*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#07090f;--bg2:#0d1420;--card:#101724;
  --b:rgba(255,255,255,0.07);--b2:rgba(255,255,255,0.14);
  --t:#dde6f5;--t2:#6d85a3;--t3:#334155;
  --gr:#22c55e;--bl:#3b82f6;--or:#f59e0b;--rd:#ef4444;--cy:#06b6d4;
}
body{background:var(--bg);color:var(--t);font-family:system-ui,-apple-system,sans-serif;min-height:100vh;display:flex;flex-direction:column}
::-webkit-scrollbar{width:4px}::-webkit-scrollbar-thumb{background:#1e3a5f;border-radius:4px}

/* NAV */
.nav{background:rgba(7,9,15,.88);border-bottom:1px solid var(--b);padding:14px 32px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100;backdrop-filter:blur(16px)}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo-mark{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,#2563eb,#06b6d4);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:900;color:#fff;box-shadow:0 0 16px rgba(37,99,235,.35);flex-shrink:0}
.logo-name{font-size:13px;font-weight:700;color:var(--t);line-height:1.2}
.logo-name em{color:var(--bl);font-style:normal}
.logo-tag{font-size:10px;color:var(--t2);letter-spacing:.6px}
.site-back{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:8px;border:1px solid var(--b);background:transparent;color:var(--t2);font-size:12px;font-weight:600;text-decoration:none;transition:all .2s}
.site-back:hover{border-color:rgba(59,130,246,.4);color:var(--t)}

/* MAIN */
.main{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 24px 80px}
.page-badge{display:inline-flex;align-items:center;gap:7px;padding:5px 16px;border-radius:20px;margin-bottom:28px;background:rgba(59,130,246,.1);border:1px solid rgba(59,130,246,.25);color:var(--bl);font-size:12px;font-weight:600;letter-spacing:.5px}
.page-title{font-size:32px;font-weight:800;letter-spacing:-1px;margin-bottom:12px;text-align:center}
.page-sub{font-size:15px;color:var(--t2);line-height:1.7;max-width:480px;margin-bottom:48px;text-align:center}

/* UPLOAD BOX */
.upload-box{width:100%;max-width:560px;background:var(--card);border:2px dashed var(--b);border-radius:20px;padding:52px 40px;text-align:center;cursor:pointer;transition:all .25s;position:relative}
.upload-box:hover,.upload-box.drag{border-color:var(--bl);background:rgba(59,130,246,.05);transform:translateY(-3px);box-shadow:0 16px 48px rgba(59,130,246,.12)}
.upload-box input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}
.upload-icon{font-size:52px;margin-bottom:18px;display:block}
.upload-title{font-size:18px;font-weight:700;margin-bottom:8px}
.upload-sub{font-size:13px;color:var(--t2);margin-bottom:22px}
.upload-formats{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.fmt-tag{padding:4px 12px;border-radius:20px;font-size:11px;font-weight:600;background:rgba(255,255,255,.06);border:1px solid var(--b);color:var(--t2)}

/* PROGRESS (usados por upload.js) */
#progressWrap{display:none;margin-top:24px}
.prog-bar{height:4px;background:rgba(255,255,255,.08);border-radius:2px;overflow:hidden;margin-bottom:10px}
#progressFill{height:100%;background:linear-gradient(90deg,var(--bl),var(--cy));border-radius:2px;transition:width .3s;width:0}
#progressText{font-size:12px;color:var(--t2)}

/* ERROR */
#uploadError{display:none;background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);color:var(--rd);border-radius:10px;padding:12px 16px;font-size:13px;margin-top:16px;text-align:left}

/* COLUMN MAPPER */
#mapper{display:none;width:100%;max-width:560px;background:var(--card);border:1px solid var(--b);border-radius:16px;padding:28px 32px;margin-top:16px}
#mapper h3{font-size:15px;font-weight:600;margin-bottom:6px}
#mapper p{font-size:12px;color:var(--t2);margin-bottom:20px}
.map-row{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.map-label{font-size:12px;color:var(--t2);min-width:180px;text-align:right}
.map-select{flex:1;background:#0d1420;border:1px solid var(--b);color:var(--t);border-radius:7px;padding:7px 10px;font-size:12px;outline:none;cursor:pointer}
.map-select:focus{border-color:var(--bl)}
.map-select option{background:#0d1420;color:var(--t)}
.map-select option:checked,.map-select option:hover{background:#1e3a5f;color:#fff}
.map-btn{width:100%;padding:12px;border-radius:10px;background:var(--bl);color:#fff;border:none;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;margin-top:8px}
.map-btn:hover{background:#2563eb}

/* FEATURES */
.features-row{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap;justify-content:center}
.feat{display:flex;align-items:center;gap:8px;padding:10px 16px;border-radius:10px;background:var(--card);border:1px solid var(--b);font-size:12px;color:var(--t2)}
.feat-dot{width:6px;height:6px;border-radius:50%;background:var(--gr);flex-shrink:0}
.demo-notice{display:flex;align-items:center;gap:8px;margin-top:20px;padding:10px 18px;border-radius:10px;background:rgba(245,158,11,.08);border:1px solid rgba(245,158,11,.2);color:var(--or);font-size:12px}

/* LOADING OVERLAY (usado por upload.js) */
#loadingOverlay{display:none;position:fixed;inset:0;background:rgba(7,9,15,.85);backdrop-filter:blur(8px);z-index:1000;align-items:center;justify-content:center;flex-direction:column;gap:16px}
#loadingOverlay.on{display:flex}
.spinner{width:40px;height:40px;border:3px solid var(--b);border-top-color:var(--bl);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
#loadingMsg{font-size:14px;color:var(--t2)}

.logo-mark-svg{width:32px;height:32px;flex-shrink:0;display:block;border-radius:8px}