:root {
  /* Color variables */
  --color-background: #343A40;
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #E9ECEF;
  --color-text-tertiary: #CED4DA;
  --color-accent: #0071e3;
  --color-accent-light: #3394ea;
  --color-border: #495057;
  --color-shadow: rgba(0, 0, 0, 0.25);
  
  /* Spacing system (8px base) */
  --space-1: 0.5rem;   /* 8px */
  --space-2: 1rem;     /* 16px */
  --space-3: 1.5rem;   /* 24px */
  --space-4: 2rem;     /* 32px */
  --space-5: 2.5rem;   /* 40px */
  --space-6: 3rem;     /* 48px */
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --line-height-body: 1.5;
  --line-height-heading: 1.2;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: var(--line-height-body);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
}

#app {
  min-height: 100vh;
  width: 100%;
}

/* Navigation Styles */
.navbar {
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-3);
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-1);
  cursor: pointer;
}

.menu-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  position: relative;
  transition: background-color 0.3s;
}

.menu-icon::before,
.menu-icon::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: transform 0.3s;
}

.menu-icon::before {
  top: -6px;
}

.menu-icon::after {
  bottom: -6px;
}

.menu-toggle.active .menu-icon {
  background-color: transparent;
}

.menu-toggle.active .menu-icon::before {
  transform: rotate(45deg) translate(4px, 4px);
}

.menu-toggle.active .menu-icon::after {
  transform: rotate(-45deg) translate(4px, -4px);
}

.nav-items {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.nav-button {
  background: none;
  border: none;
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-family);
  font-size: 1rem;
  color: var(--color-text-primary);
  cursor: pointer;
  border-radius: 6px;
  transition: background-color 0.2s;
  text-decoration: none;
}

.nav-button:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--color-background);
  min-width: 160px;
  box-shadow: 0 2px 10px var(--color-shadow);
  border-radius: 6px;
  padding: var(--space-1) 0;
  z-index: 1000;
}

.dropdown:hover .dropdown-content {
  display: block;
}

.dropdown-item {
  display: block;
  padding: var(--space-1) var(--space-2);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: background-color 0.2s;
}

.dropdown-item:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--space-3);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--line-height-heading);
  margin-bottom: var(--space-2);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-1);
}

h2 {
  font-size: 2rem;
  margin-top: var(--space-4);
}

h3 {
  font-size: 1.5rem;
  margin-top: var(--space-3);
}

h4 {
  font-size: 1.25rem;
  margin-top: var(--space-3);
}

p {
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
}

.subtitle {
  font-size: 1.25rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

/* Header and Footer */
header {
  padding: var(--space-3) 0;
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

footer {
  padding: var(--space-3) 0;
  margin-top: var(--space-4);
  text-align: center;
  color: var(--color-text-tertiary);
  border-top: 1px solid var(--color-border);
}

/* Image details section */
.image-details {
  margin-top: var(--space-4);
  padding: var(--space-3);
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  border-left: 3px solid var(--color-accent);
}

.image-details h4 {
  margin-top: 0;
  color: var(--color-accent);
}

.image-details p {
  margin-bottom: var(--space-1);
}

#image-location-text, #image-photographer-name {
  font-weight: 600;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-items {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-background);
    padding: var(--space-2);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-items.active {
    display: flex;
  }

  .dropdown {
    width: 100%;
  }

  .dropdown-content {
    position: static;
    box-shadow: none;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    margin: var(--space-1) 0;
  }

  .nav-button {
    width: 100%;
    text-align: left;
  }
}