/* Plain, mobile-first base styles. Visual polish is a later pass. */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Malgun Gothic", sans-serif;
  line-height: 1.6;
  color: #1f2933;
  background: #f5f6f8;
  overflow-wrap: anywhere;
  word-break: keep-all;
}
.container { width: 100%; max-width: 720px; margin: 0 auto; padding: 1rem; }
.narrow { max-width: 360px; margin: 2rem auto; }
.card { background: #fff; padding: 1.5rem; border-radius: 8px; border: 1px solid #d9dde3; }
h1 { font-size: 1.5rem; margin: 1rem 0; }
h2 { font-size: 1.15rem; margin: 1.5rem 0 .5rem; }
a { color: #1d4f91; }
label { display: block; }
label.inline { display: flex; gap: .5rem; align-items: flex-start; }
input, select, button { font: inherit; max-width: 100%; }
input:not([type=checkbox]), select {
  width: 100%; padding: .6rem; margin-top: .25rem;
  border: 1px solid #aeb5bf; border-radius: 6px; background: #fff;
}
button {
  padding: .65rem 1rem; border: 0; border-radius: 6px;
  background: #1d4f91; color: #fff; cursor: pointer;
}
button.secondary { background: #e4e7eb; color: #1f2933; }
.stack > * + * { margin-top: 1rem; }
.stack button { width: 100%; }
.list { list-style: none; margin: 0; padding: 0; }
.list li { padding: .6rem 0; border-bottom: 1px solid #e4e7eb; }
.error { color: #b00020; }
.danger { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid #e4e7eb; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.topbar p { margin: 0; }
.scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
th, td { border: 1px solid #d9dde3; padding: .4rem .6rem; text-align: left; }
table.num th:not(:first-child), table.num td:not(:first-child) { text-align: right; }
.footer { color: #5f6b7a; font-size: .85rem; border-top: 1px solid #d9dde3; margin-top: 2rem; }
.warn { padding: .6rem .8rem; border: 1px solid #c77700; border-radius: 6px; background: #fff6e5; }
.settings-group { margin: .75rem 0; border-top: 1px solid #e4e7eb; padding-top: .5rem; }
.settings-group summary { cursor: pointer; font-weight: 600; }
.settings-group label { margin-top: .75rem; }
.hint { display: block; color: #5f6b7a; font-size: .85rem; }
.rule-key { display: block; font-size: .85rem; color: #3e4c59; }
textarea { width: 100%; font: inherit; padding: .5rem; border: 1px solid #aeb5bf; border-radius: 6px; }
.quote { margin: .5rem 0; padding: .6rem .8rem; border-left: 4px solid #1d4f91; background: #f3f6fa; border-radius: 0 6px 6px 0; }
.quote p { margin: 0; white-space: pre-wrap; }
.quote footer { margin-top: .35rem; color: #5f6b7a; font-size: .85rem; }
.rule-field { margin-top: 1rem; padding-top: .5rem; border-top: 1px dashed #e4e7eb; }
.rule-title { font-weight: 600; }
.rule-sub { font-size: 1rem; margin: 1.25rem 0 .25rem; color: #1d4f91; }
.rule-input { display: flex; align-items: center; gap: .5rem; }
.rule-input input { flex: 1 1 auto; min-width: 0; }
.unit-hint { flex: 0 0 auto; white-space: nowrap; color: #1f2933; font-weight: 600; margin-top: .25rem; }
.changed-mark { display: inline-block; margin-top: .25rem; padding: 0 .4rem; border-radius: 4px; background: #fff6e5; color: #8a5300; font-size: .85rem; }
.rule-original summary, .rule-more summary { cursor: pointer; color: #5f6b7a; font-size: .85rem; }
.rule-original p { margin: .25rem 0; padding: .4rem .6rem; background: #f3f6fa; border-radius: 6px; white-space: pre-wrap; font-size: .9rem; }
.rule-more .rule-key { color: #8a94a3; font-size: .8rem; }
.ph { white-space: nowrap; }