/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@600;700&family=JetBrains+Mono:wght@400;500&display=swap');

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

/* Root element - theme transition */
html {
  scroll-behavior: smooth;
}

html.theme-transitioning,
html.theme-transitioning * {
  transition: background-color 0.3s ease, 
              color 0.3s ease, 
              border-color 0.3s ease !important;
}

/* Body */
body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

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

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

a:hover {
  color: var(--accent-dim);
}

img,
iframe {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Main Container */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* Section Padding */
.section-padding {
  padding: var(--space-3xl) 0;
}

@media (max-width: 768px) {
  .section-padding {
    padding: var(--space-2xl) 0;
  }
}

/* Section Header */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2xl);
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  text-align: center;
  margin-top: calc(var(--space-md) * -1);
  margin-bottom: var(--space-2xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.section-link:hover {
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .section-title {
    font-size: var(--text-3xl);
  }
}

/* Section backgrounds */
.apod-section,
.featured-section,
.news-section,
.mars-rover-section {
  background-color: var(--bg-primary);
}

.exoplanet-section {
  background-color: var(--bg-secondary);
}

.stats-section {
  background-color: var(--bg-secondary);
}

/* Card backgrounds */
.data-card,
.news-card,
.mars-card,
.exoplanet-card,
.apod-container {
  background: var(--bg-card);
  border-color: var(--border);
}

.skeleton-card {
  background: var(--bg-card);
  border-color: var(--border);
}

/* Text colors in cards */
.card-title,
.news-card-title,
.mars-card-title,
.exoplanet-name {
  color: var(--text-primary);
}

.card-content,
.news-card-excerpt,
.data-label,
.detail-label {
  color: var(--text-secondary);
}

.data-value,
.detail-value {
  color: var(--text-primary);
}

/* Info banner */
.info-banner {
  background: var(--bg-tertiary);
  border-color: var(--border);
}

.info-banner p,
.info-banner strong {
  color: var(--text-secondary);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top-color: var(--border);
}

.footer-title {
  color: var(--text-primary);
}

.footer-text,
.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-bottom p {
  color: var(--text-tertiary);
}

/* Loading states */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--bg-secondary) 50%,
    var(--bg-tertiary) 75%
  );
}

/* Empty states */
.empty-state,
.error-state {
  background: var(--bg-card);
  border-color: var(--border);
}

.empty-state h3,
.error-state h3 {
  color: var(--text-primary);
}

.empty-state p,
.error-state p {
  color: var(--text-secondary);
}

/* Scrollbar styling (optional) */
::-webkit-scrollbar {
  width: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Selection color */
::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

::-moz-selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* Print styles */
@media print {
  body {
    background: white !important;
    color: black !important;
  }
  
  .nav-header,
  .footer,
  .theme-toggle,
  .mobile-toggle {
    display: none !important;
  }
}

/* ===================================
   LIGHT THEME COLOR ENFORCEMENT
=================================== */

[data-theme="light"] {
  /* CRITICAL: Force background colors */
  --bg-primary: #ffffff !important;
  --bg-secondary: #f9fafb !important;
  --bg-tertiary: #f3f4f6 !important;
  --bg-card: rgba(255, 255, 255, 0.9) !important;
  /* CRITICAL: Force text colors */
  --text-primary: #111827 !important;
  --text-secondary: #4b5563 !important;
  --text-tertiary: #9ca3af !important;
  /* CRITICAL: Force border colors */
  --border: rgba(0, 0, 0, 0.12) !important;
  --border-hover: rgba(0, 0, 0, 0.24) !important;
  /* Accent colors */
  --accent: #2563eb !important;
  --accent-dim: rgba(37, 99, 235, 0.7) !important;
  /* Status colors (light mode versions) */
  --success: #16a34a !important;
  --warning: #ea580c !important;
  --error: #dc2626 !important;
  --info: #0284c7 !important;
  /* Shadows for light mode */
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1) !important;
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1) !important;
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1) !important;
}

/* Force body colors */
[data-theme="light"] body {
  background-color: #ffffff !important;
  color: #111827 !important;
}

/* Force section backgrounds */
[data-theme="light"] .apod-section,
[data-theme="light"] .featured-section,
[data-theme="light"] .news-section,
[data-theme="light"] .mars-rover-section {
  background-color: #ffffff !important;
}

[data-theme="light"] .stats-section,
[data-theme="light"] .exoplanet-section {
  background-color: #f9fafb !important;
}

/* Force card backgrounds */
[data-theme="light"] .data-card,
[data-theme="light"] .news-card,
[data-theme="light"] .mars-card,
[data-theme="light"] .exoplanet-card,
[data-theme="light"] .mission-card,
[data-theme="light"] .event-card,
[data-theme="light"] .apod-container,
[data-theme="light"] .skeleton-card {
  background: rgba(255, 255, 255, 0.9) !important;
  border-color: rgba(0, 0, 0, 0.12) !important;
}

/* Force text colors in cards */
[data-theme="light"] .card-title,
[data-theme="light"] .news-card-title,
[data-theme="light"] .mars-card-title,
[data-theme="light"] .exoplanet-name,
[data-theme="light"] .mission-card-title,
[data-theme="light"] .event-card-title,
[data-theme="light"] .section-title,
[data-theme="light"] h1,
[data-theme="light"] h2,
[data-theme="light"] h3,
[data-theme="light"] h4 {
  color: #111827 !important;
}

[data-theme="light"] .card-content,
[data-theme="light"] .news-card-excerpt,
[data-theme="light"] .news-card-source,
[data-theme="light"] .data-label,
[data-theme="light"] .detail-label,
[data-theme="light"] .section-subtitle,
[data-theme="light"] p {
  color: #4b5563 !important;
}

/* Force footer colors */
[data-theme="light"] .footer {
  background: #f9fafb !important;
  border-top-color: rgba(0, 0, 0, 0.12) !important;
}

[data-theme="light"] .footer-title {
  color: #111827 !important;
}

[data-theme="light"] .footer-text,
[data-theme="light"] .footer-links a,
[data-theme="light"] .footer-bottom p {
  color: #4b5563 !important;
}

/* Force navigation colors */
[data-theme="light"] .nav-header {
  background: rgba(255, 255, 255, 0.95) !important;
  border-bottom-color: rgba(0, 0, 0, 0.12) !important;
}

[data-theme="light"] .nav-logo,
[data-theme="light"] .nav-link {
  color: #111827 !important;
}

[data-theme="light"] .nav-link:hover {
  color: #2563eb !important;
}

/* Force skeleton loader colors */
[data-theme="light"] .skeleton,
[data-theme="light"] .skeleton-image,
[data-theme="light"] .skeleton-text {
  background: linear-gradient(
    90deg,
    #f3f4f6 25%,
    #e5e7eb 50%,
    #f3f4f6 75%
  ) !important;
  background-size: 200% 100% !important;
}

/* Force hero section */
[data-theme="light"] .hero-section {
  background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%) !important;
}

[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #111827, #4b5563) !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  background-clip: text !important;
}

[data-theme="light"] .hero-subtitle {
  color: #4b5563 !important;
}

/* Prevent grey flash on transition */
html[data-theme="light"].theme-transitioning {
  background-color: #ffffff !important;
}

html[data-theme="light"].theme-transitioning body {
  background-color: #ffffff !important;
}