:root {
  --bg-0: #050610;
  --bg-1: #0b0d1c;
  --bg-2: #131527;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.18);
  --ink: #f4f4f8;
  --ink-mute: rgba(244, 244, 248, 0.62);
  --ink-dim: rgba(244, 244, 248, 0.4);
  --gold: #d8b25a;
  --gold-bright: #f0d27a;
  --accent: #7c8cff;
  --danger: #ff6b6b;
  --ok: #5bd49c;
  --radius: 14px;
  --radius-sm: 8px;
  --max: 880px;
  --t-fast: 160ms;
  --t-mid: 280ms;
  font-family: "Zen Kaku Gothic New", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; background: var(--bg-0); color: var(--ink); -webkit-text-size-adjust: 100%; }
body { min-height: 100vh; line-height: 1.55; overflow-x: hidden; }

/* Background aurora */
.aurora {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(60% 50% at 20% 10%, rgba(124, 140, 255, 0.18), transparent 70%),
    radial-gradient(50% 50% at 85% 30%, rgba(216, 178, 90, 0.14), transparent 70%),
    radial-gradient(60% 60% at 50% 100%, rgba(124, 140, 255, 0.10), transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
}
.aurora::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 30%, #000 30%, transparent 80%);
}

/* Top bar */
.topbar {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  padding: 24px clamp(20px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  text-decoration: none; color: inherit;
}
.brand-logo {
  width: 56px; height: 56px; object-fit: contain;
  filter: drop-shadow(0 4px 14px rgba(216, 178, 90, 0.5));
}
.brand-text { display: inline-flex; flex-direction: column; line-height: 1.1; }
.brand-line1 {
  font-family: "Inter", system-ui, sans-serif;
  font-weight: 800; font-size: 13px; letter-spacing: 0.10em;
  background: linear-gradient(180deg, #fff 0%, var(--gold-bright) 100%);
  background-clip: text; -webkit-background-clip: text; color: transparent;
}
.brand-line2 {
  font-family: "Inter", system-ui, sans-serif;
  font-weight: 500; font-size: 11px; color: var(--ink-mute); letter-spacing: 0.18em;
}
.topbar-meta {
  font-family: "Inter", system-ui, sans-serif;
  font-size: 12px; color: var(--ink-dim); letter-spacing: 0.18em; text-transform: uppercase;
}
@media (max-width: 640px) {
  .topbar-meta { display: none; }
  .topbar { padding: 18px 20px; }
}

/* Shell */
.shell {
  position: relative; z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(40px, 8vw, 96px) clamp(20px, 5vw, 48px) 80px;
}

/* Intro bar (compact) */
.intro-bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; padding: 18px 22px; margin: 0 0 24px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(216,178,90,0.06) 0%, rgba(255,255,255,0.01) 100%);
  animation: fadeUp 360ms ease both;
}
.intro-bar-text { display: flex; flex-direction: column; gap: 4px; }
.intro-bar-kicker {
  font-family: "Inter", "Zen Kaku Gothic New", system-ui, sans-serif;
  font-size: 11px; letter-spacing: 0.16em; color: var(--ink-dim); text-transform: uppercase;
  margin: 0;
}
.intro-bar-period {
  margin: 0; font-size: 14px; color: var(--ink-mute);
}
.intro-bar-period b {
  color: var(--gold-bright); font-weight: 700; margin-left: 4px;
}
.intro-bar-period.sub { font-size: 13px; color: var(--ink-dim); margin-top: 2px; }
.intro-bar-period.sub b { color: var(--gold); }
.intro-bar-period .note-small { font-size: 11px; color: var(--ink-dim); display: inline-block; margin-top: 2px; }
.intro-bar-link {
  font-family: "Inter", system-ui, sans-serif;
  font-size: 12px; color: var(--ink-mute); text-decoration: none;
  white-space: nowrap; letter-spacing: 0.04em;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.intro-bar-link:hover { color: var(--gold-bright); border-bottom-color: var(--gold-bright); }
@media (max-width: 640px) {
  .intro-bar { flex-direction: column; align-items: flex-start; gap: 12px; padding: 16px 18px; }
}

/* Hero (legacy, kept for old screens — currently unused) */
.hero { text-align: left; animation: fadeUp 600ms ease both; }
.kicker {
  display: inline-flex; align-items: center; gap: 14px;
  font-family: "Inter", system-ui, sans-serif;
  font-size: 11px; color: var(--gold-bright);
  text-transform: uppercase; letter-spacing: 0.32em; margin-bottom: 28px;
}
.kicker::before { content: ""; width: 32px; height: 1px; background: var(--gold-bright); opacity: 0.7; }
.hero-title {
  font-weight: 900; font-size: clamp(56px, 11vw, 132px); line-height: 0.95;
  letter-spacing: -0.02em; margin: 0 0 18px;
}
.hero-title-accent {
  display: inline-block;
  background: linear-gradient(180deg, var(--gold-bright) 0%, var(--gold) 90%);
  background-clip: text; -webkit-background-clip: text; color: transparent;
}
.hero-sub {
  font-weight: 500; font-size: clamp(15px, 1.8vw, 19px);
  color: var(--ink-mute); margin: 0 0 40px; letter-spacing: 0.04em;
}
.hero-meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px; margin: 0 0 48px;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 22px 0;
}
.hero-meta > div { display: flex; flex-direction: column; gap: 4px; }
.hero-meta-k {
  font-family: "Inter", system-ui, sans-serif;
  font-size: 10px; letter-spacing: 0.24em; color: var(--ink-dim); text-transform: uppercase;
}
.hero-meta-v {
  font-weight: 700; font-size: 16px; color: var(--ink);
}

/* Hero schedule (collapsible) */
.hero-schedule {
  margin: 0 0 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
}
.hero-schedule summary {
  list-style: none;
  cursor: pointer; user-select: none;
  padding: 16px 22px;
  display: flex; align-items: center; justify-content: space-between;
  font-family: "Inter", system-ui, sans-serif;
  font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--gold-bright);
  transition: background var(--t-fast);
}
.hero-schedule summary::-webkit-details-marker { display: none; }
.hero-schedule summary:hover { background: rgba(216, 178, 90, 0.05); }
.hero-schedule summary span {
  font-size: 14px; transition: transform var(--t-fast);
}
.hero-schedule[open] summary span { transform: rotate(180deg); }
.schedule-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  padding: 8px 22px 18px; border-top: 1px solid var(--line);
}
.schedule-grid .schedule-block:last-child { grid-column: 1 / -1; }
.schedule-block h3 {
  font-size: 13px; font-weight: 800; letter-spacing: 0.04em;
  color: var(--gold-bright); margin: 0 0 10px;
  padding-bottom: 6px; border-bottom: 1px solid rgba(216, 178, 90, 0.25);
}
.schedule-block ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 4px;
}
.schedule-block li {
  font-size: 13px; color: var(--ink-mute); display: flex; gap: 10px;
}
.schedule-block li b {
  color: var(--ink); font-weight: 600;
  min-width: 130px; flex-shrink: 0;
}
.schedule-note, .schedule-disclaimer {
  font-size: 12px; color: var(--ink-dim); margin: 10px 22px 0;
  line-height: 1.6;
}
.schedule-disclaimer { padding: 0 0 18px; }
@media (max-width: 720px) {
  .schedule-grid { grid-template-columns: 1fr; gap: 18px; padding: 8px 18px 14px; }
  .schedule-block li { flex-direction: column; gap: 0; }
  .schedule-block li b { min-width: 0; }
}

/* Buttons */
.btn-primary {
  appearance: none; border: 0;
  background: linear-gradient(180deg, var(--gold-bright) 0%, var(--gold) 100%);
  color: #1a1a2e;
  font-family: inherit; font-weight: 800; font-size: 15px; letter-spacing: 0.06em;
  padding: 18px 32px; border-radius: 999px; cursor: pointer;
  box-shadow: 0 10px 30px -8px rgba(216, 178, 90, 0.45), inset 0 1px 0 rgba(255,255,255,0.5);
  transition: transform var(--t-fast) ease, box-shadow var(--t-fast) ease, filter var(--t-fast) ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -10px rgba(216, 178, 90, 0.55), inset 0 1px 0 rgba(255,255,255,0.5); }
.btn-primary:active { transform: translateY(0); }
.btn-primary[disabled] { filter: grayscale(0.4) brightness(0.7); cursor: not-allowed; }

.btn-ghost {
  appearance: none; border: 1px solid var(--line-strong); background: transparent;
  color: var(--ink-mute); font-family: inherit; font-weight: 600; font-size: 14px;
  padding: 16px 26px; border-radius: 999px; cursor: pointer; letter-spacing: 0.04em;
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease, background var(--t-fast) ease;
}
.btn-ghost:hover { color: var(--ink); border-color: rgba(255,255,255,0.35); background: rgba(255,255,255,0.03); }

/* Form wrap */
.form-wrap { animation: fadeUp 500ms ease both; }
.steps {
  display: flex; gap: 8px; margin: 0 0 36px;
  border-bottom: 1px solid var(--line); padding-bottom: 18px;
  overflow-x: auto; scrollbar-width: none;
}
.steps::-webkit-scrollbar { display: none; }
.steps button {
  appearance: none; border: 0; background: transparent;
  color: var(--ink-dim); font-family: "Inter", system-ui, sans-serif;
  font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
  padding: 8px 14px; border-radius: 999px; cursor: pointer; white-space: nowrap;
  transition: color var(--t-fast), background var(--t-fast);
}
.steps button:hover { color: var(--ink-mute); }
.steps button.is-active { color: var(--bg-0); background: var(--gold-bright); }
.steps button.is-done { color: var(--ok); }

.step { animation: fadeUp 360ms ease both; }
.step-head { display: flex; align-items: baseline; gap: 18px; margin: 0 0 30px; }
.step-num {
  font-family: "Inter", system-ui, sans-serif; font-weight: 800;
  font-size: 12px; letter-spacing: 0.2em; color: var(--gold-bright);
  border: 1px solid rgba(216, 178, 90, 0.4);
  padding: 4px 10px; border-radius: 6px;
}
.step-head h2 { font-weight: 800; font-size: 26px; letter-spacing: -0.01em; margin: 0; }
.step-sub { font-size: 13px; color: var(--ink-mute); margin: 4px 0 0; }

/* Field */
.field { margin: 0 0 22px; display: flex; flex-direction: column; gap: 8px; }
.field label, .field legend {
  font-size: 13px; font-weight: 600; color: var(--ink); letter-spacing: 0.02em;
  display: inline-flex; align-items: center; gap: 6px;
}
.field label em, .field legend em { color: var(--gold-bright); font-style: normal; }
.field-hint { font-size: 12px; color: var(--ink-dim); margin: 0; }
.field input[type="text"],
.field input[type="email"],
.field input[type="url"],
.field input[type="number"],
.field select,
.field textarea {
  appearance: none;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: inherit; font-size: 15px; line-height: 1.4;
  padding: 14px 16px; border-radius: var(--radius-sm);
  transition: border-color var(--t-fast), background var(--t-fast), box-shadow var(--t-fast);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--gold-bright); background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 0 3px rgba(216, 178, 90, 0.18);
}
.field input::placeholder, .field textarea::placeholder { color: var(--ink-dim); }
.field select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' stroke='%23f4f4f8' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat; background-position: right 16px center; padding-right: 42px;
  color-scheme: dark; /* Windows/Linux native option popup をダーク化 */
}
.field select option {
  background: #14141c;
  color: #f4f4f8;
}
.field select option:disabled {
  color: #6a6a78;
}
.field input.is-invalid, .field select.is-invalid, .field textarea.is-invalid {
  border-color: var(--danger); box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.18);
}

.field input[readonly] { background: rgba(255, 255, 255, 0.02); color: var(--ink-mute); }

/* Email typo suggestion */
.email-suggest {
  margin: 6px 0 0; font-size: 12px; color: var(--ink-mute);
  animation: fadeUp 200ms ease both;
}
.email-suggest .suggest-link {
  appearance: none; background: rgba(216,178,90,0.06);
  border: 1px dashed var(--gold-bright);
  color: var(--gold-bright);
  font-family: inherit; font-size: 12px; font-weight: 600;
  cursor: pointer; padding: 3px 8px; margin-left: 4px;
  border-radius: 4px;
  transition: background var(--t-fast);
}
.email-suggest .suggest-link:hover { background: rgba(216,178,90,0.18); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 640px) { .grid-2 { grid-template-columns: 1fr; } }

/* Consent / radio */
.consent { border: 0; padding: 0; margin: 0 0 22px; display: flex; flex-direction: column; gap: 12px; }
.consent legend { margin-bottom: 8px; padding: 0; }
.consent.is-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px 16px;
}
.consent.is-grid legend { grid-column: 1 / -1; }
@media (max-width: 720px) {
  .consent.is-grid { grid-template-columns: repeat(2, 1fr); }
}
.radio { display: inline-flex; align-items: center; gap: 12px; cursor: pointer; user-select: none; }
#japanVenueRadios { display: flex; flex-direction: column; gap: 12px; }
.radio input { appearance: none; width: 20px; height: 20px; border: 1px solid var(--line-strong); border-radius: 50%; position: relative; transition: border-color var(--t-fast); }
.radio input:invalid { border-color: var(--line-strong); box-shadow: none; outline: none; }
.radio input:checked { border-color: var(--gold-bright); }
.radio input:checked::after { content: ""; position: absolute; inset: 4px; border-radius: 50%; background: var(--gold-bright); }
.radio span { color: var(--ink-mute); font-size: 14px; }
.radio input:checked + span { color: var(--ink); }

/* Checkbox group (parts) */
.checks { display: flex; flex-wrap: wrap; gap: 8px; }
.other-text { margin-top: 10px; animation: fadeUp 200ms ease both; }
.other-text input {
  width: 100%;
  appearance: none;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: inherit; font-size: 14px;
  padding: 12px 14px; border-radius: var(--radius-sm);
  transition: border-color var(--t-fast), background var(--t-fast);
}
.other-text input:focus {
  outline: none; border-color: var(--gold-bright); background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 0 3px rgba(216, 178, 90, 0.18);
}
.check {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 14px; border: 1px solid var(--line);
  border-radius: 999px; cursor: pointer; user-select: none;
  font-size: 13px; color: var(--ink-mute);
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.check input { display: none; }
.check.is-checked { border-color: var(--gold-bright); color: var(--ink); background: rgba(216, 178, 90, 0.08); }

/* Members */
.member-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.02) 0%, rgba(255,255,255,0) 100%);
  border-radius: var(--radius); padding: 24px; margin: 0 0 16px;
  min-width: 0;
}
.field, .field input, .field select, .field textarea { min-width: 0; }
.field input, .field select, .field textarea { max-width: 100%; }
@media (max-width: 640px) {
  .shell { padding: 32px 16px 60px; }
  .member-card { padding: 18px 16px; }
}
.member-card-head {
  display: flex; align-items: baseline; gap: 12px; margin: 0 0 18px;
  padding-bottom: 14px; border-bottom: 1px solid var(--line);
}
.member-card-num {
  font-family: "Inter", system-ui, sans-serif; font-weight: 800; font-size: 11px;
  letter-spacing: 0.24em; color: var(--gold-bright);
}
.member-card-title { font-weight: 700; font-size: 16px; margin: 0; }
.member-card .grid-2 { gap: 14px; }
.member-card .field { margin: 0 0 14px; }

/* Rep preview */
.rep-preview {
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 12px 16px; margin-top: 8px; display: flex; gap: 24px;
  background: rgba(216, 178, 90, 0.05);
}
.rep-preview-k {
  display: block;
  font-family: "Inter", system-ui, sans-serif; font-size: 10px;
  letter-spacing: 0.2em; color: var(--gold-bright); text-transform: uppercase;
  margin-bottom: 2px;
}

/* Review */
.review {
  display: flex; flex-direction: column; gap: 10px;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; background: rgba(255, 255, 255, 0.02);
}
.review-row {
  display: grid; grid-template-columns: 200px 1fr; gap: 16px;
  padding: 10px 0; border-bottom: 1px solid var(--line);
}
.review-row:last-child { border-bottom: 0; }
.review-row .k { font-size: 12px; color: var(--ink-dim); letter-spacing: 0.04em; }
.review-row .v { font-size: 14px; color: var(--ink); white-space: pre-wrap; word-break: break-word; }
@media (max-width: 640px) {
  .review-row { grid-template-columns: 1fr; gap: 4px; }
}

/* Actions */
.actions {
  display: flex; align-items: center; gap: 12px; margin-top: 36px;
  padding-top: 24px; border-top: 1px solid var(--line);
}
.actions-spacer { flex: 1; }

/* Thanks */
.thanks {
  text-align: center; padding: 80px 20px; animation: fadeUp 500ms ease both;
}
.thanks-mark {
  width: 84px; height: 84px; margin: 0 auto 28px;
  display: grid; place-items: center;
  border-radius: 50%; background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  color: #1a1a2e; font-size: 36px; font-weight: 900;
  box-shadow: 0 20px 50px -12px rgba(216, 178, 90, 0.5);
}
.thanks h2 { font-weight: 800; font-size: 32px; margin: 0 0 14px; letter-spacing: -0.01em; }
.thanks p { color: var(--ink-mute); margin: 0; }
.thanks a { color: var(--gold-bright); text-decoration: none; border-bottom: 1px solid currentColor; }
.thanks .thanks-note {
  margin: 28px auto 0;
  padding: 18px 22px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  font-size: 13px; line-height: 1.7;
  color: var(--ink-dim);
  max-width: 560px;
  background: rgba(255, 255, 255, 0.02);
  text-align: center;
}

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: rgba(255, 107, 107, 0.95); color: #fff;
  padding: 14px 22px; border-radius: 999px; font-size: 14px; font-weight: 600;
  box-shadow: 0 14px 32px -8px rgba(0,0,0,0.5);
  z-index: 99; animation: fadeUp 240ms ease both;
}
.toast.is-ok { background: rgba(91, 212, 156, 0.95); color: #08221a; }

/* Footer */
.footer {
  position: relative; z-index: 1; padding: 40px 24px 32px;
  border-top: 1px solid var(--line); margin-top: 60px;
  display: flex; flex-direction: column; align-items: center; gap: 22px;
}
.footer-hp {
  display: inline-flex; align-items: center;
  text-decoration: none; color: var(--gold-bright);
  padding: 14px 36px;
  font-family: "Inter", system-ui, sans-serif;
  font-size: 14px; font-weight: 700; letter-spacing: 0.10em;
  border: 1.5px solid var(--gold-bright); border-radius: 999px;
  background: rgba(216, 178, 90, 0.06);
  box-shadow: 0 8px 24px -8px rgba(216, 178, 90, 0.35), inset 0 1px 0 rgba(255,255,255,0.08);
  transition: background var(--t-fast), transform var(--t-fast), color var(--t-fast), box-shadow var(--t-fast);
}
.footer-hp:hover {
  background: linear-gradient(180deg, var(--gold-bright) 0%, var(--gold) 100%);
  color: #1a1a2e;
  transform: translateY(-2px);
  box-shadow: 0 14px 32px -8px rgba(216, 178, 90, 0.55), inset 0 1px 0 rgba(255,255,255,0.5);
}
.footer-hp-k {
  font-family: "Inter", system-ui, sans-serif;
  font-size: 9px; letter-spacing: 0.24em; color: var(--ink-dim); text-transform: uppercase;
}
.footer-hp-v {
  font-weight: 700; font-size: 14px; color: var(--gold-bright); letter-spacing: 0.04em;
}
.footer-sponsor {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 12px 18px; border: 1px solid var(--line);
  border-radius: var(--radius-sm); background: rgba(255,255,255,0.02);
}
.footer-sponsor-k {
  font-family: "Inter", system-ui, sans-serif;
  font-size: 9px; letter-spacing: 0.24em; color: var(--ink-dim); text-transform: uppercase;
}
.footer-sponsor a {
  display: inline-flex; line-height: 0;
  transition: opacity var(--t-fast), transform var(--t-fast);
}
.footer-sponsor a:hover { opacity: 0.85; transform: translateY(-1px); }
.footer-sponsor img {
  height: 24px; width: auto; display: block;
  border-radius: 3px;
}
.footer-copy {
  font-size: 11px; color: var(--ink-dim); letter-spacing: 0.04em;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Submitting state */
.is-submitting { pointer-events: none; opacity: 0.6; }