:root {
  --ink: #26344c;
  --muted: #5f7088;
  --line: #d8e2ec;
  --paper: #f4f7fb;
  --accent: #5f91b3;
  --accent-dark: #315476;
  --coral: #e66f72;
  --soft-blue: #dcecf6;
  --error: #a92e3f;
}

* { box-sizing: border-box; }
html, body { max-width: 100%; overflow-x: hidden; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif; line-height: 1.75; }
.container { width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 42px 0 72px; }
.form-header { margin-bottom: 24px; }
.eyebrow { margin: 0; color: var(--accent-dark); font-weight: 800; letter-spacing: .08em; }
h1 { margin: .15em 0 .7em; font-size: clamp(1.75rem, 5vw, 2.55rem); line-height: 1.35; overflow-wrap: anywhere; }
h2 { margin: 1.4em 0 .35em; font-size: 1.1rem; }
.intro { min-width: 0; padding: 20px 22px; border-left: 6px solid var(--coral); border-radius: 12px; background: #fff; box-shadow: 0 4px 16px rgba(38,52,76,.06); overflow-wrap: anywhere; }
.intro p { margin: .35em 0; }
.event-info { min-width: 0; margin: 0 0 24px; overflow: hidden; border: 1px solid #c8d9e7; border-radius: 14px; background: #fff; box-shadow: 0 5px 18px rgba(38,52,76,.07); overflow-wrap: anywhere; }
.event-info > h2 { margin: 0; padding: 12px 18px; color: var(--accent-dark); background: var(--soft-blue); border-bottom: 1px solid #c8d9e7; }
.event-info dl { margin: 0; }
.event-info dl div { display: grid; grid-template-columns: 7.5em 1fr; border-bottom: 1px solid #e6ebf1; }
.event-info dt, .event-info dd { margin: 0; padding: 12px 18px; }
.event-info dt { font-weight: 800; color: #435875; background: #f8fafc; }
.event-info dd { font-weight: 650; }
.event-info ul { margin: 0; padding: 14px 22px 16px 40px; color: var(--muted); background: #fbfcfe; }
.notice, .errors { margin: 0 0 20px; padding: 13px 16px; border-left: 5px solid var(--coral); border-radius: 8px; background: #fff4f3; }
.errors { color: var(--error); }
.errors p { margin-top: 0; font-weight: 800; }
form { min-width: 0; padding: clamp(18px, 4vw, 32px); border: 1px solid var(--line); border-radius: 14px; background: #fff; box-shadow: 0 4px 16px rgba(38,52,76,.05); overflow-wrap: anywhere; }
.trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.field { margin: 0 0 24px; padding: 0; border: 0; }
.field legend { margin-bottom: 7px; font-weight: 800; }
.required { margin-left: 8px; padding: 2px 6px; border-radius: 4px; background: var(--coral); color: #fff; font-size: .72rem; }
.choices { display: grid; gap: 6px; }
.choices label, .consent { display: block; padding: 7px 0; }
input[type="text"], input[type="email"], textarea { width: 100%; padding: 11px 12px; border: 1px solid #aab9c8; border-radius: 8px; background: #fff; color: var(--ink); font: inherit; }
input:focus, textarea:focus { outline: 3px solid rgba(95,145,179,.22); border-color: var(--accent-dark); }
.help { margin: 6px 0 0; color: var(--muted); font-size: .92rem; }
.event-line { margin: 0 0 24px; padding: 13px 15px; border-left: 5px solid var(--accent); background: #edf5fa; font-weight: 750; }
.final-notes { margin: 0 0 18px; padding: 14px 16px; border-radius: 10px; background: #f7f9fc; color: var(--muted); }
.final-notes p { margin: .2em 0; }
.final-notes .negative-note { color: var(--error); font-weight: 800; }
button { padding: 12px 22px; border: 0; border-radius: 9px; background: var(--accent-dark); color: #fff; font: inherit; font-weight: 800; cursor: pointer; }
button:hover { background: #203f5e; }
button.secondary { color: var(--accent-dark); background: #e5edf4; }
.confirm { overflow: hidden; margin: 0 0 20px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.confirm div { padding: 14px 18px; border-bottom: 1px solid var(--line); }
.confirm div:last-child { border-bottom: 0; }
.confirm dt { font-weight: 800; }
.confirm dd { margin: 4px 0 0; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.actions form { padding: 0; border: 0; box-shadow: none; }
.result { padding: 44px 22px; border: 1px solid var(--line); border-radius: 14px; background: #fff; text-align: center; }
[hidden] { display: none !important; }

@media (max-width: 560px) {
  .container { padding-top: 24px; }
  h1 { font-size: 1.75rem; }
  .intro { padding: 18px; }
  .event-info dl div { grid-template-columns: 1fr; }
  .event-info dt { padding: 10px 16px 2px; background: #fff; }
  .event-info dd { padding: 0 16px 11px; }
  form { padding: 18px; }
}