:root {
  --c-bg: #12100f;
  --c-surface: #1c1917;
  --c-text: #f5f1ea;
  --c-muted: #a8a29e;
  --c-accent: #c9a227;
  --c-accent-text: #1a1714;
  --line: rgba(255, 255, 255, 0.1);
  --radius: 12px;
  --pad: 16px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0 0 48px;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ---------- header ---------- */
.hd {
  padding: 18px var(--pad) 14px;
  text-align: center;
  border-bottom: 1px solid var(--line);
  background: var(--c-surface);
}
.hd-name {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-accent);
}
.hd-sub {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--c-muted);
}

/* ---------- step indicator ---------- */
.steps {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--c-bg);
  border-bottom: 1px solid var(--line);
  padding: 12px var(--pad) 10px;
}
.steps ol {
  display: flex;
  max-width: 400px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}
.steps li {
  position: relative;
  flex: 1;
  text-align: center;
  color: var(--c-muted);
  font-size: 11px;
}
.steps li + li::before {
  content: "";
  position: absolute;
  top: 13px;
  right: 50%;
  width: 100%;
  height: 2px;
  background: var(--line);
}
.steps li.is-done + li::before,
.steps li.is-current::before { background: var(--c-accent); }
.steps-num {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin: 0 auto 4px;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--c-bg);
  font-size: 13px;
  font-weight: 700;
}
.steps-label { display: block; }
.steps li.is-current { color: var(--c-text); font-weight: 700; }
.steps li.is-current .steps-num { border-color: var(--c-accent); color: var(--c-accent); }
.steps li.is-done .steps-num {
  border-color: var(--c-accent);
  background: var(--c-accent);
  color: var(--c-accent-text);
}

/* ---------- step sections ---------- */
.step { padding-top: 20px; }
.step[hidden] { display: none; }

/* ---------- banner / intro ---------- */
.banner {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 14px;
  border: 1px solid var(--c-accent);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--c-accent) 12%, transparent);
}
.banner p { margin: 0; font-size: 14px; font-weight: 600; }
.banner-icon { font-size: 20px; line-height: 1.4; }

.intro {
  margin: 14px 0 22px;
  font-size: 12px;
  color: var(--c-muted);
}

/* ---------- questions ---------- */
.q {
  margin: 0 0 24px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--c-surface);
}
.q-legend { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 0; }
.q-no { font-size: 12px; font-weight: 700; color: var(--c-accent); }
.q-label { font-size: 15px; font-weight: 700; }
.badge {
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  line-height: 1.6;
}
.badge-req { background: #b91c1c; color: #fff; }
.badge-mock { background: var(--c-muted); color: var(--c-bg); }
.q-note { margin: 4px 0 12px; font-size: 11px; color: var(--c-muted); }

.opts { display: flex; flex-wrap: wrap; gap: 8px; }
.opt { display: block; }
.opt input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}
.opt-box {
  display: block;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  cursor: pointer;
  user-select: none;
  transition: background 0.12s, border-color 0.12s;
}
.opt input:checked + .opt-box {
  border-color: var(--c-accent);
  background: var(--c-accent);
  color: var(--c-accent-text);
  font-weight: 700;
}
.opt input:focus-visible + .opt-box { outline: 2px solid var(--c-accent); outline-offset: 2px; }
.opt input:disabled + .opt-box { opacity: 0.38; cursor: not-allowed; }

.q-error, .form-error, .gen-error {
  margin: 10px 0 0;
  color: #fca5a5;
  font-size: 12px;
}
.q.has-error { border-color: #b91c1c; }

/* ---------- buttons ---------- */
.btn {
  display: block;
  width: 100%;
  padding: 15px 16px;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.btn + .btn { margin-top: 10px; }
.btn-primary { background: var(--c-accent); color: var(--c-accent-text); }
.btn-primary:active { filter: brightness(0.92); }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--c-text);
}
.btn-link {
  background: transparent;
  color: var(--c-muted);
  font-size: 13px;
  font-weight: 400;
  text-decoration: underline;
  padding: 12px;
}
.btn[disabled] { opacity: 0.5; cursor: default; }

.note { font-size: 11px; color: var(--c-muted); }
.note-center { text-align: center; margin-top: 10px; }

/* ---------- step2 ---------- */
.loading { text-align: center; padding: 48px 0; color: var(--c-muted); font-size: 14px; }
.spinner {
  display: block;
  width: 28px;
  height: 28px;
  margin: 0 auto 14px;
  border: 3px solid var(--line);
  border-top-color: var(--c-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 2.4s; } }

.card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--c-surface);
}
.card-quiet { background: transparent; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.card-head h2 { margin: 0 0 10px; font-size: 14px; }

textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: inherit;
  font-size: 15px;
  line-height: 1.9;
  resize: vertical;
}
textarea:focus { outline: 2px solid var(--c-accent); outline-offset: 1px; }
.char-count { margin: 6px 0 0; text-align: right; font-size: 11px; color: var(--c-muted); }
.disclaimer {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  color: var(--c-muted);
}
.actions { margin-top: 18px; }

.copied {
  margin: 0 0 14px;
  padding: 10px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--c-accent) 15%, transparent);
  color: var(--c-accent);
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}
.own-msg { margin: 0 0 14px; font-size: 13px; color: var(--c-muted); text-align: center; }

/* ---------- guide ---------- */
.guide { margin-top: 20px; }
.guide-title { margin: 0 0 10px; font-size: 12px; color: var(--c-muted); }
.guide-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: guide;
}
.guide-item {
  position: relative;
  padding: 12px 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--c-surface);
  text-align: center;
}
.guide-fig svg { display: block; width: 100%; height: 34px; }
.guide-fig .stroke { fill: none; stroke: var(--c-muted); stroke-width: 2; }
.guide-fig .stroke-dark { fill: none; stroke: var(--c-accent-text); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.guide-fig .fill-muted { fill: var(--c-muted); }
.guide-fig .fill-accent { fill: var(--c-accent); }
.guide-fig .star-on { fill: var(--c-accent); }
.guide-fig .star-off { fill: none; stroke: var(--c-muted); stroke-width: 1; }
.guide-n {
  position: absolute;
  top: 6px;
  left: 8px;
  font-size: 11px;
  font-weight: 700;
  color: var(--c-accent);
}
.guide-text { display: block; margin-top: 6px; font-size: 11px; line-height: 1.5; }

.notes { margin: 16px 0 0; padding-left: 1.1em; font-size: 12px; color: var(--c-muted); }
.notes li + li { margin-top: 4px; }

/* ---------- step3 完了画面 ---------- */
.done {
  padding: 32px 18px 26px;
  border: 2px solid var(--c-accent);
  border-radius: var(--radius);
  background: var(--c-surface);
  text-align: center;
}
.done-check {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--c-accent);
  color: var(--c-accent-text);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
}
.done-title { margin: 0 0 12px; font-size: 20px; color: var(--c-accent); }
.done-message {
  margin: 0 0 26px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.8;
}
.done-stamp {
  padding: 16px 12px;
  border: 1px dashed var(--c-accent);
  border-radius: 8px;
}
.done-stamp-label { margin: 0 0 4px; font-size: 11px; color: var(--c-muted); }
.done-date { margin: 0; font-size: 17px; font-weight: 700; letter-spacing: 0.04em; }
.done-time {
  margin: 2px 0 0;
  font-size: 40px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}
.done-store { margin: 20px 0 0; font-size: 12px; color: var(--c-muted); }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 50;
  max-width: 90%;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--c-accent);
  color: var(--c-accent-text);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}
.toast[hidden] { display: none; }

/* ---------- misc ---------- */
.store-list { list-style: none; padding: 20px 0; }
.store-list li { padding: 10px 0; border-bottom: 1px solid var(--line); }
.store-list a { color: var(--c-accent); }
.muted { color: var(--c-muted); font-size: 12px; }

@media (min-width: 600px) {
  .guide-list { grid-template-columns: repeat(4, 1fr); }
}