/* ==========================================================================
   1. CSS RESET & VARIABLES
   Strict brand palette:
   - Primary Blue: #0B4DDB
   - Deep Blue: #082E85
   - Light Tint: #EAF1FF
   - White: #FFFFFF
   - WhatsApp Green: #25D366 (only for WhatsApp elements)
   ========================================================================== */
:root {
  --color-primary: #0B4DDB;
  --color-primary-dark: #082E85;
  --color-primary-tint: #EAF1FF;
  --color-white: #FFFFFF;
  --color-whatsapp: #25D366;
  --color-whatsapp-hover: #20BA5A;

  /* Accessible text contrast levels */
  --color-text-dark: #0C1E3C;
  --color-text-body: #1E3150;
  --color-text-muted: #4A6080;
  --color-border: #D2E0FB;

  --font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 10px rgba(11, 77, 219, 0.06);
  --shadow-card: 0 8px 30px rgba(11, 77, 219, 0.08);
  --shadow-floating: 0 10px 30px rgba(18, 140, 126, 0.35);

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --container-max-width: 1140px;
}

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

html {
  font-family: var(--font-family);
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  color: var(--color-text-body);
  background-color: var(--color-white);
}

body {
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

/* Accessible Keyboard Focus Style */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.btn-focus-light:focus-visible {
  outline: 3px solid var(--color-white);
  outline-offset: 3px;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Section Layout Utility */
section {
  padding-top: 72px;
  padding-bottom: 72px;
  position: relative;
}

@media (min-width: 768px) {
  section {
    padding-top: 96px;
    padding-bottom: 96px;
  }
}

.section-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background-color: var(--color-primary-tint);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.section-badge-light {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.15);
}

.section-heading {
  font-size: 1.875rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

@media (min-width: 768px) {
  .section-heading {
    font-size: 2.375rem;
  }
}

.section-subheading {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin-bottom: 40px;
}

/* ==========================================================================
   2. NAVIGATION BAR (Sticky)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-primary-tint);
  z-index: 1000;
  transition: box-shadow var(--transition-fast);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(11, 77, 219, 0.08);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-icon svg {
  width: 20px;
  height: 20px;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-body);
  padding: 6px 2px;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  display: none;
}

@media (min-width: 880px) {
  .nav-links {
    display: flex;
  }
  .nav-cta {
    display: inline-flex;
  }
  .mobile-toggle-btn {
    display: none;
  }
}

/* Mobile Hamburger Button */
.mobile-toggle-btn {
  width: 44px;
  height: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-primary-tint);
  background-color: var(--color-white);
  color: var(--color-primary);
  padding: 10px;
}

.hamburger-bar {
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Hamburger Open State (X transform) */
.mobile-toggle-btn.is-active .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-toggle-btn.is-active .hamburger-bar:nth-child(2) {
  opacity: 0;
}
.mobile-toggle-btn.is-active .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Drawer */
.mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background-color: var(--color-white);
  border-bottom: 2px solid var(--color-primary-tint);
  box-shadow: 0 16px 30px rgba(11, 77, 219, 0.1);
  padding: 20px 24px 28px;
  z-index: 999;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-list a {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-dark);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-primary-tint);
}

.mobile-nav-list a:hover {
  color: var(--color-primary);
  padding-left: 6px;
}

.mobile-nav-cta {
  margin-top: 20px;
  width: 100%;
}

/* ==========================================================================
   3. BUTTON STYLES & HOVERS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

/* Primary Button (Blue) */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 6px 18px rgba(11, 77, 219, 0.25);
}

.btn-primary:hover {
  background-color: #093eb3;
  box-shadow: 0 8px 24px rgba(11, 77, 219, 0.35);
}

/* Outline Button (Blue border, white background) */
.btn-outline {
  background-color: var(--color-white);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary-tint);
}

/* WhatsApp Green Button */
.btn-whatsapp {
  background-color: var(--color-whatsapp);
  color: var(--color-white);
  box-shadow: 0 6px 18px rgba(37, 211, 102, 0.35);
}

.btn-whatsapp:hover {
  background-color: var(--color-whatsapp-hover);
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.45);
}

/* White on Deep Blue Button */
.btn-white {
  background-color: var(--color-white);
  color: var(--color-primary-dark);
  font-weight: 800;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.btn-white:hover {
  background-color: var(--color-primary-tint);
  color: var(--color-primary);
}

/* ==========================================================================
   4. HERO SECTION
   - Fade-in animation
   - Headline: "Grow your business online."
   ========================================================================== */
.hero-section {
  background: linear-gradient(180deg, var(--color-white) 0%, var(--color-primary-tint) 100%);
  padding-top: 80px;
  padding-bottom: 90px;
  text-align: center;
}

@media (min-width: 768px) {
  .hero-section {
    padding-top: 110px;
    padding-bottom: 120px;
  }
}

.hero-content {
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

/* Fade-in & slide-up animation */
@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-item {
  animation: heroFadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.fade-delay-1 {
  animation-delay: 0.1s;
}
.fade-delay-2 {
  animation-delay: 0.25s;
}
.fade-delay-3 {
  animation-delay: 0.4s;
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .fade-in-item {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .btn:hover,
  .service-card:hover,
  .why-card:hover,
  .floating-whatsapp:hover {
    transform: none !important;
  }
}

.hero-headline {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  margin-bottom: 22px;
}

@media (min-width: 640px) {
  .hero-headline {
    font-size: 3.25rem;
  }
}

@media (min-width: 992px) {
  .hero-headline {
    font-size: 4rem;
  }
}

.hero-subline {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--color-text-body);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 36px;
}

@media (min-width: 768px) {
  .hero-subline {
    font-size: 1.3rem;
  }
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

@media (min-width: 520px) {
  .hero-actions {
    flex-direction: row;
  }
}

.hero-actions .btn {
  width: 100%;
  max-width: 280px;
}

@media (min-width: 520px) {
  .hero-actions .btn {
    width: auto;
  }
}

/* Trust Pill under Hero */
.hero-pill-bar {
  margin-top: 48px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
}

.hero-pill svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
}

/* ==========================================================================
   5. ABOUT SECTION
   - Friendly intro, text only, no person, name, or photo
   - Light blue tint background: #EAF1FF
   ========================================================================== */
.about-section {
  background-color: var(--color-primary-tint);
}

.about-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

@media (min-width: 768px) {
  .about-card {
    padding: 60px 50px;
  }
}

.about-text-content {
  max-width: 880px;
  margin: 0 auto;
}

.about-lead {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.5;
  margin-bottom: 20px;
}

.about-paragraphs {
  display: flex;
  flex-direction: column;
  gap: 18px;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-text-body);
}

/* ==========================================================================
   6. SERVICES SECTION
   - Three cards: Meta Ads, Google Ads, Website creation
   - WhatsApp links on each card
   - Background: White
   ========================================================================== */
.services-section {
  background-color: var(--color-white);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 820px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
  border-color: var(--color-primary);
}

.service-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-tint);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.service-card:hover .service-icon-box {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.service-icon-box svg {
  width: 28px;
  height: 28px;
}

.service-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.service-subtitle {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.service-description {
  font-size: 0.975rem;
  color: var(--color-text-body);
  line-height: 1.65;
  margin-bottom: 28px;
  flex-grow: 1;
}

.service-card-action {
  margin-top: auto;
}

.service-whatsapp-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  padding: 10px 0;
  border-bottom: 2px solid transparent;
  transition: var(--transition-fast);
}

.service-whatsapp-link:hover {
  color: #093eb3;
  border-bottom-color: var(--color-primary);
  gap: 12px;
}

.service-whatsapp-link svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

/* ==========================================================================
   7. WHY US SECTION
   - 4 points: results-focused, affordable packages, clear reporting, direct WhatsApp support
   - Background: Light blue tint: #EAF1FF
   ========================================================================== */
.why-section {
  background-color: var(--color-primary-tint);
}

.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .why-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.why-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 30px 22px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.why-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-tint);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.why-icon-box svg {
  width: 24px;
  height: 24px;
}

.why-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.why-desc {
  font-size: 0.925rem;
  color: var(--color-text-body);
  line-height: 1.6;
}

/* ==========================================================================
   8. CONTACT SECTION
   - Dark blue band: #082E85
   - Headline: "Ready to grow your business?"
   - Large WhatsApp button
   - Number: +254 707 790 246
   ========================================================================== */
.contact-section {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  text-align: center;
  padding-top: 84px;
  padding-bottom: 84px;
}

@media (min-width: 768px) {
  .contact-section {
    padding-top: 104px;
    padding-bottom: 104px;
  }
}

.contact-content {
  max-width: 740px;
  margin-left: auto;
  margin-right: auto;
}

.contact-heading {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-white);
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

@media (min-width: 768px) {
  .contact-heading {
    font-size: 3rem;
  }
}

.contact-subline {
  font-size: 1.125rem;
  color: #D2E0FB;
  line-height: 1.65;
  margin-bottom: 36px;
}

.contact-cta-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.btn-large-whatsapp {
  font-size: 1.15rem;
  padding: 18px 36px;
  border-radius: var(--radius-full);
}

.contact-phone-box {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-white);
  font-size: 1.1rem;
  font-weight: 700;
  transition: background-color var(--transition-fast);
}

.contact-phone-box:hover {
  background-color: rgba(255, 255, 255, 0.16);
}

.contact-phone-box svg {
  width: 20px;
  height: 20px;
  color: var(--color-whatsapp);
}

/* ==========================================================================
   9. FOOTER
   - "© [current year] Kad Digital Marketing Agency"
   - 3 social icons (Instagram, Facebook, TikTok) as round blue buttons
   ========================================================================== */
.site-footer {
  background-color: #062265;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #B4C6E7;
  padding: 38px 0;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  text-align: center;
}

@media (min-width: 680px) {
  .footer-container {
    flex-direction: row;
    text-align: left;
  }
}

.copyright-text {
  font-size: 0.95rem;
}

.social-icons-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.social-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.social-btn:hover {
  background-color: #093eb3;
  transform: translateY(-3px);
  box-shadow: 0 6px 14px rgba(11, 77, 219, 0.4);
}

.social-btn svg {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   10. FLOATING WHATSAPP BUTTON (Fixed at BOTTOM LEFT)
   ========================================================================== */
.floating-whatsapp {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: var(--color-whatsapp);
  color: var(--color-white);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  box-shadow: var(--shadow-floating);
  justify-content: center;
  transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.floating-whatsapp:hover {
  background-color: var(--color-whatsapp-hover);
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 12px 36px rgba(18, 140, 126, 0.45);
}

.floating-whatsapp:active {
  transform: scale(0.96);
}

.floating-whatsapp svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

/* Floating button tooltip hint for desktop */
.floating-whatsapp-tooltip {
  position: absolute;
  left: 72px;
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 700;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.floating-whatsapp-tooltip::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -4px;
  transform: translateY(-50%);
  border-width: 4px 4px 4px 0;
  border-style: solid;
  border-color: transparent var(--color-primary-dark) transparent transparent;
}

.floating-whatsapp:hover .floating-whatsapp-tooltip,
.floating-whatsapp:focus-visible .floating-whatsapp-tooltip {
  opacity: 1;
  transform: translateX(0);
}

@media (max-width: 480px) {
  .floating-whatsapp {
    bottom: 18px;
    left: 18px;
    width: 54px;
    height: 54px;
  }
  .floating-whatsapp svg {
    width: 28px;
    height: 28px;
  }
  .floating-whatsapp-tooltip {
    display: none;
  }
}