:root{
  --bg:#f4f6fa; --panel:#ffffff; --ink:#18202e; --muted:#5d6779; --line:#dde2ea; --line2:#eef1f5;
  --brand:#14213d; --brand2:#1f3157; --accent:#2f6fdf; --accent-soft:#e6efff;
  --green:#1f9d55; --green-soft:#e3f5ea; --yellow:#c98a00; --yellow-soft:#fff4d6; --red:#d23f3f; --red-soft:#fde8e8;
  --radius:8px; --shadow:0 1px 2px rgba(20,33,61,.06),0 2px 8px rgba(20,33,61,.05);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans","Noto Sans Tamil",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
body.dark{--bg:#0f141d;--panel:#171e2b;--ink:#e6eaf2;--muted:#9aa5b8;--line:#2a3446;--line2:#202939;--accent-soft:#1b2b4d;
  --green-soft:#12301f;--yellow-soft:#3a2f10;--red-soft:#3b1717;--brand:#0b1220;--brand2:#16223a}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--font);font-size:14px;color:var(--ink);background:var(--bg);line-height:1.45}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
h1{font-size:22px;margin:0 0 4px} h2{font-size:17px;margin:18px 0 8px} h3{font-size:14.5px;margin:14px 0 6px}
.muted{color:var(--muted)} .small{font-size:12px} .pad{padding:14px} .mono{font-family:var(--mono);font-size:12px}
.right{text-align:right} .nowrap{white-space:nowrap} .hide{display:none!important}
/* top bar */
.top{display:flex;align-items:center;gap:18px;background:var(--brand);color:#fff;padding:0 18px;height:50px;position:sticky;top:0;z-index:50}
.top .logo{font-weight:700;letter-spacing:.2px;display:flex;align-items:center;gap:8px;color:#fff}
.top .logo b{background:#2f6fdf;border-radius:6px;padding:2px 7px;font-size:12px}
.top nav{display:flex;gap:2px;flex:1;flex-wrap:wrap}
.top nav a{color:#c9d3e6;padding:6px 10px;border-radius:6px;font-size:13px}
.top nav a:hover,.top nav a.on{background:var(--brand2);color:#fff;text-decoration:none}
.top .who{font-size:12.5px;color:#c9d3e6;display:flex;gap:10px;align-items:center}
.top .who a{color:#fff}
.wrap{max-width:1380px;margin:0 auto;padding:22px 22px 60px}
.head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:14px;flex-wrap:wrap}
/* cards, grids */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.grid{display:grid;gap:14px} .g2{grid-template-columns:repeat(2,minmax(0,1fr))} .g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))} .g5{grid-template-columns:repeat(5,minmax(0,1fr))}
@media(max-width:900px){.g2,.g3,.g4,.g5{grid-template-columns:1fr}}
.kpi{padding:14px 16px}.kpi .v{font-size:26px;font-weight:700}.kpi .l{color:var(--muted);font-size:12.5px}
/* tables */
table.t{width:100%;border-collapse:collapse;background:var(--panel)}
table.t th,table.t td{padding:7px 9px;border-bottom:1px solid var(--line2);text-align:left;vertical-align:top}
table.t th{font-size:11.5px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);font-weight:600;background:var(--line2);position:sticky;top:0}
table.t tr:hover td{background:rgba(47,111,223,.04)}
table.t.compact th,table.t.compact td{padding:4px 6px;font-size:12.5px}
.tablebox{border:1px solid var(--line);border-radius:var(--radius);overflow:auto;max-height:70vh}
/* forms */
input[type=text],input[type=password],input[type=number],input[type=date],input:not([type]),select,textarea{
  font:inherit;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:6px 9px;width:100%}
textarea{font-family:var(--mono);font-size:12.5px;min-height:90px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
label{display:block;font-size:12.5px;font-weight:600;margin:10px 0 4px;color:var(--muted)}
label.inline{display:inline-flex;align-items:center;gap:6px;font-weight:500;color:var(--ink);margin:4px 12px 4px 0}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap} .row > *{flex:0 0 auto}
.btn{display:inline-flex;align-items:center;gap:6px;font:inherit;font-size:13px;font-weight:600;border:1px solid var(--line);
  background:var(--panel);color:var(--ink);padding:6px 12px;border-radius:6px;cursor:pointer;white-space:nowrap}
.btn:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover{background:#2560c8;color:#fff}
.btn.green{background:var(--green);border-color:var(--green);color:#fff}
.btn.red{color:var(--red)} .btn.small{padding:3px 8px;font-size:12px} .btn.tiny{padding:1px 6px;font-size:11px;font-weight:500}
.btn[disabled]{opacity:.5;cursor:not-allowed}
kbd{font-family:var(--mono);font-size:10.5px;border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;padding:0 4px;color:var(--muted);background:var(--line2)}
/* badges */
.b{display:inline-block;border-radius:20px;padding:1px 8px;font-size:11.5px;font-weight:600;background:var(--line2);color:var(--muted);white-space:nowrap}
.b.red{background:var(--red-soft);color:var(--red)}.b.yellow{background:var(--yellow-soft);color:var(--yellow)}
.b.green{background:var(--green-soft);color:var(--green)}.b.blue{background:var(--accent-soft);color:var(--accent)}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--muted);vertical-align:middle}
.dot.red{background:var(--red)}.dot.yellow{background:#e7a700}.dot.green{background:var(--green)}
.flash{padding:9px 13px;border-radius:6px;margin-bottom:10px;border:1px solid var(--line)}
.flash.ok{background:var(--green-soft);border-color:#b9e3c8}.flash.error{background:var(--red-soft);border-color:#f3c2c2}
.flash.warn{background:var(--yellow-soft);border-color:#f0dc9c}
.progress{height:6px;background:var(--line2);border-radius:4px;overflow:hidden;min-width:80px}
.progress i{display:block;height:100%;background:var(--accent)}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:12px;flex-wrap:wrap}
.tabs a{padding:7px 12px;border:1px solid transparent;border-bottom:none;border-radius:6px 6px 0 0;color:var(--muted);font-weight:600;font-size:13px}
.tabs a.on{background:var(--panel);border-color:var(--line);color:var(--ink);margin-bottom:-1px}
.stagebar{display:flex;gap:3px;flex-wrap:wrap}.stagebar i{width:12px;height:8px;border-radius:2px;background:var(--line)}
.stagebar i.completed{background:var(--green)}.stagebar i.current{background:var(--accent)}.stagebar i.needs_recheck{background:#e7a700}
.login{max-width:380px;margin:9vh auto}.login .card{padding:26px}
.chip{display:inline-flex;gap:4px;align-items:center;background:var(--line2);border-radius:5px;padding:1px 6px;font-size:12px;margin:2px}
details summary{cursor:pointer;font-weight:600}
pre.code{background:var(--line2);padding:10px;border-radius:6px;overflow:auto;font-size:12px;max-height:340px}

/* ================= workspace ================= */
body.ws{overflow:hidden}
.ws-root{display:grid;grid-template-rows:auto auto 1fr auto;height:calc(100vh - 50px)}
.stepper{display:flex;gap:2px;padding:6px 10px;background:var(--panel);border-bottom:1px solid var(--line);overflow-x:auto}
.stepper a{display:flex;align-items:center;gap:5px;padding:4px 8px;border-radius:6px;font-size:11.5px;color:var(--muted);
  border:1px solid var(--line);white-space:nowrap;cursor:pointer;background:var(--panel)}
.stepper a .n{font-weight:700;width:18px;height:18px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  font-size:10.5px;background:var(--line2);color:var(--muted)}
.stepper a.completed .n{background:var(--green);color:#fff}.stepper a.current .n{background:var(--accent);color:#fff}
.stepper a.needs_recheck .n{background:#e7a700;color:#fff}.stepper a.locked{opacity:.45;cursor:not-allowed}
.stepper a.on{border-color:var(--accent);color:var(--ink);background:var(--accent-soft);font-weight:600}
.stepper a:hover{text-decoration:none}
.stepper .cnt{font-size:10px;font-weight:700;border-radius:8px;padding:0 4px}
.stepper .cnt.r{background:var(--red-soft);color:var(--red)}.stepper .cnt.y{background:var(--yellow-soft);color:var(--yellow)}
.toolbar{display:flex;align-items:center;gap:6px;padding:6px 10px;background:var(--panel);border-bottom:1px solid var(--line);flex-wrap:wrap}
.toolbar .sep{width:1px;height:22px;background:var(--line);margin:0 4px}
.toolbar .title{font-weight:700;margin-right:6px}
.toolbar .mode{font-size:11.5px;font-weight:700;padding:2px 8px;border-radius:12px}
.toolbar .mode.view{background:var(--yellow-soft);color:var(--yellow)}.toolbar .mode.edit{background:var(--green-soft);color:var(--green)}
.tool{display:inline-flex;align-items:center;gap:5px;font-size:12px;padding:4px 8px;border:1px solid var(--line);border-radius:6px;
  background:var(--panel);cursor:pointer;color:var(--ink);font-weight:500}
.tool:hover{border-color:var(--accent)} .tool.on{background:var(--accent);color:#fff;border-color:var(--accent)}
.tool kbd{font-size:9.5px;padding:0 3px}
.panes{display:grid;grid-template-columns:var(--split,55%) 6px 1fr;min-height:0}
.pane{position:relative;overflow:auto;min-height:0;background:#e9edf3}
body.dark .pane{background:#0b1018}
.pane.right{background:#fff}
.divider{background:var(--line);cursor:col-resize}
.pagebox{position:relative;margin:14px auto;box-shadow:0 2px 10px rgba(0,0,0,.18);background:#fff;transform-origin:top center}
.pagebox img{display:block;width:100%;height:100%;user-select:none;pointer-events:none}
.pagebox svg{position:absolute;inset:0;width:100%;height:100%}
.ov rect.blk{fill:rgba(47,111,223,.06);stroke:rgba(47,111,223,.55);stroke-width:.7;cursor:pointer}
.ov rect.blk:hover{fill:rgba(47,111,223,.16)}
.ov rect.blk.sel{fill:rgba(47,111,223,.25);stroke:#2f6fdf;stroke-width:1.6}
.ov rect.blk.del{fill:rgba(210,63,63,.13);stroke:#d23f3f;stroke-dasharray:3 2}
.ov rect.blk.hid{fill:rgba(120,120,120,.06);stroke:rgba(120,120,120,.4);stroke-dasharray:2 2}
.ov rect.blk.h{stroke:#7a3fd2;fill:rgba(122,63,210,.07)}
.ov rect.blk.img{stroke:#1f9d55;fill:rgba(31,157,85,.07)}
.ov rect.blk.table{stroke:#d97706;fill:rgba(217,119,6,.07)}
.ov rect.blk.math{stroke:#c026d3;fill:rgba(192,38,211,.07)}
.ov rect.blk.list{stroke:#0e7490;fill:rgba(14,116,144,.07)}
.ov rect.blk.fr{stroke:#d23f3f;stroke-width:1.4}.ov rect.blk.fy{stroke:#e7a700;stroke-width:1.4}
.ov rect.blk.hl{fill:rgba(240,180,0,.25);stroke:#f0b400;stroke-width:1.6}
.ov .lbl{font:600 7px var(--font);fill:#fff;pointer-events:none}
.ov .lblbg{fill:#334;opacity:.85;pointer-events:none}
.ov .ordbg{fill:#2f6fdf}.ov .ordtx{font:700 7.5px var(--font);fill:#fff;pointer-events:none}
.ov line.gut{stroke:#d23f3f;stroke-width:1.6;stroke-dasharray:5 3;cursor:col-resize}
.ov .chain{font:700 9px var(--font);fill:#2f6fdf;pointer-events:none}
.ov rect.link{fill-opacity:.25;stroke-width:.8}
.ov rect.drag{fill:rgba(47,111,223,.12);stroke:#2f6fdf;stroke-dasharray:4 2}
.ov rect.zonebox{fill:none;stroke-width:1.2}
iframe.preview{border:0;width:100%;height:100%;display:block;background:#fff}
.drawer{display:grid;grid-template-columns:330px 1fr;height:var(--drawer,280px);border-top:1px solid var(--line);background:var(--panel);min-height:0}
.drawer.max{--drawer:62vh}
.drawer .side{border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.drawer .dtabs{display:flex;border-bottom:1px solid var(--line)}
.drawer .dtabs a{flex:1;text-align:center;padding:6px 4px;font-size:12px;font-weight:600;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent}
.drawer .dtabs a.on{color:var(--accent);border-color:var(--accent)}
.drawer .dbody{overflow:auto;flex:1;min-height:0}
.drawer .main{overflow:auto;min-height:0;padding:10px 14px}
.flag{padding:6px 10px;border-bottom:1px solid var(--line2);font-size:12.5px;cursor:pointer;display:flex;gap:7px}
.flag:hover{background:var(--accent-soft)} .flag.cur{background:var(--accent-soft);box-shadow:inset 3px 0 0 var(--accent)}
.flag .m{flex:1} .flag .pg{color:var(--muted);font-size:11px;white-space:nowrap}
.props{padding:10px;font-size:12.5px}.props dt{color:var(--muted);font-size:11px;font-weight:600;margin-top:6px}.props dd{margin:0}
.props .txt{max-height:110px;overflow:auto;background:var(--line2);padding:6px;border-radius:5px;font-size:12px}
.statusbar{display:flex;gap:14px;align-items:center;padding:3px 10px;font-size:11.5px;color:var(--muted);background:var(--panel);border-top:1px solid var(--line)}
.statusbar .job{color:var(--accent);font-weight:600}
.locked{padding:30px;text-align:center;color:var(--muted);font-size:15px}
.panel h3{margin-top:4px}
.panel table.t td,.panel table.t th{font-size:12.5px;padding:4px 7px}
.panel .sec{margin-bottom:16px}
.chk{display:flex;flex-direction:column;gap:3px;margin:6px 0}
.palette{position:fixed;inset:0;background:rgba(10,15,25,.45);z-index:200;display:flex;justify-content:center;padding-top:12vh}
.palette .box{background:var(--panel);width:560px;max-width:92vw;border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,.35);overflow:hidden;height:fit-content}
.palette input{border:0;border-bottom:1px solid var(--line);border-radius:0;padding:12px 14px;font-size:15px}
.palette .list{max-height:52vh;overflow:auto}
.palette .it{display:flex;justify-content:space-between;padding:7px 14px;cursor:pointer;font-size:13px}
.palette .it.on,.palette .it:hover{background:var(--accent-soft)}
.modal{position:fixed;inset:0;background:rgba(10,15,25,.45);z-index:210;display:flex;align-items:center;justify-content:center}
.modal .box{background:var(--panel);border-radius:10px;padding:18px 20px;width:520px;max-width:94vw;max-height:86vh;overflow:auto;box-shadow:0 10px 40px rgba(0,0,0,.35)}
.toast{position:fixed;right:16px;bottom:40px;z-index:300;display:flex;flex-direction:column;gap:6px}
.toast div{background:#1d2738;color:#fff;padding:9px 13px;border-radius:7px;font-size:13px;box-shadow:0 4px 14px rgba(0,0,0,.25);max-width:420px}
.toast div.err{background:#a52a2a}
.ctx{position:fixed;z-index:220;background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:0 6px 24px rgba(0,0,0,.2);
  min-width:220px;padding:4px 0;font-size:13px}
.ctx div{padding:5px 12px;cursor:pointer;display:flex;justify-content:space-between;gap:12px}.ctx div:hover{background:var(--accent-soft)}
.ctx hr{border:0;border-top:1px solid var(--line2);margin:3px 0}
.focus-mode .panes{grid-template-columns:1fr 0 0}.focus-mode .pane.right,.focus-mode .divider{display:none}
.inline-edit{position:absolute;z-index:40;background:var(--panel);border:2px solid var(--accent);border-radius:6px;padding:6px;box-shadow:0 6px 20px rgba(0,0,0,.25);width:320px}
.inline-edit textarea{min-height:60px;font-family:var(--font);font-size:13px}
.thumbs{display:flex;gap:6px;overflow-x:auto;padding:6px}
.thumbs a{flex:0 0 auto;text-align:center;font-size:10.5px;color:var(--muted)}
.thumbs img{height:90px;display:block;border:1px solid var(--line);background:#fff}
.thumbs a.on img{outline:2px solid var(--accent)}
.eqbox{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.eqbox .render{border:1px solid var(--line);border-radius:6px;padding:10px;min-height:60px;background:#fff;color:#111;font-size:18px}