:root {
  color-scheme: dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07111f;
  color: #f4f7fb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #153252 0, #07111f 48%);
}

a { color: #9bd4ff; }

.shell {
  width: min(100% - 2rem, 34rem);
  margin: 0 auto;
  padding: 1.25rem 0 3rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  margin-bottom: 1rem;
  font-weight: 750;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: .7rem;
  background: #e9b949;
  color: #07111f;
}

.card {
  padding: 1.25rem;
  border: 1px solid #29445f;
  border-radius: 1rem;
  background: rgba(10, 28, 45, .96);
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, .28);
}

h1 { margin: 0 0 1rem; font-size: clamp(1.45rem, 6vw, 2rem); }
p { line-height: 1.5; }
form { margin: 0; }
label { display: block; margin: 0 0 .45rem; font-weight: 700; }

input {
  width: 100%;
  min-height: 3.2rem;
  margin-bottom: .9rem;
  padding: .7rem .85rem;
  border: 1px solid #496780;
  border-radius: .7rem;
  background: #06101b;
  color: inherit;
  font: inherit;
}

input:focus { outline: 3px solid rgba(78, 166, 232, .35); border-color: #76bdf1; }

button, .button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  min-height: 3rem;
  padding: .7rem 1rem;
  border: 0;
  border-radius: .7rem;
  background: #e9b949;
  color: #07111f;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
}

button.secondary, .button.secondary { background: #29445f; color: #f4f7fb; }
button.danger { background: #ef8c87; color: #2a0907; }
.link-button { width: auto; min-height: auto; padding: .25rem; background: transparent; color: #9bd4ff; }

.row { display: flex; align-items: center; gap: .75rem; }
.between { justify-content: space-between; }
.between h1 { margin-bottom: 0; }
.actions { display: grid; gap: .7rem; margin-top: 1rem; }
.centered { text-align: center; }
.muted { color: #aebfce; font-size: .92rem; }
.eyebrow { margin: 0; color: #aebfce; font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; }
.room-code { margin: .15rem 0; font-size: 2.3rem; font-weight: 850; letter-spacing: .12em; }
.code-input { text-align: center; font-size: 1.65rem; letter-spacing: .22em; font-variant-numeric: tabular-nums; }

.badge {
  display: inline-flex;
  padding: .35rem .6rem;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 800;
}
.badge.open { background: #185c44; color: #bdf5db; }
.badge.closed { background: #59383a; color: #ffd3d0; }
.connection-unknown { color: #ffd3d0; }

.notice { padding: .75rem; border-radius: .65rem; background: #203d55; }
.notice.error { background: #552d31; color: #ffd7d4; }
.notice.success { background: #174a39; color: #c8f6df; }
hr { margin: 1.25rem 0; border: 0; border-top: 1px solid #29445f; }

@media (min-width: 36rem) {
  .shell { padding-top: 2.5rem; }
  .card { padding: 1.75rem; }
  .actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}