/* ============================================
   RIHO SEPP - MAIN.CSS (OPTIMIZED & MOBILE-FRIENDLY)
   🎨 Modern Design 2025 - Fully Responsive
   ============================================ */

/* ============================================
   CSS VARIABLES - COLORFUL PALETTE
   ============================================ */
:root {
  /* Backgrounds */
  --bg-primary: #0f1419;
  --bg-secondary: #1a1f2e;
  --bg-tertiary: #242b3d;
  --bg-card: #1e2433;
  --bg-card-hover: #242d3f;
  
  /* Glass effect */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-hover: rgba(255, 255, 255, 0.08);
  
  /* Text colors */
  --text-primary: #ffffff;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  /* Accent colors */
  --accent-green: #00ff88;
  --accent-green-dark: #00cc6a;
  --accent-cyan: #00d9ff;
  --accent-cyan-dark: #00a8cc;
  --accent-purple: #a855f7;
  --accent-purple-dark: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-pink-dark: #db2777;
  --accent-orange: #f97316;
  --accent-orange-dark: #ea580c;
  --accent-blue: #0070f3;
  --accent-blue-dark: #0051b3;
  --accent-red: #ff4444;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
  --gradient-secondary: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  --gradient-tertiary: linear-gradient(135deg, var(--accent-orange), var(--accent-pink));
  
  /* Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --glow-green: 0 0 40px rgba(0, 255, 136, 0.4);
  --glow-cyan: 0 0 40px rgba(0, 217, 255, 0.4);
  --glow-purple: 0 0 40px rgba(168, 85, 247, 0.4);
  
  /* Spacing - Mobile-optimized */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Touch targets (minimum 44px for mobile) */
  --touch-target: 44px;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

/* Mobile font-size optimization */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, 
               Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Body scroll lock when menu is open - FIXED! */
body.menu-open {
  overflow: hidden;
  touch-action: none;
  -webkit-overflow-scrolling: touch;
}

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 255, 136, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 217, 255, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(168, 85, 247, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 60% 70%, rgba(236, 72, 153, 0.08) 0%, transparent 50%);
  animation: backgroundMove 20s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}

@keyframes backgroundMove {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -30px) scale(1.1);
  }
  66% {
    transform: translate(-20px, 20px) scale(0.9);
  }
}

/* Reduce animation on mobile for performance */
@media (max-width: 768px) {
  body::before {
    animation: backgroundMove 30s ease-in-out infinite;
  }
}

/* Particles effect */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(2px 2px at 20% 30%, rgba(255, 255, 255, 0.15), transparent),
    radial-gradient(2px 2px at 60% 70%, rgba(0, 255, 136, 0.2), transparent),
    radial-gradient(1px 1px at 50% 50%, rgba(0, 217, 255, 0.15), transparent),
    radial-gradient(1px 1px at 80% 10%, rgba(168, 85, 247, 0.15), transparent);
  background-size: 200% 200%;
  animation: particles 15s linear infinite;
  pointer-events: none;
  z-index: -1;
  opacity: 0.6;
}

@keyframes particles {
  0%, 100% {
    background-position: 0% 0%;
  }
  50% {
    background-position: 100% 100%;
  }
}

/* Disable particles on mobile for performance */
@media (max-width: 768px) {
  body::after {
    display: none;
  }
}

/* ============================================
   SELECTION & FOCUS
   ============================================ */
::selection {
  background: var(--accent-green);
  color: var(--bg-primary);
}

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
  width: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-green), var(--accent-cyan));
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
}

/* Thinner scrollbar on mobile */
@media (max-width: 768px) {
  ::-webkit-scrollbar {
    width: 6px;
  }
}

/* ============================================
   SKIP LINK (Accessibility)
   ============================================ */
.skip-link,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.skip-link:focus,
.sr-only:focus {
  position: fixed;
  top: var(--spacing-md);
  left: var(--spacing-md);
  width: auto;
  height: auto;
  padding: var(--spacing-md);
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  background: var(--bg-card);
  color: var(--accent-green);
  border: 2px solid var(--accent-green);
  border-radius: var(--radius-md);
  z-index: 10000;
  text-decoration: none;
  box-shadow: var(--glow-green);
}

/* ============================================
   NAVIGATION - FULLY RESPONSIVE
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  background: rgba(15, 20, 25, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  padding: var(--spacing-md) 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Mobile nav-container */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 var(--spacing-md);
  }
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: all var(--transition-normal);
  cursor: pointer;
  letter-spacing: -0.5px;
  /* Ensure minimum touch target */
  min-height: var(--touch-target);
  display: flex;
  align-items: center;
}

.logo:hover {
  transform: scale(1.05);
  filter: brightness(1.2);
}

/* Mobile logo */
@media (max-width: 768px) {
  .logo {
    font-size: 1.3rem;
  }
}

/* ============================================
   MOBILE MENU TOGGLE
   ============================================ */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  /* Ensure touch target size */
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  justify-content: center;
  align-items: center;
  z-index: 1001;
  transition: transform var(--transition-normal);
}

.nav-toggle:hover {
  transform: scale(1.1);
}

.nav-toggle:active {
  transform: scale(0.95);
}

.nav-toggle span {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: all var(--transition-normal);
}

/* Animated hamburger menu */
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
  background: var(--accent-green);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
  background: var(--accent-green);
}

/* ============================================
   NAVIGATION LINKS
   ============================================ */
.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-sm);
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  /* Touch-friendly */
  min-height: var(--touch-target);
  display: flex;
  align-items: center;
}

.nav-links a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

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

.nav-links a:hover::before {
  width: 80%;
}

.nav-links a.active {
  color: var(--text-primary);
  background: var(--glass-bg);
}

.nav-links a.active::before {
  width: 80%;
}

/* ============================================
   LANGUAGE SELECTOR
   ============================================ */
.language-selector {
  display: flex;
  gap: var(--spacing-xs);
  background: var(--glass-bg);
  padding: var(--spacing-xs);
  border-radius: var(--radius-full);
  border: 1px solid var(--glass-border);
}

.lang-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  font-size: 0.85rem;
  font-weight: 600;
  /* Touch-friendly */
  min-height: 36px;
  min-width: 60px;
}

.lang-btn:hover {
  color: var(--text-primary);
  background: var(--glass-hover);
}

.lang-btn.active {
  background: var(--accent-green);
  color: var(--bg-primary);
}

/* Hide desktop language selector on mobile */
.language-menu-mobile {
  display: none;
}

/* ============================================
   BUTTONS & CTA
   ============================================ */
.btn-modern {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--gradient-primary);
  color: var(--text-primary);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  /* Touch-friendly */
  min-height: var(--touch-target);
}

.btn-modern::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-modern:hover::before {
  width: 300px;
  height: 300px;
}

.btn-modern:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-green);
}

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

.btn-secondary {
  background: var(--gradient-secondary);
  box-shadow: var(--glow-purple);
}

.btn-secondary:hover {
  box-shadow: var(--glow-purple);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

/* Mobile sections */
@media (max-width: 768px) {
  .section {
    padding: var(--spacing-xl) var(--spacing-md);
  }
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.card:hover {
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
  border-color: var(--accent-green);
}

/* Mobile cards */
@media (max-width: 768px) {
  .card {
    padding: var(--spacing-lg);
  }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-xl);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-2xl);
}

.footer-brand {
  flex: 1;
}

.footer-brand .logo {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-sm);
}

.footer-brand p {
  color: var(--text-muted);
  max-width: 400px;
  line-height: 1.8;
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  /* Touch-friendly */
  min-width: var(--touch-target);
  min-height: var(--touch-target);
}

.social-link:hover {
  background: var(--accent-green);
  border-color: var(--accent-green);
  transform: translateY(-3px);
  box-shadow: var(--glow-green);
}

.social-link img {
  width: 24px;
  height: 24px;
  filter: brightness(0.8);
  transition: filter var(--transition-normal);
}

.social-link:hover img {
  filter: brightness(1.2);
}

.footer-bottom {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================
   MOBILE RESPONSIVE - TABLET
   ============================================ */
@media (max-width: 1024px) {
  .nav-links {
    gap: var(--spacing-xs);
  }
  
  .nav-links a {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
  }
}

/* ============================================
   MOBILE RESPONSIVE - PHONE
   ============================================ */
@media (max-width: 768px) {
  
  /* Show hamburger menu */
  .nav-toggle {
    display: flex;
  }
  
  /* Hide desktop nav-links, show mobile menu */
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--bg-primary);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: 0;
    /* Hidden by default */
    transform: translateX(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0s 0.3s;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    z-index: 999;
    border-bottom: 1px solid var(--glass-border);
  }
  
  /* Show mobile menu when active */
  .nav-links.active {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }
  
  /* Mobile menu items */
  .nav-links li {
    width: 100%;
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  
  /* Staggered animation for menu items */
  .nav-links.active li {
    opacity: 1;
    transform: translateX(0);
  }
  
  .nav-links.active li:nth-child(1) { transition-delay: 0.05s; }
  .nav-links.active li:nth-child(2) { transition-delay: 0.1s; }
  .nav-links.active li:nth-child(3) { transition-delay: 0.15s; }
  .nav-links.active li:nth-child(4) { transition-delay: 0.2s; }
  .nav-links.active li:nth-child(5) { transition-delay: 0.25s; }
  .nav-links.active li:nth-child(6) { transition-delay: 0.3s; }
  .nav-links.active li:nth-child(7) { transition-delay: 0.35s; }
  .nav-links.active li:nth-child(8) { transition-delay: 0.4s; }
  .nav-links.active li:nth-child(9) { transition-delay: 0.45s; }
  
  .nav-links a {
    display: block;
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.1rem;
    border-radius: var(--radius-md);
    text-align: left;
  }
  
  .nav-links a::before {
    display: none;
  }
  
  .nav-links a:hover,
  .nav-links a.active {
    background: var(--glass-bg);
    color: var(--accent-green);
  }
  
  /* Hide desktop language selector */
  .language-selector {
    display: none !important;
  }
  
  /* Show mobile language selector */
  .language-menu-mobile {
    display: block;
    width: 100%;
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--glass-border);
    margin-top: var(--spacing-lg);
  }
  
  .mobile-lang-title {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
  }
  
  .mobile-lang-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-md);
  }
  
  .lang-btn-mobile {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    /* Touch-friendly */
    min-height: var(--touch-target);
  }
  
  .lang-btn-mobile:active {
    transform: scale(0.95);
  }
  
  .lang-btn-mobile:hover,
  .lang-btn-mobile.active {
    background: var(--accent-green);
    color: var(--bg-primary);
    border-color: var(--accent-green);
  }
  
  /* Mobile buttons */
  .btn-modern {
    width: 100%;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
  }
  
  /* Mobile footer */
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-brand p {
    margin: 0 auto;
  }
  
  .social-links {
    justify-content: center;
  }
}

/* ============================================
   SMALL MOBILE - EXTRA OPTIMIZATIONS
   ============================================ */
@media (max-width: 480px) {
  .nav-links {
    padding: var(--spacing-md);
  }
  
  .mobile-lang-buttons {
    grid-template-columns: 1fr;
  }
  
  .social-link {
    width: 44px;
    height: 44px;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .card {
    padding: var(--spacing-md);
  }
}

/* ============================================
   PERFORMANCE OPTIMIZATIONS
   ============================================ */

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.hidden {
  display: none !important;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border-width: 0 !important;
}

.text-center {
  text-align: center;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  body::before,
  body::after,
  .navbar,
  .nav-toggle,
  .skip-link,
  .social-links {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  a {
    color: black;
    text-decoration: underline;
  }
}
/* ============================================
   CRITICAL FIXES - SCROLL BUG
   Lisa automaatselt
   ============================================ */

/* Ensure main content is always visible */
main,
#main-content {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

/* Ensure all major sections stack properly */
section {
  position: relative;
  z-index: 1;
}

/* Force body to never be fixed position */
body {
  position: relative !important;
}

/* When menu is open, only hide overflow - nothing else */
body.menu-open {
  position: relative !important;
  overflow: hidden !important;
  height: auto !important;
  width: auto !important;
}

/* Ensure content wrapper is always relative */
.container,
.content,
.hero-dual,
.facts-section,
.updates-section {
  position: relative;
  z-index: 1;
}

/* Fix for potential iOS scroll issues */
@supports (-webkit-overflow-scrolling: touch) {
  body {
    -webkit-overflow-scrolling: touch;
  }
}