/* =========================================================
   猜数字 · 4位 1A2B  —  styles
   ========================================================= */

:root {
  --bg: #eef1f8;
  --ink: #14161f;
  --ink-2: #4a5064;
  --muted: #8b91a5;
  --line: rgba(20, 22, 31, 0.08);
  --line-strong: rgba(20, 22, 31, 0.14);
  --surface: #ffffff;
  --surface-2: #f6f7fb;
  --surface-3: #eef1f8;
  --primary: #4f46e5;
  --primary-2: #7c3aed;
  --primary-soft: rgba(79, 70, 229, 0.1);
  --a: #0ea472;
  --a-soft: rgba(14, 164, 114, 0.12);
  --b: #e08300;
  --b-soft: rgba(224, 131, 0, 0.12);
  --danger: #e0483c;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 24px 50px -30px rgba(24, 30, 62, 0.35);
  --shadow-soft: 0 10px 26px -20px rgba(24, 30, 62, 0.5);
  --mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(rgba(20, 22, 31, 0.045) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
  z-index: 0;
}

.bg-orbs {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.bg-orbs span {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
}
.bg-orbs span:nth-child(1) {
  width: 480px;
  height: 480px;
  top: -180px;
  left: -120px;
  background: radial-gradient(circle, #b9b6ff, transparent 70%);
}
.bg-orbs span:nth-child(2) {
  width: 420px;
  height: 420px;
  top: 40px;
  right: -140px;
  background: radial-gradient(circle, #a9e6dc, transparent 70%);
}
.bg-orbs span:nth-child(3) {
  width: 520px;
  height: 520px;
  bottom: -260px;
  left: 35%;
  background: radial-gradient(circle, #ffd9c2, transparent 70%);
}

/* ---------------- layout ---------------- */

.app {
  position: relative;
  z-index: 1;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 26px;
  background: rgba(238, 241, 248, 0.78);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 1px 0 rgba(20, 22, 31, 0.04);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
}

.logo {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  font: 700 20px/1 var(--mono);
  box-shadow: 0 8px 18px -8px rgba(79, 70, 229, 0.9);
}

.brand-text h1 {
  margin: 0;
  font-size: 17px;
  letter-spacing: 0.5px;
}
.brand-text p {
  margin: 2px 0 0;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 1.2px;
}

.tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-soft);
  margin-left: 6px;
}

.tab {
  border: 0;
  background: transparent;
  color: var(--ink-2);
  font: 600 13.5px/1 var(--font);
  padding: 9px 18px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s ease;
}
.tab:hover {
  color: var(--ink);
  background: rgba(79, 70, 229, 0.06);
}
.tab.is-active {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  box-shadow: 0 8px 18px -10px rgba(79, 70, 229, 0.9);
}

.top-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.online-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ink-2);
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.9);
}
.online-pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--a);
  box-shadow: 0 0 0 3px var(--a-soft);
}

.icon-btn {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink-2);
  font: 600 14px/1 var(--font);
  cursor: pointer;
  transition: all 0.16s ease;
}
.icon-btn:hover {
  background: #fff;
  color: var(--primary);
  transform: translateY(-1px);
}
.icon-btn.is-off {
  opacity: 0.45;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 336px;
  gap: 18px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 20px 26px 48px;
  align-items: start;
}

.main-col {
  min-width: 0;
}

.side-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 86px;
}

/* ---------------- panel ---------------- */

.panel {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}
.panel-head.tight {
  align-items: center;
  margin-bottom: 14px;
}
.panel-head h2 {
  margin: 0;
  font-size: 19px;
  letter-spacing: 0.2px;
}
.panel-head h3 {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.3px;
  color: var(--ink);
}
.panel-head .sub {
  margin: 6px 0 0;
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.6;
}

.hidden {
  display: none !important;
}

/* ---------------- meters ---------------- */

.meters {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}
.meter {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--line);
}
.meter .label {
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0.4px;
}
.meter strong {
  font: 700 20px/1.1 var(--mono);
  letter-spacing: 0.5px;
}

/* ---------------- guess input ---------------- */

.guess-box {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border-radius: 16px;
  background: linear-gradient(180deg, #fafbff, #f3f5fb);
  border: 1px solid var(--line);
}

.digits {
  display: flex;
  gap: 10px;
  flex: 1;
}

.digit {
  width: 100%;
  max-width: 62px;
  height: 66px;
  border-radius: 15px;
  border: 1.5px solid var(--line-strong);
  background: #fff;
  text-align: center;
  font: 700 26px/1 var(--mono);
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
  -moz-appearance: textfield;
}
.digit::-webkit-outer-spin-button,
.digit::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.digit:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft);
  transform: translateY(-1px);
}
.digit.filled {
  border-color: rgba(79, 70, 229, 0.4);
  background: #fdfdff;
}
.digits.shake {
  animation: shake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}
.digits.disabled .digit {
  opacity: 0.55;
}

@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-7px); }
  40%, 60% { transform: translateX(7px); }
}

/* ---------------- buttons ---------------- */

.btn {
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--ink);
  font: 600 14px/1 var(--font);
  padding: 12px 20px;
  border-radius: 13px;
  cursor: pointer;
  transition: all 0.16s ease;
  white-space: nowrap;
}
.btn:hover {
  border-color: rgba(79, 70, 229, 0.5);
  color: var(--primary);
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}
.btn.primary {
  border: 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  box-shadow: 0 12px 24px -14px rgba(79, 70, 229, 1);
  padding: 14px 22px;
}
.btn.primary:hover {
  color: #fff;
  filter: brightness(1.06);
}
.btn.ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink-2);
}
.btn.sm {
  padding: 8px 14px;
  font-size: 12.5px;
  border-radius: 10px;
}
.btn.block {
  display: block;
  width: 100%;
}

.link-btn {
  border: 0;
  background: none;
  color: var(--muted);
  font: 500 12px/1 var(--font);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
}
.link-btn:hover {
  color: var(--danger);
  background: rgba(224, 72, 60, 0.08);
}

.mini-btn {
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: 8px;
  padding: 5px 9px;
  font: 500 11.5px/1 var(--font);
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.15s ease;
}
.mini-btn:hover {
  color: var(--primary);
  border-color: rgba(79, 70, 229, 0.4);
}

.hint {
  margin: 10px 2px 0;
  font-size: 12px;
  color: var(--muted);
  min-height: 16px;
}
.hint.error {
  color: var(--danger);
}

/* ---------------- board / rows ---------------- */

.board {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 46vh;
  overflow-y: auto;
  padding-right: 4px;
}
.board::-webkit-scrollbar {
  width: 6px;
}
.board::-webkit-scrollbar-thumb {
  background: rgba(20, 22, 31, 0.14);
  border-radius: 99px;
}

.row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px solid transparent;
  animation: rowIn 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}
.row.win {
  background: linear-gradient(90deg, rgba(14, 164, 114, 0.12), rgba(14, 164, 114, 0.04));
  border-color: rgba(14, 164, 114, 0.35);
}

@keyframes rowIn {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.row-idx {
  width: 26px;
  font: 600 11.5px/1 var(--mono);
  color: var(--muted);
  text-align: right;
}

.row-digits {
  display: flex;
  gap: 6px;
}
.tile {
  width: 36px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--line);
  font: 700 19px/1 var(--mono);
  color: var(--ink);
}
.tile.hit {
  background: var(--a-soft);
  border-color: rgba(14, 164, 114, 0.4);
  color: var(--a);
}

.row-fb {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  font: 600 12px/1 var(--font);
  color: var(--muted);
}
.fb-a,
.fb-b {
  font-family: var(--mono);
  font-size: 13px;
}
.fb-a b {
  color: var(--a);
}
.fb-b b {
  color: var(--b);
}
.fb-perfect {
  color: var(--a);
  font-weight: 700;
}

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 40px 10px;
  color: var(--muted);
  text-align: center;
}
.empty-icon {
  font-size: 30px;
  margin-bottom: 6px;
  opacity: 0.8;
}
.empty p {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-2);
}
.empty span {
  font-size: 12px;
}

/* ---------------- online: lobby ---------------- */

.field {
  display: block;
  margin-bottom: 14px;
}
.field span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 7px;
  letter-spacing: 0.4px;
}

.field input,
#nickInput,
.code-input {
  width: 100%;
  height: 46px;
  border-radius: 12px;
  border: 1.5px solid var(--line-strong);
  background: #fff;
  padding: 0 14px;
  font: 500 14px/1 var(--font);
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field input:focus,
.code-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.code-input {
  font: 700 17px/1 var(--mono);
  letter-spacing: 3px;
  text-transform: uppercase;
}
.code-input::placeholder {
  font: 500 13px/1 var(--font);
  letter-spacing: 0;
  color: var(--muted);
  text-transform: none;
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0 14px;
  color: var(--muted);
  font-size: 11.5px;
}
.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.join-row {
  display: flex;
  gap: 10px;
}
.join-row .code-input {
  flex: 1;
}

.tips {
  margin: 20px 0 0;
  padding: 14px 16px 14px 32px;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px dashed var(--line-strong);
  color: var(--ink-2);
  font-size: 12.5px;
  line-height: 1.9;
}

.flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px dashed var(--line-strong);
}
.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 13px 12px;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px solid var(--line);
}
.flow-step i {
  flex: 0 0 22px;
  height: 22px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font: 700 11.5px/1 var(--mono);
  font-style: normal;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
}
.flow-step b {
  display: block;
  font-size: 12.5px;
  color: var(--ink);
  margin-bottom: 3px;
}
.flow-step span {
  font-size: 11.5px;
  color: var(--muted);
  line-height: 1.5;
  display: block;
}

.mini-note {
  margin: 14px 0 0;
  font-size: 11.5px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------------- online: room ---------------- */

.room-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 16px;
}
.eyebrow {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 1px;
}
.room-code {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 5px;
}
.room-code strong {
  font: 700 22px/1 var(--mono);
  letter-spacing: 5px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.players {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.player-card {
  position: relative;
  padding: 14px;
  border-radius: 16px;
  background: var(--surface-2);
  border: 1.5px solid var(--line);
  transition: all 0.2s ease;
}
.player-card.is-you {
  background: linear-gradient(180deg, rgba(79, 70, 229, 0.07), rgba(79, 70, 229, 0.02));
  border-color: rgba(79, 70, 229, 0.28);
}
.player-card.is-empty {
  border-style: dashed;
  background: transparent;
  display: grid;
  place-items: center;
  min-height: 92px;
  color: var(--muted);
  font-size: 12.5px;
  text-align: center;
}
.player-card.is-out {
  opacity: 0.6;
}

.player-top {
  display: flex;
  align-items: center;
  gap: 9px;
}
.avatar {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  font: 700 14px/1 var(--font);
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #a855f7);
}
.player-card:nth-child(2) .avatar {
  background: linear-gradient(135deg, #0ea5e9, #22d3ee);
}
.player-name {
  font-size: 13.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.player-name em {
  font-style: normal;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary);
}
.player-meta {
  margin-top: 9px;
  font-size: 11.5px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--a);
  display: inline-block;
}
.status-dot.off {
  background: var(--danger);
}
.status-dot.wait {
  background: var(--b);
}

.room-controls {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.room-controls .notice {
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.spinner {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(79, 70, 229, 0.25);
  border-top-color: var(--primary);
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------------- race ---------------- */

#raceArea {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  position: relative;
}

.race-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  margin-bottom: 14px;
}
.race-me,
.race-op {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.race-op {
  align-items: flex-end;
  text-align: right;
}
.race-bar .label {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.4px;
}
.race-bar strong {
  font: 700 16px/1.2 var(--mono);
}
.race-timer {
  font: 700 18px/1 var(--mono);
  color: var(--ink-2);
  min-width: 74px;
  text-align: center;
  letter-spacing: 1px;
}

.emote-row {
  display: flex;
  gap: 7px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.chip {
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--ink-2);
  font: 500 12px/1 var(--font);
  padding: 7px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.chip:hover {
  color: var(--primary);
  border-color: rgba(79, 70, 229, 0.45);
  transform: translateY(-1px);
}

.race-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(250, 251, 255, 0.82);
  backdrop-filter: blur(3px);
  border-radius: 14px;
  z-index: 5;
}
.race-overlay span {
  font: 800 68px/1 var(--mono);
  color: var(--primary);
  animation: countPop 1s ease-out;
}
@keyframes countPop {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }
  40% {
    transform: scale(1.05);
    opacity: 1;
  }
  100% {
    transform: scale(0.92);
    opacity: 0.9;
  }
}

/* ---------------- sidebar ---------------- */

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  border-radius: 12px;
  background: var(--surface-2);
  border: 1px solid var(--line);
}
.stat strong {
  font: 700 19px/1 var(--mono);
}
.stat span {
  font-size: 11px;
  color: var(--muted);
}

.count-badge {
  font: 600 11px/1 var(--mono);
  color: var(--ink-2);
  background: var(--surface-3);
  padding: 4px 8px;
  border-radius: 999px;
}

.records {
  display: flex;
  flex-direction: column;
  gap: 7px;
  max-height: 46vh;
  overflow-y: auto;
  padding-right: 2px;
}
.records::-webkit-scrollbar {
  width: 6px;
}
.records::-webkit-scrollbar-thumb {
  background: rgba(20, 22, 31, 0.14);
  border-radius: 99px;
}

.record {
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: all 0.15s ease;
}
.record:hover {
  border-color: rgba(79, 70, 229, 0.35);
  background: #fff;
}
.record-top {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
}
.record-mode {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}
.record-mode.online {
  background: rgba(14, 165, 233, 0.12);
  color: #0284c7;
}
.record-score {
  margin-left: auto;
  font: 600 11.5px/1 var(--mono);
  color: var(--ink-2);
}
.record-sub {
  margin-top: 5px;
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--muted);
}
.record-guesses {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--line-strong);
  display: none;
  flex-wrap: wrap;
  gap: 6px;
}
.record.open .record-guesses {
  display: flex;
}
.guess-pill {
  font: 600 11px/1 var(--mono);
  padding: 4px 6px;
  border-radius: 6px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink-2);
}
.guess-pill.win {
  background: var(--a-soft);
  border-color: rgba(14, 164, 114, 0.35);
  color: var(--a);
}

.records-empty {
  text-align: center;
  padding: 26px 0 10px;
  color: var(--muted);
}
.records-empty p {
  margin: 0 0 4px;
  font-size: 13px;
  color: var(--ink-2);
}
.records-empty span {
  font-size: 11.5px;
}

/* ---------------- modal ---------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(20, 22, 31, 0.35);
  backdrop-filter: blur(6px);
}
.modal.show {
  display: flex;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.modal-card {
  width: 100%;
  max-width: 480px;
  max-height: 86vh;
  overflow-y: auto;
  background: #fff;
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 40px 80px -40px rgba(20, 22, 31, 0.6);
  animation: modalIn 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.modal-head h3 {
  margin: 0;
  font-size: 17px;
}
.modal-body {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.85;
}
.modal-body p {
  margin: 0;
}
.modal-body .mt {
  margin-top: 14px;
}
.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

.rule-item {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  padding: 12px;
  border-radius: 13px;
  background: var(--surface-2);
}
.rule-item p {
  margin: 3px 0 0;
  font-size: 12px;
  color: var(--muted);
}
.tag {
  flex: 0 0 32px;
  height: 32px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font: 700 15px/1 var(--mono);
}
.tag.a {
  background: var(--a-soft);
  color: var(--a);
}
.tag.b {
  background: var(--b-soft);
  color: var(--b);
}

/* result */
.result-hero {
  text-align: center;
  padding: 8px 0 4px;
}
.secret-reveal span {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 2px;
}
.secret-digits {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 10px 0 14px;
}
.secret-digits .tile {
  width: 46px;
  height: 54px;
  font-size: 24px;
  border-radius: 12px;
  background: linear-gradient(180deg, #fff, #f4f5fb);
  animation: popIn 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) backwards;
}
@keyframes popIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.8);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.result-line {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}
.result-line .hl {
  color: var(--primary);
}
.result-detail {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.detail-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 14px;
  border-radius: 12px;
  background: var(--surface-2);
  font-size: 12.5px;
}
.detail-row.win {
  background: linear-gradient(90deg, rgba(14, 164, 114, 0.12), rgba(14, 164, 114, 0.03));
}
.detail-row b {
  font-family: var(--mono);
}

/* ---------------- toast ---------------- */

.toast-stack {
  position: fixed;
  top: 78px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  pointer-events: none;
}
.toast {
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(20, 22, 31, 0.88);
  color: #fff;
  font-size: 12.5px;
  box-shadow: 0 12px 30px -14px rgba(20, 22, 31, 0.8);
  animation: toastIn 0.26s cubic-bezier(0.22, 1, 0.36, 1);
  max-width: 78vw;
  text-align: center;
}
.toast.error {
  background: rgba(190, 48, 38, 0.94);
}
.toast.out {
  animation: toastOut 0.24s ease forwards;
}
@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.96);
  }
}
@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateY(-8px) scale(0.96);
  }
}

#confetti {
  position: fixed;
  inset: 0;
  z-index: 70;
  pointer-events: none;
  display: none;
}

/* ---------------- responsive ---------------- */

@media (min-width: 981px) {
  .board {
    min-height: 268px;
  }
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
    padding: 16px 16px 40px;
  }
  .side-col {
    position: static;
  }
  .board {
    max-height: none;
  }
  .records {
    max-height: 320px;
  }
  .flow {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 640px) {
  .topbar {
    padding: 10px 14px;
    gap: 10px;
    flex-wrap: wrap;
  }
  .brand-text p {
    display: none;
  }
  .tabs {
    order: 3;
    width: 100%;
    margin-left: 0;
  }
  .tab {
    flex: 1;
    text-align: center;
  }
  .online-pill {
    display: none;
  }
  .panel {
    padding: 16px;
    border-radius: 16px;
  }
  .guess-box {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .digit {
    height: 58px;
    max-width: none;
  }
  .board {
    max-height: none;
  }
  .row {
    padding: 8px 10px;
    gap: 8px;
  }
  .tile {
    width: 31px;
    height: 37px;
    font-size: 17px;
  }
  .players {
    grid-template-columns: 1fr;
  }
  .stat-grid {
    grid-template-columns: 1fr 1fr;
  }
  .race-timer {
    font-size: 16px;
  }
}