/*==============================================
  ProActive Services — Stylesheet
  Palette: deep navy (#0A1930) / off-white (#F7F9FC)
  Accents: signal blue (#2F6FED) + mint (#00D4B5)
==============================================*/

/* ---------- Variables ---------- */
:root{
  --navy: #0A1930;
  --navy-deep: #061224;
  --navy-soft: #12213D;
  --surface: #F7F9FC;
  --surface-alt: #EEF2F9;
  --white: #FFFFFF;
  --text: #101828;
  --text-muted: #5B6478;
  --text-on-dark: #E7ECF6;
  --text-on-dark-muted: #93A0BE;
  --blue: #2F6FED;
  --blue-deep: #1E52C4;
  --mint: #00D4B5;
  --border: #E3E8F1;
  --border-dark: rgba(255,255,255,0.10);
  --shadow-sm: 0 2px 10px rgba(10,25,48,0.06);
  --shadow-md: 0 10px 30px rgba(10,25,48,0.10);
  --shadow-lg: 0 20px 50px rgba(10,25,48,0.18);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --mono: 'JetBrains Mono', 'SF Mono', 'Roboto Mono', Consolas, monospace;
  --ease: cubic-bezier(.4,0,.2,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after{ box-sizing: border-box; margin: 0; padding: 0; }
html{ scroll-behavior: smooth; }
body{
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img{ max-width: 100%; display: block; }
a{ text-decoration: none; color: inherit; }
ul{ list-style: none; }
button{ font-family: inherit; border: none; background: none; cursor: pointer; }
input, textarea{ font-family: inherit; }

h1, h2, h3, h4{
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text);
}

.container{
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding{ padding: 100px 0; }

.section-title{
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}
.section-title span{
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  background: rgba(47,111,237,0.08);
  border: 1px solid rgba(47,111,237,0.2);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.section-title h2{
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 14px;
}
.section-title p{ color: var(--text-muted); font-size: 16px; }

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}
.btn-primary{
  background: var(--blue);
  color: #fff;
  box-shadow: 0 8px 20px rgba(47,111,237,0.3);
}
.btn-primary:hover{
  background: var(--blue-deep);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(47,111,237,0.4);
}
.btn-outline{
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover{
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-2px);
}

/* ---------- Preloader ---------- */
.preloader{
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
}
.preloader.hidden{
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}
.loader{
  width: 46px;
  height: 46px;
  border: 3px solid rgba(255,255,255,0.15);
  border-top-color: var(--mint);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin{ to{ transform: rotate(360deg); } }

/* ---------- Header / Navbar ---------- */
#header{
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  background: rgba(10,25,48,0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-dark);
}
.navbar .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}
.logo{
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.01em;
}
.logo i{
  color: var(--mint);
  font-size: 22px;
}
.nav-links{
  display: flex;
  gap: 36px;
}
.nav-links a{
  font-size: 15px;
  font-weight: 500;
  color: var(--text-on-dark-muted);
  position: relative;
  transition: color 0.2s var(--ease);
}
.nav-links a::after{
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--mint);
  transition: width 0.25s var(--ease);
}
.nav-links a:hover{ color: var(--white); }
.nav-links a:hover::after{ width: 100%; }

.nav-actions{
  display: flex;
  align-items: center;
  gap: 20px;
}
.menu-toggle{
  display: none;
  color: var(--white);
  font-size: 20px;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero{
  position: relative;
  padding: 200px 0 120px;
  background: var(--navy);
  overflow: hidden;
}
.hero-bg{
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 400px at 85% 15%, rgba(0,212,181,0.16), transparent 60%),
    radial-gradient(700px 500px at 10% 90%, rgba(47,111,237,0.20), transparent 60%),
    linear-gradient(180deg, var(--navy-deep), var(--navy));
  z-index: 0;
}
.hero-grid{
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}
.hero-content .tag{
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mint);
  border: 1px solid rgba(0,212,181,0.35);
  background: rgba(0,212,181,0.08);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero-content h1{
  font-size: clamp(34px, 5vw, 54px);
  color: var(--white);
  margin-bottom: 22px;
}
.hero-content h1 span{
  display: block;
  background: linear-gradient(90deg, var(--mint), var(--blue) 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-content p{
  color: var(--text-on-dark-muted);
  font-size: 17px;
  max-width: 520px;
  margin-bottom: 36px;
}
.hero-buttons{
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}
.hero-buttons .btn-outline{
  color: var(--white);
  border-color: var(--border-dark);
}
.hero-buttons .btn-outline:hover{
  border-color: var(--mint);
  color: var(--mint);
}
.hero-features{
  display: flex;
  gap: 32px;
}
.feature{
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-on-dark);
  font-size: 14px;
  font-weight: 500;
}
.feature i{
  color: var(--mint);
  font-size: 18px;
}

/* Hero glass card */
.hero-image{ position: relative; z-index: 1; }
.glass-card{
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
}
.card-header{
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-on-dark);
  font-weight: 600;
  font-size: 14px;
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-dark);
}
.status{
  width: 9px;
  height: 9px;
  border-radius: 50%;
  position: relative;
}
.status.online{
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(0,212,181,0.2);
}
.status.online::after{
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--mint);
  animation: pulse 1.8s ease-out infinite;
}
@keyframes pulse{
  0%{ box-shadow: 0 0 0 0 rgba(0,212,181,0.5); }
  100%{ box-shadow: 0 0 0 10px rgba(0,212,181,0); }
}
.server{ display: flex; flex-direction: column; gap: 16px; }
.server-row{
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}
.server-row span{ color: var(--text-on-dark-muted); }
.server-row strong{ color: var(--white); font-weight: 600; }
.progress{
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 999px;
  overflow: hidden;
  margin-top: -6px;
}
.progress-bar{
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue), var(--mint));
}
.progress-bar.w95{ width: 95%; }
.progress-bar.w100{ width: 100%; }
.progress-bar.w92{ width: 92%; }

/* ---------- Quick Stats ---------- */
.stats{
  background: var(--white);
  border-bottom: 1px solid var(--border);
}
.stats .container{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 56px 24px;
}
.stat-card{
  text-align: center;
  padding: 0 20px;
  border-right: 1px solid var(--border);
}
.stat-card:last-child{ border-right: none; }
.stat-card h2, .stat-card .counter{
  font-family: var(--mono);
  font-size: 38px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}
.stat-card p{
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
}

/* ---------- Services ---------- */
.services-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card{
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  transition: all 0.3s var(--ease);
}
.service-card:hover{
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(47,111,237,0.3);
}
.service-card .icon{
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgba(47,111,237,0.08);
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 22px;
}
.service-card h3{ font-size: 20px; margin-bottom: 12px; }
.service-card p{
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 18px;
}
.service-card a{
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
}
.service-card a:hover{ text-decoration: underline; }

/* ---------- About ---------- */
.about-grid{
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 70px;
  align-items: center;
}
.about-image img{
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.about-content > span{
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 14px;
  display: inline-block;
}
.about-content h2{
  font-size: clamp(26px, 3.5vw, 34px);
  margin-bottom: 18px;
}
.about-content p{
  color: var(--text-muted);
  margin-bottom: 16px;
}
.about-features{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 28px 0 32px;
}
.about-item{
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
}
.about-item i{ color: var(--mint); font-size: 16px; }

/* ---------- Mission ---------- */
.mission{ background: var(--surface-alt); }
.mission-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.mission-card{
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.mission-card i{
  font-size: 28px;
  color: var(--blue);
  margin-bottom: 20px;
}
.mission-card h3{ font-size: 19px; margin-bottom: 12px; }
.mission-card p{ color: var(--text-muted); font-size: 15px; }

/* ---------- Why Choose Us ---------- */
.why-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  background: var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.why-card{
  background: var(--white);
  padding: 40px 32px;
  transition: background 0.25s var(--ease);
}
.why-card:hover{ background: var(--surface-alt); }
.why-card i{
  font-size: 24px;
  color: var(--blue);
  margin-bottom: 18px;
}
.why-card h3{ font-size: 18px; margin-bottom: 10px; }
.why-card p{ color: var(--text-muted); font-size: 14.5px; }

/* ---------- Process / Timeline ---------- */
.timeline{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  position: relative;
}
.timeline-item{
  position: relative;
  padding: 32px 24px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.timeline-item .step{
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--blue);
  background: rgba(47,111,237,0.08);
  padding: 4px 12px;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 18px;
}
.timeline-item h3{ font-size: 18px; margin-bottom: 10px; }
.timeline-item p{ color: var(--text-muted); font-size: 14.5px; }

/* ---------- Technologies ---------- */
.technologies{ background: var(--surface-alt); }
.tech-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.tech-item{
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 26px 16px;
  text-align: center;
  transition: all 0.25s var(--ease);
}
.tech-item:hover{
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(47,111,237,0.3);
}
.tech-item i{
  font-size: 30px;
  color: var(--blue);
  display: block;
  margin-bottom: 12px;
}
.tech-item span{ font-size: 14px; font-weight: 500; color: var(--text-muted); }

/* ---------- Business Stats ---------- */
.business-stats{
  background: var(--navy);
  padding: 80px 0;
}
.stats-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-box h2, .stat-box .counter{
  font-family: var(--mono);
  font-size: 42px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
.stat-box p{ color: var(--text-on-dark-muted); font-size: 14px; font-weight: 500; }

/* ---------- CTA ---------- */
.cta{
  background: linear-gradient(120deg, var(--blue-deep), var(--blue) 60%, var(--mint) 130%);
  padding: 90px 0;
}
.cta-content{
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.cta-content h2{
  color: var(--white);
  font-size: clamp(26px, 3.6vw, 36px);
  margin-bottom: 16px;
}
.cta-content p{
  color: rgba(255,255,255,0.88);
  margin-bottom: 30px;
}
.cta-content .btn-primary{
  background: var(--white);
  color: var(--blue-deep);
  box-shadow: 0 10px 26px rgba(6,18,36,0.25);
}
.cta-content .btn-primary:hover{
  background: var(--navy);
  color: var(--white);
}

/* ---------- Portfolio ---------- */
.portfolio-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.portfolio-card{
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s var(--ease);
}
.portfolio-card:hover{
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.portfolio-card img{
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.portfolio-content{ padding: 26px; }
.portfolio-content span{
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--blue);
}
.portfolio-content h3{
  font-size: 19px;
  margin: 10px 0 12px;
}
.portfolio-content p{
  color: var(--text-muted);
  font-size: 14.5px;
  margin-bottom: 16px;
}
.portfolio-content a{
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
}
.portfolio-content a:hover{ color: var(--blue); }

/* ---------- Case Studies ---------- */
.case-studies{ background: var(--navy); }
.case-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.case-card{
  text-align: center;
  padding: 40px 20px;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
}
.case-card h3{
  font-family: var(--mono);
  font-size: 44px;
  color: var(--mint);
  margin-bottom: 10px;
}
.case-card p{ color: var(--text-on-dark-muted); font-size: 15px; }

/* ---------- Testimonials ---------- */
.testimonial-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.testimonial-card{
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 34px;
}
.testimonial-card .quote{
  font-size: 24px;
  color: rgba(47,111,237,0.25);
  margin-bottom: 18px;
}
.testimonial-card p{
  color: var(--text);
  font-size: 15.5px;
  margin-bottom: 24px;
}
.client{
  display: flex;
  align-items: center;
  gap: 14px;
}
.client img{
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}
.client h4{ font-size: 15px; margin-bottom: 2px; }
.client span{ font-size: 13px; color: var(--text-muted); }

/* ---------- Clients ---------- */
.clients{ background: var(--surface-alt); }
.clients-grid{
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}
.client-logo{
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s var(--ease);
}
.client-logo i{
  font-size: 30px;
  color: var(--text-muted);
  transition: color 0.25s var(--ease);
}
.client-logo:hover{ border-color: var(--blue); }
.client-logo:hover i{ color: var(--blue); }

/* ---------- FAQ ---------- */
.faq-list{
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item{
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
}
.faq-question{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  color: var(--text);
}
.faq-question i{
  color: var(--blue);
  font-size: 14px;
  transition: transform 0.25s var(--ease);
}
.faq-item.active .faq-question i{ transform: rotate(45deg); }
.faq-answer{
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s var(--ease);
}
.faq-item.active .faq-answer{ max-height: 240px; }
.faq-answer p{
  padding: 0 26px 22px;
  color: var(--text-muted);
  font-size: 15px;
}

/* ---------- Contact ---------- */
.contact-grid{
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 50px;
}
.contact-info{
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.info-card{
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
}
.info-card i{
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: rgba(47,111,237,0.08);
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
}
.info-card h4{ font-size: 15px; margin-bottom: 4px; }
.info-card p{ font-size: 14.5px; color: var(--text-muted); }

.contact-form{
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}
.form-group{ margin-bottom: 18px; }
.form-group input,
.form-group textarea{
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder{ color: #97A1B5; }
.form-group input:focus,
.form-group textarea:focus{
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(47,111,237,0.15);
  background: var(--white);
}
.contact-form .btn-primary{
  width: 100%;
  padding: 15px;
}

/* ---------- Map ---------- */
.map{
  width: 100%;
  height: 420px;
  line-height: 0;
}
.map iframe{
  width: 100%;
  height: 100%;
  border: 0;
  filter: grayscale(0.3) contrast(1.05);
}

/* ---------- Footer ---------- */
.footer{
  background: var(--navy-deep);
  color: var(--text-on-dark-muted);
  padding: 80px 0 0;
}
.footer-grid{
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--border-dark);
}
.footer-column h3{
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-size: 19px;
  margin-bottom: 16px;
}
.footer-column h3 i{ color: var(--mint); }
.footer-column h4{
  color: var(--white);
  font-size: 15px;
  margin-bottom: 20px;
}
.footer-column p{ font-size: 14.5px; line-height: 1.7; }
.footer-column ul{ display: flex; flex-direction: column; gap: 12px; }
.footer-column ul li a,
.footer-column ul li{ font-size: 14.5px; transition: color 0.2s var(--ease); }
.footer-column ul li a:hover{ color: var(--mint); }
.social-links{ display: flex; gap: 12px; }
.social-links a{
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-on-dark);
  transition: all 0.25s var(--ease);
}
.social-links a:hover{
  background: var(--mint);
  color: var(--navy-deep);
  border-color: var(--mint);
  transform: translateY(-3px);
}
.footer-bottom{
  text-align: center;
  padding: 26px 0;
  font-size: 13.5px;
}

/* ---------- Floating Buttons ---------- */
.back-to-top,
.whatsapp-btn{
  position: fixed;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  z-index: 500;
  box-shadow: var(--shadow-md);
  transition: transform 0.25s var(--ease);
}
.back-to-top{
  bottom: 90px;
  background: var(--navy);
  color: var(--white);
}
.whatsapp-btn{
  bottom: 28px;
  background: #25D366;
  color: var(--white);
}
.back-to-top:hover,
.whatsapp-btn:hover{ transform: translateY(-4px); }

/* ==============================================
   RESPONSIVE
============================================== */
@media (max-width: 1080px){
  .services-grid,
  .mission-grid,
  .why-grid,
  .timeline,
  .portfolio-grid,
  .case-grid,
  .testimonial-grid{
    grid-template-columns: repeat(2, 1fr);
  }
  .tech-grid{ grid-template-columns: repeat(3, 1fr); }
  .clients-grid{ grid-template-columns: repeat(4, 1fr); }
  .stats-grid{ grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .hero-grid{ gap: 40px; }
}

@media (max-width: 900px){
  .nav-links{ display: none; }
  .menu-toggle{ display: flex; }
  .hero-grid,
  .about-grid,
  .contact-grid{
    grid-template-columns: 1fr;
  }
  .about-image{ order: 2; }
  .about-content{ order: 1; }
  .hero{ padding: 150px 0 80px; text-align: left; }
  .stats .container{ grid-template-columns: repeat(2, 1fr); }
  .stat-card{
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 24px;
    margin-bottom: 24px;
  }
}

@media (max-width: 640px){
  .section-padding{ padding: 70px 0; }
  .services-grid,
  .mission-grid,
  .why-grid,
  .timeline,
  .portfolio-grid,
  .case-grid,
  .testimonial-grid,
  .tech-grid,
  .stats-grid,
  .footer-grid{
    grid-template-columns: 1fr;
  }
  .clients-grid{ grid-template-columns: repeat(2, 1fr); }
  .hero-buttons{ flex-direction: column; }
  .hero-buttons .btn{ width: 100%; }
  .hero-features{ flex-wrap: wrap; gap: 20px; }
  .about-features{ grid-template-columns: 1fr; }
  .back-to-top, .whatsapp-btn{ right: 18px; width: 44px; height: 44px; }
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}