:root {
  --ink: #17141b;
  --paper: #f5e9cf;
  --paper-dark: #d7c6a4;
  --table: #29212d;
  --table-light: #3b2d3d;
  --red: #ef4b44;
  --red-dark: #9d252d;
  --gold: #f3bd44;
  --cyan: #65d9d2;
  --green: #8bcf69;
  --white: #fffaf0;
  --shadow: #0e0b11;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: Impact, Haettenschweiler, "Arial Narrow Bold", "Franklin Gothic Condensed", sans-serif;
  overscroll-behavior: none;
}

body {
  min-height: 100dvh;
  overflow-x: hidden;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.game-shell {
  width: min(100%, 760px);
  min-height: 100dvh;
  margin: 0 auto;
  background: var(--table);
  box-shadow: 0 0 60px #0009;
}

.topbar {
  height: 58px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: max(8px, env(safe-area-inset-top)) 14px 8px;
  border-bottom: 3px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  position: relative;
  z-index: 20;
}

.home-link {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 3px solid currentColor;
  color: inherit;
  text-decoration: none;
  font: 900 14px/1 Arial, sans-serif;
  transform: rotate(-3deg);
}

.wordmark {
  text-align: center;
  line-height: 0.82;
  letter-spacing: 0.08em;
  transform: rotate(-1deg);
}

.wordmark span {
  display: block;
  font-size: 11px;
}

.wordmark strong {
  font-size: 22px;
}

.text-button {
  justify-self: end;
  padding: 8px 0 8px 10px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: 900 12px/1 Arial, sans-serif;
  cursor: pointer;
}

.duel-table {
  min-height: calc(100dvh - 58px);
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 50% 9%, #65424a 0 1px, transparent 2px),
    repeating-linear-gradient(84deg, transparent 0 82px, #ffffff05 83px 85px),
    linear-gradient(160deg, var(--table-light), var(--table) 55%, #201a24);
}

.duel-table::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  background: repeating-linear-gradient(0deg, transparent 0 6px, #0002 7px 8px);
  pointer-events: none;
}

.monster-zone {
  height: clamp(154px, 23dvh, 210px);
  min-height: 154px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 2px solid #130f16;
  background: linear-gradient(#16121b, #241a26 75%, #19151c);
}

.side-label {
  position: absolute;
  top: 10px;
  left: 13px;
  padding: 4px 7px;
  background: var(--red);
  color: var(--ink);
  font: 900 10px/1 Arial, sans-serif;
  letter-spacing: 0.12em;
  transform: rotate(-2deg);
}

.monster-frame {
  width: clamp(138px, 24dvh, 190px);
  height: clamp(126px, 21dvh, 180px);
  position: relative;
  display: grid;
  place-items: center;
  align-self: end;
}

.monster-aura {
  position: absolute;
  width: 112%;
  aspect-ratio: 1;
  border-radius: 50%;
  opacity: 0.75;
  background: repeating-conic-gradient(from 8deg, var(--red) 0 5deg, transparent 6deg 14deg);
  mask-image: radial-gradient(circle, transparent 0 45%, #000 47% 62%, transparent 65%);
  animation: breathe 3.6s ease-in-out infinite;
}

.monster {
  width: 100%;
  height: 100%;
  position: relative;
  object-fit: contain;
  transform-origin: 50% 85%;
  filter: drop-shadow(0 10px 0 #0b090d);
}

.monster-frame.thinking .monster {
  animation: monster-think 650ms ease-in-out infinite alternate;
}

.monster-frame.hit .monster {
  animation: monster-hit 430ms steps(2);
}

.monster-hole {
  width: 17px;
  height: 17px;
  position: absolute;
  top: 31%;
  left: 50%;
  z-index: 3;
  border: 4px solid #0c0910;
  border-radius: 50%;
  opacity: 0;
  transform: translate(-50%, -50%) scale(2);
  background: var(--red-dark);
  box-shadow: 0 0 0 5px #f3bd4444;
}

.monster-frame.defeated .monster-hole {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  transition: 140ms ease-out;
}

.monster-frame.defeated .monster {
  animation: monster-defeat 1.5s steps(2) forwards;
}

.hud {
  display: flex;
  gap: 6px;
}

.hud-monster {
  position: absolute;
  top: 38px;
  right: 12px;
  flex-direction: column;
}

.stat {
  min-width: 76px;
  height: 34px;
  display: grid;
  grid-template-columns: 25px 1fr auto;
  align-items: center;
  gap: 4px;
  padding: 3px 7px 3px 4px;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 3px 3px 0 var(--shadow);
  transform: rotate(0.4deg);
}

.stat:nth-child(2) {
  transform: rotate(-0.8deg);
}

.stat img {
  width: 24px;
  height: 24px;
}

.stat span {
  font: 900 9px/1 Arial, sans-serif;
  letter-spacing: 0.04em;
}

.stat strong {
  min-width: 12px;
  font-size: 19px;
  text-align: right;
}

.stat.pulse {
  animation: stat-pulse 420ms ease-out;
}

.stat.shatter {
  animation: shield-shatter 520ms ease-out;
}

.turn-strip {
  min-height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 7px 12px;
  border-block: 2px solid #0f0c12;
  background: var(--gold);
  color: var(--ink);
  text-align: center;
  transition: background 180ms;
}

.turn-strip.monster-turn {
  background: var(--red);
}

.turn-pip {
  width: 10px;
  height: 10px;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 3px #ffffff55;
}

.turn-strip strong {
  letter-spacing: 0.08em;
}

.turn-strip span:last-child {
  font: 700 12px/1.1 Arial, sans-serif;
  opacity: 0.75;
}

.board-wrap {
  flex: 1 1 auto;
  min-height: 330px;
  position: relative;
  display: grid;
  place-items: center;
  padding: clamp(10px, 1.8dvh, 18px) 14px;
}

.board {
  width: min(100%, 440px);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(6px, 1.2dvh, 10px);
  perspective: 900px;
}

.card {
  min-width: 0;
  aspect-ratio: 1.18 / 1;
  position: relative;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  perspective: 600px;
}

.card:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

.card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  display: block;
  transform-style: preserve-3d;
  transition: transform 260ms cubic-bezier(0.2, 0.75, 0.3, 1.2);
}

.card-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 3px solid var(--ink);
  border-radius: 6px;
  backface-visibility: hidden;
  box-shadow: 4px 5px 0 #100c13;
}

.card-back {
  background: var(--red-dark);
}

.card-back img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-front {
  transform: rotateY(180deg);
  background: var(--paper);
}

.card-front::after {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid #201b22;
  border-radius: 3px;
  opacity: 0.25;
}

.card-front img {
  width: 62%;
  height: 62%;
  object-fit: contain;
  filter: drop-shadow(2px 3px 0 #1b172044);
}

.card.revealed .card-inner,
.card.peeked .card-inner {
  transform: rotateY(180deg);
}

.card.ai-choice .card-face {
  box-shadow: 0 0 0 3px var(--red), 4px 5px 0 #100c13;
}

.card.matched {
  pointer-events: none;
  animation: card-match 560ms ease-in forwards;
}

.card.removed {
  visibility: hidden;
  pointer-events: none;
}

.board.locked .card {
  cursor: default;
}

.effect-copy {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 8;
  opacity: 0;
  pointer-events: none;
  padding: 8px 14px;
  border: 3px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 6px 7px 0 var(--shadow);
  font-size: clamp(23px, 6vw, 42px);
  letter-spacing: 0.04em;
  white-space: nowrap;
  transform: translate(-50%, -35%) rotate(-3deg) scale(0.5);
}

.effect-copy.show {
  animation: effect-pop 850ms ease-out;
}

.player-zone {
  min-height: 98px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 11px max(13px, env(safe-area-inset-right)) max(11px, env(safe-area-inset-bottom)) max(13px, env(safe-area-inset-left));
  border-top: 3px solid var(--ink);
  background: #19151d;
}

.hud-player {
  flex-wrap: wrap;
  justify-content: center;
}

.hud-player .stat {
  min-width: 80px;
}

.shoot-button {
  min-width: 142px;
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 8px 13px;
  border: 3px solid var(--paper);
  border-radius: 3px;
  background: var(--red);
  color: var(--ink);
  box-shadow: 5px 6px 0 #000;
  cursor: pointer;
  transform: rotate(-1deg);
  transition: transform 100ms, filter 100ms;
}

.shoot-button:hover:not(:disabled) {
  filter: brightness(1.15);
  transform: rotate(-1deg) translateY(-2px);
}

.shoot-button:active:not(:disabled) {
  transform: rotate(-1deg) translate(3px, 3px);
  box-shadow: 2px 3px 0 #000;
}

.shoot-button:disabled {
  opacity: 0.38;
  cursor: not-allowed;
  filter: grayscale(0.7);
}

.shoot-icon {
  font-size: 30px;
}

.shoot-button strong,
.shoot-button small {
  display: block;
}

.shoot-button strong {
  font-size: 23px;
  letter-spacing: 0.08em;
}

.shoot-button small {
  font: 900 9px/1 Arial, sans-serif;
}

.shot-line {
  width: 12px;
  height: 65%;
  position: absolute;
  left: 50%;
  bottom: 8%;
  z-index: 25;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%);
  transform-origin: bottom;
  background: linear-gradient(90deg, transparent, #fff, var(--gold), transparent);
  filter: blur(1px) drop-shadow(0 0 12px #fff);
}

.duel-table.shooting-up .shot-line {
  animation: shot-up 210ms ease-out;
}

.duel-table.shooting-down .shot-line {
  transform-origin: top;
  animation: shot-down 210ms ease-out;
}

.impact-hole {
  width: 34px;
  height: 34px;
  position: absolute;
  top: 48%;
  left: 50%;
  z-index: 31;
  opacity: 0;
  pointer-events: none;
  border: 9px solid #09070a;
  border-radius: 50%;
  background: #4d1117;
  box-shadow: 0 0 0 5px #eee2cb, 0 0 0 9px #161117;
  transform: translate(-50%, -50%) scale(3);
}

.impact-hole.show {
  animation: impact-appear 350ms ease-out forwards;
}

.curtain {
  position: absolute;
  inset: 0;
  z-index: 30;
  pointer-events: none;
  overflow: hidden;
  transform: translateY(-103%);
  background:
    linear-gradient(180deg, rgba(181, 25, 43, 0.48), rgba(103, 8, 27, 0.68)),
    repeating-linear-gradient(96deg, rgba(255, 137, 128, 0.08) 0 7%, rgba(73, 0, 17, 0.12) 8% 14%, transparent 15% 20%);
  border-bottom: 6px solid rgba(76, 6, 22, 0.72);
  box-shadow: 0 8px 24px #2c020a66;
}

.curtain span {
  position: absolute;
  inset: 0;
  opacity: 0.75;
  background:
    radial-gradient(circle at 22% 18%, rgba(255, 231, 208, 0.15) 0 1px, transparent 2px) 0 0 / 19px 23px,
    repeating-linear-gradient(7deg, transparent 0 6px, rgba(255, 237, 218, 0.035) 7px, transparent 8px),
    radial-gradient(ellipse at 50% 45%, transparent 0 24%, rgba(45, 0, 10, 0.3) 76%);
  mix-blend-mode: overlay;
}

.curtain.drop {
  animation: curtain-drop 920ms cubic-bezier(0.65, 0, 0.38, 1) forwards;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 18px;
  visibility: hidden;
  opacity: 0;
  background: #0e0a10d9;
  backdrop-filter: blur(7px);
  transition: opacity 180ms, visibility 180ms;
}

.modal-backdrop.visible {
  visibility: visible;
  opacity: 1;
}

.modal {
  width: calc(100vw - 36px);
  max-width: 440px;
  max-height: calc(100dvh - 36px);
  overflow-y: auto;
  padding: 24px clamp(20px, 6vw, 36px) 20px;
  border: 4px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 10px 12px 0 #000;
  text-align: center;
  transform: rotate(-0.5deg);
}

.modal-kicker {
  display: inline-block;
  margin: 0 0 8px;
  padding: 5px 8px;
  background: var(--red);
  font: 900 11px/1 Arial, sans-serif;
  letter-spacing: 0.12em;
}

.modal h1 {
  margin: 0;
  font-size: clamp(46px, 13vw, 72px);
  line-height: 0.78;
  letter-spacing: -0.025em;
  text-transform: uppercase;
}

.modal-copy {
  max-width: 360px;
  margin: 19px auto 16px;
  font: 700 14px/1.35 Arial, sans-serif;
}

.mini-rules {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  margin-bottom: 18px;
  text-align: left;
}

.mini-rules div {
  min-height: 43px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px;
  border: 2px solid var(--ink);
  background: #fff9e9;
}

.mini-rules div:last-child {
  grid-column: 1 / -1;
}

.mini-rules img {
  width: 29px;
  height: 29px;
}

.mini-rules span,
.mini-rules strong {
  display: block;
  font: 700 11px/1.16 Arial, sans-serif;
}

.mini-rules strong {
  text-transform: uppercase;
}

.start-button,
.secondary-button {
  width: 100%;
  min-height: 52px;
  border: 3px solid var(--ink);
  background: var(--red);
  color: var(--ink);
  box-shadow: 4px 5px 0 var(--ink);
  font-size: 19px;
  letter-spacing: 0.06em;
  cursor: pointer;
}

.start-button:active,
.secondary-button:active {
  transform: translate(3px, 3px);
  box-shadow: 1px 2px 0 var(--ink);
}

.secondary-button {
  margin-top: 10px;
  background: var(--cyan);
}

.seed-line {
  margin: 15px 0 0;
  font: 900 9px/1 Arial, sans-serif;
  letter-spacing: 0.12em;
  opacity: 0.52;
}

.hidden {
  display: none !important;
}

.game-shell.shake {
  animation: screen-shake 260ms steps(2);
}

@keyframes breathe {
  50% { transform: scale(1.05) rotate(3deg); opacity: 0.92; }
}

@keyframes monster-think {
  to { transform: translateY(-3px) rotate(1deg); }
}

@keyframes monster-hit {
  25% { transform: translate(-12px, 3px) rotate(-5deg); filter: brightness(4) drop-shadow(0 10px 0 #0b090d); }
  60% { transform: translate(8px, 0) rotate(4deg); }
}

@keyframes monster-defeat {
  0%, 18%, 34%, 55% { opacity: 1; filter: brightness(4) contrast(3); }
  10%, 28%, 45%, 75% { opacity: 0.15; filter: invert(1); }
  100% { opacity: 0; transform: translateY(18px) scaleY(0.2); }
}

@keyframes stat-pulse {
  40% { transform: scale(1.18) rotate(-3deg); background: var(--gold); }
}

@keyframes shield-shatter {
  35% { transform: scale(1.25) rotate(7deg); background: var(--cyan); filter: brightness(2); }
  70% { transform: scale(0.88) rotate(-5deg); }
}

@keyframes card-match {
  35% { transform: scale(1.14) rotate(3deg); filter: brightness(1.7); }
  100% { transform: translateY(-16px) scale(0.15) rotate(-9deg); opacity: 0; }
}

@keyframes effect-pop {
  0% { opacity: 0; transform: translate(-50%, -35%) rotate(-3deg) scale(0.5); }
  22%, 67% { opacity: 1; transform: translate(-50%, -50%) rotate(1deg) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -75%) rotate(3deg) scale(1.08); }
}

@keyframes shot-up {
  0% { opacity: 0; transform: translateX(-50%) scaleY(0); }
  35% { opacity: 1; }
  100% { opacity: 0; transform: translateX(-50%) scaleY(1); }
}

@keyframes shot-down {
  0% { opacity: 0; transform: translateX(-50%) scaleY(0) rotate(180deg); }
  35% { opacity: 1; }
  100% { opacity: 0; transform: translateX(-50%) scaleY(1) rotate(180deg); }
}

@keyframes impact-appear {
  60% { opacity: 1; transform: translate(-50%, -50%) scale(0.8); }
  100% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

@keyframes curtain-drop {
  70% { transform: translateY(0); }
  84% { transform: translateY(-2%); }
  100% { transform: translateY(0); }
}

@keyframes screen-shake {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(-6px, 4px); }
  50% { transform: translate(7px, -3px); }
  75% { transform: translate(-3px, -2px); }
}

@media (min-width: 620px) {
  .card {
    aspect-ratio: 1.3 / 1;
  }

  .hud-monster {
    right: 28px;
  }
}

@media (max-width: 540px) {
  .board {
    width: min(100%, 360px);
  }

  .player-zone {
    gap: 9px;
  }

  .hud-player {
    max-width: 174px;
  }

  .hud-player .stat {
    width: 82px;
    min-width: 0;
  }

  .hud-player .stat:last-child {
    width: 112px;
  }

  .shoot-button {
    min-width: 125px;
  }
}

@media (max-width: 360px) {
  .turn-strip span:last-child,
  .stat span {
    display: none;
  }

  .stat {
    min-width: 50px;
    grid-template-columns: 25px auto;
  }

  .hud-player {
    max-width: 122px;
  }

  .hud-player .stat,
  .hud-player .stat:last-child {
    width: 55px;
  }

  .board-wrap {
    padding-inline: 9px;
  }
}

@media (max-height: 820px) {
  .monster-zone {
    height: 154px;
  }

  .board-wrap {
    min-height: 0;
    padding-block: 8px;
  }

  .board {
    width: min(100%, 400px, calc((100dvh - 344px) * 0.84));
  }

  .player-zone {
    min-height: 86px;
    padding-block: 7px;
  }

  .shoot-button {
    min-height: 56px;
  }
}

@media (max-height: 700px) {
  .monster-zone {
    height: 125px;
    min-height: 125px;
  }

  .monster-frame {
    width: 130px;
    height: 118px;
  }

  .hud-monster {
    top: 28px;
  }

  .turn-strip {
    min-height: 40px;
    padding-block: 5px;
  }

  .player-zone {
    min-height: 80px;
    padding-block: 5px;
  }

  .board {
    width: min(100%, 360px, calc((100dvh - 303px) * 0.84));
    gap: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}