:root {
  --paper: #F6F1EA;
  --ink: #2B2328;
  --berry: #7B304B;
  --wine: #4E1F33;
  --gold: #B08D57;
  --white: #fff;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "游ゴシック体", "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  line-height: 1.9;
  font-size: 16px;
}
h1, h2 {
  font-family: "游明朝", "Yu Mincho", "Hiragino Mincho ProN", serif;
  letter-spacing: .04em;
  margin: 0 0 .6em;
}
.site-header {
  padding: 18px clamp(20px, 5vw, 60px);
  background: var(--wine);
  color: var(--white);
}
.brand {
  font-family: "游明朝", "Yu Mincho", serif;
  font-size: 1.2rem;
  letter-spacing: .1em;
}
.app {
  max-width: 640px;
  margin: 0 auto;
  padding: clamp(24px, 6vw, 56px) clamp(18px, 5vw, 24px) 100px;
}
.eyebrow {
  color: var(--berry);
  font-size: .75rem;
  letter-spacing: .2em;
  margin-bottom: 8px;
}
.step-title { font-size: 1.4rem; margin-bottom: 20px; }
.card {
  background: var(--white);
  border: 1px solid rgba(123, 48, 75, .15);
  padding: 24px;
  margin-bottom: 20px;
}
.card h2 { font-size: 1.05rem; margin-bottom: 14px; }
.option-grid { display: grid; gap: 10px; }
.option {
  display: block;
  border: 1px solid rgba(123, 48, 75, .3);
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}
.option:hover { border-color: var(--berry); }
.option.selected { border-color: var(--berry); background: rgba(123, 48, 75, .06); }
.option input { display: none; }
.option-name { font-weight: 600; }
.option-duration { font-size: .8125rem; color: var(--berry); margin-top: 2px; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.field { display: grid; gap: 6px; margin-bottom: 16px; }
.field label { font-size: .8125rem; letter-spacing: .06em; color: var(--berry); }
.field input, .field textarea {
  font: inherit;
  font-size: 1rem;
  padding: 10px 2px;
  border: none;
  border-bottom: 1px solid rgba(123, 48, 75, .4);
  background: transparent;
  width: 100%;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--berry); }
.slot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 8px;
  margin-top: 12px;
}
.slot {
  padding: 10px 6px;
  text-align: center;
  border: 1px solid rgba(123, 48, 75, .3);
  cursor: pointer;
  font-size: .9rem;
}
.slot:hover, .slot.selected { border-color: var(--berry); background: rgba(123, 48, 75, .08); }
.button {
  display: inline-block;
  padding: 14px 28px;
  background: var(--berry);
  color: var(--white);
  border: 1px solid var(--berry);
  font-weight: 700;
  cursor: pointer;
  font-size: 1rem;
}
.button:hover { opacity: .92; }
.button[disabled] { opacity: .4; cursor: default; }
.button--line { background: transparent; color: var(--berry); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.notice { font-size: .8125rem; color: var(--berry); opacity: .85; margin-top: 10px; }
.summary dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; margin: 0 0 16px; }
.summary dt { color: var(--berry); font-size: .8125rem; }
.summary dd { margin: 0; }
.error { color: #a12; font-size: .875rem; margin-top: 8px; }
.link { color: var(--berry); text-decoration: underline; text-underline-offset: 2px; }