:root {
  --bg: #f6f7f9;
  --fg: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  --card: #ffffff;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}
header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; padding-top: max(12px, env(safe-area-inset-top));
  background: #1f2937; color: #fff;
}
header h1 { font-size: 18px; margin: 0; font-weight: 700; }
.sync { font-size: 12px; color: #cbd5e1; }
main { max-width: 720px; margin: 0 auto; padding: 16px; padding-bottom: 64px; }

.editor-bar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.savestate { font-size: 12px; color: var(--muted); }
.title-input { width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 16px; font-family: inherit; background: #fff; margin-bottom: 12px; }
button.danger { color: #b91c1c; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 12px;
  padding: 12px; font-size: 16px; font-family: inherit; resize: vertical; background: #fff;
}
.buttons { display: flex; gap: 8px; margin-top: 10px; }
button {
  font-size: 15px; font-family: inherit; border-radius: 10px; padding: 11px 16px;
  border: 1px solid var(--line); background: #fff; cursor: pointer;
}
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 700; flex: 1; }
button.primary:disabled { opacity: 0.6; }
button.ghost { background: #fff; color: var(--fg); }
.status { font-size: 14px; color: var(--muted); min-height: 1.4em; margin: 8px 2px 0; }

.result-actions { display: flex; gap: 8px; justify-content: flex-end; margin: 16px 0 4px; }
.result { margin-top: 8px; }
.muted { color: var(--muted); }

.block { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; margin: 12px 0; }
.block h2 { font-size: 15px; margin: 0 0 8px; color: var(--accent); }
.block p { margin: 4px 0; }
ul.todo { list-style: none; padding: 0; margin: 0; }
ul.todo li { padding: 8px 0; border-bottom: 1px dashed var(--line); display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
ul.todo li:last-child { border-bottom: 0; }
ul.todo label { display: inline-flex; align-items: center; gap: 8px; margin: 0; color: var(--fg); font-size: 15px; }
ul.todo input[type="checkbox"] { width: 18px; height: 18px; }
ul.todo input:checked + span { text-decoration: line-through; color: var(--muted); }
.tag { font-size: 12px; background: #eef2ff; color: #3730a3; border-radius: 999px; padding: 2px 9px; }
.card { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin: 8px 0; background: #fafafa; }
.card h3 { font-size: 14px; margin: 0 0 6px; }
pre.draft { white-space: pre-wrap; font-family: inherit; font-size: 14px; margin: 0; background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 10px; }

.history-area { margin-top: 28px; }
.history-area h2 { font-size: 14px; color: var(--muted); }
ul.history { list-style: none; padding: 0; margin: 0; }
ul.history li { display: flex; align-items: center; gap: 6px; border-bottom: 1px solid var(--line); }
ul.history li.muted { padding: 10px 2px; }
ul.history button.open { flex: 1; text-align: left; border: 0; background: none; padding: 12px 2px; font-size: 15px; color: var(--fg); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
ul.history button.del { border: 0; background: none; color: var(--muted); font-size: 20px; padding: 6px 10px; }

.privacy { font-size: 12px; color: var(--muted); margin-top: 28px; border-top: 1px solid var(--line); padding-top: 12px; }