:root {
  /* Bright Color Palette (No Yellow) */
  --bg-main: #f4f7fc;
  --bg-card: #ffffff;
  --primary: #2563eb;         /* Vibrant Electric Blue */
  --primary-hover: #1d4ed8;
  --secondary: #7c3aed;       /* Royal Purple */
  --accent-cyan: #06b6d4;     /* Bright Cyan */
  --text-main: #0f172a;       /* Deep Slate */
  --text-muted: #475569;      /* Cool Gray */
  --border-color: #e2e8f0;
  --nav-bg: #ffffff;
  --banner-bg: #eff6ff;       /* Light blue tint */
  --banner-border: #3b82f6;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-family);
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--secondary);
}

/* Header & Navigation */
header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03);
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2rem;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.logo span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 600;
}

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

/* Colorful Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  display: inline-block;
  text-align: center;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
  transition: all 0.3s ease;
}

.btn-primary:hover {
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.35);
}

.btn-secondary {
  background: #ffffff;
  color: var(--primary);
  border: 2px solid var(--primary);
  padding: 0.65rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  display: inline-block;
  text-align: center;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background: var(--banner-bg);
  color: var(--primary-hover);
  transform: translateY(-2px);
}

/* Containers */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
  width: 100%;
  flex: 1;
}

.hero {
  text-align: center;
  padding: 4rem 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3.2rem;
  margin-bottom: 1.2rem;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--text-main), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Grids & Cards */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.2rem;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.04);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

/* Colorful gradient line on card hover */
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 15px 35px rgba(37, 99, 235, 0.1);
}

.card:hover::before {
  opacity: 1;
}

.card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.8rem;
  color: var(--text-main);
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Pricing Section */
.price-tag {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--primary);
  margin: 1rem 0;
}

.price-tag span {
  font-size: 1rem;
  color: var(--text-muted);
}

/* Purchase Notice Banner */
.purchase-notice {
  background: linear-gradient(135deg, #e0f2fe, #f0f9ff);
  border: 1px solid #7dd3fc;
  border-left: 5px solid var(--accent-cyan);
  border-radius: 12px;
  padding: 1.2rem 1.8rem;
  text-align: center;
  margin-bottom: 3rem;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.08);
}

.purchase-notice p {
  font-weight: 600;
  color: #0369a1;
}

/* Contact & QR Codes */
.qr-container {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.qr-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.8rem;
  border-radius: 16px;
  text-align: center;
  width: 270px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.04);
}

.qr-box img {
  width: 180px;
  height: 180px;
  background: #f8fafc;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin: 1rem 0;
}

/* Footer */
footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.8rem;
  margin-bottom: 1rem;
}

.footer-links a {
  color: var(--text-muted);
  font-weight: 500;
}

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

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 1rem;
  }
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
}