:root{--navy:#071b3b;--navy-2:#0b1f44;--blue:#1463ff;--cyan:#0aa4f6;--green:#168a48;--amber:#b76b00;--red:#c63131;--purple:#7446ca;--ink:#172033;--muted:#65758b;--line:#dde5f1;--surface:#fff;--bg:#f4f7fc;--shadow:0 16px 40px rgba(11,31,68,.08);--radius:18px}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:linear-gradient(135deg,#f7faff,#eef4ff 52%,#f9fbff);min-height:100vh}button,input,select{font:inherit}.app-shell{display:grid;grid-template-columns:264px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:linear-gradient(180deg,#071b3b,#061630);padding:26px 20px;color:#fff;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;margin-bottom:31px}.brand-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#2d7dff,#11b5e5);font-size:22px;font-weight:900;box-shadow:0 12px 28px rgba(20,99,255,.35)}.brand strong,.brand small{display:block}.brand strong{font-size:15px}.brand small{font-size:11px;color:#9fbce9;margin-top:3px}.sidebar nav{display:flex;flex-direction:column;gap:6px}.nav-item{display:flex;align-items:center;gap:12px;width:100%;padding:12px;border:0;border-radius:12px;background:transparent;color:#c9d8f6;text-align:left;font-size:13px;cursor:pointer}.nav-item span{width:22px;text-align:center;font-size:18px}.nav-item:hover,.nav-item.active{color:#fff;background:rgba(255,255,255,.11)}.pilot-card{margin-top:auto;padding:17px;border:1px solid rgba(255,255,255,.12);border-radius:16px;background:rgba(255,255,255,.08)}.pilot-card strong{display:block;margin:6px 0}.pilot-card p{font-size:11px;line-height:1.5;color:#b8c9e8;margin:0 0 13px}.build-progress{height:5px;background:rgba(255,255,255,.12);border-radius:9px;overflow:hidden}.build-progress span{display:block;width:18%;height:100%;background:linear-gradient(90deg,#2d7dff,#11b5e5)}main{padding:0 30px 42px;min-width:0}.topbar{height:92px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(207,219,236,.75);margin-bottom:30px}.eyebrow{font-size:10px;letter-spacing:.14em;font-weight:850;color:#7a8ba3;margin:0}.topbar h1{font-size:24px;color:var(--navy);margin:4px 0 0;letter-spacing:-.03em}.topbar-actions{display:flex;align-items:center;gap:14px}.icon-button{position:relative;border:1px solid var(--line);background:#fff;width:40px;height:40px;border-radius:50%;cursor:pointer}.notification-dot{position:absolute;right:8px;top:7px;width:7px;height:7px;border-radius:50%;background:#ff4b55;border:2px solid #fff}.avatar{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--navy);color:#fff;font-size:12px;font-weight:850}.intro-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}.intro-row h2{font-size:28px;letter-spacing:-.04em;color:var(--navy);margin:0 0 7px}.intro-row p{max-width:720px;line-height:1.55;color:var(--muted);font-size:13px;margin:0}.button{border:0;border-radius:999px;padding:11px 17px;font-size:12px;font-weight:850;cursor:pointer;white-space:nowrap}.button:disabled{opacity:.42;cursor:not-allowed}.button.primary{color:#fff;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 12px 26px rgba(20,99,255,.2)}.button.secondary{background:#fff;border:1px solid var(--line);color:var(--navy)}.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:18px}.metric{display:flex;gap:13px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:17px;box-shadow:0 8px 24px rgba(11,31,68,.04)}.metric-icon{display:grid;place-items:center;width:39px;height:39px;border-radius:12px;font-weight:900}.metric-icon.blue{background:#eaf2ff;color:var(--blue)}.metric-icon.green{background:#e7f7ed;color:var(--green)}.metric-icon.amber{background:#fff4df;color:var(--amber)}.metric-icon.purple{background:#f1ebff;color:var(--purple)}.metric div{min-width:0}.metric small,.metric strong,.metric em{display:block}.metric small{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:#7a8ba3;font-weight:800}.metric strong{font-size:24px;color:var(--navy);line-height:1.12;margin:3px 0}.metric em{font-size:10px;color:var(--muted);font-style:normal}.workspace-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(390px,.82fr);gap:18px;margin-bottom:18px}.panel{background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.upload-panel,.mapping-panel,.preview-panel,.history-panel{padding:20px}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:17px}.panel-heading>div:first-child{display:flex;align-items:center;gap:10px}.panel-heading h3{font-size:15px;margin:0;color:var(--navy)}.step{display:grid;place-items:center;width:26px;height:26px;border-radius:9px;background:#eaf2ff;color:var(--blue);font-size:11px;font-weight:900}.step.muted{background:#e7f7ed;color:var(--green)}.status{display:inline-flex;align-items:center;padding:6px 9px;border-radius:999px;font-size:10px;font-weight:850;white-space:nowrap}.status.neutral{background:#f0f3f8;color:#6d7d92}.status.success{background:#e7f7ed;color:#14763f}.status.warning{background:#fff4df;color:#9b5c00}.drop-zone{min-height:190px;border:1.5px dashed #b7c7dc;border-radius:15px;background:#f9fbff;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;cursor:pointer;transition:.2s}.drop-zone:hover,.drop-zone.dragging{border-color:var(--blue);background:#f0f6ff;transform:translateY(-1px)}.drop-zone input{display:none}.upload-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:#eaf2ff;color:var(--blue);font-size:25px;margin-bottom:12px}.drop-zone strong{font-size:13px;color:var(--navy)}.drop-zone small{font-size:10px;color:var(--muted);margin-top:6px}.sample-line{display:flex;align-items:center;justify-content:center;gap:8px;font-size:11px;color:var(--muted);margin-top:13px}.text-button{border:0;background:transparent;color:var(--blue);font-size:11px;font-weight:850;cursor:pointer;padding:4px}.empty-state{min-height:210px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#8a99ae}.empty-state span{font-size:31px;color:#a9b8ca}.empty-state p{font-size:11px;margin:9px 0}.empty-state.wide{min-height:150px}.empty-state.compact{min-height:70px}.mapping-form{display:grid;grid-template-columns:1fr 1fr;gap:13px}.mapping-form label span{display:flex;align-items:center;justify-content:space-between;font-size:10px;font-weight:800;color:#52647d;margin-bottom:5px}.mapping-form label b,.mapping-form label em{font-size:8px;text-transform:uppercase;letter-spacing:.05em}.mapping-form label b{color:var(--blue)}.mapping-form label em{color:#9aa7b8;font-style:normal}.mapping-form select{width:100%;padding:9px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);font-size:11px}.preview-panel{margin-bottom:18px}.preview-actions{display:flex;gap:8px}.validation-summary{display:flex;gap:10px;margin-bottom:15px}.summary{flex:1;padding:11px 13px;border-radius:11px;display:flex;flex-direction:column;gap:3px}.summary strong{font-size:12px}.summary span{font-size:10px}.summary.success{background:#ebf8ef;color:#176b3b}.summary.warning{background:#fff5e4;color:#895500}.summary.danger{background:#ffeded;color:#9f2828}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px}table{width:100%;border-collapse:collapse;white-space:nowrap;font-size:11px}th{text-align:left;background:#f7f9fc;color:#63748c;font-size:9px;text-transform:uppercase;letter-spacing:.07em;padding:10px 12px}td{padding:11px 12px;border-top:1px solid #e9eef5}tr.invalid-row{background:#fffafa}.row-status{font-size:9px;font-weight:850;padding:5px 7px;border-radius:999px}.row-status.valid{background:#e7f7ed;color:#14763f}.row-status.invalid{background:#ffe9e9;color:#b62b2b}.issues{color:#a13232}.table-note{font-size:9px;color:#8a99ae;margin:9px 2px 0}.history-list{display:flex;flex-direction:column}.history-item{display:grid;grid-template-columns:34px minmax(0,1fr) minmax(0,.6fr) auto;align-items:center;gap:12px;padding:12px 4px;border-top:1px solid #edf1f6}.history-icon{display:grid;place-items:center;width:30px;height:30px;border-radius:10px;background:#e7f7ed;color:var(--green);font-weight:900}.history-item strong,.history-item small{display:block}.history-item strong{font-size:11px}.history-item small{font-size:9px;color:var(--muted);margin-top:3px}.placeholder-card{max-width:720px;margin:80px auto;padding:60px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.placeholder-card h2{font-size:32px;color:var(--navy);margin:10px 0}.placeholder-card p{font-size:13px;color:var(--muted);line-height:1.6;margin:0 0 22px}.toast{position:fixed;right:24px;bottom:24px;max-width:390px;padding:13px 17px;border-radius:12px;background:#0b274f;color:#fff;font-size:12px;box-shadow:0 15px 35px rgba(7,27,59,.25);opacity:0;transform:translateY(15px);pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:translateY(0)}.toast.error{background:#9e2929}.hidden{display:none!important}@media(max-width:1050px){.app-shell{grid-template-columns:1fr}.sidebar{position:relative;height:auto;padding:18px}.brand{margin-bottom:16px}.sidebar nav{display:grid;grid-template-columns:repeat(4,1fr)}.pilot-card{display:none}.metrics{grid-template-columns:repeat(2,1fr)}.workspace-grid{grid-template-columns:1fr}}@media(max-width:680px){main{padding:0 16px 30px}.topbar{height:76px;margin-bottom:22px}.sidebar nav{grid-template-columns:1fr 1fr}.intro-row{align-items:stretch;flex-direction:column}.metrics{grid-template-columns:1fr}.mapping-form{grid-template-columns:1fr}.panel-heading{align-items:flex-start}.preview-panel .panel-heading{flex-direction:column}.validation-summary{flex-direction:column}.history-item{grid-template-columns:34px 1fr}.history-item>div:nth-child(3),.history-item>.status{grid-column:2}.sample-line{flex-direction:column}}