/* ==========================================================================
   bvkCOMM — Core Stylesheet
   Satellite Communication branded website
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Brand Colors */
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1d4ed8;
  --color-accent: #06b6d4;

  /* Backgrounds */
  --color-bg-dark: #0f172a;
  --color-bg-dark-alt: #1e293b;
  --color-bg-light: #f8fafc;

  /* Text */
  --color-text-on-dark: #f1f5f9;
  --color-text-on-light: #1e293b;
  --color-text-muted: #94a3b8;

  /* Borders & Overlays */
  --color-border-light: rgba(255, 255, 255, 0.08);
  --color-border-light-10: rgba(255, 255, 255, 0.1);
  --color-overlay-white-5: rgba(255, 255, 255, 0.05);

  /* Spacing & Radius */
  --radius-card: 1rem;       /* rounded-2xl */
  --radius-button: 9999px;   /* rounded-full */

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.7s ease;

  /* Navbar */
  --nav-height: 72px;
}

/* --------------------------------------------------------------------------
   2. Base / Reset Helpers
   -------------------------------------------------------------------------- */
html {
  scroll-behavior: smooth;
}

html {
  overflow-x: hidden;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--color-text-on-dark);
  background-color: var(--color-bg-dark);
  overflow-x: hidden;
}

/* Lock body scroll (used when mobile menu is open) */
body.overflow-hidden {
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   3. Glassmorphism Navbar
   -------------------------------------------------------------------------- */
.glass-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: var(--nav-height);
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--transition-base),
              box-shadow var(--transition-base);
}

.glass-nav.scrolled {
  background: rgba(15, 23, 42, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* --------------------------------------------------------------------------
   4. Dropdown Menus (Desktop)
   -------------------------------------------------------------------------- */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 220px;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border-light-10);
  border-radius: var(--radius-card);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-fast),
              transform var(--transition-fast),
              visibility var(--transition-fast);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 0.625rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: background var(--transition-fast),
              color var(--transition-fast);
}

.dropdown-menu a:hover {
  background: var(--color-overlay-white-5);
  color: var(--color-text-on-dark);
}

/* --------------------------------------------------------------------------
   5. Mobile Menu
   -------------------------------------------------------------------------- */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 360px;
  z-index: 60;
  background: rgba(15, 23, 42, 0.98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
  padding: 1.5rem;
}

.mobile-menu.active {
  transform: translateX(0);
}

/* Overlay behind mobile menu */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base),
              visibility var(--transition-base);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* --------------------------------------------------------------------------
   6. Hero Section
   -------------------------------------------------------------------------- */
.hero-dark {
  position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  overflow: hidden;
}

/* Radial glow overlays */
.hero-dark::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-dark::after {
  content: '';
  position: absolute;
  bottom: -20%;
  right: -10%;
  width: 50%;
  height: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

/* Subtle grid pattern overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   7. Scroll Animations (data-animate)
   -------------------------------------------------------------------------- */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-animate].animated {
  opacity: 1;
  transform: none;
}

/* Stagger children variants */
[data-animate="fade-up"] {
  transform: translateY(24px);
}

[data-animate="fade-left"] {
  transform: translateX(-24px);
}

[data-animate="fade-right"] {
  transform: translateX(24px);
}

[data-animate="fade-in"] {
  transform: none;
}

[data-animate="zoom-in"] {
  transform: scale(0.95);
}

[data-animate].animated {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   8. Glass Cards & Card Hover Effects
   -------------------------------------------------------------------------- */
.glass-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border-light-10);
  border-radius: var(--radius-card);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border-color: rgba(255, 255, 255, 0.15);
}

/* Dark variant */
.glass-dark {
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border-light-10);
  border-radius: var(--radius-card);
}

/* --------------------------------------------------------------------------
   9. Feature Icon Circles
   -------------------------------------------------------------------------- */
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.feature-icon svg,
.feature-icon i {
  width: 24px;
  height: 24px;
}

/* --------------------------------------------------------------------------
   10. Product Badge
   -------------------------------------------------------------------------- */
.product-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 9999px;
  background: rgba(37, 99, 235, 0.15);
  color: var(--color-primary-light);
  border: 1px solid rgba(37, 99, 235, 0.25);
}

/* --------------------------------------------------------------------------
   11. Language Buttons
   -------------------------------------------------------------------------- */
.lang-btn {
  padding: 0.25rem 0.625rem;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: 0.375rem;
  color: var(--color-text-muted);
  cursor: pointer;
  border: 1px solid transparent;
  background: transparent;
  transition: color var(--transition-fast),
              background var(--transition-fast),
              border-color var(--transition-fast);
}

.lang-btn:hover {
  color: var(--color-text-on-dark);
  background: var(--color-overlay-white-5);
}

.lang-btn.active-lang {
  color: var(--color-primary-light);
  background: rgba(37, 99, 235, 0.1);
  border-color: rgba(37, 99, 235, 0.3);
}

/* Language Dropdown Items */
.lang-dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-radius: 0.5rem;
  cursor: pointer;
  border: none;
  background: transparent;
  transition: color var(--transition-fast), background var(--transition-fast);
  text-align: left;
}

.lang-dropdown-item:hover {
  color: var(--color-text-on-dark);
  background: var(--color-overlay-white-5);
}

.lang-dropdown-item.active-lang {
  color: var(--color-primary-light);
  background: rgba(37, 99, 235, 0.1);
}

/* --------------------------------------------------------------------------
   12. Form Inputs
   -------------------------------------------------------------------------- */
.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  color: var(--color-text-on-dark);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.75rem;
  outline: none;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              background var(--transition-fast);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-input:focus {
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Textarea variant */
textarea.form-input {
  min-height: 120px;
  resize: vertical;
}

/* Light-background form inputs */
.form-input-light {
  color: var(--color-text-on-light);
  background: #fff;
  border-color: #e2e8f0;
}

.form-input-light:focus {
  border-color: var(--color-primary);
  background: #fff;
}

/* --------------------------------------------------------------------------
   13. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-bg-dark);
  border-top: 1px solid var(--color-border-light);
  color: var(--color-text-muted);
}

.site-footer a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.site-footer a:hover {
  color: var(--color-text-on-dark);
}

/* --------------------------------------------------------------------------
   14. Utility / Misc
   -------------------------------------------------------------------------- */

/* Hide scrollbar but keep scroll functionality */
.hide-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.hide-scrollbar::-webkit-scrollbar {
  display: none;
}

/* Gradient text utility */
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Blue glow for CTAs */
.glow-blue {
  box-shadow: 0 0 30px rgba(37, 99, 235, 0.4);
}

/* --------------------------------------------------------------------------
   15. Responsive Breakpoints
   -------------------------------------------------------------------------- */

/* Tablet (≤1024px) */
@media (max-width: 1024px) {
  :root {
    --nav-height: 64px;
  }

  .dropdown-menu {
    position: static;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    padding: 0 0 0 1rem;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
}

/* Mobile (≤640px) */
@media (max-width: 640px) {
  .feature-icon {
    width: 48px;
    height: 48px;
  }

  .feature-icon svg,
  .feature-icon i {
    width: 20px;
    height: 20px;
  }

  .glass-card:hover {
    transform: none; /* Disable lift on touch devices */
  }
}