:root {
  --ink: #0d0d0d;
  --paper: #ffffff;
  --muted: #6b6b6b;
  --line: #e4e4e4;
  --koi: #e4572e;
  --koi-dark: #c2401a;
  --ok: #1f7a4d;
  --radius: 14px;
  --display: "Anton", "Impact", "Arial Narrow", sans-serif;
  --body: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}

a { color: inherit; text-underline-offset: 3px; }
a:hover { color: var(--koi); }

[hidden] { display: none !important; }

.muted { color: var(--muted); }
em { font-style: normal; color: var(--muted); font-size: 0.85em; }

/* ---------- Header ---------- */

.site-header {
  display: flex;
  align-items: center;
  gap: clamp(12px, 4vw, 32px);
  max-width: 960px;
  margin: 0 auto;
  padding: clamp(16px, 5vw, 40px) 20px 8px;
}

.logo {
  width: clamp(96px, 24vw, 180px);
  height: auto;
  flex-shrink: 0;
}

h1 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(2rem, 7vw, 3.6rem);
  line-height: 0.95;
  margin: 0 0 8px;
  letter-spacing: 0.01em;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Sections ---------- */

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--ink);
}

h2 span {
  font-family: var(--body);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--muted);
  margin-left: 8px;
}

.events {
  display: grid;
  gap: 24px;
}

.empty {
  padding: 24px;
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

/* ---------- Event card ---------- */

.event {
  display: grid;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper);
}

@media (min-width: 760px) {
  .event { grid-template-columns: 1.1fr 1fr; }
  .event__image { height: 100%; object-fit: contain; }
}

.event__image {
  display: block;
  width: 100%;
  aspect-ratio: 858 / 486;
  object-fit: cover;
  background: #111;
}

.event__body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.event__date {
  margin: 0;
  font-weight: 700;
  color: var(--koi);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.9rem;
}

.event__date span { text-transform: none; margin-left: 6px; }

.event__title {
  font-family: var(--display);
  font-weight: 400;
  font-size: 2.4rem;
  line-height: 1;
  margin: 0;
}

.event__series { margin: 0; color: var(--muted); font-size: 0.95rem; }

.event__meta { margin: 4px 0 0; display: grid; gap: 4px; font-size: 0.95rem; }
.event__meta div { display: grid; grid-template-columns: 72px 1fr; gap: 8px; }
.event__meta dt { color: var(--muted); }
.event__meta dd { margin: 0; }

.event__acts {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.event__acts li {
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  padding: 2px 12px;
  font-weight: 700;
  font-size: 0.9rem;
}

.event__acts a { text-decoration: none; }

.event__tags { margin: 0; color: var(--muted); font-size: 0.85rem; }

.event .btn { margin-top: auto; align-self: flex-start; }

.events--past .event { border-color: var(--line); }
.events--past .event__image { filter: grayscale(1); opacity: 0.8; }

/* ---------- Buttons ---------- */

.btn {
  font: inherit;
  font-weight: 700;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  border-radius: 999px;
  padding: 12px 24px;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.15s ease;
}

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.6; cursor: progress; }

.btn--primary {
  background: var(--koi);
  border-color: var(--koi);
  color: #fff;
  font-size: 1.05rem;
}

.btn--primary:hover { background: var(--koi-dark); border-color: var(--koi-dark); color: #fff; }

.btn--done { border-color: var(--ok); color: var(--ok); }

.btn--block { display: block; width: 100%; margin-top: 8px; }

/* ---------- RSVP dialog ---------- */

dialog {
  width: min(520px, calc(100vw - 24px));
  max-height: calc(100dvh - 24px);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 0;
  color: var(--ink);
}

dialog::backdrop { background: rgba(0, 0, 0, 0.6); }

#rsvp-form, .rsvp-done { position: relative; padding: 24px 22px; }

.dialog-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 36px;
  height: 36px;
  border: 0;
  background: none;
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
  color: var(--muted);
}

.rsvp-kicker {
  margin: 0;
  color: var(--koi);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
}

dialog h3 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 2rem;
  line-height: 1.05;
  margin: 4px 0;
}

.rsvp-when { margin: 0 0 8px; color: var(--muted); font-size: 0.9rem; }

fieldset {
  border: 0;
  padding: 0;
  margin: 18px 0 0;
}

legend { font-weight: 700; padding: 0; margin-bottom: 8px; }
.req { color: var(--koi); }

.choices { display: grid; gap: 6px; }
.choices--nested {
  margin: 8px 0 0 14px;
  padding-left: 12px;
  border-left: 3px solid var(--line);
}

.choices--inline { grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); }

.choice {
  position: relative;
  display: block;
  cursor: pointer;
}

.choice input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.choice > span {
  display: block;
  padding: 10px 14px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  transition: border-color 0.12s ease, background 0.12s ease;
}

.choice:hover > span { border-color: var(--ink); }
.choice input:checked + span { border-color: var(--ink); background: var(--ink); color: #fff; }
.choice input:checked + span em { color: #bbb; }
.choice input:focus-visible + span { outline: 3px solid var(--koi); outline-offset: 2px; }

.row { display: grid; grid-template-columns: 1fr 96px; gap: 12px; margin-top: 18px; align-items: start; }

.field { display: grid; gap: 6px; font-weight: 700; }
fieldset .field { margin-top: 10px; }

input[type="text"], input[type="tel"], input[type="email"], input[type="number"], input:not([type]) {
  font: inherit;
  font-weight: 400;
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}

input:focus { outline: none; border-color: var(--ink); }

.checkbox {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-top: 16px;
  color: var(--ink);
  cursor: pointer;
}

.checkbox input { width: 22px; height: 22px; margin: 1px 0 0; accent-color: var(--koi); flex-shrink: 0; }

.privacy-note { margin: 10px 0 0; color: var(--muted); font-size: 0.8rem; }

.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.field-error, .form-error { color: var(--koi-dark); font-size: 0.88rem; margin: 6px 0 0; }
.form-error { margin-top: 16px; }

.rsvp-done p { margin: 8px 0; }

/* ---------- Footer ---------- */

.site-footer {
  text-align: center;
  padding: 24px 20px 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}