:root{--bg:#060b16;--panel:#0b1324;--panel2:#0f1a30;--line:#1d2a42;--text:#f6f8fc;--muted:#8793aa;--red:#e21d3f;--red2:#ff3557;--navy:#101e37}
*,*::before,*::after{box-sizing:border-box}
/* Any class below this point that sets its own `display` (e.g. .import-overlay,
   .grid-toolbar with display:flex) would otherwise silently defeat the plain
   `hidden` attribute - author styles beat the browser's default [hidden]{display:none}
   rule regardless of selector specificity. This makes `hidden` win unconditionally. */
[hidden]{display:none!important}
html{color-scheme:dark}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;min-height:100vh;display:flex;flex-direction:column}
a{color:inherit;text-decoration:none}
code{font-family:'Consolas',monospace;background:#0a1222;padding:1px 5px;border-radius:4px;font-size:12px}

.ambient{position:fixed;inset:0;pointer-events:none;background:radial-gradient(circle at 50% -15%,rgba(27,56,101,.44),transparent 37%),radial-gradient(circle at 85% 20%,rgba(226,29,63,.08),transparent 20%);z-index:-1}

/* Top bar */
.topbar{height:64px;flex-shrink:0;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:rgba(6,11,22,.85);backdrop-filter:blur(14px);position:sticky;top:0;z-index:30}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;background:linear-gradient(135deg,var(--red2),#a50c29);font-weight:900;border-radius:8px;font-size:13px;box-shadow:0 6px 18px rgba(226,29,63,.28)}
.brand-text{font-weight:800;font-size:15px}
.brand-logo{height:34px;width:auto;display:block}
.topbar-actions{display:flex;align-items:center;gap:12px}
.user-chip{font-size:12px;color:var(--muted);background:#0a1222;border:1px solid var(--line);border-radius:20px;padding:6px 14px}
.user-chip.muted{color:var(--muted);font-weight:600}

/* Buttons */
.button{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:8px;padding:9px 16px;font-weight:700;font-size:13px;border:1px solid var(--line);background:#0e1728;color:var(--text);cursor:pointer}
.button:hover{border-color:#33445f}
.button:disabled{opacity:.5;cursor:not-allowed}
.button.primary{background:linear-gradient(135deg,var(--red2),#c51031);color:#fff;border:0;box-shadow:0 6px 16px rgba(226,29,63,.22)}
.button.danger{color:#ff8296;border-color:rgba(226,29,63,.35)}
.button.small{padding:5px 10px;font-size:11px}

/* Tab bar */
.tab-bar{display:flex;align-items:center;gap:4px;padding:8px 16px 0;background:var(--panel);border-bottom:1px solid var(--line);overflow-x:auto;flex-shrink:0}
.tab{display:flex;align-items:center;gap:8px;padding:9px 14px;border-radius:8px 8px 0 0;font-size:12px;font-weight:700;color:var(--muted);background:transparent;cursor:pointer;white-space:nowrap;border:1px solid transparent;border-bottom:none}
.tab:hover{color:var(--text)}
.tab.active{color:var(--text);background:var(--bg);border-color:var(--line)}
.tab .dot{width:6px;height:6px;border-radius:50%;background:var(--red2);display:none}
.tab.dirty .dot{display:inline-block}
.tab-close{opacity:.6;font-size:14px;line-height:1}
.tab-close:hover{opacity:1;color:var(--red2)}

/* Workspace */
main{flex:1;display:flex;flex-direction:column;min-height:0}

.empty-state{margin:auto;text-align:center;padding:60px 20px;color:var(--muted);max-width:440px}
.empty-state b{font-size:40px;color:var(--red2);display:block;margin-bottom:10px}
.empty-state h2{color:#fff;margin:0 0 10px}
.empty-state p{font-size:13px;line-height:1.7;margin:0 0 20px}

.grid-toolbar{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid var(--line);background:var(--panel);flex-shrink:0}
.grid-status{font-size:12px;color:var(--muted)}
.grid-toolbar-actions{display:flex;gap:8px}

.grid-scroll{flex:1;overflow:auto;position:relative;background:var(--bg)}

.grid-header{display:flex;position:sticky;top:0;z-index:5;background:var(--panel2);border-bottom:2px solid var(--line);width:max-content;min-width:100%}
.grid-header-cell{display:flex;align-items:center;justify-content:space-between;gap:4px;padding:0 8px;height:32px;font-size:11px;font-weight:800;color:#c7d1e3;border-right:1px solid var(--line);flex-shrink:0;white-space:nowrap;overflow:hidden}
.grid-header-cell .col-menu-btn{opacity:.5;cursor:pointer;padding:2px 4px;border-radius:4px;flex-shrink:0}
.grid-header-cell .col-menu-btn:hover{opacity:1;background:rgba(255,255,255,.08)}
.grid-header-rownum{width:44px;flex-shrink:0;border-right:1px solid var(--line)}

.grid-spacer{position:relative;width:max-content;min-width:100%}
.grid-rows{position:absolute;left:0;right:0}

.grid-row{display:flex;height:28px;border-bottom:1px solid rgba(29,42,66,.5)}
.grid-row.selected{background:rgba(226,29,63,.08)}
.grid-rownum{width:44px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:10px;color:var(--muted);border-right:1px solid var(--line);cursor:pointer;background:var(--panel);position:sticky;left:0;z-index:2}
.grid-rownum:hover{color:#fff;background:var(--panel2)}
.grid-cell{flex-shrink:0;border-right:1px solid rgba(29,42,66,.5);padding:0}
.grid-cell input{width:100%;height:28px;background:transparent;border:0;outline:0;color:var(--text);font-size:12px;padding:0 8px;font-family:inherit}
.grid-cell input:focus{background:#101d34;box-shadow:inset 0 0 0 1px var(--red2)}

/* Column/row context menus */
.menu{position:fixed;z-index:100;background:#0d1626;border:1px solid var(--line);border-radius:10px;box-shadow:0 20px 45px rgba(0,0,0,.45);min-width:230px;padding:6px;font-size:12px}
.menu h4{margin:6px 8px;font-size:10px;letter-spacing:1px;color:var(--muted);text-transform:uppercase}
.menu-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:6px;cursor:pointer}
.menu-item:hover{background:rgba(255,255,255,.06)}
.menu-item.danger{color:#ff8296}
.menu-row{display:flex;gap:6px;padding:6px 8px}
.menu-row input{flex:1;background:#0a1222;border:1px solid var(--line);border-radius:6px;color:var(--text);padding:6px 8px;font-size:12px}
.menu hr{border:none;border-top:1px solid var(--line);margin:6px 0}

/* Import overlay */
.import-overlay{position:fixed;inset:0;z-index:200;background:rgba(6,11,22,.78);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center}
.import-card{width:320px;padding:32px 28px;background:var(--panel2);border:1px solid var(--line);border-radius:14px;text-align:center;box-shadow:0 30px 60px rgba(0,0,0,.5)}
.import-card h3{margin:14px 0 20px;font-size:15px}
.spinner{width:34px;height:34px;margin:0 auto;border-radius:50%;border:3px solid rgba(255,255,255,.12);border-top-color:var(--red2);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.progress-track{height:8px;border-radius:5px;background:#0a1222;border:1px solid var(--line);overflow:hidden}
.progress-fill{height:100%;width:0%;border-radius:5px;background:linear-gradient(90deg,var(--red2),var(--red));transition:width .2s ease}
.progress-fill.indeterminate{width:40%!important;animation:indeterminate 1.1s ease-in-out infinite}
@keyframes indeterminate{0%{margin-left:-40%}100%{margin-left:100%}}
.progress-pct{margin-top:8px;font-size:12px;font-weight:800;color:var(--text)}
.import-stage{margin-top:6px;font-size:11px;color:var(--muted)}

/* Export login-required popup (reuses .import-overlay/.import-card) */
.lock-icon{display:block;font-size:28px;margin-bottom:4px}
.export-login-text{font-size:12px;color:var(--muted);line-height:1.7;margin:0 0 20px}
.export-login-actions{display:flex;flex-direction:column;gap:8px}
.export-retry-status{margin:12px 0 0;font-size:11px;color:var(--muted);min-height:14px}
.export-retry-status.error{color:var(--red2)}

/* Toast (bottom-center, brief confirmation e.g. after Export) */
.toast{
    position:fixed;left:50%;bottom:28px;z-index:300;
    transform:translate(-50%,20px);
    background:var(--panel2);border:1px solid var(--line);border-radius:10px;
    padding:12px 20px;font-size:13px;font-weight:700;color:var(--text);
    box-shadow:0 20px 45px rgba(0,0,0,.45);
    opacity:0;transition:opacity .2s ease,transform .2s ease;pointer-events:none;
}
.toast.visible{opacity:1;transform:translate(-50%,0)}
.toast.error{border-color:rgba(226,29,63,.4);color:#ff8296}

@media(max-width:760px){
    .grid-toolbar{flex-wrap:wrap;gap:8px}
}