:root {
  --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  --gradient-5: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --bg-dark: #0f0c29;
  --bg-card: rgba(255, 255, 255, 0.05);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --shadow-glow: 0 8px 32px rgba(31, 38, 135, 0.37);
  --border-glass: 1px solid rgba(255, 255, 255, 0.18);
}

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

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-dark);
  background-image:
    radial-gradient(at 0% 0%, rgba(102, 126, 234, 0.1) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(245, 87, 108, 0.1) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(79, 172, 254, 0.1) 0px, transparent 50%),
    radial-gradient(at 0% 100%, rgba(67, 233, 123, 0.1) 0px, transparent 50%);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated background particles - MORE VISIBLE */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}

.particle {
  position: absolute;
  background: rgba(102, 126, 234, 0.25);
  border-radius: 50%;
  animation: float 20s infinite;
  box-shadow: 0 0 20px rgba(79, 172, 254, 0.3);
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0) translateX(0) scale(1);
    opacity: 0;
  }

  10% {
    opacity: 0.6;
  }

  50% {
    opacity: 0.8;
  }

  90% {
    opacity: 0.6;
  }

  100% {
    transform: translateY(-100vh) translateX(50px) scale(0.5);
    opacity: 0;
  }
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 12, 41, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: var(--border-glass);
  padding: 1.5rem 2rem;
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.logo {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  animation: shimmer 3s infinite;
  text-align: center;
}

@keyframes shimmer {

  0%,
  100% {
    filter: brightness(1);
  }

  50% {
    filter: brightness(1.3);
  }
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: var(--gradient-3);
  border: none;
  color: white;
  font-size: 1.5rem;
  padding: 0.5rem 1rem;
  border-radius: 12px;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
  transition: transform 0.3s ease;
  z-index: 101;
}

.menu-toggle:hover {
  transform: scale(1.05);
}

/* Navigation - BUTTON STYLE WITH BORDERS AND SHADOWS */
nav {
  width: 100%;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  justify-content: center;
}

nav a {
  color: var(--text-primary);
  text-decoration: none;
  padding: 0.6rem 1.2rem;
  border-radius: 10px;
  transition: all 0.3s ease;
  font-weight: 500;
  font-size: 0.9rem;
  border: 2px solid rgba(79, 172, 254, 0.3);
  display: block;
  background: rgba(79, 172, 254, 0.1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

nav a:hover {
  color: #ffffff;
  background: rgba(79, 172, 254, 0.2);
  border-color: rgba(79, 172, 254, 0.6);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(79, 172, 254, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Overlay for mobile menu */
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  z-index: 99;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.overlay.active {
  opacity: 1;
}

/* Main content */
main {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.hero-section {
  text-align: center;
  margin-bottom: 4rem;
  animation: fadeInDown 0.8s ease;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-section h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #fff 0%, #4facfe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-section p {
  font-size: 1.2rem;
  color: var(--text-secondary);
}

/* Cards Grid */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  animation: fadeInUp 0.8s ease 0.2s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: 24px;
  overflow: hidden;
  border: var(--border-glass);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-3);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: var(--shadow-glow);
  border-color: rgba(255, 255, 255, 0.3);
}

.card:nth-child(1)::before {
  background: var(--gradient-1);
}

.card:nth-child(2)::before {
  background: var(--gradient-2);
}

.card:nth-child(3)::before {
  background: var(--gradient-3);
}

.card:nth-child(4)::before {
  background: var(--gradient-4);
}

.card:nth-child(5)::before {
  background: var(--gradient-5);
}

.card:nth-child(6)::before {
  background: var(--gradient-1);
}

.card:nth-child(7)::before {
  background: var(--gradient-2);
}

.card a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.card-image {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
  position: relative;
}

.card img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.3));
  transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.card:hover img {
  transform: scale(1.1) rotate(-3deg);
}

.card-content {
  padding: 1.5rem;
  text-align: center;
  background: rgba(0, 0, 0, 0.2);
}

.card-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.card-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Footer */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
  margin-top: 4rem;
  color: var(--text-secondary);
  border-top: var(--border-glass);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  nav {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    height: 100vh;
    background: rgba(15, 12, 41, 0.98);
    backdrop-filter: blur(20px);
    padding: 5rem 2rem 2rem;
    transition: left 0.3s ease;
    z-index: 100;
    overflow-y: auto;
  }

  nav.active {
    left: 0;
  }

  nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }

  nav a {
    padding: 1rem 1.5rem;
    font-size: 1.1rem;
    border: 2px solid rgba(79, 172, 254, 0.3);
  }

  .hero-section h1 {
    font-size: 2.5rem;
  }

  .hero-section p {
    font-size: 1rem;
  }

  .grid-container {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
  }

  .card-image {
    height: 140px;
    padding: 1rem;
  }

  .card-title {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  header {
    padding: 1rem;
  }

  .logo {
    font-size: 1.5rem;
  }

  main {
    padding: 2rem 1rem;
  }

  .hero-section {
    margin-bottom: 2rem;
  }

  .hero-section h1 {
    font-size: 2rem;
  }

  .grid-container {
    grid-template-columns: 1fr;
  }
}