:root{
  --bg:#f6f8fb;--bg-soft:#ffffff;--card:#ffffff;--glass:#f1f5f9;--txt:#0f172a;--muted:#6b7280;--brand:#4f46e5;--brand-2:#06b6d4;--ok:#059669;--shadow:0 10px 24px rgba(2,6,23,.08)
}
html,body{height:100%;margin:0;background:linear-gradient(180deg,var(--bg-soft),var(--bg));color:var(--txt);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial}
.container{max-width:1280px;margin:0 auto;padding:28px}
@media (max-width:980px){.container{padding:18px}}
.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;gap:12px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px}
.logo{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;color:#fff;box-shadow:var(--shadow)}
.brand h1{margin:0;font-size:22px}
.sub{font-size:13px;color:var(--muted)}
.header-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn{border:0;border-radius:14px;padding:10px 14px;display:inline-flex;align-items:center;gap:8px;background:var(--glass);color:var(--txt);cursor:pointer;box-shadow:var(--shadow);transition:transform .06s ease, box-shadow .2s ease}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:600}
.btn.ok{background:linear-gradient(135deg,#22c55e,#a3e635);color:#fff}
.btn.ghost{background:#fff;border:1px solid #e5e7eb}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn.icon{padding:8px 10px}
.card{background:var(--card);border-radius:20px;box-shadow:var(--shadow);padding:18px;margin-bottom:18px}
.drop{border:2px dashed #cbd5e1;border-radius:18px;padding:26px;text-align:center;background:#f8fafc}
.drop.dragging{border-color:var(--brand)}
.progress{height:8px;background:#e2e8f0;border-radius:999px;overflow:hidden;margin-top:10px}
.progress>div{height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:width .15s ease}
.status{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px;margin-top:6px}
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:10px}
@media (max-width:1200px){.stats{grid-template-columns:repeat(3,1fr)}}
@media (max-width:680px){.stats{grid-template-columns:repeat(2,1fr)}}
.stats-compact{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:10px}
@media (max-width:980px){.stats-compact{grid-template-columns:repeat(2,1fr)}}
.stat{background:#f1f5f9;border-radius:14px;padding:14px;text-align:center}
.stat .k{font-size:20px;font-weight:700}
.stat .l{font-size:12px;color:var(--muted)}
.footer{margin-top:14px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px}
.tips{font-size:12px;color:var(--muted)}
#testOut{font-size:14px;background:#f1f5f9;padding:16px;border-radius:10px;white-space:pre-wrap;text-align:left;line-height:1.8}
.hidden{display:none !important}
.spin{animation:spin 1s linear infinite;transform-origin:center}
@keyframes spin{to{transform:rotate(360deg)}}
.stack{display:flex;gap:8px;flex-wrap:wrap}
.truncate{max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ===== Settings — improved UI ===== */
.settings-wrap{display:grid;grid-template-columns:1fr;gap:12px}
.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:980px){.settings-grid{grid-template-columns:1fr}}
.setting{background:linear-gradient(180deg,#ffffff, #f8fafc);border:1px solid #e5e7eb;border-radius:16px;padding:14px}
.setting-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.setting-title{display:flex;align-items:center;gap:8px;font-weight:600}
.pill{display:inline-flex;gap:6px;align-items:center;background:#eef2ff;color:#3730a3;border-radius:999px;padding:4px 10px;font-size:12px}
.textarea{width:100%;min-height:96px;border:1px solid #e5e7eb;border-radius:12px;padding:10px;background:#ffffff}
.helper{display:flex;justify-content:space-between;align-items:center;margin-top:6px;color:var(--muted);font-size:12px}
.chipbar{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.chip{padding:4px 8px;border-radius:999px;background:#f3f4f6;font-size:12px}
.presetbar{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.preset{padding:4px 8px;border-radius:999px;background:#eef2ff;color:#3730a3;font-size:12px;cursor:pointer;border:1px solid #c7d2fe}
.regex-preview{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;color:#0369a1;background:#f0f9ff;border:1px dashed #bae6fd;border-radius:10px;padding:6px 8px;margin-top:8px}

/* ===== Part 2 upload row (side-by-side, justified) ===== */
.compare-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:820px){.compare-row{grid-template-columns:1fr}}
.compare-item{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border:1px solid #e5e7eb;border-radius:14px;background:#ffffff}
.compare-left{display:flex;align-items:center;gap:10px}
.compare-right{display:flex;align-items:center;gap:8px;min-width:0}
.filename{font-size:12px;color:var(--muted)}
.badge{display:inline-flex;align-items:center;gap:6px;background:#eef2ff;color:#3730a3;border-radius:999px;padding:6px 10px;font-size:12px}
.badge .x{cursor:pointer;display:inline-flex}

/* Sticky Download */
.sticky-actions{position:sticky;bottom:0;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);box-shadow:var(--shadow);border-radius:16px;padding:10px;margin-top:16px;display:none;justify-content:space-between;align-items:center}
.sticky-actions.show{display:flex}