/* 青柠单词岛 —— 马卡龙绿主题 */
:root{
  --mint:#A8E6CF;
  --mint-deep:#6FD3AE;
  --mint-dark:#2E8F72;
  --mint-soft:#E6F9F1;
  --cream:#FBFEF9;
  --ink:#2C3A35;
  --ink-soft:#6C8379;
  --pink:#FF9EC4;
  --pink-deep:#F4739F;
  --shadow:0 8px 22px rgba(46,143,114,.13);
  --shadow-sm:0 3px 10px rgba(46,143,114,.10);
  --radius:20px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--cream);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}

/* ================= 首页 ================= */
.screen{display:none;}
.screen.active{display:block;}
#home{
  min-height:100vh;
  padding:28px 18px 40px;
  position:relative;
  overflow:hidden;
}
.home-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(circle at 12% 8%, rgba(168,230,207,.85), transparent 46%),
    radial-gradient(circle at 88% 16%, rgba(255,216,232,.75), transparent 42%),
    radial-gradient(circle at 50% 100%, rgba(168,230,207,.5), transparent 55%),
    var(--cream);
}
.home-head{position:relative;z-index:1;text-align:center;padding-top:12px;}
.logo{font-size:44px;line-height:1;filter:drop-shadow(0 5px 10px rgba(46,143,114,.25));}
.home-head h1{
  margin:10px 0 6px;font-size:32px;letter-spacing:3px;
  color:var(--mint-dark);
  text-shadow:0 2px 0 #fff;
}
.home-head .sub{margin:0;font-size:13px;color:var(--ink-soft);letter-spacing:.5px;}

.btn-start{
  position:relative;z-index:1;
  display:flex;align-items:center;justify-content:center;gap:10px;
  width:100%;max-width:420px;margin:26px auto 22px;
  padding:20px 26px;border-radius:26px;
  font-size:23px;font-weight:800;letter-spacing:2px;color:#fff;
  background:linear-gradient(135deg,#7FDCB8,#4FC79B);
  box-shadow:0 10px 26px rgba(79,199,155,.45), inset 0 -4px 0 rgba(0,0,0,.07);
  transition:transform .12s ease, box-shadow .12s ease;
}
.btn-start:active{transform:translateY(3px) scale(.99);box-shadow:0 4px 12px rgba(79,199,155,.4);}
.btn-start .play{font-size:19px;}

.grade-tabs{
  position:relative;z-index:1;
  display:flex;gap:8px;justify-content:center;margin-bottom:14px;
}
.grade-tab{
  padding:9px 20px;border-radius:999px;font-size:14px;font-weight:700;
  background:#fff;color:var(--ink-soft);box-shadow:var(--shadow-sm);
  transition:.18s;
}
.grade-tab.active{
  background:linear-gradient(135deg,#7FDCB8,#4FC79B);color:#fff;
  box-shadow:0 6px 16px rgba(79,199,155,.38);
}

.unit-tags{
  position:relative;z-index:1;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(88px,1fr));gap:9px;
  max-width:520px;margin:0 auto;
}
.unit-tag{
  padding:11px 8px;border-radius:16px;font-size:13.5px;font-weight:700;
  background:#fff;color:var(--mint-dark);
  box-shadow:var(--shadow-sm);
  border:1.5px solid rgba(168,230,207,.7);
  transition:.16s;
  /* 用 grid 等宽排列，Starter Unit 1 这类长名字不会把整行挤歪 */
  text-align:center;box-sizing:border-box;
}
.unit-tag:active{transform:scale(.96);}
.unit-tag small{display:block;font-size:10.5px;font-weight:600;color:var(--ink-soft);letter-spacing:.3px;margin-top:2px;}
.home-tip{
  position:relative;z-index:1;text-align:center;
  font-size:12px;color:var(--ink-soft);margin-top:22px;
}

/* ================= 关卡选择弹层 ================= */
.overlay{
  position:fixed;inset:0;z-index:50;display:none;
  background:rgba(44,58,53,.42);backdrop-filter:blur(3px);
  padding:14px;overflow-y:auto;
}
.overlay.show{display:flex;align-items:flex-start;justify-content:center;}
.overlay-card{
  position:relative;width:100%;max-width:520px;margin:auto;
  background:#fff;border-radius:24px;padding:22px 18px 24px;
  box-shadow:0 18px 44px rgba(44,58,53,.28);
}
.overlay-close{
  position:absolute;top:12px;right:12px;width:34px;height:34px;
  border-radius:50%;background:var(--mint-soft);color:var(--mint-dark);
  font-size:15px;font-weight:700;
}
.overlay-card h2{
  margin:0 0 16px;font-size:17px;color:var(--mint-dark);letter-spacing:1px;
}
.picker-group{margin-bottom:18px;}
.picker-group:last-child{margin-bottom:0;}
.picker-label{font-size:12.5px;font-weight:800;color:var(--ink-soft);margin-bottom:9px;letter-spacing:.5px;}
.picker-grid{display:flex;flex-wrap:wrap;gap:8px;}
.picker-unit{
  padding:9px 13px;border-radius:13px;font-size:13px;font-weight:700;
  background:var(--mint-soft);color:var(--mint-dark);border:1.5px solid transparent;
}
.picker-unit.active{background:linear-gradient(135deg,#7FDCB8,#4FC79B);color:#fff;}
.picker-level{
  min-width:64px;padding:11px 10px;border-radius:14px;text-align:center;
  background:var(--mint-soft);color:var(--mint-dark);
  font-size:12px;font-weight:800;line-height:1.5;
}
.picker-level small{display:block;font-size:10px;font-weight:600;color:var(--ink-soft);}
.picker-level:active{transform:scale(.96);}

/* ================= 游戏页 ================= */
#game{padding-bottom:calc(104px + env(safe-area-inset-bottom));}
.game-head{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  padding:9px 12px 8px;
  background:rgba(251,254,249,.95);
  backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(168,230,207,.6);
}
.btn-ghost{order:1;}
.btn-levels{order:2;margin-left:auto;}
.btn-ghost{
  padding:8px 12px;border-radius:12px;font-size:13px;font-weight:700;
  background:var(--mint-soft);color:var(--mint-dark);white-space:nowrap;
}
.game-title{
  order:3;flex:1 1 100%;text-align:center;min-width:0;
  margin-top:1px;
}
.game-title strong{
  display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;
  overflow:hidden;color:var(--mint-dark);
  /* 单元名长短差异大（Starter Unit vs 长单元名），留出两行，不再硬截断 */
  font-size:clamp(17px,5vw,22px);line-height:1.2;letter-spacing:.3px;
  word-break:break-word;
}
.game-title strong em{font-style:normal;color:var(--pink-deep);}
.game-title #levelSub{
  display:block;font-size:11.5px;font-weight:600;
  color:var(--ink-soft);margin-top:3px;letter-spacing:.3px;
}
.btn-levels{
  padding:8px 12px;border-radius:12px;font-size:13px;font-weight:800;
  background:linear-gradient(135deg,#7FDCB8,#4FC79B);color:#fff;white-space:nowrap;
  box-shadow:0 4px 12px rgba(79,199,155,.34);
}
.status-bar{
  margin:10px 12px 0;padding:10px 14px;border-radius:14px;
  font-size:12.5px;font-weight:600;color:var(--mint-dark);
  background:linear-gradient(135deg,rgba(168,230,207,.42),rgba(255,216,232,.32));
  text-align:center;
}
.status-bar.ok{background:linear-gradient(135deg,rgba(168,230,207,.7),rgba(168,230,207,.4));}
.status-bar.done{background:linear-gradient(135deg,rgba(255,216,232,.72),rgba(255,216,232,.5));color:#B5497A;}

.cards{
  display:grid;grid-template-columns:1fr 1fr;gap:11px;
  padding:12px;max-width:560px;margin:0 auto;
}
/* 词很少的关卡：单列大卡，避免页面空荡 */
.cards.sparse{grid-template-columns:1fr;max-width:380px;}

.card{
  position:relative;
  background:#fff;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);
  border:1.5px solid rgba(168,230,207,.55);
  display:flex;flex-direction:column;
  transition:border-color .2s;
}
.card.right{border-color:#4FC79B;}
.card.wrong{border-color:#FF9EC4;}

/* 插画区 */
.art{
  position:relative;width:100%;aspect-ratio:1/1;overflow:hidden;
  background:var(--mint-soft);
}
.art > svg{position:absolute;inset:0;display:block;width:100%;height:100%;}

/* 遮住按钮（图片右上角） */
.cover-pill{
  position:absolute;top:6px;right:6px;z-index:5;
  padding:4px 9px;border-radius:999px;
  font-size:10.5px;font-weight:800;letter-spacing:.3px;
  background:rgba(255,255,255,.92);color:var(--mint-dark);
  box-shadow:0 2px 7px rgba(44,58,53,.18);
  transition:transform .1s;
}
.cover-pill:active{transform:scale(.94);}
.cover-pill.on{background:#2C3A35;color:#E6F9F1;}

/* 单词 + 音标 + 中文（叠在插画底部） */
.word-line{
  position:absolute;left:0;right:0;bottom:0;z-index:4;
  display:flex;align-items:center;gap:5px;
  padding:4px 6px 6px;
  background:linear-gradient(to top,rgba(255,255,255,.98),rgba(255,255,255,.93) 58%,rgba(255,255,255,0));
}
.word-wrap{position:relative;flex:1;min-width:0;border-radius:9px;padding:1px;}
.word-block{display:block;text-align:center;}
.art-word{
  display:block;font-weight:900;letter-spacing:.2px;color:#1F4E3E;
  font-size:clamp(11px,3.4vw,15px);
  line-height:1.22;word-break:break-word;overflow-wrap:anywhere;
}
.art-phon{
  display:block;margin-top:1px;
  font-size:clamp(8.5px,2.4vw,10.5px);color:#3E6B5B;font-weight:600;
  line-height:1.25;word-break:break-word;overflow-wrap:anywhere;
}
.art-phon.empty{color:#96AAA1;}
.art-zh{
  display:block;margin-top:2px;
  font-size:clamp(9px,2.5vw,11px);color:#557066;font-weight:700;
  line-height:1.2;letter-spacing:.2px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* 遮罩：盖住单词与音标 */
.mask{
  position:absolute;inset:0;border-radius:9px;z-index:6;
  background:linear-gradient(135deg,#2C3A35,#41564E);
  display:none;flex-direction:column;align-items:center;justify-content:center;
  color:#D6F5E9;font-size:11.5px;font-weight:800;letter-spacing:1px;
  text-align:center;box-shadow:0 3px 10px rgba(44,58,53,.3);
}
.mask.show{display:flex;}
.mask small{display:block;font-size:9px;font-weight:500;opacity:.7;margin-top:2px;letter-spacing:0;}

/* 学习区 */
.learn{
  padding:9px 9px 10px;display:flex;flex-direction:column;gap:8px;flex:1;
}
.row{display:flex;align-items:center;gap:8px;}
.btn-say{
  position:relative;z-index:7;
  flex:0 0 auto;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#FFB3D2,#FF8CB8);
  box-shadow:0 4px 12px rgba(244,115,159,.38), inset 0 -2px 0 rgba(0,0,0,.06);
  transition:transform .1s;
}
.btn-say:active{transform:scale(.9);}
.btn-say > svg{position:static;display:block;width:22px;height:22px;fill:#fff;}
.btn-say .say-ico{width:22px;height:22px;display:block;fill:#fff;}
.btn-say.playing{animation:pulse .9s ease-in-out infinite;}
@keyframes pulse{
  0%,100%{box-shadow:0 4px 12px rgba(244,115,159,.38);}
  50%{box-shadow:0 4px 20px rgba(244,115,159,.85);}
}
.tip-small{font-size:10.5px;color:var(--ink-soft);line-height:1.4;flex:1;}

/* 话筒测评 */
.mic-wrap{display:flex;align-items:center;gap:8px;}
.btn-mic{
  flex:0 0 auto;width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#B6E9D6,#7FDCB8);
  box-shadow:0 4px 12px rgba(79,199,155,.34), inset 0 -2px 0 rgba(0,0,0,.05);
  transition:transform .1s;
}
.btn-mic:active{transform:scale(.9);}
.btn-mic svg{width:20px;height:20px;fill:#fff;}
.btn-mic.rec{animation:pulseMic .8s ease-in-out infinite;background:linear-gradient(135deg,#FFC7DC,#FF9EC4);}
@keyframes pulseMic{0%,100%{transform:scale(1);}50%{transform:scale(1.1);}}
.mic-info{flex:1;min-width:0;}
.mic-score{font-size:12.5px;font-weight:800;color:var(--mint-dark);line-height:1.3;}
.mic-score b{font-size:15px;}
.mic-score .good{color:#2E9E76;}
.mic-score .mid{color:#D9A22B;}
.mic-score .bad{color:#F4739F;}
.mic-score .idle{color:var(--ink-soft);font-weight:600;font-size:10.5px;}
/* 录音回放自评的小按钮（微信 / 无识别环境） */
.mic-info .mini-btn{
  display:inline-block;margin:4px 4px 0 0;padding:5px 9px;
  border-radius:9px;font-size:11px;font-weight:800;
  background:#EFF9F5;color:var(--mint-dark);
  border:1.4px solid rgba(168,230,207,.9);
  line-height:1.2;
}
.mic-info .mini-btn:active{transform:scale(.96);}
.mic-info .mini-btn.ok{background:linear-gradient(135deg,#B6E9D6,#7FDCB8);color:#fff;border-color:transparent;}
.mic-info .mini-btn.again{background:#FFF3F8;color:var(--pink-deep);border-color:rgba(255,158,196,.85);}
.mic-info .self-actions{margin-top:2px;}

/* 默写区 */
.dict-wrap{position:relative;}
.dict-input{
  width:100%;margin-top:7px;padding:10px 11px;
  border-radius:12px;border:1.8px solid rgba(168,230,207,.85);
  background:#FCFFFD;
  font-size:14px;font-weight:700;color:var(--ink);letter-spacing:.4px;
  outline:none;transition:.16s;
}
.dict-input::placeholder{color:#B9C9C2;font-weight:500;font-size:11.5px;letter-spacing:0;}
.dict-input:focus{border-color:var(--mint-deep);box-shadow:0 0 0 3px rgba(168,230,207,.35);}
/* 未遮住时：输入框本身就是「遮住」开关，点一下就遮词 */
/* 未遮住时的「待遮」态：用 class 而不是 :disabled，
   因为微信 X5 里 disabled 输入框会吞掉点击，导致「点一下遮住」失灵 */
.dict-input.is-locked{
  background:#F3F7F5;color:#9DB0A8;
  pointer-events:none;
  border-style:dashed;border-color:rgba(168,230,207,.95);
}
.dict-input[readonly]{
  background:#F3F7F5;color:#9DB0A8;
  border-style:dashed;border-color:rgba(168,230,207,.95);
}
.dict-wrap.is-coverable{cursor:pointer;}
.dict-wrap.is-coverable:active{transform:scale(.99);}
.mark-badge{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-size:19px;display:none;z-index:2;
}
.mark-badge.show{display:block;}

/* ================= 底部栏 ================= */
.bottom-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:30;
  padding:9px 12px calc(9px + env(safe-area-inset-bottom));
  background:rgba(251,254,249,.96);
  backdrop-filter:blur(10px);
  border-top:1px solid rgba(168,230,207,.7);
}
.score-line{
  text-align:center;font-size:12px;font-weight:800;color:var(--mint-dark);
  min-height:0;overflow:hidden;transition:.2s;
  padding-bottom:0;
}
.score-line.show{padding-bottom:6px;}
.score-line em{font-style:normal;color:var(--pink-deep);}
.bottom-actions{display:flex;gap:9px;justify-content:center;}
.btn-main,.btn-alt{
  padding:14px 26px;border-radius:17px;
  font-size:16px;font-weight:800;letter-spacing:1px;
  transition:transform .1s;
}
.btn-main{
  background:linear-gradient(135deg,#7FDCB8,#4FC79B);color:#fff;
  box-shadow:0 6px 18px rgba(79,199,155,.42);
}
.btn-alt{
  background:#fff;color:var(--mint-dark);
  border:1.8px solid rgba(111,211,174,.85);
  box-shadow:var(--shadow-sm);
}
.btn-main:active,.btn-alt:active{transform:scale(.97);}
.hide{display:none !important;}

/* ================= toast ================= */
.toast{
  position:fixed;left:50%;bottom:calc(120px + env(safe-area-inset-bottom));transform:translate(-50%,14px);
  z-index:90;max-width:86vw;
  padding:11px 18px;border-radius:14px;
  background:rgba(44,58,53,.94);color:#fff;
  font-size:13px;font-weight:600;line-height:1.45;text-align:center;
  opacity:0;pointer-events:none;transition:.25s;
}
.toast.show{opacity:1;transform:translate(-50%,0);}

/* 小屏微调 */
@media (max-width:360px){
  .btn-say{width:38px;height:38px;}
  .cover-pill{font-size:9.5px;padding:3px 7px;}
  .btn-mic{width:36px;height:36px;}
  .card{border-radius:17px;}
}

/* ================= 移动端 / 微信适配 ================= */
/* 输入框字号 <16px 时 iOS 会自动放大页面，安卓部分机型也会；用 16px 兜住 */
@media (max-width:520px){
  .dict-input{font-size:16px;}
  .dict-input::placeholder{font-size:12px;}
}

/* 微信 X5 不支持 dvh 时回退到 100vh，避免地址栏收缩导致内容被切 */
@supports (height: 100dvh){
  #home{min-height:100dvh;}
}

/* 微信里长按会被识别成「保存图片/翻译」，单词卡片只允许点按 */
.card, .mini-btn, .btn-say, .btn-mic{
  -webkit-touch-callout:none;
  -webkit-user-select:none;
  user-select:none;
}
/* 但默写输入框必须能正常输入、选中 */
.dict-input{
  -webkit-user-select:text;
  user-select:text;
}