:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-deep: #040a13;
  --panel: rgba(15, 30, 51, 0.76);
  --panel-strong: rgba(19, 38, 63, 0.94);
  --line: rgba(157, 190, 218, 0.16);
  --line-bright: rgba(174, 209, 239, 0.28);
  --text: #eef7ff;
  --muted: #8da6bb;
  --cyan: #55e8ff;
  --orange: #ff9b63;
  --violet: #a987ff;
  --green: #60e6ad;
  --danger: #ff6f7d;
  --radius: 22px;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 12%, rgba(40, 120, 164, 0.18), transparent 28%),
    radial-gradient(circle at 85% 18%, rgba(112, 73, 177, 0.13), transparent 24%),
    linear-gradient(145deg, var(--bg-deep), var(--bg) 55%, #09182a);
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 82%);
}
button { font: inherit; }
.app-shell {
  width: min(1500px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 32px;
}
.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 68px;
  padding: 10px 12px 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(7, 19, 33, 0.7);
  backdrop-filter: blur(16px);
  box-shadow: 0 16px 50px rgba(0,0,0,.16);
}
.brand-mark {
  position: relative;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border: 1px solid rgba(85, 232, 255, .4);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(85,232,255,.24), transparent 62%);
  box-shadow: inset 0 0 18px rgba(85,232,255,.15), 0 0 18px rgba(85,232,255,.08);
}
.brand-mark::before, .brand-mark::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  top: 20px;
  border-top: 1px solid rgba(85, 232, 255, .55);
  transform: rotate(28deg);
}
.brand-mark::after { transform: rotate(-28deg); }
.brand-mark span, .brand-mark i {
  position: absolute;
  top: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.brand-mark span { left: 6px; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.brand-mark i { right: 6px; background: var(--orange); box-shadow: 0 0 10px var(--orange); }
.brand-copy h1, .brand-copy p, .section-heading h2, .section-heading p,
.fighter-heading h2, .modal-card h2, .modal-card p { margin: 0; }
.brand-copy h1 { font-size: 17px; letter-spacing: 0; font-weight: 700; }
.brand-copy p { margin-top: 3px; color: var(--muted); font-size: 12px; }
.eyebrow {
  display: block;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}
.top-status { margin-left: auto; min-width: 104px; padding-right: 12px; text-align: right; }
.top-status strong { display: block; margin-top: 3px; font-size: 13px; }
.icon-button {
  width: 40px;
  height: 40px;
  color: var(--text);
  border: 1px solid var(--line-bright);
  border-radius: 8px;
  background: rgba(255,255,255,.035);
  cursor: pointer;
}
.icon-button:hover { background: rgba(255,255,255,.08); }
main { margin-top: 18px; }
.hand-section, .arena-panel, .fighter-panel, .console-strip {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 18px 54px rgba(0,0,0,.16);
  backdrop-filter: blur(14px);
}
.hand-section {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
  padding: 16px;
  border-radius: var(--radius);
}
.section-heading { align-self: center; padding-left: 4px; }
.section-heading h2 { margin-top: 5px; font-size: 18px; }
.section-heading p { margin-top: 7px; color: var(--muted); font-size: 12px; line-height: 1.55; }
.hand-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  min-height: 114px;
}
.card-choice {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 22px;
  gap: 12px;
  align-items: center;
  min-width: 0;
  padding: 14px;
  color: var(--text);
  text-align: left;
  border: 1px solid color-mix(in srgb, var(--card-color) 34%, var(--line));
  border-radius: 8px;
  background: radial-gradient(circle at 0 0, color-mix(in srgb, var(--card-color) 14%, transparent), transparent 50%), rgba(10, 24, 41, .82);
  overflow: hidden;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.card-choice::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 2px;
  background: var(--card-color);
  box-shadow: 0 0 14px var(--card-color);
}
.card-choice:hover:not(:disabled) {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--card-color) 65%, transparent);
  background: radial-gradient(circle at 0 0, color-mix(in srgb, var(--card-color) 22%, transparent), transparent 54%), rgba(14, 32, 53, .95);
}
.card-choice:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
.card-choice:disabled { cursor: default; opacity: .5; }
.card-choice.is-used { opacity: .22; transform: scale(.985); }
.card-choice.cpu-back { cursor: default; }
.card-choice.cpu-back .card-symbol { color: var(--orange); }
.card-symbol {
  display: grid;
  place-items: center;
  width: 50px;
  height: 58px;
  color: var(--card-color);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 22px;
  font-weight: 700;
  border: 1px solid color-mix(in srgb, var(--card-color) 30%, transparent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--card-color) 9%, transparent);
}
.card-copy { min-width: 0; }
.card-copy strong { display: block; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-copy small { display: block; margin-top: 5px; color: var(--muted); font-size: 11px; line-height: 1.45; }
.card-arrow { color: var(--card-color); font-size: 18px; text-align: center; }
.duel-layout {
  display: grid;
  grid-template-columns: 196px minmax(0, 1fr) 196px;
  gap: 14px;
  margin-top: 14px;
  align-items: stretch;
}
.fighter-panel { position: relative; align-self: stretch; padding: 18px; border-radius: var(--radius); overflow: hidden; }
.fighter-panel::after {
  content: "";
  position: absolute;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  filter: blur(1px);
  pointer-events: none;
  opacity: .13;
}
.fighter-player::after { left: -60px; bottom: -50px; background: var(--cyan); }
.fighter-cpu::after { right: -60px; bottom: -50px; background: var(--orange); }
.fighter-heading { display: flex; align-items: center; gap: 11px; padding-bottom: 15px; border-bottom: 1px solid var(--line); }
.fighter-heading h2 { margin-top: 3px; font-size: 20px; }
.fighter-dot { width: 14px; height: 14px; flex: 0 0 auto; border-radius: 50%; }
.fighter-player .fighter-dot { background: var(--cyan); box-shadow: 0 0 16px var(--cyan); }
.fighter-cpu .fighter-dot { background: var(--orange); box-shadow: 0 0 16px var(--orange); }
.fighter-stats { margin: 10px 0 0; }
.fighter-stats div { display: flex; justify-content: space-between; gap: 8px; padding: 9px 0; border-bottom: 1px solid rgba(157,190,218,.08); }
.fighter-stats dt { color: var(--muted); font-size: 11px; }
.fighter-stats dd { margin: 0; font-size: 11px; font-weight: 700; font-variant-numeric: tabular-nums; }
.energy-bar { height: 4px; margin-top: 18px; border-radius: 4px; background: rgba(255,255,255,.07); overflow: hidden; }
.energy-bar span { display: block; width: 0; height: 100%; border-radius: inherit; transition: width .15s ease; }
.fighter-player .energy-bar span { background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.fighter-cpu .energy-bar span { background: var(--orange); box-shadow: 0 0 10px var(--orange); }
.energy-label { display: flex; justify-content: space-between; margin: 8px 0 0; color: var(--muted); font-size: 10px; }
.energy-label strong { color: var(--text); font-variant-numeric: tabular-nums; }
.arena-panel { min-width: 0; border-radius: var(--radius); padding: 12px; }
.arena-hud { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 2px 5px 10px; }
.turn-signal { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.turn-signal span { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); }
.turn-signal span.is-live { background: var(--green); box-shadow: 0 0 12px var(--green); }
.turn-signal span.is-resolving { background: var(--violet); box-shadow: 0 0 12px var(--violet); animation: pulse 1s infinite; }
.sim-rate { display: flex; align-items: baseline; gap: 7px; color: var(--muted); font-size: 10px; }
.sim-rate strong { color: var(--text); font-size: 11px; }
.canvas-wrap {
  position: relative;
  overflow: hidden;
  min-height: 420px;
  border: 1px solid rgba(157,190,218,.12);
  border-radius: 8px;
  background: radial-gradient(ellipse at center 60%, rgba(45, 116, 140, .13), transparent 52%), linear-gradient(180deg, rgba(4,11,20,.86), rgba(7,19,32,.72));
}
.canvas-wrap::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, transparent 49.8%, rgba(157,190,218,.045) 50%, transparent 50.2%), linear-gradient(transparent 49.8%, rgba(157,190,218,.04) 50%, transparent 50.2%);
}
#arenaCanvas { display: block; width: 100%; height: 100%; min-height: 420px; }
.motion-readout {
  position: absolute;
  left: 14px;
  bottom: 12px;
  padding: 6px 9px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(4,11,20,.65);
  backdrop-filter: blur(8px);
}
.arena-scale { display: flex; align-items: center; justify-content: center; gap: 8px; padding-top: 9px; color: var(--muted); font-size: 9px; }
.arena-scale i { width: 68px; height: 5px; border-left: 1px solid var(--muted); border-right: 1px solid var(--muted); border-bottom: 1px solid var(--muted); }
.console-strip { display: grid; grid-template-columns: 1.05fr 1.35fr 1fr; margin-top: 14px; border-radius: var(--radius); overflow: hidden; }
.console-block { min-width: 0; padding: 16px 18px; }
.console-block + .console-block { border-left: 1px solid var(--line); }
.turn-console strong { display: block; margin-top: 6px; font-size: 13px; }
.turn-console p { margin: 5px 0 0; color: var(--muted); font-size: 11px; line-height: 1.45; }
.env-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px 18px; margin-top: 8px; }
.env-grid span { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font-size: 10px; }
.env-grid strong { color: var(--text); font-weight: 700; font-variant-numeric: tabular-nums; }
.log-console ol { margin: 7px 0 0; padding: 0; list-style: none; }
.log-console li { color: var(--muted); font-size: 10px; line-height: 1.5; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.log-console li:first-child { color: var(--text); }
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: none;
  place-items: center;
  padding: 22px;
  background: rgba(1,6,12,.78);
  backdrop-filter: blur(16px);
}
.modal-backdrop.is-open { display: grid; }
.modal-card {
  width: min(680px, 100%);
  max-height: calc(100vh - 44px);
  overflow: auto;
  padding: 30px;
  border: 1px solid var(--line-bright);
  border-radius: 12px;
  background: radial-gradient(circle at 10% 0, rgba(85,232,255,.13), transparent 34%), var(--panel-strong);
  box-shadow: 0 35px 100px rgba(0,0,0,.46);
}
.modal-card h2 { margin-top: 8px; font-size: 34px; letter-spacing: 0; }
.modal-lead { margin-top: 14px !important; color: #b5c8d8; font-size: 13px; line-height: 1.75; }
.rule-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 22px; }
.rule-grid div { padding: 8px 12px; border-left: 1px solid var(--line); background: transparent; }
.rule-grid div:first-child { border-left: 0; }
.rule-grid span { display: block; color: var(--cyan); font-family: Georgia, serif; font-size: 18px; }
.rule-grid strong { display: block; margin-top: 8px; font-size: 13px; }
.rule-grid small { display: block; margin-top: 4px; color: var(--muted); font-size: 9px; }
.physics-note { margin-top: 14px; padding: 14px 16px; border-left: 2px solid var(--violet); background: rgba(169,135,255,.07); }
.physics-note strong { font-size: 11px; }
.physics-note p { margin-top: 5px; color: var(--muted); font-size: 10px; line-height: 1.65; }
.primary-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  margin-top: 18px;
  padding: 14px 18px;
  color: #03141a;
  font-weight: 800;
  border: 0;
  border-radius: 8px;
  background: linear-gradient(120deg, #7ff1ff, #55e8ff);
  box-shadow: 0 12px 30px rgba(85,232,255,.18);
  cursor: pointer;
}
.primary-button:hover { filter: brightness(1.08); }
.primary-button span { font-size: 18px; }
.result-card { width: min(470px, 100%); text-align: center; }
.result-kicker { color: var(--green); font-size: 11px; font-weight: 800; letter-spacing: 0; }
.result-card p { margin-top: 10px; color: var(--muted); font-size: 13px; }
.result-data { display: flex; justify-content: space-between; margin-top: 22px; padding: 14px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.result-data strong { color: var(--text); }
@keyframes pulse { 50% { opacity: .4; transform: scale(.72); } }
@keyframes cpu-alert-pulse {
  0% { filter: brightness(1.7); }
  100% { filter: brightness(1); }
}
@keyframes cpu-alert-countdown { to { transform: scaleX(0); } }
@media (prefers-reduced-motion: reduce) {
  .cpu-card-alert, .cpu-card-alert.is-visible { transition: none; animation: none; }
  .cpu-card-alert.is-visible .cpu-alert-timer i { animation-timing-function: steps(6, end); }
}
@media (max-width: 1120px) {
  .duel-layout { grid-template-columns: 160px minmax(0, 1fr) 160px; }
  .fighter-panel { padding: 15px; }
  .fighter-stats div { display: block; }
  .fighter-stats dd { margin-top: 4px; display: block; }
  .hand-section { grid-template-columns: 170px minmax(0,1fr); }
  .card-choice { grid-template-columns: 44px minmax(0,1fr); padding: 11px; }
  .card-symbol { width: 43px; height: 52px; font-size: 19px; }
  .card-arrow { display: none; }
}
@media (max-width: 840px) {
  .app-shell { width: min(100% - 20px, 720px); padding-top: 10px; }
  .hand-section { grid-template-columns: 1fr; }
  .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 12px; }
  .section-heading p { max-width: 260px; text-align: right; }
  .hand-grid { grid-template-columns: 1fr; min-height: auto; }
  .card-choice { grid-template-columns: 48px minmax(0,1fr) 22px; }
  .card-arrow { display: block; }
  .duel-layout { grid-template-columns: 1fr 1fr; }
  .arena-panel { grid-column: 1 / -1; grid-row: 1; }
  .fighter-panel { grid-row: 2; }
  .fighter-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
  .fighter-stats div { display: flex; }
  .fighter-stats dd { display: initial; margin-top: 0; }
  .canvas-wrap, #arenaCanvas { min-height: 390px; }
  .console-strip { grid-template-columns: 1fr; }
  .console-block + .console-block { border-left: 0; border-top: 1px solid var(--line); }
}
@media (max-width: 560px) {
  .brand-copy p { display: none; }
  .top-status { min-width: 74px; padding-right: 4px; }
  .hand-section { padding: 12px; }
  .section-heading { display: block; }
  .section-heading p { max-width: none; text-align: left; }
  .duel-layout { gap: 10px; }
  .fighter-panel { padding: 12px; }
  .fighter-stats { display: block; }
  .fighter-stats div { display: flex; }
  .fighter-heading { padding-bottom: 10px; }
  .canvas-wrap, #arenaCanvas { min-height: 330px; }
  .rule-grid { grid-template-columns: 1fr 1fr; }
  .modal-card { padding: 22px; }
  .modal-card h2 { font-size: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}



.force-readout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid rgba(157,190,218,.08);
}
.force-readout span {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--muted);
  font-size: 9px;
}
.force-readout strong {
  color: var(--text);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
.action-banner {
  position: absolute;
  top: 14px;
  left: 50%;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 220px;
  max-width: calc(100% - 28px);
  padding: 8px 11px;
  color: var(--text);
  border: 1px solid rgba(85,232,255,.34);
  border-radius: 8px;
  background: rgba(4,14,25,.84);
  box-shadow: 0 10px 26px rgba(0,0,0,.2), 0 0 18px rgba(85,232,255,.08);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -8px);
  transition: opacity .2s ease, transform .2s ease, border-color .2s ease;
}
.action-banner.is-visible { opacity: 1; transform: translate(-50%, 0); }
.action-banner.is-hot { border-color: rgba(255,155,99,.58); box-shadow: 0 10px 26px rgba(0,0,0,.22), 0 0 22px rgba(255,155,99,.16); }
.action-glyph {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  color: var(--cyan);
  font-family: Georgia, serif;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid rgba(85,232,255,.34);
  border-radius: 6px;
  background: rgba(85,232,255,.1);
}
.action-banner.is-hot .action-glyph { color: var(--orange); border-color: rgba(255,155,99,.46); background: rgba(255,155,99,.1); }
.action-banner strong, .action-banner small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.action-banner strong { font-size: 11px; }
.action-banner small { margin-top: 2px; color: var(--muted); font-size: 9px; }
.cpu-card-alert {
  --cpu-card-color: var(--orange);
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 5;
  width: min(330px, calc(100% - 32px));
  padding: 16px;
  color: var(--text);
  border: 1px solid color-mix(in srgb, var(--cpu-card-color) 72%, transparent);
  border-radius: 8px;
  background: rgba(5, 13, 23, .94);
  box-shadow: 0 22px 70px rgba(0, 0, 0, .55), 0 0 34px color-mix(in srgb, var(--cpu-card-color) 24%, transparent);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transform: translate(-50%, -46%) scale(.94);
  transition: opacity .2s ease, transform .2s ease, visibility 0s linear .2s;
}
.cpu-card-alert.is-visible {
  visibility: visible;
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  transition-delay: 0s;
  animation: cpu-alert-pulse .72s ease-out 1;
}
.cpu-alert-kicker {
  display: block;
  margin-bottom: 10px;
  color: var(--cpu-card-color);
  font-size: 11px;
  font-weight: 800;
}
.cpu-alert-card { display: flex; align-items: center; gap: 13px; min-width: 0; }
.cpu-alert-glyph {
  display: grid;
  place-items: center;
  width: 52px;
  height: 58px;
  flex: 0 0 auto;
  color: var(--cpu-card-color);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 21px;
  font-weight: 700;
  border: 1px solid color-mix(in srgb, var(--cpu-card-color) 55%, transparent);
  border-radius: 6px;
  background: color-mix(in srgb, var(--cpu-card-color) 12%, transparent);
}
.cpu-alert-copy { min-width: 0; }
.cpu-alert-copy strong, .cpu-alert-copy small { display: block; }
.cpu-alert-copy strong { font-size: 20px; }
.cpu-alert-copy small { margin-top: 6px; color: var(--muted); font-size: 10px; line-height: 1.5; }
.cpu-alert-timer {
  display: block;
  height: 3px;
  margin-top: 14px;
  overflow: hidden;
  background: rgba(255, 255, 255, .08);
}
.cpu-alert-timer i { display: block; width: 100%; height: 100%; background: var(--cpu-card-color); transform-origin: left; }
.cpu-card-alert.is-visible .cpu-alert-timer i { animation: cpu-alert-countdown 3s linear forwards; }
.force-legend {
  position: absolute;
  right: 14px;
  bottom: 12px;
  display: flex;
  gap: 10px;
  color: var(--muted);
  font-size: 9px;
}
.force-legend span { display: inline-flex; align-items: center; gap: 4px; }
.force-legend span::before { content: ""; width: 12px; height: 2px; border-radius: 2px; background: currentColor; }
.legend-force { color: #69a9ff; }
.legend-friction { color: #ff9b63; }
@media (max-width: 560px) {
  .force-readout { gap: 5px; }
  .action-banner { min-width: 180px; }
}