@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
  --primary: #7f5cff;
  --secondary: #00e5ff;
  --bg: #070910;
  --text: #ffffff;
  --glass: rgba(255,255,255,0.08);
  --border: rgba(255,255,255,0.15);
}

body.light {
  --bg: #f5f7ff;
  --text: #0b0f1a;
  --glass: rgba(0,0,0,0.05);
  --border: rgba(0,0,0,0.15);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: radial-gradient(circle at top, #1b1f3b, var(--bg));
  color: var(--text);
  overflow-x: hidden;
  transition: background 0.6s, color 0.6s;
}

/* ===== PAGE TRANSITION ===== */
.page {
  animation: fadeIn 0.8s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== NAVBAR ===== */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 20px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(15px);
  background: rgba(0,0,0,0.45);
  z-index: 1000;
}

nav h1 {
  font-size: 24px;
  font-weight: 700;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

nav a {
  color: var(--text);
  text-decoration: none;
  margin-left: 25px;
  opacity: 0.85;
}

nav a:hover {
  opacity: 1;
}

/* ===== TOGGLE ===== */
.toggle {
  cursor: pointer;
  padding: 8px 16px;
  border-radius: 30px;
  background: var(--glass);
  border: 1px solid var(--border);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 20px;
}

.hero h2 {
  font-size: 64px;
  line-height: 1.1;
}

.hero span {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -Webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  margin-top: 25px;
  font-size: 20px;
  opacity: 0.8;
}

/* ===== SECTIONS ===== */
section {
  padding: 120px 80px;
}

.section-title {
  text-align: center;
  font-size: 44px;
  margin-bottom: 60px;
}

/* ===== CARDS (3D) ===== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 26px;
  padding: 40px;
  backdrop-filter: blur(20px);
  transition: transform 0.4s, box-shadow 0.4s;
  transform-style: preserve-3d;
}

.card:hover {
  transform: rotateY(8deg) rotateX(8deg) translateY(-10px);
  box-shadow: 0 40px 80px rgba(0,0,0,0.5);
}

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ===== FORM ===== */
form {
  max-width: 600px;
  margin: auto;
}

input, textarea {
  width: 100%;
  padding: 16px;
  margin-bottom: 20px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--glass);
  color: var(--text);
}

button {
  padding: 16px 40px;
  border-radius: 50px;
  border: none;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  cursor: pointer;
}

/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 60px 20px;
  opacity: 0.7;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  nav { padding: 20px; }
  section { padding: 100px 30px; }
  .hero h2 { font-size: 42px; }
}