:root {
  color-scheme: dark;
  font-family: "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
  background: #020817;
  color: #f8fbff;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: #020817; }
body { background: radial-gradient(circle at 50% 12%, #092b62 0, #020817 46%); }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.homepage-shell {
  position: relative;
  width: min(100%, 720px);
  margin: 0 auto;
  line-height: 0;
  box-shadow: 0 0 90px rgba(0, 96, 255, .18);
}
.homepage-image { display: block; width: 100%; height: auto; }
.hotspot {
  position: absolute;
  left: var(--left); top: var(--top); width: var(--width); height: var(--height);
  z-index: 2; cursor: pointer; border: 2px solid transparent; border-radius: 12%;
  background: transparent; transition: .16s ease;
}
.hotspot:hover, .hotspot:focus-visible {
  outline: none; border-color: rgba(99, 221, 246, .9);
  box-shadow: 0 0 30px rgba(43, 193, 255, .68); transform: scale(.985);
}

.modal[hidden] { display: none; }
.modal { position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; padding: 14px; }
.modal-backdrop { position: absolute; inset: 0; border: 0; background: rgba(0, 5, 18, .78); backdrop-filter: blur(7px); cursor: default; }
.modal-card {
  position: relative; z-index: 1; width: min(780px, 100%); max-height: min(94vh, 1000px); overflow: auto;
  border: 1px solid rgba(89, 216, 255, .35); border-radius: 22px;
  background: linear-gradient(150deg, #081b3c, #040e21 70%);
  box-shadow: 0 0 60px rgba(36, 175, 255, .26); padding: 24px;
}
.modal-close {
  position: absolute; right: 14px; top: 12px; z-index: 2; width: 38px; height: 38px;
  border: 0; border-radius: 50%; color: white; background: rgba(255,255,255,.08); font-size: 28px; cursor: pointer;
}
.modal-header { padding: 0 44px 16px 0; border-bottom: 1px solid rgba(255,255,255,.1); }
.modal-header p { margin: 0 0 6px; color: #66dcf7; font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.modal-header h1 { margin: 0; font-size: clamp(26px, 6vw, 36px); line-height: 1.2; }
.modal-header span { display: block; margin-top: 6px; color: #aab9cf; font-size: 14px; }
.modal-content { padding-top: 18px; }

.registration-layout { display: grid; grid-template-columns: 220px 1fr; gap: 24px; align-items: start; }
.registration-poster, .agenda-image { width: 100%; border-radius: 14px; border: 1px solid rgba(255,255,255,.12); }
.registration-form { display: grid; gap: 14px; }
.event-summary { display: grid; gap: 6px; padding: 13px 15px; border-radius: 12px; background: rgba(65, 189, 245, .08); color: #d7efff; line-height: 1.5; }
.event-summary span { color: #aebdd0; font-size: 13px; }
.registration-form label { display: grid; gap: 7px; color: #d6e2f2; font-size: 14px; font-weight: 650; }
.registration-form input, .registration-form select {
  width: 100%; min-height: 46px; border: 1px solid rgba(105, 213, 255, .24); border-radius: 11px;
  color: white; background: rgba(255,255,255,.055); padding: 0 13px; outline: none;
}
.registration-form small { color: #93a7c0; font-size: 12px; font-weight: 400; line-height: 1.45; }
.name-fields, .package-fields { display: grid; gap: 10px; border: 1px solid rgba(105, 213, 255, .2); border-radius: 12px; padding: 13px; }
.name-fields legend, .package-fields legend { padding: 0 5px; color: #d6e2f2; font-size: 14px; font-weight: 650; }
.name-fields p { margin: -2px 0 0; color: #93a7c0; font-size: 12px; line-height: 1.45; }
.name-fields > div { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.package-fields > label { display: flex; align-items: center; gap: 10px; padding: 10px; border: 1px solid rgba(105, 213, 255, .18); border-radius: 10px; cursor: pointer; }
.package-fields > label:has(input:checked) { border-color: #58d9ff; background: rgba(88,217,255,.09); }
.package-fields input { width: 18px; min-height: auto; height: 18px; margin: 0; padding: 0; }
.package-fields span { display: grid; gap: 3px; }
.package-fields strong { color: #fff1c2; font-size: 14px; }
.package-fields small { color: #9bb1c9; }
.registration-form input:focus, .registration-form select:focus { border-color: #58d9ff; box-shadow: 0 0 0 3px rgba(88,217,255,.13); }
.registration-form .consent { grid-template-columns: 18px 1fr; align-items: start; line-height: 1.5; font-size: 12px; color: #aebdd0; font-weight: 400; }
.registration-form .consent input { min-height: auto; height: 17px; padding: 0; margin: 1px 0 0; }
.primary-button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px; border: 0; border-radius: 12px;
  background: linear-gradient(135deg, #54ddff, #2f9fff); color: #021126; font-weight: 850; padding: 0 20px; cursor: pointer;
  box-shadow: 0 9px 28px rgba(26, 159, 255, .25); text-decoration: none;
}
.primary-button:disabled { opacity: .58; cursor: wait; }
.form-note { margin: 0; color: #879bb5; font-size: 12px; text-align: center; }
.success-card { padding: 22px; border: 1px solid rgba(74, 222, 128, .3); border-radius: 16px; background: rgba(34,197,94,.08); }
.success-card .success-mark { font-size: 38px; color: #6ee7a5; }
.success-card h2 { margin: 8px 0; }
.success-card p { color: #c7d6e8; line-height: 1.7; }
.success-card strong { color: white; }

.poster-link { display: block; width: min(100%, 600px); margin: 0 auto; }
.guest-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 15px; }
.guest-grid a { display: grid; gap: 6px; color: white; text-decoration: none; border: 1px solid rgba(99,210,255,.18); border-radius: 15px; background: rgba(255,255,255,.035); padding: 10px; }
.guest-grid img { width: 100%; aspect-ratio: 9/16; object-fit: cover; object-position: top; border-radius: 10px; }
.guest-grid strong { font-size: 16px; }
.guest-grid span { color: #74dff5; font-size: 12px; }

.info-card, .empty-card { padding: 14px 4px; text-align: center; }
.info-icon { font-size: 50px; color: #58d9ff; }
.info-card h2, .empty-card h2 { font-size: 25px; margin: 8px 0 12px; }
.info-card p, .empty-card p { line-height: 1.8; color: #e6eef8; }
.info-card .muted { color: #9db0c8; }
.link-button { margin-top: 10px; }
.empty-card span { color: #61dffa; font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }

.contact-list { display: grid; gap: 12px; }
.contact-list a, .contact-list button, .contact-list > div { display: grid; gap: 5px; padding: 16px; text-align: left; text-decoration: none; color: white; border: 1px solid rgba(88,217,255,.2); border-radius: 14px; background: rgba(255,255,255,.04); cursor: pointer; }
.contact-list > div:first-child { border-color: rgba(243,182,67,.34); background: rgba(243,182,67,.08); font-size: 18px; }
.contact-list strong { color: #f0bb51; }
.contact-list span { overflow-wrap: anywhere; }
.contact-list small { color: #7e94b1; }
.account-card { display: grid; gap: 10px; padding: 18px; border: 1px solid rgba(88,217,255,.22); border-radius: 15px; background: rgba(255,255,255,.04); }
.account-card dl { display: grid; grid-template-columns: 110px 1fr; gap: 10px; margin: 0; }
.account-card dt { color: #91a5bd; }
.account-card dd { margin: 0; overflow-wrap: anywhere; }

@media (max-width: 620px) {
  .modal { padding: 8px; align-items: end; }
  .modal-card { max-height: 95vh; padding: 20px 16px; border-radius: 20px 20px 12px 12px; }
  .registration-layout { grid-template-columns: 1fr; }
  .registration-poster { display: none; }
  .guest-grid { gap: 10px; }
  .guest-grid a { padding: 7px; }
  .name-fields > div { grid-template-columns: 1fr; }
  .account-card dl { grid-template-columns: 82px 1fr; font-size: 14px; }
}