:root {
  --bg: #f3efe6;
  --ink: #1c2a32;
  --brand: #1a4d6d;
  --accent: #c45c26;
  --card: #fffdf8;
  --line: #d5cdc0;
  --muted: #6b7280;
  --err: #b42318;
  --ok: #1f6b4a;
  --radius: 10px;
  --font: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #dce8ef 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #f0d9c8 0%, transparent 50%),
    var(--bg);
  min-height: 100%;
}
body { max-width: 480px; margin: 0 auto; padding: 0 12px 24px; overflow-x: hidden; }
.brand { padding: 48px 8px 16px; text-align: center; }
.brand h1 { margin: 0; font-size: 2rem; letter-spacing: 0.04em; color: var(--brand); }
.brand p { margin: 8px 0 0; color: var(--muted); }
#login-form, .composer {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px;
}
input[type=password], textarea {
  width: 100%; font-size: 16px; padding: 12px; border: 1px solid var(--line);
  border-radius: 8px; background: #fff; font-family: inherit;
}
button {
  appearance: none; border: 0; border-radius: 8px; padding: 12px 14px;
  background: var(--brand); color: #fff; font-size: 15px; font-weight: 600;
}
button.ghost { background: transparent; color: var(--brand); border: 1px solid var(--line); padding: 6px 10px; font-size: 13px; }
.check { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.error { color: var(--err); font-size: 14px; }
.hint { color: var(--muted); font-size: 13px; text-align: center; }
.top { display: flex; justify-content: space-between; align-items: center; padding: 14px 0 8px; }
.top-actions { display: flex; align-items: center; gap: 8px; }
.muted { color: var(--muted); font-size: 12px; }
.tabs { display: flex; gap: 4px; overflow-x: auto; padding-bottom: 8px; }
.tabs button { background: transparent; color: var(--ink); border: 1px solid var(--line); flex: 1; padding: 8px; font-size: 13px; }
.tabs button.active { background: var(--brand); color: #fff; border-color: var(--brand); }
.quick { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.quick button { background: #fff; color: var(--brand); border: 1px solid var(--line); padding: 8px 10px; font-size: 13px; font-weight: 500; }
.messages { display: flex; flex-direction: column; gap: 12px; min-height: 40vh; padding-bottom: 12px; }
.bubble { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; }
.bubble.user { background: #e7f0f6; }
.bubble h3 { margin: 0 0 6px; font-size: 15px; }
.bubble ul { margin: 0; padding-left: 1.1em; }
.meta { margin-top: 8px; font-size: 12px; color: var(--muted); }
.fb { display: flex; gap: 8px; margin-top: 8px; align-items: center; }
.fb input { flex: 1; font-size: 14px; padding: 6px; }
details summary { cursor: pointer; color: var(--brand); font-size: 13px; }
.listblock { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; margin-bottom: 10px; }
.listblock h3 { margin: 0 0 8px; font-size: 14px; color: var(--brand); }
.warn { color: var(--accent); font-weight: 600; }
.approval-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
@media (max-width: 400px) {
  body { padding: 0 8px 20px; }
  .quick button { font-size: 12px; }
}