:root{
  --g-blue:#1a73e8; --g-blue-d:#1558b0; --g-red:#d93025; --g-yellow:#f9ab00; --g-green:#0f9d58;
  --ink:#202124; --mute:#5f6368; --line:#dadce0; --bg:#f1f3f4; --card:#fff;
  --signal:#0f9d58; --signal-bg:#e6f4ea; --ns:#f1f3f4; --ns-fg:#80868b;
  --radius:12px; --shadow:0 1px 2px rgba(60,64,67,.1),0 1px 3px rgba(60,64,67,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:'Inter',Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:14px;line-height:1.55}
button,select,input{font-family:inherit;font-size:14px}
h2{font-family:'Google Sans','Inter',sans-serif;font-weight:500;margin:0;font-size:22px;letter-spacing:-.2px}
.muted{color:var(--mute);margin:4px 0 0;font-size:13px}
.mono{font-family:'Roboto Mono',monospace}

/* ---------- brand wordmark ---------- */
.brand{font-family:'Google Sans','Inter',sans-serif;font-weight:700;font-size:22px;letter-spacing:-.5px;display:flex;align-items:center}
.g-G{color:var(--g-blue)} .g-S{color:var(--g-red)} .g-I{color:var(--g-yellow)} .g-Q{color:var(--g-green)}
.brand-tag{font-family:'Inter';font-weight:500;font-size:12px;color:var(--mute);margin-left:8px;letter-spacing:.5px;text-transform:uppercase}

/* ---------- login ---------- */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:radial-gradient(1200px 600px at 50% -10%,#e8f0fe,#f1f3f4)}
.login-card{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:40px 38px;width:360px;text-align:center}
.login-brand{font-family:'Google Sans';font-weight:700;font-size:42px;letter-spacing:-1px}
.login-sub{color:var(--mute);font-size:13px;margin:6px 0 22px}
.login-card form{text-align:left}
.login-card label{display:block;font-size:12px;color:var(--mute);margin:14px 0 5px;font-weight:500}
.login-card input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:8px;outline:none;transition:.15s}
.login-card input:focus{border-color:var(--g-blue);box-shadow:0 0 0 3px rgba(26,115,232,.15)}
.login-card button{width:100%;margin-top:22px;background:var(--g-blue);color:#fff;border:0;padding:12px;border-radius:8px;font-weight:600;cursor:pointer;transition:.15s}
.login-card button:hover{background:var(--g-blue-d)}
.login-err{background:#fce8e6;color:#c5221f;border-radius:8px;padding:9px 12px;font-size:13px;margin-bottom:6px}
.login-foot{margin-top:22px;font-size:11px;color:var(--mute)}

/* ---------- top bar ---------- */
.topbar{height:60px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:24px;padding:0 22px;position:sticky;top:0;z-index:30}
.study-switch{display:flex;gap:6px;background:var(--bg);padding:4px;border-radius:10px}
.seg{border:0;background:transparent;color:var(--mute);padding:7px 14px;border-radius:8px;cursor:pointer;font-weight:500;font-size:13px;white-space:nowrap}
.seg.active{background:#fff;color:var(--g-blue);box-shadow:var(--shadow)}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:16px}
.who{font-size:13px;color:var(--mute)}
.logout{color:var(--g-blue);text-decoration:none;font-weight:500;font-size:13px}
.logout:hover{text-decoration:underline}

/* ---------- shell ---------- */
.shell{display:flex;align-items:flex-start;gap:0}
.rail{width:248px;min-width:248px;background:#fff;border-right:1px solid var(--line);min-height:calc(100vh - 60px);padding:18px 16px;position:sticky;top:60px}
.rail-head{font-family:'Google Sans';font-weight:500;font-size:15px;margin-bottom:4px}
.rail-meta{font-size:12px;color:var(--mute);margin-bottom:14px}
.filter-group{margin-bottom:14px}
.filter-group .fg-label{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--mute);font-weight:600;margin-bottom:6px}
.chk{display:flex;align-items:center;gap:8px;padding:3px 0;font-size:13px;cursor:pointer}
.chk input{accent-color:var(--g-blue);width:15px;height:15px}
.apply{width:100%;background:var(--g-blue);color:#fff;border:0;border-radius:8px;padding:10px;font-weight:600;cursor:pointer;margin-top:6px}
.apply:hover{background:var(--g-blue-d)}
.reset{width:100%;background:#fff;color:var(--mute);border:1px solid var(--line);border-radius:8px;padding:9px;cursor:pointer;margin-top:8px}
.rail-foot{margin-top:22px;font-size:11px;color:var(--mute);line-height:1.6}

/* ---------- main ---------- */
.main{flex:1;padding:22px 26px;min-width:0}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:20px}
.tab{border:0;background:transparent;padding:11px 16px;color:var(--mute);font-weight:500;cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-1px}
.tab.active{color:var(--g-blue);border-bottom-color:var(--g-blue)}
.panel{display:none;animation:fade .25s ease}
.panel.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.panel-title{margin-bottom:16px}

/* ---------- tiles ---------- */
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px;margin-bottom:18px}
.tile{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
.tile .t-label{font-size:12px;color:var(--mute);min-height:30px;font-weight:500}
.tile .t-big{font-family:'Roboto Mono';font-weight:700;font-size:32px;line-height:1.1;margin:6px 0 2px;color:var(--signal)}
.tile .t-big.down{color:var(--g-red)}
.tile .t-ce{font-family:'Roboto Mono';font-size:13px;color:var(--ink)}
.tile.primary{outline:2px solid var(--g-blue);outline-offset:-2px}
.chip{display:inline-block;font-family:'Roboto Mono';font-size:11px;font-weight:700;padding:2px 8px;border-radius:20px;margin-left:6px}
.chip.sig{background:var(--signal-bg);color:#0b8043}
.chip.ns{background:var(--ns);color:var(--ns-fg)}

/* ---------- cards ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:18px;overflow:hidden}
.card-h{font-family:'Google Sans';font-weight:500;font-size:15px;padding:14px 18px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px}
.card-h .hint{font-family:'Inter';font-weight:400;font-size:12px;color:var(--mute);margin-left:auto}
.chart-wrap{padding:16px 18px;height:340px;position:relative}

/* ---------- builder ---------- */
.builder{display:flex;gap:14px;align-items:flex-end;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);margin-bottom:18px}
.field{display:flex;flex-direction:column;gap:5px}
.field label{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--mute);font-weight:600}
.field select{padding:9px 11px;border:1px solid var(--line);border-radius:8px;min-width:230px;background:#fff;cursor:pointer}
.field select:focus{outline:none;border-color:var(--g-blue);box-shadow:0 0 0 3px rgba(26,115,232,.12)}
.run{background:var(--g-blue);color:#fff;border:0;border-radius:8px;padding:10px 20px;font-weight:600;cursor:pointer;height:39px}
.run:hover{background:var(--g-blue-d)}

/* ---------- lift banner ---------- */
.lift-banner{display:flex;gap:24px;align-items:center;background:linear-gradient(90deg,#e8f0fe,#fff);border:1px solid var(--line);border-left:4px solid var(--g-blue);border-radius:var(--radius);padding:16px 20px;margin-bottom:18px}
.lift-banner .lb-big{font-family:'Roboto Mono';font-weight:700;font-size:30px;color:var(--signal)}
.lift-banner .lb-big.down{color:var(--g-red)}
.lift-banner .lb-meta{font-size:13px;color:var(--mute)}
.lift-banner .lb-meta b{color:var(--ink)}

/* ---------- tables ---------- */
.tbl-wrap{overflow-x:auto;padding:6px 0}
table.gx{width:100%;border-collapse:collapse;font-size:13px}
table.gx th,table.gx td{padding:9px 14px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
table.gx th{font-size:11px;text-transform:uppercase;letter-spacing:.4px;color:var(--mute);font-weight:600;background:#fafafa;position:sticky;top:0}
table.gx td:first-child,table.gx th:first-child{text-align:left}
table.gx tr:hover td{background:#f8fbff}
table.gx td.num,table.gx th.num{font-family:'Roboto Mono'}
table.gx .delta{font-family:'Roboto Mono';font-weight:700}
table.gx .delta.up{color:var(--signal)} table.gx .delta.down{color:var(--g-red)}
table.gx tr.tot td{font-weight:700;background:#f6f8fa;border-top:2px solid var(--ink)}
.stats-row{display:flex;gap:30px;flex-wrap:wrap;padding:16px 18px}
.stats-row .s b{font-family:'Roboto Mono';font-size:20px;display:block;color:var(--ink)}
.stats-row .s span{font-size:12px;color:var(--mute)}

/* ---------- loading ---------- */
.loading{position:fixed;inset:0;background:rgba(255,255,255,.55);display:none;align-items:center;justify-content:center;z-index:50}
.loading.on{display:flex}
.spin{width:34px;height:34px;border:3px solid #dbe1e8;border-top-color:var(--g-blue);border-radius:50%;animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

@media(max-width:900px){.rail{display:none}.study-switch{overflow:auto}}
.login-brand .gsiq-logo{height:52px;width:auto;display:inline-block}
.brand .gsiq-logo{height:30px;width:auto;display:inline-block;margin-right:6px}
.login-brand .gsiq-logo{height:26px}
.brand .gsiq-logo{height:15px}