diff --git a/padelnomics/src/padelnomics/planner/calculator.py b/padelnomics/src/padelnomics/planner/calculator.py
index e467ba1..44d2922 100644
--- a/padelnomics/src/padelnomics/planner/calculator.py
+++ b/padelnomics/src/padelnomics/planner/calculator.py
@@ -19,10 +19,10 @@ DEFAULTS = {
     "own": "rent",
     "dblCourts": 4,
     "sglCourts": 2,
-    "sqmPerDblHall": 330,
-    "sqmPerSglHall": 220,
-    "sqmPerDblOutdoor": 300,
-    "sqmPerSglOutdoor": 200,
+    "sqmPerDblHall": 336,
+    "sqmPerSglHall": 240,
+    "sqmPerDblOutdoor": 312,
+    "sqmPerSglOutdoor": 216,
     "ratePeak": 50,
     "rateOffPeak": 35,
     "rateSingle": 30,
diff --git a/padelnomics/src/padelnomics/static/css/planner.css b/padelnomics/src/padelnomics/static/css/planner.css
index 6d6a521..14494ba 100644
--- a/padelnomics/src/padelnomics/static/css/planner.css
+++ b/padelnomics/src/padelnomics/static/css/planner.css
@@ -279,6 +279,30 @@
   -moz-appearance: textfield;
 }
 
+/* ── Space reference facts ── */
+.space-facts {
+  margin-top: 10px;
+  padding: 10px 12px;
+  background: var(--card-bg);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  font-size: 11px;
+  color: var(--txt-3);
+}
+.space-facts__title {
+  font-weight: 600;
+  color: var(--txt-2);
+  margin-bottom: 6px;
+  font-size: 11px;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+.space-facts__item {
+  display: flex;
+  justify-content: space-between;
+  padding: 2px 0;
+}
+
 /* ── Toggle buttons ── */
 .toggle-group {
   display: flex;
diff --git a/padelnomics/src/padelnomics/static/js/planner.js b/padelnomics/src/padelnomics/static/js/planner.js
index c73cce3..af27f61 100644
--- a/padelnomics/src/padelnomics/static/js/planner.js
+++ b/padelnomics/src/padelnomics/static/js/planner.js
@@ -2,7 +2,7 @@
 const S = {
   venue:'indoor', own:'rent',
   dblCourts:4, sglCourts:2,
-  sqmPerDblHall:330, sqmPerSglHall:220, sqmPerDblOutdoor:300, sqmPerSglOutdoor:200,
+  sqmPerDblHall:336, sqmPerSglHall:240, sqmPerDblOutdoor:312, sqmPerSglOutdoor:216,
   ratePeak:50, rateOffPeak:35, rateSingle:30,
   peakPct:40, hoursPerDay:16, daysPerMonthIndoor:29, daysPerMonthOutdoor:25,
   bookingFee:10, utilTarget:40,
@@ -173,12 +173,19 @@ function rebuildSpaceInputs(){
   const isIn = S.venue==='indoor';
   let h = '';
   if(isIn){
-    h += slider('sqmPerDblHall','Hall m\u00B2 per Double Court',0,600,10,fN,'Total hall space needed per double court. Includes court (200m\u00B2), safety zones, circulation, and minimum clearances. Standard: 300\u2013350m\u00B2.')+
-         slider('sqmPerSglHall','Hall m\u00B2 per Single Court',0,400,10,fN,'Total hall space needed per single court. Includes court (120m\u00B2), safety zones, and access. Standard: 200\u2013250m\u00B2.');
+    h += slider('sqmPerDblHall','Hall m\u00B2 per Double Court',200,600,10,fN,'Total hall space needed per double court. Includes court (200m\u00B2), safety zones, circulation, and minimum clearances. Standard: 300\u2013350m\u00B2.')+
+         slider('sqmPerSglHall','Hall m\u00B2 per Single Court',120,400,10,fN,'Total hall space needed per single court. Includes court (120m\u00B2), safety zones, and access. Standard: 200\u2013250m\u00B2.');
   } else {
-    h += slider('sqmPerDblOutdoor','Land m\u00B2 per Double Court',0,500,10,fN,'Outdoor land area per double court. Includes court area, drainage slopes, access paths, and buffer zones. Standard: 280\u2013320m\u00B2.')+
-         slider('sqmPerSglOutdoor','Land m\u00B2 per Single Court',0,350,10,fN,'Outdoor land area per single court. Includes court, surrounding space, and access paths. Standard: 180\u2013220m\u00B2.');
+    h += slider('sqmPerDblOutdoor','Land m\u00B2 per Double Court',200,500,10,fN,'Outdoor land area per double court. Includes court area, drainage slopes, access paths, and buffer zones. Standard: 280\u2013320m\u00B2.')+
+         slider('sqmPerSglOutdoor','Land m\u00B2 per Single Court',120,350,10,fN,'Outdoor land area per single court. Includes court, surrounding space, and access paths. Standard: 180\u2013220m\u00B2.');
   }
+  h += '<div class="space-facts">';
+  h += '<div class="space-facts__title">Reference dimensions</div>';
+  h += '<div class="space-facts__item"><span>Double court playing area</span><span class="mono">20\u00D710m = 200 m\u00B2</span></div>';
+  h += '<div class="space-facts__item"><span>Single court playing area</span><span class="mono">20\u00D76m = 120 m\u00B2</span></div>';
+  h += '<div class="space-facts__item"><span>+ 2m buffer all around</span><span class="mono">24\u00D714m = 336 m\u00B2 / 24\u00D710m = 240 m\u00B2</span></div>';
+  h += '<div class="space-facts__item"><span>Min. ceiling height (indoor)</span><span class="mono">8\u201310m clear</span></div>';
+  h += '</div>';
   $('#inp-space').innerHTML = h;
 }
 
@@ -237,6 +244,10 @@ function buildToggle(id,opts,key){
   el.innerHTML = opts.map(o=>`<button data-val="${o.v}" class="toggle-btn ${S[key]===o.v?'toggle-btn--active':''}">${o.l}</button>`).join('');
   el.querySelectorAll('button').forEach(b=>b.onclick=()=>{
     S[key]=b.dataset.val;
+    // Update active state on all buttons in this toggle group
+    el.querySelectorAll('button').forEach(btn=>{
+      btn.classList.toggle('toggle-btn--active', btn.dataset.val===S[key]);
+    });
     rebuildSpaceInputs(); rebuildCapexInputs(); rebuildOpexInputs(); bindSliders(); render();
   });
 }
@@ -535,7 +546,7 @@ function renderChart(canvasId,type,data,opts={}){
   } else {
     defaults.scales = {
       x:{ticks:{color:'#94A3B8',font:{size:9,family:'Inter'}},grid:{display:false},border:{color:'#E2E8F0'}},
-      y:{ticks:{color:'#94A3B8',font:{size:9,family:'JetBrains Mono'}},grid:{color:'rgba(0,0,0,0.04)'},border:{color:'#E2E8F0'}},
+      y:{ticks:{color:'#94A3B8',font:{size:9,family:'Commit Mono'}},grid:{color:'rgba(0,0,0,0.04)'},border:{color:'#E2E8F0'}},
     };
   }
   charts[canvasId] = new Chart(ctx,{type,data,options:deepMerge(defaults,opts)});
diff --git a/padelnomics/tests/test_calculator.py b/padelnomics/tests/test_calculator.py
index 9ec9e85..a313997 100644
--- a/padelnomics/tests/test_calculator.py
+++ b/padelnomics/tests/test_calculator.py
@@ -179,7 +179,7 @@ class TestCalcDefaultScenario:
 
     def test_sqm_is_hall(self, d):
         # Indoor venue → sqm is hallSqm
-        expected = 4 * 330 + 2 * 220 + 200 + 6 * 20
+        expected = 4 * 336 + 2 * 240 + 200 + 6 * 20
         assert d["hallSqm"] == expected
         assert d["sqm"] == expected
 
@@ -377,7 +377,7 @@ class TestCalcOutdoorRent:
         return calc(default_state(venue="outdoor", own="rent"))
 
     def test_sqm_is_outdoor_land(self, d):
-        expected = 4 * 300 + 2 * 200 + 100
+        expected = 4 * 312 + 2 * 216 + 100
         assert d["outdoorLandSqm"] == expected
         assert d["sqm"] == expected
 
@@ -764,8 +764,8 @@ class TestCalcRegression:
         assert d["totalCourts"] == 6
 
     def test_hall_sqm(self, d):
-        # 4*330 + 2*220 + 200 + 6*20 = 2080
-        assert d["hallSqm"] == 2080
+        # 4*336 + 2*240 + 200 + 6*20 = 2144
+        assert d["hallSqm"] == 2144
 
     def test_opex_value(self, d):
         # Rent + Insurance + Electricity + Heating + Water + Maintenance +