/* ============================================================
   背诵任务：任务面板 / 词卡 / 完成页
   ============================================================ */
.rc-root{width:100%;max-width:640px;margin:0 auto}
.rc-dash[hidden],.rc-empty[hidden],.rc-session[hidden],.rc-done[hidden]{display:none !important}

/* ---------- 任务面板 ---------- */
.rc-hero{
  position:relative;overflow:hidden;color:#fff;
  border-radius:24px;padding:18px 16px 16px;
  background:linear-gradient(140deg,#0d9488 0%,#14b8a6 52%,#06b6d4 100%);
  box-shadow:0 14px 34px rgba(13,148,136,.22);
}
.rc-hero::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(240px 120px at 92% -12%,rgba(255,255,255,.3),transparent 64%),
    radial-gradient(180px 130px at 2% 112%,rgba(255,255,255,.14),transparent 60%);
}
.rc-hero > *{position:relative;z-index:1}
.rc-hero-top{display:flex;align-items:center;justify-content:space-between;gap:8px}
.rc-eyebrow{font-size:9px;font-weight:800;letter-spacing:1.6px;color:rgba(255,255,255,.78)}
.rc-streak{
  padding:4px 9px;border-radius:999px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);
  font-size:10px;font-weight:700;color:#fff;white-space:nowrap;
}
.rc-hero-main{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-top:12px}
.rc-due{display:flex;align-items:baseline;gap:7px;min-width:0}
.rc-due b{font-size:52px;font-weight:800;letter-spacing:-2px;line-height:.95}
.rc-due span{font-size:11.5px;font-weight:600;color:rgba(255,255,255,.85)}
.rc-ring{
  position:relative;flex:0 0 76px;width:76px;height:76px;border-radius:50%;
  display:grid;place-items:center;
  background:conic-gradient(#fff var(--deg,0deg),rgba(255,255,255,.22) 0);
}
.rc-ring::before{
  content:'';position:absolute;inset:7px;border-radius:50%;
  background:#0e958a;
  box-shadow:inset 0 0 14px rgba(0,0,0,.08);
}
.rc-ring span{position:relative;z-index:1;font-size:12px;font-weight:800;letter-spacing:.2px}
.rc-hero-desc{
  margin:11px 0 13px;font-size:11.5px;line-height:1.65;
  color:rgba(255,255,255,.9);font-weight:600;
}

.rc-primary{
  display:flex;align-items:center;justify-content:center;gap:6px;
  width:100%;height:46px;border:0;border-radius:14px;cursor:pointer;
  background:linear-gradient(135deg,#0d9488,#06b6d4);color:#fff;
  font-size:14.5px;font-weight:800;font-family:inherit;text-decoration:none;
  box-shadow:0 8px 20px rgba(13,148,136,.18);
  transition:transform .12s;
}
.rc-primary:active{transform:scale(.985)}
.rc-hero .rc-primary{
  background:#fff;color:#0d9488;
  box-shadow:0 6px 18px rgba(6,78,72,.18);
}
.rc-free-btn{
  width:100%;margin-top:8px;padding:5px 0;border:0;background:transparent;
  color:rgba(255,255,255,.9);font-size:11px;font-weight:700;font-family:inherit;
  cursor:pointer;text-decoration:underline;text-underline-offset:3px;
}
.rc-free-btn[hidden]{display:none}
.rc-free-btn:active{opacity:.7}

.rc-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}
.rc-stat{
  padding:12px 6px;border-radius:16px;text-align:center;
  background:var(--v2-card);border:1px solid var(--v2-border-light);
  box-shadow:var(--v2-shadow-sm);
}
.rc-stat b{display:block;font-size:21px;font-weight:800;line-height:1.2;letter-spacing:-.4px;color:#0f766e}
.rc-stat span{display:block;margin-top:2px;font-size:9.5px;font-weight:600;color:var(--v2-text-tertiary)}

.rc-today{
  display:flex;align-items:center;gap:8px;margin-top:10px;padding:11px 13px;
  border-radius:14px;background:var(--v2-card);border:1px solid var(--v2-border-light);
  font-size:10.5px;line-height:1.5;color:var(--v2-text-secondary);
}
.rc-today-dot{
  flex:0 0 7px;width:7px;height:7px;border-radius:50%;background:#14b8a6;
  box-shadow:0 0 0 3px rgba(20,184,166,.13);
}

.rc-plan{
  margin-top:14px;padding:14px;border-radius:18px;
  background:var(--v2-card);border:1px solid var(--v2-border-light);
  box-shadow:var(--v2-shadow-sm);
}
.rc-plan-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:11px}
.rc-plan-title{font-size:13px;font-weight:800;color:var(--v2-text)}
.rc-plan-head span{
  padding:3px 7px;border-radius:999px;background:rgba(20,184,166,.1);
  color:#0f766e;font-size:9px;font-weight:800;white-space:nowrap;
}
.rc-plan-track{
  display:flex;align-items:center;gap:3px;
  overflow-x:auto;padding-bottom:2px;scrollbar-width:none;
}
.rc-plan-track::-webkit-scrollbar{display:none}
.rc-plan-track span{font-size:8.5px;font-weight:700;color:var(--v2-text-tertiary);white-space:nowrap}
.rc-plan-track i{
  flex:1;min-width:5px;height:1px;
  background:linear-gradient(90deg,rgba(20,184,166,.22),rgba(20,184,166,.55));
}
.rc-plan p{margin:9px 0 0;font-size:10.5px;line-height:1.7;color:var(--v2-text-tertiary)}
.rc-next{margin-top:9px;font-size:10.5px;font-weight:700;color:#0f766e}

/* ---------- 背诵词卡 ---------- */
.rc-session{padding-top:3px}
.rc-session-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:9px}
.rc-exit{
  height:32px;padding:0 10px;border-radius:10px;cursor:pointer;
  border:1px solid var(--v2-border);background:var(--v2-card);
  color:var(--v2-text-secondary);font-size:11.5px;font-weight:700;font-family:inherit;
}
.rc-exit:active{background:var(--v2-bg-alt)}
.rc-progress-text{font-size:11px;font-weight:700;color:var(--v2-text-tertiary)}
.rc-progress-text span:first-child{font-size:14px;font-weight:800;color:#0f766e}
.rc-mode{
  padding:4px 8px;border-radius:999px;
  background:rgba(20,184,166,.1);border:1px solid rgba(20,184,166,.18);
  color:#0f766e;font-size:9px;font-weight:800;letter-spacing:.4px;
}
.rc-progress{
  height:4px;border-radius:999px;overflow:hidden;
  background:var(--v2-bg-alt);margin-bottom:14px;
}
.rc-progress i{
  display:block;width:0;height:100%;border-radius:inherit;
  background:linear-gradient(90deg,#0d9488,#06b6d4);
  transition:width .28s ease-out;
}

.rc-card{
  position:relative;height:clamp(300px,56vh,430px);overflow:hidden;
  border-radius:24px;border:1px solid var(--v2-border-light);
  background:var(--v2-card);box-shadow:0 14px 36px rgba(15,23,42,.09);
  cursor:pointer;outline:none;-webkit-tap-highlight-color:transparent;
  transition:box-shadow .2s;
}
.rc-card:focus-visible{box-shadow:0 0 0 3px rgba(20,184,166,.24),0 14px 36px rgba(15,23,42,.09)}
.rc-card.rc-enter{animation:rcCardIn .24s ease-out}
@keyframes rcCardIn{from{opacity:0;transform:translateY(8px) scale(.992)}to{opacity:1;transform:none}}
.rc-faced{position:absolute;inset:0;display:flex;flex-direction:column;padding:18px}
.rc-faced[hidden]{display:none}

.rc-front{justify-content:center;align-items:center;text-align:center;gap:7px;padding:54px 20px 40px}
.rc-card-top{
  position:absolute;top:14px;left:16px;right:16px;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.rc-tag{
  padding:4px 8px;border-radius:999px;
  border:1px solid rgba(20,184,166,.15);background:rgba(20,184,166,.1);
  color:#0f766e;font-size:9px;font-weight:800;letter-spacing:.5px;
}
.rc-speak{
  height:28px;padding:0 10px;border-radius:9px;cursor:pointer;
  border:1px solid rgba(13,148,136,.22);background:var(--v2-card);
  color:#0f766e;font-size:10.5px;font-weight:700;font-family:inherit;
  transition:transform .12s;
}
.rc-speak:active{transform:scale(.94);background:rgba(20,184,166,.08)}
.rc-word{
  max-width:100%;font-size:40px;font-weight:800;letter-spacing:-1.2px;
  line-height:1.15;color:var(--v2-text);word-break:break-word;
}
.rc-phon{
  font-family:"Segoe UI",Arial,sans-serif;font-size:13px;font-weight:600;
  color:var(--v2-text-tertiary);word-break:break-word;
}
.rc-phon[hidden],.rc-back-title span[hidden]{display:none}
.rc-front-hint{margin-top:18px;font-size:10px;letter-spacing:.2px;color:var(--v2-text-tertiary)}

.rc-back{padding:16px 16px 12px}
.rc-back-head{
  display:flex;align-items:flex-start;justify-content:space-between;gap:10px;
  padding-bottom:10px;border-bottom:1px dashed var(--v2-border-light);
}
.rc-back-title{display:flex;align-items:baseline;gap:7px;flex-wrap:wrap;min-width:0}
.rc-back-title b{
  font-size:22px;font-weight:800;letter-spacing:-.4px;line-height:1.25;
  color:var(--v2-text);word-break:break-word;
}
.rc-back-title span{
  font-family:"Segoe UI",Arial,sans-serif;font-size:10.5px;font-weight:600;
  color:var(--v2-text-tertiary);word-break:break-word;
}
.rc-back-scroll{
  flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;
  padding:12px 2px 4px;-webkit-overflow-scrolling:touch;
}
.rc-primary-answer{
  font-size:21px;font-weight:800;line-height:1.5;color:#0f766e;word-break:break-word;
}
.rc-detail .de-section:first-child{margin-top:11px;padding-top:10px}
.rc-detail .de-section{margin-top:13px;padding-top:11px}
.rc-detail .de-section-title{font-size:11px;margin-bottom:7px}
.rc-detail .de-trans-item{font-size:12.5px}
.rc-detail .de-defs li{font-size:12px}
.rc-detail .de-ex-en{font-size:12.5px}
.rc-detail .de-ex-zh{font-size:11.5px}
.rc-detail .de-forms{gap:5px}
.rc-detail .de-form{font-size:10px;padding:3px 7px}
.rc-detail .de-empty{padding:16px 8px;font-size:11.5px}
.rc-detail-note{padding:12px 0 4px;font-size:11.5px;line-height:1.7;color:var(--v2-text-tertiary)}
.rc-dict-link{
  display:inline-flex;align-items:center;margin-top:12px;
  font-size:11px;font-weight:800;color:#0d9488;text-decoration:none;
}

.rc-actions{margin-top:14px}
.rc-show{
  width:100%;height:48px;border:0;border-radius:14px;cursor:pointer;
  background:linear-gradient(135deg,#0d9488,#06b6d4);color:#fff;
  font-size:14.5px;font-weight:800;font-family:inherit;
  box-shadow:0 8px 20px rgba(13,148,136,.2);transition:transform .12s;
}
.rc-show:active{transform:scale(.985)}
.rc-show[hidden],.rc-rate[hidden]{display:none}
.rc-rate{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.rc-rate-btn{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  height:54px;border-radius:14px;border:1px solid;cursor:pointer;
  font-family:inherit;transition:transform .12s;
}
.rc-rate-btn:active{transform:scale(.97)}
.rc-rate-btn span{font-size:14px;font-weight:800}
.rc-rate-btn em{font-size:9.5px;font-style:normal;font-weight:600;opacity:.72}
.rc-unknown{background:rgba(244,63,94,.06);border-color:rgba(244,63,94,.24);color:#be123c}
.rc-known{
  background:linear-gradient(135deg,#0d9488,#059669);border-color:transparent;
  color:#fff;box-shadow:0 8px 18px rgba(13,148,136,.2);
}
.rc-hint{margin-top:10px;text-align:center;font-size:9.5px;line-height:1.5;color:var(--v2-text-tertiary)}

/* ---------- 完成页 ---------- */
.rc-done{
  padding:30px 20px 22px;border-radius:24px;text-align:center;
  background:var(--v2-card);border:1px solid var(--v2-border-light);
  box-shadow:var(--v2-shadow-sm);
}
.rc-done-mark{
  width:64px;height:64px;margin:0 auto 12px;border-radius:50%;
  display:grid;place-items:center;font-size:28px;font-weight:800;color:#fff;
  background:linear-gradient(140deg,#0d9488,#06b6d4);
  box-shadow:0 10px 24px rgba(13,148,136,.24);
}
.rc-done h2{margin:0 0 6px;font-size:20px;font-weight:800;color:var(--v2-text)}
.rc-done-text{margin:0 0 18px;font-size:12px;line-height:1.7;color:var(--v2-text-secondary)}
.rc-done-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:14px}
.rc-done-stats div{
  padding:12px 4px;border-radius:14px;
  background:var(--v2-bg);border:1px solid var(--v2-border-light);
}
.rc-done-stats b{display:block;font-size:20px;font-weight:800;line-height:1.2;color:#0f766e}
.rc-done-stats span{display:block;margin-top:2px;font-size:9.5px;font-weight:600;color:var(--v2-text-tertiary)}
.rc-done-next{
  margin-bottom:16px;padding:11px;border-radius:12px;
  background:rgba(20,184,166,.07);font-size:11px;color:var(--v2-text-secondary);
}
.rc-done-next b{font-weight:800;color:#0f766e}
.rc-done .rc-primary{margin-bottom:9px}
.rc-ghost{
  width:100%;height:44px;border-radius:13px;cursor:pointer;
  border:1px solid var(--v2-border);background:var(--v2-card);
  color:var(--v2-text-secondary);font-size:13px;font-weight:700;font-family:inherit;
  text-decoration:none;display:flex;align-items:center;justify-content:center;
}
.rc-ghost:active{background:var(--v2-bg-alt)}
.rc-text-link{display:inline-block;margin-top:13px;font-size:11px;font-weight:700;color:var(--v2-text-tertiary);text-decoration:none}

/* ---------- 空状态 ---------- */
.rc-empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:44px 20px;border-radius:22px;text-align:center;
  background:var(--v2-card);border:1px dashed var(--v2-border);
}
.rc-empty-mark{
  width:62px;height:62px;margin-bottom:12px;border-radius:20px;
  display:grid;place-items:center;font-size:25px;font-weight:800;color:#fff;
  background:linear-gradient(140deg,#0d9488,#06b6d4);
  box-shadow:0 8px 20px rgba(13,148,136,.2);
}
.rc-empty-title{font-size:15px;font-weight:800;color:var(--v2-text-secondary)}
.rc-empty p{margin:7px 0 16px;max-width:280px;font-size:11.5px;line-height:1.7;color:var(--v2-text-tertiary)}
.rc-empty-actions{display:flex;gap:8px;width:100%;max-width:340px}
.rc-empty-actions .rc-primary,.rc-empty-actions .rc-ghost{height:42px;font-size:12.5px}
.rc-inline-btn{flex:1}

/* ---------- 深色模式 ---------- */
@media (prefers-color-scheme:dark){
  .rc-stat b,.rc-primary-answer,.rc-done-stats b,.rc-next,
  .rc-plan-head span,.rc-mode,.rc-tag,.rc-speak,.rc-dict-link,.rc-done-next b{color:#5eead4}
  .rc-plan-head span{background:rgba(20,184,166,.14)}
  .rc-tag{background:rgba(20,184,166,.14);border-color:#1d4d52}
  .rc-speak{background:#12303a;border-color:#1d4d52}
  .rc-exit,.rc-ghost{background:#111c2e}
  .rc-unknown{background:rgba(244,63,94,.12);border-color:rgba(244,63,94,.3);color:#fda4af}
  .rc-done-next{background:rgba(20,184,166,.1)}
  .rc-ring::before{background:#0b6d64}
  .rc-today-dot{box-shadow:0 0 0 3px rgba(20,184,166,.16)}
}

/* ---------- 窄屏 ---------- */
@media (max-width:380px){
  .rc-hero{padding:16px 13px 13px;border-radius:21px}
  .rc-due b{font-size:44px}
  .rc-due span{font-size:10.5px}
  .rc-ring{flex-basis:66px;width:66px;height:66px}
  .rc-ring::before{inset:6px}
  .rc-ring span{font-size:11px}
  .rc-card{height:clamp(290px,54vh,400px);border-radius:21px}
  .rc-word{font-size:34px}
  .rc-front{padding:50px 16px 36px}
  .rc-back-title b{font-size:19px}
  .rc-primary-answer{font-size:18px}
  .rc-done{padding:24px 14px 18px;border-radius:21px}
  .rc-done h2{font-size:18px}
}
@media (max-width:340px){
  .rc-hero-main{gap:8px}
  .rc-due b{font-size:40px}
  .rc-plan-track span{font-size:8px}
  .rc-word{font-size:30px}
  .rc-faced{padding:15px}
  .rc-rate-btn span{font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  .rc-card.rc-enter{animation:none}
  .rc-progress i{transition:none}
}