/* === VARIABLES === */
:root {
  --bg-color: #0e0e0e;
  --text-color: #fff;
  --card-bg: rgba(255,255,255,0.05);
  --border-color: #333;
  --accent: linear-gradient(90deg, #00fff7, #a855f7);
}

[data-theme="light"] {
  --bg-color: #f2f2f2;
  --text-color: #111;
  --card-bg: #fff;
  --border-color: #ccc;
}
/* Har element ka caret hide */
       
body {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
}

p, li {
  font-family: 'Inter', sans-serif;
  user-select: none; /* text select na ho */
}


/* === HEADER === */
header {
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 999;
}

header h1 {
  font-size: 1.8rem;
  background: var(--accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  user-select: none; /* text select na ho */
}

nav {
  position: relative;
}

.nav-links {
  display: flex;
  gap: 25px;
  list-style: none;
}

.nav-links li a {
  color: white;
  text-decoration: none;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  transition: color 0.3s ease;
}

.nav-links li a:hover {
  color: var(--accent);
}

/* === HAMBURGER === */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
  transition: 0.4s ease;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 60px;
    right: 0;
    flex-direction: column;
    background: #1c1c1c;
    box-shadow: -2px 12px 24px rgba(0, 0, 0, 0.5);
    border-radius: 10px 0 10px 10px;
    padding: 20px;
    display: none;
    min-width: 160px;
    animation: slideDown 0.4s ease forwards;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    margin-bottom: 15px;
  }

  .nav-links li:last-child {
    margin-bottom: 0;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* === COMMON ELEMENTS === */
section {
  padding: 80px 20px;
  text-align: center;
}

h2 {
  background: var(--accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 1.9rem;
  user-select: none; /* text select na ho */
}

.btn-main {
  background: #00ffe1; /* solid sky blue */
  border: none;
  padding: 9px 12px;
  border-radius: 20px;
  color: #000;
  font-weight: bold;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(135, 206, 235, 0.6);
  transition: transform 0.3s ease;
}

.btn-main:hover {
  transform: scale(1.05);
}


.grid {
  display: grid;
  gap: 24px;
  margin-top: 40px;
}

.grid-3 { grid-template-columns: repeat(1, 1fr); }
.grid-4 { grid-template-columns: repeat(1, 1fr); }

@media (min-width: 600px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 30px;
  backdrop-filter: blur(10px);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 255, 255, 0.2);
}

footer {
  text-align: center;
  padding: 40px 20px;
  color: #777;
  border-top: 1px solid var(--border-color);
  background: rgba(255,255,255,0.02);
}