/**
 * PK 竞技区 UI v2 — 大厅 / 对战 / 排行榜壳层
 */
.pk-arena {
  animation: fadeIn 0.35s ease;
  max-width: var(--xp-max, 1440px);
  margin: 0 auto;
}

.pk-arena-sub { padding-top: 4px; }

/* ----- Hero ----- */
.pk-hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px 28px;
  align-items: end;
  margin-bottom: 22px;
  padding: 22px 24px;
  border-radius: 16px;
  border: 1px solid var(--c-border-light);
  background:
    radial-gradient(ellipse 80% 120% at 100% 0%, rgba(129, 140, 248, 0.12), transparent 55%),
    radial-gradient(ellipse 60% 80% at 0% 100%, rgba(45, 212, 191, 0.1), transparent 50%),
    var(--c-surface);
  box-shadow: var(--shadow);
}

.pk-hero-kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-primary);
  font-family: var(--font-ui);
  margin-bottom: 6px;
}

.pk-hero-text h1 {
  margin: 0 0 6px;
  font-family: var(--font-display, var(--font));
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
}

.pk-hero-text p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--c-muted);
  line-height: 1.55;
}

.pk-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.pk-stat-card {
  min-width: 108px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--c-border-light);
  background: var(--c-surface-2);
  text-align: center;
}

.pk-stat-label {
  display: block;
  font-size: 0.68rem;
  color: var(--c-muted);
  font-family: var(--font-ui);
  margin-bottom: 4px;
}

.pk-stat-val {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.3;
}

.pk-stat-val.pk-stat-gold { color: var(--c-gold-light); }
.pk-stat-val.pk-stat-jade { color: var(--c-jade, var(--c-primary)); }

.pk-ws-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem !important;
  font-weight: 600;
}

.pk-ws-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-muted);
  flex-shrink: 0;
}

.pk-ws-dot.online {
  background: #34d399;
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.6);
}

.pk-ws-dot.connecting {
  background: #fbbf24;
  animation: pkWsPulse 1.2s ease infinite;
}

.pk-ws-dot.offline { background: #f87171; }

@keyframes pkWsPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* ----- Sections ----- */
.pk-section {
  margin-bottom: 20px;
}

.pk-section-title {
  margin: 0 0 14px;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: var(--font-ui);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pk-section-title::before {
  content: '';
  width: 4px;
  height: 14px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-primary), var(--c-purple));
}

/* ----- Mode cards ----- */
.pk-mode-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.pk-mode-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  min-height: 168px;
  padding: 18px 16px 14px;
  border: 1px solid var(--c-border-light);
  border-radius: 14px;
  background: var(--c-surface);
  cursor: pointer;
  text-align: left;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
  font: inherit;
  color: inherit;
  appearance: none;
}

.pk-mode-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}

.pk-mode-card.pk-accent-duel::before {
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.08), transparent 60%);
}

.pk-mode-card.pk-accent-match::before {
  background: linear-gradient(135deg, rgba(129, 140, 248, 0.1), transparent 60%);
}

.pk-mode-card.pk-accent-grand::before {
  background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), transparent 60%);
}

.pk-mode-card:hover {
  border-color: rgba(45, 212, 191, 0.45);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

.pk-mode-card:hover::before { opacity: 1; }

.pk-mode-card.active {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 1px var(--c-primary), 0 12px 32px rgba(45, 212, 191, 0.12);
  transform: translateY(-3px);
}

.pk-mode-card.active::before { opacity: 1; }

.pk-mode-card.matching {
  animation: pkModePulse 2s ease infinite;
}

@keyframes pkModePulse {
  0%, 100% { box-shadow: 0 0 0 1px var(--c-primary), 0 8px 24px rgba(45, 212, 191, 0.1); }
  50% { box-shadow: 0 0 0 2px var(--c-primary), 0 12px 36px rgba(45, 212, 191, 0.2); }
}

.pk-mode-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 8px;
}

.pk-mode-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.pk-mode-badge {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 20px;
  background: var(--c-gold-soft);
  color: var(--c-gold);
  font-family: var(--font-ui);
}

.pk-mode-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-text);
}

.pk-mode-desc {
  font-size: 0.8rem;
  color: var(--c-muted);
  line-height: 1.55;
  flex: 1;
}

.pk-mode-foot {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--c-border-light);
}

.pk-mode-status {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-primary);
  font-family: var(--font-ui);
}

.pk-mode-card.active .pk-mode-status { color: var(--c-gold-light); }

/* ----- Match progress ----- */
.pk-match-panel {
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid rgba(45, 212, 191, 0.25);
  background: var(--c-primary-soft);
}

.pk-match-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 10px;
  font-family: var(--font-ui);
}

.pk-progress-track {
  height: 10px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 5px;
  overflow: hidden;
}

html[data-theme="light"] .pk-progress-track {
  background: rgba(0, 0, 0, 0.06);
}

.pk-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--c-primary), var(--c-purple), var(--c-gold-light));
  background-size: 200% 100%;
  border-radius: 5px;
  transition: width 0.45s ease;
  width: 0;
  animation: pkProgressShine 2s linear infinite;
}

@keyframes pkProgressShine {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

/* ----- Score log ----- */
.pk-log-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pk-log-item {
  display: grid;
  grid-template-columns: 120px 72px 1fr;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--c-border-light);
  background: var(--c-surface);
  font-size: 0.84rem;
  font-family: var(--font-ui);
}

.pk-log-time { color: var(--c-muted); font-size: 0.78rem; }

.pk-log-delta {
  font-weight: 800;
  text-align: center;
}

.pk-log-delta.plus { color: #34d399; }
.pk-log-delta.minus { color: #f87171; }
.pk-log-delta.neutral { color: var(--c-muted); }

.pk-log-note {
  color: var(--c-text-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ----- Battle layout ----- */
.pk-battle-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid var(--c-border-light);
  background: var(--c-surface);
  position: sticky;
  top: calc(var(--xp-top, 56px) + var(--xp-sub, 44px) + 8px);
  z-index: 20;
  backdrop-filter: blur(12px);
}

.pk-battle-header .pk-battle-back { margin-right: auto; }

.pk-countdown-ring {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 8px 14px;
  border-radius: 12px;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-light);
  font-family: var(--font-ui);
  font-size: 0.88rem;
  color: var(--c-text-2);
}

.pk-countdown-ring strong {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--c-text);
  min-width: 2.5ch;
  text-align: center;
}

.pk-countdown-ring.urgent {
  border-color: rgba(248, 113, 113, 0.5);
  background: rgba(248, 113, 113, 0.08);
}

.pk-countdown-ring.urgent strong {
  color: #f87171;
  animation: pkBlink 1s infinite;
}

@keyframes pkBlink {
  50% { opacity: 0.45; }
}

.pk-battle-mode-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 20px;
  background: var(--c-gold-soft);
  color: var(--c-gold);
  font-family: var(--font-ui);
}

.pk-battle-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 16px;
  align-items: start;
}

.pk-players-strip {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 4px 2px 12px;
  margin-bottom: 4px;
  scrollbar-width: thin;
}

.pk-player-card {
  flex-shrink: 0;
  width: 88px;
  padding: 10px 8px;
  border-radius: 12px;
  border: 1px solid var(--c-border-light);
  background: var(--c-surface);
  text-align: center;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.pk-player-card.is-me {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.3);
}

.pk-player-card img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--c-border);
  margin-bottom: 6px;
}

.pk-player-card.is-me img {
  border-color: var(--c-primary);
}

.pk-player-name {
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: var(--font-ui);
}

.pk-player-status {
  font-size: 0.68rem;
  color: var(--c-muted);
  margin-top: 3px;
  font-family: var(--font-ui);
}

.pk-player-status.scored {
  color: var(--c-gold-light);
  font-weight: 700;
}

.pk-info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.pk-info-cell {
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-light);
}

.pk-info-cell.full { grid-column: 1 / -1; }

.pk-info-cell span {
  display: block;
  font-size: 0.68rem;
  color: var(--c-muted);
  font-family: var(--font-ui);
  margin-bottom: 4px;
}

.pk-info-cell strong {
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.5;
  display: block;
}

.pk-side-sticky {
  position: sticky;
  top: calc(var(--xp-top, 56px) + var(--xp-sub, 44px) + 72px);
}

.pk-exam-card .card-title {
  margin-bottom: 4px;
}

.pk-exam-hint {
  font-size: 0.78rem;
  color: var(--c-muted);
  margin: 0 0 14px;
  line-height: 1.5;
}

.pk-questions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}

.pk-question {
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--c-border-light);
  background: var(--c-surface-2);
  transition: border-color 0.15s, background 0.15s;
}

.pk-question:has(.pk-q-input:checked) {
  border-color: var(--c-primary);
  background: var(--c-primary-soft);
}

.pk-q-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  font-size: 0.9rem;
  line-height: 1.6;
}

.pk-q-check input {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  accent-color: var(--c-primary);
  flex-shrink: 0;
}

.pk-duanyu-input {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 10px 12px;
  border: 1px solid var(--c-border);
  border-radius: 10px;
  font-size: 0.88rem;
  font-family: var(--font-ui);
  background: var(--c-surface);
  color: var(--c-text);
}

.pk-duanyu-input:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px var(--c-primary-soft);
}

.pk-submit-wrap { padding-top: 4px; }

.pk-submit-wrap .btn { padding: 12px; font-size: 0.95rem; }

/* ----- Result ranking ----- */
.pk-rank-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.pk-rank-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--c-border-light);
  background: var(--c-surface-2);
}

.pk-rank-row.top1 { border-color: rgba(251, 191, 36, 0.4); background: var(--c-gold-soft); }
.pk-rank-row.top2 { border-color: rgba(192, 192, 192, 0.35); }
.pk-rank-row.top3 { border-color: rgba(205, 127, 50, 0.35); }

.pk-rank-no {
  width: 28px;
  font-weight: 800;
  font-size: 0.95rem;
  text-align: center;
  font-family: var(--font-ui);
}

.pk-rank-name { flex: 1; font-weight: 600; font-size: 0.9rem; }
.pk-rank-score { font-weight: 800; color: var(--c-gold-light); font-family: var(--font-ui); }
.pk-rank-tier { font-size: 0.75rem; color: var(--c-muted); }

.pk-empty-card {
  text-align: center;
  padding: 40px 24px;
}

/* ----- Arena tabs (排行榜) ----- */
.arena-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  padding: 4px;
  border-radius: 12px;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-light);
  overflow-x: auto;
}

.arena-tabs .tab {
  flex: 1;
  min-width: 64px;
  text-align: center;
  border: none;
  border-radius: 8px;
  margin: 0;
  padding: 10px 14px;
  background: transparent;
  cursor: pointer;
}

.arena-tabs .tab.active {
  background: var(--c-surface);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  border-bottom: none;
  color: var(--c-primary);
}

.pk-paipan-wrap {
  overflow-x: auto;
  margin-top: 4px;
}

.bd-tip {
  margin-bottom: 14px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.82rem;
  color: var(--c-muted);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-light);
  font-family: var(--font-ui);
}

@media (max-width: 960px) {
  .pk-hero {
    grid-template-columns: 1fr;
  }

  .pk-hero-stats {
    justify-content: flex-start;
  }

  .pk-mode-grid {
    grid-template-columns: 1fr;
  }

  .pk-battle-grid {
    grid-template-columns: 1fr;
  }

  .pk-side-sticky {
    position: static;
  }

  .pk-info-grid {
    grid-template-columns: 1fr;
  }

  .pk-log-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .pk-battle-header {
    position: static;
  }
}