fixed start page and scroll in modal window

src/styles/NakhodkaLanding.css

@@ -2,8 +2,8 @@
 
 .nk-page {
   font-family: 'Inter', sans-serif;
-  background: linear-gradient(180deg, #ffffff 0%, #fafafa 100%);
-  color: #262626;
+  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-app) 100%);
+  color: var(--text-primary);
   min-height: 100vh;
 }
 
@@ -71,10 +71,10 @@
 .nk-grid {
   position: absolute;
   inset: 0;
-  background-image: radial-gradient(rgba(38, 38, 38, 0.10) 1px, transparent 1px);
+  background-image: radial-gradient(var(--text-primary) 1px, transparent 1px);
   background-size: 26px 26px;
   animation: drift 14s linear infinite;
-  opacity: 0.5;
+  opacity: 0.1;
 }
 
 .nk-glow {
@@ -100,7 +100,7 @@
   font-size: 22px;
   font-weight: 600;
   letter-spacing: 0.01em;
-  color: #262626;
+  color: var(--text-primary);
 }
 
 .nk-nav-right {
@@ -109,10 +109,11 @@
   gap: 10px;
 }
 
-.nk-lang-btn {
-  background: #ffffff;
-  border: 1px solid #dbdbdb;
-  color: #262626;
+.nk-lang-btn,
+.nk-theme-btn {
+  background: var(--bg-card);
+  border: 1px solid var(--border);
+  color: var(--text-primary);
   padding: 9px 12px;
   border-radius: 999px;
   font-size: 12px;
@@ -124,8 +125,13 @@
   transition: background 0.2s;
 }
 
-.nk-lang-btn:hover {
-  background: #f0f0f0;
+.nk-theme-btn {
+  padding: 9px;
+}
+
+.nk-lang-btn:hover,
+.nk-theme-btn:hover {
+  background: var(--hover-bg);
 }
 
 .nk-nav-btn {
@@ -194,16 +200,17 @@
   position: relative;
   z-index: 2;
   max-width: 620px;
-  margin-top: 90px;
+  margin-top: 40px;
   animation: riseIn 0.8s ease both;
 }
 
 .nk-eyebrow {
   display: inline-block;
-  font-size: 13px;
-  color: #737373;
+  font-size: 20px;
+  text-align: center;
+  color: var(--muted);
   letter-spacing: 0.04em;
-  margin-bottom: 18px;
+  margin-bottom: 30px;
   text-transform: uppercase;
   font-weight: 600;
 }
@@ -211,10 +218,10 @@
 .nk-h1 {
   font-family: 'Fraunces', serif;
   font-weight: 600;
-  font-size: clamp(34px, 5.2vw, 58px);
+  font-size: clamp(30px, 6.76vw, 75px);
   line-height: 1.08;
   margin: 0 0 22px;
-  color: #262626;
+  color: var(--text-primary);
 }
 
 .nk-accent {
@@ -227,7 +234,7 @@
 .nk-lead {
   font-size: 17px;
   line-height: 1.6;
-  color: #737373;
+  color: var(--muted);
   max-width: 500px;
   margin-bottom: 34px;
 }
@@ -259,11 +266,12 @@
 
 .nk-cta-hint {
   font-size: 13px;
-  color: #737373;
+  color: var(--muted);
 }
 
 .nk-steps-section {
   padding: 0 6vw 60px;
+  margin-top: -60px;
 }
 
 .nk-h2 {
@@ -272,7 +280,7 @@
   font-weight: 600;
   margin-bottom: 42px;
   text-align: center;
-  color: #262626;
+  color: var(--text-primary);
 }
 
 .nk-steps-grid {
@@ -284,22 +292,22 @@
 }
 
 .nk-step-card {
-  background: #ffffff;
-  border: 1px solid #dbdbdb;
+  background: var(--bg-card);
+  border: 1px solid var(--border);
   border-radius: 20px;
   padding: 26px 24px;
   transition: border-color 0.2s, box-shadow 0.2s;
 }
 
 .nk-step-card:hover {
-  border-color: rgba(0, 149, 246, 0.4);
+  border-color: rgba(var(--teal-rgb), 0.4);
   box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
 }
 
 .nk-step-num {
   font-family: 'Fraunces', serif;
   font-size: 15px;
-  color: #0095f6;
+  color: var(--teal);
   font-weight: 600;
 }
 
@@ -307,13 +315,13 @@
   font-size: 18px;
   font-weight: 600;
   margin: 12px 0 8px;
-  color: #262626;
+  color: var(--text-primary);
 }
 
 .nk-step-text {
   font-size: 14.5px;
   line-height: 1.55;
-  color: #737373;
+  color: var(--muted);
 }
 
 .nk-final-cta {
@@ -327,7 +335,7 @@
   text-align: center;
   padding: 24px 0 34px;
   font-size: 13px;
-  color: #b0b0b0;
+  color: var(--muted2);
 }
 
 @media (max-width: 768px) {