*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0d0d1a;
  --surface: #161628;
  --surface2: #1e1e38;
  --accent: #7c4dff;
  --accent-light: #aa80ff;
  --success: #00e676;
  --danger: #ff4d6d;
  --warning: #ffb300;
  --text: #e8e8ff;
  --text-muted: #7a7a9d;
  --border: #2a2a4a;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ── Screens ── */
.screen {
  display: none;
  position: fixed;
  inset: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding: 2rem;
}

.screen.active {
  display: flex;
}

/* ── Toast ── */
.toast {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.65rem 1.4rem;
  font-size: 0.9rem;
  color: var(--text);
  z-index: 200;
  white-space: nowrap;
  animation: slideDown 0.25s ease;
}

.toast.hidden {
  display: none;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateX(-50%) translateY(-8px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── Buttons ── */
.btn {
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 2rem;
  transition: all 0.15s ease;
  letter-spacing: 0.03em;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(124, 77, 255, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.btn-large {
  font-size: 1.15rem;
  padding: 1rem 3rem;
  border-radius: 16px;
}

.btn-small {
  font-size: 0.82rem;
  padding: 0.45rem 1.1rem;
}

/* ── Home ── */
.home-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.logo {
  font-size: 4.5rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1;
}

.logo-snap { color: var(--accent-light); }
.logo-duel { color: var(--text); }

.tagline {
  color: var(--text-muted);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ── Waiting ── */
.waiting-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.spinner {
  width: 52px;
  height: 52px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.waiting-text {
  font-size: 1.1rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.waiting-countdown {
  font-size: 2rem;
  font-weight: 900;
  color: var(--text);
  letter-spacing: -0.02em;
  min-height: 2.4rem;
  transition: color 0.3s;
}

.waiting-countdown.urgent {
  color: var(--danger);
}

/* ── Battle ── */
#screen-battle {
  gap: 2.25rem;
  position: relative;
}

.scoreboard {
  display: flex;
  align-items: center;
  gap: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.25rem 2.5rem;
}

.score-side {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  min-width: 60px;
}

.score-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text-muted);
}

.score-value {
  font-size: 2.75rem;
  font-weight: 900;
  color: var(--text);
  line-height: 1;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.score-value.bump {
  transform: scale(1.35);
}

.score-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.score-vs {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--border);
}

.score-target {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.battle-status {
  font-size: 1rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  min-height: 1.4em;
  text-align: center;
}

/* ── Choice buttons ── */
.choices {
  display: flex;
  gap: 1.25rem;
}

.choice-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 20px;
  padding: 1.6rem 2.2rem;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--text);
  font-family: inherit;
}

.choice-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--surface2);
  transform: translateY(-5px);
  box-shadow: 0 10px 28px rgba(124, 77, 255, 0.35);
}

.choice-btn:active:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: none;
}

.choice-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.choice-btn.selected {
  border-color: var(--accent-light);
  background: var(--surface2);
  box-shadow: 0 0 0 3px rgba(124, 77, 255, 0.25);
}

.choice-emoji {
  font-size: 2.6rem;
  line-height: 1;
  display: block;
}

.choice-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ── Round overlay ── */
.round-overlay {
  position: fixed;
  inset: 0;
  background: rgba(13, 13, 26, 0.96);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  z-index: 50;
  animation: fadeIn 0.25s ease;
}

.round-overlay.hidden {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.reveal-row {
  display: flex;
  align-items: center;
  gap: 3.5rem;
}

.reveal-side {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.reveal-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text-muted);
}

.reveal-emoji {
  font-size: 5.5rem;
  line-height: 1;
  animation: popIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.reveal-vs {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--border);
  letter-spacing: 0.1em;
}

@keyframes popIn {
  from { transform: scale(0) rotate(-15deg); opacity: 0; }
  to   { transform: scale(1) rotate(0deg);  opacity: 1; }
}

.round-result-text {
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: 0.03em;
  text-align: center;
  animation: fadeUp 0.35s ease 0.2s both;
}

.round-scores {
  font-size: 0.9rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  animation: fadeUp 0.35s ease 0.3s both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Leave button anchored to bottom */
#btn-leave {
  position: absolute;
  bottom: 2rem;
}

/* ── Result Screen ── */
.result-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.result-banner {
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  animation: popIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.result-banner.win  { color: var(--success); }
.result-banner.lose { color: var(--danger); }

.result-score {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

/* ── Responsive ── */
@media (max-width: 480px) {
  .logo { font-size: 3rem; }

  .scoreboard { padding: 1rem 1.5rem; gap: 1.25rem; }
  .score-value { font-size: 2.25rem; }

  .choices { gap: 0.75rem; }
  .choice-btn { padding: 1.2rem 1.5rem; }
  .choice-emoji { font-size: 2.1rem; }

  .reveal-emoji { font-size: 4rem; }
  .reveal-row { gap: 2rem; }
  .round-result-text { font-size: 1.5rem; }
}