:root {
  color-scheme: light;
  --ink: #17201f;
  --muted: #596764;
  --paper: #f7f5ef;
  --panel: #fffdf8;
  --accent: #8f2f24;
  --accent-dark: #6d2119;
  --line: #d9d4c8;
  --success: #235c48;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(120deg, rgba(143, 47, 36, .07), transparent 32rem),
    var(--paper);
  font-family: "Noto Sans JP", "Yu Gothic", system-ui, sans-serif;
}

.shell { width: min(42rem, calc(100% - 2rem)); margin: 0 auto; padding: 4rem 0; }
header { margin-bottom: 1.5rem; }
.header-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: .55rem; }
.eyebrow { margin: 0 0 .35rem; color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .18em; }
.language-switch { display: inline-flex; flex: 0 0 auto; overflow: hidden; border: 1px solid var(--accent); border-radius: .5rem; }
.language-switch button { margin: 0; border-radius: 0; padding: .42rem .65rem; color: var(--accent); background: transparent; font-size: .74rem; }
.language-switch button + button { border-left: 1px solid var(--accent); }
.language-switch button[aria-pressed="true"] { color: white; background: var(--accent); }
.language-switch button:hover { color: white; background: var(--accent-dark); }
h1 { margin: 0; font-size: clamp(1.8rem, 6vw, 3rem); letter-spacing: -.035em; }
.panel, .message { border: 1px solid var(--line); border-radius: 1rem; background: var(--panel); box-shadow: 0 1.2rem 3rem rgba(23, 32, 31, .08); }
.panel { padding: clamp(1.25rem, 5vw, 2.25rem); }
.panel h2 { margin-top: 0; }
.panel p { color: var(--muted); line-height: 1.75; }
.contact-line { font-size: .9rem; }
.event-summary { margin: 0 0 1rem; border-left: .3rem solid var(--accent); padding: .85rem 1rem; background: rgba(255, 253, 248, .75); }
.event-summary p { margin: 0; }
.event-summary > div:not([hidden]) + div { margin-top: .75rem; }
#event-venue { white-space: pre-line; }
.event-summary-label { color: var(--muted); font-size: .82rem; font-weight: 700; }
.event-schedule { margin-top: .2rem !important; font-size: 1.08rem; font-weight: 800; }
form { display: grid; gap: .65rem; margin-top: 1.5rem; }
label { margin-top: .4rem; font-size: .9rem; font-weight: 700; }
fieldset { margin: .75rem 0 0; border: 1px solid var(--line); border-radius: .65rem; padding: .8rem; }
legend { padding: 0 .35rem; font-size: .9rem; font-weight: 800; }
.name-fields { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.name-fields label { display: grid; gap: .4rem; margin: 0; }
input, select { width: 100%; border: 1px solid #aaa69c; border-radius: .55rem; padding: .8rem .9rem; color: var(--ink); background: white; font: inherit; }
input:focus, select:focus { outline: 3px solid rgba(143, 47, 36, .18); border-color: var(--accent); }
input[readonly] { background: #eeece5; color: var(--muted); }
button { margin-top: 1rem; border: 0; border-radius: .55rem; padding: .9rem 1.2rem; color: white; background: var(--accent); font: inherit; font-weight: 800; cursor: pointer; }
button:hover { background: var(--accent-dark); }
button:disabled { opacity: .55; cursor: wait; }
.button-row { display: flex; justify-content: flex-end; gap: .75rem; margin-top: 1.2rem; }
.button-row button { margin-top: 0; }
button.secondary { border: 1px solid var(--accent); color: var(--accent); background: transparent; }
button.secondary:hover { color: white; background: var(--accent); }
.message { margin-bottom: 1rem; padding: 1rem 1.2rem; color: #7b231b; }
.message.success { color: var(--success); }
.error-navigation { margin: -.25rem 0 1.25rem; text-align: right; }
.error-navigation a { color: var(--accent); font-weight: 700; }
.error-navigation a:hover { color: var(--accent-dark); }
.deadline { padding: .65rem .8rem; background: #f1eee5; border-radius: .45rem; }
.complete { text-align: center; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; margin: 0 0 2rem; padding: 0; list-style: none; color: var(--muted); text-align: center; }
.steps li { border-bottom: .2rem solid var(--line); padding: .4rem; font-size: 1.15rem; font-weight: 800; }
.steps li.active { border-color: var(--accent); color: var(--accent); }
.steps span { display: block; font-size: .7rem; font-weight: 600; }
.check { display: grid; place-items: center; width: 3.5rem; height: 3.5rem; margin: 0 auto 1rem !important; border-radius: 50%; color: white !important; background: var(--success); font-size: 1.8rem; }
dl { margin: 1.5rem 0 0; text-align: left; }
dl div { display: grid; grid-template-columns: 7rem 1fr; gap: 1rem; padding: .8rem 0; border-top: 1px solid var(--line); }
dt { color: var(--muted); }
dd { margin: 0; font-weight: 700; overflow-wrap: anywhere; }
.terms-consent { display: flex; align-items: flex-start; gap: .7rem; margin-top: 1.5rem; padding: 1rem; border: 1px solid var(--line); border-radius: .65rem; background: #f1eee5; }
.terms-consent input { flex: 0 0 auto; width: 1.15rem; height: 1.15rem; margin: .15rem 0 0; accent-color: var(--accent); }
.terms-consent label { margin: 0; line-height: 1.6; }

@media (max-width: 36rem) {
  .shell { padding: 2rem 0; }
  .header-top { align-items: stretch; flex-direction: column; }
  .language-switch { align-self: flex-start; }
  .name-fields { grid-template-columns: 1fr; }
  .button-row { align-items: stretch; flex-direction: column-reverse; }
  dl div { grid-template-columns: 1fr; gap: .2rem; }
}