:root{
  --bg:#ffffff; --nav:#fff8ea; --card:#ffffff; --text:#08254a; --muted:#3f4e66;
  --line:#e8edf4; --teal:#3c6694; --teal-dark:#3c6694; --blue:#2d8fe5;
  --red:#ff9d9d; --red-text:#d71943; --yellow:#ffe1a0; --yellow-text:#7c5312;
  --mint:#e4effd;
  /* 統一的圖示上色濾鏡：把原本純黑色的 svg 圖示，轉成跟文字一致的深灰藍／品牌藍 */
  --icon-tint:invert(26%) sepia(21%) saturate(389%) hue-rotate(178deg) brightness(130%) contrast(135%);
  --teal-icon-tint:invert(32%) sepia(22%) saturate(1200%) hue-rotate(178deg) brightness(90%) contrast(90%);
  --danger-icon-tint:invert(31%) sepia(46%) saturate(1221%) hue-rotate(311deg) brightness(95%) contrast(86%);
  --shadow:0 18px 42px rgba(40,64,108,.10); --radius:24px;
}
*{box-sizing:border-box}
/* 明確宣告網站只支援淺色主題（注意：一定要寫 only light，只寫 light 是沒有用的）。
   Android Chrome 有個「Auto Dark Theme」功能，會用演算法自動幫沒有明確關閉這個功能的網站做顏色調整
   （連 SVG 圖示的顏色也會被重新調整），這也是為什麼烏龜圖示、標題旁的綠色 icon 在手機上顏色會跑掉
   （甚至變黑）的真正原因——不是濾鏡精確度問題，是 Chrome 自動幫這些飽和度較高的顏色做了「深色化」調整。
   只有加上 only 這個關鍵字，才能真正關閉這個自動加工，讓圖示在哪裡看都會是同一個顏色。
   參考：https://developer.chrome.com/blog/auto-dark-theme */
html{color-scheme:only light}
body{margin:0;font-family:"Noto Sans TC",-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft JhengHei",sans-serif;color:var(--text);background:#ffffff;min-height:100vh}
/* 純英文文字：不套用中文字體與字重調整，維持原始系統字型外觀 */
.title h1,.title h2,.subtitle,.overall-title,.overall-good,.overall-title small,.metric-name small{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.metric-name small{font-weight:800}
.app{min-height:100vh}
.sidebar{position:fixed;top:0;left:0;bottom:0;width:150px;background:#ffffff;border-right:1px solid var(--line);padding:28px 14px;display:flex;flex-direction:column;align-items:center;gap:26px;overflow-y:auto;z-index:20}
.account-icon{width:78px;height:78px;border-radius:50%;background:#3c6694;display:grid;place-items:center;overflow:hidden;text-decoration:none}
.account-icon.is-auth-pending,.bottom-nav-account .bottom-nav-icon.is-auth-pending{visibility:hidden}
.account-icon img{width:52px;height:52px;filter:brightness(0) invert(1)}
.account-icon img.account-photo,.bottom-nav-account .bottom-nav-icon img.account-photo,.avatar img.account-photo{width:100%;height:100%;border-radius:50%;object-fit:cover;filter:none}
.account-icon-initial{color:white;font-size:32px;font-weight:900;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.bottom-nav{display:none;position:fixed;left:0;right:0;bottom:0;background:#ffffff;border-top:1px solid var(--line);padding:8px 4px calc(8px + env(safe-area-inset-bottom));z-index:20;box-shadow:0 -10px 24px rgba(8,37,74,.08)}
.bottom-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;flex:1 1 0;min-width:0;padding:8px 2px;color:var(--muted);text-decoration:none;font-size:11px;font-weight:400;border-radius:14px;-webkit-tap-highlight-color:transparent}
.bottom-nav a > span:last-child{line-height:1.2;text-align:center}
.bottom-nav-icon{width:26px;height:26px;display:grid;place-items:center;border-radius:10px;flex-shrink:0}
.bottom-nav-icon img{width:22px;height:22px;filter:var(--icon-tint)}
.bottom-nav a.active{background:#eef1f5}
/* 手機瀏覽器內建的點擊反饋（tap highlight）預設只會先貼著 icon 那個小方塊短暫閃一下，
   看起來像是「先閃小色塊、才長成整條區塊」，改成按下去立刻讓整條區塊變灰，體感更即時。 */
.bottom-nav a:active{background:#eef1f5}
.bottom-nav-account .bottom-nav-icon{width:38px;height:38px;border-radius:50%;background:#3c6694;overflow:hidden}
.bottom-nav-account .bottom-nav-icon img{width:22px;height:22px;filter:brightness(0) invert(1)}
.bottom-nav-account .bottom-nav-icon .account-icon-initial{font-size:16px}
.nav{display:flex;flex-direction:column;gap:18px;width:100%;margin-top:42px}
.nav a{display:flex;align-items:center;gap:10px;width:100%;padding:14px 10px;border-radius:16px;font-size:14px;font-weight:400;color:var(--muted);text-decoration:none;white-space:nowrap}
.nav a img{width:22px;height:22px;filter:var(--icon-tint)}
.nav a.active{background:#eef1f5}
.help-link{margin-top:auto;display:flex;align-items:center;gap:8px;width:116px;justify-content:center;padding:12px 10px;border:1px solid var(--line);border-radius:16px;color:var(--muted);font-weight:400;font-size:14px;background:white;text-decoration:none}
.help-link:hover,.help-link.active{background:#eef1f5}
.help-link img{width:18px;height:18px;filter:var(--icon-tint)}
main{margin-left:150px;padding:30px 38px 28px;max-width:1320px}
.header{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:26px}
.title{min-width:0;max-width:100%}
.site-logo{display:block;width:460px;max-width:100%;height:auto}
.title h1{margin:0;font-size:38px;letter-spacing:.2px;line-height:1.05;font-weight:900}
.title h2{margin:4px 0 8px;font-size:28px;line-height:1.1;color:var(--teal-dark);font-weight:900}
.subtitle{color:var(--muted);font-size:15px;font-weight:700}
.badge{margin-top:16px;padding:14px 22px;border-radius:999px;border:1px solid #eadfc7;color:var(--muted);background:rgba(255,253,246,.86);font-size:15px;font-weight:400;white-space:nowrap}
.grid{display:grid;grid-template-columns:1fr 1.18fr;gap:22px}
.card{background:#ffffff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.section-title{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:700;margin-bottom:24px}
.num{width:36px;height:36px;margin-left:4px;color:var(--teal-dark);display:grid;place-items:center;font-size:22px;font-weight:900}
.num img{width:32px;height:32px;position:relative;top:2px;filter:var(--teal-icon-tint)}
textarea{width:100%;height:178px;resize:none;border:1.8px solid rgba(60,102,148,.45);border-radius:22px;padding:22px;font-size:21px;line-height:1.65;letter-spacing:.2px;color:var(--text);outline:none;background:#fffefe;font-family:"SF Mono","Menlo","Consolas",monospace}
.counter{text-align:right;color:var(--muted);font-size:14px;font-weight:400;margin-top:-34px;margin-right:18px;position:relative;z-index:1}
.hint{margin:26px 0 22px;color:var(--muted);font-size:15px;font-weight:400}
.hint-icon{display:flex;align-items:center;gap:8px}.hint-icon img{width:16px;height:16px;filter:var(--icon-tint)}
.practice-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:22px}
.slow-toggle{display:inline-flex;flex-direction:row;min-height:auto;align-items:center;gap:7px;font-size:14px;color:var(--muted);font-weight:500;padding:8px 14px;border-radius:999px;border:1.5px solid var(--line);background:white;cursor:pointer;user-select:none;transition:background .15s,color .15s,border-color .15s}
.slow-toggle:hover{background:#f3f7f8;border-color:rgba(60,102,148,.45)}
/* 這個圖示改用 mask-image + background-color（跟旁邊「1.0」文字用同一個 --teal-dark 顏色變數），
   不用 filter 濾鏡去逼近顏色，這樣顏色是完全相同的色碼，不會因為瀏覽器／裝置對濾鏡的算法差異，
   而跟旁邊文字的顏色有些微色差。 */
.turtle-icon{display:inline-block;width:20px;height:20px;background-color:var(--teal-dark);-webkit-mask-image:url('../assets/icons/turtle.svg');mask-image:url('../assets/icons/turtle.svg');-webkit-mask-size:contain;mask-size:contain;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-position:center;mask-position:center;transition:background-color .15s}
.slow-toggle-rate{font-family:"SF Mono","Menlo","Consolas",monospace;font-weight:700;color:var(--teal-dark)}
.slow-toggle.active{background:#eef1f5;border-color:#eef1f5}
.folder-save-btn{width:40px;height:40px;min-height:auto;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;border:1.5px solid var(--line);background:white;cursor:pointer;transition:background .15s,border-color .15s}
.folder-save-btn:hover{background:#f3f7f8;border-color:rgba(60,102,148,.45)}
.folder-save-btn img{width:19px;height:19px;filter:var(--icon-tint);transition:filter .15s}
.folder-save-btn.active{background:#eef1f5;border-color:#eef1f5}
.folder-save-btn.active img{filter:var(--teal-icon-tint)}
.folder-popover{position:absolute;z-index:50;width:240px;background:white;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:14px}
.folder-popover-title{font-size:13px;font-weight:700;color:var(--muted);margin-bottom:10px}
.folder-popover-list{display:grid;gap:6px;max-height:180px;overflow-y:auto}
.folder-popover-item{display:flex;flex-direction:row;align-items:center;gap:8px;width:100%;text-align:left;background:white;border:1px solid var(--line);border-radius:10px;padding:9px 10px;font-size:14px;font-weight:400;color:var(--text);cursor:pointer;min-height:auto}
.folder-popover-item img{width:16px;height:16px;filter:var(--icon-tint);flex-shrink:0}
.folder-popover-item.active{background:var(--mint);border-color:var(--teal-dark)}
.folder-popover-new{display:flex;gap:6px;margin-top:10px}
.folder-popover-input{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:13px;color:var(--text)}
.folder-popover-add{border:0;border-radius:10px;padding:8px 12px;font-size:13px;font-weight:700;color:white;background:var(--teal-dark);cursor:pointer;min-height:auto}
.folder-popover-remove{width:100%;margin-top:10px;border:1px solid #f3d4d4;border-radius:10px;padding:8px 10px;font-size:13px;font-weight:700;color:#c23b3b;background:white;cursor:pointer;min-height:auto}
.volume-meter{display:flex;align-items:center;gap:10px;margin-top:18px;margin-bottom:4px}
.volume-label{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);white-space:nowrap}
.volume-label img{display:none}
.volume-bar{flex:1;height:8px;border-radius:999px;background:var(--mint);overflow:hidden}
.volume-fill{height:100%;width:0%;border-radius:999px;background:linear-gradient(90deg,var(--teal),#ffb020);transition:width .05s linear}
.button-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:26px;margin-bottom:14px}
.button-row > button{
  background:#ffffff;
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:0 4px 14px rgba(40,64,108,.06);
  color:var(--text);
  min-height:0;
  padding:8px 10px;
  gap:0;
  font-size:0;
  line-height:0;
  overflow:visible;
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.button-row > button img{
  width:100%;
  max-width:100%;
  height:auto;
  aspect-ratio:1 / 1;
  object-fit:contain;
  object-position:center;
  display:block;
  filter:none;
}
.button-row > button:hover:not(:disabled){
  transform:translateY(-3px);
  box-shadow:0 8px 20px rgba(40,64,108,.12);
  border-color:#b9cde5;
  background:#ffffff;
}
.button-row > button:active:not(:disabled){
  transform:translateY(-1px) scale(.98);
}
.button-row > button:disabled{
  opacity:.4;
  cursor:not-allowed;
  transform:none;
  box-shadow:0 4px 14px rgba(40,64,108,.06);
}
.button-row > button:disabled:hover{
  transform:none;
  box-shadow:0 4px 14px rgba(40,64,108,.06);
  border-color:var(--line);
}
button{border:0;min-height:82px;border-radius:18px;cursor:pointer;color:white;font-weight:700;font-size:17px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px}
button img{width:26px;height:26px}
button:disabled{opacity:.55;cursor:not-allowed}
.voice-row{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;width:100%;margin:0 0 18px}
.voice-row > button.voice-btn{
  -webkit-appearance:none;
  appearance:none;
  display:inline-flex;
  flex-direction:row;
  align-items:center;
  justify-content:center;
  width:100%;
  min-width:0;
  min-height:32px;
  height:32px;
  max-height:32px;
  padding:0 6px;
  margin:0;
  border-radius:10px;
  border:1px solid #63718a;
  background:#fff;
  color:#3f4e66;
  font-size:14px;
  font-weight:500;
  line-height:1;
  white-space:nowrap;
  gap:0;
  box-shadow:none;
  opacity:1;
  pointer-events:auto;
  cursor:pointer;
}
.voice-row > button.voice-btn:hover{
  background:#fff;
  color:#3f4e66;
}
.voice-row > button.voice-btn.selected{
  background:#fff;
  border-color:var(--teal-dark);
  color:var(--teal-dark);
}
/* 瀏覽器在系統深色模式下，會把 audio 播放條原生控制項也畫成深色，這裡強制維持淺色，不隨系統深色模式變暗 */
audio{color-scheme:only light}
.audio-player{display:flex;align-items:center;gap:10px;width:100%;background:#fbfcfd;border:1px solid var(--line);border-radius:999px;padding:8px 14px;margin-bottom:12px}
.audio-toggle{width:30px;height:30px;min-height:auto;flex-shrink:0;padding:0;border-radius:50%;border:0;background:var(--teal-dark);display:inline-flex;align-items:center;justify-content:center;cursor:pointer}
.audio-icon-play{width:0;height:0;border-style:solid;border-width:6px 0 6px 9px;border-color:transparent transparent transparent white;margin-left:2px}
.audio-toggle.playing .audio-icon-play{display:none}
.audio-icon-pause{display:none;width:9px;height:10px;border-left:3px solid white;border-right:3px solid white}
.audio-toggle.playing .audio-icon-pause{display:block}
.audio-time{font-size:12px;color:var(--muted);font-family:"SF Mono","Menlo","Consolas",monospace;flex-shrink:0;min-width:32px}
.audio-seek{flex:1;min-width:60px;height:6px;-webkit-appearance:none;appearance:none;background:#e8edf4;border-radius:999px;cursor:pointer;margin:0}
.audio-seek::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:var(--teal-dark);border:2px solid white;box-shadow:0 0 0 1px rgba(0,0,0,.08);cursor:pointer}
.audio-seek::-moz-range-track{height:6px;border-radius:999px;background:transparent}
.audio-seek::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--teal-dark);border:2px solid white;box-shadow:0 0 0 1px rgba(0,0,0,.08);cursor:pointer}
.notice{border-radius:16px;background:var(--mint);padding:18px 20px;font-size:15px;color:var(--text);font-weight:400;margin-bottom:20px}
a.download-link{display:none;margin-bottom:28px;margin-left:auto;text-decoration:none;width:fit-content}
.mini-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.mini{min-height:150px;border:1px solid var(--line);border-radius:18px;background:white;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;text-align:center;padding:16px}
.mini img{width:36px;height:36px;filter:var(--icon-tint)}
.mini img[src$="us-accent.svg"]{filter:none}
.mini strong{display:block;font-size:19px;font-weight:700;color:var(--text)}
.mini span{font-size:14px;color:var(--muted);font-weight:400}
.result-top{display:grid;grid-template-columns:190px 1fr 210px;gap:24px;align-items:center;margin-bottom:26px}
.score-ring{width:168px;height:168px;border-radius:50%;background:conic-gradient(#e3e9f0 0 100%);display:grid;place-items:center;position:relative;margin:auto}
.score-ring:before{content:"";width:126px;height:126px;border-radius:50%;background:white;position:absolute}
.score-inner{position:relative;text-align:center}.score-inner strong{display:block;font-size:52px;line-height:1;font-weight:900;color:var(--text)}.score-inner span{color:var(--muted);font-size:16px;font-weight:400}
.overall-title{font-size:16px;font-weight:900;color:var(--text);margin-bottom:8px}.overall-title small{font-size:13px;color:var(--muted);margin-left:4px;font-weight:800}.overall-good{font-size:30px;font-weight:900;color:var(--teal-dark);margin-bottom:10px}.overall-text{color:var(--muted);line-height:1.6;font-weight:400;font-size:15px}
.character-box{width:190px;height:205px;display:flex;align-items:center;justify-content:center;overflow:hidden;flex-shrink:0}.character-box img{width:100%;height:100%;max-width:100%;max-height:100%;object-fit:contain;object-position:center;display:block}.character-missing{width:190px;height:205px;border:2px dashed #d6d6d6;display:flex;align-items:center;justify-content:center;color:#aaa;font-size:13px;text-align:center}
.metrics{display:grid;gap:0}.metric{display:grid;grid-template-columns:48px 210px 1fr 76px;align-items:center;gap:14px;padding:10px 0;border-bottom:1px solid #eef1f4;font-weight:400;color:var(--text)}.metric:last-child{border-bottom:0}
.metric-icon{width:38px;height:38px;border-radius:50%;background:var(--mint);display:grid;place-items:center}.metric-icon img{width:21px;height:21px;filter:var(--icon-tint)}.metric-name small{font-size:13px;color:var(--muted);margin-left:4px}
.metric-sub{display:block;font-size:12px;color:var(--muted);font-weight:400;margin-top:4px;line-height:1.4}
.metric-disabled{opacity:.78}
.metric-note{grid-column:1 / -1;margin:0;padding:0 0 2px 62px;font-size:12px;line-height:1.55;color:var(--muted);font-weight:400}
.bar{height:8px;border-radius:999px;background:var(--mint);overflow:hidden}.bar span{display:block;height:100%;border-radius:999px;background:var(--teal);width:80%}.bar.orange span{background:#ffad53}.bar-idle span{width:0;background:#d8dee8}
.value{font-size:22px;font-weight:900;text-align:right;color:var(--text)}.value small{font-size:13px;font-weight:400;color:var(--muted)}.value-idle{font-size:13px;font-weight:500;color:var(--muted)}
.detail-analysis{margin-top:22px;padding-top:8px;border-top:1px solid #eef1f4}
.detail-title{font-size:16px;font-weight:700;color:var(--text);margin-bottom:12px}
.detail-groups{display:grid;gap:10px}
.detail-group{background:#fbfcfd;border:1px solid var(--line);border-radius:14px;padding:12px 14px}
.detail-group strong{display:block;font-size:13px;font-weight:700;color:var(--text);margin-bottom:6px}
.detail-group p{margin:0;font-size:14px;line-height:1.6;color:var(--muted);font-weight:400}
.detail-issue-list{display:grid;gap:10px}
.detail-issue-word{font-size:15px;font-weight:700;color:var(--text)}
.detail-issue-phonemes{margin:4px 0 0;font-size:14px;line-height:1.6;color:var(--muted);font-weight:400}
.detail-word-run{margin:0;font-size:15px;line-height:1.7;color:var(--text);font-weight:500}
.detail-empty{margin:0;font-size:14px;line-height:1.6;color:var(--muted);font-weight:400}
.word-tree{display:grid;gap:8px}
.word-tree:empty{display:none}
.word-item{border:1px solid var(--line);border-radius:14px;background:white;padding:10px 12px}
.word-item summary{cursor:pointer;font-weight:700;color:var(--text);list-style:none;display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;font-size:14px}
.word-item summary::-webkit-details-marker{display:none}
.word-item-meta{font-weight:500;color:var(--muted);font-size:13px}
.word-item ul{margin:8px 0 0;padding-left:18px;color:var(--muted);font-size:13px;line-height:1.6}
.word-item li{margin:2px 0}
.word-flag{color:#c23b3b;font-weight:700}
.feedback{margin-top:22px;padding:18px 22px;border-radius:16px;background:var(--mint);color:var(--teal-dark);font-weight:400;font-size:16px}
.page-card{max-width:820px}.form{display:grid;gap:14px}.input{width:100%;border:1px solid var(--line);border-radius:16px;padding:15px 16px;font-size:16px}
.primary-link,.primary-btn{background:var(--teal);color:white;border:0;border-radius:16px;padding:14px 18px;font-weight:700;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px}.google-btn{background:white;color:var(--muted);border:1px solid var(--line)}
.primary-link:hover,.primary-btn:hover:not(:disabled){background:#32567e}
.primary-link img,.primary-btn img{width:20px;height:20px;filter:brightness(0) invert(1)}
.download-link{background:#eef7ff;color:var(--text)}
.download-link:hover{background:#dbe9fb}
.download-link img{filter:var(--icon-tint)}
.history-list{display:grid;gap:14px}.history-item{position:relative;border:1px solid var(--line);border-radius:18px;padding:18px;background:white;display:grid;gap:10px}.history-actions{display:flex;flex-direction:row;align-items:center;gap:10px;flex-wrap:wrap}.small-btn{min-height:auto;border-radius:12px;padding:10px 12px;font-size:14px;background:#eef7ff;color:var(--text);display:inline-flex;flex-direction:row;flex-shrink:0}
.history-actions .audio-player{flex:1;min-width:160px;margin:0}
.history-item-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.history-score{flex-shrink:0;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:700;background:var(--mint);color:var(--teal-dark);white-space:nowrap}
.history-score-pending{background:#f1f3f6;color:var(--muted);font-weight:500}
.history-folder-btn{position:absolute;right:18px;top:48px;width:32px;height:32px;min-height:auto;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;border:1.5px solid var(--line);background:white;cursor:pointer}
.history-folder-btn:hover{background:#f3f7f8;border-color:rgba(60,102,148,.45)}
.history-folder-btn img{width:15px;height:15px;filter:var(--icon-tint);transition:filter .15s}
.history-folder-btn.active{background:#eef1f5;border-color:#eef1f5}
.history-folder-btn.active img{filter:var(--teal-icon-tint)}
.history-delete-btn{margin-left:auto;flex-shrink:0;width:34px;height:34px;min-height:auto;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;border:1.5px solid #f3d4d4;background:white;cursor:pointer}
.history-delete-btn:hover{background:#fce3e3}
.history-delete-btn img{width:16px;height:16px;filter:var(--danger-icon-tint)}
.small-btn:hover{background:#dbe9fb}
.btn-outline{background:white;color:var(--muted);border:1px solid var(--line)}
.btn-danger-outline{background:white;color:#c23b3b;border:1px solid #f3d4d4}
.small-btn.btn-outline:hover{background:#eef1f5}
.small-btn.btn-danger-outline:hover{background:#fce3e3}
.btn-compact{min-height:auto;padding:12px 28px}
.primary-btn.google-btn:hover:not(:disabled),.primary-btn.btn-outline:hover:not(:disabled){background:#eef1f5}
.primary-btn.btn-danger-outline:hover:not(:disabled){background:#fce3e3}
.profile-head{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.avatar{width:84px;height:84px;border-radius:50%;background:#3c6694;color:white;display:grid;place-items:center;font-size:34px;font-weight:900;flex-shrink:0;overflow:hidden}
.avatar .account-icon-initial{font-size:34px}
.profile-name-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.profile-name-row strong{font-size:24px;color:var(--text)}
.name-edit-btn{min-height:auto;border-radius:10px;padding:7px 14px;font-size:13px}
.profile-email{color:var(--muted);font-size:14px;margin-top:4px;font-weight:400}
.profile-rows{display:grid;gap:12px;margin-top:24px}
.profile-row{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-radius:16px;padding:14px 18px;background:white}
.profile-row>span:first-child{color:var(--muted);font-size:14px;font-weight:400}
.profile-row>span:last-child{font-weight:700;color:var(--text)}
.plan-badge{background:#eef7ff;color:var(--text);border-radius:999px;padding:5px 14px;font-size:13px;font-weight:700}
.plan-badge-loading{background:#eef1f5;color:var(--muted);font-weight:500}
.plan-badge-error{background:#fce3e3;color:#c23b3b}
.folder-create-row{display:flex;gap:10px;margin-top:16px;margin-bottom:18px}
.folder-create-row .input{flex:1}
.folder-list{display:grid;gap:14px}
.folder-card{border:1px solid var(--line);border-radius:18px;background:white;padding:16px 18px}
.folder-card summary{cursor:pointer;list-style:none}
.folder-card summary::-webkit-details-marker{display:none}
.folder-toggle-arrow{width:11px;height:11px;flex-shrink:0;border-right:2.5px solid var(--muted);border-bottom:2.5px solid var(--muted);transform:rotate(-45deg);transition:transform .2s ease;margin:0 2px 0 2px}
.folder-card[open] .folder-toggle-arrow{transform:rotate(45deg)}
.folder-card-header{display:inline-flex;align-items:center;gap:10px;flex-wrap:wrap;width:calc(100% - 20px);vertical-align:middle}
.folder-card-header img{width:18px;height:18px;filter:var(--icon-tint)}
.folder-card-header strong{font-size:16px;color:var(--text)}
.folder-count{font-size:13px;color:var(--muted);font-weight:400}
.folder-card-actions{display:flex;gap:8px;margin-left:auto}
.folder-rename-form{display:flex;gap:8px;flex:1;min-width:180px}
.folder-rename-form input{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;padding:7px 10px;font-size:14px}
.folder-sentences{display:grid;gap:10px;margin-top:14px}
.folder-sentence-row{border:1px solid #eef0f4;border-radius:14px;padding:14px 16px;display:grid;gap:10px;background:#fbfcfd}
.folder-sentence-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap}
.folder-sentence-text{color:var(--text);font-size:14px;font-weight:500;flex:1;min-width:160px}
.folder-sentence-date{color:var(--muted);font-size:13px;flex-shrink:0}
.folder-sentence-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.folder-sentence-actions .audio-player{flex:1;min-width:160px;margin:0}
.folder-sentence-hint{color:var(--muted);font-size:13px;margin:0;font-weight:400}
.folder-empty{color:var(--muted);font-size:14px;margin:14px 0 0;font-weight:400}
.faq{display:grid;gap:16px}.faq details{background:white;border:1px solid var(--line);border-radius:16px;padding:16px}.faq summary{font-weight:700;cursor:pointer}.faq p{color:var(--muted);line-height:1.7}
footer{text-align:center;color:var(--muted);font-size:14px;font-weight:400;margin-top:24px}
.course-unit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.course-unit-card{display:flex;flex-direction:column;align-items:flex-start;text-align:left;text-decoration:none;color:inherit;background:white;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:var(--shadow);min-height:0}
.course-unit-card:hover{border-color:rgba(60,102,148,.45);background:#fbfefe}
.course-unit-num{font-size:13px;font-weight:800;color:var(--teal-dark);letter-spacing:.04em}
.course-unit-title-en{margin:8px 0 6px;font-size:18px;font-weight:800;color:var(--text);line-height:1.35;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.course-unit-title-zh{color:var(--muted);font-size:14px;font-weight:500;line-height:1.5}
.course-unit-count{margin-top:16px;color:var(--muted);font-size:13px;font-weight:500}
.course-unit-layout{display:grid;gap:16px;max-width:none}
#courseHomeView[hidden],
#courseUnitView[hidden]{
  display:none !important;
}
.course-unit-workspace{display:grid;grid-template-columns:minmax(280px,1fr) minmax(340px,1.15fr);gap:22px;align-items:start}
.course-sentence-panel{min-width:0;max-width:none}
.course-sentence-list{display:grid;gap:8px;max-height:calc(100vh - 280px);overflow-y:auto;padding-right:4px}
.course-practice-col{min-width:0;position:sticky;top:24px;align-self:start;z-index:1;max-height:calc(100vh - 48px);overflow-y:auto}
.course-practice-panel{max-width:none}
.course-practice-sentence{border:1.8px solid rgba(60,102,148,.45);border-radius:22px;padding:18px 20px;font-size:20px;line-height:1.65;letter-spacing:.2px;color:var(--text);background:#fffefe;font-family:"SF Mono","Menlo","Consolas",monospace;overflow-wrap:anywhere;word-break:break-word}
.course-practice-translation,
.practice-translation{margin:10px 2px 8px;font-size:15px;line-height:1.65;font-weight:500;color:var(--muted);overflow-wrap:anywhere;word-break:break-word}
.course-practice-translation[hidden],
.practice-translation[hidden]{display:none !important}
.practice-translation{margin-top:16px;margin-bottom:0}
.course-practice-panel .result-top{grid-template-columns:minmax(120px,168px) minmax(0,1fr) minmax(110px,160px);grid-template-areas:none;gap:16px;align-items:center;margin-top:8px;margin-bottom:18px}
.course-practice-panel .score-ring{width:140px;height:140px;margin:0}
.course-practice-panel .score-ring:before{width:104px;height:104px}
.course-practice-panel .score-inner strong{font-size:42px}
.course-practice-panel .character-box,.course-practice-panel .character-missing{width:140px;height:150px;margin:0;overflow:hidden}
.course-practice-panel .metric{grid-template-columns:34px 1fr auto;grid-template-areas:"icon name value" "bar bar bar" "note note note";column-gap:10px;row-gap:8px;padding:14px 0}
.course-practice-panel .metric-icon{grid-area:icon;width:34px;height:34px}
.course-practice-panel .metric-icon img{width:18px;height:18px}
.course-practice-panel .metric-name{grid-area:name;font-size:14px}
.course-practice-panel .value{grid-area:value;font-size:17px}
.course-practice-panel .bar{grid-area:bar}
.course-practice-panel .metric-note{grid-area:note;padding-left:0}
.course-back{display:inline-flex;align-items:center;color:var(--muted);text-decoration:none;font-size:14px;font-weight:500;margin-bottom:2px}
.course-back:hover{color:var(--text)}
.course-unit-kicker{font-size:13px;font-weight:800;color:var(--teal-dark);letter-spacing:.04em;margin-bottom:8px}
.course-unit-heading{margin:0 0 6px;font-size:24px;line-height:1.3;font-weight:800;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.course-unit-subheading{color:var(--muted);font-size:15px;font-weight:500;margin-bottom:8px}
.course-sentence-panel .course-unit-count{margin-top:0;margin-bottom:18px}
button.course-sentence{display:grid;grid-template-columns:42px minmax(0,1fr);align-items:flex-start;justify-content:flex-start;flex-direction:row;gap:10px;width:100%;min-height:56px;text-align:left;background:white;border:1.5px solid var(--line);border-radius:16px;padding:14px 16px;color:var(--text);font-size:16px;font-weight:500;line-height:1.5;cursor:pointer}
button.course-sentence:hover{background:#fbfefe;border-color:rgba(60,102,148,.4)}
button.course-sentence.selected{background:var(--mint);border-color:rgba(60,102,148,.7)}
.course-sentence-num{font-family:"SF Mono","Menlo","Consolas",monospace;font-size:14px;font-weight:700;color:var(--teal-dark);padding-top:1px}
.course-sentence-text{min-width:0;overflow-wrap:anywhere;word-break:break-word;white-space:normal}
/* 側邊欄還在、但視窗沒那麼寬時（例如筆電視窗沒開滿），避免文字被固定寬度的欄位擠到重疊、擠成一字一行。
   角色圖片保留，改成縮小並移到文字下方整行置中，不占用文字的橫向空間。 */
@media(min-width:1101px) and (max-width:1380px){
  .button-row{gap:12px}
  .result-top{grid-template-columns:140px 1fr;grid-template-areas:"ring text" "char char";column-gap:16px;row-gap:12px}
  .score-ring{grid-area:ring;width:140px;height:140px;margin:0}
  .score-ring:before{width:104px;height:104px}
  .result-top>div:nth-child(2){grid-area:text}
  .character-box,.character-missing{grid-area:char;width:130px;height:140px;margin:0 auto;overflow:hidden}
  .course-practice-panel .result-top{grid-template-columns:minmax(110px,140px) minmax(0,1fr) minmax(96px,130px);grid-template-areas:none;gap:12px}
  .course-practice-panel .score-ring{grid-area:auto;width:120px;height:120px;margin:0}
  .course-practice-panel .score-ring:before{width:90px;height:90px}
  .course-practice-panel .score-inner strong{font-size:36px}
  .course-practice-panel .result-top>div:nth-child(2){grid-area:auto}
  .course-practice-panel .character-box,.course-practice-panel .character-missing{grid-area:auto;width:120px;height:130px;margin:0}
}
@media(max-width:1100px){
  html{scroll-padding-bottom: calc(108px + env(safe-area-inset-bottom))}
  main{margin-left:0;padding:24px 18px calc(120px + env(safe-area-inset-bottom))}
  .sidebar{display:none}
  .bottom-nav{display:flex}
  .course-unit-grid{grid-template-columns:1fr}
  .course-unit-heading{font-size:22px}
  .course-unit-workspace{grid-template-columns:1fr}
  .course-sentence-list{max-height:none;overflow:visible;padding-bottom:12px}
  .course-practice-col{position:static;max-height:none;overflow:visible}
  .course-practice-col:not(.is-open){display:none}
  .course-practice-sentence{font-size:18px;padding:16px 18px}
  .course-practice-translation,
  .practice-translation{font-size:14px;margin:8px 2px 6px}
  .practice-translation{margin-top:12px;margin-bottom:0}
  button.course-sentence{min-height:60px;padding:14px 14px}
  .grid{grid-template-columns:1fr}.grid>.card{min-width:0}.result-top{grid-template-columns:1fr}.character-box,.character-missing{width:112px;height:120px;margin:auto;overflow:hidden}
  .course-practice-panel .result-top{grid-template-columns:1fr;grid-template-areas:none;justify-items:center;gap:12px}
  .course-practice-panel .score-ring{grid-area:auto;margin:auto}
  .course-practice-panel .result-top>div:nth-child(2){grid-area:auto;width:100%}
  .course-practice-panel .character-box,.course-practice-panel .character-missing{grid-area:auto;width:104px;height:112px;margin:auto;overflow:hidden}
  .button-row{gap:8px}
  .button-row > button{padding:6px;border-radius:14px;min-height:0}
  .button-row > button img{width:100%;height:auto;max-width:100%;object-fit:contain}
  .voice-row{gap:6px;margin-bottom:14px}
  .voice-row > button.voice-btn{min-height:30px;height:30px;max-height:30px;font-size:13px;padding:0 4px}
  .metric{grid-template-columns:34px 1fr auto;grid-template-areas:"icon name value" "bar bar bar" "note note note";column-gap:10px;row-gap:8px;padding:14px 0}
  .metric-icon{grid-area:icon;width:34px;height:34px}
  .metric-icon img{width:18px;height:18px}
  .metric-name{grid-area:name;font-size:14px}
  .value{grid-area:value;font-size:17px}
  .bar{grid-area:bar}
  .metric-note{grid-area:note;padding-left:0}
  .mini-cards{gap:10px}
  .mini{min-height:128px;padding:12px 8px;gap:6px}
  .mini img{width:28px;height:28px}
  .mini strong{font-size:15px}
  .mini span{font-size:12px}
}