:root {
  --bg: #0b0d12;
  --fg: #f5f7fa;
  --muted: #8a93a6;
  --accent: #3ddc97;
  --alert: #e5243b;
  --alert-dark: #5c0a14;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: grid;
  place-items: center;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.3s;
}

[hidden] { display: none !important; }

.loading { color: var(--muted); font-size: 1.5rem; }

/* --- Pareamento --- */
.pairing {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  text-align: center;
}
.pairing-hint, .pairing-or { margin: 0; color: var(--muted); font-size: clamp(1rem, 2.5vw, 1.5rem); }
.pairing-or strong { color: var(--fg); font-weight: 600; }
.qr {
  width: min(45vh, 70vw);
  aspect-ratio: 1;
  background: #fff;
  border-radius: 1rem;
  padding: 0.75rem;
}
.pairing-code {
  margin: 0;
  font-size: clamp(3rem, 12vh, 8rem);
  font-weight: 800;
  letter-spacing: 0.3em;
  padding-left: 0.3em; /* compensa o letter-spacing para centralizar */
  font-variant-numeric: tabular-nums;
}

/* --- Cronômetro --- */
.timer {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}
.time {
  font-size: min(30vw, 70vh);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.status-label {
  min-height: 1.2em;
  font-size: clamp(1.5rem, 5vh, 3rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
}

.phase-idle .time { color: var(--muted); }

.phase-prep .time {
  font-size: min(60vw, 80vh);
  color: var(--accent);
}
.time.pop { animation: pop 0.9s ease-out; }
@keyframes pop {
  from { transform: scale(1.35); opacity: 0.2; }
  30% { opacity: 1; }
  to { transform: scale(1); }
}

/* Últimos 10 s: fundo piscando, sincronizado com a virada de cada segundo (classe .flash via JS). */
.phase-warning { background-color: var(--alert-dark); transition: none; }
.phase-warning.flash { background-color: var(--alert); }

/* 0:00: vermelho fixo. */
.phase-finished { background-color: var(--alert); }

.phase-warning.is-paused { background-color: var(--alert-dark); }
.is-paused .time { opacity: 0.5; }

/* --- Aviso de som --- */
.sound-banner {
  position: fixed;
  top: max(1rem, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1.2rem;
  border: 0;
  border-radius: 999px;
  background: #f5a524;
  color: #1a1206;
  font: inherit;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  animation: nudge 2s ease-in-out infinite;
}
.sound-banner svg { width: 1.4rem; height: 1.4rem; }
@keyframes nudge {
  50% { transform: translateX(-50%) scale(1.04); }
}

/* --- Rodapé --- */
.corner {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  display: flex;
  align-items: center;
  gap: 0.75rem;
  opacity: 0.6;
}
.conn {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--alert);
}
.conn.online { background: var(--accent); }
.session-code, .icon-btn {
  background: rgb(255 255 255 / 0.08);
  color: var(--fg);
  border: 0;
  border-radius: 0.5rem;
  padding: 0.4rem 0.7rem;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.15em;
  cursor: pointer;
}
/* --- Menu da sessão --- */
.session-menu {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: calc(max(1rem, env(safe-area-inset-bottom)) + 3rem);
  display: grid;
  gap: 0.4rem;
  min-width: 16rem;
  padding: 0.75rem;
  border-radius: 0.9rem;
  background: #1c212c;
  box-shadow: 0 10px 30px rgb(0 0 0 / 0.5);
}
.menu-status { margin: 0 0 0.3rem; color: var(--muted); font-size: 0.95rem; }
.menu-item {
  padding: 0.85rem 1rem;
  border: 0;
  border-radius: 0.6rem;
  background: rgb(255 255 255 / 0.08);
  color: var(--fg);
  font: inherit;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.menu-item:disabled { opacity: 0.35; cursor: default; }
.menu-item.muted { background: transparent; color: var(--muted); }
.icon-btn { display: grid; place-items: center; padding: 0.4rem; }
.icon-btn svg { width: 1.2rem; height: 1.2rem; }