:root{
  --bg:#f7f8fb;
  --bg-card:#ffffff;
  --text:#1c2230;
  --text-muted:#5c6470;
  --brand:#3457ff;
  --brand-dark:#2540c9;
  --brand-light:#eef1ff;
  --border:#e3e6ee;
  --success:#1c9a5b;
  --danger:#d1443c;
  --radius:14px;
  --shadow:0 2px 10px rgba(20,25,50,.06);
  --shadow-lg:0 10px 30px rgba(20,25,50,.10);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.55;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}

.container{max-width:1120px;margin:0 auto;padding:0 20px}

/* Header */
header.site-header{
  background:var(--bg-card);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:50;
}
.site-header .bar{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 20px;max-width:1120px;margin:0 auto;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--text)}
.brand:hover{text-decoration:none}
.brand .logo{
  width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--brand),#7b8dff);
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:.95rem;
}
.header-links{display:flex;gap:18px;font-size:.92rem;color:var(--text-muted)}
.header-links a{color:var(--text-muted)}

/* Hero */
.hero{padding:56px 20px 36px;text-align:center}
.hero h1{font-size:2.2rem;margin:0 0 12px;letter-spacing:-.02em}
.hero p{color:var(--text-muted);max-width:620px;margin:0 auto 22px;font-size:1.05rem}
.hero-badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:6px}
.badge{
  background:var(--brand-light);color:var(--brand-dark);
  padding:6px 14px;border-radius:999px;font-size:.82rem;font-weight:600;
}

/* Tool grid */
.category-block{margin:34px 0}
.category-title{font-size:1.05rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin:0 0 14px;font-weight:700}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.tool-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px;display:flex;flex-direction:column;gap:8px;box-shadow:var(--shadow);
  transition:transform .12s ease, box-shadow .12s ease; color:var(--text);
}
.tool-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);text-decoration:none}
.tool-card .icon{font-size:1.7rem}
.tool-card h3{margin:0;font-size:1rem}
.tool-card p{margin:0;color:var(--text-muted);font-size:.86rem}

/* Tool page layout */
.tool-page-header{padding:34px 20px 10px;text-align:center}
.tool-page-header h1{margin:0 0 8px;font-size:1.7rem}
.tool-page-header p{color:var(--text-muted);max-width:560px;margin:0 auto}

.workspace{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);margin:24px 0;
}

.dropzone{
  border:2px dashed #c7cde0;border-radius:var(--radius);
  padding:44px 20px;text-align:center;cursor:pointer;
  background:#fbfcff;transition:border-color .15s, background .15s;
}
.dropzone.drag{border-color:var(--brand);background:var(--brand-light)}
.dropzone .dz-icon{font-size:2.2rem;margin-bottom:8px}
.dropzone .dz-title{font-weight:600;margin-bottom:4px}
.dropzone .dz-sub{color:var(--text-muted);font-size:.85rem}
.dropzone input[type=file]{display:none}

.file-list{margin:16px 0;display:flex;flex-direction:column;gap:8px}
.file-row{
  display:flex;align-items:center;gap:10px;background:#fafbfe;border:1px solid var(--border);
  border-radius:10px;padding:10px 12px;font-size:.9rem;
}
.file-row .name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-row button{background:none;border:none;color:var(--danger);cursor:pointer;font-size:.85rem}
.file-row.draggable{cursor:grab}
.file-row .thumb{width:36px;height:46px;object-fit:cover;border-radius:4px;border:1px solid var(--border)}

.controls-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:16px 0}
label.field-label{font-size:.85rem;color:var(--text-muted);font-weight:600;display:block;margin-bottom:4px}
input[type=text],input[type=number],input[type=password],input[type=url],select,textarea{
  border:1px solid var(--border);border-radius:8px;padding:9px 11px;font-size:.92rem;
  font-family:inherit;background:#fff;color:var(--text);
}
textarea{width:100%;min-height:90px;resize:vertical}
.field{display:flex;flex-direction:column;gap:2px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--brand);color:#fff;border:none;border-radius:10px;
  padding:12px 22px;font-size:.95rem;font-weight:600;cursor:pointer;
  transition:background .15s;
}
.btn:hover{background:var(--brand-dark);text-decoration:none}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.secondary{background:var(--brand-light);color:var(--brand-dark)}
.btn.secondary:hover{background:#dfe4ff}
.btn.ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}

.progress-wrap{margin:16px 0;display:none}
.progress-wrap.show{display:block}
.progress-bar{height:8px;border-radius:99px;background:var(--border);overflow:hidden}
.progress-bar > div{height:100%;background:var(--brand);width:0%;transition:width .2s}
.progress-label{font-size:.82rem;color:var(--text-muted);margin-top:6px}

.status-msg{margin:14px 0;padding:12px 14px;border-radius:10px;font-size:.9rem;display:none}
.status-msg.show{display:block}
.status-msg.info{background:var(--brand-light);color:var(--brand-dark)}
.status-msg.success{background:#e6f7ee;color:var(--success)}
.status-msg.error{background:#fbe9e8;color:var(--danger)}

.result-box{display:none;margin-top:18px;text-align:center;padding:20px;border-radius:12px;background:#f3fbf6;border:1px solid #cdefdc}
.result-box.show{display:block}
.result-box .big-icon{font-size:2rem;margin-bottom:6px}

.privacy-note{
  display:flex;gap:10px;align-items:flex-start;background:var(--brand-light);
  border-radius:10px;padding:12px 14px;font-size:.85rem;color:var(--brand-dark);margin-top:18px;
}

.info-section{margin:40px 0}
.info-section h2{font-size:1.3rem;margin-bottom:10px}
.info-section p{color:var(--text-muted)}

details.faq-item{border-bottom:1px solid var(--border);padding:14px 0}
details.faq-item summary{cursor:pointer;font-weight:600}
details.faq-item p{color:var(--text-muted);margin:10px 0 0}

footer.site-footer{
  border-top:1px solid var(--border);margin-top:60px;padding:30px 20px;
  color:var(--text-muted);font-size:.85rem;text-align:center;
}
footer.site-footer a{color:var(--text-muted);text-decoration:underline}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media (max-width:720px){
  .grid-2{grid-template-columns:1fr}
  .hero h1{font-size:1.7rem}
}

.thumb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:12px;margin:16px 0}
.thumb-card{border:1px solid var(--border);border-radius:10px;overflow:hidden;background:#fff;text-align:center}
.thumb-card img{width:100%;display:block}
.thumb-card .cap{font-size:.75rem;color:var(--text-muted);padding:4px}

.checkbox-row{display:flex;align-items:center;gap:8px;font-size:.9rem}

table.data-preview{width:100%;border-collapse:collapse;font-size:.82rem;margin-top:10px}
table.data-preview th,table.data-preview td{border:1px solid var(--border);padding:6px 8px;text-align:left}

code.inline{background:#f0f1f6;padding:2px 6px;border-radius:5px;font-size:.85em}