/* ======================================================
   GLOBAL RESET & BASE STYLES
   Purpose: Remove default browser spacing and set base font
====================================================== */
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

/* ======================================================
   HEADER / NAVIGATION (GLOBAL)
   Shared across all pages
====================================================== */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
  background: #0f0f0f;
  border-bottom: 1px solid #2a2a2a;
}

/* Logo highlight */
.logo span {
  color: #f1c40f;
  font-size: 1.3rem;
  font-weight: 600;
}

/* Navigation container */
.main-nav {
  display: flex;
  gap: 30px;
}

/* Navigation links */
.main-nav a {
  color: #e6e6e6;
  text-decoration: none;
}

/* Active page indicator */
.main-nav a.active {
  color: #f1c40f;
}

/* Hover effect */
.main-nav a:hover {
  color: #f1c40f;
}

/* ======================================================
   FOOTER (GLOBAL)
====================================================== */
.site-footer {
  margin-top: 80px;
  padding: 25px 15px;
  background: #0f0f0f;
  text-align: center;
}

.footer-logo img {
  width: 32px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
}

/* ======================================================
   BACK TO TOP BUTTON (GLOBAL)
====================================================== */
#backToTop {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: none;
  background: #f1c40f;
  color: #0f0f0f;
  font-size: 18px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
  transition: transform 0.25s ease, opacity 0.25s ease;
  z-index: 999;
}

#backToTop.show {
  display: flex;
}

#backToTop:hover {
  transform: translateY(-4px);
}

.footer-sub {
  color: #f1c40f;
}

/* ======================================================
   RESPONSIVE HEADER & FOOTER
====================================================== */
@media (max-width: 768px) {
  .site-header {
    flex-direction: column;
    gap: 12px;
    padding: 16px 20px;
  }

  .main-nav {
    gap: 18px;
  }
}

@media (max-width: 480px) {
  .main-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .main-nav a {
    font-size: 0.95rem;
  }

  .footer-logo img {
    width: 26px;
  }
}