/* ===========================================================
 * PDFnoted 工具箱 — styles（独立页面，不依赖 app.css）
 * =========================================================== */
:root{
  --tb-bg:#0f1115; --tb-card:#171a21; --tb-card2:#1d212b;
  --tb-line:#2a2f3a; --tb-text:#e7eaf0; --tb-muted:#9aa3b2;
  --tb-primary:#4f8cff; --tb-primary2:#7c5cff; --tb-ok:#3ecf8e;
  --tb-radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--tb-bg); color:var(--tb-text); line-height:1.6; -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.tb-inner{max-width:1080px;margin:0 auto;padding:0 20px}

/* 顶栏 */
.tb-header{border-bottom:1px solid var(--tb-line);background:rgba(15,17,21,.85);backdrop-filter:blur(8px);position:sticky;top:0;z-index:20}
.tb-header .tb-inner{display:flex;align-items:center;height:60px;gap:24px}
.tb-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.tb-logo-mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--tb-primary),var(--tb-primary2));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800}
.tb-nav{display:flex;gap:18px;font-size:14px;color:var(--tb-muted)}
.tb-nav a:hover{color:var(--tb-text)}
.tb-nav a.active{color:var(--tb-text);font-weight:600}
.tb-lang{margin-left:auto;background:var(--tb-card2);border:1px solid var(--tb-line);color:var(--tb-text);border-radius:8px;padding:6px 12px;cursor:pointer;font-size:13px}
.tb-lang:hover{border-color:var(--tb-primary)}

/* Hero */
.tb-hero{padding:46px 0 26px;text-align:center}
.tb-hero-badge{display:inline-block;background:rgba(62,207,142,.12);color:var(--tb-ok);border:1px solid rgba(62,207,142,.3);padding:5px 14px;border-radius:999px;font-size:13px;margin-bottom:16px}
.tb-hero-title{font-size:40px;margin:0 0 12px;background:linear-gradient(135deg,#fff,#a9b6ff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.tb-hero-desc{color:var(--tb-muted);max-width:680px;margin:0 auto;font-size:15px}

/* 网格 */
.tb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;padding:20px 0 40px}
.tb-card{background:var(--tb-card);border:1px solid var(--tb-line);border-radius:var(--tb-radius);padding:18px;cursor:pointer;transition:.18s;display:flex;flex-direction:column;gap:8px}
.tb-card:hover{transform:translateY(-3px);border-color:var(--tb-primary);box-shadow:0 8px 28px rgba(79,140,255,.12)}
.tb-card-icon{font-size:26px}
.tb-card-title{font-weight:650;font-size:16px}
.tb-card-desc{color:var(--tb-muted);font-size:13px;flex:1}
.tb-card-tag{font-size:11px;color:var(--tb-primary);opacity:.85}

/* 工作区 */
.tb-workspace{padding:14px 0 50px}
.tb-back{background:none;border:none;color:var(--tb-muted);cursor:pointer;font-size:14px;margin-bottom:14px}
.tb-back:hover{color:var(--tb-text)}
.tb-ws-head{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.tb-ws-icon{font-size:34px}
.tb-ws-head h2{margin:0;font-size:22px}
.tb-ws-desc{margin:2px 0 0;color:var(--tb-muted);font-size:14px}

.tb-drop{border:2px dashed var(--tb-line);border-radius:var(--tb-radius);padding:30px;text-align:center;background:var(--tb-card)}
.tb-drop.drag{border-color:var(--tb-primary);background:rgba(79,140,255,.06)}
.tb-drop-icon{font-size:40px;margin-bottom:8px}
.tb-muted{color:var(--tb-muted);font-size:13px}
.tb-filelist{list-style:none;padding:0;margin:14px 0 0;text-align:left}
.tb-filelist li{background:var(--tb-card2);border:1px solid var(--tb-line);border-radius:10px;padding:10px 12px;margin-top:8px;display:flex;justify-content:space-between;align-items:center;font-size:13px}
.tb-filelist .x{cursor:pointer;color:var(--tb-muted);margin-left:10px}
.tb-filelist .x:hover{color:#ff6b6b}

.tb-options{margin:18px 0;display:flex;flex-direction:column;gap:14px}
.tb-field{display:flex;flex-direction:column;gap:6px}
.tb-field label{font-size:13px;color:var(--tb-muted)}
.tb-field input,.tb-field textarea,.tb-field select{
  background:var(--tb-card2);border:1px solid var(--tb-line);color:var(--tb-text);border-radius:9px;padding:10px 12px;font-size:14px;font-family:inherit;width:100%;
}
.tb-field input[type=range]{padding:0}
.tb-row{display:flex;gap:12px;flex-wrap:wrap}
.tb-row .tb-field{flex:1;min-width:160px}
.tb-check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--tb-text)}
.tb-hint{font-size:12px;color:var(--tb-muted)}

.tb-actions{display:flex;gap:12px;margin-top:8px;flex-wrap:wrap}
.tb-btn{border:1px solid var(--tb-line);background:var(--tb-card2);color:var(--tb-text);border-radius:10px;padding:11px 18px;font-size:14px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;font-family:inherit}
.tb-btn:hover{border-color:var(--tb-primary)}
.tb-btn-primary{background:linear-gradient(135deg,var(--tb-primary),var(--tb-primary2));border:none;color:#fff;font-weight:600}
.tb-btn-primary:disabled{opacity:.45;cursor:not-allowed}
.tb-btn-lg{padding:13px 26px;font-size:15px}
.tb-btn-ghost{background:transparent}

.tb-progress{margin-top:18px}
.tb-progress-bar{height:8px;background:var(--tb-card2);border-radius:999px;overflow:hidden}
.tb-progress-bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--tb-primary),var(--tb-ok));transition:width .2s}
.tb-result{margin-top:16px;background:rgba(62,207,142,.08);border:1px solid rgba(62,207,142,.3);border-radius:12px;padding:14px 16px;font-size:14px;color:var(--tb-ok)}
.tb-result.err{background:rgba(255,107,107,.08);border-color:rgba(255,107,107,.35);color:#ff8a8a}

.tb-footer{border-top:1px solid var(--tb-line);padding:24px 0;margin-top:20px;text-align:center;color:var(--tb-muted);font-size:13px}

@media (max-width:640px){
  .tb-hero-title{font-size:30px}
  .tb-nav{display:none}
  .tb-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
}