/* Base minimal styles for the static site */
* {
  box-sizing: border-box;
}
html {
  font-family: system-ui, Arial, sans-serif;
  line-height: 1.4;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  padding: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: #0f1115;
  color: #f5f7fa;
}

/* Header styles */
header {
  text-align: center;
  padding: 2rem 1rem 1rem;
  border-bottom: 1px solid #2d3748;
}

header h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin: 0 0 0.5rem;
  letter-spacing: 0.02em;
}

header p {
  margin: 0;
  font-size: 1rem;
  color: #b9c2cf;
}

/* Navigation styles */
nav {
  background: #1a202c;
  padding: 0.5rem 0;
  border-bottom: 1px solid #2d3748;
}

/* Hide navigation radio inputs and mobile toggle */
nav input[type="radio"],
#mobile-menu-toggle {
  display: none;
}

/* Hamburger menu button - hidden by default */
.hamburger-menu {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 0.5rem;
  background: none;
  border: none;
  position: relative;
  z-index: 100;
}

.hamburger-icon {
  position: relative;
  width: 24px;
  height: 3px;
  background: #e2e8f0;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-icon::before,
.hamburger-icon::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 3px;
  background: #e2e8f0;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-icon::before {
  top: -8px;
}

.hamburger-icon::after {
  top: 8px;
}

/* Hamburger animation when active */
#mobile-menu-toggle:checked ~ nav .hamburger-icon {
  background: transparent;
}

#mobile-menu-toggle:checked ~ nav .hamburger-icon::before {
  transform: rotate(45deg);
  top: 0;
}

#mobile-menu-toggle:checked ~ nav .hamburger-icon::after {
  transform: rotate(-45deg);
  top: 0;
}

.nav-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 2rem;
}

nav label {
  color: #e2e8f0;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 0.25rem;
  transition: background-color 0.2s;
  cursor: pointer;
  display: inline-block;
}

nav label:hover {
  background: #2d3748;
  color: #fff;
}

/* Active navigation state */
#nav-home:checked ~ nav .nav-menu li:nth-of-type(1) label,
#nav-about:checked ~ nav .nav-menu li:nth-of-type(2) label,
#nav-services:checked ~ nav .nav-menu li:nth-of-type(3) label,
#nav-contact:checked ~ nav .nav-menu li:nth-of-type(4) label {
  background: #2d3748;
  color: #fff;
}

/* Main content */
main {
  flex: 1;
  padding: 2rem 1rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* Content sections */
.content-section {
  display: none;
}

/* Show sections based on navigation radio state */
#nav-home:checked ~ main #home-section,
#nav-about:checked ~ main #about-section,
#nav-services:checked ~ main #services-section,
#nav-contact:checked ~ main #contact-section {
  display: block;
}

.section-content {
  background: #1a202c;
  padding: 2rem;
  border-radius: 0.5rem;
  min-height: 300px;
}

.section-content h2 {
  margin-top: 0;
  color: #e2e8f0;
  font-size: 1.5rem;
}

.section-content p {
  color: #cbd5e0;
  margin-bottom: 1rem;
}

.section-content ul {
  color: #cbd5e0;
  padding-left: 1.5rem;
}

.section-content li {
  margin-bottom: 0.5rem;
}

.section-content strong {
  color: #e2e8f0;
}

/* Tab styles */
.tabs {
  width: 100%;
}

.tabs input[type="radio"] {
  display: none;
}

.tabs label {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  margin-right: 0.25rem;
  background: #2d3748;
  color: #a0aec0;
  cursor: pointer;
  border-radius: 0.5rem 0.5rem 0 0;
  transition: all 0.2s;
}

.tabs label:hover {
  background: #4a5568;
  color: #e2e8f0;
}

.tabs input[type="radio"]:checked + label {
  background: #4299e1;
  color: #fff;
}

.tab-content {
  background: #1a202c;
  padding: 2rem;
  border-radius: 0 0.5rem 0.5rem 0.5rem;
  min-height: 300px;
}

.tab-panel {
  display: none;
}

.tabs input[type="radio"]:nth-of-type(1):checked ~ .tab-content #home-panel1,
.tabs input[type="radio"]:nth-of-type(2):checked ~ .tab-content #home-panel2,
.tabs input[type="radio"]:nth-of-type(3):checked ~ .tab-content #home-panel3 {
  display: block;
}

.tab-panel h2 {
  margin-top: 0;
  color: #e2e8f0;
  font-size: 1.5rem;
}

.tab-panel p {
  color: #cbd5e0;
  margin-bottom: 1rem;
}

.tab-panel ul {
  color: #cbd5e0;
  padding-left: 1.5rem;
}

.tab-panel li {
  margin-bottom: 0.5rem;
}

.tab-panel strong {
  color: #e2e8f0;
}

/* Contact section styles */
.contact-info,
.office-info {
  margin: 1rem 0;
  padding: 1rem;
  background: rgba(45, 55, 72, 0.3);
  border-radius: 0.5rem;
  border-left: 3px solid #4299e1;
}

/* Footer styles */
footer {
  background: #1a202c;
  padding: 1rem;
  text-align: center;
  border-top: 1px solid #2d3748;
  color: #8a94a3;
  font-size: 0.875rem;
}

/* Responsive design */
@media (max-width: 768px) {
  /* Show hamburger menu */
  .hamburger-menu {
    display: flex;
    position: relative;
    float: right;
    right: 1rem;
  }

  /* Hide navigation menu by default */
  .nav-menu {
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #1a202c;
    border-top: 1px solid #2d3748;
    padding: 1rem 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 50;
  }

  /* Show navigation menu when hamburger is checked */
  #mobile-menu-toggle:checked ~ nav .nav-menu {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  /* Make nav position relative for absolute positioning of menu */
  nav {
    position: relative;
  }

  main {
    padding: 1rem;
  }

  .tabs label {
    display: block;
    margin: 0 0 0.25rem 0;
    border-radius: 0.5rem;
  }

  .tab-content {
    border-radius: 0.5rem;
    padding: 1.5rem;
  }
}

/* Light prefers-color-scheme variant */
@media (prefers-color-scheme: light) {
  body {
    background: #f7f9fc;
    color: #1c2128;
  }

  header {
    border-bottom-color: #e2e8f0;
  }

  header p {
    color: #5a636e;
  }

  nav {
    background: #e2e8f0;
    border-bottom-color: #cbd5e0;
  }

  nav label {
    color: #2d3748;
  }

  nav label:hover {
    background: #cbd5e0;
    color: #1a202c;
  }

  /* Light theme hamburger icon */
  .hamburger-icon,
  .hamburger-icon::before,
  .hamburger-icon::after {
    background: #2d3748;
  }

  /* Light theme mobile menu */
  @media (max-width: 768px) {
    .nav-menu {
      background: #e2e8f0;
      border-top-color: #cbd5e0;
    }
  }

  #nav-home:checked ~ nav .nav-menu li:nth-of-type(1) label,
  #nav-about:checked ~ nav .nav-menu li:nth-of-type(2) label,
  #nav-services:checked ~ nav .nav-menu li:nth-of-type(3) label,
  #nav-contact:checked ~ nav .nav-menu li:nth-of-type(4) label {
    background: #cbd5e0;
    color: #1a202c;
  }

  .tabs label {
    background: #e2e8f0;
    color: #4a5568;
  }

  .tabs label:hover {
    background: #cbd5e0;
    color: #2d3748;
  }

  .tabs input[type="radio"]:checked + label {
    background: #3182ce;
    color: #fff;
  }

  .tab-content {
    background: #fff;
    border: 1px solid #e2e8f0;
  }

  .section-content {
    background: #fff;
    border: 1px solid #e2e8f0;
  }

  .tab-panel h2,
  .section-content h2 {
    color: #2d3748;
  }

  .tab-panel p,
  .tab-panel ul,
  .section-content p,
  .section-content ul {
    color: #4a5568;
  }

  .tab-panel strong,
  .section-content strong {
    color: #2d3748;
  }

  .contact-info,
  .office-info {
    background: rgba(226, 232, 240, 0.5);
    border-left-color: #3182ce;
  }

  footer {
    background: #e2e8f0;
    border-top-color: #cbd5e0;
    color: #697480;
  }
}