/* ================= Word Drop · 单词消消乐 全部样式 ================= */
:root{
  --bg0:#14162f; --bg1:#232663; --panel:#1d2049; --panel-line:rgba(255,255,255,.10);
  --ink:#eef0ff; --ink-dim:#a6aad8; --gold:#ffd54a; --gold-deep:#f59e31;
  --green:#54e0a4; --red:#ff7a7a; --shadow:rgba(7,8,26,.55);
  --font-game:'Fredoka','PingFang SC','Microsoft YaHei',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%;overflow:hidden;overscroll-behavior:none}
body{
  font-family:var(--font-game);
  background:radial-gradient(120% 90% at 50% 0%,#2a2e75 0%,var(--bg1) 38%,var(--bg0) 100%);
  color:var(--ink); user-select:none;-webkit-user-select:none; touch-action:manipulation;
}
#app{position:relative;width:100%;max-width:480px;height:100vh;height:100dvh;margin:0 auto;display:flex;flex-direction:column;overflow:hidden}
.screen{position:absolute;inset:0;display:flex;flex-direction:column}
.screen[hidden]{display:none}
button{font-family:inherit;cursor:pointer;border:none;color:inherit}

/* ============ 首页 ============ */
#home{justify-content:center;align-items:center;text-align:center;padding:20px 26px;z-index:2}
.home-rain{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.home-rain span{position:absolute;top:-8%;display:flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:10px;font-weight:600;font-size:20px;opacity:0;
  animation:rainFall linear infinite;box-shadow:0 6px 14px rgba(0,0,0,.28)}
@keyframes rainFall{0%{transform:translateY(-10vh) rotate(-10deg);opacity:0}
  10%{opacity:.32}88%{opacity:.32}100%{transform:translateY(118vh) rotate(12deg);opacity:0}}
.home-kicker{font-size:13px;letter-spacing:.32em;color:var(--gold);font-weight:600;margin-bottom:9px}
.home-title{font-size:clamp(38px,11vw,50px);font-weight:700;line-height:1.08;letter-spacing:1px;
  white-space:nowrap;
  background:linear-gradient(180deg,#fff0b8,var(--gold) 55%,var(--gold-deep));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  filter:drop-shadow(0 6px 22px rgba(255,190,60,.35))}
.home-sub{margin-top:8px;font-size:15px;color:var(--ink-dim);font-weight:500}
.diff-label{font-size:11.5px;color:var(--ink-dim);font-weight:600;letter-spacing:.14em;margin-top:14px}
.diff-row{display:flex;gap:6px;margin:6px 0 2px;justify-content:center;flex-wrap:wrap}
.diff-btn{padding:6px 13px;border-radius:999px;font-size:13.5px;font-weight:600;
  background:rgba(255,255,255,.07);border:1px solid var(--panel-line);color:var(--ink-dim);transition:all .15s}
.diff-btn.active{background:linear-gradient(180deg,#b3dcff,#69b0f5);color:#103a66;border-color:transparent;
  box-shadow:0 4px 14px rgba(105,176,245,.35)}
.diff-btn:active{transform:scale(.94)}
.lang-row{display:flex;gap:8px;margin:10px 0 2px;justify-content:center}
.lang-btn{padding:7px 16px;border-radius:999px;font-size:13.5px;font-weight:600;
  background:rgba(255,255,255,.07);border:1px solid var(--panel-line);color:var(--ink-dim);transition:all .15s}
.lang-btn.active{background:linear-gradient(180deg,var(--gold),var(--gold-deep));color:#4d3405;border-color:transparent;
  box-shadow:0 4px 14px rgba(255,170,40,.3)}
.lang-btn:active{transform:scale(.95)}
.howto{margin:14px 0 14px;width:100%;display:flex;flex-direction:column;gap:7px}
.howto .row{display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.06);
  border:1px solid var(--panel-line);border-radius:15px;padding:9px 13px;text-align:left}
.howto .n{flex:none;width:28px;height:28px;border-radius:50%;background:linear-gradient(180deg,var(--gold),var(--gold-deep));
  color:#5a3d05;font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:center}
.howto .t{font-size:13.5px;line-height:1.45;color:#dfe2ff;font-weight:500}
.btn-primary{width:100%;padding:15px;border-radius:17px;font-size:18px;font-weight:700;letter-spacing:2px;
  background:linear-gradient(180deg,#ffe27a,var(--gold) 45%,var(--gold-deep));color:#4d3405;
  box-shadow:0 10px 26px rgba(255,170,40,.35),inset 0 2px 0 rgba(255,255,255,.7);transition:transform .12s}
.btn-primary:active{transform:scale(.96)}
.home-best{margin-top:12px;font-size:13px;color:var(--ink-dim);font-weight:500}
/* ============ 关卡选择 ============ */
.level-pick{margin-top:13px;width:100%}
.level-pick-title{font-size:12px;color:var(--ink-dim);font-weight:600;letter-spacing:.1em;margin-bottom:8px;text-align:center}
.level-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:7px}
.lv{position:relative;height:38px;border-radius:11px;font-size:15px;font-weight:700;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.07);border:1px solid var(--panel-line);color:var(--ink);transition:transform .12s}
.lv:active{transform:scale(.92)}
.lv.done{background:rgba(84,224,164,.12);border-color:rgba(84,224,164,.4);color:var(--green)}
.lv.next{background:linear-gradient(180deg,#ffe27a,var(--gold) 45%,var(--gold-deep));color:#4d3405;border-color:transparent;
  box-shadow:0 4px 12px rgba(255,170,40,.3)}
.lv.locked{color:rgba(255,255,255,.28);background:rgba(255,255,255,.03);cursor:not-allowed}
.lv.locked svg{width:13px;height:13px;fill:rgba(255,255,255,.32)}

/* ============ HUD ============ */
#game{z-index:1}
.hud{flex:none;display:flex;align-items:center;gap:8px;padding:12px 14px 8px}
.hud .pill{background:rgba(255,255,255,.07);border:1px solid var(--panel-line);border-radius:13px;
  padding:6px 12px;font-size:14px;font-weight:600;line-height:1.2}
.hud .pill small{display:block;font-size:10px;color:var(--ink-dim);font-weight:500;letter-spacing:.06em}
.hud .spacer{flex:1}
.icon-btn{flex:none;width:39px;height:39px;border-radius:12px;background:rgba(255,255,255,.07);
  border:1px solid var(--panel-line);display:flex;align-items:center;justify-content:center}
.icon-btn:active{transform:scale(.92)}
.icon-btn svg{width:19px;height:19px;fill:var(--ink)}
.case-btn{font-size:15px;font-weight:700;color:var(--ink-dim);line-height:1}
.case-btn.active{background:linear-gradient(180deg,var(--gold),var(--gold-deep));color:#4d3405;border-color:transparent;
  box-shadow:0 4px 14px rgba(255,170,40,.3)}

/* ============ 顶部目标单词卡 ============ */
.target-card{flex:none;margin:0 12px 9px;display:flex;align-items:center;gap:11px;
  background:linear-gradient(180deg,#282c66,#1d2049);border:1px solid var(--panel-line);
  border-radius:18px;padding:9px 12px;box-shadow:0 8px 22px rgba(0,0,0,.3)}
.speaker{flex:none;width:52px;height:52px;border-radius:50%;position:relative;
  background:linear-gradient(180deg,#ffe27a,var(--gold) 45%,var(--gold-deep));
  box-shadow:0 5px 16px rgba(255,170,40,.42),inset 0 2px 0 rgba(255,255,255,.7);
  display:flex;align-items:center;justify-content:center;transition:transform .12s}
.speaker:active{transform:scale(.9)}
.speaker svg{width:25px;height:25px;fill:#5a3d05;position:relative;z-index:2}
.speaker .wave{position:absolute;border:2px solid rgba(255,213,74,.7);border-radius:50%;
  width:52px;height:52px;opacity:0;pointer-events:none}
.speaker.playing .wave{animation:waveRing .9s ease-out}
.speaker.playing .wave.w2{animation-delay:.18s}
.speaker.playing .wave.w3{animation-delay:.36s}
@keyframes waveRing{0%{opacity:.85;transform:scale(1)}100%{opacity:0;transform:scale(1.9)}}
.t-main{flex:1;min-width:0}
.t-mean{font-size:13.5px;font-weight:600;color:var(--ink-dim);margin-bottom:5px;line-height:1.2;min-height:16px}
.target-card.listen-only .t-mean{display:none}
.t-slots{display:flex;gap:4px;flex-wrap:wrap}
.t-slots i{width:26px;height:34px;border-radius:9px;border:2px dashed rgba(255,255,255,.22);
  background:rgba(255,255,255,.04);display:flex;align-items:center;justify-content:center;
  font-style:normal;font-weight:700;font-size:19px;color:#47330f}
.t-slots i.next{border-color:var(--gold);animation:nextPulse .85s ease-in-out infinite}
@keyframes nextPulse{0%,100%{box-shadow:0 0 0 0 rgba(255,213,74,0)}50%{box-shadow:0 0 12px 2px rgba(255,213,74,.55)}}
.t-slots i.filled{border-style:solid;border-color:#d69a34;background:linear-gradient(180deg,#ffe9a8,#f6c456);
  animation:slotPop .3s cubic-bezier(.2,1.5,.4,1)}
@keyframes slotPop{0%{transform:scale(.3)}70%{transform:scale(1.18)}100%{transform:scale(1)}}
.target-card.done .t-slots i{border-color:var(--gold);animation:slotGlow .5s ease-in-out infinite alternate}
@keyframes slotGlow{from{box-shadow:0 0 6px 1px rgba(255,213,74,.5)}to{box-shadow:0 0 18px 5px rgba(255,213,74,.9)}}
.t-prog{flex:none;align-self:flex-start;font-size:12px;font-weight:600;color:var(--ink-dim);padding-top:2px}
@media (min-width:400px){.t-slots i{width:29px;height:37px;font-size:21px}}
@media (min-width:460px){.t-slots i{width:32px;height:40px;font-size:23px}}

/* ============ 掉落场区 ============ */
.field-wrap{flex:1;min-height:0;padding:0 12px 14px}
#field{position:relative;width:100%;height:100%;border-radius:22px;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.012)),
    radial-gradient(rgba(255,255,255,.10) 1.3px,transparent 1.4px) 0 0/26px 26px,
    linear-gradient(180deg,#20244f,#181b3d);
  border:1px solid var(--panel-line);
  box-shadow:inset 0 2px 14px rgba(0,0,0,.35),0 12px 30px rgba(0,0,0,.28)}
#fx{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:40}
.danger-zone{position:absolute;left:0;right:0;top:0;height:calc(var(--cell,48px) * 1.4);z-index:1;
  background:linear-gradient(180deg,rgba(255,90,90,.13),transparent);
  border-bottom:2px dashed rgba(255,110,110,.4);opacity:.35;transition:opacity .3s}
#field.hot .danger-zone{opacity:1;animation:dangerBlink .8s ease-in-out infinite}
@keyframes dangerBlink{0%,100%{background:linear-gradient(180deg,rgba(255,90,90,.12),transparent)}
  50%{background:linear-gradient(180deg,rgba(255,90,90,.32),transparent)}}
.floor-glow{position:absolute;left:0;right:0;bottom:0;height:6px;z-index:1;
  background:linear-gradient(90deg,transparent,rgba(255,213,74,.35),transparent)}
.card{position:absolute;left:0;top:0;display:flex;align-items:center;justify-content:center;
  border-radius:20%;font-weight:700;color:#47330f;z-index:5;touch-action:none;cursor:pointer;
  will-change:transform;transform:translate3d(0,0,0) translate(-50%,-50%);
  box-shadow:0 4px 0 var(--edge),0 8px 14px rgba(5,6,24,.42),inset 0 2px 3px rgba(255,255,255,.75),inset 0 -3px 5px rgba(0,0,0,.12);
  background:linear-gradient(180deg,var(--c1),var(--c2))}
.card .ch{line-height:1;transform:translateY(-3%)}
.card.enter{animation:cardIn .25s ease-out}
@keyframes cardIn{from{opacity:0}to{opacity:1}}
.card.settled{z-index:2;filter:saturate(.5) brightness(.82);
  box-shadow:0 2px 0 var(--edge),inset 0 2px 3px rgba(255,255,255,.4);cursor:default}
.card.landed{animation:landSquash .18s ease-out}
@keyframes landSquash{0%{margin-top:-4px}60%{margin-top:2px}100%{margin-top:0}}
.card.bad{animation:badShake .32s}
@keyframes badShake{0%,100%{margin-left:0}20%{margin-left:-5px}40%{margin-left:5px}
  60%{margin-left:-4px}80%{margin-left:4px}}
.card.row-clear{animation:rowClear .3s ease-in forwards;pointer-events:none}
@keyframes rowClear{to{transform:translate3d(0,30px,0) translate(-50%,-50%) scale(.2) rotate(20deg);opacity:0}}
.flyer{position:fixed;left:0;top:0;z-index:70;display:flex;align-items:center;justify-content:center;
  border-radius:20%;font-weight:700;color:#47330f;pointer-events:none;transform:translate(-50%,-50%);
  box-shadow:0 6px 18px rgba(5,6,24,.5),inset 0 2px 3px rgba(255,255,255,.75),inset 0 -3px 5px rgba(0,0,0,.12);
  background:linear-gradient(180deg,var(--c1),var(--c2));
  transition:left .3s cubic-bezier(.2,1.25,.4,1),top .3s cubic-bezier(.2,1.25,.4,1),transform .3s cubic-bezier(.2,1.25,.4,1)}
.float-word{position:absolute;z-index:45;pointer-events:none;font-weight:700;letter-spacing:.12em;
  color:var(--gold);text-shadow:0 0 18px rgba(255,213,74,.95),0 2px 4px rgba(0,0,0,.5);
  animation:floatWord 1.1s ease forwards}
@keyframes floatWord{0%{opacity:0;transform:translate(-50%,-50%) scale(.5)}25%{opacity:1;transform:translate(-50%,-70%) scale(1.12)}
  75%{opacity:1;transform:translate(-50%,-130%) scale(1)}100%{opacity:0;transform:translate(-50%,-180%) scale(1)}}
.hint-bubble{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);z-index:50;
  background:rgba(20,22,52,.92);border:1px solid rgba(255,213,74,.5);color:#fff4d0;
  font-size:13px;font-weight:500;padding:9px 15px;border-radius:14px;white-space:nowrap;
  box-shadow:0 8px 22px rgba(0,0,0,.4);animation:hintBob 1.6s ease-in-out infinite}
@keyframes hintBob{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(-6px)}}

/* ============ 弹层 ============ */
.overlay{position:absolute;inset:0;z-index:80;display:flex;align-items:center;justify-content:center;
  background:rgba(10,11,30,.66);backdrop-filter:blur(4px);padding:28px}
.overlay[hidden]{display:none}
.modal{width:100%;background:linear-gradient(180deg,#262a63,#1c1f49);border:1px solid var(--panel-line);
  border-radius:26px;padding:28px 26px 24px;text-align:center;box-shadow:0 24px 60px rgba(0,0,0,.55);
  animation:modalIn .4s cubic-bezier(.2,1.3,.4,1)}
@keyframes modalIn{from{transform:scale(.7) translateY(30px);opacity:0}to{transform:scale(1) translateY(0);opacity:1}}
.modal h2{font-size:27px;font-weight:700;color:var(--gold);margin-bottom:4px}
.modal.over h2{color:var(--red)}
.modal .sub{font-size:13.5px;color:var(--ink-dim);font-weight:500;margin-bottom:16px}
.stars{display:flex;justify-content:center;gap:10px;margin:6px 0 16px}
.stars svg{width:50px;height:50px;fill:#3a3e6e;transform:scale(0);transition:transform .3s cubic-bezier(.2,1.6,.4,1)}
.stars svg.on{fill:var(--gold);filter:drop-shadow(0 0 12px rgba(255,213,74,.7))}
.stars svg.on.show{transform:scale(1)}
.stats{display:flex;gap:9px;margin-bottom:20px}
.stats .cell{flex:1;background:rgba(255,255,255,.06);border:1px solid var(--panel-line);border-radius:14px;padding:10px 5px;min-width:0}
.stats .cell b{display:block;font-size:19px;font-weight:700;color:#fff}
.stats .cell small{font-size:11px;color:var(--ink-dim);font-weight:500}
.modal .btn-primary{width:100%;margin-bottom:9px}
.btn-ghost{width:100%;padding:13px;border-radius:16px;background:transparent;border:1px solid var(--panel-line);
  font-size:15px;font-weight:600;color:var(--ink-dim)}
.btn-ghost:active{transform:scale(.97)}
.toast{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.9);z-index:90;
  background:rgba(20,22,52,.95);border:1px solid var(--panel-line);border-radius:14px;padding:12px 22px;
  font-size:15px;font-weight:600;opacity:0;pointer-events:none;transition:all .25s}
.toast.show{opacity:1;transform:translate(-50%,-50%) scale(1)}
@media (min-width:600px){#app{border-left:1px solid rgba(255,255,255,.08);border-right:1px solid rgba(255,255,255,.08)}}