:root {
  --paper: #f3e9d6;
  --ink: #2a1c10;
  --muted: #6d5740;
  --amber: #a85a0c;
  --amber-deep: #7d3f05;
  --line: #2a1c10;
  --panel: #fbf5e9;
  --night: #24170c;
  --night-ink: #f7e8cf;
  --night-accent: #f2ac4e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1c120a;
    --ink: #f3e6d0;
    --muted: #c3ab8c;
    --amber: #f2ac4e;
    --amber-deep: #f7c67e;
    --line: #7b6146;
    --panel: #281a0e;
    --night: #362312;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif JP", serif;
  line-height: 1.85;
}
main { max-width: 640px; margin: 0 auto; padding: 48px 16px 64px; }
header { border-bottom: 3px double var(--line); padding-bottom: 28px; }
.mark { margin: 0 0 8px; color: var(--amber); font-weight: 700; letter-spacing: .3em; font-size: .85rem; }
h1 { margin: 0 0 18px; font-size: clamp(2.6rem, 12vw, 4.4rem); line-height: 1.12; letter-spacing: .03em; }
.lead { margin: 0; font-size: 1.1rem; }
h2 { margin: 0 0 10px; font-size: 1.2rem; line-height: 1.5; }
section, form { margin-top: 32px; }
ul { margin: 0; padding-left: 1.2em; }
li + li { margin-top: 6px; }
a { color: var(--amber-deep); text-underline-offset: 3px; }
.notice { border-left: 5px solid var(--amber); padding-left: 16px; }
form { background: var(--panel); border: 1px solid var(--line); padding: 22px 18px; }
.hint { color: var(--muted); font-size: .92rem; margin: 6px 0 14px; }
.hint strong { color: var(--ink); }
fieldset { border: 0; padding: 0; margin: 14px 0 18px; }
legend { padding: 0; font-weight: 700; margin-bottom: 4px; }
fieldset label { display: block; padding: 5px 0; }
input[type="radio"] { accent-color: var(--amber); width: 18px; height: 18px; vertical-align: -3px; margin-right: 6px; }
.field { display: block; font-weight: 700; margin-bottom: 6px; }
textarea {
  display: block; width: 100%; padding: 12px; font: inherit; font-size: 16px;
  color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 0; resize: vertical;
}
textarea:focus, button:focus-visible, a:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; }
.trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
button {
  min-height: 48px; padding: 8px 40px; font: inherit; font-weight: 700; letter-spacing: .2em; cursor: pointer;
  color: #fff8ec; background: #8f4a08; border: 0; border-radius: 0;
}
button:hover { background: #743b05; }
button:disabled { opacity: .6; cursor: wait; }
#status { min-height: 1.8em; margin: 12px 0 0; font-weight: 700; }
.urgent { background: var(--night); color: var(--night-ink); padding: 22px 18px; }
.urgent a { color: var(--night-accent); font-weight: 700; white-space: nowrap; }
.urgent p { margin: 0 0 10px; }
.urgent .source { margin: 12px 0 0; font-size: .85rem; }
.urgent .source a { font-weight: 400; white-space: normal; }
.sources { font-size: .95rem; }
footer { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
footer p { margin: 0 0 8px; }