:root{--paper:#f7f6f2;--ink:#292d28;--muted:#6c7067;--line:#dedfd6;--accent:#b83c20;--accent-dark:#923019;--soft:#f8eee6;--white:#fff; font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,label.file-picker,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{cursor:default;opacity:.42}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.page{width:min(1140px,100% - 80px);margin:auto}.topbar{height:98px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;font-size:21px;font-weight:750;letter-spacing:-.7px}.brand-mark{display:grid;place-items:center;width:31px;height:31px;margin-right:10px;border-radius:8px;background:var(--accent);color:white;font-size:29px;line-height:1;padding-bottom:4px}.brand-dot{color:var(--accent)}.privacy-badge{font-size:12px;color:#485844;background:#ecf0e7;border:1px solid #dce3d5;padding:8px 12px;border-radius:30px}.privacy-badge span{font-size:8px;color:#557849;margin-right:6px}.intro{padding:53px 0 38px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2px;color:var(--accent);margin:0 0 18px}h1{font-size:clamp(40px,5.2vw,64px);line-height:1.04;letter-spacing:-3px;font-weight:650;margin:0 0 20px}h1 span{color:var(--accent)}.intro-copy{color:var(--muted);font-size:15px;line-height:1.7;margin:0}.workspace{display:grid;grid-template-columns:380px minmax(0,1fr);gap:22px;align-items:start}.upload-panel,.preview-panel{border:1px solid var(--line);border-radius:16px;background:var(--white);padding:25px}.section-heading{display:flex;align-items:center;gap:11px}.step{font-size:11px;color:var(--accent);font-weight:650;border:1px solid #e8c9bd;border-radius:5px;padding:4px 5px}h2{font-size:16px;font-weight:650;letter-spacing:-.3px;margin:0}.drop-zone{border:1.5px dashed #d7b6a5;background:var(--soft);border-radius:10px;margin-top:23px;padding:30px 16px 20px;text-align:center;transition:border-color .15s,background .15s}.drop-zone.drag-over{background:#f5ddce;border-color:var(--accent)}.file-icon{color:var(--accent);margin-bottom:13px}.drop-title{font-size:16px;font-weight:650;margin:0 0 8px}.drop-subtitle{font-size:12px;color:var(--muted);margin:0 0 21px}.button{min-height:44px;border-radius:7px;padding:12px 17px;font-size:13px;font-weight:650;display:inline-flex;justify-content:center;align-items:center;gap:13px;border:1px solid transparent;transition:background .15s}.primary{background:var(--accent);color:white}.primary:hover:not(:disabled){background:var(--accent-dark)}.secondary{background:white;color:var(--ink);border-color:#cdd0c5}.secondary:hover:not(:disabled){background:#f4f5ef}.file-picker{cursor:pointer}#drop-zone:focus-within .file-picker{outline:3px solid var(--accent);outline-offset:4px}.file-limit{font-size:11px;color:var(--muted);margin:14px 0 0}.encoding-row{margin-top:20px;display:flex;align-items:center;justify-content:space-between;gap:10px}.encoding-row label{font-size:12px;font-weight:600;flex-shrink:0}select{min-width:0;max-width:206px;width:60%;padding:8px;border:1px solid var(--line);border-radius:6px;font-size:11px;color:var(--ink);background:white}.encoding-help{font-size:11px;color:var(--muted);line-height:1.6;margin:8px 0 0}.sample-row{border-top:1px solid var(--line);margin-top:20px;padding-top:17px;font-size:12px;display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--muted)}.text-button{padding:4px 0;border:0;background:none;color:var(--accent);font-size:12px;font-weight:600;flex-shrink:0}.text-button:hover:not(:disabled){text-decoration:underline}.status{font-size:12px;line-height:1.65;color:var(--muted);margin:14px 0 0;overflow-wrap:anywhere}.status.error{color:#a52a1e;background:#fff1ed;border-radius:6px;padding:10px;border:1px solid #f0c2b8}.status.success{color:#47643a}.private-note{display:flex;align-items:flex-start;gap:8px;font-size:11px;line-height:1.6;color:var(--muted);margin:20px 0 0}.private-note svg{flex-shrink:0}.preview-header{display:flex;align-items:center;justify-content:space-between;gap:8px}.ready-badge{font-size:10px;background:#edf3e8;color:#47643a;border-radius:20px;padding:5px 9px}[hidden]{display:none!important}.file-info{margin-top:22px;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:12px;color:var(--muted);min-height:25px}#file-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}textarea{display:block;width:100%;min-height:300px;height:330px;resize:vertical;margin-top:10px;border:1px solid #e3e4dc;border-radius:8px;background:#fafbf8;padding:20px;font-size:14px;line-height:1.85;color:var(--ink);overflow-wrap:anywhere;white-space:pre-wrap}textarea::placeholder{color:#878c80;opacity:1}.preview-meta{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:11px;color:var(--muted);margin:13px 0 20px}.actions{display:flex;gap:11px}.actions .primary{flex:1}.actions .secondary{flex:1}.content-note{font-size:11px;color:var(--muted);line-height:1.6;margin:13px 0 0}.action-status{font-size:12px;line-height:1.6;color:#47643a;min-height:19px;margin:7px 0 0}.action-status.error{color:#a52a1e}.how-it-works{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:31px 0 36px}.how-it-works>div{border-left:1px solid var(--line);padding-left:17px}.how-it-works span{font-size:10px;letter-spacing:1.5px;color:var(--muted);font-weight:600}.how-it-works p{margin:9px 0 0;font-size:13px}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;padding:22px 0 29px;font-size:11px;color:var(--muted)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:1400px){.intro{padding-top:65px}.workspace{grid-template-columns:390px minmax(0,1fr)}}
@media(max-width:860px){.page{width:calc(100% - 40px)}.workspace{grid-template-columns:310px minmax(0,1fr);gap:16px}.upload-panel,.preview-panel{padding:20px}.actions{flex-direction:column}.intro{padding:38px 0 30px}h1{letter-spacing:-2px}.content-note{margin-top:12px}}
@media(max-width:690px){.page{width:calc(100% - 32px)}.topbar{height:77px}.brand{font-size:18px}.brand-mark{width:27px;height:27px;font-size:25px}.privacy-badge{font-size:10px;padding:7px 9px}.intro{padding:34px 0 28px}h1{font-size:44px;letter-spacing:-2px}.eyebrow{font-size:9px;letter-spacing:1.5px}.intro-copy{font-size:14px}.desktop-break{display:none}.workspace{grid-template-columns:minmax(0,1fr);gap:18px}.upload-panel,.preview-panel{padding:20px}.drop-zone{padding:23px 12px 18px}.file-icon{width:42px;height:47px}.encoding-row select{font-size:12px}.actions{flex-direction:row;gap:8px}.actions .button{padding:12px 8px;font-size:12px;gap:8px}textarea{height:310px;min-height:220px;font-size:16px;padding:16px}.how-it-works{gap:15px;padding:28px 0}.how-it-works>div{padding-left:10px}.how-it-works span{font-size:8px;letter-spacing:.8px}.how-it-works p{font-size:11px;line-height:1.6}footer{font-size:10px;line-height:1.6}footer span:last-child{text-align:right}}