:root {
  --bg0: #cfe3d6;
  --bg1: #e8f2ec;
  --ink: #1a2e24;
  --muted: #5a7164;
  --card: #f7fbf8;
  --line: #c5d8cc;
  --primary: #1f6b45;
  --primary-hover: #185537;
  --danger: #c45b6a;
  --danger-hover: #a94452;
  --shadow: 0 18px 40px rgba(26, 46, 36, 0.12);
  --radius: 18px;
  font-family: "Segoe UI", "PT Sans", "Helvetica Neue", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #f4fff8 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #b9d7c4 0%, transparent 45%),
    linear-gradient(160deg, var(--bg1), var(--bg0));
}

.shell {
  width: min(440px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3.5rem 0 3rem;
}

.brand {
  text-align: center;
  margin-bottom: 1.4rem;
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.8rem, 5vw, 2.25rem);
  letter-spacing: -0.02em;
  font-weight: 700;
}

.tagline {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.panel {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.35rem 1.35rem 1.5rem;
}

.field {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 0.9rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.field input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

.field input:focus {
  outline: 2px solid rgba(31, 107, 69, 0.28);
  border-color: var(--primary);
}

.btn {
  appearance: none;
  border: none;
  border-radius: 12px;
  padding: 0.8rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn.primary {
  width: 100%;
  background: var(--primary);
  color: #fff;
}

.btn.primary:hover {
  background: var(--primary-hover);
}

.btn.secondary {
  width: 100%;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn.secondary:hover {
  background: #f0f6f2;
}

.btn.ghost {
  background: #eef5f0;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 0.55rem 0.75rem;
  font-size: 0.85rem;
}

.btn.danger {
  background: var(--danger);
  color: #fff;
}

.btn.danger:hover {
  background: var(--danger-hover);
}

.divider {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.75rem;
  margin: 1.1rem 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.divider::before,
.divider::after {
  content: "";
  height: 1px;
  background: var(--line);
}

.room-code-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.2rem;
}

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

.room-code {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  margin-top: 0.2rem;
}

.copy-actions {
  display: grid;
  gap: 0.45rem;
}

.peers-title {
  margin: 0 0 0.6rem;
  font-size: 1rem;
}

.peers {
  list-style: none;
  margin: 0 0 1.2rem;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.peers li {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 0.65rem;
  border-radius: 12px;
  background: #eef5f0;
}

.avatar {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #cfe3d6;
  font-weight: 700;
  flex: 0 0 auto;
}

.peer-meta {
  min-width: 0;
}

.peer-name {
  font-weight: 600;
}

.peer-name .you {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.85rem;
}

.peer-state {
  color: var(--muted);
  font-size: 0.82rem;
}

.controls {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.65rem;
}

.status {
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.error {
  margin: 0.85rem 0 0;
  color: #b42318;
  font-size: 0.9rem;
}

@media (max-width: 420px) {
  .room-code-row {
    flex-direction: column;
  }

  .copy-actions {
    width: 100%;
  }
}