:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #eff6ff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  /* Multi-layered shadow for "lifted" feel */
  --shadow-premium: 
    0 2px 4px rgba(0,0,0,0.02),
    0 10px 20px rgba(0,0,0,0.04),
    0 20px 40px rgba(0,0,0,0.04);
}

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

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-main);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3%3Ffilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  background-attachment: fixed;
  background-blend-mode: soft-light;
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: 0.3s;
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

.navbar {
  max-width: 1200px;
  margin: auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--primary);
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  font-weight: 500;
  font-size: 0.9375rem;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: 0.3s;
}

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

.language-buttons {
  display: flex;
  gap: 0.5rem;
}

.language-buttons button {
  border: 1px solid var(--border);
  background: white;
  padding: 0.5rem 0.875rem;
  border-radius: 9999px;
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 600;
  transition: all 0.2s;
}

.language-buttons button:hover {
  background: var(--secondary);
  border-color: var(--primary);
  box-shadow: 0 0 15px rgba(37, 99, 235, 0.2);
}

.language-buttons button.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Sections */
section {
  padding: 8rem 1.5rem;
}

.container {
  max-width: 1200px;
  margin: auto;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: 
    radial-gradient(circle at 10% 20%, rgba(37, 99, 235, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 90% 80%, rgba(37, 99, 235, 0.05) 0%, transparent 50%);
  padding-top: 8rem;
}

.hero-content {
  max-width: 800px;
}

.hero h1 {
  font-size: clamp(2.75rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.05em;
  margin-bottom: 1.5rem;
  color: #1e293b;
}

.hero p {
  font-size: 1.35rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  padding: 1rem 2.5rem;
  border-radius: 9999px;
  font-weight: 600;
  display: inline-block;
  cursor: pointer;
  transition: 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 10px 20px -5px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 15px 30px -5px rgba(37, 99, 235, 0.5);
}

.btn-secondary {
  background: white;
  border: 1px solid var(--border);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: var(--bg-main);
  border-color: var(--primary);
  transform: translateY(-3px);
}

/* Titles */
.section-title {
  text-align: center;
  margin-bottom: 5rem;
}

.section-title h2 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  letter-spacing: -0.025em;
}

.section-title p {
  color: var(--text-muted);
  font-size: 1.125rem;
  max-width: 650px;
  margin: auto;
}

/* Features & Cards */
.feature-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  padding: 3rem;
  border-radius: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: var(--shadow- premium);
  transition: 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.feature-card:hover {
  transform: translateY(-12px);
  background: white;
  border-color: var(--primary);
  box-shadow: 0 30px 60px -12px rgba(0,0,0,0.08);
}

.feature-card h3 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 1rem;
}

/* Interactivity & Modern CSS */
.feature-card:has(a:hover) {
  border-color: var(--primary);
  transform: translateY(-8px);
}

/* FAQ Item */
.faq-item {
  padding: 2rem;
  border-radius: 1.5rem;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.5);
  transition: 0.3s;
}

.faq-item:hover {
  background: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-premium);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-content {
  animation: fadeIn 1.2s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* Ad-friendly spaces (placeholders) */
.ad-container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 1.5rem;
  background: rgba(241, 245, 249, 0.5);
  border: 2px dashed #cbd5e1;
  border-radius: 1rem;
  text-align: center;
  color: #94a3b8;
  font-size: 0.85rem;
  display: none;
}