*{margin:0;padding:0;box-sizing:border-box;}
:root{
    --ta-font:15px;--ta-lh:1.8;--ta-pad:12px;
    --accent:#4a90d9;
    --red:#e02020;--yellow:#e6a800;
    --safe-b:env(safe-area-inset-bottom,0px);
    --safe-t:env(safe-area-inset-top,0px);
}
html,body{height:100%;}
body{
    font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",sans-serif;
    background:#f5f5f5;color:#222;
    padding:calc(10px + var(--safe-t)) 10px calc(96px + var(--safe-b));
    display:flex;justify-content:center;
}
.container{background:#fff;border-radius:14px;box-shadow:0 4px 20px rgba(0,0,0,.08);width:100%;max-width:760px;padding:16px;}

textarea{
    width:100%;min-height:150px;border:2px solid #e0e0e0;border-radius:10px;
    padding:var(--ta-pad);font-size:var(--ta-font);line-height:var(--ta-lh);resize:vertical;
    outline:none;transition:border-color .3s;font-family:inherit;
}
textarea:focus{border-color:var(--accent);}
textarea#output{background:#fafafa;}

.editor{position:relative;width:100%;}
.editor.out{margin-top:14px;}
.editor textarea{position:relative;z-index:1;display:block;}
#inputHighlight,#outputHighlight{
    position:absolute;top:0;left:0;z-index:2;width:100%;height:100%;
    padding:var(--ta-pad);border:2px solid transparent;box-sizing:border-box;
    overflow:hidden;pointer-events:none;
    white-space:pre-wrap;overflow-wrap:break-word;word-break:normal;
    font-family:inherit;font-size:var(--ta-font);line-height:var(--ta-lh);
    color:transparent;
}

.option-group{margin-bottom:14px;}
.option-row{display:flex;gap:10px;}
.option-btn{
    flex:1;min-height:46px;padding:10px 14px;border:2px solid #e0e0e0;border-radius:10px;
    background:#fff;cursor:pointer;font-size:15px;text-align:center;transition:all .2s;
    font-family:inherit;font-weight:600;
}
.option-btn:hover{border-color:var(--accent);background:#f0f7ff;}
.option-btn.full{width:100%;margin-top:10px;}
.option-btn.active-1{border-color:#2b7be4;background:#e8f0fe;color:#2b7be4;}
.option-btn.active-2{border-color:#389e0d;background:#f0ffe8;color:#389e0d;}
.option-btn.active-3{border-color:#d46b08;background:#fff7e6;color:#d46b08;}
.option-btn.active-other{border-color:#666;background:#f0f0f0;color:#333;}

.btn-row{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap;}
button{font-family:inherit;}
.btn-main,.btn-copy,.btn-clear{
    flex:1;min-height:48px;padding:10px 16px;border:none;border-radius:10px;
    font-size:15px;cursor:pointer;transition:all .2s;
}
.btn-main{background:var(--accent);color:#fff;font-weight:600;}
.btn-main:active{background:#3a7bc8;}
.btn-copy{background:#f0f0f0;color:#555;}
.btn-clear{background:#fff;color:#999;border:1px solid #ddd;}

.hint{margin-top:8px;font-size:13px;color:#888;min-height:18px;}
.hint.err{color:var(--red);}
.hint.ok{color:#1a7f37;}

.advice{margin-top:12px;padding:10px 12px;border-radius:10px;background:#fffaf0;border:1px solid #ffe2b0;font-size:13px;color:#8a5a00;display:none;}
.advice.show{display:block;}

/* 底部固定操作条 + 麦克风 */
.actionbar{
    position:fixed;left:0;right:0;bottom:0;z-index:20;
    display:flex;gap:12px;align-items:center;justify-content:center;
    padding:10px 14px calc(10px + var(--safe-b));
    background:rgba(255,255,255,.96);border-top:1px solid #eee;backdrop-filter:blur(6px);
}
.mic-btn{
    width:64px;height:64px;border-radius:50%;border:none;cursor:pointer;
    touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;overscroll-behavior:contain;
    background:var(--accent);color:#fff;font-size:13px;font-weight:700;
    display:flex;align-items:center;justify-content:center;flex-direction:column;
    box-shadow:0 4px 14px rgba(74,144,217,.45);transition:all .2s;flex:0 0 auto;
}
.mic-btn:disabled,.mic-btn.disabled{background:#bbb;box-shadow:none;}
.actionbar .btn-clear,.actionbar .btn-copy{flex:0 0 auto;min-width:58px;padding:10px 12px;}
.mic-btn.recording{background:var(--red);box-shadow:0 0 0 8px rgba(224,32,32,.15);animation:pulse 1.2s infinite;}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(224,32,32,.35);}70%{box-shadow:0 0 0 14px rgba(224,32,32,0);}100%{box-shadow:0 0 0 0 rgba(224,32,32,0);}}
.mic-btn.busy{background:#7aa9d8;box-shadow:0 0 0 6px rgba(74,144,217,.15);animation:pulsebusy 1s infinite;}
@keyframes pulsebusy{0%{opacity:1;}50%{opacity:.55;}100%{opacity:1;}}
.mic-btn .ic{font-size:22px;line-height:1;}
.mic-btn .lb{font-size:10px;margin-top:2px;}

/* 设置弹层 */
.mask{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:30;display:none;}
.mask.show{display:block;}
.panel{
    position:fixed;left:0;right:0;bottom:0;z-index:31;max-height:88vh;overflow:auto;
    background:#fff;border-radius:16px 16px 0 0;padding:18px 16px calc(24px + var(--safe-b));
    transform:translateY(100%);transition:transform .25s ease;
}
.panel.show{transform:translateY(0);}
.panel h2{font-size:17px;margin-bottom:12px;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:13px;color:#666;margin-bottom:6px;}
.field input[type=text],.field input[type=password],.field select,.field textarea{
    width:100%;padding:10px;border:1px solid #ddd;border-radius:8px;font-size:14px;font-family:inherit;
    min-height:auto;
}
.field textarea{min-height:90px;line-height:1.6;}
.field .desc{font-size:12px;color:#999;margin-top:4px;line-height:1.5;}
.row2{display:flex;gap:10px;}
.row2>*{flex:1;}
.panel .btn-row{margin-top:6px;}
.small{font-size:13px;padding:9px 12px;border-radius:8px;border:1px solid #ddd;background:#fff;cursor:pointer;}
.gear{position:absolute;top:12px;right:14px;font-size:22px;background:none;border:none;cursor:pointer;color:#999;}

@media (max-width:440px){
    :root{--ta-font:14px;--ta-lh:1.7;--ta-pad:10px;}
    .container{padding:12px;}
    .option-btn{font-size:14px;padding:8px 10px;min-height:44px;}
    textarea{min-height:120px;}
}