/* ==========================================================================
   XpertBrain Technologies - Mobile-First Responsive Design System
   Breakpoints:
   - Mobile Base: 320px - 575px
   - Phablets / Small Tablets: 576px - 767px
   - Tablets (Portrait): 768px - 991px
   - Laptops & Desktops: 992px - 1439px
   - Ultra-Wide & 4K TVs: 1440px - 2560px+
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Poppins:wght@600;700;800&display=swap');

:root {
  /* Brand Colors */
  --primary-blue: #0B2C7D;
  --primary-blue-hover: #08215E;
  --primary-blue-light: rgba(11, 44, 125, 0.06);

  --brand-orange: #FF6A00;
  --brand-orange-hover: #E65C00;
  --brand-orange-light: rgba(255, 106, 0, 0.08);

  --accent-blue: #2563EB;
  --accent-blue-hover: #1D4ED8;

  /* Status Colors */
  --status-success: #16A34A;
  --status-warning: #F59E0B;
  --status-error: #DC2626;

  /* Neutral Colors */
  --bg-main: #F8FAFC;
  --bg-white: #FFFFFF;
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --border-color: #E5E7EB;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Border Radii */
  --radius-btn: 12px;
  --radius-card: 16px;
  --radius-input: 10px;
  --radius-modal: 20px;
  --radius-img: 16px;

  /* Shadows */
  --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-btn-orange: 0 6px 18px rgba(255, 106, 0, 0.25);
  --shadow-btn-blue: 0 6px 18px rgba(11, 44, 125, 0.2);
  --shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.12);

  /* Spacing Grid (8pt System) */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* -------------------------------------------------------------------------- */
/* 1. Base Mobile-First Styles (Default 320px+)                               */
/* -------------------------------------------------------------------------- */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--primary-blue);
  line-height: 1.25;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul { list-style: none; }
img, svg { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: var(--font-body); }

/* Responsive Container */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-2);
}

/* Utilities */
.text-orange { color: var(--brand-orange) !important; }
.text-blue { color: var(--primary-blue) !important; }
.text-muted { color: var(--text-secondary) !important; }

/* Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  min-height: 48px; /* Accessible Touch Target */
  width: 100%;
  text-align: center;
  white-space: nowrap;
}
.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background-color: var(--brand-orange);
  color: var(--bg-white);
  box-shadow: var(--shadow-btn-orange);
}
.btn-primary:hover {
  background-color: var(--brand-orange-hover);
}

.btn-secondary {
  background-color: var(--bg-white);
  color: var(--primary-blue);
  border-color: var(--primary-blue);
}
.btn-secondary:hover {
  background-color: var(--primary-blue-light);
}

.btn-dark-blue {
  background-color: var(--primary-blue);
  color: var(--bg-white);
  box-shadow: var(--shadow-btn-blue);
}
.btn-dark-blue:hover {
  background-color: var(--primary-blue-hover);
}

.btn-whatsapp {
  background-color: #25D366;
  color: var(--bg-white);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto var(--space-4) auto;
}
.section-header .subline {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-orange);
  margin-bottom: 6px;
  display: inline-block;
}
.section-header h2 {
  font-size: clamp(1.6rem, 4.5vw, 2.5rem);
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: var(--space-1);
}
.section-header p {
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  color: var(--text-secondary);
}

/* Announcement Top Bar */
.announcement-bar {
  background-color: var(--primary-blue);
  color: var(--bg-white);
  padding: 10px 0;
  font-size: 0.825rem;
}
.announcement-flex {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
}

/* Navbar Header */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand-logo-wrap img {
  height: 38px;
  width: auto;
}

/* Mobile Navigation Menu Drawer (<992px) */
.nav-links {
  display: none;
  flex-direction: column;
  position: absolute;
  top: 68px;
  left: 0;
  width: 100%;
  background-color: var(--bg-white);
  padding: var(--space-3);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.12);
  border-bottom: 1px solid var(--border-color);
  gap: var(--space-2);
  z-index: 1001;
}
.nav-links.active {
  display: flex;
}
.nav-link {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}
.nav-link:last-child {
  border-bottom: none;
}
.nav-link:hover, .nav-link.active {
  color: var(--brand-orange);
}

.mobile-toggle {
  display: block;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary-blue);
  cursor: pointer;
  padding: 6px;
}
.nav-cta-desktop {
  display: none !important;
}
.mobile-menu-ctas {
  display: flex !important;
}

/* Hero Section */
.hero-section {
  padding: var(--space-4) 0;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background-color: var(--brand-orange-light);
  color: var(--brand-orange);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
  border: 1px solid rgba(255, 106, 0, 0.2);
}
.hero-title {
  font-size: clamp(1.85rem, 5vw, 3.25rem);
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}
.hero-desc {
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}
.hero-cta-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: var(--space-3);
}
.hero-trust-proof {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
}

/* Hero Device Mockups */
.mockup-container {
  position: relative;
  width: 100%;
  max-width: 580px;
  margin: 0 auto;
}
.laptop-frame {
  background-color: var(--primary-blue);
  border-radius: var(--radius-img);
  padding: 8px;
  box-shadow: var(--shadow-lg);
  border: 2px solid #1E3A8A;
}
.laptop-topbar {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 6px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot-red { background-color: #EF4444; }
.dot-yellow { background-color: #F59E0B; }
.dot-green { background-color: #10B981; }

.laptop-inner {
  background-color: #FFFFFF;
  border-radius: 6px;
  padding: var(--space-2);
  color: var(--text-primary);
}
.dash-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 8px;
  font-size: 0.8rem;
}
.dash-kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-bottom: 8px;
}
.dash-kpi-card {
  background-color: var(--bg-main);
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}
.dash-kpi-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary-blue);
}

.mobile-phone-overlay {
  display: none; /* Hidden on tiny screens (<480px) */
}

/* Badges Ribbon */
.badges-ribbon {
  background-color: var(--bg-white);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.ribbon-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.ribbon-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background-color: var(--bg-main);
  border-radius: var(--radius-btn);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-blue);
}
.ribbon-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-color: var(--brand-orange-light);
  color: var(--brand-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

/* Services Section */
.services-section {
  padding: var(--space-4) 0;
  background-color: var(--bg-main);
}
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}
.service-card {
  background-color: var(--bg-white);
  border-radius: var(--radius-card);
  padding: var(--space-3);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-orange);
}
.service-icon-wrap {
  width: 48px;
  height: 48px;
  background-color: var(--primary-blue-light);
  color: var(--primary-blue);
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: var(--space-2);
}
.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 6px;
}
.service-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

/* Why Choose Us & Let's Connect Combined Section */
.why-connect-section {
  padding: var(--space-4) 0;
  background-color: var(--bg-white);
}
.why-connect-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.why-blue-card {
  background-color: var(--primary-blue);
  color: var(--bg-white);
  border-radius: var(--radius-card);
  padding: var(--space-3);
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
.why-blue-card h3 {
  color: var(--bg-white);
  font-size: 1.6rem;
  margin-bottom: var(--space-2);
}
.why-check-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.why-check-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: #E2E8F0;
}
.why-check-item i { color: var(--brand-orange); }

.shield-graphic-wrap { text-align: center; }
.shield-icon {
  font-size: 4.5rem;
  color: var(--brand-orange);
}

.connect-card {
  background-color: var(--bg-main);
  border-radius: var(--radius-card);
  padding: var(--space-3);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
}
.connect-card h3 {
  font-size: 1.5rem;
  color: var(--primary-blue);
  margin-bottom: 4px;
}
.contact-detail-line {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.9rem;
}
.contact-detail-line i { color: var(--primary-blue); }

.qr-connect-box {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--border-color);
}
.qr-svg {
  width: 68px;
  height: 68px;
  background-color: #FFF;
  padding: 4px;
  border-radius: var(--radius-input);
  border: 1px solid var(--border-color);
}

/* Callout Banner */
.callout-banner {
  background-color: var(--brand-orange);
  color: var(--bg-white);
  padding: var(--space-3) 0;
  text-align: center;
}
.callout-flex {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}
.callout-flex h3 {
  color: var(--bg-white);
  font-size: 1.3rem;
  margin-bottom: 4px;
}

/* Footer */
.site-footer {
  background-color: var(--primary-blue);
  color: #94A3B8;
  padding: var(--space-5) 0 var(--space-3) 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.footer-heading {
  color: var(--bg-white);
  font-size: 1rem;
  margin-bottom: var(--space-1);
}
.footer-links li { margin-bottom: 6px; }
.footer-links a {
  color: #CBD5E1;
  font-size: 0.875rem;
}
.footer-links a:hover { color: var(--brand-orange); }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-2);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  font-size: 0.8rem;
  color: #CBD5E1;
}

/* Modal Overlay System */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(11, 44, 125, 0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  padding: 12px;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.modal-box {
  background-color: var(--bg-white);
  border-radius: var(--radius-modal);
  max-width: 580px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-3);
  box-shadow: var(--shadow-lg);
  position: relative;
  transform: translateY(20px);
  transition: var(--transition);
}
.modal-overlay.active .modal-box {
  transform: translateY(0);
}
.modal-close-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--bg-main);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.1rem;
  color: var(--primary-blue);
  cursor: pointer;
}

/* Form Controls */
.form-group { margin-bottom: var(--space-2); }
.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.form-input {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-input);
  border: 1px solid var(--border-color);
  background-color: var(--bg-main);
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}
.form-input:focus {
  border-color: var(--primary-blue);
  background-color: var(--bg-white);
  box-shadow: 0 0 0 3px var(--primary-blue-light);
}

/* -------------------------------------------------------------------------- */
/* 2. Small Tablets & Large Phablets (Min-width: 481px)                       */
/* -------------------------------------------------------------------------- */
@media (min-width: 481px) {
  .btn { width: auto; }
  .hero-cta-group { flex-direction: row; }
  .ribbon-grid { grid-template-columns: repeat(2, 1fr); }

  .mobile-phone-overlay {
    display: block;
    position: absolute;
    bottom: -15px;
    right: -15px;
    width: 150px;
    background-color: #0F172A;
    border: 3px solid var(--border-color);
    border-radius: 16px;
    padding: 6px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  }
}

/* -------------------------------------------------------------------------- */
/* 3. Tablets in Portrait & Landscape (Min-width: 640px to 991px)             */
/* -------------------------------------------------------------------------- */
@media (min-width: 640px) {
  .container { padding: 0 var(--space-3); }
  .announcement-flex { flex-direction: row; justify-content: space-between; text-align: left; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .ribbon-grid { grid-template-columns: repeat(3, 1fr); }
  .why-blue-card { grid-template-columns: 1.4fr 1fr; }
  .why-check-grid { grid-template-columns: repeat(2, 1fr); }
  .callout-banner { text-align: left; }
  .callout-flex { flex-direction: row; justify-content: space-between; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { flex-direction: row; justify-content: space-between; }
}

/* -------------------------------------------------------------------------- */
/* 4. Desktop & Laptop Displays (Min-width: 992px)                            */
/* -------------------------------------------------------------------------- */
@media (min-width: 992px) {
  .nav-container { height: 76px; }
  .brand-logo-wrap img { height: 48px; }

  .brand-logo-wrap {
    margin-right: var(--space-4);
  }

  /* Show inline Desktop Navigation Links with generous logo separation */
  .nav-links {
    display: flex !important;
    flex-direction: row;
    position: static;
    background: none;
    padding: 0;
    box-shadow: none;
    border: none;
    gap: var(--space-4);
    margin-left: 3.5rem; /* Generous separation distance from logo */
    margin-right: auto;
  }
  .nav-link { border-bottom: none; padding: 4px 0; }
  .mobile-toggle { display: none !important; }
  .nav-cta-desktop { display: inline-flex !important; }
  .mobile-menu-ctas { display: none !important; }

  /* 2-Column Desktop Hero Layout */
  .hero-section { padding: var(--space-6) 0; }
  .hero-grid { grid-template-columns: 1.1fr 1fr; gap: var(--space-4); }

  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .ribbon-grid { grid-template-columns: repeat(6, 1fr); }
  .why-connect-grid { grid-template-columns: 1.3fr 1fr; gap: var(--space-4); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1.2fr 1fr; }
  .modal-box { padding: var(--space-4); }
}

/* -------------------------------------------------------------------------- */
/* 5. Large Displays & Ultra-Wide TVs (Min-width: 1440px - 2560px+)          */
/* -------------------------------------------------------------------------- */
@media (min-width: 1440px) {
  .container { max-width: 1440px; padding: 0 var(--space-4); }
  .hero-section { padding: var(--space-7) 0; }
  .hero-title { font-size: 3.5rem; }
  .hero-desc { font-size: 1.15rem; }
}

@media (min-width: 1920px) {
  .container { max-width: 1720px; }
  .services-grid { grid-template-columns: repeat(5, 1fr); } /* 10 cards in 2 clean rows of 5 on 4K TVs */
  .section-header h2 { font-size: 3rem; }
}