:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --text: #1f2328;
  --muted: #59636e;
  --border: #d0d7de;
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --danger: #cf222e;
  --danger-bg: #ffebe9;
  --ok: #1a7f37;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #161b22;
    --text: #e6edf3;
    --muted: #9198a1;
    --border: #30363d;
    --accent: #4c8dff;
    --accent-text: #0d1117;
    --danger: #ff7b72;
    --danger-bg: #3a1d1d;
    --ok: #3fb950;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  line-height: 1.6;
}

main, .topbar, .footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 8px;
}

h1 { margin: 0; font-size: 1.5rem; }
h2 { margin: 0 0 12px; font-size: 1.1rem; }

.month-picker { display: flex; gap: 6px; align-items: center; }

input, button {
  font: inherit;
  color: inherit;
}

input {
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.month-picker input { width: auto; }

input[aria-invalid="true"] { border-color: var(--danger); }

button {
  min-height: 44px;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
}

button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.ghost { background: transparent; }
button.danger { color: var(--danger); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

:is(button, input, summary, textarea):focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.alert {
  margin: 12px 0;
  padding: 12px 16px;
  border: 1px solid var(--danger);
  border-radius: 8px;
  background: var(--danger-bg);
  color: var(--text);
}
.alert p { margin: 0; font-weight: 600; }
.alert details { margin-top: 8px; }
.alert textarea { width: 100%; font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem; }

.notice {
  margin: 12px 0 0;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: var(--surface);
  font-size: 0.9rem;
}

.notice-warn { border-left-color: var(--danger); }

/* v1.1：控え（バックアップ）の欄・案内ページ */
h3 { margin: 20px 0 8px; font-size: 1rem; }
h4 { margin: 0 0 8px; font-size: 0.95rem; }
.hint { margin: 0 0 12px; font-size: 0.9rem; }
.review {
  margin-top: 12px;
  padding: 12px 16px;
  border: 1px solid var(--danger);
  border-radius: 8px;
}
.review p { margin: 0 0 8px; overflow-wrap: anywhere; }
.check { display: flex; gap: 8px; align-items: center; }
.check input { flex: none; width: 20px; height: 20px; min-height: 0; }
input[type="file"] { padding: 8px; }
a { color: var(--accent); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.doc ul, .doc ol { padding-left: 1.4em; }
.doc li { margin-bottom: 6px; }
.doc code { overflow-wrap: anywhere; }
.topbar p { margin: 0; }

.char-count { margin: 0; color: var(--muted); font-size: 0.85rem; }
.char-count.over { color: var(--danger); font-weight: 600; }

.status { min-height: 1.6em; margin: 8px 0; color: var(--ok); font-weight: 600; }

.dashboard { margin: 8px 0 20px; }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0;
}

.card {
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.card dt { color: var(--muted); font-size: 0.9rem; }
.card dd { margin: 4px 0 0; font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }

.panel {
  margin-bottom: 20px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}

#entry-form {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px 16px;
}
.field { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.field-wide { grid-column: 1 / -1; }
.field label { font-weight: 600; }
.field-error { margin: 0; min-height: 1.2em; color: var(--danger); font-size: 0.85rem; }
.actions { grid-column: 1 / -1; display: flex; gap: 8px; flex-wrap: wrap; }

.empty { margin: 0; color: var(--muted); }

.list { width: 100%; border-collapse: collapse; }
.list th, .list td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
.list th { color: var(--muted); font-size: 0.85rem; font-weight: 600; }
.list .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.list .name { overflow-wrap: anywhere; }
.list .ops { white-space: nowrap; text-align: right; }
.list .ops button { min-height: 36px; padding: 4px 12px; margin-left: 4px; }
.list tr.editing td { background: color-mix(in srgb, var(--accent) 10%, transparent); }

.footer { padding-bottom: 24px; color: var(--muted); font-size: 0.85rem; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* スマートフォン：集計とフォームを1列、一覧はカード形式 */
@media (max-width: 640px) {
  .cards { grid-template-columns: 1fr; }
  .card dd { font-size: 1.3rem; }
  #entry-form { grid-template-columns: 1fr; }
  .actions button { flex: 1; }

  .list thead { display: none; }
  .list, .list tbody, .list tr, .list td { display: block; width: 100%; }
  .list tr { padding: 10px 0; border-bottom: 1px solid var(--border); }
  .list td { display: flex; justify-content: space-between; gap: 12px; padding: 4px 0; border: 0; text-align: right; }
  .list td::before { content: attr(data-label); color: var(--muted); font-size: 0.85rem; text-align: left; }
  .list td.name { font-weight: 600; }
  .list .ops { justify-content: flex-end; padding-top: 8px; }
  .list .ops::before { content: none; }
}