/* Material 3（Expressive）寄りの共通スタイル。塾の色は --brand（app.js が設定）を元に使う */
:root {
  color-scheme: light;
  --brand: #185bbb;
  --md-primary: var(--brand);
  --md-on-primary: #ffffff;
  --md-primary-container: color-mix(in srgb, var(--brand) 14%, #ffffff);
  --md-on-primary-container: color-mix(in srgb, var(--brand) 80%, #000000);
  --md-secondary-container: color-mix(in srgb, var(--brand) 10%, #eef0f5);
  --md-on-secondary-container: #2b3240;
  --md-surface: #fbf9fc;
  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #f4f3f7;
  --md-surface-container: #efedf1;
  --md-surface-container-high: #e9e7ec;
  --md-on-surface: #1b1b1f;
  --md-on-surface-variant: #45464f;
  --md-outline: #767680;
  --md-outline-variant: #c6c5d0;
  --md-error: #ba1a1a;
  --md-error-container: #ffdad6;
  --md-on-error-container: #93000a;
  --md-success: #006d40;
  --shape-sm: 8px; --shape-md: 12px; --shape-lg: 16px; --shape-xl: 28px; --shape-full: 9999px;
  --elev-1: 0 1px 2px rgba(0,0,0,.3), 0 1px 3px 1px rgba(0,0,0,.15);
  --elev-2: 0 1px 2px rgba(0,0,0,.3), 0 2px 6px 2px rgba(0,0,0,.15);
  --font: "Noto Sans JP", Roboto, -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif;
  --motion: cubic-bezier(.2, 0, 0, 1);
}
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--md-on-surface); background: var(--md-surface); line-height: 1.6; font-size: 16px; }
.wrap { max-width: 680px; margin: 0 auto; padding: 0 16px; }

/* ---- Top app bar + progress ---- */
.appbar { position: sticky; top: 0; z-index: 5; background: var(--md-surface-container-lowest); box-shadow: var(--elev-1); }
.bar { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 12px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--brand); font-weight: 700; font-size: 18px; letter-spacing: .01em; }
.brand .mark { width: 36px; height: 36px; object-fit: contain; }
.bar-sub { font-size: 13px; color: var(--md-on-surface-variant); white-space: nowrap; }
.progress { height: 4px; background: var(--md-surface-container-high); }
.progress-fill { height: 100%; width: 0; background: var(--md-primary); border-radius: 0 var(--shape-full) var(--shape-full) 0; transition: width .35s var(--motion); }

/* ---- Cards / typography ---- */
.card { background: var(--md-surface-container-low); border-radius: var(--shape-xl); padding: 24px 20px; margin: 20px 0; }
.step-kicker { font-size: 13px; font-weight: 500; color: var(--md-on-surface-variant); margin: 0 0 4px; letter-spacing: .04em; }
h2 { font-size: 24px; font-weight: 500; margin: 0 0 16px; line-height: 1.3; letter-spacing: 0; }
h3 { font-size: 16px; font-weight: 500; margin: 24px 0 8px; color: var(--md-on-surface); }
.help { color: var(--md-on-surface-variant); font-size: 14px; margin: 0 0 12px; }

/* ---- Fields (M3 outlined) ---- */
.field { display: block; margin: 14px 0; }
.field > .label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 6px; color: var(--md-on-surface); }
.label .req { font-size: 11px; font-weight: 500; color: var(--md-on-primary-container); background: var(--md-primary-container); border-radius: var(--shape-full); padding: 1px 8px; margin-left: 8px; vertical-align: middle; }
.label .opt { font-size: 11px; font-weight: 500; color: var(--md-on-surface-variant); background: var(--md-surface-container-high); border-radius: var(--shape-full); padding: 1px 8px; margin-left: 8px; vertical-align: middle; }
input[type=text], input[type=tel], input[type=email], input[type=date], input[type=number], select, textarea {
  width: 100%; font: inherit; font-size: 16px; padding: 14px 16px; border: 1px solid var(--md-outline); border-radius: var(--shape-sm); background: var(--md-surface-container-lowest); color: var(--md-on-surface); min-height: 52px;
  transition: border-color .15s var(--motion), box-shadow .15s var(--motion);
}
select { appearance: none; -webkit-appearance: none; padding-right: 44px; background-image: linear-gradient(45deg, transparent 50%, var(--md-on-surface-variant) 50%), linear-gradient(135deg, var(--md-on-surface-variant) 50%, transparent 50%); background-position: calc(100% - 22px) 50%, calc(100% - 16px) 50%; background-size: 6px 6px, 6px 6px; background-repeat: no-repeat; }
input:focus, select:focus, textarea:focus { outline: none; border: 2px solid var(--md-primary); padding: 13px 15px; }
select:focus { padding-right: 43px; }
textarea { min-height: 96px; resize: vertical; }
.row { display: flex; gap: 12px; }
.row > * { flex: 1; min-width: 0; }
.row .fixed { flex: 0 0 auto; }
.err { color: var(--md-error); font-size: 13px; margin: 6px 0 0 4px; }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: var(--md-error); }

/* ---- Choice lists (radio / checkbox as list items) ---- */
.choices { display: grid; gap: 10px; }
.choices.cols2 { grid-template-columns: 1fr 1fr; }
.choice { display: flex; align-items: center; gap: 12px; padding: 14px 16px; border: 1px solid var(--md-outline-variant); border-radius: var(--shape-lg); background: var(--md-surface-container-lowest); cursor: pointer; min-height: 56px; transition: background .15s var(--motion), border-color .15s var(--motion); }
.choice:hover { background: var(--md-surface-container); }
.choice:has(input:checked) { border-color: var(--md-primary); background: var(--md-primary-container); color: var(--md-on-primary-container); }
.choice input { width: 20px; height: 20px; margin: 0; accent-color: var(--md-primary); flex: none; }
.choice .lbl { font-weight: 500; }
.choice .sub { display: block; color: var(--md-on-surface-variant); font-size: 13px; font-weight: 400; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border: 1px solid var(--md-outline-variant); border-radius: var(--shape-sm); background: var(--md-surface-container-lowest); cursor: pointer; font-size: 14px; min-height: 36px; }
.chip:has(input:checked) { background: var(--md-secondary-container); border-color: var(--md-secondary-container); color: var(--md-on-secondary-container); font-weight: 500; }
.chip input { width: 16px; height: 16px; margin: 0; accent-color: var(--md-primary); }

/* ---- Banners / buttons / nav ---- */
.banner { border-radius: var(--shape-md); padding: 12px 16px; margin: 16px 0; font-size: 14px; }
.banner.error { background: var(--md-error-container); color: var(--md-on-error-container); }
.banner.info { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.nav { display: flex; gap: 12px; justify-content: space-between; margin: 16px 0 32px; }
.btn { font: inherit; font-weight: 500; font-size: 15px; padding: 0 24px; height: 48px; border-radius: var(--shape-full); border: none; cursor: pointer; min-width: 120px; transition: box-shadow .15s var(--motion), filter .15s var(--motion); }
.btn.filled { background: var(--md-primary); color: var(--md-on-primary); margin-left: auto; box-shadow: var(--elev-1); }
.btn.filled:hover { filter: brightness(1.08); box-shadow: var(--elev-2); }
.btn.tonal { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.btn.text { background: transparent; color: var(--md-primary); min-width: 0; padding: 0 12px; height: 40px; }
.btn.small { height: 40px; font-size: 14px; min-width: 0; padding: 0 16px; }
.btn:disabled { opacity: .5; cursor: default; filter: none; box-shadow: none; }
.link { color: var(--md-primary); font-weight: 500; }

/* ---- Slots / confirm / done ---- */
.slot { display: grid; grid-template-columns: 5.5em 1fr 1fr; gap: 10px; align-items: center; margin: 8px 0; }
.slot .ttl { font-size: 14px; font-weight: 500; color: var(--md-on-surface-variant); }
.confirm { display: grid; grid-template-columns: 9em 1fr; gap: 8px 12px; margin: 0; font-size: 15px; }
.confirm dt { color: var(--md-on-surface-variant); font-weight: 500; }
.confirm dd { margin: 0; white-space: pre-wrap; word-break: break-word; }
.confirm .sec { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: center; margin-top: 16px; padding: 6px 0; border-bottom: 1px solid var(--md-outline-variant); font-weight: 500; }
.code { font-family: Roboto, ui-monospace, Menlo, monospace; letter-spacing: .04em; }
.done { text-align: center; padding: 12px 0; }
.done .big { font-size: 22px; font-weight: 500; margin: 8px 0; }
.done .id { font-size: 28px; font-weight: 700; color: var(--md-primary); }
.foot { color: var(--md-on-surface-variant); font-size: 12px; text-align: center; margin: 20px 0 40px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.switch { margin: 20px 0 0; font-size: 14px; }
.switch p { margin: 0 0 4px; }
.switch-title { font-weight: 500; color: var(--md-on-surface); }
@media (max-width: 520px) {
  .confirm { grid-template-columns: 1fr; } .confirm dt { margin-top: 6px; }
  .choices.cols2 { grid-template-columns: 1fr; }
  .slot { grid-template-columns: 1fr; gap: 6px; }
  .bar-sub { display: none; }
  .card { padding: 20px 16px; border-radius: var(--shape-lg); }
}