/* ==========================================================================
   ECM IT-Consulting - Mobile-First Responsive System
   Consistent Layouts for Chrome, Safari (macOS/iOS), Edge, and Firefox
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. BASE MOBILE STYLES (Smartphone Default: < 768px)
   -------------------------------------------------------------------------- */

/* Fluid Container with Safe Mobile Padding */
.container {
  width: 100%;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

/* Compact Section Paddings for Handheld Screens */
.section {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
  position: relative;
}

/* Touch Targets: minimum 44px by 44px */
.btn,
.btn-sm,
.btn-lg,
.nav-link,
.dropdown-link,
.mobile-nav-toggle,
.back-to-top,
.cookie-reopen-floating,
.cookie-btn,
.cookie-link-btn,
.form-input,
.form-select,
.form-textarea {
  min-height: 44px;
}

/* Mobile Header & Top Bar */
.site-header {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border, #e2e8f0);
  z-index: 1000;
  -webkit-transition: box-shadow 0.2s ease;
  transition: box-shadow 0.2s ease;
}

.top-bar {
  padding: 6px 0;
}

.top-bar a {
  min-height: 44px;
  display: -webkit-inline-flex;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

.header-inner {
  height: 64px;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  -ms-flex-pack: justify;
  justify-content: space-between;
}

/* Mobile Nav Toggle Icon */
.mobile-nav-toggle {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 8px;
  border-radius: 8px;
  -webkit-border-radius: 8px;
  color: var(--color-primary, #0f172a);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.header-cta-btn {
  display: none;
}

/* Off-Canvas Navigation Drawer for Mobile */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ffffff;
  padding: 5rem 1.5rem 2rem;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  -webkit-transform: translateX(100%);
  -ms-transform: translateX(100%);
  transform: translateX(100%);
  opacity: 0;
  visibility: hidden;
  -webkit-transition: -webkit-transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
  z-index: 999;
}

.main-nav.is-open {
  -webkit-transform: translateX(0);
  -ms-transform: translateX(0);
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
}

.main-nav ul {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-link {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  -ms-flex-pack: justify;
  justify-content: space-between;
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: #0f172a;
  border-radius: 8px;
  -webkit-border-radius: 8px;
}

.nav-link:hover,
.nav-link:focus-visible {
  background-color: #eff6ff;
  color: #2563eb;
}

/* Mobile Dropdown Submenus */
.dropdown-menu {
  position: static;
  opacity: 1;
  visibility: visible;
  -webkit-transform: none;
  -ms-transform: none;
  transform: none;
  box-shadow: none;
  -webkit-box-shadow: none;
  border: none;
  background-color: #f8fafc;
  border-radius: 8px;
  -webkit-border-radius: 8px;
  margin: 0.25rem 0 0.5rem;
  padding: 0.5rem;
  display: none;
}

.has-dropdown.mobile-open .dropdown-menu {
  display: block;
}

.has-dropdown.mobile-open .dropdown-icon {
  -webkit-transform: rotate(180deg);
  -ms-transform: rotate(180deg);
  transform: rotate(180deg);
}

.dropdown-link {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  padding: 0.625rem 0.875rem;
  border-radius: 6px;
  -webkit-border-radius: 6px;
}

/* Single Column Grid Baseline on Mobile */
.grid,
.grid-2,
.grid-3,
.grid-4,
.grid-1-2,
.grid-2-1,
.hero-grid,
.process-grid,
.testimonials-grid,
.partners-grid,
.metrics-grid,
.footer-top,
.contact-grid,
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

/* Full-width Actions on Mobile */
.hero-actions,
.cta-actions {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  width: 100%;
  gap: 0.75rem;
}

.hero-actions .btn,
.cta-actions .btn {
  width: 100%;
  min-height: 48px;
}

/* Footer Mobile Layout */
.footer-bottom {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  gap: 1rem;
  -webkit-box-align: flex-start;
  -ms-flex-align: flex-start;
  align-items: flex-start;
}

.footer-legal-links {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-legal-links a {
  min-height: 44px;
  display: -webkit-inline-flex;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

/* --------------------------------------------------------------------------
   2. TABLET BREAKPOINT (@media min-width: 768px)
   -------------------------------------------------------------------------- */
@media (min-width: 768px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .section {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }

  .header-inner {
    height: 72px;
  }

  /* Two Column Grids on Tablet */
  .grid-2,
  .grid-4,
  .process-grid,
  .testimonials-grid,
  .partners-grid,
  .metrics-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .footer-top {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }

  .footer-bottom {
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    -webkit-flex-direction: row;
    -ms-flex-direction: row;
    flex-direction: row;
    -webkit-box-pack: justify;
    -webkit-justify-content: space-between;
    -ms-flex-pack: justify;
    justify-content: space-between;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
  }

  .hero-actions,
  .cta-actions {
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    -webkit-flex-direction: row;
    -ms-flex-direction: row;
    flex-direction: row;
    width: auto;
  }

  .hero-actions .btn,
  .cta-actions .btn {
    width: auto;
  }
}

/* --------------------------------------------------------------------------
   3. DESKTOP BREAKPOINT (@media min-width: 1024px)
   -------------------------------------------------------------------------- */
@media (min-width: 1024px) {
  .container {
    max-width: var(--container-max, 1200px);
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .section {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
  }

  .header-inner {
    height: var(--header-height, 80px);
  }

  /* Hide Mobile Menu Toggle on Desktop */
  .mobile-nav-toggle {
    display: none !important;
  }

  /* Show Header CTA Button */
  .header-cta-btn {
    display: -webkit-inline-flex !important;
    display: -ms-inline-flexbox !important;
    display: inline-flex !important;
  }

  /* Restore Standard Horizontal Desktop Navigation */
  .main-nav {
    position: static !important;
    display: -webkit-box !important;
    display: -webkit-flex !important;
    display: -ms-flexbox !important;
    display: flex !important;
    -webkit-transform: none !important;
    -ms-transform: none !important;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    background: transparent !important;
    border: none !important;
    padding: 0 !important;
    width: auto !important;
    height: auto !important;
    overflow-y: visible !important;
    z-index: auto !important;
  }

  .main-nav ul {
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    -webkit-flex-direction: row;
    -ms-flex-direction: row;
    flex-direction: row;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 0.25rem;
  }

  .nav-link {
    width: auto;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary, #475569);
  }

  /* Desktop Absolute Dropdown Flyout */
  .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 260px;
    background: #ffffff;
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: 12px;
    -webkit-border-radius: 12px;
    box-shadow: 0 10px 15px -3px rgba(15, 23, 42, 0.08);
    -webkit-box-shadow: 0 10px 15px -3px rgba(15, 23, 42, 0.08);
    padding: 0.5rem;
    margin-top: 0;
    opacity: 0;
    visibility: hidden;
    -webkit-transform: translateY(8px);
    -ms-transform: translateY(8px);
    transform: translateY(8px);
    -webkit-transition: opacity 0.2s ease, -webkit-transform 0.2s ease, visibility 0.2s ease;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    display: block;
    z-index: 1010;
  }

  .has-dropdown:hover .dropdown-menu,
  .has-dropdown:focus-within .dropdown-menu,
  .dropdown-menu.is-open {
    opacity: 1 !important;
    visibility: visible !important;
    -webkit-transform: translateY(0) !important;
    -ms-transform: translateY(0) !important;
    transform: translateY(0) !important;
  }

  .dropdown-link {
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    -webkit-flex-direction: row;
    -ms-flex-direction: row;
    flex-direction: row;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    padding: 0.625rem 0.75rem;
    font-size: 0.875rem;
  }

  /* Multi-Column Layouts on Desktop */
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
  }

  .grid-1-2 {
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
  }

  .grid-2-1 {
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
  }

  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
  }

  .process-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
  }

  .partners-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
  }

  .footer-top {
    grid-template-columns: 2fr 1fr 1fr 1.25fr;
    gap: 2.5rem;
  }

  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

/* --------------------------------------------------------------------------
   4. LARGE DESKTOP BREAKPOINT (@media min-width: 1280px)
   -------------------------------------------------------------------------- */
@media (min-width: 1280px) {
  .container {
    max-width: 1240px;
  }

  .section {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }
}

/* --------------------------------------------------------------------------
   5. iOS Safe Area Insets (iPhone Notch & Dynamic Island)
   -------------------------------------------------------------------------- */
@supports (padding: max(0px)) {
  .site-header {
    padding-left: max(0px, env(safe-area-inset-left));
    padding-right: max(0px, env(safe-area-inset-right));
  }

  .footer-bottom {
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
  }

  .cookie-reopen-floating,
  .back-to-top {
    bottom: max(20px, calc(15px + env(safe-area-inset-bottom)));
  }

  .cookie-banner-card {
    margin-bottom: max(0px, env(safe-area-inset-bottom));
  }
}