;
  padding-top: .6rem;
  font-size: 1.05rem;
  font-weight: 700;
}
.calc-green { color: var(--green); font-variant-numeric: tabular-nums; }
.compat-status {
  margin-top: 1rem;
  padding: .55rem .75rem;
  border-radius: 6px;
  font-size: .88rem;
  text-align: center;
}
.compat-status.ok { background: var(--green-bg); color: var(--green); }
.compat-status.warn { background: var(--orange-bg); color: #b06000; }

.table-card { margin-bottom: 1.25rem; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { padding: .55rem .7rem; text-align: left; border-bottom: 1px solid var(--border); }
th {
  background: #f1f3f4;
  font-weight: 600;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .02em;
  color: var(--muted);
}
td.right { text-align: right; }
tfoot td { font-weight: 600; background: #f8f9fa; }
.status-ok { color: var(--green); font-weight: 500; }
.status-warn { color: var(--orange); font-weight: 500; }

.extra-grid { display: grid; gap: .75rem; }
.extra-row {
  display: grid;
  grid-template-columns: 1fr 90px 100px;
  gap: .6rem;
  align-items: center;
}
.extra-row select, .extra-row input {
  padding: .4rem .55rem;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: .9rem;
  background: var(--blue-bg);
}

footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: .8rem;
  color: var(--muted);
}