/* CSS Variables & Theme */
:root {
  /* Colors */
  --bg-color: #050505;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --accent-primary: #00f3ff; /* Cyan */
  --accent-secondary: #ff0055; /* Magenta */
  
  /* Surfaces */
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.1);
  --glass-blur: 10px;
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'Roboto Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 32px;
  --spacing-xl: 64px;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(0, 243, 255, 0.1) 0%, transparent 20%),
    radial-gradient(circle at 90% 80%, rgba(255, 0, 85, 0.1) 0%, transparent 20%);
}

/* Layout */
main {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  width: 100%;
}

header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

h1 {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* Hero Section */
.hero-clock {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-xl) 0;
}

.hero-value {
  font-family: var(--font-mono);
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -2px;
  line-height: 1;
  text-shadow: 0 0 20px rgba(0, 243, 255, 0.3);
  font-variant-numeric: tabular-nums;
  display: block;
}

.hero-label {
  display: block;
  font-size: 1.25rem;
  color: var(--accent-primary);
  margin-top: var(--spacing-md);
  opacity: 0.8;
}

/* Grid Layout */
.clock-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

/* Card Component */
.clock-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(var(--glass-blur));
  padding: var(--spacing-lg);
  border-radius: 12px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.clock-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.card-label {
  display: block;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.card-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--text-primary);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.card-subtext {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
}

/* Module Hub & Homepage Curriculum */
.module-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  cursor: pointer;
  backdrop-filter: blur(var(--glass-blur));
}

.module-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.module-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.module-title {
  color: var(--accent-primary);
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
}

.module-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.module-meta {
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.7;
}

/* Animations */
@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

.blinking {
  animation: pulse 1s infinite;
}

/* Ad Styles */
.ad-container {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  margin: var(--spacing-lg) 0;
  min-height: 90px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed var(--card-border);
  border-radius: 8px;
}

.top-ad {
  margin-bottom: var(--spacing-xl);
}

.bottom-ad {
  margin-top: var(--spacing-xl);
}

/* Footer & Buttons */
.controls {
  text-align: center;
  margin-top: var(--spacing-xl);
}

button.btn-reset {
  background: transparent;
  border: 1px solid var(--accent-secondary);
  color: var(--accent-secondary);
  padding: 12px 24px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}

button.btn-reset:hover {
  background: var(--accent-secondary);
  color: #fff;
  box-shadow: 0 0 15px rgba(255, 0, 85, 0.4);
}

/* --- New AdSense Compliance Styles --- */

/* Navigation */
.site-nav {
  width: 100%;
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 1px;
}

.nav-brand strong {
  font-weight: 700;
  color: var(--accent-primary);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent-primary);
}

/* Typography for generic pages & info section */
.info-section, .page-content {
  max-width: 800px;
  margin: var(--spacing-xl) auto;
  padding: 0 var(--spacing-lg);
  line-height: 1.6;
}

.info-section h2, .page-content h2 {
  font-size: 1.5rem;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.info-section h3, .page-content h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.info-section p, .page-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
}

.page-content ul {
  color: var(--text-secondary);
  margin-left: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.page-content li {
  margin-bottom: var(--spacing-sm);
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.02);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.footer-container p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

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

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(5, 5, 5, 0.95);
  backdrop-filter: blur(15px);
  border-top: 1px solid var(--accent-primary);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  box-shadow: 0 -5px 20px rgba(0, 243, 255, 0.1);
}

.cookie-banner p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0;
  flex: 1;
  padding-right: var(--spacing-lg);
}

.btn-accept {
  background: var(--accent-primary);
  color: var(--bg-color);
  border: none;
  padding: 10px 24px;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-accept:hover {
  background: #fff;
  box-shadow: 0 0 15px rgba(0, 243, 255, 0.6);
}

@media (max-width: 600px) {
  .cookie-banner {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }
  .cookie-banner p {
    padding-right: 0;
  }
}