*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Manrope', system-ui, sans-serif;
  color: #1D1D1B;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

button {
  font-family: inherit;
}

@keyframes rsFade {
  from { opacity: 0; transform: scale(1.015); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes rsUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =====================================================
   MOBILE NAV
   ===================================================== */

.rs-nav-desktop {
  display: flex;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}

.rs-nav-burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  flex-shrink: 0;
}

.rs-burger-line {
  display: block;
  width: 22px;
  height: 2.5px;
  background: #1D1D1B;
  border-radius: 2px;
  transition: background 0.15s;
}

.rs-nav-mobile {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid #E8ECEC;
  box-shadow: 0 8px 28px -8px rgba(29,29,27,0.16);
  padding: 8px 24px 22px;
  flex-direction: column;
  z-index: 40;
}

.rs-nav-mobile-btn {
  background: none;
  border: none;
  border-bottom: 1px solid #F0F2F2;
  cursor: pointer;
  font-family: 'Manrope', system-ui, sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: #3A403E;
  padding: 14px 0;
  text-align: left;
  width: 100%;
}

.rs-nav-mobile-btn:last-of-type {
  border-bottom: none;
}

.rs-nav-mobile-phone {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  padding: 12px 18px;
  background: #EAF7F8;
  color: #1B7F85;
  border-radius: 10px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
}

/* =====================================================
   RESPONSIVE GRID CLASSES
   ===================================================== */

.rs-hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 1fr;
  gap: 52px;
  align-items: center;
}

.rs-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.rs-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.rs-grid-2-prod {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.rs-about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 52px;
  align-items: start;
}

.rs-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 52px;
  align-items: start;
}

.rs-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.3fr;
  gap: 40px;
}

.rs-proc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.rs-comp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.rs-a2600-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.rs-form-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 18px;
}

/* =====================================================
   BREAKPOINT: TABLET  ≤ 900px
   ===================================================== */

@media (max-width: 900px) {
  .rs-nav-desktop { display: none !important; }
  .rs-phone-btn   { display: none !important; }
  .rs-nav-burger  { display: flex !important; }

  .rs-hero-grid    { grid-template-columns: 1fr !important; }
  .rs-about-grid   { grid-template-columns: 1fr !important; }
  .rs-contact-grid { grid-template-columns: 1fr !important; }
  .rs-a2600-hero   { grid-template-columns: 1fr !important; }
  .rs-comp-grid    { grid-template-columns: 1fr 1fr !important; }
  .rs-proc-grid    { grid-template-columns: repeat(2, 1fr) !important; }
  .rs-grid-4       { grid-template-columns: repeat(2, 1fr) !important; }
}

/* =====================================================
   BREAKPOINT: PHABLET  ≤ 720px
   ===================================================== */

@media (max-width: 720px) {
  .rs-footer-grid { grid-template-columns: 1fr !important; gap: 32px !important; }
  .rs-grid-3      { grid-template-columns: repeat(2, 1fr) !important; }
  .rs-comp-grid   { grid-template-columns: 1fr !important; }
}

/* =====================================================
   BREAKPOINT: MOBILE  ≤ 600px
   ===================================================== */

@media (max-width: 600px) {
  /* grids */
  .rs-hero-grid   { gap: 28px !important; }
  .rs-grid-3      { grid-template-columns: 1fr !important; }
  .rs-grid-4      { grid-template-columns: 1fr 1fr !important; gap: 12px !important; }
  .rs-grid-2-prod { grid-template-columns: 1fr !important; gap: 24px !important; }
  .rs-proc-grid   { grid-template-columns: 1fr !important; }
  .rs-form-2col   { grid-template-columns: 1fr !important; }
  .rs-a2600-hero  { gap: 24px !important; }

  /* sticky image in product-generic — remove sticky on mobile */
  .rs-grid-2-prod > :first-child {
    position: static !important;
  }

  /* carousel shrink */
  .rs-carousel-track { height: 260px !important; }
  .rs-slide           { height: 260px !important; }

  /* dense padding on dark bands */
  .rs-cta-inner  { padding: 32px 20px !important; }
  .rs-proc-inner { padding: 32px 20px !important; }
}

/* =====================================================
   BREAKPOINT: SMALL MOBILE  ≤ 400px
   ===================================================== */

@media (max-width: 400px) {
  .rs-grid-4 { grid-template-columns: 1fr !important; }
}