:root {
  --ink: #172033;
  --paper: #f4f6f5;
  --surface: #ffffff;
  --muted: #667085;
  --line: #d9dee5;
  --coral: #d44b57;
  --coral-dark: #a93342;
  --jade: #16796f;
  --lemon: #f3c84b;
  --blue: #426ca8;
  --danger: #b42318;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100dvh;
  margin: 0;
  background: var(--ink);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
}

button,
input {
  font: inherit;
  letter-spacing: 0;
}

.invite-shell {
  display: grid;
  min-height: 100dvh;
  place-items: center;
  padding: 28px 16px;
}

.invite-panel {
  width: min(100%, 480px);
  padding: 28px 22px;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.24);
}

.bead-mark {
  display: flex;
  gap: 6px;
  margin-bottom: 30px;
}

.bead-mark i {
  display: block;
  width: 12px;
  height: 12px;
  background: var(--coral);
}

.bead-mark i:nth-child(2) { background: var(--lemon); }
.bead-mark i:nth-child(3) { background: var(--jade); }
.bead-mark i:nth-child(4) { background: var(--blue); }
.bead-mark i:nth-child(5) { background: var(--paper); border: 1px solid var(--line); }

.invite-kicker {
  margin: 0 0 8px;
  color: var(--coral-dark);
  font-size: 12px;
  font-weight: 800;
}

h1 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: 36px;
  line-height: 1.25;
  letter-spacing: 0;
}

.invite-question {
  margin: 18px 0 28px;
  color: var(--muted);
}

label {
  display: block;
  margin-bottom: 8px;
  color: #334158;
  font-size: 14px;
  font-weight: 750;
}

input {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border: 1px solid #bcc5cf;
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
}

input:focus-visible,
button:focus-visible {
  outline: 3px solid var(--lemon);
  outline-offset: 3px;
}

.invite-error {
  min-height: 26px;
  margin: 10px 0;
  color: var(--danger);
  font-size: 13px;
  font-weight: 700;
}

button {
  width: 100%;
  min-height: 50px;
  padding: 12px 18px;
  border: 0;
  border-radius: var(--radius);
  background: var(--coral);
  color: #ffffff;
  cursor: pointer;
  font-weight: 750;
  touch-action: manipulation;
}

button:hover {
  background: var(--coral-dark);
}

button:disabled {
  cursor: wait;
  opacity: 0.58;
}

.invite-footnote {
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

@media (min-width: 700px) {
  .invite-panel {
    padding: 42px;
  }

  h1 {
    font-size: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}