:root {
  --bg: #f7f6f2; --surface: #ffffff; --text: #1d1d1b; --muted: #6b6a64;
  --line: #e2e0d8; --accent: #1f6f5c; --accent-text: #ffffff;
  --flag: #9a3b1b; --flag-bg: #fbeee8; --radius: 12px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161614; --surface: #20201d; --text: #ecebe6; --muted: #a09f97;
    --line: #34332e; --accent: #4fb39a; --accent-text: #0e1a17;
    --flag: #f0a080; --flag-bg: #3a2219;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, "Noto Sans TC", sans-serif;
}
header, main, footer { max-width: 560px; margin: 0 auto; padding: 0 16px; }
header h1 { font-size: 1.1rem; margin: 16px 0 8px; color: var(--accent); }
h2 { font-size: 1rem; margin: 20px 0 8px; }
section {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px; margin: 12px 0;
}
.last .big { font-size: 1.5rem; font-weight: 600; margin: 4px 0; }
.label { margin: 0; color: var(--muted); font-size: .9rem; }
.muted { color: var(--muted); font-size: .9rem; }
.error, .flag { color: var(--flag); }
.flag { background: var(--flag-bg); border-radius: 8px; padding: 4px 8px; margin: 6px 0 0; font-size: .9rem; }
.flash { background: var(--surface); border-left: 4px solid var(--accent); padding: 8px 12px; border-radius: 8px; }
label { display: block; font-size: .9rem; color: var(--muted); margin: 8px 0; flex: 1; }
input[type=text], input[type=number], input[type=time] {
  display: block; width: 100%; margin-top: 4px; padding: 12px;
  font-size: 1.1rem; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px;
}
.row { display: flex; gap: 12px; }
button { font: inherit; cursor: pointer; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text); padding: 10px 14px; }
button.primary {
  width: 100%; margin-top: 12px; padding: 16px; font-size: 1.25rem; font-weight: 600;
  background: var(--accent); color: var(--accent-text); border: none;
}
button:disabled { opacity: .5; }
.seg { margin: 8px 0; }
.seg button { flex: 1; }
.seg button.on { border-color: var(--accent); color: var(--accent); font-weight: 600; }
button.ghost { padding: 4px 10px; font-size: .85rem; color: var(--muted); }
.list { list-style: none; padding: 0; margin: 0; }
.list li { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 8px 0; border-top: 1px solid var(--line); }
.card { border-top: 1px solid var(--line); padding: 12px 0; }
.card-head { display: flex; justify-content: space-between; gap: 8px; margin: 0; font-weight: 600; }
.tag { font-size: .8rem; font-weight: 400; color: var(--muted); white-space: nowrap; }
.card dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px 12px; margin: 8px 0 0; }
.card dt { color: var(--muted); font-size: .8rem; }
.card dd { margin: 0; font-variant-numeric: tabular-nums; font-size: 1.05rem; }
footer { color: var(--muted); font-size: .85rem; padding-bottom: 32px; }
/* Flex children must be allowed to shrink below their content width, or
   time inputs and long meal names push the page wider than the phone. */
label, input, .list li span { min-width: 0; }
.list li span { overflow-wrap: anywhere; }
.list li button { flex: none; }
section > h2:first-child { margin-top: 0; }
header { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.account { margin: 0; font-size: .85rem; color: var(--muted); overflow-wrap: anywhere; text-align: right; }
.account a { color: var(--accent); }
.privacy { max-width: 560px; margin: 0 auto; padding: 0 16px; }