/* CSS Custom Properties - Light Theme (default) */
:root {
  --color-bg: #faf9f7;
  --color-bg-alt: #f0efe9;
  --color-text: #2c3e2d;
  --color-text-muted: #5a6b5c;
  --color-primary: #2d5a27;
  --color-primary-hover: #3d7a37;
  --color-secondary: #4a7c43;
  --color-accent: #6b9d64;
  --color-border: #d4d9d4;
  --color-header-bg: #2d5a27;
  --color-header-text: #ffffff;
  --color-footer-bg: #2c3e2d;
  --color-footer-text: #e8ebe8;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --transition: 0.3s ease;
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg: #1a2318;
  --color-bg-alt: #243021;
  --color-text: #e8ebe8;
  --color-text-muted: #a8b5a8;
  --color-primary: #6b9d64;
  --color-primary-hover: #7db876;
  --color-secondary: #4a7c43;
  --color-accent: #8bc084;
  --color-border: #3d4f3a;
  --color-header-bg: #1f2d1c;
  --color-header-text: #e8ebe8;
  --color-footer-bg: #151d13;
  --color-footer-text: #c8d1c8;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition), color var(--transition);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5em;
  color: var(--color-text);
}

h1 { font-size: clamp(1.75rem, 1.5rem + 1.25vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem); }
h3 { font-size: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem); }

p {
  margin-bottom: 1em;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

ul, ol {
  margin-bottom: 1em;
  padding-left: 1.5em;
}

li {
  margin-bottom: 0.25em;
}

/* Header */
.site-header {
  background-color: var(--color-header-bg);
  color: var(--color-header-text);
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-header-text);
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
}

.site-logo:hover {
  color: var(--color-header-text);
  text-decoration: none;
}

.logo-icon {
  font-size: 1.5rem;
}

/* Navigation */
.site-nav {
  display: none;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  padding: 0;
  margin: 0;
}

.nav-list a {
  color: var(--color-header-text);
  padding: 0.5rem 0;
  display: block;
  font-weight: 500;
  transition: opacity var(--transition);
}

.nav-list a:hover {
  opacity: 0.8;
  text-decoration: none;
}

/* Hamburger Menu */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 30px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-header-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Navigation Panel */
.site-nav.is-open {
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-header-bg);
  padding: 5rem 2rem 2rem;
  overflow-y: auto;
  animation: slideIn 0.3s ease;
}

.site-nav.is-open .nav-list {
  flex-direction: column;
  gap: 0.5rem;
}

.site-nav.is-open .nav-list a {
  font-size: 1.25rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 2px solid var(--color-header-text);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.theme-icon {
  font-size: 1.25rem;
}

.theme-icon-dark {
  display: none;
}

[data-theme="dark"] .theme-icon-light {
  display: none;
}

[data-theme="dark"] .theme-icon-dark {
  display: block;
}

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

/* Page Styles */
.page,
.post {
  max-width: 800px;
  margin: 0 auto;
}

.page-header,
.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--color-border);
}

.page-content,
.post-content {
  line-height: 1.8;
}

.post-meta {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.post-author {
  margin-left: 0.5rem;
}

.post-footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.back-link {
  font-weight: 500;
}

/* Homepage */
.home {
  text-align: center;
}

.home-hero {
  padding: 3rem 0;
  margin-bottom: 3rem;
}

.home-title {
  font-size: clamp(2rem, 1.5rem + 2vw, 3rem);
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.home-subtitle {
  font-size: clamp(1.25rem, 1rem + 1vw, 1.75rem);
  color: var(--color-text-muted);
  font-weight: 400;
}

.home-intro {
  max-width: 700px;
  margin: 0 auto 3rem;
  font-size: 1.1rem;
}

.home-features {
  display: grid;
  gap: 2rem;
  margin-bottom: 3rem;
}

.feature-card {
  background-color: var(--color-bg-alt);
  padding: 2rem;
  border-radius: 8px;
  text-align: left;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-card h3 {
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.cta-section {
  background-color: var(--color-bg-alt);
  padding: 3rem 2rem;
  border-radius: 8px;
  margin-top: 2rem;
}

.cta-button {
  display: inline-block;
  background-color: var(--color-primary);
  color: white;
  padding: 0.75rem 2rem;
  border-radius: 4px;
  font-weight: 600;
  transition: background-color var(--transition);
}

.cta-button:hover {
  background-color: var(--color-primary-hover);
  color: white;
  text-decoration: none;
}

/* Blog Listing */
.blog-list {
  list-style: none;
  padding: 0;
}

.blog-item {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.blog-item:last-child {
  border-bottom: none;
}

.blog-item h2 {
  margin-bottom: 0.25rem;
}

.blog-item h2 a {
  color: var(--color-text);
}

.blog-item h2 a:hover {
  color: var(--color-primary);
}

.blog-item .post-meta {
  margin-bottom: 0.75rem;
}

.blog-excerpt {
  color: var(--color-text-muted);
}

/* Footer */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 2rem 1rem;
  margin-top: auto;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  text-align: center;
}

.footer-callsign {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
}

.footer-name {
  font-weight: 600;
}

.footer-contact a {
  color: var(--color-footer-text);
}

.footer-contact a:hover {
  color: var(--color-accent);
}

.footer-copyright {
  font-size: 0.875rem;
  opacity: 0.8;
}

.footer-copyright p {
  margin-bottom: 0.25rem;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

th, td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  background-color: var(--color-bg-alt);
  font-weight: 600;
}

/* Responsive - Tablet & Desktop */
@media (min-width: 768px) {
  .hamburger {
    display: none;
  }

  .site-nav {
    display: block;
  }

  .header-container {
    flex-wrap: wrap;
  }

  .site-nav {
    order: 3;
    width: 100%;
    margin-top: 0.5rem;
  }

  .nav-list {
    justify-content: center;
  }

  .home-features {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

@media (min-width: 1024px) {
  .header-container {
    flex-wrap: nowrap;
  }

  .site-nav {
    order: 0;
    width: auto;
    margin-top: 0;
    flex: 1;
    display: flex;
    justify-content: center;
  }

  .home-features {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Utility Classes */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Print Styles */
@media print {
  .site-header,
  .site-footer,
  .theme-toggle,
  .hamburger {
    display: none;
  }

  .main-content {
    max-width: none;
    padding: 0;
  }

  body {
    background: white;
    color: black;
  }
}