/* ─────────── Base ─────────── */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Kanit', sans-serif;
}

body {
  background: radial-gradient(circle at top, #10101a, #050509);
  color: #fff;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

/* ─────────── Navbar ─────────── */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 50px;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
  z-index: 100;
  box-shadow: 0 0 20px rgba(0,255,255,0.1);
}

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  color: #00ffff;
  text-shadow: 0 0 15px #00ffff99;
  text-decoration: none;
}

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

.nav-links a {
  color: #ddd;
  text-decoration: none;
  transition: 0.3s;
}

.nav-links a:hover {
  color: #00ffff;
}

/* ─────────── Sections ─────────── */
.section {
  padding: 120px 20px;
  text-align: center;
  min-height: 100vh;
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.section:nth-child(even) {
  background: rgba(255,255,255,0.03);
}

.section h2 {
  font-size: 2.2rem;
  color: #00ffff;
  margin-bottom: 1rem;
  text-shadow: 0 0 15px #00ffff88;
}

/* ─────────── Hero ─────────── */
.hero {
  background: url('https://i.ibb.co/MGz9mXy/mc-bg-blur.jpg') no-repeat center/cover;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hero-logo {
  width: 240px;
  height: auto;
  margin-bottom: 1.5rem;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hero h1 span {
  color: #00ffff;
  text-shadow: 0 0 25px #00ffffaa;
}

.hero p {
  color: #aaa;
  margin-bottom: 1.5rem;
}

/* ─────────── Features ─────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 15px;
  max-width: 900px;
  margin: 0 auto;
}

.feature {
  background: rgba(255,255,255,0.05);
  border-radius: 15px;
  padding: 15px;
  border: 1px solid rgba(255,255,255,0.1);
  transition: 0.3s;
  cursor: pointer;
}

.feature:hover {
  background: rgba(0,255,255,0.1);
  transform: translateY(-5px);
}

/* ─────────── Gallery ─────────── */
.gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.gallery img {
  width: 300px;
  height: 180px;
  border-radius: 15px;
  object-fit: cover;
  transition: 0.3s;
  cursor: pointer;
}

.gallery img:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px #00ffffaa;
}

/* ─────────── Buttons ─────────── */
.btn {
  display: inline-block;
  padding: 12px 25px;
  color: #000;
  background: linear-gradient(90deg, #00ffff, #00ffaa);
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  transition: 0.3s;
}

.btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 15px #00ffffaa;
}

/* ─────────── Fade-in ─────────── */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: all 1s ease-out;
}

.fade-in.appear {
  opacity: 1;
  transform: translateY(0);
}

/* ─────────── Footer ─────────── */
footer {
  padding: 20px;
  background: rgba(0,0,0,0.5);
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.9rem;
}

/* ─────────── Section BG Overlay ─────────── */
.section::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.4) blur(2px);
  z-index: -2;
  background-attachment: fixed;
}

.section::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at center, rgba(0,255,255,0.05), rgba(0,0,0,0.85));
  z-index: -1;
}

#home::before{background-image:url('img/hero.png');}
#about::before{background-image:url('img/about.png');}
#systems::before{background-image:url('img/system.png');}
#gallery::before{background-image:url('img/gallery.png');}
#join::before{background-image:url('img/join.png');}

/* ─────────── Popup ─────────── */
.popup {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.popup.show {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.popup img {
  width: 1200px;
  height: 675px;
  max-width: 95vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 10px;
  transform: scale(0.9);
  opacity: 0;
  transition: transform 0.4s ease, opacity 0.4s ease;
}

.popup.show img {
  transform: scale(1);
  opacity: 1;
}

#popup-controls button {
  padding: 8px 15px;
  font-size: 20px;
  cursor: pointer;
  border: none;
  border-radius: 5px;
  background: #00ffff;
  color: #000;
  font-weight: 600;
}

#close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 40px;
  color: white;
  cursor: pointer;
}

/* ─────────── Responsive ─────────── */
@media (max-width: 1200px) {
  .hero-logo { width: 200px; }
  .section h2 { font-size: 1.8rem; }
}

@media (max-width: 900px) {
  .navbar {
    padding: 15px 25px;
    flex-direction: column;
    gap: 10px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .gallery img {
    width: 90%;
    height: auto;
  }

  .popup img {
    width: 90%;
    height: auto;
  }
}

@media (max-width: 600px) {
  .hero h1 { font-size: 1.5rem; }
  .hero-logo { width: 150px; }
  .btn { padding: 10px 20px; }
  footer { font-size: 0.8rem; }
}