:root {
  --rk-bg: #050a12;
  --rk-surface: #0b1421;
  --rk-surface-2: #101d2c;
  --rk-line: rgba(160, 188, 218, 0.15);
  --rk-line-strong: rgba(160, 188, 218, 0.28);
  --rk-text: #f1f6fb;
  --rk-muted: #94a8bd;
  --rk-muted-2: #647b92;
  --rk-lime: #c8f542;
  --rk-cyan: #4fd1c5;
  --rk-amber: #ffbd59;
  --rk-red: #ff6b76;
  --rk-font-display: "Sora", "Segoe UI", system-ui, sans-serif;
  --rk-font-body: "Inter", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
.hidden { display: none !important; }

body.rk-body {
  min-width: 320px;
  background:
    linear-gradient(rgba(95, 126, 160, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(95, 126, 160, 0.035) 1px, transparent 1px),
    var(--rk-bg);
  background-size: 32px 32px;
  color: var(--rk-text);
  font-family: var(--rk-font-body);
}

button,
input { font: inherit; }

button { color: inherit; }

.rk-page {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding-bottom: 64px;
}

.rk-page .page-header { max-width: none; }

.rk-hero {
  position: relative;
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) auto;
  align-items: center;
  gap: 26px;
  min-height: 190px;
  margin-top: 22px;
  padding: 28px 30px;
  overflow: hidden;
  border: 1px solid rgba(200, 245, 66, 0.22);
  border-radius: 8px;
  background: #0a1421;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.22);
}

.rk-hero::after {
  content: "";
  position: absolute;
  inset: 0 0 0 auto;
  width: 31%;
  background:
    linear-gradient(rgba(79, 209, 197, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 209, 197, 0.08) 1px, transparent 1px);
  background-size: 18px 18px;
  mask-image: linear-gradient(90deg, transparent, #000);
  pointer-events: none;
}

.rk-hero-mark {
  position: relative;
  width: 112px;
  height: 112px;
}

.rk-hero-number {
  position: absolute;
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: #15273a;
  color: var(--rk-text);
  font-family: var(--rk-font-display);
  font-size: 22px;
  font-weight: 800;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.28);
}

.rk-hero-number.n1 {
  z-index: 3;
  left: 0;
  top: 32px;
  border-color: rgba(200, 245, 66, 0.55);
  color: var(--rk-lime);
  transform: rotate(-8deg);
}

.rk-hero-number.n2 {
  z-index: 2;
  left: 34px;
  top: 4px;
  color: var(--rk-cyan);
  transform: rotate(4deg);
}

.rk-hero-number.n3 {
  right: 0;
  bottom: 6px;
  color: var(--rk-amber);
  transform: rotate(9deg);
}

.rk-hero-mark i {
  position: absolute;
  left: 24px;
  bottom: 6px;
  width: 70px;
  height: 1px;
  background: rgba(200, 245, 66, 0.24);
}

.rk-hero-mark i:last-child {
  bottom: 0;
  width: 44px;
}

.rk-hero-copy {
  position: relative;
  z-index: 1;
}

.rk-hero h1 {
  margin: 4px 0 8px;
  font-family: var(--rk-font-display);
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1;
  letter-spacing: 0;
}

.rk-hero-copy > p {
  max-width: 650px;
  margin: 0 0 14px;
  color: var(--rk-muted);
  font-size: 14px;
}

.rk-auth-pill {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 164px;
  padding: 10px 12px;
  border: 1px solid var(--rk-line);
  border-radius: 8px;
  background: rgba(5, 10, 18, 0.72);
  color: var(--rk-muted);
  font-size: 12px;
  font-weight: 700;
}

.rk-auth-pill.is-guest { color: var(--rk-amber); }

.rk-auth-dot {
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  background: var(--rk-cyan);
  box-shadow: 0 0 12px rgba(79, 209, 197, 0.7);
}

.rk-auth-pill.is-guest .rk-auth-dot {
  background: var(--rk-amber);
  box-shadow: none;
}

.rk-section,
.rk-game-section {
  margin-top: 18px;
  border: 1px solid var(--rk-line);
  border-radius: 8px;
  background: rgba(9, 18, 30, 0.94);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.18);
}

.rk-section { padding: 26px; }

.rk-section-heading,
.rk-room-head,
.rk-panel-head,
.rk-game-top,
.rk-next-row,
.rk-room-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.rk-section-heading h2,
.rk-room-head h2,
.rk-panel-head h2 {
  margin: 3px 0 0;
  font-family: var(--rk-font-display);
  font-size: 20px;
  letter-spacing: 0;
}

.rk-eyebrow {
  display: block;
  color: var(--rk-lime);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.6px;
  text-transform: uppercase;
}

.rk-mode-tabs,
.rk-segmented {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--rk-line);
  border-radius: 8px;
  background: #07101b;
}

.rk-mode-tabs button,
.rk-segmented button {
  min-height: 34px;
  padding: 0 15px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--rk-muted);
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
}

.rk-mode-tabs button.active,
.rk-segmented button.active {
  background: #19324b;
  color: var(--rk-text);
  box-shadow: inset 0 -2px var(--rk-lime);
}

.rk-category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 24px;
}

.rk-category-card {
  --cat-accent: var(--rk-lime);
  position: relative;
  min-height: 116px;
  padding: 16px;
  overflow: hidden;
  border: 1px solid var(--rk-line);
  border-radius: 8px;
  background: #0d1927;
  text-align: left;
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.rk-category-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 3px;
  background: var(--cat-accent);
  opacity: 0;
}

.rk-category-card:hover {
  border-color: color-mix(in srgb, var(--cat-accent) 55%, transparent);
  background: #112033;
  transform: translateY(-2px);
}

.rk-category-card.active {
  border-color: color-mix(in srgb, var(--cat-accent) 72%, transparent);
  background: #132337;
}

.rk-category-card.active::after { opacity: 1; }

.rk-category-card .rk-cat-icon {
  display: block;
  min-height: 34px;
  font-size: 28px;
}

.rk-category-card strong {
  display: block;
  margin-top: 5px;
  color: var(--rk-text);
  font-size: 13px;
}

.rk-category-card small {
  display: block;
  margin-top: 2px;
  color: var(--rk-muted-2);
  font-size: 11px;
}

.rk-category-card .rk-stable {
  position: absolute;
  top: 9px;
  right: 9px;
  padding: 3px 6px;
  border: 1px solid rgba(79, 209, 197, 0.28);
  border-radius: 4px;
  color: var(--rk-cyan);
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.rk-settings-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid var(--rk-line);
  border-radius: 8px;
  background: var(--rk-line);
}

.rk-setting {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  background: #0b1624;
}

.rk-setting > span {
  color: var(--rk-muted);
  font-size: 11px;
  font-weight: 700;
}

.rk-action-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 18px;
  padding: 16px 18px;
  border: 1px solid rgba(200, 245, 66, 0.2);
  border-radius: 8px;
  background: #101d28;
}

.rk-action-band strong,
.rk-online-column strong {
  display: block;
  font-size: 13px;
}

.rk-action-band span,
.rk-online-column small {
  display: block;
  margin-top: 2px;
  color: var(--rk-muted);
  font-size: 11px;
}

.rk-primary,
.rk-quiet,
.rk-online-column button,
.rk-join-row button,
.rk-icon-command,
.rk-text-command {
  min-height: 42px;
  border-radius: 7px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
}

.rk-primary {
  padding: 0 20px;
  border: 1px solid var(--rk-lime);
  background: var(--rk-lime);
  color: #102000;
  box-shadow: 0 8px 22px rgba(200, 245, 66, 0.14);
}

.rk-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  background: #d5ff57;
}

.rk-primary:disabled {
  border-color: var(--rk-line);
  background: #1a2938;
  color: var(--rk-muted-2);
  box-shadow: none;
  cursor: not-allowed;
}

.rk-quiet {
  padding: 0 16px;
  border: 1px solid var(--rk-line-strong);
  background: transparent;
  color: var(--rk-muted);
}

.rk-quiet:hover {
  border-color: rgba(200, 245, 66, 0.36);
  color: var(--rk-text);
}

.rk-online-band {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid var(--rk-line);
  border-radius: 8px;
  background: var(--rk-line);
}

.rk-online-column {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-height: 126px;
  padding: 18px;
  background: #0b1624;
}

.rk-online-column > button,
.rk-online-column > .rk-join-row {
  grid-column: 1 / -1;
}

.rk-step {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(79, 209, 197, 0.35);
  border-radius: 7px;
  color: var(--rk-cyan);
  font-family: var(--rk-font-display);
  font-size: 12px;
  font-weight: 800;
}

.rk-online-column > button,
.rk-join-row button {
  border: 1px solid var(--rk-line-strong);
  background: #162b41;
  color: var(--rk-text);
}

.rk-online-column > button:hover,
.rk-join-row button:hover {
  border-color: var(--rk-cyan);
  background: #193650;
}

.rk-join-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 96px;
  gap: 8px;
}

.rk-join-row input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--rk-line-strong);
  border-radius: 7px;
  outline: 0;
  background: #07101b;
  color: var(--rk-text);
  font-family: var(--rk-font-display);
  font-weight: 800;
  letter-spacing: 4px;
  text-align: center;
  text-transform: uppercase;
}

.rk-join-row input:focus { border-color: var(--rk-cyan); }

.rk-online-note {
  grid-column: 1 / -1;
  margin: 0;
  padding: 10px 14px;
  background: #09121e;
  color: var(--rk-muted);
  font-size: 11px;
  text-align: center;
}

.rk-online-note.is-error { color: var(--rk-red); }

.rk-code-line {
  display: flex;
  align-items: center;
  gap: 10px;
}

.rk-room-head h2 {
  margin-top: 2px;
  color: var(--rk-lime);
  font-size: 34px;
  letter-spacing: 5px;
}

.rk-room-head p {
  margin: 2px 0 0;
  color: var(--rk-muted);
  font-size: 12px;
}

.rk-icon-command {
  width: 38px;
  min-height: 38px;
  padding: 0;
  border: 1px solid var(--rk-line);
  background: #102033;
  color: var(--rk-muted);
  font-size: 18px;
}

.rk-player-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 22px;
}

.rk-player {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 62px;
  padding: 10px 12px;
  border: 1px solid var(--rk-line);
  border-radius: 8px;
  background: #0d1927;
}

.rk-player-avatar {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 7px;
  background: #193149;
  color: var(--rk-cyan);
  font-family: var(--rk-font-display);
  font-size: 13px;
  font-weight: 800;
}

.rk-player strong,
.rk-player small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rk-player strong { display: block; font-size: 12px; }
.rk-player small { display: block; color: var(--rk-muted-2); font-size: 10px; }
.rk-player em { color: var(--rk-lime); font-size: 9px; font-style: normal; font-weight: 800; text-transform: uppercase; }

.rk-room-footer {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--rk-line);
}

.rk-room-footer > span { color: var(--rk-muted); font-size: 12px; }

.rk-game-section { overflow: hidden; }

.rk-game-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px 110px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--rk-line);
  background: #0b1624;
}

.rk-round-copy > span,
.rk-total-score span,
.rk-timer span {
  display: block;
  color: var(--rk-muted-2);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.rk-round-copy strong {
  display: block;
  margin-top: 2px;
  font-family: var(--rk-font-display);
  font-size: 17px;
}

.rk-round-copy small {
  display: block;
  margin-top: 2px;
  color: var(--rk-muted);
  font-size: 11px;
}

.rk-timer { text-align: center; }
.rk-timer strong { font-family: var(--rk-font-display); font-size: 26px; font-variant-numeric: tabular-nums; }
.rk-timer.is-low strong { color: var(--rk-red); }

.rk-timer i {
  display: block;
  height: 4px;
  margin-top: 6px;
  overflow: hidden;
  border-radius: 4px;
  background: #1b2b3c;
}

.rk-timer b {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: var(--rk-lime);
  transform-origin: left;
}

.rk-timer.is-low b { background: var(--rk-red); }

.rk-total-score {
  padding-left: 18px;
  border-left: 1px solid var(--rk-line);
  text-align: right;
}

.rk-total-score strong {
  display: block;
  margin-top: 2px;
  color: var(--rk-lime);
  font-family: var(--rk-font-display);
  font-size: 24px;
}

.rk-live-scores {
  display: flex;
  gap: 6px;
  padding: 9px 20px;
  overflow-x: auto;
  border-bottom: 1px solid var(--rk-line);
  background: #08111d;
}

.rk-live-score {
  flex: none;
  padding: 5px 9px;
  border: 1px solid var(--rk-line);
  border-radius: 6px;
  color: var(--rk-muted);
  font-size: 10px;
  font-weight: 700;
}

.rk-live-score.done {
  border-color: rgba(79, 209, 197, 0.32);
  color: var(--rk-cyan);
}

.rk-board {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  min-height: 520px;
}

.rk-ranking-panel,
.rk-pool-panel { padding: 22px; }
.rk-ranking-panel { border-right: 1px solid var(--rk-line); }
.rk-pool-panel { background: rgba(5, 12, 20, 0.42); }

.rk-panel-head h2 { font-size: 16px; }
.rk-panel-head > span { color: var(--rk-muted-2); font-size: 11px; }

.rk-text-command {
  min-height: 32px;
  padding: 0 9px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--rk-muted);
  font-size: 11px;
}

.rk-text-command:hover { border-color: var(--rk-line); color: var(--rk-text); }

.rk-ranking-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 390px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: rank;
}

.rk-rank-slot,
.rk-rank-placeholder {
  min-height: 56px;
  border-radius: 7px;
}

.rk-rank-placeholder {
  display: flex;
  align-items: center;
  padding: 0 14px;
  border: 1px dashed rgba(160, 188, 218, 0.15);
  color: #40566c;
  font-size: 11px;
}

.rk-rank-slot {
  display: grid;
  grid-template-columns: 32px 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  padding: 7px 8px;
  border: 1px solid var(--rk-line);
  background: #102033;
  counter-increment: rank;
}

.rk-rank-slot::before {
  content: counter(rank);
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: #1b344e;
  color: var(--rk-lime);
  font-family: var(--rk-font-display);
  font-size: 11px;
  font-weight: 800;
}

.rk-item-symbol,
.rk-pool-symbol {
  display: grid;
  place-items: center;
  font-size: 23px;
}

.rk-item-symbol.is-text,
.rk-pool-symbol.is-text {
  font-family: var(--rk-font-display);
  font-size: 13px;
  font-weight: 800;
}

.rk-rank-slot strong {
  overflow: hidden;
  color: var(--rk-text);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rk-rank-controls { display: inline-flex; gap: 3px; }

.rk-rank-controls button {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--rk-line);
  border-radius: 5px;
  background: #0a1725;
  color: var(--rk-muted);
  cursor: pointer;
}

.rk-rank-controls button:hover:not(:disabled) { border-color: var(--rk-cyan); color: var(--rk-text); }
.rk-rank-controls button:disabled { opacity: 0.28; cursor: default; }
.rk-rank-controls button[data-remove] { color: #ff8e96; }

.rk-item-pool {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  min-height: 260px;
  margin-top: 16px;
  align-content: start;
}

.rk-pool-item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 8px;
  min-height: 58px;
  padding: 8px 10px;
  border: 1px solid var(--rk-line);
  border-radius: 7px;
  background: #0e1b2a;
  cursor: pointer;
  text-align: left;
}

.rk-pool-item:hover {
  border-color: rgba(79, 209, 197, 0.5);
  background: #13263a;
}

.rk-pool-item strong {
  overflow: hidden;
  font-size: 11px;
  line-height: 1.25;
  text-overflow: ellipsis;
}

.rk-pool-item span:last-child {
  color: var(--rk-cyan);
  font-size: 18px;
  text-align: right;
}

.rk-empty-pool {
  grid-column: 1 / -1;
  display: grid;
  place-items: center;
  min-height: 150px;
  border: 1px dashed var(--rk-line);
  border-radius: 7px;
  color: var(--rk-muted-2);
  font-size: 12px;
}

.rk-submit {
  width: 100%;
  margin-top: 16px;
}

.rk-submit-note {
  min-height: 18px;
  margin: 7px 0 0;
  color: var(--rk-muted-2);
  font-size: 10px;
  text-align: center;
}

.rk-result-summary {
  display: grid;
  grid-template-columns: 1.25fr repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--rk-line);
  border-radius: 8px;
  background: var(--rk-line);
}

.rk-result-score,
.rk-metric {
  min-height: 92px;
  padding: 16px;
  background: #0b1624;
}

.rk-result-score span,
.rk-metric span {
  display: block;
  color: var(--rk-muted-2);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.rk-result-score strong,
.rk-metric strong {
  display: block;
  margin-top: 6px;
  font-family: var(--rk-font-display);
  font-size: 24px;
}

.rk-result-score strong { color: var(--rk-lime); font-size: 34px; }

.rk-result-layout {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

.rk-compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.rk-compare-column {
  min-width: 0;
}

.rk-answer-list,
.rk-standings {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}

.rk-answer-row,
.rk-standing-row {
  display: grid;
  align-items: center;
  min-height: 48px;
  padding: 7px 10px;
  border: 1px solid var(--rk-line);
  border-radius: 7px;
  background: #0d1927;
}

.rk-answer-row {
  grid-template-columns: 28px 32px minmax(0, 1fr) auto;
  gap: 8px;
}

.rk-answer-row > b,
.rk-standing-row > b {
  color: var(--rk-muted-2);
  font-family: var(--rk-font-display);
  font-size: 11px;
  text-align: center;
}

.rk-answer-row strong { font-size: 11px; }
.rk-answer-row em { color: var(--rk-cyan); font-size: 10px; font-style: normal; font-weight: 800; }

.rk-user-answer-row {
  border-width: 1px;
  transition: border-color 160ms ease, background 160ms ease;
}

.rk-user-answer-row.is-correct {
  border-color: rgba(84, 222, 137, 0.48);
  background: rgba(30, 105, 68, 0.23);
}

.rk-user-answer-row.is-correct > b,
.rk-user-answer-row.is-correct em {
  color: #72e6a0;
}

.rk-user-answer-row.is-wrong {
  border-color: rgba(255, 107, 118, 0.48);
  background: rgba(117, 35, 49, 0.23);
}

.rk-user-answer-row.is-wrong > b,
.rk-user-answer-row.is-wrong em {
  color: #ff8993;
}

#rk-round-standings-wrap {
  padding-top: 18px;
  border-top: 1px solid var(--rk-line);
}

.rk-standing-row {
  grid-template-columns: 28px minmax(0, 1fr) auto;
  gap: 9px;
}

.rk-standing-row:first-child {
  border-color: rgba(200, 245, 66, 0.34);
  background: #14231f;
}

.rk-standing-row strong { overflow: hidden; font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.rk-standing-row span { color: var(--rk-lime); font-family: var(--rk-font-display); font-size: 12px; font-weight: 800; }

.rk-next-row {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--rk-line);
}

.rk-next-row > span { color: var(--rk-muted); font-size: 11px; }

.rk-final-section { text-align: center; }
.rk-finish-mark { font-size: 46px; }
.rk-final-section h2 { margin: 7px 0 5px; font-family: var(--rk-font-display); font-size: 26px; }
.rk-final-section > p { margin: 0; color: var(--rk-muted); font-size: 12px; }
.rk-final-standings { width: min(540px, 100%); margin: 22px auto 0; text-align: left; }
.rk-final-actions { display: flex; justify-content: center; gap: 8px; margin-top: 22px; }

.rk-toast {
  position: fixed;
  z-index: 20;
  left: 50%;
  bottom: 22px;
  max-width: min(420px, calc(100% - 32px));
  padding: 10px 14px;
  border: 1px solid rgba(79, 209, 197, 0.35);
  border-radius: 7px;
  background: #0d1c2b;
  color: var(--rk-text);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
  font-size: 11px;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.rk-toast.show { opacity: 1; transform: translate(-50%, 0); }
.rk-toast.error { border-color: rgba(255, 107, 118, 0.5); color: #ff9ca4; }

@media (max-width: 920px) {
  .rk-hero { grid-template-columns: 92px minmax(0, 1fr); }
  .rk-hero-mark { width: 86px; transform: scale(0.82); transform-origin: left center; }
  .rk-auth-pill { grid-column: 2; width: max-content; }
  .rk-category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .rk-settings-band { grid-template-columns: 1fr; }
  .rk-setting { min-height: 60px; }
  .rk-board { grid-template-columns: 1fr; }
  .rk-ranking-panel { border-right: 0; border-bottom: 1px solid var(--rk-line); }
  .rk-ranking-list { min-height: 320px; }
}

@media (max-width: 700px) {
  .rk-page { width: min(100% - 24px, 1120px); }
  .rk-hero {
    grid-template-columns: 1fr;
    gap: 14px;
    min-height: 0;
    padding: 22px;
  }
  .rk-hero-mark { display: none; }
  .rk-auth-pill { grid-column: auto; }
  .rk-section { padding: 18px; }
  .rk-section-heading { align-items: flex-start; flex-direction: column; }
  .rk-mode-tabs { width: 100%; }
  .rk-mode-tabs button { flex: 1; }
  .rk-category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rk-category-card { min-height: 104px; padding: 13px; }
  .rk-action-band { align-items: stretch; flex-direction: column; }
  .rk-action-band .rk-primary { width: 100%; }
  .rk-compare-grid { grid-template-columns: 1fr; }
  .rk-online-band { grid-template-columns: 1fr; }
  .rk-player-grid { grid-template-columns: 1fr 1fr; }
  .rk-game-top { grid-template-columns: 1fr auto; }
  .rk-timer { min-width: 90px; }
  .rk-total-score {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0 0;
    border-top: 1px solid var(--rk-line);
    border-left: 0;
  }
  .rk-ranking-panel,
  .rk-pool-panel { padding: 16px; }
  .rk-item-pool { grid-template-columns: 1fr; }
  .rk-result-summary { grid-template-columns: 1fr 1fr; }
  .rk-result-score,
  .rk-metric { min-height: 80px; }
  .rk-next-row { align-items: stretch; flex-direction: column; }
  .rk-next-row .rk-primary { width: 100%; }
}

@media (max-width: 450px) {
  .rk-category-grid { grid-template-columns: 1fr 1fr; }
  .rk-category-card strong { font-size: 12px; }
  .rk-setting { align-items: stretch; flex-direction: column; }
  .rk-segmented { width: 100%; }
  .rk-segmented button { flex: 1; }
  .rk-room-head { align-items: flex-start; }
  .rk-player-grid { grid-template-columns: 1fr; }
  .rk-ranking-list { min-height: 0; }
  .rk-rank-slot { grid-template-columns: 28px 28px minmax(0, 1fr) auto; gap: 6px; }
  .rk-rank-controls button { width: 26px; height: 26px; }
  .rk-result-summary { grid-template-columns: 1fr; }
  .rk-result-score,
  .rk-metric {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 58px;
  }
  .rk-result-score strong,
  .rk-metric strong { margin: 0; font-size: 20px; }
  .rk-final-actions { align-items: stretch; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}