/* style.css */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #0b0d12;
  font-family: 'Inter', sans-serif;
  color: #f0f4ff;
  line-height: 1.5;
  overflow-x: hidden;
}

/* canvas background (snow / stars) */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.container {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* GLOW / NEON */
.glow-text {
  text-shadow: 0 0 8px rgba(140, 200, 255, 0.3), 0 0 20px rgba(100, 180, 255, 0.15);
}
.glow-border {
  box-shadow: 0 0 12px rgba(120, 200, 255, 0.2), 0 0 30px rgba(80, 160, 255, 0.05);
}

/* HEADER / NAV */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.8rem 0 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(2px);
  flex-wrap: wrap;
}
.logo {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #b0e0ff, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(150, 180, 255, 0.2);
  cursor: default;
}
.nav-links {
  display: flex;
  gap: 2.8rem;
  font-weight: 400;
  color: #b6c8e0;
  letter-spacing: 0.01em;
  font-size: 0.95rem;
  flex-wrap: wrap;
}
.nav-links a {
  color: #b6c8e0;
  text-decoration: none;
  transition: 0.2s;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.nav-links a:hover {
  color: #e6f0ff;
  text-shadow: 0 0 12px rgba(160, 200, 255, 0.4);
  border-bottom: 1px solid rgba(160, 200, 255, 0.25);
}

/* HERO */
.hero {
  padding: 7rem 0 6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  animation: fadeUp 1.2s ease-out forwards;
  opacity: 0;
}
@keyframes fadeUp {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}

.hero h1 {
  font-size: clamp(4.2rem, 18vw, 7.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #ffffff 0%, #b3d9ff 45%, #c5b4ff 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.6rem;
  text-shadow: 0 0 60px rgba(80, 160, 255, 0.15);
  line-height: 1.1;
}

.hero .tagline {
  font-size: 1.5rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: #c8daff;
  text-shadow: 0 0 30px rgba(100, 180, 255, 0.15);
  margin-bottom: 2.5rem;
  background: rgba(255, 255, 255, 0.02);
  padding: 0.5rem 2rem;
  border-radius: 60px;
  backdrop-filter: blur(2px);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.hero .cta-btn {
  background: transparent;
  border: 1.5px solid rgba(180, 215, 255, 0.5);
  padding: 1rem 3.5rem;
  border-radius: 80px;
  font-size: 1.3rem;
  font-weight: 600;
  color: #edf6ff;
  letter-spacing: 0.08em;
  backdrop-filter: blur(4px);
  background: rgba(20, 40, 70, 0.2);
  transition: all 0.3s ease;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(80, 180, 255, 0.05);
  text-transform: uppercase;
  font-family: 'Inter', sans-serif;
  margin-top: 1rem;
  text-decoration: none;
  display: inline-block;
}
.hero .cta-btn:hover {
  background: rgba(140, 200, 255, 0.08);
  border-color: #a0d0ff;
  box-shadow: 0 0 40px rgba(100, 190, 255, 0.3), 0 0 80px rgba(80, 150, 255, 0.1);
  transform: scale(1.02);
  color: #ffffff;
  text-shadow: 0 0 20px rgba(160, 210, 255, 0.5);
}

/* ABOUT */
.about {
  padding: 5rem 0 4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.02);
  animation: fadeUp 1s ease-out forwards;
  opacity: 0;
  animation-delay: 0.15s;
}
.about h2 {
  font-size: 2.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #eef6ff, #b7c9ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}
.about p {
  max-width: 700px;
  font-size: 1.2rem;
  font-weight: 300;
  color: #b8cbeb;
  line-height: 1.8;
  letter-spacing: 0.01em;
  border-left: 3px solid rgba(160, 200, 255, 0.2);
  padding-left: 2rem;
  text-shadow: 0 0 20px rgba(80, 140, 255, 0.05);
}

/* FEATURES */
.features {
  padding: 5rem 0 5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.02);
  animation: fadeUp 1s ease-out forwards;
  opacity: 0;
  animation-delay: 0.3s;
}

.feature-card {
  background: rgba(16, 26, 42, 0.45);
  backdrop-filter: blur(6px);
  padding: 2.5rem 1.8rem;
  border-radius: 32px;
  border: 1px solid rgba(180, 215, 255, 0.08);
  transition: all 0.25s ease;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 30%, rgba(120, 200, 255, 0.02), transparent 70%);
  opacity: 0;
  transition: 0.6s;
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-card:hover {
  border-color: rgba(160, 200, 255, 0.25);
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(60, 140, 255, 0.12), 0 0 30px rgba(120, 190, 255, 0.05);
}

.feature-card .icon {
  font-size: 2.8rem;
  margin-bottom: 1.2rem;
  display: block;
  filter: drop-shadow(0 0 12px rgba(140, 200, 255, 0.2));
}
.feature-card h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  letter-spacing: -0.01em;
  color: #e6f0ff;
}
.feature-card p {
  color: #a5bddb;
  font-weight: 300;
  font-size: 0.98rem;
  line-height: 1.6;
  opacity: 0.9;
}

/* CTA SECTION */
.cta-section {
  padding: 5rem 0 6rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.02);
  animation: fadeUp 1s ease-out forwards;
  opacity: 0;
  animation-delay: 0.45s;
}
.cta-section h2 {
  font-size: 2.6rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, #f0f8ff, #b7c9ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cta-section .cta-large {
  background: transparent;
  border: 1.5px solid rgba(180, 215, 255, 0.4);
  padding: 1.2rem 4.2rem;
  border-radius: 100px;
  font-size: 1.5rem;
  font-weight: 600;
  color: #edf6ff;
  letter-spacing: 0.12em;
  backdrop-filter: blur(6px);
  background: rgba(12, 28, 50, 0.3);
  transition: all 0.35s ease;
  cursor: pointer;
  box-shadow: 0 0 30px rgba(80, 180, 255, 0.05);
  text-transform: uppercase;
  font-family: 'Inter', sans-serif;
  margin-top: 0.5rem;
  text-decoration: none;
  display: inline-block;
}
.cta-section .cta-large:hover {
  background: rgba(140, 200, 255, 0.07);
  border-color: #9acbff;
  box-shadow: 0 0 60px rgba(100, 190, 255, 0.25), 0 0 120px rgba(80, 150, 255, 0.08);
  transform: scale(1.02);
  color: #ffffff;
  text-shadow: 0 0 30px rgba(160, 210, 255, 0.4);
}

/* CONTACT / SOCIAL */
.contact-section {
  padding: 4rem 0 5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.02);
  animation: fadeUp 1s ease-out forwards;
  opacity: 0;
  animation-delay: 0.5s;
  text-align: center;
}
.contact-section h2 {
  font-size: 2.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, #eef6ff, #b7c9ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.contact-section p {
  color: #b0c6e0;
  font-weight: 300;
  font-size: 1.1rem;
  margin-bottom: 2.2rem;
}
.social-links {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.social-links a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: #c8daff;
  text-decoration: none;
  font-weight: 400;
  font-size: 1.1rem;
  padding: 0.6rem 1.6rem;
  border-radius: 60px;
  border: 1px solid rgba(180, 215, 255, 0.08);
  background: rgba(16, 26, 42, 0.3);
  backdrop-filter: blur(4px);
  transition: all 0.25s ease;
  letter-spacing: 0.02em;
}
.social-links a:hover {
  border-color: rgba(160, 200, 255, 0.3);
  background: rgba(140, 200, 255, 0.05);
  box-shadow: 0 0 30px rgba(100, 190, 255, 0.1);
  transform: translateY(-2px);
  color: #ffffff;
  text-shadow: 0 0 20px rgba(160, 210, 255, 0.2);
}
.social-links .social-icon {
  font-size: 1.6rem;
  line-height: 1;
}

/* FOOTER */
.footer {
  padding: 2.5rem 0 1.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.02);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  color: #7e92b0;
  font-weight: 300;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}
.footer a {
  color: #7e92b0;
  text-decoration: none;
  transition: 0.2s;
}
.footer a:hover {
  color: #b0c8e5;
  text-shadow: 0 0 12px rgba(160, 200, 255, 0.15);
}
.footer span {
  opacity: 0.6;
}

/* scroll hint */
.scroll-hint {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: #5a6f8a;
  letter-spacing: 0.15em;
  animation: pulseOpacity 2.5s infinite;
}
@keyframes pulseOpacity {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.7; }
}

/* floating glow accent */
.glow-orb {
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(100, 180, 255, 0.04), transparent 70%);
  border-radius: 50%;
  top: -100px;
  right: -80px;
  z-index: 0;
  pointer-events: none;
  filter: blur(40px);
}
.relative-wrap {
  position: relative;
  overflow: hidden;
}

/* RESPONSIVE */
@media (max-width: 700px) {
  .container { padding: 0 1.2rem; }
  .navbar { flex-direction: column; gap: 0.8rem; padding: 1.2rem 0; }
  .nav-links { gap: 1.8rem; font-size: 0.9rem; justify-content: center; }
  .hero { padding: 4rem 0 3rem; }
  .hero .tagline { font-size: 1rem; letter-spacing: 0.15em; padding: 0.4rem 1.2rem; }
  .hero .cta-btn { padding: 0.8rem 2.2rem; font-size: 1.0rem; }
  .about p { font-size: 1rem; padding-left: 1rem; }
  .features { grid-template-columns: 1fr; gap: 1.8rem; }
  .cta-section h2 { font-size: 2rem; }
  .cta-section .cta-large { padding: 1rem 2rem; font-size: 1.2rem; }
  .social-links { gap: 1.2rem; }
  .social-links a { padding: 0.5rem 1.2rem; font-size: 0.95rem; }
  .footer { flex-direction: column; align-items: center; gap: 0.8rem; text-align: center; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 3.4rem; }
  .hero .tagline { font-size: 0.85rem; letter-spacing: 0.1em; }
  .feature-card { padding: 1.8rem 1rem; }
}