/* ============================================================
   DUEL — async 1v1 with rivals + ELO ladder
   Behavioral spine: loss aversion · rivalry · variable reward
   ============================================================ */

/* ── Lockscreen frame — wraps PhoneFrame contents for nudge state ── */
.du-lock {
  flex: 1;
  background: linear-gradient(180deg, #1a1d2e 0%, #2d3142 60%, #4e4068 100%);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.du-lock::after {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(255,255,255,0.4) 0 1.5px, transparent 2px),
    radial-gradient(circle at 78% 36%, rgba(255,255,255,0.3) 0 1px, transparent 2px),
    radial-gradient(circle at 35% 78%, rgba(244,216,222,0.35) 0 1.5px, transparent 2px),
    radial-gradient(circle at 92% 78%, rgba(214,168,95,0.35) 0 1.5px, transparent 2.5px);
}
.du-lock-time {
  position: relative; z-index: 1;
  padding-top: 64px;
  text-align: center;
  color: #fff;
}
.du-lock-time-num {
  font-family: var(--adv-display);
  font-size: 76px;
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1;
}
.du-lock-time-date {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.65);
  margin-top: 4px;
  letter-spacing: 0.04em;
}

.du-lock-notif {
  position: relative; z-index: 1;
  margin: auto 14px 22px;
  background: rgba(255,255,255,0.18);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.24);
  border-radius: 18px;
  padding: 14px;
  display: flex;
  align-items: start;
  gap: 12px;
}
.du-lock-notif-icon {
  width: 38px; height: 38px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--adv-coral-deep), var(--adv-rose));
  display: grid; place-items: center;
  flex-shrink: 0;
  color: #fff;
  font-family: var(--adv-display);
  font-weight: 800;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(196,113,101,0.4);
}
.du-lock-notif-body { flex: 1; min-width: 0; }
.du-lock-notif-h {
  display: flex; justify-content: space-between;
  font-size: 11px;
  color: rgba(255,255,255,0.7);
  font-weight: 600;
  margin-bottom: 2px;
}
.du-lock-notif-h strong { color: #fff; font-weight: 700; }
.du-lock-notif-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}
.du-lock-notif-title strong { color: var(--adv-gold); }
.du-lock-notif-foot {
  margin-top: 8px;
  display: flex;
  gap: 6px;
}
.du-lock-notif-btn {
  background: rgba(255,255,255,0.16);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 99px;
  padding: 5px 10px;
  font-size: 11px;
  font-weight: 700;
}
.du-lock-notif-btn.primary {
  background: #fff;
  color: var(--adv-ink);
  border-color: #fff;
}

/* ── Duel hub (phone) ── */
.du-hub {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--adv-bg);
  overflow-y: auto;
}
.du-hub-head {
  padding: 18px 22px 22px;
  background: linear-gradient(165deg, #2d1416 0%, #5a2b22 38%, #8a3f33 72%, #c47165 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.du-hub-head::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 15% 22%, rgba(255,255,255,0.4) 0 1.5px, transparent 2px),
    radial-gradient(circle at 80% 26%, rgba(244,216,222,0.45) 0 1.5px, transparent 2px),
    radial-gradient(circle at 30% 82%, rgba(214,168,95,0.4) 0 1.5px, transparent 2.5px),
    radial-gradient(circle at 88% 75%, rgba(255,255,255,0.35) 0 1px, transparent 2px);
  pointer-events: none;
}
.du-hub-head > * { position: relative; z-index: 1; }

.du-hub-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.du-hub-brand {
  font-family: var(--adv-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  display: flex; align-items: center; gap: 8px;
}
.du-hub-brand small {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.4px;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  font-family: var(--adv-body);
}
.du-hub-streak {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(214,168,95,0.2);
  border: 1px solid rgba(214,168,95,0.5);
  border-radius: 99px;
  padding: 5px 10px;
  font-size: 11.5px;
  font-weight: 800;
  color: var(--adv-gold);
}
.du-hub-streak svg { width: 12px; height: 12px; }

/* rank card */
.du-rank {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 14px;
  background: rgba(0,0,0,0.3);
  border: 1.5px solid rgba(214,168,95,0.4);
  border-radius: var(--adv-r);
  backdrop-filter: blur(6px);
}
.du-rank-badge {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--adv-gold) 0%, var(--adv-gold-deep) 100%);
  display: grid; place-items: center;
  color: #3d2700;
  flex-shrink: 0;
  box-shadow: 0 4px 0 rgba(0,0,0,0.3), inset 0 -3px 0 rgba(0,0,0,0.15);
  position: relative;
}
.du-rank-badge::before {
  content: '';
  position: absolute; inset: 4px;
  border: 1.5px solid rgba(255,255,255,0.4);
  border-radius: 50%;
}
.du-rank-badge svg { width: 26px; height: 26px; position: relative; z-index: 1; }
.du-rank-info { min-width: 0; }
.du-rank-tier {
  font-family: var(--adv-display);
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
  line-height: 1;
}
.du-rank-tier small {
  font-family: var(--adv-body);
  font-size: 11px;
  font-weight: 700;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.04em;
  margin-left: 6px;
}
.du-rank-progress {
  margin-top: 8px;
  height: 5px;
  background: rgba(255,255,255,0.12);
  border-radius: 99px;
  overflow: hidden;
}
.du-rank-progress > div {
  height: 100%;
  background: linear-gradient(90deg, var(--adv-gold-deep), var(--adv-gold), #fff);
  border-radius: 99px;
}
.du-rank-meta {
  font-size: 11px;
  font-weight: 700;
  color: rgba(255,255,255,0.65);
  margin-top: 6px;
  letter-spacing: 0.02em;
}
.du-rank-meta strong { color: #fff; }
.du-rank-num {
  font-family: var(--adv-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--adv-gold);
}

.du-hub-body {
  padding: 16px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* incoming duels */
.du-section-h {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.du-section-h h3 {
  font-family: var(--adv-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--adv-ink);
}
.du-section-h small {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--adv-muted);
}

.du-inbox {
  background: var(--adv-panel);
  border: 1.5px solid var(--adv-rule);
  border-radius: var(--adv-r);
  overflow: hidden;
}
.du-inbox-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--adv-rule-soft);
  position: relative;
}
.du-inbox-row:last-child { border-bottom: none; }
.du-inbox-row.fresh {
  background: linear-gradient(90deg, var(--adv-rose-soft) 0%, transparent 60%);
}
.du-inbox-row.fresh::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--adv-rose);
}
.du-inbox-from {
  font-size: 13px;
  font-weight: 700;
  color: var(--adv-ink);
  letter-spacing: -0.01em;
  line-height: 1.25;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.du-inbox-from small {
  font-size: 11px;
  font-weight: 600;
  color: var(--adv-muted);
  letter-spacing: 0.02em;
}
.du-inbox-from strong { color: var(--adv-coral-deep); }
.du-inbox-timer {
  font-family: var(--adv-mono);
  font-size: 11px;
  color: var(--adv-coral-deep);
  font-weight: 700;
  display: inline-flex; align-items: center; gap: 4px;
}
.du-inbox-cta {
  background: var(--adv-ink);
  color: #fff;
  font-family: var(--adv-display);
  font-weight: 800;
  font-size: 11px;
  padding: 7px 14px;
  border-radius: 99px;
  border: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
}
.du-inbox-cta.urgent { background: var(--adv-coral-deep); }

/* rivals carousel */
.du-rivals {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  margin: 0 -22px;
  padding: 0 22px 4px;
}
.du-rival {
  flex-shrink: 0;
  width: 130px;
  background: var(--adv-panel);
  border: 1.5px solid var(--adv-rule);
  border-radius: var(--adv-r);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  text-align: center;
}
.du-rival.live {
  border-color: var(--adv-coral);
  background: linear-gradient(180deg, var(--adv-coral-soft) 0%, var(--adv-panel) 100%);
}
.du-rival.live::before {
  content: '🔥';
  position: absolute;
  top: -8px; right: -8px;
  font-size: 18px;
  filter: drop-shadow(0 2px 4px rgba(196,100,107,0.4));
}
.du-rival-record {
  display: flex; justify-content: center; align-items: baseline; gap: 4px;
  font-family: var(--adv-display);
  font-size: 11px;
  font-weight: 800;
  color: var(--adv-muted);
}
.du-rival-record strong { color: var(--adv-ink); font-size: 13px; }
.du-rival-record .loss { color: var(--adv-red); }
.du-rival.live .du-rival-record .loss { color: var(--adv-coral-deep); }
.du-rival-name {
  font-family: var(--adv-display);
  font-size: 12.5px;
  font-weight: 800;
  color: var(--adv-ink);
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.du-rival-tier {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--adv-muted);
  letter-spacing: 0.02em;
}
.du-rival-cta {
  background: var(--adv-ink);
  color: #fff;
  font-family: var(--adv-display);
  font-weight: 800;
  font-size: 10px;
  padding: 6px 10px;
  border-radius: 99px;
  border: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: auto;
}
.du-rival.live .du-rival-cta {
  background: var(--adv-coral-deep);
}

/* main CTA */
.du-cta-big {
  background: linear-gradient(135deg, var(--adv-coral-deep) 0%, var(--adv-rose-deep) 100%);
  color: #fff;
  border: none;
  border-radius: var(--adv-r);
  padding: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--adv-display);
  font-weight: 800;
  font-size: 15px;
  box-shadow: 0 4px 0 #5a2b22;
  letter-spacing: 0.02em;
}
.du-cta-big-foot {
  font-size: 10.5px;
  font-weight: 700;
  color: rgba(255,255,255,0.75);
  margin-top: 2px;
  letter-spacing: 0.04em;
}

/* daily duel chips */
.du-daily-meter {
  display: flex;
  gap: 4px;
  background: var(--adv-bg-deeper);
  padding: 10px 14px;
  border-radius: var(--adv-r-sm);
  align-items: center;
  font-size: 12px;
  color: var(--adv-ink-soft);
  font-weight: 600;
}
.du-daily-meter strong { color: var(--adv-ink); }
.du-daily-pip {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--adv-gold);
  margin-right: 3px;
}
.du-daily-pip.used { background: var(--adv-rule); }

/* ── Challenge setup (phone) ── */
.du-setup {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--adv-bg);
}
.du-setup-h {
  padding: 16px 22px 18px;
  background: var(--adv-ink);
  color: #fff;
  position: relative;
}
.du-setup-back {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  font-weight: 600;
  margin-bottom: 6px;
}
.du-setup-h h2 {
  font-family: var(--adv-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
}
.du-setup-h-sub {
  font-size: 12.5px;
  color: rgba(255,255,255,0.65);
  margin-top: 4px;
}

.du-setup-body {
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
}
.du-setup-section h4 {
  font-family: var(--adv-display);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--adv-muted);
  margin-bottom: 10px;
}

.du-opp-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.du-opp {
  background: var(--adv-panel);
  border: 1.5px solid var(--adv-rule);
  border-radius: var(--adv-r-sm);
  padding: 8px 6px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  position: relative;
  cursor: pointer;
}
.du-opp.on {
  background: var(--adv-coral-soft);
  border-color: var(--adv-coral-deep);
  box-shadow: 0 0 0 2px var(--adv-coral-soft);
}
.du-opp.rival::before {
  content: '🔥';
  position: absolute;
  top: -6px; right: -4px;
  font-size: 12px;
}
.du-opp-name {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--adv-ink);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  width: 100%;
}
.du-opp-rank {
  font-family: var(--adv-mono);
  font-size: 9px;
  font-weight: 700;
  color: var(--adv-muted);
}

.du-topic-list {
  display: flex;
  flex-direction: column;
  border: 1.5px solid var(--adv-rule);
  border-radius: var(--adv-r-sm);
  overflow: hidden;
  background: var(--adv-panel);
}
.du-topic-row {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--adv-rule-soft);
  cursor: pointer;
}
.du-topic-row:last-child { border-bottom: none; }
.du-topic-row.on { background: var(--adv-rose-soft); }
.du-topic-radio {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 1.8px solid var(--adv-rule);
  background: #fff;
  position: relative;
}
.du-topic-row.on .du-topic-radio {
  border-color: var(--adv-rose-deep);
}
.du-topic-row.on .du-topic-radio::after {
  content: '';
  position: absolute;
  inset: 3.5px;
  border-radius: 50%;
  background: var(--adv-rose-deep);
}
.du-topic-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--adv-ink);
}
.du-topic-name small {
  display: block;
  font-size: 10.5px;
  color: var(--adv-muted);
  font-weight: 600;
  margin-top: 1px;
}
.du-topic-qs {
  font-size: 11px;
  color: var(--adv-muted);
  font-weight: 700;
  font-family: var(--adv-mono);
}

.du-stakes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.du-stake {
  background: var(--adv-bg-deeper);
  border: 2px solid transparent;
  border-radius: var(--adv-r-sm);
  padding: 12px 8px;
  text-align: center;
  cursor: pointer;
}
.du-stake.on {
  background: var(--adv-gold-soft);
  border-color: var(--adv-gold);
}
.du-stake-val {
  font-family: var(--adv-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--adv-ink);
  letter-spacing: -0.02em;
}
.du-stake-val small {
  font-family: var(--adv-body);
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-left: 3px;
  opacity: 0.55;
}
.du-stake-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--adv-muted);
  letter-spacing: 0.04em;
  margin-top: 2px;
}
.du-stake.on .du-stake-label { color: var(--adv-gold-deep); }

.du-bounty {
  background: var(--adv-gold-soft);
  border: 1.5px dashed var(--adv-gold);
  border-radius: var(--adv-r-sm);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11.5px;
  color: var(--adv-gold-deep);
  font-weight: 600;
  line-height: 1.4;
}
.du-bounty strong { font-family: var(--adv-display); }

.du-setup-foot {
  padding: 14px 22px 18px;
  background: var(--adv-panel);
  border-top: 1px solid var(--adv-rule);
  display: flex;
  gap: 10px;
  align-items: center;
}
.du-send-btn {
  flex: 1;
  background: var(--adv-coral-deep);
  color: #fff;
  border: none;
  font-family: var(--adv-display);
  font-weight: 800;
  font-size: 14px;
  padding: 14px;
  border-radius: var(--adv-r-sm);
  box-shadow: 0 3px 0 #5a2b22;
  display: flex; align-items: center; justify-content: center; gap: 6px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ── Mid-duel (phone) ── */
.du-q {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--adv-bg);
}
.du-q-vs {
  background: linear-gradient(180deg, #2d1416 0%, #5a2b22 100%);
  color: #fff;
  padding: 14px 18px 16px;
}
.du-q-vs-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
}
.du-q-vs-side {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.du-q-vs-side.right { flex-direction: row-reverse; text-align: right; }
.du-q-vs-info { min-width: 0; }
.du-q-vs-name {
  font-family: var(--adv-display);
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.du-q-vs-status {
  font-size: 10.5px;
  color: rgba(255,255,255,0.65);
  font-weight: 700;
  margin-top: 1px;
  letter-spacing: 0.02em;
}
.du-q-vs-status.locked { color: var(--adv-gold); }
.du-q-vs-status.waiting { color: rgba(255,255,255,0.5); }
.du-q-vs-mid {
  font-family: var(--adv-display);
  font-size: 14px;
  font-weight: 800;
  color: var(--adv-gold);
  letter-spacing: 0.16em;
}

.du-q-progress {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.du-q-progress-bar {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.15);
  border-radius: 99px;
  overflow: hidden;
}
.du-q-progress-bar > div {
  height: 100%;
  background: var(--adv-gold);
  border-radius: 99px;
}
.du-q-progress-text {
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 1.4px;
  color: rgba(255,255,255,0.7);
  text-transform: uppercase;
}
.du-q-progress-text strong { color: #fff; }

/* ── Result reveal (phone) ── */
.du-res {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--adv-bg);
  overflow-y: auto;
}
.du-res-head {
  padding: 26px 22px 22px;
  color: #fff;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.du-res-head.win {
  background: linear-gradient(165deg, #4a7a5b 0%, #6b9b7c 50%, #d6a85f 100%);
}
.du-res-head.loss {
  background: linear-gradient(165deg, #2d1416 0%, #5a2b22 60%, #8a3f33 100%);
}
.du-res-head::after {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(circle at 18% 28%, rgba(255,255,255,0.45) 0 1.5px, transparent 2px),
    radial-gradient(circle at 82% 36%, rgba(255,255,255,0.4) 0 1.5px, transparent 2px),
    radial-gradient(circle at 50% 80%, rgba(255,255,255,0.45) 0 1.5px, transparent 2px);
}
.du-res-head > * { position: relative; z-index: 1; }
.du-res-eyebrow {
  font-family: var(--adv-display);
  font-size: 11px;
  letter-spacing: 6px;
  font-weight: 800;
  color: rgba(255,255,255,0.7);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.du-res-title {
  font-family: var(--adv-display);
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.95;
  color: #fff;
  margin-bottom: 6px;
}
.du-res-title em {
  font-style: normal;
  color: var(--adv-gold);
}
.du-res-vs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 18px;
}
.du-res-score {
  font-family: var(--adv-display);
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
  line-height: 1;
}
.du-res-score.lost { color: rgba(255,255,255,0.45); }
.du-res-score-divider {
  font-family: var(--adv-display);
  font-size: 26px;
  font-weight: 700;
  color: rgba(255,255,255,0.4);
}

.du-res-coins {
  display: inline-flex;
  margin-top: 18px;
  padding: 8px 18px;
  background: rgba(0,0,0,0.3);
  border: 1.5px solid var(--adv-gold);
  border-radius: 99px;
  font-family: var(--adv-display);
  font-weight: 800;
  font-size: 15px;
  align-items: center;
  gap: 8px;
  color: var(--adv-gold);
}
.du-res-coins svg { width: 16px; height: 16px; }

.du-res-body {
  padding: 16px 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.du-res-card {
  background: var(--adv-panel);
  border: 1.5px solid var(--adv-rule);
  border-radius: var(--adv-r);
  padding: 14px;
}

/* ladder change */
.du-ladder-change {
  display: flex;
  align-items: center;
  gap: 14px;
}
.du-ladder-from, .du-ladder-to {
  flex: 1;
  text-align: center;
}
.du-ladder-num {
  font-family: var(--adv-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--adv-ink);
  letter-spacing: -0.02em;
}
.du-ladder-to .du-ladder-num { color: var(--adv-coral-deep); }
.du-ladder-label {
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 1.4px;
  color: var(--adv-muted);
  text-transform: uppercase;
  margin-top: 2px;
}
.du-ladder-arrow {
  font-size: 28px;
  color: var(--adv-coral-deep);
  font-family: var(--adv-display);
  font-weight: 800;
}
.du-ladder-arrow.down { color: var(--adv-red); transform: rotate(180deg); }

/* question-by-question replay */
.du-replay {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.du-replay-row {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 8px 4px;
  border-bottom: 1px solid var(--adv-rule-soft);
}
.du-replay-row:last-child { border-bottom: none; }
.du-replay-n {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--adv-bg-deeper);
  font-family: var(--adv-display);
  font-size: 11px;
  font-weight: 800;
  color: var(--adv-ink-soft);
  display: grid; place-items: center;
}
.du-replay-q {
  font-size: 12px;
  font-weight: 600;
  color: var(--adv-ink);
  line-height: 1.3;
}
.du-replay-time {
  font-family: var(--adv-mono);
  font-size: 10.5px;
  color: var(--adv-muted);
  font-weight: 700;
}
.du-replay-marks {
  display: flex; gap: 4px;
}
.du-replay-mark {
  width: 20px; height: 20px;
  border-radius: 5px;
  display: grid; place-items: center;
  font-size: 11px;
  font-weight: 800;
  color: #fff;
}
.du-replay-mark.right { background: var(--adv-green); }
.du-replay-mark.wrong { background: var(--adv-red); }

/* ── Ladder & rivals page ── */
.du-ladder {
  flex: 1;
  background: var(--adv-bg);
  overflow-y: auto;
}
.du-tier-banner {
  padding: 22px;
  background: linear-gradient(135deg, var(--adv-gold) 0%, var(--adv-gold-deep) 100%);
  color: #3d2700;
  position: relative;
  overflow: hidden;
}
.du-tier-banner::after {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(circle at 75% 30%, rgba(255,255,255,0.3) 0 2px, transparent 3px),
                    radial-gradient(circle at 25% 70%, rgba(255,255,255,0.25) 0 1.5px, transparent 2.5px);
}
.du-tier-banner > * { position: relative; z-index: 1; }
.du-tier-row {
  display: flex;
  align-items: center;
  gap: 14px;
}
.du-tier-shield {
  width: 60px; height: 60px;
  background: rgba(255,255,255,0.3);
  border-radius: 14px;
  display: grid; place-items: center;
  flex-shrink: 0;
}
.du-tier-shield svg { width: 30px; height: 30px; }
.du-tier-name {
  font-family: var(--adv-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
}
.du-tier-elo {
  font-family: var(--adv-mono);
  font-size: 13px;
  font-weight: 700;
  margin-top: 4px;
}
.du-tier-next {
  margin-top: 14px;
  padding: 10px 12px;
  background: rgba(0,0,0,0.15);
  border-radius: 10px;
  font-size: 11.5px;
  font-weight: 700;
}
.du-tier-next strong { font-family: var(--adv-display); }
.du-tier-next-bar {
  margin-top: 6px;
  height: 6px;
  background: rgba(0,0,0,0.2);
  border-radius: 99px;
  overflow: hidden;
}
.du-tier-next-bar > div {
  height: 100%;
  background: #3d2700;
  border-radius: 99px;
}

.du-tiers-strip {
  padding: 16px 22px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
}
.du-tier-pip {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  opacity: 0.4;
}
.du-tier-pip.cleared { opacity: 1; }
.du-tier-pip.current {
  opacity: 1;
  position: relative;
}
.du-tier-pip.current::after {
  content: '';
  position: absolute;
  bottom: -8px; left: 50%;
  transform: translateX(-50%);
  width: 6px; height: 6px;
  background: var(--adv-ink);
  border-radius: 50%;
}
.du-tier-pip-shield {
  width: 22px; height: 22px;
  border-radius: 6px;
  display: grid; place-items: center;
}
.du-tier-pip-shield.bronze { background: linear-gradient(180deg, #d49882, #9c5c4a); }
.du-tier-pip-shield.silver { background: linear-gradient(180deg, #d4d4dc, #8a8aa3); }
.du-tier-pip-shield.gold   { background: linear-gradient(180deg, #d6a85f, #a87f3f); }
.du-tier-pip-shield.plat   { background: linear-gradient(180deg, #b8e0e5, #5a8fa3); }
.du-tier-pip-shield.dia    { background: linear-gradient(180deg, #c9a3df, #6e4f96); }
.du-tier-pip-shield.master { background: linear-gradient(180deg, #f4a094, #c4615a); }
.du-tier-pip-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--adv-ink-soft);
}

.du-ladder-list {
  padding: 8px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.du-ladder-row {
  display: grid;
  grid-template-columns: auto auto 1fr auto auto;
  gap: 12px;
  align-items: center;
  padding: 10px 14px;
  background: var(--adv-panel);
  border: 1.5px solid var(--adv-rule);
  border-radius: var(--adv-r-sm);
}
.du-ladder-row.me {
  background: var(--adv-gold-soft);
  border-color: var(--adv-gold);
  box-shadow: 0 0 0 2px var(--adv-gold-soft);
}
.du-ladder-row.rival {
  border-color: var(--adv-coral);
}
.du-ladder-rank {
  font-family: var(--adv-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--adv-ink-soft);
  letter-spacing: -0.01em;
  min-width: 24px;
}
.du-ladder-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--adv-ink);
}
.du-ladder-name small {
  display: block;
  font-size: 11px;
  color: var(--adv-muted);
  font-weight: 600;
  margin-top: 1px;
}
.du-ladder-elo {
  font-family: var(--adv-mono);
  font-size: 12px;
  color: var(--adv-ink-soft);
  font-weight: 700;
}
.du-ladder-action {
  background: var(--adv-ink);
  color: #fff;
  font-family: var(--adv-display);
  font-weight: 800;
  font-size: 10px;
  padding: 5px 10px;
  border-radius: 99px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.du-ladder-row.me .du-ladder-action {
  background: var(--adv-gold-deep);
}
.du-ladder-row.rival .du-ladder-action {
  background: var(--adv-coral-deep);
}

/* ── Interactive game styles (appended below design-canvas styles) ── */

/* ── Page layout ── */
.du-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--adv-bg, #f9efe1);
}

.du-page-center {
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
}

.du-hub-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

/* ── Hub header ── */
.du-hub-head {
  padding: 18px 22px 16px;
  background: linear-gradient(165deg, #2d1416 0%, #5a2b22 38%, #8a3f33 72%, #c47165 100%);
  color: #fff;
}

.du-hub-title {
  font-family: var(--adv-display, Outfit, sans-serif);
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 12px;
}

.du-hub-title small {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  margin-left: 6px;
}

/* ── Subject tabs ── */
.du-subject-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.du-subject-tab {
  padding: 5px 12px;
  border-radius: 99px;
  border: 1.5px solid rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.8);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.du-subject-tab.active {
  background: #fff;
  color: #5a2b22;
  border-color: #fff;
}

/* ── ELO card ── */
.du-elo-card {
  background: #fff;
  border-radius: 14px;
  padding: 16px 20px;
  border: 2px solid #f5e4c3;
  text-align: center;
}

.du-elo-num {
  font-family: var(--adv-display, Outfit, sans-serif);
  font-size: 40px;
  font-weight: 800;
  color: #2d3142;
  line-height: 1;
}

.du-elo-label {
  font-size: 13px;
  font-weight: 600;
  color: #a87f3f;
  margin-top: 4px;
}

.du-elo-record {
  font-size: 12px;
  color: #8a8aa3;
  margin-top: 2px;
}

/* ── Actions ── */
.du-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.du-search-row {
  display: flex;
  gap: 8px;
}

.du-search-input {
  flex: 1;
  padding: 9px 13px;
  border-radius: 10px;
  border: 1.5px solid #e8d4ba;
  font-size: 13px;
  font-family: var(--adv-body, DM Sans, sans-serif);
  background: #fff;
  outline: none;
}

.du-search-input:focus { border-color: #c47b8a; }

.du-search-result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fff;
  border-radius: 10px;
  padding: 10px 14px;
  border: 1.5px solid #d8e9dc;
}

.du-search-codename {
  font-weight: 700;
  font-size: 14px;
  color: #2d3142;
}

.du-search-empty {
  font-size: 12px;
  color: #8a8aa3;
  padding: 6px 2px;
}

/* ── Sections ── */
.du-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.du-section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.07em;
  color: #8a8aa3;
  text-transform: uppercase;
  padding: 0 2px;
}

/* ── Inbox rows ── */
.du-inbox-row {
  background: #fff;
  border-radius: 12px;
  padding: 12px 14px;
  border: 1.5px solid #f4d8de;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.du-inbox-info { font-size: 13px; color: #2d3142; }
.du-inbox-subject { color: #8a8aa3; }
.du-inbox-expires { color: #a87f3f; font-size: 11px; }

.du-inbox-btns { display: flex; gap: 6px; }

/* ── Active duel rows ── */
.du-duel-row {
  background: #fff;
  border-radius: 12px;
  padding: 12px 14px;
  border: 1.5px solid #e8d4ba;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.du-duel-row.du-duel-my_turn  { border-color: #d8e9dc; }
.du-duel-row.du-duel-waiting  { border-color: #f5e4c3; }
.du-duel-row.du-duel-ready    { border-color: #c47b8a; }

.du-duel-info { font-size: 13px; color: #2d3142; flex: 1; }
.du-duel-subject { color: #8a8aa3; }

.du-duel-state-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 99px;
}

.du-duel-my_turn  .du-duel-state-badge { background: #d8e9dc; color: #3a6b4a; }
.du-duel-waiting  .du-duel-state-badge { background: #f5e4c3; color: #a87f3f; }
.du-duel-ready    .du-duel-state-badge { background: #f4d8de; color: #9c4a35; }

/* ── Buttons ── */
.du-btn-primary {
  background: #8a3f33;
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 700;
  font-family: var(--adv-display, Outfit, sans-serif);
  cursor: pointer;
  width: 100%;
  transition: background 0.15s;
}

.du-btn-primary:hover { background: #7a3529; }
.du-btn-primary:disabled { opacity: 0.5; cursor: default; }

.du-btn-ghost {
  background: transparent;
  color: #5b5d75;
  border: 1.5px solid #e8d4ba;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--adv-body, DM Sans, sans-serif);
  cursor: pointer;
  width: 100%;
  transition: border-color 0.15s;
}

.du-btn-ghost:hover { border-color: #c0b8a8; }

.du-btn-small {
  background: rgba(0,0,0,0.06);
  color: #2d3142;
  border: none;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.du-btn-small.primary {
  background: #8a3f33;
  color: #fff;
}

/* ── Nav header ── */
.du-nav-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: #fff;
  border-bottom: 1px solid #ede9f5;
}

.du-back-btn {
  background: none;
  border: none;
  font-size: 13px;
  font-weight: 600;
  color: #5b4878;
  cursor: pointer;
  padding: 0;
}

.du-nav-title {
  font-size: 15px;
  font-weight: 700;
  color: #2d3142;
}

/* ── Play head (inside playing screen) ── */
.du-play-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: #fff;
  border-bottom: 1px solid #ede9f5;
}

.du-play-opp {
  font-size: 13px;
  color: #8a8aa3;
  font-weight: 600;
}

/* ── Progress bar ── */
.du-progress-bar {
  height: 4px;
  background: #f0eee9;
}

.du-progress-fill {
  height: 100%;
  background: #8a3f33;
  transition: width 0.3s;
}

.du-play-qnum {
  padding: 8px 16px 0;
  font-size: 12px;
  color: #8a8aa3;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* ── Question + options ── */
.du-question-text {
  background: #fff;
  border-radius: 14px;
  padding: 18px;
  font-size: 15px;
  font-weight: 600;
  color: #2d3142;
  line-height: 1.5;
  border: 1.5px solid #ede9f5;
}

.du-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.du-option {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #fff;
  border: 1.5px solid #e8d4ba;
  border-radius: 12px;
  padding: 12px 14px;
  text-align: left;
  cursor: pointer;
  font-size: 14px;
  font-family: var(--adv-body, DM Sans, sans-serif);
  color: #2d3142;
  transition: border-color 0.15s, background 0.15s;
}

.du-option:hover { border-color: #c47b8a; background: #fff8f6; }

.du-option.correct { background: #d8e9dc; border-color: #3a6b4a; color: #2d4a36; }
.du-option.wrong   { background: #f4d8de; border-color: #9c4a35; color: #7a3040; }

.du-option-letter {
  width: 26px; height: 26px;
  border-radius: 7px;
  background: #f5e4c3;
  color: #a87f3f;
  font-weight: 800;
  font-size: 12px;
  display: grid; place-items: center;
  flex-shrink: 0;
  font-family: var(--adv-display, Outfit, sans-serif);
}

.du-option.correct .du-option-letter { background: #3a6b4a; color: #fff; }
.du-option.wrong   .du-option-letter { background: #9c4a35; color: #fff; }

.du-option-text { flex: 1; line-height: 1.4; }

/* ── Feedback ── */
.du-feedback {
  background: #fff;
  border-radius: 12px;
  padding: 14px 16px;
  border: 1.5px solid #ede9f5;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.du-feedback-correct { color: #3a6b4a; font-weight: 700; font-size: 14px; }
.du-feedback-wrong   { color: #9c4a35; font-weight: 700; font-size: 14px; }

.du-next-btn { width: 100%; }

/* ── Waiting + confirm card ── */
.du-waiting-card,
.du-confirm-card {
  background: #fff;
  border-radius: 18px;
  padding: 28px 24px;
  border: 2px solid #ede9f5;
  max-width: 360px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.du-waiting-icon  { font-size: 42px; }
.du-waiting-title { font-size: 18px; font-weight: 700; color: #2d3142; }
.du-waiting-score { font-size: 22px; font-weight: 800; color: #8a3f33; }
.du-waiting-sub   { font-size: 13px; color: #8a8aa3; }

.du-confirm-title  { font-size: 13px; font-weight: 700; color: #8a8aa3; letter-spacing: 0.07em; text-transform: uppercase; }
.du-confirm-name   { font-size: 24px; font-weight: 800; color: #2d3142; }
.du-confirm-detail { font-size: 13px; color: #5b5d75; }
.du-confirm-elo    { font-size: 13px; color: #a87f3f; font-weight: 600; }
.du-confirm-btns   { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }

/* ── Leaderboard ── */
.du-lb-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border-radius: 12px;
  padding: 11px 14px;
  border: 1.5px solid #e8d4ba;
  cursor: pointer;
  transition: border-color 0.15s;
}

.du-lb-row:hover { border-color: #c47b8a; }
.du-lb-me { border-color: #c47b8a !important; background: #fff8f6; }

.du-lb-rank  { font-size: 11px; font-weight: 700; color: #a87f3f; width: 28px; }
.du-lb-name  { font-size: 14px; font-weight: 700; color: #2d3142; flex: 1; }
.du-lb-elo   { font-size: 13px; font-weight: 700; color: #2d3142; }
.du-lb-record { font-size: 11px; color: #8a8aa3; margin-left: 4px; }
.du-lb-challenge-hint { font-size: 10px; color: #c47b8a; font-weight: 600; }

/* ── Results ── */
.du-result-card {
  background: #fff;
  border-radius: 18px;
  padding: 24px;
  border: 2px solid #e8d4ba;
  text-align: center;
}

.du-result-card.du-result-win  { border-color: #3a6b4a; }
.du-result-card.du-result-loss { border-color: #9c4a35; }
.du-result-card.du-result-draw { border-color: #a87f3f; }

.du-result-verdict {
  font-size: 22px;
  font-weight: 800;
  color: #2d3142;
  font-family: var(--adv-display, Outfit, sans-serif);
  margin-bottom: 12px;
}

.du-result-win  .du-result-verdict { color: #3a6b4a; }
.du-result-loss .du-result-verdict { color: #9c4a35; }
.du-result-draw .du-result-verdict { color: #a87f3f; }

.du-result-scores {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
}

.du-result-score-num   { font-size: 48px; font-weight: 800; line-height: 1; color: #2d3142; font-family: var(--adv-display, Outfit, sans-serif); }
.du-result-score-label { font-size: 12px; color: #8a8aa3; font-weight: 600; margin-top: 2px; }
.du-result-vs          { font-size: 18px; color: #8a8aa3; font-weight: 700; }

.du-elo-delta {
  font-size: 16px;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: 99px;
  display: inline-block;
}

.du-elo-delta.positive { background: #d8e9dc; color: #3a6b4a; }
.du-elo-delta.negative { background: #f4d8de; color: #9c4a35; }

/* ── Question breakdown ── */
.du-breakdown-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border-radius: 10px;
  padding: 10px 14px;
  border: 1.5px solid #e8d4ba;
  font-size: 13px;
}

.du-breakdown-row.correct { border-color: #3a6b4a; background: #f4faf5; }
.du-breakdown-row.wrong   { border-color: #9c4a35; background: #fff4f4; }

.du-breakdown-qnum   { font-weight: 700; color: #8a8aa3; width: 28px; }
.du-breakdown-result { font-weight: 800; font-size: 15px; }
.du-breakdown-row.correct .du-breakdown-result { color: #3a6b4a; }
.du-breakdown-row.wrong   .du-breakdown-result { color: #9c4a35; }
.du-breakdown-opp    { color: #8a8aa3; margin-left: auto; font-size: 12px; }

/* ── Misc ── */
.du-loading {
  text-align: center;
  padding: 32px;
  color: #8a8aa3;
  font-size: 14px;
}

.du-empty {
  text-align: center;
  padding: 24px;
  color: #8a8aa3;
  font-size: 13px;
  background: #fff;
  border-radius: 12px;
  border: 1.5px dashed #e8d4ba;
}

.du-msg {
  text-align: center;
  padding: 32px;
  font-size: 15px;
  color: #5b5d75;
}

.du-msg a {
  color: #8a3f33;
  font-weight: 700;
  text-decoration: none;
}