:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #667085;
  --surface: #eef3f0;
  --panel: #ffffff;
  --line: #d9e2df;
  --accent: #0f766e;
  --accent-dark: #0a4f4a;
  --gold: #f0b84c;
  --felt: #126954;
  --felt-dark: #0a4037;
  --rail: #704225;
  --rail-dark: #321a10;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100svh;
  background: #101724;
  color: var(--ink);
  -webkit-user-select: none;
  user-select: none;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  color: inherit;
}

button,
.operator-bar,
.expression-preview,
.game-board {
  touch-action: manipulation;
}

.app-frame {
  position: relative;
  width: min(100%, 520px);
  min-height: 100svh;
  margin: 0 auto;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 0%, rgba(240, 184, 76, 0.18), transparent 35%),
    linear-gradient(180deg, #121723 0%, #eef3f0 42%);
}

.app-frame.theme-basic {
  --felt: #126954;
  --felt-dark: #0a4037;
  --rail: #704225;
  --rail-dark: #321a10;
  --surface: #eef3f0;
}

.app-frame.theme-classroom {
  --felt: #315f4c;
  --felt-dark: #1b3c32;
  --rail: #d2ad75;
  --rail-dark: #8a6333;
  --surface: #f3ead9;
  background:
    radial-gradient(circle at 20% 0%, rgba(210, 173, 117, 0.25), transparent 36%),
    linear-gradient(180deg, #1b332c 0%, #f3ead9 42%);
}

.app-frame.theme-box {
  --felt: #d7b172;
  --felt-dark: #b88444;
  --rail: #9a6b35;
  --rail-dark: #5b3719;
  --surface: #f5ead7;
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 255, 255, 0.24), transparent 34%),
    linear-gradient(180deg, #5b3719 0%, #f5ead7 42%);
}

.app-frame.theme-star {
  --felt: #24345d;
  --felt-dark: #141a35;
  --rail: #e0bf66;
  --rail-dark: #8c6722;
  --surface: #eef2fb;
  background:
    radial-gradient(circle at 18% 0%, rgba(255, 220, 120, 0.24), transparent 34%),
    linear-gradient(180deg, #11182f 0%, #eef2fb 42%);
}

.app-frame.theme-robot {
  --felt: #54717b;
  --felt-dark: #263c44;
  --rail: #c3cbd3;
  --rail-dark: #69747d;
  --surface: #edf4f4;
  background:
    radial-gradient(circle at 18% 0%, rgba(118, 211, 194, 0.24), transparent 34%),
    linear-gradient(180deg, #1d2d34 0%, #edf4f4 42%);
}

.app-frame.theme-dino {
  --felt: #5f7f3c;
  --felt-dark: #344a24;
  --rail: #c69b61;
  --rail-dark: #73532e;
  --surface: #f2f0df;
  background:
    radial-gradient(circle at 18% 0%, rgba(205, 225, 126, 0.28), transparent 34%),
    linear-gradient(180deg, #26351e 0%, #f2f0df 42%);
}

.splash {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  grid-template-rows: 1fr auto;
  align-items: center;
  justify-items: center;
  padding: 42px 24px;
  background: #121723;
  color: #fff;
  transition: opacity 360ms ease, visibility 360ms ease;
}

.splash.done {
  opacity: 0;
  visibility: hidden;
}

.splash-table {
  position: relative;
  width: min(78vw, 340px);
  aspect-ratio: 1.18;
  border: 14px solid var(--rail);
  border-radius: 8px;
  background:
    radial-gradient(circle at 28% 20%, rgba(255, 255, 255, 0.16), transparent 34%),
    linear-gradient(145deg, var(--felt), var(--felt-dark));
  box-shadow:
    inset 0 0 0 4px rgba(0, 0, 0, 0.18),
    0 24px 80px rgba(0, 0, 0, 0.38);
}

.splash-die,
.table-die {
  position: absolute;
  display: grid;
  place-items: center;
  border-radius: 8px;
  font-weight: 900;
  letter-spacing: 0;
  -webkit-user-drag: none;
  -webkit-user-select: none;
  user-select: none;
  touch-action: none;
  box-shadow: inset 0 -5px 0 rgba(0, 0, 0, 0.16), 0 12px 24px rgba(0, 0, 0, 0.28);
}

.splash-die {
  width: 58px;
  height: 58px;
  animation: tumble 1400ms ease-in-out infinite alternate;
}

.splash-die:nth-child(odd),
.table-die.white {
  background: #fff;
  color: var(--ink);
  border: 2px solid #cfd8e3;
}

.splash-die:nth-child(even),
.table-die.black {
  background: #0b0f19;
  color: #fff;
  border: 2px solid #384252;
}

.theme-classroom .table-die.white,
.theme-classroom .game-die.white {
  background: #fffdf2;
  border-color: #e3d5a8;
}

.theme-classroom .table-die.black,
.theme-classroom .game-die.black {
  background: #1f302b;
  border-color: #88a995;
}

.theme-box .table-die.white,
.theme-box .game-die.white {
  background: #fff6df;
  border-color: #c99453;
  color: #402714;
}

.theme-box .table-die.black,
.theme-box .game-die.black {
  background: #4a2e17;
  border-color: #b38345;
}

.theme-star .table-die.white,
.theme-star .game-die.white {
  background:
    radial-gradient(circle at 76% 22%, rgba(255, 244, 163, 0.72) 0 7%, transparent 8%),
    #fffaf0;
  border-color: #e0bf66;
  color: #172033;
}

.theme-star .table-die.black,
.theme-star .game-die.black {
  background:
    radial-gradient(circle at 70% 26%, rgba(255, 244, 163, 0.5) 0 8%, transparent 9%),
    #151d3c;
  border-color: #d8b659;
}

.theme-robot .table-die.white,
.theme-robot .game-die.white {
  background:
    linear-gradient(90deg, rgba(84, 113, 123, 0.12) 0 2px, transparent 2px 14px),
    #f7fbfc;
  border-color: #9eb3bb;
  color: #172033;
}

.theme-robot .table-die.black,
.theme-robot .game-die.black {
  background:
    linear-gradient(90deg, rgba(118, 211, 194, 0.22) 0 2px, transparent 2px 12px),
    #20323a;
  border-color: #76d3c2;
}

.theme-dino .table-die.white,
.theme-dino .game-die.white {
  background:
    radial-gradient(ellipse at 72% 24%, rgba(95, 127, 60, 0.15) 0 12%, transparent 13%),
    #fff9e5;
  border-color: #b9c86a;
  color: #26351e;
}

.theme-dino .table-die.black,
.theme-dino .game-die.black {
  background: #2f4525;
  border-color: #d6ea84;
}

.theme-classroom .roll-die.white {
  background: #fffdf2;
  border-color: #e3d5a8;
}

.theme-classroom .roll-die.black {
  background: #1f302b;
  border-color: #88a995;
}

.theme-box .roll-die.white {
  background: #fff6df;
  border-color: #c99453;
  color: #402714;
}

.theme-box .roll-die.black {
  background: #4a2e17;
  border-color: #b38345;
}

.theme-star .roll-die.white {
  background:
    radial-gradient(circle at 76% 22%, rgba(255, 244, 163, 0.72) 0 7%, transparent 8%),
    #fffaf0;
  border-color: #e0bf66;
}

.theme-star .roll-die.black {
  background:
    radial-gradient(circle at 70% 26%, rgba(255, 244, 163, 0.5) 0 8%, transparent 9%),
    #151d3c;
  border-color: #d8b659;
}

.theme-robot .roll-die.white {
  background:
    linear-gradient(90deg, rgba(84, 113, 123, 0.12) 0 2px, transparent 2px 14px),
    #f7fbfc;
  border-color: #9eb3bb;
}

.theme-robot .roll-die.black {
  background:
    linear-gradient(90deg, rgba(118, 211, 194, 0.22) 0 2px, transparent 2px 12px),
    #20323a;
  border-color: #76d3c2;
}

.theme-dino .roll-die.white {
  background:
    radial-gradient(ellipse at 72% 24%, rgba(95, 127, 60, 0.15) 0 12%, transparent 13%),
    #fff9e5;
  border-color: #b9c86a;
  color: #26351e;
}

.theme-dino .roll-die.black {
  background: #2f4525;
  border-color: #d6ea84;
}

.die-a {
  left: 18%;
  top: 16%;
  transform: rotate(-18deg);
}

.die-b {
  right: 16%;
  top: 20%;
  animation-delay: 120ms;
}

.die-c {
  left: 38%;
  top: 44%;
  animation-delay: 260ms;
}

.die-d {
  left: 18%;
  bottom: 16%;
  animation-delay: 380ms;
}

.die-e {
  right: 20%;
  bottom: 18%;
  animation-delay: 520ms;
}

.brand-lockup {
  text-align: center;
}

.brand-lockup p {
  margin: 0 0 8px;
  color: #aeb8c7;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.brand-lockup h1 {
  margin: 0;
  font-size: 38px;
  letter-spacing: 0;
}

.screen:not(.active) {
  display: none !important;
}

.screen.active {
  display: grid;
}

.home {
  position: relative;
  min-height: 100svh;
  padding: max(18px, env(safe-area-inset-top)) 16px max(18px, env(safe-area-inset-bottom));
  display: grid;
  align-content: start;
  gap: 14px;
  background: linear-gradient(180deg, transparent 0 34%, var(--surface) 34% 100%);
}

.theme-classroom .home {
  background:
    linear-gradient(90deg, rgba(49, 95, 76, 0.08) 0 1px, transparent 1px 18px),
    linear-gradient(180deg, transparent 0 34%, #f3ead9 34% 100%);
}

.theme-box .home {
  background:
    linear-gradient(35deg, rgba(91, 55, 25, 0.08) 0 2px, transparent 2px 22px),
    linear-gradient(180deg, transparent 0 34%, #f5ead7 34% 100%);
}

.theme-star .home {
  background:
    radial-gradient(circle at 18% 42%, rgba(224, 191, 102, 0.18) 0 3px, transparent 4px),
    radial-gradient(circle at 82% 68%, rgba(36, 52, 93, 0.12) 0 4px, transparent 5px),
    linear-gradient(180deg, transparent 0 34%, #eef2fb 34% 100%);
}

.theme-robot .home {
  background:
    linear-gradient(90deg, rgba(84, 113, 123, 0.12) 0 1px, transparent 1px 22px),
    linear-gradient(0deg, rgba(84, 113, 123, 0.1) 0 1px, transparent 1px 22px),
    linear-gradient(180deg, transparent 0 34%, #edf4f4 34% 100%);
}

.theme-dino .home {
  background:
    radial-gradient(ellipse at 24% 52%, rgba(95, 127, 60, 0.16) 0 10px, transparent 11px),
    radial-gradient(ellipse at 76% 72%, rgba(198, 155, 97, 0.18) 0 12px, transparent 13px),
    linear-gradient(180deg, transparent 0 34%, #f2f0df 34% 100%);
}

.home-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
}

.eyebrow {
  margin: 0 0 4px;
  color: #bec8d6;
  font-size: 13px;
  font-weight: 800;
}

.home-header h1 {
  margin: 0;
  font-size: 32px;
  line-height: 1;
  letter-spacing: 0;
}

.icon-button {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 22px;
}

.hero-board {
  position: relative;
  padding-top: 4px;
}

.board-rail {
  padding: 13px;
  border-radius: 8px;
  background:
    linear-gradient(145deg, var(--rail), var(--rail-dark));
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.22);
}

.board-felt {
  position: relative;
  height: 220px;
  border-radius: 8px;
  background:
    radial-gradient(circle at 26% 18%, rgba(255, 255, 255, 0.15), transparent 34%),
    radial-gradient(circle at 76% 80%, rgba(0, 0, 0, 0.14), transparent 40%),
    linear-gradient(145deg, var(--felt), var(--felt-dark));
  box-shadow:
    inset 0 0 0 4px rgba(0, 0, 0, 0.18),
    inset 0 18px 28px rgba(255, 255, 255, 0.08),
    inset 0 -22px 32px rgba(0, 0, 0, 0.22);
  overflow: hidden;
}

.board-felt::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  pointer-events: none;
}

.theme-basic .board-felt::before {
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.08), transparent 26%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0 1px, transparent 1px 18px);
}

.theme-classroom .board-felt::before {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 28px),
    radial-gradient(circle at 70% 28%, rgba(255, 255, 255, 0.08), transparent 22%);
}

.theme-box .board-felt::before {
  background:
    linear-gradient(90deg, rgba(91, 55, 25, 0.18) 0 2px, transparent 2px 56px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.14) 0 1px, transparent 1px 42px);
}

.theme-star .board-felt::before {
  background:
    radial-gradient(circle at 18% 22%, rgba(255, 244, 163, 0.75) 0 2px, transparent 3px),
    radial-gradient(circle at 74% 38%, rgba(255, 244, 163, 0.58) 0 2px, transparent 3px),
    radial-gradient(circle at 56% 76%, rgba(255, 244, 163, 0.46) 0 2px, transparent 3px),
    linear-gradient(135deg, rgba(224, 191, 102, 0.1), transparent 52%);
}

.theme-robot .board-felt::before {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.09) 0 2px, transparent 2px 24px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.08) 0 2px, transparent 2px 24px),
    radial-gradient(circle at 76% 22%, rgba(118, 211, 194, 0.24), transparent 24%);
}

.theme-dino .board-felt::before {
  background:
    radial-gradient(ellipse at 18% 32%, rgba(214, 234, 132, 0.2) 0 12px, transparent 13px),
    radial-gradient(ellipse at 74% 72%, rgba(214, 234, 132, 0.16) 0 16px, transparent 17px),
    linear-gradient(145deg, rgba(38, 53, 30, 0.1), transparent 48%);
}

.skin-doodles {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  border-radius: 8px;
  pointer-events: none;
  user-select: none;
}

.chalk,
.box-doodle,
.star-doodle,
.robot-doodle,
.dino-doodle {
  position: absolute;
  display: none;
  z-index: 0;
  font-weight: 900;
  letter-spacing: 0;
}

.theme-classroom .chalk {
  display: block;
  color: rgba(255, 255, 255, 0.58);
  text-shadow: 0 0 1px rgba(255, 255, 255, 0.25);
}

.chalk-a {
  left: 24px;
  top: 72px;
  font-size: 18px;
  transform: rotate(-8deg);
}

.chalk-b {
  right: 26px;
  bottom: 34px;
  font-size: 20px;
  transform: rotate(7deg);
}

.chalk-c {
  left: 42%;
  top: 22px;
  font-size: 15px;
  transform: rotate(3deg);
}

.theme-box .box-doodle {
  display: block;
  color: rgba(73, 45, 18, 0.55);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.18);
}

.box-a {
  left: 24px;
  top: 76px;
  font-size: 18px;
  transform: rotate(-12deg);
}

.box-b {
  right: 36px;
  top: 52px;
  font-size: 22px;
  transform: rotate(15deg);
}

.box-c {
  right: 28px;
  bottom: 32px;
  font-size: 15px;
  transform: rotate(-6deg);
}

.theme-star .star-doodle {
  display: block;
  color: rgba(255, 244, 163, 0.68);
  text-shadow: 0 0 10px rgba(255, 244, 163, 0.24);
}

.star-a {
  left: 26px;
  bottom: 28px;
  font-size: 17px;
  transform: rotate(-9deg);
}

.star-b {
  right: 42px;
  top: 36px;
  font-size: 30px;
  transform: rotate(14deg);
}

.star-c {
  left: 48%;
  top: 74px;
  font-size: 18px;
  transform: rotate(8deg);
}

.theme-robot .robot-doodle {
  display: block;
  color: rgba(198, 232, 228, 0.62);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
}

.robot-a {
  left: 22px;
  top: 78px;
  font-size: 16px;
  transform: rotate(-4deg);
}

.robot-b {
  right: 26px;
  bottom: 34px;
  font-size: 15px;
  transform: rotate(5deg);
}

.robot-c {
  right: 48px;
  top: 36px;
  font-size: 26px;
}

.theme-dino .dino-doodle {
  display: block;
  color: rgba(246, 235, 180, 0.62);
}

.dino-a {
  left: 28px;
  bottom: 36px;
  font-size: 16px;
  transform: rotate(-11deg);
}

.dino-b {
  right: 30px;
  top: 54px;
  font-size: 15px;
  transform: rotate(9deg);
}

.dino-c {
  left: 48%;
  bottom: 78px;
  font-size: 18px;
  transform: rotate(-6deg);
}

.table-die {
  width: 58px;
  height: 58px;
  font-size: 27px;
  z-index: 1;
}

.table-die.small {
  width: 50px;
  height: 50px;
}

.board-felt .black:first-child {
  left: 18px;
  top: 18px;
  transform: rotate(-10deg);
}

.board-felt .black.small {
  right: 26px;
  top: 28px;
  transform: rotate(14deg);
}

.die-one {
  left: 64px;
  bottom: 46px;
  transform: rotate(12deg);
}

.die-two {
  left: 138px;
  bottom: 76px;
  transform: rotate(-18deg);
}

.die-three {
  right: 82px;
  bottom: 42px;
  transform: rotate(8deg);
}

.die-four {
  left: 24px;
  bottom: 106px;
  transform: rotate(22deg);
}

.die-five {
  right: 28px;
  bottom: 112px;
  transform: rotate(-12deg);
}

.target-chip {
  position: absolute;
  left: 50%;
  bottom: -13px;
  transform: translateX(-50%);
  min-width: 126px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--gold);
  color: #1f2937;
  font-weight: 900;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.22);
}

.profile-card,
.skin-strip {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 20px rgba(23, 32, 51, 0.08);
}

.profile-card {
  margin-top: 14px;
  padding: 14px;
  display: grid;
  gap: 12px;
}

.profile-copy span,
.section-title h2 {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.profile-copy strong {
  display: block;
  margin-top: 2px;
  font-size: 20px;
}

.nickname-field {
  display: grid;
  gap: 6px;
}

.nickname-field span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.nickname-field input {
  width: 100%;
  height: 46px;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 800;
  outline: none;
}

.nickname-field input:focus {
  border-color: var(--accent);
}

.mode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.primary-action,
.locked-action {
  min-height: 86px;
  border-radius: 8px;
  padding: 12px;
  display: grid;
  gap: 4px;
  align-content: center;
  text-align: left;
}

.primary-action {
  background: var(--accent);
  color: #fff;
  text-align: center;
}

.locked-action {
  background: #fff4cf;
  color: var(--ink);
  box-shadow: inset 0 0 0 2px rgba(240, 184, 76, 0.55);
}

.locked-action.unlocked {
  background: #fff4cf;
  box-shadow: inset 0 0 0 2px rgba(240, 184, 76, 0.55);
}

.primary-action span,
.locked-action span {
  font-size: 12px;
  font-weight: 800;
  opacity: 0.78;
}

.primary-action strong,
.locked-action strong {
  font-size: 18px;
  line-height: 1.2;
}

.unlock-bar {
  width: 100%;
  height: 9px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(23, 32, 51, 0.13);
}

.unlock-bar span {
  display: block;
  width: 37%;
  height: 100%;
  border-radius: inherit;
  background: var(--gold);
}

.online-screen {
  min-height: 100svh;
  padding: max(16px, env(safe-area-inset-top)) 16px max(18px, env(safe-area-inset-bottom));
  align-content: start;
  gap: 12px;
  background:
    radial-gradient(circle at 16% 8%, rgba(240, 184, 76, 0.22), transparent 28%),
    linear-gradient(180deg, #121723 0 32%, var(--surface) 32% 100%);
}

.online-screen.phase-menu .battle-lobby,
.online-screen.phase-menu .leave-room-button,
.online-screen.phase-lobby .online-hero,
.online-screen.phase-lobby .battle-goal-card,
.online-screen.phase-lobby .online-menu,
.online-screen.phase-playing .online-hero,
.online-screen.phase-playing .battle-goal-card,
.online-screen.phase-playing .online-menu,
.online-screen.phase-playing .lobby-header,
.online-screen.phase-playing .battle-rule-note,
.online-screen.phase-playing .player-list,
.online-screen.phase-playing .score-board,
.online-screen.phase-playing .ready-button,
.online-screen.phase-playing .battle-result-summary,
.online-screen.phase-playing .battle-result-list,
.online-screen.phase-playing .battle-ad-slot,
.online-screen.phase-result .online-hero,
.online-screen.phase-result .battle-goal-card,
.online-screen.phase-result .online-menu,
.online-screen.phase-result .battle-rule-note,
.online-screen.phase-result .player-list,
.online-screen.phase-result .battle-round-panel {
  display: none;
}

.leave-room-button {
  width: 72px;
  height: 40px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 13px;
  font-weight: 950;
}

.online-screen .game-header {
  grid-template-columns: 54px minmax(0, 1fr) 72px;
}

.online-screen.phase-playing .battle-lobby {
  padding: 0;
  background: transparent;
  box-shadow: none;
}

.online-screen.phase-lobby .battle-lobby,
.online-screen.phase-result .battle-lobby {
  min-height: calc(100svh - 96px);
  align-content: start;
}

.online-screen.phase-result .battle-result-summary {
  order: 1;
}

.online-screen.phase-result .battle-result-list {
  order: 2;
}

.online-screen.phase-result .score-board {
  order: 3;
}

.online-screen.phase-result .ready-button {
  order: 4;
}

.online-screen.phase-result .host-control-button {
  order: 5;
}

.online-screen.phase-result .battle-ad-slot {
  order: 6;
}

.online-hero {
  min-height: 162px;
  padding: 18px;
  border-radius: 8px;
  display: grid;
  align-content: space-between;
  gap: 16px;
  background:
    linear-gradient(145deg, rgba(18, 105, 84, 0.9), rgba(10, 64, 55, 0.96)),
    var(--felt);
  color: #fff;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.08), 0 16px 34px rgba(0, 0, 0, 0.2);
}

.online-hero span,
.online-hero p,
.online-progress-card {
  font-weight: 900;
}

.online-hero span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}

.online-hero h2 {
  margin: 4px 0 6px;
  font-size: 27px;
  line-height: 1.12;
  letter-spacing: 0;
}

.online-hero p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
  line-height: 1.45;
}

.online-progress-card {
  display: grid;
  gap: 8px;
}

.online-progress-card strong {
  font-size: 22px;
  font-variant-numeric: tabular-nums;
}

.firebase-status {
  color: rgba(255, 255, 255, 0.68);
  font-size: 11px;
  font-weight: 850;
}

.firebase-status[data-connected="true"] {
  color: #b9f3d4;
}

.online-menu {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px;
}

.online-menu button {
  min-height: 82px;
  padding: 12px;
  border-radius: 8px;
  display: grid;
  align-content: center;
  gap: 4px;
  background: #fff;
  color: var(--ink);
  text-align: left;
  box-shadow: inset 0 0 0 1px rgba(23, 32, 51, 0.08), 0 8px 18px rgba(23, 32, 51, 0.08);
}

.online-menu .large-room-button {
  grid-column: 1 / -1;
}

.online-menu strong {
  font-size: 17px;
  font-weight: 950;
}

.online-menu span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
}

.battle-goal-card {
  padding: 10px;
  border-radius: 8px;
  display: grid;
  gap: 8px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(23, 32, 51, 0.08), 0 8px 18px rgba(23, 32, 51, 0.08);
}

.battle-goal-card > span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 950;
}

.battle-goal-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.speedrun-time-options {
  grid-template-columns: repeat(3, 1fr);
}

.speedrun-mode-options,
.speedrun-question-options {
  grid-template-columns: repeat(2, 1fr);
}

.speedrun-setting-group {
  display: grid;
  gap: 8px;
}

.speedrun-setting-group > span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 950;
}

.speedrun-setting-group.disabled-setting {
  opacity: 0.42;
}

.speedrun-setting-group.disabled-setting button {
  cursor: not-allowed;
  filter: grayscale(1);
}

.competitive-rule-info {
  margin: 0;
  padding: 12px;
  border: 1px solid rgba(240, 184, 76, 0.45);
  border-radius: 8px;
  background: #fff7e6;
  color: #5d430e;
  font-size: 13px;
  font-weight: 850;
  line-height: 1.55;
}

.battle-goal-options button {
  height: 38px;
  border-radius: 8px;
  background: #eef2f6;
  color: var(--ink);
  font-size: 13px;
  font-weight: 950;
}

.battle-goal-options button.active {
  background: var(--accent);
  color: #fff;
}

.competition-notice {
  position: absolute;
  inset: 0;
  z-index: 8;
  display: grid;
  place-content: center;
  padding: 24px;
  background: rgba(8, 12, 20, 0.96);
  color: #fff;
  text-align: center;
}

.competition-notice[hidden] {
  display: none;
}

.competition-notice span {
  max-width: min(88vw, 420px);
  overflow-wrap: anywhere;
  color: #f8fafc;
  font-size: 44px;
  font-weight: 950;
  line-height: 1.05;
  text-shadow: 0 0 28px rgba(240, 184, 76, 0.7);
}

.battle-lobby {
  padding: 14px;
  border-radius: 8px;
  display: grid;
  gap: 12px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(23, 32, 51, 0.08), 0 12px 28px rgba(23, 32, 51, 0.1);
}

.lobby-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.lobby-header span,
.lobby-header small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.lobby-header strong {
  display: block;
  margin-top: 2px;
  color: var(--accent-dark);
  font-size: 31px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.battle-rule-note {
  margin: 0;
  padding: 9px 10px;
  border-radius: 8px;
  background: #f7faf9;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 900;
  text-align: center;
}

.player-list {
  display: grid;
  gap: 8px;
}

.player-row {
  min-height: 54px;
  padding: 8px 10px;
  border-radius: 8px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  background: #f3f6f8;
}

.player-row.me {
  background: #eff8f5;
}

.player-badge {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 950;
}

.player-row strong {
  min-width: 0;
  font-size: 15px;
  font-weight: 950;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-row em {
  color: #3b2a0c;
  font-size: 13px;
  font-style: normal;
  font-weight: 950;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.player-row small {
  grid-column: 2 / 4;
  color: var(--muted);
  font-size: 11px;
  font-weight: 900;
}

.ready-button,
.host-control-button {
  height: 48px;
  border-radius: 8px;
  font-weight: 950;
}

.ready-button {
  background: var(--gold);
  color: #3b2a0c;
}

.ready-button:disabled {
  opacity: 0.72;
}

.host-control-button {
  background: #263241;
  color: #fff;
}

.host-control-button[hidden] {
  display: none;
}

.battle-round-panel {
  padding: 12px;
  border-radius: 8px;
  display: grid;
  gap: 10px;
  background:
    linear-gradient(145deg, rgba(18, 105, 84, 0.94), rgba(10, 64, 55, 0.98)),
    var(--felt);
  color: #fff;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.08);
}

.battle-round-panel[hidden] {
  display: none;
}

.battle-time-row {
  min-height: 42px;
  padding: 8px 10px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: rgba(0, 0, 0, 0.16);
}

.battle-time-row strong {
  font-size: 14px;
  font-weight: 950;
}

.battle-time-row span {
  min-width: 86px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: #1f2937;
  font-size: 18px;
  font-weight: 950;
  font-variant-numeric: tabular-nums;
}

.battle-time-row .battle-room-code {
  min-width: 96px;
  padding: 0 10px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 13px;
  letter-spacing: 0;
}

.battle-play-layout {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  gap: 10px;
  align-items: stretch;
}

.battle-party-panel {
  min-width: 0;
  padding: 9px;
  border-radius: 8px;
  display: grid;
  align-content: start;
  gap: 8px;
  background: rgba(0, 0, 0, 0.16);
}

.battle-party-title {
  color: rgba(255, 255, 255, 0.7);
  font-size: 11px;
  font-weight: 950;
}

.battle-play-area {
  position: relative;
  min-width: 0;
  display: grid;
  gap: 10px;
  align-content: start;
}

.battle-countdown-layer {
  position: absolute;
  inset: 0;
  z-index: 3;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: rgba(8, 18, 28, 0.42);
  pointer-events: none;
}

.battle-countdown-layer[hidden] {
  display: none;
}

.battle-countdown-layer strong {
  width: 86px;
  height: 86px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: #1f2937;
  font-size: 48px;
  font-weight: 950;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.28);
}

.battle-problem-card {
  position: relative;
  padding: 10px;
  border-radius: 8px;
  display: grid;
  gap: 10px;
  background: rgba(255, 255, 255, 0.1);
}

.battle-problem-card .pass-button {
  position: absolute;
  top: 8px;
  right: 8px;
  min-width: 74px;
  height: 34px;
  padding: 0 12px;
  border-radius: 8px;
  background: #e88973;
  color: #37120b;
  font-size: 14px;
  font-weight: 950;
  box-shadow: inset 0 0 0 1px rgba(90, 24, 16, 0.18), 0 5px 12px rgba(59, 18, 11, 0.16);
}

.battle-problem-card .pass-button[hidden] {
  display: none;
}

.battle-problem-card .pass-button:disabled {
  opacity: 0.48;
}

.battle-target-dice {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  padding-right: 82px;
}

.battle-target-dice {
  gap: 8px;
  font-weight: 950;
  flex-wrap: wrap;
}

.battle-target-dice strong {
  min-width: 82px;
  height: 38px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: #1f2937;
  font-size: 14px;
}

.battle-dice-row {
  padding-top: 0;
}

.battle-dice-row .game-die {
  height: 46px;
  font-size: 21px;
}

.battle-expression-input {
  width: 100%;
  height: 136px;
  min-height: 136px;
  padding: 8px;
  flex-wrap: wrap;
  justify-content: center;
  align-content: flex-start;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.12);
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior-block: contain;
  -webkit-overflow-scrolling: touch;
}

.battle-expression-input .expression-token,
.battle-expression-input .empty-expression,
.battle-expression-input .insert-slot {
  min-height: 36px;
}

.battle-expression-input .empty-expression {
  width: min(100%, 260px);
  min-width: 0;
  justify-self: stretch;
  text-align: center;
}

.battle-operator-bar button {
  height: 34px;
  font-size: 18px;
}

.battle-action-row .answer-check-button,
.battle-action-row .clear-expression-button {
  height: 38px;
}

.battle-action-row .answer-check-button {
  font-size: 16px;
}

.battle-action-row .answer-check-button.submitted {
  background: #d6dde5;
  color: #4b5563;
}

.battle-action-row .clear-expression-button {
  font-size: 13px;
}

.battle-feedback {
  min-height: 40px;
  margin: 0;
}

.battle-status-list {
  display: grid;
  gap: 6px;
}

.party-member {
  min-height: 54px;
  padding: 7px;
  border-radius: 8px;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.12);
}

.party-member[data-status="입력중"] {
  background: rgba(255, 255, 255, 0.18);
}

.party-member[data-status="완료"] {
  background: rgba(240, 184, 76, 0.22);
}

.party-avatar {
  width: 58px;
  height: 30px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: #3b2a0c;
  font-size: 10px;
  font-weight: 950;
  white-space: nowrap;
}

.battle-status-list strong,
.battle-status-list span,
.battle-status-list em {
  font-weight: 950;
}

.battle-status-list strong {
  min-width: 0;
  overflow: hidden;
  color: #fff;
  font-size: 12px;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.battle-status-list em {
  color: var(--gold);
  font-size: 11px;
  font-style: normal;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.battle-secret-note {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 11px;
  font-weight: 850;
  text-align: center;
}

.score-board {
  padding: 10px;
  border-radius: 8px;
  display: grid;
  gap: 6px;
  background: #f3f6f8;
}

.score-board:empty {
  display: none;
}

.battle-result-summary {
  padding: 12px;
  border-radius: 8px;
  display: grid;
  gap: 8px;
  background: #fff;
}

.battle-result-summary[hidden] {
  display: none;
}

.battle-result-summary div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.battle-result-summary span,
.battle-result-summary p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.battle-result-summary strong {
  color: var(--ink);
  font-size: 18px;
  font-weight: 950;
}

.score-board div {
  min-height: 34px;
  padding: 6px 8px;
  border-radius: 8px;
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 8px;
  background: #fff;
}

.score-board span,
.score-board strong,
.score-board em {
  font-weight: 950;
}

.score-board span {
  color: var(--accent-dark);
  font-size: 12px;
}

.score-board strong {
  font-size: 13px;
}

.score-board em {
  color: #3b2a0c;
  font-style: normal;
  font-variant-numeric: tabular-nums;
}

.battle-result-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
  list-style: none;
}

.battle-result-list li {
  min-height: 48px;
  padding: 8px 10px;
  border-radius: 8px;
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 8px;
  align-items: center;
  background: #fff8e4;
}

.battle-result-list li.timeout {
  background: #eef2f6;
}

.battle-result-list span {
  min-width: 28px;
  height: 28px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: #3b2a0c;
  font-weight: 950;
}

.battle-result-list strong,
.battle-result-list em {
  font-weight: 950;
}

.battle-result-list em {
  color: var(--accent-dark);
  font-style: normal;
  font-variant-numeric: tabular-nums;
}

.battle-result-list small {
  grid-column: 2 / 4;
  color: var(--muted);
  font-size: 11px;
  font-weight: 850;
}

.ad-slot {
  min-height: 86px;
  padding: 14px 8px 8px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  background: #fff;
  border: 1px solid #d8e0e8;
}

.ad-slot[hidden] {
  display: none;
}

.ad-slot span {
  position: absolute;
  left: 8px;
  top: 3px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 900;
}

.ad-slot img {
  width: 100%;
  max-height: 68px;
  object-fit: contain;
  display: block;
}

.skin-strip {
  padding: 14px;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.section-title h2 {
  margin: 0;
}

.section-title button,
.quiet-button {
  background: transparent;
  color: var(--accent-dark);
  font-weight: 900;
}

.reward-status {
  min-height: 58px;
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  display: grid;
  gap: 2px;
  background: #f0f7f4;
  box-shadow: inset 0 0 0 1px rgba(15, 118, 110, 0.12);
}

.reward-status strong {
  color: var(--accent-dark);
  font-size: 22px;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.reward-status span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.current-skin-card {
  width: 100%;
  min-height: 68px;
  padding: 12px;
  border-radius: 8px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 12px;
  background: #f6f8fa;
  color: var(--ink);
  text-align: left;
}

.current-skin-card small {
  display: block;
  margin-bottom: 2px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.current-skin-card strong {
  font-size: 19px;
  font-weight: 900;
}

.current-skin-card .swatch {
  width: 52px;
  height: 38px;
}

.reward-claim-button {
  width: 100%;
  height: 46px;
  margin-top: 10px;
  border-radius: 8px;
  background: var(--gold);
  color: #3b2a0c;
  font-weight: 900;
}

.skin-sheet {
  position: fixed;
  inset: 0;
  z-index: 22;
}

.skin-sheet[hidden] {
  display: none;
}

.skin-sheet-panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  max-height: min(78svh, 680px);
  padding: 10px 16px max(16px, env(safe-area-inset-bottom));
  border-radius: 8px 8px 0 0;
  display: grid;
  grid-template-rows: auto auto auto 1fr;
  background: #fff;
  color: var(--ink);
  box-shadow: 0 -18px 55px rgba(0, 0, 0, 0.28);
  animation: sheet-up 260ms ease-out both;
}

.skin-sheet-summary {
  min-height: 52px;
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  display: grid;
  gap: 2px;
  background: #f0f7f4;
}

.skin-sheet-summary strong {
  color: var(--accent-dark);
  font-size: 20px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.skin-sheet-summary span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.skin-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-bottom: 4px;
}

.skin-option {
  position: relative;
  min-height: 94px;
  border: 2px solid transparent;
  border-radius: 8px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 6px;
  padding: 10px 6px;
  background: #f6f8fa;
  color: var(--ink);
  font-weight: 900;
  overflow: hidden;
}

.skin-option.active {
  border-color: var(--accent);
  background: #e0f4ef;
}

.skin-option strong {
  max-width: 100%;
  font-size: 13px;
  line-height: 1.15;
  text-align: center;
}

.skin-option small {
  color: var(--muted);
  font-size: 11px;
  font-weight: 900;
}

.skin-option.locked {
  filter: grayscale(1);
  opacity: 0.7;
}

.skin-option.locked::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.44), transparent 45%),
    rgba(114, 123, 136, 0.3);
}

.skin-option.locked::after {
  content: "잠김";
  position: absolute;
  right: 6px;
  top: 6px;
  padding: 3px 6px;
  border-radius: 999px;
  background: rgba(23, 32, 51, 0.74);
  color: #fff;
  font-size: 10px;
}

.skin-option.unclaimed {
  border-color: var(--gold);
  background: #fff8e8;
}

.skin-option.unclaimed::after {
  content: "받기";
  position: absolute;
  right: 6px;
  top: 6px;
  padding: 3px 6px;
  border-radius: 999px;
  background: var(--gold);
  color: #3b2a0c;
  font-size: 10px;
}

.settings-sheet,
.online-difficulty-sheet {
  position: fixed;
  inset: 0;
  z-index: 24;
}

.settings-sheet[hidden],
.online-difficulty-sheet[hidden] {
  display: none;
}

.settings-panel {
  max-height: min(86svh, 720px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.settings-nickname-field {
  margin-top: 14px;
}

.settings-help {
  min-height: 18px;
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.settings-row {
  min-height: 64px;
  margin-top: 12px;
  padding: 12px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #f6f8fa;
}

.settings-row strong,
.settings-info-list strong {
  display: block;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.25;
}

.settings-row span,
.settings-info-list span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  line-height: 1.3;
}

.settings-toggle {
  min-width: 66px;
  height: 38px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 900;
}

.settings-toggle.off {
  background: #8b95a1;
}

.settings-details {
  margin-top: 12px;
  padding: 12px;
  border-radius: 8px;
  background: #f0f7f4;
}

.settings-details summary {
  cursor: pointer;
  color: var(--accent-dark);
  font-weight: 950;
}

.settings-details p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.45;
}

.settings-info-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.settings-info-list div {
  padding: 10px 12px;
  border-radius: 8px;
  background: #f8fafc;
}

.settings-reset-button {
  width: 100%;
  height: 48px;
  margin-top: 12px;
  border-radius: 8px;
  background: #fee2e2;
  color: #991b1b;
  font-weight: 950;
}

.swatch {
  width: 34px;
  height: 24px;
  border-radius: 8px;
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.16);
}

.swatch.basic {
  background: linear-gradient(135deg, #126954 0 60%, #704225 60%);
}

.swatch.classroom {
  background: linear-gradient(135deg, #2f5e48 0 60%, #d7b98f 60%);
}

.swatch.box {
  background: linear-gradient(135deg, #d9b879 0 50%, #9a6b35 50%);
}

.swatch.star,
.reward-swatch.star {
  background:
    radial-gradient(circle at 26% 28%, #fff4a3 0 8%, transparent 9%),
    radial-gradient(circle at 72% 66%, #fff4a3 0 7%, transparent 8%),
    linear-gradient(135deg, #253760 0 62%, #d4af48 62%);
}

.swatch.robot,
.reward-swatch.robot {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.28) 0 2px, transparent 2px 10px),
    linear-gradient(135deg, #6f8790 0 58%, #c7d2db 58%);
}

.swatch.dino,
.reward-swatch.dino {
  background:
    radial-gradient(circle at 70% 34%, #d6ea84 0 8%, transparent 9%),
    linear-gradient(135deg, #5f7f3c 0 58%, #c69b61 58%);
}

.solo-sheet {
  position: fixed;
  inset: 0;
  z-index: 20;
}

.join-code-sheet {
  position: fixed;
  inset: 0;
  z-index: 21;
}

.join-code-sheet[hidden] {
  display: none;
}

.sheet-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(16, 23, 36, 0.46);
}

.sheet-panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 16px max(16px, env(safe-area-inset-bottom));
  border-radius: 8px 8px 0 0;
  background: #fff;
  color: var(--ink);
  box-shadow: 0 -18px 55px rgba(0, 0, 0, 0.28);
  animation: sheet-up 260ms ease-out both;
}

.sheet-handle {
  width: 44px;
  height: 5px;
  margin: 0 auto 12px;
  border-radius: 999px;
  background: #d4dce6;
}

.sheet-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
}

.sheet-header span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.sheet-header h2 {
  margin: 2px 0 0;
  font-size: 27px;
  letter-spacing: 0;
}

.sheet-close {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: #eef2f6;
  color: var(--ink);
  font-size: 26px;
  line-height: 1;
}

.clear-count {
  height: 58px;
  margin-top: 14px;
  padding: 0 14px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #eff8f5;
  color: var(--accent-dark);
  font-weight: 900;
}

.clear-count span {
  color: var(--muted);
  font-size: 13px;
}

.clear-count strong {
  font-size: 22px;
}

.difficulty-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.difficulty-card {
  min-height: 88px;
  border: 2px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 4px;
  align-content: center;
  padding: 12px;
  background: #f8fafc;
  text-align: left;
}

.difficulty-card.active {
  border-color: var(--accent);
  background: #e0f4ef;
}

.difficulty-card span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.difficulty-card strong {
  font-size: 18px;
}

.sheet-start {
  width: 100%;
  height: 54px;
  margin-top: 12px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 18px;
  font-weight: 900;
}

.join-code-field {
  margin-top: 14px;
  display: grid;
  gap: 6px;
}

.join-code-field span,
.join-code-help {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.join-code-field input {
  width: 100%;
  height: 58px;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  color: var(--ink);
  font-size: 26px;
  font-weight: 950;
  letter-spacing: 4px;
  text-transform: uppercase;
  outline: none;
}

.join-code-field input:focus {
  border-color: var(--accent);
}

.join-code-help {
  margin: 8px 0 0;
}

.game-screen {
  min-height: 100svh;
  grid-template-rows: auto 1fr auto auto;
  gap: 10px;
  padding: max(16px, env(safe-area-inset-top)) 14px max(14px, env(safe-area-inset-bottom));
  background:
    radial-gradient(circle at 20% 0%, rgba(240, 184, 76, 0.16), transparent 35%),
    linear-gradient(180deg, #121723 0%, var(--surface) 36%);
}

.theme-classroom .game-screen {
  background:
    radial-gradient(circle at 22% 0%, rgba(210, 173, 117, 0.2), transparent 34%),
    linear-gradient(180deg, #1b332c 0%, #f3ead9 36%);
}

.theme-box .game-screen {
  background:
    linear-gradient(35deg, rgba(91, 55, 25, 0.08) 0 2px, transparent 2px 24px),
    linear-gradient(180deg, #5b3719 0%, #f5ead7 36%);
}

.theme-star .game-screen {
  background:
    radial-gradient(circle at 20% 8%, rgba(255, 244, 163, 0.18) 0 3px, transparent 4px),
    radial-gradient(circle at 86% 16%, rgba(255, 244, 163, 0.12) 0 4px, transparent 5px),
    linear-gradient(180deg, #11182f 0%, #eef2fb 36%);
}

.theme-robot .game-screen {
  background:
    linear-gradient(90deg, rgba(118, 211, 194, 0.08) 0 1px, transparent 1px 24px),
    linear-gradient(180deg, #1d2d34 0%, #edf4f4 36%);
}

.theme-dino .game-screen {
  background:
    radial-gradient(ellipse at 18% 12%, rgba(214, 234, 132, 0.2) 0 12px, transparent 13px),
    linear-gradient(180deg, #26351e 0%, #f2f0df 36%);
}

.game-header {
  display: grid;
  grid-template-columns: 54px 1fr 44px;
  align-items: center;
  gap: 10px;
  color: #fff;
}

.back-button {
  height: 42px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-weight: 900;
}

.game-title {
  text-align: center;
}

.game-title span {
  display: block;
  color: #bec8d6;
  font-size: 12px;
  font-weight: 900;
}

.game-title strong {
  display: block;
  margin-top: 2px;
  font-size: 30px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.game-board {
  min-height: 0;
  display: grid;
}

.game-board .board-rail {
  min-height: 100%;
  display: grid;
}

.game-felt {
  height: auto;
  min-height: 430px;
  display: grid;
  grid-template-rows: auto auto 1fr auto auto;
  gap: 10px;
  padding: 16px 14px 18px;
}

.game-target {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.12);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.target-dice {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  font-weight: 900;
}

.game-target strong {
  min-width: 94px;
  height: 42px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: #1f2937;
  font-weight: 900;
}

.game-status-line {
  position: relative;
  z-index: 1;
  min-height: 28px;
  padding: 6px 10px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.86);
  font-size: 12px;
  font-weight: 900;
  text-align: center;
}

.expression-preview {
  position: relative;
  z-index: 1;
  align-self: center;
  justify-self: center;
  max-width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1px;
  padding: 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(6px);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16);
}

.expression-token,
.expression-preview .empty-expression,
.insert-slot {
  min-width: 34px;
  height: 40px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font-size: 22px;
  font-weight: 900;
  box-shadow: 0 8px 14px rgba(0, 0, 0, 0.14);
}

.expression-token {
  border: 0;
  position: relative;
}

.insert-slot {
  min-width: 9px;
  width: 9px;
  border: 0;
  background: transparent;
  color: transparent;
  font-size: 0;
  box-shadow: none;
}

.insert-slot.active {
  min-width: 6px;
  width: 6px;
  border-radius: 999px;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(240, 184, 76, 0.22);
}

.number-token.selected {
  outline: 3px solid var(--gold);
  background: #fff7dc;
}

.number-token sup {
  position: absolute;
  right: 4px;
  top: -10px;
  min-width: 18px;
  height: 18px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: #2f2108;
  font-size: 12px;
}

.operator-token {
  background: rgba(232, 238, 244, 0.96);
}

.expression-preview .empty-expression {
  width: min(100%, 260px);
  padding: 0 12px;
  background: transparent;
  color: rgba(255, 255, 255, 0.84);
  box-shadow: none;
  font-size: 14px;
}

.game-feedback {
  position: relative;
  z-index: 1;
  min-height: 38px;
  padding: 8px 10px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.16);
  color: rgba(255, 255, 255, 0.92);
  font-size: 13px;
  font-weight: 900;
  text-align: center;
}

.game-feedback.error {
  background: rgba(180, 45, 45, 0.42);
}

.game-feedback.success {
  background: rgba(15, 118, 110, 0.44);
}

.countdown-layer {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  border-radius: inherit;
  background: rgba(11, 15, 25, 0.42);
  backdrop-filter: blur(3px);
}

.countdown-layer[hidden] {
  display: none;
}

.countdown-layer strong {
  width: 124px;
  height: 124px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.92);
  color: var(--accent-dark);
  font-size: 72px;
  line-height: 1;
  font-weight: 950;
  box-shadow: 0 22px 52px rgba(0, 0, 0, 0.28);
  animation: countdown-pop 520ms ease-out both;
}

.game-dice-row {
  position: relative;
  z-index: 1;
  align-self: end;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  padding: 4px 0 0;
}

.game-dice-row[hidden] {
  display: none;
}

.game-die {
  height: 54px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 24px;
  font-weight: 900;
  box-shadow: inset 0 -5px 0 rgba(0, 0, 0, 0.14), 0 6px 14px rgba(0, 0, 0, 0.14);
}

.roll-layer {
  position: absolute;
  inset: 0;
  z-index: 4;
  border-radius: inherit;
  overflow: hidden;
  pointer-events: none;
}

.roll-layer::before {
  content: "";
  position: absolute;
  inset: 12px;
  z-index: 0;
  border-radius: 10px;
  border: 2px solid rgba(255, 255, 255, 0.18);
  box-shadow:
    inset 0 0 0 3px rgba(0, 0, 0, 0.12),
    inset 0 18px 26px rgba(255, 255, 255, 0.06),
    inset 0 -18px 26px rgba(0, 0, 0, 0.15);
}

.roll-layer[hidden] {
  display: none;
}

.roll-stage {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.roll-die {
  position: absolute;
  left: 0;
  top: 0;
  width: 50px;
  height: 50px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 25px;
  font-weight: 950;
  box-shadow:
    inset 0 -6px 0 rgba(0, 0, 0, 0.16),
    0 14px 24px rgba(0, 0, 0, 0.28);
  animation: roll-bounce 940ms cubic-bezier(0.2, 0.78, 0.26, 1.02) both;
  animation-delay: var(--delay);
}

.roll-die.white {
  background: #fff;
  color: var(--ink);
  border: 2px solid #cfd8e3;
}

.roll-die.black {
  background: #0b0f19;
  color: #fff;
  border: 2px solid #384252;
}

.game-die.white {
  background: #fff;
  color: var(--ink);
  border: 2px solid #cfd8e3;
}

.game-die.white.used {
  opacity: 0.38;
  transform: translateY(2px);
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.1);
}

.game-die.black {
  width: 48px;
  height: 48px;
  background: #0b0f19;
  color: #fff;
  border: 2px solid #384252;
}

.operator-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 0 2px;
}

.operator-bar button {
  height: 44px;
  border-radius: 8px;
  background: #e8eef4;
  color: var(--ink);
  font-size: 22px;
  font-weight: 900;
}

.operator-bar .hidden-op {
  display: none;
}

.operator-bar button.mode-on {
  background: var(--gold);
  color: #3b2a0c;
}

.game-action-row {
  display: grid;
  grid-template-columns: minmax(112px, 0.7fr) 1fr;
  gap: 8px;
  padding: 0 2px;
}

.answer-check-button {
  width: 100%;
  height: 50px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 18px;
  font-weight: 900;
  box-shadow: 0 8px 18px rgba(15, 118, 110, 0.22);
}

.clear-expression-button {
  width: 100%;
  height: 50px;
  border-radius: 8px;
  background: #e8eef4;
  color: var(--ink);
  font-size: 15px;
  font-weight: 900;
}

.answer-check-button:disabled,
.clear-expression-button:disabled,
.operator-bar button:disabled,
.game-die:disabled {
  cursor: default;
}

.success-result {
  position: fixed;
  inset: 0;
  z-index: 28;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(16, 23, 36, 0.54);
}

.success-result[hidden] {
  display: none;
}

.result-card {
  width: min(100%, 356px);
  padding: 22px 18px 18px;
  border-radius: 8px;
  display: grid;
  gap: 14px;
  background: #fff;
  color: var(--ink);
  text-align: center;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
  animation: reward-pop 220ms ease-out both;
}

.result-kicker {
  color: var(--accent-dark);
  font-size: 34px;
  line-height: 1;
  font-weight: 900;
}

.result-time {
  color: #101724;
  font-size: 48px;
  line-height: 1;
  font-weight: 950;
  font-variant-numeric: tabular-nums;
}

.result-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.result-stats div {
  min-height: 74px;
  padding: 10px 8px;
  border-radius: 8px;
  display: grid;
  align-content: center;
  gap: 4px;
  background: #f4f7f8;
}

.result-stats span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.result-stats strong {
  color: var(--accent-dark);
  font-size: 20px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.result-card p {
  margin: -4px 0 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 900;
}

.result-reward-button {
  height: 48px;
  border-radius: 8px;
  background: var(--gold);
  color: #3b2a0c;
  font-weight: 900;
}

.result-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.result-actions button {
  height: 50px;
  border-radius: 8px;
  font-weight: 900;
}

.result-next {
  background: var(--accent);
  color: #fff;
}

.result-home {
  background: #eef2f6;
  color: var(--ink);
}

.battle-final-modal {
  position: fixed;
  inset: 0;
  z-index: 29;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(16, 23, 36, 0.62);
}

.battle-final-modal[hidden] {
  display: none;
}

.battle-final-card {
  width: min(100%, 360px);
  padding: 22px 18px 18px;
  border-radius: 8px;
  display: grid;
  gap: 12px;
  background: #fff;
  color: var(--ink);
  text-align: center;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
  animation: reward-pop 220ms ease-out both;
}

.battle-final-card > span {
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 950;
}

.battle-final-card > strong {
  color: #101724;
  font-size: 30px;
  line-height: 1.05;
  font-weight: 950;
}

.battle-final-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.battle-final-card ol {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
  list-style: none;
}

.battle-final-card li {
  min-height: 42px;
  padding: 8px 10px;
  border-radius: 8px;
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 8px;
  background: #f4f7f8;
  text-align: left;
}

.battle-final-card li span,
.battle-final-card li strong,
.battle-final-card li em {
  font-weight: 950;
}

.battle-final-card li span {
  color: var(--accent-dark);
  font-size: 12px;
}

.battle-final-card li em {
  color: #3b2a0c;
  font-style: normal;
  font-variant-numeric: tabular-nums;
}

.battle-final-card button {
  height: 48px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 950;
}

.reward-reveal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(16, 23, 36, 0.62);
}

.reward-reveal[hidden] {
  display: none;
}

.reward-card {
  width: min(100%, 340px);
  padding: 22px 18px 18px;
  border-radius: 8px;
  display: grid;
  justify-items: center;
  gap: 12px;
  background: #fff;
  color: var(--ink);
  text-align: center;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  animation: reward-pop 240ms ease-out both;
}

.reward-kicker {
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 900;
}

.reward-shell {
  position: relative;
  width: 132px;
  height: 132px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.28), transparent 44%),
    #9aa3ad;
  box-shadow:
    inset 0 -8px 0 rgba(0, 0, 0, 0.14),
    0 18px 34px rgba(23, 32, 51, 0.24);
  overflow: hidden;
}

.reward-swatch {
  width: 86px;
  height: 60px;
  border-radius: 8px;
  opacity: 0;
  transform: scale(0.76);
  box-shadow: inset 0 -8px 0 rgba(0, 0, 0, 0.14);
}

.reward-shell.breaking {
  animation: shell-shake 680ms ease-in-out both;
}

.reward-shell.breaking::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(108deg, transparent 0 38%, rgba(255, 255, 255, 0.8) 39% 41%, transparent 42%),
    linear-gradient(36deg, transparent 0 48%, rgba(255, 255, 255, 0.72) 49% 51%, transparent 52%);
  animation: shell-break 1050ms ease-out forwards;
}

.reward-shell.breaking .reward-swatch {
  animation: swatch-reveal 1050ms ease-out 560ms forwards;
}

.reward-crack {
  position: absolute;
  width: 3px;
  height: 0;
  border-radius: 999px;
  background: rgba(67, 75, 87, 0.72);
  transform-origin: top;
}

.crack-a {
  left: 44%;
  top: 18%;
  transform: rotate(-24deg);
}

.crack-b {
  right: 34%;
  top: 35%;
  transform: rotate(31deg);
}

.crack-c {
  left: 34%;
  bottom: 24%;
  transform: rotate(42deg);
}

.reward-shell.breaking .crack-a {
  animation: crack-grow 520ms ease-out 140ms forwards;
}

.reward-shell.breaking .crack-b {
  animation: crack-grow 520ms ease-out 280ms forwards;
}

.reward-shell.breaking .crack-c {
  animation: crack-grow 520ms ease-out 420ms forwards;
}

.reward-card h2 {
  margin: 0;
  font-size: 25px;
}

.reward-card p {
  margin: -4px 0 0;
  color: var(--muted);
  font-weight: 800;
}

.reward-actions {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.reward-actions button {
  height: 48px;
  border-radius: 8px;
  font-weight: 900;
}

.reward-apply {
  background: var(--accent);
  color: #fff;
}

.reward-later {
  background: #eef2f6;
  color: var(--ink);
}

@keyframes sheet-up {
  from {
    transform: translateY(100%);
  }

  to {
    transform: translateY(0);
  }
}

@keyframes tumble {
  0% {
    translate: 0 -8px;
    rotate: -8deg;
  }

  100% {
    translate: 0 8px;
    rotate: 12deg;
  }
}

@keyframes reward-pop {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.96);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes crack-grow {
  to {
    height: 44px;
  }
}

@keyframes shell-shake {
  0%,
  100% {
    transform: translateX(0) rotate(0deg);
  }

  22% {
    transform: translateX(-4px) rotate(-2deg);
  }

  44% {
    transform: translateX(4px) rotate(2deg);
  }

  66% {
    transform: translateX(-3px) rotate(-1deg);
  }
}

@keyframes shell-break {
  0%,
  58% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}

@keyframes swatch-reveal {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes countdown-pop {
  from {
    opacity: 0;
    transform: scale(0.72);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes roll-bounce {
  0% {
    opacity: 0;
    transform: translate(var(--x0), var(--y0)) rotate(-120deg) scale(0.86);
  }

  24% {
    opacity: 1;
    transform: translate(var(--x1), var(--y1)) rotate(120deg) scale(1.04);
  }

  52% {
    transform: translate(var(--x2), var(--y2)) rotate(var(--spin)) scale(0.96);
  }

  76% {
    transform: translate(var(--x1), var(--y3)) rotate(var(--spin-back)) scale(1);
  }

  100% {
    opacity: 1;
    transform: translate(var(--x3), var(--y3)) rotate(0deg) scale(1);
  }
}

@media (max-width: 430px) {
  .online-screen {
    padding-inline: 12px;
  }

  .online-screen .game-header {
    grid-template-columns: 46px minmax(0, 1fr) 68px;
    gap: 7px;
  }

  .online-screen .game-title strong {
    font-size: 25px;
  }

  .online-screen .game-title span {
    font-size: 11px;
  }

  .online-screen .back-button {
    height: 40px;
  }

  .leave-room-button {
    width: 68px;
    height: 40px;
    font-size: 12px;
  }

  .battle-round-panel {
    padding: 8px;
  }

  .battle-time-row {
    padding: 7px 8px;
  }

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

  .battle-party-panel {
    padding: 8px;
  }

  .battle-party-title {
    display: none;
  }

  .battle-status-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .party-member {
    min-height: 46px;
    grid-template-columns: 54px minmax(0, 1fr) auto;
  }

  .party-avatar {
    width: 54px;
    height: 28px;
  }

  .battle-problem-card {
    padding: 8px;
  }

  .battle-target-dice {
    gap: 6px;
  }

  .battle-target-dice .game-die.black {
    width: 42px;
    height: 42px;
    font-size: 23px;
  }

  .battle-target-dice strong {
    min-width: 76px;
    height: 36px;
    font-size: 13px;
  }

  .battle-dice-row {
    gap: 6px;
  }

  .battle-dice-row .game-die {
    height: 40px;
    font-size: 19px;
  }

  .battle-expression-input {
    height: 118px;
    min-height: 118px;
    padding: 7px;
    gap: 3px;
  }

  .battle-expression-input .expression-token {
    min-width: 30px;
    height: 34px;
    font-size: 19px;
  }

  .board-felt {
    height: 200px;
  }

  .game-felt {
    min-height: 390px;
  }

  .game-die {
    height: 48px;
    font-size: 22px;
  }

  .home-header h1 {
    font-size: 29px;
  }

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