:root {
  --main-bg: #18222b;
  --accent: #6da9c2;
  --text: #e3e9ef;
  --card-bg: #202c37;
  --alt-bg: #232f3b;
  --primary: #6da9c2;
  --btn-hover: #4489a7;
  --shadow: 0 4px 32px rgba(0,0,0,0.18);
  --orbitron: 'Orbitron', 'Roboto', Arial, sans-serif;
  --roboto: 'Roboto', Arial, sans-serif;
}

/* Reset & Base */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--main-bg);
  color: var(--text);
  font-family: var(--roboto);
  line-height: 1.6;
}
a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
.container {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 8px;
}

/* Header & Navigation */
header {
  width: 100%;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}
.logo-title {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo {
  height: 48px;
  width: 48px;
  object-fit: contain;
  border-radius: 10px;
  background: #10171d;
}
.site-title, .footer-logo span {
  font-family: var(--orbitron);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary);
  text-transform: uppercase;
}
nav {
  display: flex;
  align-items: center;
}
.nav-list {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  color: var(--text);
  font-weight: 500;
  font-size: 1.07rem;
  position: relative;
  transition: color 0.2s;
}
.nav-link:after {
  content: '';
  display: block;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .3s;
  margin-top: 2px;
}
.nav-link:hover:after { width: 100%; }
.nav-link:hover { color: var(--accent); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--primary);
  font-size: 2rem;
  margin-left: 1.5rem;
  cursor: pointer;
}

@media (max-width: 900px) {
  .nav-list {
    position: absolute;
    top: 72px;
    right: 0;
    flex-direction: column;
    background: var(--card-bg);
    width: 220px;
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
    border-radius: 0 0 0 14px;
    gap: 0;
    display: none;
    z-index: 999;
  }
  .nav-list.active { display: flex; }
  .nav-link {
    padding: 1rem 2rem;
    font-size: 1.1rem;
  }
  .nav-toggle { display: block; }
}

/* Hero Section */
.hero {
  position: relative;
  width: 100%;
  min-height: 60vh;
  height: 80vh;
  background: url('images/hero-image.png') center center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0;
  overflow: hidden;
}
.hero-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  width: 100%;
  height: 100%;
  background: rgba(24,34,43,0.68); /* dark overlay for readability */
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}
.hero-content {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  color: #e3e9ef;
  z-index: 2;
  padding: 0 20px;
}
.hero h1 {
  font-size: 2.7rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 18px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.4);
  letter-spacing: 1px;
}
.hero p {
  color: #e3e9ef;
  font-size: 1.25rem;
  margin-bottom: 32px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.hero .btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 13px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1.07rem;
  border: none;
  box-shadow: 0 2px 8px rgba(109,169,194,0.13);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
  text-align: center;
}
.hero .btn:hover { background: var(--btn-hover); }

/* Section Styles */
.section { padding: 70px 0 50px 0; }
.section-title {
  text-align: center;
  font-size: 2rem;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 38px;
  letter-spacing: 1px;
}
.alt-bg { background: var(--alt-bg); }

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}
.card {
  background: var(--card-bg);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 2.2rem 1.3rem 1.5rem 1.3rem;
  text-align: center;
  transition: transform 0.18s;
}
.card:hover { transform: translateY(-8px) scale(1.03); }
.card-icon {
  font-size: 2.8rem;
  color: var(--primary);
  margin-bottom: 18px;
}
.card h3 {
  color: var(--primary);
  font-size: 1.25rem;
  margin-bottom: 10px;
  font-weight: 700;
}
.card p { color: var(--text); font-size: 1rem; }

/* About Section */
.about-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 40px;
  justify-content: space-between;
}
.about-text { flex: 2 1 320px; }
.about-img-wrap {
  flex: 1 1 160px;
  display: flex;
  justify-content: center;
}
.about-img {
  width: 120px;
  height: 120px;
  object-fit: contain;
  background: #10171d;
  border-radius: 50%;
  box-shadow: var(--shadow);
}
.about-highlight {
  color: var(--primary);
  font-weight: 600;
  font-size: 1.1rem;
}

/* Contact Section */
.contact-content {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: space-between;
  align-items: flex-start;
}
.contact-info {
  flex: 1 1 220px;
  min-width: 220px;
  max-width: 350px;
}
.contact-info h2 {
  color: var(--primary);
  font-size: 1.5rem;
  margin-bottom: 12px;
  font-family: var(--orbitron);
  letter-spacing: 1px;
}
.contact-info p {
  font-size: 1.08rem;
  color: var(--text);
  margin-bottom: 18px;
}
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.contact-list li {
  margin-bottom: 12px;
  color: var(--text);
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.contact-list i {
  color: var(--primary);
  font-size: 1.15rem;
}

/* Contact Form */
.contact-form {
  flex: 1 1 320px;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 15px;
  background: var(--card-bg);
  border-radius: 14px;
  padding: 32px 24px 28px 24px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.08);
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 7px;
  border: none;
  background: #1c2935;
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 2px;
  resize: none;
  transition: box-shadow 0.2s;
  box-shadow: 0 1px 4px rgba(109,169,194,0.07);
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--primary);
  box-shadow: 0 2px 8px rgba(109,169,194,0.13);
}
.contact-form textarea {
  min-height: 110px;
  max-height: 250px;
}
.contact-form button {
  display: block;
  width: 100%;
  max-width: 300px;
  margin: 20px auto 0 auto;
  padding: 12px 28px;
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  background-color: var(--primary);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(109,169,194,0.13);
  transition: background-color 0.3s ease;
  text-align: center;
  text-decoration: none;
  letter-spacing: 1px;
}
.contact-form button:hover { background-color: #4489a7; }

/* Footer */
footer {
  background: var(--card-bg);
  padding: 32px 0 18px 0;
  color: var(--text);
  text-align: center;
}
.footer-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary);
}
.footer-logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 7px;
  background: #10171d;
}
.footer-links {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}
.footer-link {
  color: var(--text);
  text-decoration: none;
  font-size: 1rem;
  transition: color 0.2s;
}
.footer-link:hover { color: var(--primary); }
.footer-copy {
  flex: 1 1 100%;
  margin-top: 12px;
  color: #a9b6c7;
  font-size: 0.98rem;
}

/* Back to Top Button */
#backToTop {
  display: none;
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 1001;
  background: var(--primary);
  color: #fff;
  border: none;
  outline: none;
  padding: 14px 18px;
  border-radius: 50%;
  font-size: 1.3rem;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(109,169,194,0.13);
  transition: background 0.2s;
}
#backToTop:hover { background: var(--btn-hover); }

/* Responsive Design */
@media (max-width: 900px) {
  .hero-content,
  .about-content,
  .contact-content,
  .footer-content {
    flex-direction: column;
    gap: 30px;
    align-items: center;
  }
  .hero-img, .about-img {
    margin: 0 auto;
  }
  .nav-list {
    width: 100vw;
    right: 0;
    left: 0;
    border-radius: 0 0 14px 14px;
  }
  .contact-info, .contact-form {
    max-width: 100%;
    width: 100%;
  }
  .contact-form {
    padding: 24px 8px 18px 8px;
  }
}
@media (max-width: 600px) {
  .container { width: 98%; padding: 0 2px; }
  .hero { padding: 70px 0 28px 0; }
  .hero-content > div { text-align: center; }
  .hero h1 { font-size: 1.1rem; }
  .hero p { font-size: 1rem; }
  .section-title { font-size: 1.3rem; }
  .card { padding: 1.2rem 0.7rem 1rem 0.7rem; }
  .about-img, .hero-img { width: 90px; height: 90px; }
  .footer-links { gap: 0.7rem; }
  .nav-list { top: 60px; }
  .contact-form { padding: 14px 2px 10px 2px; }
  .contact-form button {
    font-size: 1rem;
    padding: 10px 16px;
  }
}

/* Accessibility: Focus Styles */
a:focus, button:focus, input:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}