/* ============================================================
   TOKENS
   ============================================================ */
:root{
  --bg:#07060d;
  --ink:#f4f1ea;
  --dim:#9a968e;
  --mid:#6f6b64;
  --line:rgba(244,241,234,.13);
  --line2:rgba(244,241,234,.30);
  --accent:#ffd966;
  --accent2:#7ee0c0;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,monospace;
  --sans:'Inter Tight','Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  min-height:100vh;
  font-family:var(--sans);
  color:var(--ink);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  background:
    radial-gradient(ellipse 70% 50% at 15% -5%, #2b1a63 0%, transparent 60%),
    radial-gradient(ellipse 62% 46% at 90% 3%, #40134f 0%, transparent 58%),
    radial-gradient(ellipse 85% 60% at 50% 108%, #0f1a4a 0%, transparent 64%),
    linear-gradient(180deg,#07060d 0%, #0a0716 46%, #050409 100%);
  background-attachment:fixed;
}

/* ============================================================
   ATMOSPHERE
   ============================================================ */
.sky{position:fixed;inset:0;z-index:-4;overflow:hidden;pointer-events:none;}
.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.42;mix-blend-mode:screen;will-change:transform;}
.b1{width:52vw;height:52vw;left:-14%;top:-12%;background:radial-gradient(circle,#7c3aed,transparent 66%);animation:drift1 24s ease-in-out infinite alternate;}
.b2{width:46vw;height:46vw;right:-14%;top:2%;background:radial-gradient(circle,#db2777,transparent 66%);animation:drift2 29s ease-in-out infinite alternate;}
.b3{width:44vw;height:44vw;left:24%;bottom:-20%;background:radial-gradient(circle,#0ea5e9,transparent 66%);animation:drift3 27s ease-in-out infinite alternate;}
.b4{width:34vw;height:34vw;right:6%;bottom:-12%;background:radial-gradient(circle,#f59e0b,transparent 68%);animation:drift1 32s ease-in-out infinite alternate-reverse;}
@keyframes drift1{to{transform:translate(5vw,7vh) scale(1.16);}}
@keyframes drift2{to{transform:translate(-6vw,5vh) scale(1.2);}}
@keyframes drift3{to{transform:translate(4vw,-7vh) scale(1.1);}}

.comb{
  position:fixed;inset:0;z-index:-3;pointer-events:none;opacity:.05;
  background-image:
    repeating-linear-gradient(60deg, transparent 0 30px, #ffd54f 30px 31px),
    repeating-linear-gradient(-60deg, transparent 0 30px, #ffd54f 30px 31px),
    repeating-linear-gradient(0deg, transparent 0 30px, #ffd54f 30px 31px);
}

.grain{
  position:fixed;inset:0;z-index:9998;pointer-events:none;opacity:.045;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============================================================
   TOP BAR
   ============================================================ */
.bar{
  position:fixed;top:0;left:0;right:0;z-index:90;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px clamp(16px,4vw,42px);
  background:rgba(7,6,13,.55);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.bar-l{display:flex;align-items:center;gap:12px;min-width:0;}
.mark{
  width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;border-radius:9px;
  font-size:1rem;font-weight:700;color:#0a0512;
  background:linear-gradient(140deg,#ffd966,#f4a261);
  box-shadow:0 8px 22px -10px #ffd966;
}
.bar-t b{display:block;font:600 .82rem var(--mono);letter-spacing:.14em;}
.bar-t small{display:block;font-size:.68rem;color:var(--mid);letter-spacing:.06em;margin-top:2px;}

.bar-r{display:flex;align-items:center;gap:12px;}
.meter{width:clamp(70px,20vw,170px);height:4px;border-radius:99px;background:rgba(244,241,234,.1);overflow:hidden;}
.meter>i{display:block;height:100%;width:0;border-radius:99px;
  background:linear-gradient(90deg,var(--accent2),var(--accent));
  transition:width .7s cubic-bezier(.22,.9,.24,1);}
.num{font:500 11px var(--mono);letter-spacing:.1em;color:var(--dim);white-space:nowrap;}
.num b{color:var(--accent);font-weight:600;}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative;height:100vh;height:100svh;min-height:520px;
  display:grid;place-items:center;overflow:hidden;
  padding:0 clamp(16px,4vw,42px);
}
.hero-core{position:relative;text-align:center;width:100%;}
.hl{
  font-weight:800;line-height:.92;letter-spacing:-.05em;white-space:nowrap;
  will-change:transform,opacity;
}
.hl1{
  font-size:clamp(5.5rem,20vw,15rem);
  background:linear-gradient(180deg,#ffffff,#c4b5fd 55%,#8b5cf6);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  filter:drop-shadow(0 14px 60px rgba(139,92,246,.5));
}
.hl2{
  font:500 clamp(.85rem,2.6vw,1.9rem) var(--mono);
  letter-spacing:.42em;color:var(--ink);margin-top:clamp(10px,2vw,22px);
  text-indent:.42em;
}
.hero-cap{
  margin-top:clamp(26px,5vh,54px);
  font:400 11px var(--mono);letter-spacing:.24em;color:var(--mid);
  display:flex;align-items:center;justify-content:center;gap:12px;
}
.hero-cap::before,.hero-cap::after{content:'';width:42px;height:1px;background:var(--line2);}

.hero-meta{
  position:absolute;font:400 10px var(--mono);letter-spacing:.2em;color:var(--mid);
  text-transform:uppercase;pointer-events:none;
}
.hero-meta.tl{left:clamp(16px,4vw,42px);top:96px;}
.hero-meta.tr{right:clamp(16px,4vw,42px);top:96px;text-align:right;}
.hero-meta.bl{left:clamp(16px,4vw,42px);bottom:34px;}
.hero-meta.br{right:clamp(16px,4vw,42px);bottom:34px;text-align:right;}

.hero-rule{position:absolute;left:clamp(16px,4vw,42px);right:clamp(16px,4vw,42px);top:50%;height:1px;background:var(--line);transform:scaleX(0);transform-origin:left;}

/* ============================================================
   SECTIONS
   ============================================================ */
.wrap{max-width:1180px;margin:0 auto;padding:0 clamp(16px,4vw,42px);}
section{padding:clamp(60px,10vh,120px) 0;}

.sec-head{
  display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:18px;margin-bottom:clamp(30px,5vw,52px);
}
.sec-head .idx{font:500 11px var(--mono);color:var(--mid);letter-spacing:.12em;}
.sec-head h2{font-size:clamp(1.55rem,4.6vw,2.6rem);font-weight:700;letter-spacing:-.035em;line-height:1;}
.sec-head h2 em{font:500 .44em var(--mono);font-style:normal;letter-spacing:.24em;color:var(--accent);margin-left:14px;vertical-align:middle;}
.sec-head p{margin-left:auto;font:400 10.5px var(--mono);letter-spacing:.16em;color:var(--mid);text-transform:uppercase;}

/* ============================================================
   ORBIT
   ============================================================ */
.orbit-holder{width:100%;position:relative;}
.orbit-scale{
  height:430px;display:grid;place-items:center;
  transform-origin:top center;
  transition:transform .3s ease;
}
.orbit-stage{
  perspective:1500px;perspective-origin:50% 50%;
  width:100%;height:100%;display:grid;place-items:center;
  touch-action:pan-y;
  cursor:grab;
}
.orbit-stage:active{cursor:grabbing;}
.orbit{
  position:relative;width:0;height:0;
  transform-style:preserve-3d;
  will-change:transform;
}
.ocard{
  position:absolute;left:0;top:0;
  width:150px;height:190px;margin:-95px 0 0 -75px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;
  border:1px solid var(--line2);border-radius:12px;
  background:linear-gradient(165deg,rgba(30,26,52,.94),rgba(9,8,17,.97));
  box-shadow:0 22px 54px -26px rgba(0,0,0,.95);
  will-change:transform,opacity;
  user-select:none;
  transition:border-color .35s, box-shadow .35s, background .35s;
}
.ocard.front{
  border-color:var(--accent);
  background:linear-gradient(165deg,rgba(58,44,26,.95),rgba(14,10,20,.97));
  box-shadow:0 0 60px -16px rgba(255,217,102,.55), 0 22px 54px -26px rgba(0,0,0,.95);
}
.oc-idx{position:absolute;top:10px;left:12px;font:500 9px var(--mono);color:var(--mid);letter-spacing:.1em;}
.oc-hz{font-size:1.85rem;font-weight:700;letter-spacing:.02em;color:var(--ink);}
.oc-py{font:400 12px var(--mono);color:var(--accent);letter-spacing:.04em;}

.orbit-info{
  max-width:840px;margin:8px auto 0;
  display:grid;grid-template-columns:auto 1fr;gap:clamp(20px,5vw,48px);align-items:center;
  border-top:1px solid var(--line);padding-top:clamp(20px,3vw,32px);
}
.oi-left{display:flex;align-items:baseline;gap:14px;}
.oi-hanzi{font-size:clamp(2.2rem,7vw,3.6rem);font-weight:800;letter-spacing:-.03em;line-height:1;}
.oi-py{font:400 clamp(.82rem,2vw,1rem) var(--mono);color:var(--accent);letter-spacing:.06em;}
.oi-mm{font-size:clamp(.92rem,2.2vw,1.1rem);font-weight:600;line-height:1.5;color:#ffe9b8;}
.oi-ex{font:400 clamp(.76rem,1.8vw,.88rem) var(--mono);color:var(--dim);line-height:1.7;margin-top:8px;}
.oi-ex::before{content:'例 / ';color:var(--mid);}

.orbit-foot{display:flex;justify-content:center;margin-top:clamp(28px,4vw,44px);}

/* ---- Orbit Controls ---- */
.orbit-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.orbit-ctrl-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line2);
  background: rgba(244,241,234,.04);
  color: var(--ink);
  font-size: 1.1rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all .25s;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.orbit-ctrl-btn:hover {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
  transform: translateY(-2px);
}
.orbit-ctrl-btn:active {
  transform: scale(.94);
}
.orbit-ctrl-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}
.shuffle{
  font:500 11px var(--mono);letter-spacing:.18em;text-transform:uppercase;
  padding:11px 26px;border-radius:99px;cursor:pointer;
  background:transparent;border:1px solid var(--line2);color:var(--ink);
  transition:.25s;
}
.shuffle:hover{background:var(--ink);color:var(--bg);border-color:var(--ink);}

/* ============================================================
   TRACKLIST
   ============================================================ */
.tracklist{border-top:1px solid var(--line);}
.trow{
  position:relative;display:grid;
  grid-template-columns:56px 40px minmax(0,1fr) minmax(0,1.15fr) auto 34px;
  align-items:center;gap:16px;
  width:100%;text-align:left;font-family:inherit;color:inherit;
  padding:19px 10px;border:0;border-bottom:1px solid var(--line);
  background:transparent;cursor:pointer;
  transition:background .3s, padding .3s;
}
.trow::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:2px;
  background:var(--c1);transform:scaleY(0);transform-origin:top;
  transition:transform .3s;
}
.trow:hover::before,.trow:focus-visible::before{transform:scaleY(1);}
.trow:hover,.trow:focus-visible{
  background:linear-gradient(90deg,color-mix(in srgb,var(--c1) 13%,transparent),transparent 68%);
  padding-left:20px;outline:none;
}
.tnum{font:500 11px var(--mono);color:var(--mid);letter-spacing:.1em;}
.ticon{font-size:1.3rem;filter:grayscale(.45) brightness(.85);transition:.35s;}
.trow:hover .ticon{filter:none;transform:scale(1.18) rotate(-5deg);}
.ttitle{display:block;font-size:1.03rem;font-weight:700;letter-spacing:-.01em;}
.ten{display:block;font:500 9.5px var(--mono);letter-spacing:.22em;color:var(--c1);margin-top:4px;}
.tdesc{font-size:.8rem;line-height:1.55;color:var(--dim);}
.ttags{display:flex;gap:6px;}
.ttags i{font-style:normal;font:500 9px var(--mono);letter-spacing:.12em;
  padding:4px 9px;border:1px solid var(--line);border-radius:99px;color:var(--dim);white-space:nowrap;}
.tgo{font:400 15px var(--mono);color:var(--mid);transition:.28s;}
.trow:hover .tgo{color:var(--accent);transform:translateX(6px);}

/* ============================================================
   FOOTER
   ============================================================ */
.foot{
  border-top:1px solid var(--line);
  padding:32px clamp(16px,4vw,42px) 48px;
  display:flex;gap:18px;flex-wrap:wrap;justify-content:space-between;align-items:center;
  font:400 10.5px var(--mono);letter-spacing:.16em;color:var(--mid);text-transform:uppercase;
}
.foot b{color:var(--accent);font-weight:500;}

/* ============================================================
   STAGE / PANEL
   ============================================================ */
.stage{
  position:fixed;inset:0;z-index:300;display:flex;align-items:center;justify-content:center;
  padding:clamp(10px,3vw,24px);
  background:rgba(4,3,10,.86);
  backdrop-filter:blur(20px) saturate(140%);
  -webkit-backdrop-filter:blur(20px) saturate(140%);
  opacity:0;pointer-events:none;transition:opacity .3s;
}
.stage.open{opacity:1;pointer-events:auto;}

.panel{
  width:min(880px,100%);max-height:92vh;display:flex;flex-direction:column;
  border-radius:16px;overflow:hidden;
  background:linear-gradient(170deg,rgba(19,17,31,.99),rgba(7,6,13,.997));
  border:1px solid var(--line2);
  box-shadow:0 0 110px -34px var(--c1), 0 40px 90px rgba(0,0,0,.9);
  transform:translateY(18px) scale(.98);
  transition:transform .38s cubic-bezier(.22,1,.36,1);
}
.stage.open .panel{transform:none;}

.panel-head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:13px 17px;flex-wrap:wrap;
  border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,color-mix(in srgb,var(--c1) 15%,transparent),transparent 72%);
}
.panel-id{display:flex;align-items:center;gap:11px;min-width:0;}
.panel-emoji{
  width:40px;height:40px;flex:0 0 40px;border-radius:10px;display:grid;place-items:center;font-size:1.15rem;
  background:linear-gradient(140deg,var(--c1),var(--c2));
  box-shadow:0 10px 24px -14px var(--c1);
}
.panel-id h2{font-size:.98rem;font-weight:700;letter-spacing:-.01em;line-height:1.2;}
.panel-id small{display:block;font:500 9px var(--mono);letter-spacing:.2em;color:var(--c1);opacity:.9;margin-top:3px;}

.panel-stats{display:flex;align-items:center;gap:8px;}
.stat{
  text-align:center;min-width:56px;padding:5px 9px;border-radius:8px;
  background:rgba(244,241,234,.035);border:1px solid var(--line);
}
.stat span{display:block;font:600 .92rem var(--mono);color:var(--c1);line-height:1.15;font-variant-numeric:tabular-nums;}
.stat small{font:500 8px var(--mono);letter-spacing:.16em;color:var(--mid);}
.close-btn{
  width:34px;height:34px;border-radius:50%;flex:0 0 34px;
  background:rgba(244,241,234,.05);border:1px solid var(--line2);
  color:var(--ink);font-size:.85rem;cursor:pointer;display:grid;place-items:center;transition:.24s;
}
.close-btn:hover{background:#b91c1c;border-color:#ef4444;color:#fff;transform:rotate(90deg);}

.panel-body{
  padding:17px;overflow-y:auto;flex:1;
  scrollbar-width:thin;scrollbar-color:rgba(244,241,234,.28) transparent;
}
.panel-body::-webkit-scrollbar{width:7px;}
.panel-body::-webkit-scrollbar-thumb{background:rgba(244,241,234,.24);border-radius:8px;}

.panel-foot{
  display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;
  padding:11px 17px;border-top:1px solid var(--line);
  background:rgba(6,5,11,.9);
}

/* ============================================================
   SHARED GAME UI
   ============================================================ */
.game-intro{
  font-size:.79rem;color:var(--dim);line-height:1.6;
  margin-bottom:15px;padding-left:12px;border-left:2px solid var(--c1);
}
.prompt-card{
  padding:15px 17px;border-radius:11px;margin-bottom:15px;
  background:linear-gradient(140deg,rgba(244,241,234,.055),rgba(244,241,234,.015));
  border:1px solid color-mix(in srgb,var(--c1) 34%,transparent);
}
.prompt-label{
  font:500 9px var(--mono);letter-spacing:.24em;text-transform:uppercase;
  color:var(--c1);margin-bottom:9px;
}
.prompt-text{font-size:clamp(1.02rem,3.4vw,1.32rem);font-weight:600;line-height:1.55;color:var(--ink);word-break:break-word;}
.prompt-sub{font:400 11px var(--mono);color:var(--mid);margin-top:8px;letter-spacing:.06em;}
.prompt-py{
  font:400 clamp(.78rem,2vw,.95rem) var(--mono);
  color:var(--accent2);letter-spacing:.03em;line-height:1.75;
  margin-top:9px;padding-top:9px;border-top:1px dashed rgba(244,241,234,.16);
  word-break:break-word;
}
.prompt-hint{
  font:500 clamp(.8rem,2vw,.98rem) var(--mono);
  color:var(--accent2);letter-spacing:.05em;
  margin-top:9px;padding-top:9px;border-top:1px dashed rgba(244,241,234,.16);
}

.speak-btn{
  float:right;margin-left:10px;
  width:30px;height:30px;border-radius:50%;flex:0 0 30px;
  background:rgba(244,241,234,.06);border:1px solid var(--line2);
  color:var(--c1);font-size:.82rem;cursor:pointer;display:grid;place-items:center;
  transition:.2s;
}
.speak-btn:hover{background:var(--c1);color:#0a0512;border-color:var(--c1);transform:scale(1.08);}
.speak-btn:active{transform:scale(.92);}
.speak-btn.playing{background:var(--c1);color:#0a0512;border-color:var(--c1);animation:pulse .9s ease-in-out infinite alternate;}
@keyframes pulse{to{box-shadow:0 0 0 6px color-mix(in srgb,var(--c1) 22%,transparent);}}

.opt-list{display:flex;flex-direction:column;gap:8px;}
.opt{
  display:flex;gap:11px;align-items:flex-start;width:100%;text-align:left;
  font-family:inherit;font-size:.9rem;font-weight:500;line-height:1.48;
  padding:12px 14px;border-radius:10px;
  background:rgba(244,241,234,.035);border:1px solid var(--line);
  color:var(--ink);cursor:pointer;transition:.18s;
}
.opt:hover:not(:disabled){background:rgba(244,241,234,.085);border-color:var(--c1);transform:translateX(4px);}
.opt:disabled{cursor:default;}
.opt .mark{
  width:22px;height:22px;flex:0 0 22px;border-radius:6px;display:grid;place-items:center;
  font:600 10px var(--mono);background:rgba(244,241,234,.08);color:var(--c1);
}
.opt-body{display:flex;flex-direction:column;gap:3px;min-width:0;}
.opt-py{font:400 11px var(--mono);color:var(--accent2);letter-spacing:.04em;opacity:.9;}
.opt.correct{border-color:#4ade80;background:rgba(74,222,128,.12);color:#c9f7d8;}
.opt.correct .mark{background:#4ade80;color:#04240f;}
.opt.correct .opt-py{color:#9df0bc;}
.opt.wrong{border-color:#f87171;background:rgba(248,113,113,.12);color:#ffd3d3;}
.opt.wrong .mark{background:#f87171;color:#2a0404;}
.opt.wrong .opt-py{color:#ffb3b3;}

.game-msg{font:400 11.5px var(--mono);line-height:1.7;min-height:1.7em;margin-top:12px;color:var(--dim);letter-spacing:.02em;}
.game-msg.good{color:#5ee89b;}
.game-msg.bad{color:#fb8a8a;}
.game-msg .dim{opacity:.7;}
.game-msg b{color:var(--ink);font-weight:600;}

.timer-wrap{height:3px;border-radius:99px;background:rgba(244,241,234,.1);overflow:hidden;margin-bottom:15px;}
.timer-bar{height:100%;width:100%;border-radius:99px;
  background:linear-gradient(90deg,var(--c1),var(--c2));
  transition:width .1s linear;box-shadow:0 0 12px color-mix(in srgb,var(--c1) 60%,transparent);}

.chip{display:inline-flex;align-items:center;gap:5px;font:500 9.5px var(--mono);
  letter-spacing:.12em;padding:5px 11px;border-radius:99px;
  background:rgba(244,241,234,.05);border:1px solid var(--line);color:var(--dim);text-transform:uppercase;}
.chip b{color:var(--c1);font-weight:600;}

.act-btn{
  font-family:inherit;font:600 12px var(--mono);letter-spacing:.12em;text-transform:uppercase;
  padding:11px 20px;border-radius:9px;border:0;cursor:pointer;color:#0a0512;
  background:linear-gradient(135deg,var(--c1),var(--c2));
  box-shadow:0 10px 26px -16px var(--c1);transition:.22s;
}
.act-btn:hover{filter:brightness(1.12);transform:translateY(-2px);}
.act-btn.ghost{
  background:transparent;border:1px solid var(--line2);
  color:var(--ink);box-shadow:none;
}
.act-btn.ghost:hover{background:rgba(244,241,234,.08);}
.act-btn:disabled{opacity:.4;cursor:not-allowed;transform:none;filter:none;}

#nextBtn{
  background:linear-gradient(135deg,var(--c1),var(--c2));
  color:#0a0512;border:0;
}
#nextBtn:disabled{opacity:.35;cursor:not-allowed;}

/* ============ FLASHCARDS ============ */
.fc-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px;flex-wrap:wrap;}
.fc-card{height:300px;perspective:1500px;cursor:pointer;border-radius:14px;outline:none;margin-bottom:15px;}
.fc-card:focus-visible{outline:1px solid var(--c1);outline-offset:4px;}
.fc-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;
  transition:transform .65s cubic-bezier(.4,.05,.2,1);}
.fc-card.flipped .fc-inner{transform:rotateY(180deg);}
.fc-face{
  position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  padding:24px;border-radius:14px;text-align:center;overflow:auto;
}
.fc-front{
  background:linear-gradient(150deg,rgba(38,32,66,.9),rgba(12,10,22,.96));
  border:1px solid color-mix(in srgb,var(--c1) 48%,transparent);
}
.fc-back{transform:rotateY(180deg);
  background:linear-gradient(150deg,color-mix(in srgb,var(--c2) 26%,#14111f),color-mix(in srgb,var(--c1) 18%,#0a0812));
  border:1px solid color-mix(in srgb,var(--c2) 52%,transparent);}
.fc-tag{font:500 8.5px var(--mono);letter-spacing:.3em;text-transform:uppercase;opacity:.55;}
.fc-big{font-size:clamp(1.8rem,8vw,2.7rem);font-weight:800;letter-spacing:.02em;color:var(--ink);line-height:1.2;}
.fc-py{font:500 .95rem var(--mono);color:var(--c1);letter-spacing:.05em;}
.fc-mm{font-size:.94rem;font-weight:600;color:#ffe9b8;line-height:1.55;}
.fc-ex{font-size:.82rem;color:var(--dim);line-height:1.6;border-top:1px dashed rgba(244,241,234,.16);padding-top:10px;margin-top:5px;}
.fc-tap{font:500 9px var(--mono);letter-spacing:.2em;text-transform:uppercase;opacity:.42;}

/* ============ MATCH ============ */
.match-wrap{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin-bottom:14px;}
.mcol{display:flex;flex-direction:column;gap:7px;}
.col-head{font:500 9px var(--mono);letter-spacing:.22em;text-transform:uppercase;
  color:var(--mid);text-align:center;margin-bottom:5px;}
.mitem{
  font-family:inherit;text-align:left;font-size:.84rem;font-weight:500;line-height:1.4;
  padding:11px 13px;border-radius:9px;
  background:rgba(244,241,234,.035);border:1px solid var(--line);
  color:var(--ink);cursor:pointer;transition:.18s;word-break:break-word;
}
.mitem:hover:not(.matched){background:rgba(244,241,234,.085);border-color:var(--c1);transform:translateX(3px);}
.mitem.sel{border-color:var(--c1);background:color-mix(in srgb,var(--c1) 20%,transparent);
  box-shadow:0 0 0 2px color-mix(in srgb,var(--c1) 22%,transparent);}
.mitem.matched{border-color:#4ade80;background:rgba(74,222,128,.11);color:#9df0bc;cursor:default;opacity:.82;}
.mitem.bad{border-color:#f87171;background:rgba(248,113,113,.14);animation:shake .4s;}

/* ============ MEMORY ============ */
.mem-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:16px;}
.mtile{position:relative;aspect-ratio:1/1;border:0;background:transparent;perspective:800px;
  cursor:pointer;font-family:inherit;padding:0;}
.mtile .inner{position:absolute;inset:0;transform-style:preserve-3d;
  transition:transform .48s cubic-bezier(.4,.05,.2,1);}
.mtile.flipped .inner,.mtile.matched .inner{transform:rotateY(180deg);}
.mface{
  position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
  border-radius:10px;backface-visibility:hidden;-webkit-backface-visibility:hidden;
  padding:8px 4px;text-align:center;font-weight:600;line-height:1.3;
  word-break:break-word;overflow:hidden;
}
.mfront{background:linear-gradient(140deg,rgba(40,34,70,.95),rgba(12,10,22,.97));
  border:1px solid var(--line2);color:color-mix(in srgb,var(--c1) 60%,transparent);font:500 1.2rem var(--mono);}
.mback{transform:rotateY(180deg);
  background:linear-gradient(135deg,var(--c1),var(--c2));color:#0a0512;
  box-shadow:inset 0 0 26px rgba(0,0,0,.18);}
.mback .word-main{font-size:clamp(.78rem,2.6vw,.98rem);font-weight:700;letter-spacing:.01em;}
.mback .word-py{font:400 clamp(.55rem,1.8vw,.7rem) var(--mono);color:rgba(10,5,18,.75);letter-spacing:.04em;margin-top:3px;}
.mback .word-mm{font-size:clamp(.62rem,2vw,.82rem);font-weight:600;color:#1e1030;margin-top:2px;line-height:1.2;}
.mtile.matched .mback{background:linear-gradient(135deg,#4ade80,#22c55e);color:#04240f;}
.mtile.matched .mback .word-py{color:rgba(4,36,15,.7);}
.mtile.matched .mback .word-mm{color:#04240f;}

/* ============ BUILDER ============ */
.answer-row{
  min-height:62px;display:flex;flex-wrap:wrap;gap:6px;padding:10px;border-radius:11px;
  border:1px dashed var(--line2);background:rgba(244,241,234,.02);
  margin-bottom:13px;align-items:center;
}
.answer-row:empty::before{content:attr(data-empty);color:var(--mid);font:400 11px var(--mono);padding-left:5px;}
.chunk-pool{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:13px;min-height:46px;}
.chip-word{
  font-family:inherit;font-size:.92rem;font-weight:600;padding:9px 14px;border-radius:9px;
  background:linear-gradient(150deg,rgba(244,241,234,.07),rgba(244,241,234,.025));
  border:1px solid var(--line2);color:var(--ink);cursor:pointer;transition:.18s;
  display:flex;flex-direction:column;align-items:center;gap:2px;line-height:1.2;
}
.chip-word:hover{border-color:var(--c1);transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.5);}
.chip-word .cw-main{font-size:.92rem;font-weight:600;}
.chip-word .cw-py{font:400 9px var(--mono);color:var(--accent2);letter-spacing:.03em;opacity:.85;}
.answer-row .chip-word{background:color-mix(in srgb,var(--c1) 22%,transparent);border-color:var(--c1);}
.row-btns{display:flex;gap:8px;flex-wrap:wrap;}

/* ============ BOSS ============ */
.boss-hud{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:12px;}
.hearts{font-size:1rem;letter-spacing:3px;}

/* ============ RESULT ============ */
.result{text-align:center;padding:28px 10px 12px;}
.result-icon{font-size:2.8rem;margin-bottom:10px;filter:drop-shadow(0 0 24px var(--c1));}
.result h3{font-size:1.2rem;margin-bottom:14px;color:var(--ink);font-weight:700;letter-spacing:-.01em;}
.result-score{
  font:800 3rem var(--sans);line-height:1;letter-spacing:-.04em;
  background:linear-gradient(135deg,var(--c1),var(--c2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.result-score small{font:500 .8rem var(--mono);letter-spacing:.24em;margin-left:8px;-webkit-text-fill-color:var(--mid);}
.result p{font-size:.84rem;color:var(--dim);line-height:1.65;margin:18px auto 24px;max-width:44ch;}
.result .row-btns{justify-content:center;}

@keyframes shake{0%,100%{transform:translateX(0);}25%{transform:translateX(-6px);}75%{transform:translateX(6px);}}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:860px){
  .trow{grid-template-columns:40px 34px minmax(0,1fr) 26px;gap:12px;padding:16px 6px;}
  .tdesc,.ttags{display:none;}
  .trow:hover,.trow:focus-visible{padding-left:12px;}
}
@media (max-width:760px){
  .match-wrap{grid-template-columns:1fr;}
  .mem-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .fc-card{height:272px;}
  .orbit-info{grid-template-columns:1fr;gap:16px;}
  .hero-meta.tr,.hero-meta.br{display:none;}
}
@media (max-width:480px){
  .panel-body{padding:13px;}
  .panel-head{padding:10px 12px;}
  .panel-foot{padding:10px 12px;}
  .fc-card{height:250px;}
  .stat{min-width:48px;padding:4px 7px;}
  .result-score{font-size:2.4rem;}
  .bar-t small{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}