@import url("https://fonts.googleapis.com/css2?family=BIZ+UDMincho:wght@400;700&display=swap");

:root {
  --brass: #D4AF37;
  --brass-bright: #F2D272;
  --brass-dark: #9A7B1E;
  --bronze: #8C6D3F;
  --bronze-dark: #5C4427;
  --leather: #3E2723;
  --leather-dark: #241512;
  --leather-light: #5D4037;
  --green: #4A5D4E;
  --steam: #E8E4DA;
  --red: #C0392B;
  --ink: #FFF6DF;
  --font-mincho: "BIZ UDMincho", "MS Mincho", "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif CJK TC", "Songti TC", "PMingLiU", "PMingLiU-ExtB", "Times New Roman", serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; }

body {
  font-family: var(--font-mincho);
  color: var(--ink);
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(1200px 700px at 18% -10%, rgba(212, 175, 55, .16), transparent 62%),
    radial-gradient(1000px 800px at 108% 112%, rgba(74, 93, 78, .28), transparent 55%),
    linear-gradient(160deg, #6b4a2e 0%, var(--leather) 38%, #1d0f0c 100%);
  background-attachment: fixed;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 3;
  background: repeating-linear-gradient(0deg, rgba(0, 0, 0, .05) 0 1px, transparent 1px 3px);
  mix-blend-mode: multiply;
  opacity: .5;
}

::selection { background: var(--brass); color: #241512; }

::-webkit-scrollbar { width: 12px; }
::-webkit-scrollbar-track { background: var(--leather-dark); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brass), var(--bronze));
  border: 2px solid var(--leather-dark);
  border-radius: 6px;
}

#steamCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 2;
  pointer-events: none;
}

#gearField {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.bg-gear {
  position: absolute;
  filter: drop-shadow(0 0 10px rgba(212, 175, 55, .28));
  transition: filter .6s;
  will-change: transform;
}
.bg-gear path { fill: url(#brassGrad); stroke: #241512; stroke-width: 2; }

body.boost .bg-gear {
  filter: drop-shadow(0 0 20px rgba(242, 210, 114, .75)) brightness(1.3);
}
body.slow .bg-gear {
  filter: drop-shadow(0 0 8px rgba(96, 130, 112, .5)) brightness(.7) saturate(.55);
}

@keyframes cursorSpin { to { transform: rotate(360deg); } }

@media (pointer: fine) {
  *, *::before, *::after { cursor: none !important; }
}

#cursor {
  position: fixed;
  left: -40px;
  top: -40px;
  width: 38px;
  height: 38px;
  z-index: 2000;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(1);
  transition: transform .18s cubic-bezier(.2, .8, .2, 1.2), filter .18s;
  filter: drop-shadow(0 0 6px rgba(212, 175, 55, .55));
  will-change: left, top;
}
#cursor svg {
  width: 100%;
  height: 100%;
  animation: cursorSpin 7s linear infinite;
  transform-origin: center;
}
#cursor.grow {
  transform: translate(-50%, -50%) scale(1.5);
  filter: drop-shadow(0 0 12px rgba(242, 210, 114, .85));
}
#cursor.hot {
  filter: drop-shadow(0 0 14px rgba(192, 57, 43, .95));
}
@media (pointer: coarse) { #cursor { display: none; } }

.hud {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem clamp(1rem, 4vw, 3rem);
}

.masthead {
  font-size: clamp(1.3rem, 3vw, 2rem);
  color: var(--brass-bright);
  letter-spacing: .14em;
  line-height: 1.5;
  text-shadow: 0 3px 0 rgba(0, 0, 0, .6), 0 0 18px rgba(212, 175, 55, .4);
}
.masthead .en {
  display: block;
  font-size: .46em;
  letter-spacing: .42em;
  color: #b9a981;
}
.masthead-sub {
  font-size: clamp(.7rem, 1.6vw, .9rem);
  color: #cdb98c;
  letter-spacing: .18em;
  margin-top: .25rem;
}

.hud-right { display: flex; align-items: center; gap: .8rem; }
#valveLabel {
  font-size: .85rem;
  color: #cdb98c;
  letter-spacing: .15em;
}

.hud-btn {
  font-family: var(--font-mincho);
  font-size: .8rem;
  letter-spacing: .18em;
  color: #e9d8a8;
  padding: .45rem .9rem;
  background: linear-gradient(180deg, #5C4427, #3a2a1a);
  border: 1px solid #241512;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 3px 0 #241512, inset 0 1px 0 rgba(255, 255, 255, .15);
  transition: transform .06s, box-shadow .06s, filter .15s;
}
.hud-btn:hover { filter: brightness(1.15); }
.hud-btn:active {
  transform: translateY(3px);
  box-shadow: 0 0 0 #241512, inset 0 2px 4px rgba(0, 0, 0, .4);
}

.valve-btn {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 3px solid #241512;
  cursor: pointer;
  position: relative;
  background:
    radial-gradient(circle at 32% 28%, #f9e39a, transparent 45%),
    linear-gradient(160deg, var(--brass-bright), var(--brass) 45%, var(--bronze) 75%, var(--bronze-dark));
  box-shadow: inset 0 2px 4px rgba(255, 255, 255, .45), inset 0 -4px 8px rgba(0, 0, 0, .5), 0 6px 12px rgba(0, 0, 0, .6);
  transition: transform .15s, filter .15s, box-shadow .15s;
}
.valve-btn svg { width: 72%; height: 72%; filter: drop-shadow(0 2px 3px rgba(0, 0, 0, .5)); }
.valve-btn .wings {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform .5s cubic-bezier(.6, -.2, .3, 1.4);
}
.valve-btn.open .wings { transform: rotate(45deg); }
.valve-btn:hover { filter: brightness(1.12); }
.valve-btn:active { transform: scale(.93); }

.stage {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: minmax(300px, 360px) 1fr;
  gap: clamp(1rem, 3vw, 2rem);
  align-items: start;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem) 2rem;
}

.panel {
  position: relative;
  border-radius: 10px;
  border: 2px solid var(--bronze-dark);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .55), inset 0 0 42px rgba(0, 0, 0, .5), 0 14px 34px rgba(0, 0, 0, .55);
  background-image:
    radial-gradient(circle 5px at 16px 16px, #F2D272 0 2px, #6b4a24 3px 4px, rgba(0, 0, 0, 0) 5px),
    radial-gradient(circle 5px at calc(100% - 16px) 16px, #F2D272 0 2px, #6b4a24 3px 4px, rgba(0, 0, 0, 0) 5px),
    radial-gradient(circle 5px at 16px calc(100% - 16px), #F2D272 0 2px, #6b4a24 3px 4px, rgba(0, 0, 0, 0) 5px),
    radial-gradient(circle 5px at calc(100% - 16px) calc(100% - 16px), #F2D272 0 2px, #6b4a24 3px 4px, rgba(0, 0, 0, 0) 5px),
    radial-gradient(circle 5px at 50% 10px, #F2D272 0 2px, #6b4a24 3px 4px, rgba(0, 0, 0, 0) 5px),
    radial-gradient(circle 5px at 50% calc(100% - 10px), #F2D272 0 2px, #6b4a24 3px 4px, rgba(0, 0, 0, 0) 5px),
    radial-gradient(circle 5px at 10px 50%, #F2D272 0 2px, #6b4a24 3px 4px, rgba(0, 0, 0, 0) 5px),
    radial-gradient(circle 5px at calc(100% - 10px) 50%, #F2D272 0 2px, #6b4a24 3px 4px, rgba(0, 0, 0, 0) 5px),
    linear-gradient(165deg, rgba(93, 64, 55, .93), rgba(36, 21, 18, .96));
}

.panel-title {
  font-size: .95rem;
  letter-spacing: .24em;
  color: #e9d8a8;
  border-bottom: 1px solid rgba(212, 175, 55, .35);
  padding: .9rem 1.2rem .7rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .7);
}
.panel-title .en {
  font-size: .68em;
  color: #8f7f55;
  letter-spacing: .28em;
  margin-left: .4rem;
}

.gauge-panel { text-align: center; padding-bottom: 1.2rem; }

.gauge {
  position: relative;
  width: min(320px, 86%);
  margin: .6rem auto 0;
}
.gauge svg {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, .6));
}
.gauge text {
  font-family: var(--font-mincho);
  fill: #e9d8a8;
  font-size: 9px;
  letter-spacing: .05em;
}
.gauge .tick { stroke: #e9d8a8; stroke-width: 1.5; }
.gauge .tick.major { stroke: var(--brass-bright); stroke-width: 2.5; }
.gauge .zone { opacity: .9; }

.gauge .needleInner {
  transform-box: view-box;
  transform-origin: 120px 118px;
}

.gauge-danger {
  position: absolute;
  inset: -5%;
  border-radius: 12px;
  pointer-events: none;
  opacity: 0;
  box-shadow: 0 0 60px 14px rgba(192, 57, 43, .55), inset 0 0 40px rgba(192, 57, 43, .35);
  transition: opacity .3s;
}
.gauge.danger .gauge-danger {
  opacity: 1;
  animation: dangerPulse .5s ease-in-out infinite;
}
.gauge.danger .needleInner {
  animation: tremble .1s linear infinite alternate;
  filter: drop-shadow(0 0 8px rgba(192, 57, 43, .95));
}
@keyframes tremble { from { transform: rotate(-5deg); } to { transform: rotate(5deg); } }
@keyframes dangerPulse { 0%, 100% { opacity: .7; } 50% { opacity: 1; } }

.gauge-readout {
  font-size: 2rem;
  color: var(--brass-bright);
  letter-spacing: .05em;
  margin-top: .2rem;
  text-shadow: 0 0 12px rgba(212, 175, 55, .5);
}
.gauge-readout small {
  font-size: .9rem;
  color: #b9a981;
  letter-spacing: .2em;
}
.gauge-status {
  color: #cdb98c;
  letter-spacing: .2em;
  font-size: .85rem;
  margin-top: .3rem;
}
.gauge-status.bad { color: #ff7d66; }
.gauge-status.good { color: #8fd0a0; }

body.victory .gauge svg {
  filter: drop-shadow(0 0 22px rgba(138, 208, 160, .55));
}
body.victory .bg-gear {
  filter: drop-shadow(0 0 22px rgba(242, 210, 114, .85)) brightness(1.35);
}
body.victory .core-reactor {
  border-color: var(--brass-bright);
  box-shadow: inset 0 0 44px rgba(242, 210, 114, .95), 0 0 64px rgba(242, 210, 114, .7);
}

body.defeat .bg-gear {
  filter: drop-shadow(0 0 8px rgba(96, 130, 112, .5)) brightness(.7) saturate(.55);
}
body.defeat .core-reactor {
  animation: none;
  border-color: #5a2a24;
  background: radial-gradient(circle at 50% 50%, rgba(90, 40, 30, .5) 0 20%, rgba(30, 15, 12, .95) 60%);
  box-shadow: inset 0 0 30px rgba(90, 40, 30, .8), 0 0 26px rgba(120, 40, 30, .4);
}
body.defeat .gauge svg {
  filter: drop-shadow(0 0 16px rgba(192, 57, 43, .5));
}
body.defeat .gauge-panel { animation: defeatShake .5s ease 2; }
@keyframes defeatShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  50% { transform: translateX(4px); }
  75% { transform: translateX(-3px); }
}

.core-panel { min-height: 540px; overflow: hidden; }

.hud-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .5rem;
  padding: 1rem 1.2rem .8rem;
  border-bottom: 1px solid rgba(212, 175, 55, .25);
}
.stat {
  text-align: center;
  background: rgba(0, 0, 0, .28);
  border: 1px solid rgba(212, 175, 55, .2);
  border-radius: 6px;
  padding: .5rem .2rem;
}
.stat-key {
  display: block;
  font-size: .68rem;
  letter-spacing: .3em;
  color: #9a8a5f;
  margin-bottom: .25rem;
}
.stat-val {
  font-size: 1.5rem;
  color: var(--brass-bright);
  text-shadow: 0 0 10px rgba(212, 175, 55, .4);
}

.screen {
  display: none;
  padding: 1.6rem clamp(1.2rem, 4vw, 2.4rem) 2rem;
  animation: screenIn .45s cubic-bezier(.2, .8, .3, 1.1);
}
.screen.active { display: block; }
@keyframes screenIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

.screen-title {
  font-size: clamp(1.5rem, 4.5vw, 2.4rem);
  color: var(--brass-bright);
  text-align: center;
  letter-spacing: .14em;
  line-height: 1.5;
  margin: 1rem 0;
  text-shadow: 0 4px 0 rgba(0, 0, 0, .5), 0 0 24px rgba(212, 175, 55, .35);
}

.story {
  text-align: center;
  color: #e6dcc0;
  line-height: 2;
  font-size: .98rem;
  letter-spacing: .05em;
}
.story b { color: var(--brass-bright); }
.story .en {
  display: block;
  color: #9a8a5f;
  font-size: .85em;
  margin-top: .5rem;
  letter-spacing: .06em;
}

.core-reactor {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  border-radius: 50%;
  border: 3px solid var(--brass-dark);
  background:
    radial-gradient(circle at 50% 50%, rgba(242, 210, 114, .9) 0 14%, rgba(212, 175, 55, .35) 30%, rgba(36, 21, 18, .92) 55%);
  box-shadow: inset 0 0 30px rgba(212, 175, 55, .5), 0 0 30px rgba(212, 175, 55, .35);
  animation: corePulse 2.2s ease-in-out infinite;
}
.result-core { margin-top: .5rem; }
@keyframes corePulse {
  0%, 100% { box-shadow: inset 0 0 30px rgba(212, 175, 55, .5), 0 0 24px rgba(212, 175, 55, .3); }
  50% { box-shadow: inset 0 0 44px rgba(242, 210, 114, .85), 0 0 46px rgba(242, 210, 114, .55); }
}

.brass-btn {
  display: block;
  margin: 1.4rem auto 0;
  padding: .85rem 2rem;
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: #241512;
  background: linear-gradient(180deg, #fbe694, var(--brass) 45%, var(--bronze) 80%, var(--bronze-dark));
  border: 2px solid #241512;
  border-radius: 8px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .55), inset 0 -3px 6px rgba(0, 0, 0, .45), 0 6px 0 #2a1f17, 0 10px 18px rgba(0, 0, 0, .5);
  cursor: pointer;
  transition: transform .07s, box-shadow .07s, filter .15s;
}
.brass-btn:hover { filter: brightness(1.08); }
.brass-btn:active {
  transform: translateY(6px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .5), inset 0 -2px 4px rgba(0, 0, 0, .4), 0 0 0 #2a1f17, 0 4px 10px rgba(0, 0, 0, .4);
}

.word-card {
  position: relative;
  text-align: center;
  padding: 1.2rem 1rem 1.4rem;
  background: linear-gradient(180deg, rgba(0, 0, 0, .38), rgba(0, 0, 0, .15));
  border: 1px solid rgba(212, 175, 55, .3);
  border-radius: 8px;
}
.word-topline {
  display: flex;
  justify-content: space-between;
  margin-bottom: .5rem;
}
.pos-tag, .dif-tag {
  font-size: .72rem;
  letter-spacing: .22em;
  color: #0f0a08;
  background: linear-gradient(180deg, #fbe694, #d4af37);
  padding: .2rem .6rem;
  border-radius: 3px;
  border: 1px solid #241512;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .4);
}
.dif-tag {
  background: linear-gradient(180deg, #9fb8a8, #4A5D4E);
  color: #fff;
}
.word-text {
  font-size: clamp(2rem, 7vw, 3.4rem);
  color: var(--brass-bright);
  letter-spacing: .12em;
  line-height: 1.3;
  text-shadow: 0 4px 0 rgba(0, 0, 0, .6), 0 0 26px rgba(212, 175, 55, .4);
}
.hint {
  margin-top: .7rem;
  color: #b9a981;
  font-size: .82rem;
  letter-spacing: .05em;
}
.hint::before {
  content: "機件日誌：";
  color: var(--brass);
  margin-right: .3em;
}

.timebar {
  height: 12px;
  margin: 1rem 0;
  border: 1px solid #241512;
  border-radius: 6px;
  overflow: hidden;
  background: #241512;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, .7);
}
.time-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(180deg, #cde8d2, #7fae8a 55%, #4A5D4E);
  border-radius: 5px;
  transition: width .12s linear, background .3s;
}
.time-fill.low { background: linear-gradient(180deg, #ffb39e, #c0392b 60%, #7c1f14); }

.options { display: grid; gap: .75rem; }

.option {
  position: relative;
  display: block;
  width: 100%;
  text-align: left;
  padding: .85rem 1.1rem;
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  color: #fff3d6;
  letter-spacing: .08em;
  background: linear-gradient(180deg, #7d5c36, #5C4427 55%, #3a2a1a);
  border: 1px solid #241512;
  border-radius: 7px;
  box-shadow: 0 5px 0 #241512, inset 0 1px 0 rgba(255, 255, 255, .22);
  transition: transform .06s ease, box-shadow .06s ease, background .15s, filter .15s;
}
.option::before {
  content: attr(data-letter);
  display: inline-block;
  width: 1.6em;
  height: 1.6em;
  line-height: 1.6em;
  text-align: center;
  margin-right: .7em;
  font-size: .8em;
  color: #241512;
  background: linear-gradient(180deg, #fbe694, #d4af37);
  border-radius: 4px;
  border: 1px solid #241512;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .4);
}
.option small {
  display: block;
  font-size: .7rem;
  color: #b9a981;
  letter-spacing: .18em;
  margin-top: .15rem;
  margin-left: 2.3em;
}
.option:disabled { cursor: default; filter: grayscale(.4) saturate(.7); }
.option.correct {
  background: linear-gradient(180deg, #f3e08c, #d4af37 55%, #9a7b1e);
  color: #241512;
  border-color: #241512;
  box-shadow: 0 0 0 3px rgba(212, 175, 55, .6), 0 6px 18px rgba(212, 175, 55, .35);
  animation: correctPop .45s cubic-bezier(.2, .9, .3, 1.4);
}
.option.wrong {
  background: linear-gradient(180deg, #a03a2c, #7c1f14 60%, #4d100a);
  box-shadow: 0 0 0 3px rgba(192, 57, 43, .55);
  animation: shake .35s ease;
}
@keyframes correctPop {
  0% { transform: scale(1); }
  40% { transform: scale(1.06); }
  100% { transform: scale(1); }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-7px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(3px); }
}

@media (hover: hover) {
  .option:not(:disabled):hover {
    background: linear-gradient(180deg, #8f6b3f, #6b4a24 55%, #452d1c);
    transform: translateY(-2px);
    box-shadow: 0 7px 0 #241512, inset 0 1px 0 rgba(255, 255, 255, .25);
  }
  .option:not(:disabled):active {
    transform: translateY(5px);
    box-shadow: 0 0 0 #241512, inset 0 2px 4px rgba(0, 0, 0, .5);
  }
}

.feedback {
  min-height: 2.2rem;
  margin-top: 1rem;
  text-align: center;
  letter-spacing: .06em;
  font-size: .95rem;
  line-height: 1.8;
}
.feedback.good { color: #a8d8b4; }
.feedback.bad { color: #ff8d78; }

.result { text-align: center; }
.result-stats {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-top: 1.2rem;
}
.result-stats div {
  background: rgba(0, 0, 0, .3);
  border: 1px solid rgba(212, 175, 55, .25);
  border-radius: 6px;
  padding: .6rem 1rem;
  color: #b9a981;
  letter-spacing: .12em;
  font-size: .85rem;
}
.result-stats b {
  color: var(--brass-bright);
  font-size: 1.2rem;
  margin-left: .35rem;
}
.result-stats span {
  color: var(--brass-bright);
  margin-left: .35rem;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  place-items: center;
  padding: 1rem;
  background: rgba(20, 10, 8, .78);
  backdrop-filter: blur(3px);
}
.modal.open { display: grid; animation: fadeIn .3s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-panel {
  position: relative;
  width: min(640px, 94vw);
  max-height: 84vh;
  overflow: auto;
  padding: 2rem;
  animation: screenIn .35s cubic-bezier(.2, .8, .3, 1.1);
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-family: var(--font-mincho);
  font-size: 1.4rem;
  line-height: 1;
  color: #241512;
  background: linear-gradient(180deg, #fbe694, var(--brass) 45%, var(--bronze) 80%, var(--bronze-dark));
  border: 2px solid #241512;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .5), 0 3px 0 #241512;
  transition: transform .06s, box-shadow .06s, filter .15s;
}
.modal-close:hover { filter: brightness(1.1); }
.modal-close:active { transform: translateY(3px); box-shadow: inset 0 2px 4px rgba(0, 0, 0, .4), 0 0 0 #241512; }

body.modal-open { overflow: hidden; }

.manual-body {
  color: #e6dcc0;
  line-height: 1.9;
  font-size: .92rem;
  letter-spacing: .04em;
}
.manual-body section { margin-bottom: 1.2rem; }
.manual-body section:last-child { margin-bottom: 0; }
.manual-body h3 {
  color: var(--brass-bright);
  letter-spacing: .15em;
  font-size: .95rem;
  margin-bottom: .4rem;
  border-left: 3px solid var(--brass);
  padding-left: .6rem;
}
.manual-body p { margin: .2rem 0 .4rem .6rem; }
.manual-body ul { list-style: none; padding-left: 0; }
.manual-body li {
  padding: .2rem 0 .2rem 1.3rem;
  position: relative;
}
.manual-body li::before {
  content: "◆";
  position: absolute;
  left: .2rem;
  top: .45em;
  font-size: .7rem;
  color: var(--brass);
}
.manual-body b { color: var(--brass-bright); }

.wordbook-panel { width: min(840px, 94vw); }
.wordbook-toolbar {
  display: flex;
  gap: .8rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 1rem;
}
#wbSearch {
  flex: 1;
  min-width: 200px;
  padding: .6rem .9rem;
  font-family: var(--font-mincho);
  font-size: .9rem;
  color: var(--ink);
  background: #241512;
  border: 1px solid var(--bronze-dark);
  border-radius: 6px;
  letter-spacing: .05em;
  outline: none;
}
#wbSearch:focus { border-color: var(--brass); box-shadow: 0 0 0 2px rgba(212, 175, 55, .35); }
#wbSearch::placeholder { color: #7a6a4a; }

.wb-filters { display: flex; gap: .4rem; flex-wrap: wrap; }
.wb-chip {
  padding: .4rem .9rem;
  font-family: var(--font-mincho);
  font-size: .8rem;
  letter-spacing: .12em;
  color: #e9d8a8;
  background: linear-gradient(180deg, #5C4427, #3a2a1a);
  border: 1px solid #241512;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 3px 0 #241512, inset 0 1px 0 rgba(255, 255, 255, .15);
  transition: transform .06s, box-shadow .06s, filter .15s;
}
.wb-chip:hover { filter: brightness(1.15); }
.wb-chip.active {
  background: linear-gradient(180deg, #fbe694, var(--brass));
  color: #241512;
  box-shadow: 0 3px 0 #241512, inset 0 1px 0 rgba(255, 255, 255, .4);
}
.wb-chip:active { transform: translateY(3px); box-shadow: 0 0 0 #241512; }

.wb-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: .8rem;
}
.wb-card {
  background: rgba(0, 0, 0, .3);
  border: 1px solid rgba(212, 175, 55, .25);
  border-radius: 8px;
  padding: .9rem 1rem;
}
.wb-head {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: .4rem;
}
.wb-word {
  font-size: 1.15rem;
  color: var(--brass-bright);
  letter-spacing: .06em;
  text-shadow: 0 0 10px rgba(212, 175, 55, .35);
}
.wb-pos {
  font-size: .7rem;
  color: #b9a981;
  letter-spacing: .2em;
}
.wb-dif {
  margin-left: auto;
  font-size: .65rem;
  padding: .15rem .5rem;
  border-radius: 3px;
  letter-spacing: .15em;
  background: #4A5D4E;
  color: #fff;
}
.wb-dif.dif-1 { background: #4A9E6B; }
.wb-dif.dif-3 { background: #C0392B; }
.wb-zh {
  font-size: 1rem;
  color: #e6dcc0;
}
.wb-hint {
  margin-top: .5rem;
  font-size: .75rem;
  color: #9a8a5f;
  line-height: 1.7;
}
.wb-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: #9a8a5f;
  padding: 2rem 0;
}

.footer {
  position: relative;
  z-index: 5;
  text-align: center;
  padding: 1rem;
  color: #8f7f55;
  font-size: .75rem;
  letter-spacing: .3em;
  border-top: 1px solid rgba(212, 175, 55, .2);
}
.footer span { display: block; margin: .2rem; }

@media (max-width: 900px) {
  .stage { grid-template-columns: 1fr; }
  .gauge-panel { max-width: 420px; margin: 0 auto; }
  .core-panel { min-height: 0; }
  .hud-stats { grid-template-columns: repeat(4, 1fr); }
}