/* ============================================================
   英语单词时钟 · 样式
   时钟 / 轮播 / 动效 / 词库 四视图 + 背景幻灯片 + 电源模式
   ============================================================ */

/* ---------- 内置可变字体（Inter，拉丁字母/数字；中文字体走系统） ---------- */
@font-face{
  font-family:"InterVariable";
  src:url("../assets/fonts/InterVariable.woff2") format("woff2-variations");
  font-weight:100 900;
  font-style:normal;
  font-display:swap;
}

/* ---------- 主题变量 ---------- */
:root{
  --bg:#0E1620; --bg2:#1E2E40; --card:#14222E; --card2:#1B2C3A;
  --text:#EDF3F2; --text-soft:#9FB3C0; --text-faint:#5F7380;
  --accent:#86C5A0; --accent-soft:rgba(134,197,160,.14);
  --border:rgba(255,255,255,.09); --danger:#E07A6A; --danger-soft:rgba(224,122,106,.14);
  --shadow:rgba(0,0,0,.35); --track:rgba(255,255,255,.10);
  --radius:18px; --radius-lg:26px;
  --font:"InterVariable","Inter",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --view-pad:26px;
}
html[data-theme="graphite"]{
  --bg:#131315; --bg2:#232329; --card:#1B1B20; --card2:#26262B;
  --text:#EDEDEE; --text-soft:#A6A6AE; --text-faint:#5E5E66;
  --accent:#9A9AA8; --accent-soft:rgba(154,154,168,.14);
  --border:rgba(255,255,255,.08);
}
html[data-theme="dusk"]{
  --bg:#1C1610; --bg2:#3A2C1B; --card:#2A2118; --card2:#3A2F22;
  --text:#F0E6D8; --text-soft:#B3A48C; --text-faint:#6B5D49;
  --accent:#E0AC6A; --accent-soft:rgba(224,172,106,.15);
  --border:rgba(255,255,255,.09);
}
html[data-theme="matcha"]{
  --bg:#E9F0E3; --bg2:#D3E2C6; --card:#F4F8EF; --card2:#E6EFDC;
  --text:#2C3A2C; --text-soft:#5F7560; --text-faint:#8FA28E;
  --accent:#6A9A5B; --accent-soft:rgba(106,154,91,.15);
  --border:rgba(30,50,30,.10); --shadow:rgba(60,90,50,.12);
  --track:rgba(30,50,30,.10);
}
html[data-theme="mist"]{
  --bg:#EDF3F2; --bg2:#CFE0DD; --card:#F5FAF8; --card2:#E2EEEA;
  --text:#243A38; --text-soft:#58736F; --text-faint:#8CA3A0;
  --accent:#4E8A7C; --accent-soft:rgba(78,138,124,.14);
  --border:rgba(20,60,55,.10); --shadow:rgba(40,80,70,.12);
  --track:rgba(20,60,55,.10);
}
html[data-theme="paper"]{
  --bg:#F5F2EA; --bg2:#E3DBC9; --card:#FBF8F1; --card2:#ECE6D7;
  --text:#3B3A33; --text-soft:#7A6F5B; --text-faint:#A69B83;
  --accent:#A97B4F; --accent-soft:rgba(169,123,79,.14);
  --border:rgba(80,65,40,.11); --shadow:rgba(90,70,40,.12);
  --track:rgba(80,65,40,.10);
}
html[data-theme="lavender"]{
  --bg:#F0EEF4; --bg2:#DCD7E8; --card:#F7F5FA; --card2:#E6E1F0;
  --text:#312E3D; --text-soft:#6E6880; --text-faint:#9B94AD;
  --accent:#7B6FB0; --accent-soft:rgba(123,111,176,.14);
  --border:rgba(50,40,80,.10); --shadow:rgba(60,50,90,.12);
  --track:rgba(50,40,80,.10);
}
html[data-theme="jade"]{
  --bg:#101815; --bg2:#1B2A23; --card:#15201B; --card2:#1D2E26;
  --text:#E7EEE7; --text-soft:#9FB3A5; --text-faint:#5F7568;
  --accent:#9CC5A1; --accent-soft:rgba(156,197,161,.14);
  --border:rgba(255,255,255,.09);
}
html[data-theme="gold"]{
  --bg:#14120E; --bg2:#262117; --card:#1B1813; --card2:#262119;
  --text:#F0E9DC; --text-soft:#B3A68E; --text-faint:#6B6049;
  --accent:#C9A15C; --accent-soft:rgba(201,161,92,.15);
  --border:rgba(255,255,255,.10);
}
html[data-theme="violet"]{
  --bg:#141220; --bg2:#241F38; --card:#1C182A; --card2:#272140;
  --text:#EDEAF6; --text-soft:#ACA7C6; --text-faint:#6C6690;
  --accent:#A99BD6; --accent-soft:rgba(169,155,214,.15);
  --border:rgba(255,255,255,.10);
}
html[data-theme="teal"]{
  --bg:#0F1A1C; --bg2:#1B2E31; --card:#152326; --card2:#1E3034;
  --text:#E6F0F0; --text-soft:#9DB6B8; --text-faint:#5E7779;
  --accent:#7FC8C0; --accent-soft:rgba(127,200,192,.14);
  --border:rgba(255,255,255,.09);
}
html[data-theme="rose"]{
  --bg:#F6F1F0; --bg2:#E7DCD9; --card:#FBF7F6; --card2:#EEE4E1;
  --text:#463A38; --text-soft:#7E6B67; --text-faint:#A89792;
  --accent:#B98A84; --accent-soft:rgba(185,138,132,.14);
  --border:rgba(80,40,35,.10); --shadow:rgba(90,50,45,.12);
  --track:rgba(80,40,35,.10);
}
html[data-theme="ivory"]{
  --bg:#FAF7F1; --bg2:#ECE6D8; --card:#FFFDF8; --card2:#F2EDDF;
  --text:#3D382C; --text-soft:#7C7159; --text-faint:#A69B82;
  --accent:#8A7A5C; --accent-soft:rgba(138,122,92,.14);
  --border:rgba(90,70,40,.10); --shadow:rgba(90,70,40,.12);
  --track:rgba(90,70,40,.10);
}
html[data-theme="candy"]{
  --bg:#FFF3F5; --bg2:#FFE0E9; --card:#FFF9FA; --card2:#FFEDF1;
  --text:#5A3B4A; --text-soft:#9A6F80; --text-faint:#C09AA8;
  --accent:#E58FB0; --accent-soft:rgba(229,143,176,.16);
  --border:rgba(150,80,110,.12); --shadow:rgba(200,120,150,.16);
  --track:rgba(150,80,110,.10);
}
html[data-theme="cute"]{
  --bg:#FDF3E7; --bg2:#FFE4D6; --card:#FFFBF5; --card2:#FBEBDD;
  --text:#5A4A3F; --text-soft:#8A7463; --text-faint:#BFA995;
  --accent:#F08C9B; --accent-soft:rgba(240,140,155,.16);
  --border:rgba(120,90,70,.13); --shadow:rgba(140,90,60,.14);
  --track:rgba(120,90,70,.10);
}
html[data-theme="cute"] #decorLayer::before,
html[data-theme="cute"] #decorLayer::after{
  content:"";position:absolute;font-size:30px;line-height:1;
  opacity:.42;pointer-events:none;white-space:nowrap;
}
html[data-theme="cute"] #decorLayer::before{
  content:"☁️ 🌷 ⭐";top:6%;left:4%;letter-spacing:16px;
  animation:cuteFloat 9s ease-in-out infinite alternate;
}
html[data-theme="cute"] #decorLayer::after{
  content:"🐰 🍓 🌸";bottom:6%;right:4%;letter-spacing:14px;
  animation:cuteFloat 11s ease-in-out infinite alternate-reverse;
}
@keyframes cuteFloat{from{transform:translateY(0) rotate(-2deg)}to{transform:translateY(-10px) rotate(3deg)}}
@media (prefers-color-scheme: light){
  html[data-theme="auto"]{
    --bg:#F5F2EA; --bg2:#E3DBC9; --card:#FBF8F1; --card2:#ECE6D7;
    --text:#3B3A33; --text-soft:#7A6F5B; --text-faint:#A69B83;
    --accent:#A97B4F; --accent-soft:rgba(169,123,79,.14);
    --border:rgba(80,65,40,.11); --shadow:rgba(90,70,40,.12);
    --track:rgba(80,65,40,.10);
  }
}
html[data-theme="auto"]{
  --bg:#0E1620; --bg2:#1E2E40; --card:#14222E; --card2:#1B2C3A;
  --text:#EDF3F2; --text-soft:#9FB3C0; --text-faint:#5F7380;
  --accent:#86C5A0; --accent-soft:rgba(134,197,160,.14);
  --border:rgba(255,255,255,.09); --track:rgba(255,255,255,.10);
}

/* 自定义配色覆盖 */
html[data-custom="1"]{
  --bg:var(--c-bg); --bg2:var(--c-bg2); --card:var(--c-card); --card2:var(--c-card2);
  --text:var(--c-text); --text-soft:var(--c-text-soft); --text-faint:var(--c-faint);
  --accent:var(--c-acc); --accent-soft:var(--c-accsoft); --border:var(--c-border);
  --shadow:var(--c-shadow);
}

/* ---------- 字体 ---------- */
body[data-font="serif"]{ --font:"Source Han Serif SC","Noto Serif SC","Songti SC","SimSun",serif; }
body[data-font="mono"]{ --font:"SF Mono","Cascadia Code","Consolas",monospace,"PingFang SC"; }
body[data-font="round"]{ --font:"Yuanti SC","YouYuan","Microsoft YaHei",round,sans-serif; }
body[data-font="heiti"]{ --font:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif; }

/* ---------- 基础 ---------- */
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
html{overflow:hidden;overscroll-behavior:none}
body{
  font-family:var(--font);
  touch-action:manipulation;
  background:var(--bg); color:var(--text);
  height:100vh; height:100dvh; overflow:hidden;
  display:flex; flex-direction:column;
  transition:background .45s ease,color .45s ease;
  user-select:none; -webkit-user-select:none;
}
button{font-family:inherit;border:none;background:none;color:inherit;cursor:pointer}
input,textarea{font-family:inherit}
::selection{background:var(--accent-soft)}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:9px}
::-webkit-scrollbar-track{background:transparent}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

/* ---------- 背景层 ---------- */
#bgLayer{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
#decorLayer{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
body[data-power="ultra"] #decorLayer{display:none}
#bgPalette{position:absolute;inset:0;
  background:radial-gradient(130vw 90vh at 82% -12%,var(--bg2),transparent 62%),
             radial-gradient(110vw 80vh at -8% 118%,var(--bg2),transparent 60%),
             var(--bg);
  transition:background .6s ease;
}
html[data-custom="1"] #bgPalette{
  background:radial-gradient(130vw 90vh at 82% -12%,var(--c-bg2),transparent 62%),
             radial-gradient(110vw 80vh at -8% 118%,var(--c-bg2),transparent 60%),
             var(--c-bg);
}
#bgSlides{position:absolute;inset:0}
#bgSlides img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity var(--fx-speed,1.4s) ease}
#bgSlides img.on{opacity:1}
#bgSlides img.ken{animation:kenburns var(--kb-dur,20s) ease-in-out infinite alternate}
@keyframes kenburns{0%{transform:scale(1) translate(0,0)}100%{transform:scale(calc(1 + var(--kb-scale,.22))) translate(-1.6%,1.2%)}}
#bgSlides img.slidein{transform:translateX(100%)}
#bgSlides img.slidein.on{transform:translateX(0);transition:transform var(--fx-speed,1.1s) cubic-bezier(.3,.7,.25,1)}
#bgSlides img.slideout{transform:translateX(-100%);transition:transform var(--fx-speed,1.1s) cubic-bezier(.3,.7,.25,1);opacity:1}
body[data-bgblur="1"] #bgSlides img{filter:blur(var(--bgblur,0px)) saturate(1.05);transform:scale(1.12)}
#bgShade{position:absolute;inset:0;background:rgba(0,0,0,var(--mask,0));transition:background .5s ease}
body[data-power="ultra"] #bgSlides{display:none}
body[data-power="ultra"] #bgPalette{background:#000}
body[data-power="ultra"] #bgShade{background:rgba(0,0,0,.55)}

/* ---------- 顶栏 ---------- */
.topbar{
  position:relative;z-index:40;height:calc(60px + env(safe-area-inset-top));
  padding-top:env(safe-area-inset-top);flex:none;
  display:flex;align-items:center;gap:18px;padding:env(safe-area-inset-top) 22px 0;
  padding:env(safe-area-inset-top) max(22px, env(safe-area-inset-right)) 0 max(22px, env(safe-area-inset-left));
  background:linear-gradient(180deg,rgba(0,0,0,.18),transparent);
  transition:opacity .5s ease,transform .5s ease;
}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand-dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
.brand h1{font-size:15px;font-weight:700;letter-spacing:.03em;white-space:nowrap}
.brand small{font-size:9px;letter-spacing:.2em;color:var(--text-faint);display:block;margin-top:1px}
.mode-tabs{display:flex;gap:4px;margin:0 auto;padding:4px;border-radius:999px;background:var(--card);border:1px solid var(--border);box-shadow:0 4px 18px var(--shadow)}
.mode-tabs button{
  padding:7px 18px;border-radius:999px;font-size:13px;font-weight:600;
  color:var(--text-soft);transition:all .25s;white-space:nowrap;
}
.mode-tabs button.active{background:var(--accent);color:var(--bg)}
.top-actions{display:flex;align-items:center;gap:14px}
.stats{display:flex;gap:12px;font-size:11px;color:var(--text-faint)}
.st-item{text-align:center;min-width:38px}
.st-item b{display:block;font-size:16px;font-weight:800;color:var(--text);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.st-item span{font-size:10px;letter-spacing:.05em}
.st-click{cursor:pointer;padding:6px 10px;border-radius:10px;transition:background .2s}
.st-click:hover{background:var(--card)}
/* 顶部三数字语义色：已掌握绿 / 错词本红 / 本单元中性 */
.st-item.st-done b{color:var(--accent)}
.st-item.st-wrong b{color:var(--danger)}
.st-item.st-unit b{color:var(--text)}

/* 词库三本分段 */
.lib-seg{display:flex;gap:6px;width:min(880px,100%);margin:0 auto 8px;padding:4px;
  background:var(--card);border:1px solid var(--border);border-radius:999px}
.lib-seg button{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;
  padding:8px 10px;border-radius:999px;font-size:13px;font-weight:600;
  color:var(--text-soft);white-space:nowrap;transition:background .2s,color .2s}
.lib-seg button.active{background:var(--accent-soft);color:var(--accent);font-weight:700}
.lib-seg b{font-size:11px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1}
.lib-seg [data-lib="wrong"] b{color:var(--danger)}
.lib-seg [data-lib="unit"] b{color:var(--text-soft)}
.lib-seg [data-lib="mastered"] b{color:var(--accent)}
.unit-bar{width:min(880px,100%);margin:-4px auto 10px;display:flex;justify-content:center}
.unit-chip{display:flex;align-items:center;gap:8px;padding:9px 16px;border-radius:999px;
  background:var(--card);border:1px solid var(--border);color:var(--text-soft);
  font-size:13px;font-weight:600;transition:border-color .2s,color .2s}
.unit-chip i{font-style:normal;color:var(--text-soft);font-size:15px;line-height:1;margin-top:1px}
.unit-chip:hover{border-color:var(--accent);color:var(--accent)}
.sort-row{display:flex;gap:8px;flex-wrap:wrap}
.sort-chip{padding:5px 13px;border-radius:999px;font-size:12px;font-weight:600;
  color:var(--text-faint);background:var(--bg);border:1px solid var(--border);transition:all .2s}
.sort-chip.active{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.sort-chip:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- 通用按钮 ---------- */
.icon-btn{
  width:44px;height:44px;border-radius:13px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--card);border:1px solid var(--border);color:var(--text-soft);
  transition:all .2s;box-shadow:0 3px 12px var(--shadow);
}
.icon-btn svg{width:19px;height:19px}
.icon-btn:hover{color:var(--accent);transform:translateY(-1px);border-color:var(--accent)}
.mini-btn{
  width:38px;height:38px;border-radius:11px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--card);border:1px solid var(--border);color:var(--text-soft);
  transition:all .2s;
}
.mini-btn svg{width:16px;height:16px}
.mini-btn:hover{color:var(--accent);border-color:var(--accent)}
.mini-btn.speaking{color:var(--accent);border-color:var(--accent);animation:pulse 1s ease infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 var(--accent-soft)}50%{box-shadow:0 0 0 6px transparent}}

/* ---------- 视图通用 ---------- */
.view{flex:1;position:relative;z-index:1;display:none;overflow:hidden}
.view.active{display:flex;flex-direction:column}

/* ---------- 无操作自动隐藏 ---------- */
.hidable{opacity:1;pointer-events:auto;transition:opacity .55s ease,transform .55s ease}
body[data-ui="idle"] .hidable{opacity:0!important;pointer-events:none!important}
body[data-ui="idle"] .topbar{transform:translateY(-14px)}

/* ============================================================
   时钟模式
   ============================================================ */
#viewClock{justify-content:center}
.clock-layout{width:100%;height:100%;display:grid;place-items:center;padding:var(--view-pad)}
.clock-layout{padding:max(var(--view-pad), env(safe-area-inset-top)) max(var(--view-pad), env(safe-area-inset-right)) max(var(--view-pad), env(safe-area-inset-bottom)) max(var(--view-pad), env(safe-area-inset-left))}
.clock-main{
  width:min(1180px,100%);display:grid;gap:clamp(18px,4vh,44px);
  align-items:center;justify-items:center;
  grid-template-columns:1fr;grid-template-rows:auto auto;
  grid-template-areas:"clock" "todo" "card";
}
@media (orientation:landscape) and (min-width:700px){
  .clock-main{grid-template-columns:1.15fr .85fr;grid-template-rows:1fr auto;grid-template-areas:"clock card" "todo todo"}
}
.clock-face{grid-area:clock}
.clock-todo{grid-area:todo}
.clock-word{grid-area:card}
.clock-face{position:relative;text-align:center;width:100%;min-height:0}
.clock-face{cursor:pointer}
.clock-face:active .clock-digits{opacity:.72}
.clock-digits{
  font-size:clamp(4rem,15vw,10.5rem);font-weight:200;line-height:1;
  letter-spacing:.04em;font-variant-numeric:tabular-nums;
  text-shadow:0 10px 40px var(--shadow);
  white-space:nowrap;
}
.clock-secs{
  font-size:clamp(1.2rem,3.2vw,2.2rem);font-weight:300;color:var(--text-faint);
  font-variant-numeric:tabular-nums;margin-top:8px;letter-spacing:.2em;
}
.clock-date{
  margin-top:14px;font-size:clamp(.9rem,2vw,1.15rem);color:var(--text-soft);
  letter-spacing:.5em;font-weight:500;
}

/* 时钟样式：点阵（七段数码管） */
#clockFace[data-style="dotmatrix"] .clock-digits{
  display:flex;gap:.14em;justify-content:center;align-items:flex-end;
  font-size:clamp(3rem,11vw,8rem);font-weight:400;
}
.seg-digit{position:relative;width:.62em;height:1em;flex:none}
.seg-digit i{
  position:absolute;background:var(--text-faint);opacity:.14;transition:background .25s;
}
.seg-digit i.on{background:var(--accent);opacity:1;box-shadow:0 0 14px var(--accent)}
.seg-digit .s-a{left:12%;right:12%;top:0;height:8%;border-radius:999px}
.seg-digit .s-b{right:0;top:8%;width:8%;height:38%;border-radius:999px}
.seg-digit .s-c{right:0;bottom:8%;width:8%;height:38%;border-radius:999px}
.seg-digit .s-d{left:12%;right:12%;bottom:0;height:8%;border-radius:999px}
.seg-digit .s-e{left:0;bottom:8%;width:8%;height:38%;border-radius:999px}
.seg-digit .s-f{left:0;top:8%;width:8%;height:38%;border-radius:999px}
.seg-digit .s-g{left:12%;right:12%;top:46%;height:8%;border-radius:999px}
#clockFace[data-style="dotmatrix"] .clock-secs{font-size:clamp(.9rem,2.4vw,1.4rem);letter-spacing:.3em}

/* 时钟样式：翻页 */
#clockFace[data-style="flip"] .clock-digits{
  perspective:900px;display:inline-block;transform-style:preserve-3d;
}
#clockFace[data-style="flip"] .clock-digits.flipping{animation:flipTick .6s cubic-bezier(.3,.8,.3,1)}
@keyframes flipTick{
  0%{transform:rotateX(0)}
  45%{transform:rotateX(-92deg);filter:blur(2px)}
  100%{transform:rotateX(0);filter:blur(0)}
}

/* 时钟样式：霓虹 */
#clockFace[data-style="neon"] .clock-digits{
  color:var(--accent);font-weight:400;
  text-shadow:0 0 8px var(--accent),0 0 26px var(--accent),0 0 60px var(--accent-soft);
}
#clockFace[data-style="neon"] .clock-date{color:var(--text-soft)}

/* 时钟样式：描边镂空 */
#clockFace[data-style="outline"] .clock-digits{
  color:transparent;font-weight:800;
  -webkit-text-stroke:2px var(--text);
  text-shadow:0 6px 30px var(--shadow);
}
@media (max-width:480px){ #clockFace[data-style="outline"] .clock-digits{-webkit-text-stroke:1.5px var(--text)} }

/* 时钟样式：包豪斯（几何粗体，形式服从功能） */
#clockFace[data-style="bauhaus"] .clock-digits{
  font-weight:900;letter-spacing:.02em;font-stretch:condensed;
}
#clockFace[data-style="bauhaus"] .clock-secs{color:var(--accent);letter-spacing:.1em}
/* 时钟样式：瑞士排版（细字重 + 宽字距 + 上下细线） */
#clockFace[data-style="swiss"] .clock-digits{
  font-weight:300;letter-spacing:.16em;color:var(--text-soft);
  padding:.18em .1em;border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
#clockFace[data-style="swiss"] .clock-date{letter-spacing:.7em;color:var(--text-faint)}
/* 时钟样式：复古液晶（70 年代 LCD 面板质感） */
#clockFace[data-style="retrolcd"] .clock-digits{
  font-family:"SF Mono","Cascadia Code","Consolas",monospace;font-weight:600;
  letter-spacing:.1em;color:var(--accent);
  background:var(--card);border:1px solid var(--border);border-radius:20px;
  padding:.22em .5em;display:inline-block;
  box-shadow:inset 0 6px 22px var(--shadow),0 0 0 1px var(--bg);
}
#clockFace[data-style="retrolcd"] .clock-secs{color:var(--text-faint)}
/* 时钟样式：立体数字（多层投影堆叠出厚度） */
#clockFace[data-style="depth"] .clock-digits{
  font-weight:800;letter-spacing:.04em;
  text-shadow:
    0 1px 0 var(--accent-soft),
    0 2px 0 color-mix(in srgb,var(--accent-soft) 80%,transparent),
    0 3px 0 color-mix(in srgb,var(--accent-soft) 60%,transparent),
    0 5px 0 color-mix(in srgb,var(--accent-soft) 40%,transparent),
    0 10px 24px var(--shadow);
}
/* 时钟样式：终端光标（等宽字体 + 闪烁光标） */
#clockFace[data-style="terminal"] .clock-digits{
  font-family:"SF Mono","Cascadia Code","Consolas",monospace;font-weight:500;
  letter-spacing:.06em;color:var(--accent);
}
#clockFace[data-style="terminal"] .clock-digits::after{
  content:"▊";margin-left:.12em;font-size:.42em;vertical-align:middle;
  color:var(--accent);animation:blink 1.1s steps(2) infinite;
}
#clockFace[data-style="terminal"] .clock-secs{color:var(--text-faint)}

/* 时钟模式 · 单词卡 */
.clock-word{
  width:100%;max-width:620px;text-align:center;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:clamp(20px,4vh,34px) clamp(20px,4vw,38px);
  box-shadow:0 24px 70px var(--shadow);backdrop-filter:blur(14px);
}
.word-row{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap}
.cw-word{font-size:clamp(1.9rem,5.2vw,3.4rem);font-weight:800;letter-spacing:.02em}
.cw-ph{margin-top:8px;font-size:clamp(.85rem,2.2vw,1.1rem);color:var(--text-faint);letter-spacing:.04em}
.cw-mean{margin-top:clamp(10px,2.4vh,16px);font-size:clamp(1.15rem,3vw,1.7rem);font-weight:600;color:var(--accent);line-height:1.45}
.cw-ex{margin-top:14px;font-size:clamp(.95rem,2.4vw,1.15rem);color:var(--text-soft);line-height:1.7}
.cw-ex .ex-tr{display:block;margin-top:6px;font-size:.85em;color:var(--text-faint)}
.cw-ex .spk{display:inline-flex;vertical-align:middle;margin-left:8px}
.rv-ex .spk,.m-ex .spk{display:inline-flex;vertical-align:middle;margin-left:8px}
mark{background:var(--accent-soft);color:var(--accent);font-weight:700;padding:0 .18em;border-radius:.3em}

/* ============================================================
   复习模式（沉浸自测）
   ============================================================ */
#viewCarousel{align-items:center;justify-content:center;padding:var(--view-pad) 20px 24px}
#viewCarousel{padding:var(--view-pad) max(20px, env(safe-area-inset-right)) 24px max(20px, env(safe-area-inset-left))}
/* 复习专注模式：无背景图片 / 渐变，纯主题色 */
body[data-review="1"] #bgSlides,
body[data-review="1"] #bgPalette,
body[data-review="1"] #bgShade{display:none}
body[data-review="1"]{background:var(--bg)}
body[data-review="1"] .review-card{box-shadow:none}
.rv-top{position:absolute;top:14px;right:14px;z-index:20;display:flex;gap:8px}
.rv-top{right:max(14px, env(safe-area-inset-right))}
.rv-mini{
  padding:7px 14px;border-radius:999px;font-size:12px;font-weight:600;color:var(--text-faint);
  background:var(--card);border:1px solid var(--border);transition:all .2s;white-space:nowrap;
}
.rv-mini:hover{color:var(--accent);border-color:var(--accent)}
/* 复习方式选择 */
.rv-pick{
  position:absolute;inset:0;z-index:30;display:none;align-items:center;justify-content:center;
  background:color-mix(in srgb,var(--bg) 72%,transparent);backdrop-filter:blur(10px);
  padding:20px;
}
.rv-pick.show{display:flex}
.rv-pick-box{
  width:min(420px,100%);background:var(--card);border:1px solid var(--border);border-radius:22px;
  padding:26px 22px;text-align:center;box-shadow:0 24px 70px var(--shadow);
}
.rv-scope-label{margin:-6px 0 10px;font-size:12px;color:var(--text-faint)}
.rv-daily{margin:-6px 0 14px;font-size:12px;font-weight:700;color:var(--text-faint);letter-spacing:.04em;font-variant-numeric:tabular-nums}
.rv-daily.done{color:var(--accent)}
.rv-pick-box .rv-scope{justify-content:center;margin-bottom:16px}
.rv-pick-box h3{font-size:15px;font-weight:700;margin-bottom:18px;letter-spacing:.03em}
.rp-opt{
  display:flex;flex-direction:column;gap:5px;width:100%;margin-bottom:12px;
  padding:16px 18px;border-radius:16px;text-align:left;
  background:var(--bg);border:1px solid var(--border);transition:all .2s;
}
.rp-opt:last-child{margin-bottom:0}
.rp-opt b{font-size:14.5px;font-weight:800}
.rp-opt span{font-size:11.5px;color:var(--text-faint)}
.rp-opt:hover{border-color:var(--accent);transform:translateY(-1px)}
.rp-opt:active{transform:scale(.98)}
.review-card{
  width:min(680px,100%);background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:clamp(26px,6vh,52px) clamp(20px,5vw,48px);text-align:center;
  box-shadow:0 30px 80px var(--shadow);
}
/* 答题音画反馈：正确淡亮 / 错误淡红微闪 */
@keyframes cardOkGlow{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 40%,transparent)}100%{box-shadow:0 0 0 26px transparent}}
.review-card.fx-ok{animation:cardOkGlow .6s ease}
@keyframes cardNoGlow{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--danger) 36%,transparent)}100%{box-shadow:0 0 0 20px transparent}}
.review-card.fx-no{animation:cardNoGlow .6s ease}
body[data-power="ultra"] .review-card.fx-ok,
body[data-power="ultra"] .review-card.fx-no{animation:none}
.rv-word-row{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}
.rv-word{font-size:clamp(2.6rem,9vw,6rem);font-weight:800;line-height:1.1;word-break:break-word}
.rv-ph{margin-top:10px;font-size:clamp(.9rem,2.4vw,1.2rem);color:var(--text-faint);letter-spacing:.04em}
.rv-mean{margin-top:clamp(16px,4vh,30px);font-size:clamp(1.5rem,5vw,2.8rem);font-weight:600;color:var(--accent);line-height:1.45;word-break:break-word}
.rv-ex{margin-top:16px;font-size:clamp(1rem,2.8vw,1.4rem);color:var(--text-soft);line-height:1.75;word-break:break-word}
.rv-ex .ex-tr{display:block;margin-top:8px;font-size:.84em;color:var(--text-faint)}
.rv-mean.reveal-wait,.rv-ex.reveal-wait{opacity:0;transform:translateY(8px)}
.rv-mean.reveal-show,.rv-ex.reveal-show{opacity:1;transform:none;transition:opacity .6s ease,transform .6s ease}
.rv-hint{display:none;margin-top:14px;font-size:clamp(1.4rem,4.5vw,2.4rem);font-weight:800;
  letter-spacing:.28em;color:var(--text-soft);font-variant-numeric:tabular-nums;text-align:center}
.rv-hint.show{display:block}
.rv-input-box{display:none;margin-top:26px;justify-content:center;gap:10px}
.rv-input-box.show{display:flex}
.rv-input-box input{
  width:min(300px,64%);background:var(--bg);border:1px solid var(--border);border-radius:14px;
  padding:13px 16px;color:var(--text);font-size:16px;outline:none;text-align:center;transition:border .2s;
}
.rv-input-box input:focus{border-color:var(--accent)}
.rv-check{
  flex:none;padding:0 22px;border-radius:14px;font-size:14px;font-weight:700;
  background:var(--accent);color:var(--bg);
}
.rv-feedback{margin-top:16px;min-height:26px;font-size:15px;font-weight:700;color:var(--text-soft)}
.rv-feedback.ok{color:var(--accent)}
.rv-feedback.no{color:var(--danger)}
.rv-feedback .ans{color:var(--accent);font-weight:800}
.rv-manual{display:none;gap:10px;justify-content:center;margin-top:22px;flex-wrap:wrap}
.rv-manual.show{display:flex}
.rv-manual button{min-width:120px}
.rv-manual #btnRvWrong:disabled{opacity:.55;cursor:default}
.rv-secs{min-height:18px;font-size:12px;color:var(--text-faint);text-align:center;margin-top:20px;font-variant-numeric:tabular-nums}
.rv-progress{width:min(420px,64vw);height:3px;border-radius:3px;background:var(--track);margin:6px auto 8px;overflow:hidden;opacity:.8}
.rv-progress i{
  display:block;height:100%;width:0;border-radius:3px;
  background:color-mix(in srgb,var(--accent) 55%,transparent);
}
.rv-counter{text-align:center;font-size:12px;color:var(--text-faint);font-variant-numeric:tabular-nums;letter-spacing:.08em}
.rv-counter b{color:var(--accent);font-weight:800;font-size:14.5px;margin:0 1px}
body[data-power="ultra"] .rv-counter b{color:#999}
.review-acts{display:none;gap:12px;justify-content:center;margin-top:24px;flex-wrap:wrap}
.rv-done{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:30;width:min(680px,100%);
  display:none;flex-direction:column;align-items:center;gap:18px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:36px 26px;box-shadow:0 30px 80px var(--shadow)}
.rv-done.show{display:flex}
.rv-done h3{font-size:16px;font-weight:700;letter-spacing:.03em}
.rv-sum-stats{display:flex;gap:40px}
.rv-sum-stats div{text-align:center}
.rv-sum-stats b{display:block;font-size:36px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums}
.rv-sum-stats span{font-size:11px;color:var(--text-faint)}
.rv-sum-wrong{width:100%;display:flex;flex-direction:column;gap:8px;max-height:220px;overflow:auto}
.sum-wrong{display:flex;justify-content:space-between;gap:12px;padding:10px 12px;
  border:1px solid var(--border);border-radius:var(--radius);font-size:13px}
.sum-wrong b{color:var(--danger)}
.sum-wrong span{color:var(--text-soft)}
.sum-none{font-size:13px;color:var(--accent)}
.rv-sum-acts{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.review-acts.show{display:flex}
.review-acts button{
  min-width:120px;padding:12px 22px;border-radius:999px;font-size:14px;font-weight:700;transition:all .2s;
}
.review-acts .r-know{background:var(--accent);color:var(--bg);box-shadow:0 8px 24px var(--shadow)}
.review-acts .r-know:hover{transform:translateY(-2px)}
.review-acts .r-forget{background:var(--bg);color:var(--text-soft);border:1px solid var(--border)}
.review-acts .r-forget:hover{color:var(--danger);border-color:var(--danger)}

/* 时钟角标：今日待复习 */
.clock-todo{
  margin-top:16px;font-size:12px;letter-spacing:.03em;color:var(--text-faint);
  text-align:center;cursor:pointer;user-select:none;display:none;
}
.clock-todo:hover{color:var(--accent)}
.clock-todo .pt-lb{font-size:11px;letter-spacing:.14em;color:var(--text-faint);font-weight:500}
.clock-todo .pt-num{
  font-size:16px;font-weight:800;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:.02em;margin:0 5px 0 4px;
}
.clock-todo .pt-sep{font-style:normal;font-size:11px;color:var(--text-faint);opacity:.45}
body[data-power="ultra"] .clock-todo .pt-num{color:#999}

/* ============================================================
   动效模式
   ============================================================ */
#viewMotion{align-items:center;justify-content:center;padding:var(--view-pad) 20px 30px}
#viewMotion{padding:var(--view-pad) max(20px, env(safe-area-inset-right)) 30px max(20px, env(safe-area-inset-left))}
.motion-stage{position:relative;width:100%;max-width:760px;flex:1;display:flex;align-items:center;justify-content:center;perspective:1400px}
.motion-card{
  position:relative;width:min(92%,620px);min-height:min(50vh,440px);
  background:linear-gradient(160deg,var(--card),var(--bg));
  border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:clamp(20px,5vh,42px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:clamp(8px,2vh,16px);
  text-align:center;box-shadow:0 30px 80px var(--shadow);
}
.motion-clock{
  position:absolute;top:22px;right:26px;font-size:13px;letter-spacing:.14em;color:var(--text-faint);
  font-variant-numeric:tabular-nums;z-index:5;
}
.m-word{font-size:clamp(2.4rem,8vw,5.4rem);font-weight:800;line-height:1.1;word-break:break-word;max-width:100%}
.m-word{display:inline-block}
.m-ph{font-size:clamp(.85rem,2vw,1.05rem);color:var(--text-faint)}
.m-mean{font-size:clamp(1.3rem,4.4vw,2.3rem);font-weight:600;color:var(--accent);line-height:1.4;word-break:break-word;max-width:100%}
.m-ex{font-size:clamp(.95rem,2.6vw,1.25rem);color:var(--text-soft);line-height:1.7;word-break:break-word;max-width:100%}
.m-ex .ex-tr{display:block;margin-top:6px;font-size:.85em;color:var(--text-faint)}
.m-spk{display:inline-flex;margin-left:6px;vertical-align:middle}

/* 动效风格 */
body[data-mfx="typewriter"] .m-word .tw-caret{display:inline-block;width:2px;background:var(--accent);animation:blink 0.9s steps(2) infinite}
@keyframes blink{50%{opacity:0}}
body[data-mfx="orbit"] .motion-card{animation:orbitIn .9s cubic-bezier(.2,.85,.25,1) both}
@keyframes orbitIn{from{opacity:0;transform:rotateY(-40deg) translateX(-40px) scale(.92)}to{opacity:1;transform:none}}
body[data-mfx="float"] .motion-card{animation:floatIn .8s ease both}
@keyframes floatIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
body[data-mfx="float"] #motionStage::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(circle at 30% 60%,var(--accent-soft),transparent 45%),
             radial-gradient(circle at 70% 40%,var(--accent-soft),transparent 40%);
  opacity:.5;animation:breathe 7s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:.3}50%{opacity:.7}}
body[data-mfx="page"] .motion-card{animation:pageIn .85s cubic-bezier(.3,.7,.3,1) both;transform-origin:left center}
@keyframes pageIn{from{opacity:0;transform:rotateY(-75deg)}to{opacity:1;transform:rotateY(0)}}
body[data-mfx="zoom"] .motion-card{animation:zoomIn .7s cubic-bezier(.2,.85,.25,1) both}
@keyframes zoomIn{from{opacity:0;transform:scale(.86)}to{opacity:1;transform:scale(1)}}
body[data-mfx="gradient"] .motion-card{border:none;background:linear-gradient(160deg,var(--card),var(--accent-soft))}
body[data-mfx="gradient"] .m-word{color:var(--accent);animation:gradPulse 6s ease-in-out infinite}
@keyframes gradPulse{0%,100%{color:var(--accent)}50%{color:var(--text)}}

/* 全局界面毛玻璃 */
body[data-glass="1"] .clock-word,
body[data-glass="1"] .motion-card,
body[data-glass="1"] .review-card,
body[data-glass="1"] .topbar,
body[data-glass="1"] .modal,
body[data-glass="1"] .sheet,
body[data-glass="1"] .word-card,
body[data-glass="1"] .list-toolbar,
body[data-glass="1"] .search-box,
body[data-glass="1"] .mode-tabs{
  background:color-mix(in srgb,var(--card) var(--glass-op,70%),transparent);
  backdrop-filter:blur(var(--glass-blur,18px)) saturate(1.4);
  -webkit-backdrop-filter:blur(var(--glass-blur,18px)) saturate(1.4);
}

.ring-card{position:relative}
/* 单词卡边框倒计时（动效模式） */
.card-frame{
  position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:3;
  padding:2px;
  background:conic-gradient(color-mix(in srgb,var(--accent) 40%,transparent) var(--fp,0%),transparent 0);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  transition:background .2s linear;
}
body[data-power="ultra"] .card-frame{display:none}

/* 时钟 / 动效界面：极致省电快捷键 */
.power-quick{
  position:absolute;top:14px;right:14px;z-index:25;
  right:max(14px, env(safe-area-inset-right));
  padding:7px 14px;border-radius:999px;font-size:12px;font-weight:600;color:var(--text-faint);
  background:var(--card);border:1px solid var(--border);transition:all .2s;white-space:nowrap;
}
.power-quick:hover{color:var(--accent);border-color:var(--accent)}
body[data-power="ultra"] .power-quick{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.m-share{position:absolute;top:14px;right:14px;z-index:10;width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;background:var(--card);border:1px solid var(--border);
  color:var(--text-soft);box-shadow:0 6px 18px var(--shadow);transition:all .2s}
.m-share svg{width:17px;height:17px}
.m-share:hover{color:var(--accent);border-color:var(--accent);transform:translateY(-1px)}
body[data-power="ultra"] .m-share{display:none}

/* ============================================================
   词库模式
   ============================================================ */
#viewLibrary{overflow-y:auto;padding:18px 20px 110px}
#viewLibrary{padding:18px max(20px, env(safe-area-inset-right)) 110px max(20px, env(safe-area-inset-left))}
.list-toolbar{position:sticky;top:0;z-index:10;display:flex;flex-direction:column;gap:12px;margin-bottom:14px;
  padding:14px 16px;border-radius:var(--radius);background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:blur(16px);border:1px solid var(--border);box-shadow:0 8px 26px var(--shadow)}
.search-row{display:flex;gap:8px;align-items:stretch}
.search-box{flex:1;display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:0 14px}
.search-box input{flex:1;background:none;border:none;outline:none;color:var(--text);font-size:14.5px;padding:11px 0}
.search-box input::placeholder{color:var(--text-faint)}
.search-btn{flex:none;display:flex;align-items:center;padding:0 18px;border-radius:13px;
  font-size:13px;font-weight:700;background:var(--accent);color:var(--bg);transition:filter .2s}
.search-btn:hover{filter:brightness(1.08)}
.sort-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:-2px 2px 12px}
.sort-label{font-size:11px;font-weight:600;letter-spacing:.1em;color:var(--text-faint)}
.word-list{display:flex;flex-direction:column;gap:10px;max-width:880px;margin:0 auto}
.word-card{
  display:flex;align-items:center;gap:14px;padding:14px 16px;border-radius:var(--radius);
  background:var(--card);border:1px solid var(--border);box-shadow:0 4px 16px var(--shadow);
  transition:all .2s;animation:itemIn .35s ease both;
}
@keyframes itemIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.word-card:hover{border-color:var(--accent);transform:translateY(-1px)}
.word-card.done{opacity:.55}
/* 词库模式：纯管理界面，无动效 */
body[data-mode="library"] .word-card{animation:none;transition:none;transform:none}
body[data-mode="library"] .word-card:hover{transform:none;border-color:var(--border);background:var(--card)}
body[data-mode="library"] .list-toolbar{backdrop-filter:none;background:color-mix(in srgb,var(--bg) 96%,transparent)}
body[data-mode="library"] .search-box{transition:none}
.wc-main{flex:1;min-width:0}
.wc-line1{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.wc-meta{display:flex;gap:6px;flex-wrap:wrap;margin-top:5px}
.wc-badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:999px;
  font-size:10.5px;font-weight:700;letter-spacing:.02em;line-height:1.4}
.wc-badge.err{background:var(--danger-soft);color:var(--danger)}
.wc-badge.mem{background:var(--accent-soft);color:var(--accent)}
.wc-badge.src{background:var(--card2);color:var(--text-faint)}
.wc-word{font-size:19px;font-weight:800;letter-spacing:.01em}
.wc-ph{font-size:12px;color:var(--text-faint)}
.wc-mean{font-size:14px;color:var(--text-soft);margin-top:3px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}
.wc-ex{font-size:12.5px;color:var(--text-faint);margin-top:3px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}
.wc-acts{display:flex;gap:8px;flex:none;flex-wrap:wrap;justify-content:flex-end}
.wc-acts .mini-btn{width:36px;height:36px}
.wc-master.on{color:var(--accent);border-color:var(--accent)}
.empty-state{padding:16vh 20px;text-align:center;color:var(--text-faint);font-size:15px;line-height:2}
.fab{
  position:fixed;right:22px;bottom:calc(26px + env(safe-area-inset-bottom));z-index:50;width:56px;height:56px;border-radius:18px;
  right:max(22px, env(safe-area-inset-right));
  background:var(--accent);color:var(--bg);display:grid;place-items:center;
  box-shadow:0 12px 34px var(--shadow);transition:all .25s;
}
.fab svg{width:24px;height:24px}
.fab:hover{transform:translateY(-3px) scale(1.04)}

@media (max-width:760px){
  .brand h1{display:none}
  .mode-tabs{margin:0 auto;padding:3px;gap:2px}
  .mode-tabs button{padding:6px 12px;font-size:12px}
  .stats{display:none}
  .brand small{display:none}
  .topbar{padding:0 14px}
  .topbar{padding:env(safe-area-inset-top) max(14px, env(safe-area-inset-right)) 0 max(14px, env(safe-area-inset-left))}
  .view{padding-bottom:8px}
  #viewLibrary{padding-bottom:30px}
  #viewCarousel{padding:var(--view-pad) 14px 20px}
  #viewCarousel{padding:var(--view-pad) max(14px, env(safe-area-inset-right)) 20px max(14px, env(safe-area-inset-left))}
  #viewClock{padding:0}
  .clock-main{padding-bottom:8px}
  .motion-stage{padding-bottom:8px}
}

/* ============================================================
   弹窗与抽屉
   ============================================================ */
.overlay{position:fixed;inset:0;z-index:80;background:rgba(0,0,0,.55);backdrop-filter:blur(4px);
  display:none;align-items:center;justify-content:center;padding:18px}
.overlay{padding:max(18px, env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left))}
.overlay.show{display:flex;animation:fadeIn .25s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{
  width:100%;max-width:520px;max-height:92vh;max-height:min(92dvh, calc(100dvh - env(safe-area-inset-top) - env(safe-area-inset-bottom)));overflow-y:auto;border-radius:22px;
  background:var(--card);border:1px solid var(--border);padding:22px;box-shadow:0 30px 90px var(--shadow);
  animation:up .32s cubic-bezier(.2,.8,.3,1);
}
@keyframes up{from{opacity:0;transform:translateY(34px) scale(.98)}to{opacity:1;transform:none}}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.modal-head h2{font-size:17px;font-weight:700}
.field{margin-bottom:14px}
.field label{display:flex;align-items:center;justify-content:space-between;font-size:12px;font-weight:700;color:var(--text-soft);margin-bottom:7px}
.field input[type=text],.field textarea{
  width:100%;background:var(--bg);border:1px solid var(--border);border-radius:13px;
  padding:11px 13px;color:var(--text);font-size:14.5px;outline:none;transition:border .2s;resize:vertical;
}
.field input:focus,.field textarea:focus{border-color:var(--accent)}
.word-input-wrap{display:flex;gap:8px}
.word-input-wrap input{flex:1}
.lookup-btn{
  flex:none;padding:0 16px;border-radius:13px;font-size:13.5px;font-weight:700;
  background:var(--accent);color:var(--bg);transition:filter .2s;
}
.lookup-btn:disabled{opacity:.55;cursor:wait}
.lookup-status{min-height:22px;font-size:12px;color:var(--text-faint);margin:-6px 0 10px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.lookup-status .src{color:var(--accent);font-weight:700}
.ex-row{display:grid;grid-template-columns:1fr 1fr 30px;gap:8px;margin-bottom:8px}
.ex-row input{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:11px;padding:9px 11px;color:var(--text);font-size:13px;outline:none}
.ex-row input:focus{border-color:var(--accent)}
.ex-row .rm{width:30px;height:34px;border-radius:10px;color:var(--danger);background:var(--danger-soft);display:grid;place-items:center}
.modal-actions{display:flex;gap:10px;margin-top:20px}
.modal-actions .btn{flex:1;padding:12px;border-radius:13px;font-size:14px;font-weight:700;transition:filter .2s}
.btn.ghost{background:var(--bg);color:var(--text-soft);border:1px solid var(--border)}
.btn.primary{background:var(--accent);color:var(--bg)}
.btn.danger{background:var(--danger-soft);color:var(--danger);border:1px solid transparent}
.dt-ph{margin-top:-6px;font-size:13.5px;color:var(--text-faint);letter-spacing:.04em}
.dt-mean{margin-top:12px;font-size:16.5px;font-weight:600;color:var(--accent);line-height:1.6}
.dt-exs{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.dt-ex{background:var(--bg);border:1px solid var(--border);border-radius:13px;padding:12px 14px;font-size:14px;color:var(--text-soft);line-height:1.7}
.dt-ex .zh{display:block;margin-top:5px;font-size:12.5px;color:var(--text-faint)}
.dt-meta{margin-top:16px;font-size:11.5px;color:var(--text-faint);display:flex;gap:14px;flex-wrap:wrap}

/* 教材词库抽屉（树状：教材 → 单元） */
.tree-empty{padding:34px 16px;text-align:center;color:var(--text-faint);font-size:13px;line-height:2}
.tree-empty button{margin-top:8px;padding:9px 20px;border-radius:999px;background:var(--accent);color:var(--bg);font-size:13px;font-weight:700}
.tree-all-wrap{margin-bottom:10px}
.tree-all{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;
  padding:13px 14px;border-radius:var(--radius);background:var(--accent-soft);border:1px solid var(--accent);
  color:var(--accent);font-size:13.5px;font-weight:800;transition:all .2s}
.tree-all small{font-size:11px;font-weight:500;opacity:.85}
.tree-all i{font-style:normal;font-size:15px;line-height:1}
.tree-all:hover{border-color:var(--accent);transform:translateY(-1px)}
.aw-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.aw-back{flex:none;padding:7px 12px;border-radius:999px;font-size:12px;font-weight:600;
  background:var(--bg);border:1px solid var(--border);color:var(--text-soft)}
.aw-back:hover{color:var(--accent);border-color:var(--accent)}
.aw-title{font-size:14px;font-weight:800}
.aw-chips{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.aw-chip{padding:6px 12px;border-radius:999px;font-size:12px;font-weight:600;
  color:var(--text-faint);background:var(--bg);border:1px solid var(--border);transition:all .2s}
.aw-chip.active{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.aw-row{padding:10px 2px;border-bottom:1px dashed var(--border);cursor:pointer}
.aw-row:hover .aw-word{color:var(--accent)}
.aw-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.aw-word{font-size:14px;font-weight:700;transition:color .2s}
.aw-badges{display:flex;gap:5px;flex-wrap:wrap;justify-content:flex-end}
.aw-mean{font-size:12px;color:var(--text-faint);margin-top:3px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tree-book{margin-bottom:10px;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--bg)}
.tree-book-head{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;
  padding:13px 14px;text-align:left;font-size:13.5px}
.tree-book-head b{font-weight:700;color:var(--text)}
.tree-book-head small{font-size:11px;color:var(--text-faint);font-weight:500;margin-left:8px}
.tree-book-head i{font-style:normal;font-size:13px;color:var(--text-faint);transition:transform .25s}
.tree-book.open .tree-book-head i{transform:rotate(180deg)}
.tree-units{display:none}
.tree-book.open .tree-units{display:block}
.tree-unit{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 14px;border-top:1px solid var(--border);cursor:pointer}
.tree-unit:hover{background:var(--card)}
.tree-unit .tu-info{display:flex;flex-direction:column;gap:2px;min-width:0}
.tree-unit .tu-name{font-size:13px;font-weight:600;color:var(--text-soft)}
.tree-unit .tu-count{font-size:11px;color:var(--text-faint)}
.tree-unit .tu-set{flex:none;padding:6px 13px;border-radius:999px;font-size:12px;font-weight:700;
  background:var(--bg);border:1px solid var(--border);color:var(--text-soft)}
.tree-unit .tu-set:hover{border-color:var(--accent);color:var(--accent)}
.tree-words{display:none;padding:4px 14px 12px;border-top:1px dashed var(--border)}
.tree-unit.open .tree-words{display:block}
.tree-words .tw-row{display:flex;justify-content:space-between;gap:12px;padding:8px 2px;
  border-bottom:1px solid var(--border);cursor:pointer}
.tree-words .tw-row:last-child{border-bottom:none}
.tree-words .tw-word{font-size:13.5px;font-weight:700;color:var(--text)}
.tree-words .tw-mean{font-size:12px;color:var(--text-faint);text-align:right;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:58%}

/* 设置抽屉 */
.sheet{
  position:fixed;top:0;right:0;bottom:0;z-index:85;width:min(440px,100%);
  background:var(--card);border-left:1px solid var(--border);box-shadow:-20px 0 60px var(--shadow);
  transform:translateX(102%);transition:transform .38s cubic-bezier(.3,.7,.25,1);
  display:flex;flex-direction:column;overflow:hidden;
}
.sheet.open{transform:none}
.sheet-head{flex:none;display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--border)}
.sheet-head{flex:none;display:flex;align-items:center;justify-content:space-between;padding:max(18px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-left));border-bottom:1px solid var(--border)}
.sheet-head h2{font-size:17px;font-weight:700}
.sheet-body{flex:1;overflow-y:auto;padding:0 20px 40px}
.sheet-body{flex:1;overflow-y:auto;padding:0 max(20px, env(safe-area-inset-right)) max(40px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left))}
.sheet-sec{padding:18px 0;border-bottom:1px solid var(--border)}
.sheet-sec:last-child{border-bottom:none}
.sheet-sec summary{
  font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--text-faint);
  margin-bottom:14px;cursor:pointer;list-style:none;user-select:none;
  display:flex;align-items:center;justify-content:space-between;
}
.sheet-sec summary::-webkit-details-marker{display:none}
.sheet-sec summary::after{content:"▾";font-size:10px;opacity:.7;transition:transform .25s}
.sheet-sec:not([open]) summary::after{transform:rotate(-90deg)}
.sheet-sec:not([open]) summary{margin-bottom:0}
.sheet-group-title{font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--text-faint);
  padding:16px 0 8px;display:flex;align-items:center;gap:10px}
.sheet-group-title::after{content:"";flex:1;height:1px;background:var(--border)}
.sect-label{display:block;font-size:12px;font-weight:600;color:var(--text-soft);margin:14px 0 8px}
.sect-label b{color:var(--accent);float:right}
.power-desc{
  font-size:11.5px;color:var(--text-soft);line-height:1.8;margin-top:10px;
  padding:11px 13px;border-radius:13px;background:var(--bg);border:1px solid var(--border);
}
.opt-chips{display:flex;gap:8px;flex-wrap:wrap}
.opt-chips .ochip{
  padding:8px 14px;border-radius:999px;font-size:12.5px;font-weight:600;color:var(--text-soft);
  background:var(--bg);border:1px solid var(--border);transition:all .2s;
}
.opt-chips .ochip.active{background:var(--accent);color:var(--bg);border-color:transparent}
.book-list{display:flex;flex-direction:column;gap:8px;margin-bottom:6px}
.book-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;
  border:1px solid var(--border);border-radius:var(--radius);background:var(--bg)}
.book-info{display:flex;flex-direction:column;gap:3px;min-width:0}
.book-info b{font-size:13px}
.book-info span{font-size:11px;color:var(--text-faint)}
.book-acts{display:flex;gap:6px;flex:none}
.book-acts .mini-btn.up{color:var(--accent)}
.pack-catalog{display:flex;flex-direction:column;gap:8px;margin-bottom:6px}
.pack-btn{display:flex;flex-direction:column;gap:3px;text-align:left;padding:12px 14px;
  border:1px dashed var(--border);border-radius:var(--radius);background:transparent;
  color:var(--text);cursor:pointer;transition:all .2s}
.pack-btn b{color:var(--accent)}
.pack-btn span{font-size:11px;color:var(--text-faint)}
.pack-btn:hover{border-color:var(--accent);background:var(--accent-soft)}
.next-lesson{margin-top:12px}
.empty-tip{margin:4px 0}
.streak-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}
.streak-info{display:flex;flex-direction:column;gap:2px}
.streak-info span{font-size:14px;font-weight:600}
.streak-info b{font-size:11.5px;color:var(--text-faint);font-weight:600}
.rv-sum-streak{font-size:12px;color:var(--text-faint)}
.switch-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:11px 0}
.switch-row .txt{font-size:14px;font-weight:600}
.switch-row .sub{font-size:11.5px;color:var(--text-faint);margin-top:2px}
.switch{
  width:46px;height:27px;border-radius:999px;background:var(--track);position:relative;flex:none;
  transition:background .25s;
}
.switch::after{
  content:"";position:absolute;top:3px;left:3px;width:21px;height:21px;border-radius:50%;
  background:var(--text-soft);transition:all .25s;
}
.switch.on{background:var(--accent)}
.switch.on::after{left:22px;background:var(--bg)}
.range-row{display:flex;align-items:center;gap:12px;margin:12px 0}
.range-row input[type=range]{flex:1;accent-color:var(--accent)}
.range-row input[type=time]{background:var(--bg);border:1px solid var(--border);border-radius:10px;color:var(--text);padding:7px 10px;font-size:13px;outline:none}
.range-row span{color:var(--text-faint);font-size:12px}
.rate-head{display:flex;justify-content:space-between;font-size:12px;color:var(--text-soft);margin-bottom:6px;flex:1}
.rate-head b{color:var(--accent)}
.swatches{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.swatch{
  border-radius:13px;padding:9px 4px 7px;border:2px solid var(--border);text-align:center;transition:all .2s;
}
.swatch .dot{width:26px;height:26px;border-radius:9px;margin:0 auto 6px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.08)}
.swatch .nm{font-size:10.5px;color:var(--text-soft);white-space:nowrap}
.swatch.active{border-color:var(--accent);transform:translateY(-2px)}
.custom-colors{display:flex;gap:10px;flex-wrap:wrap}
.custom-colors label{flex:1;min-width:90px;display:flex;flex-direction:column;align-items:center;gap:6px;font-size:11px;color:var(--text-soft)}
.custom-colors input[type=color]{width:100%;height:38px;border:1px solid var(--border);border-radius:10px;background:var(--bg);padding:3px;cursor:pointer}
.data-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.data-actions .btn{flex:1;min-width:120px;padding:10px;border-radius:12px;font-size:13px;font-weight:700}
.footnote{font-size:11.5px;color:var(--text-faint);margin-top:16px;line-height:1.7}
.sheet-body input[type=range]{
  width:100%;display:block;margin:2px 0 12px;accent-color:var(--accent);
}
.range-row input[type=range]{width:100%;margin:0}

/* 背景图片管理 */
.bg-hint{font-size:11px;color:var(--text-faint);margin-top:10px}
.sub-sec{margin-top:6px;border:1px solid var(--border);border-radius:var(--radius);padding:10px 12px;background:var(--bg)}
.sub-sec summary{font-size:12px;font-weight:600;color:var(--text-soft);cursor:pointer;list-style:none;
  display:flex;align-items:center;justify-content:space-between;user-select:none}
.sub-sec summary::-webkit-details-marker{display:none}
.sub-sec summary::after{content:"▾";font-size:10px;opacity:.7;transition:transform .25s}
.sub-sec:not([open]) summary::after{transform:rotate(-90deg)}
.sub-sec summary b{color:var(--accent)}
.sub-sec[open] .bg-grid{margin-top:10px}
.bg-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.bg-add{
  position:relative;aspect-ratio:1;border-radius:11px;border:1.5px dashed var(--border);
  background:var(--bg);color:var(--text-faint);display:grid;place-items:center;
  transition:all .2s;
}
.bg-add .plus-big{font-size:36px;font-weight:200;line-height:1;transform:translateY(-1px)}
.bg-add:hover{border-color:var(--accent);color:var(--accent)}
.bg-thumb{position:relative;aspect-ratio:1;border-radius:11px;overflow:hidden;border:2px solid var(--border)}
.bg-thumb.active{border-color:var(--accent)}
.bg-thumb-ph{position:absolute;inset:0;background:var(--bg)}
.bg-thumb-ph img{width:100%;height:100%;object-fit:cover}
.bg-thumb-ph.ph-wait{display:grid;place-items:center;color:var(--text-faint);font-size:16px}
.bg-thumb .del{
  position:absolute;top:4px;right:4px;width:22px;height:22px;border-radius:8px;
  background:rgba(0,0,0,.55);color:#fff;display:grid;place-items:center;font-size:12px;
}
.bg-thumb .mv{
  position:absolute;bottom:4px;left:4px;width:22px;height:22px;border-radius:8px;
  background:rgba(0,0,0,.55);color:#fff;display:grid;place-items:center;font-size:11px;
}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:calc(30px + env(safe-area-inset-bottom));transform:translate(-50%,24px);z-index:99;
  background:var(--text);color:var(--bg);padding:11px 20px;border-radius:999px;
  font-size:13px;font-weight:600;opacity:0;transition:all .3s;box-shadow:0 10px 30px var(--shadow);
  pointer-events:none;max-width:86vw;text-align:center;
}
.toast.show{opacity:.97;transform:translate(-50%,0)}

/* ============================================================
   电源模式
   ============================================================ */
body[data-power="eco"] #bgSlides img{animation:none}
body[data-power="eco"] #clockSecs,body[data-power="eco"] .motion-clock{display:none}
body[data-power="eco"] body[data-mfx="float"] #motionStage::after{animation:none}
body[data-power="eco"] .car-word,.motion-card{animation-duration:.01s}

body[data-power="ultra"]{
  color:#8a8a8a;
}
body[data-power="ultra"] *{animation:none!important;transition:none!important}
body[data-power="ultra"] #bgPalette{background:#000!important}
body[data-power="ultra"] #bgSlides{display:none!important}
body[data-power="ultra"] #clockSecs,body[data-power="ultra"] .motion-clock{display:none!important}
body[data-power="ultra"] .clock-face{filter:grayscale(1)}
body[data-power="ultra"] .cw-word,body[data-power="ultra"] .car-word,body[data-power="ultra"] .m-word{color:#b8b8b8}
body[data-power="ultra"] .cw-mean,body[data-power="ultra"] .car-mean,body[data-power="ultra"] .m-mean{color:#9a9a9a}
body[data-power="ultra"] .cw-ex,body[data-power="ultra"] .car-ex,body[data-power="ultra"] .m-ex{color:#777}
body[data-power="ultra"] .clock-word,body[data-power="ultra"] .motion-card,body[data-power="ultra"] .word-card{background:#000;border-color:#222}
body[data-power="ultra"] .clock-face.burn-shift{transform:translate(1px,1px)}
/* 极致省电：整体再调暗（黑场 + 内容降亮度，OLED 屏更省电护屏） */
body[data-power="ultra"]::after{
  content:"";position:fixed;inset:0;background:rgba(0,0,0,.5);
  pointer-events:none;z-index:9998;
}

/* ============================================================
   辅助与无障碍
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
@media (max-width:520px){
  :root{--view-pad:16px}
}
@media (max-height:520px) and (orientation:landscape){
  .clock-word{padding:10px 16px;border-radius:20px}
  .cw-word{font-size:1.5rem}
  .cw-ph{font-size:.75rem;margin-top:2px}
  .cw-mean{font-size:1rem;margin-top:6px}
  .cw-ex{font-size:.8rem;margin-top:8px;line-height:1.5}
  .cw-ex .ex-tr{margin-top:2px}
  .clock-date{margin-top:6px;font-size:.8rem}
  .clock-digits{font-size:clamp(3rem,12vw,6.5rem)}
}