/* Global Variables */
:root {
  --color-bg: #0a0e17; /* Deep navy / charcoal */
  --color-bg-light: #151b2b;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-accent-emerald: #10b981;
  --color-accent-gold: #fbbf24;
  --color-accent-blue: #3b82f6;
  
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;

  --border-radius: 20px;
  --border-radius-sm: 10px;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.2;
}

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

img {
  max-width: 100%;
  border-radius: var(--border-radius);
  object-fit: cover;
}

/* Auth Overlay */
#auth-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--color-bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease;
}

#auth-overlay::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(16, 185, 129, 0.1) 0%, transparent 60%);
  animation: pulse 8s infinite alternate ease-in-out;
}

.auth-card {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 4rem 3rem;
  border-radius: 30px;
  text-align: center;
  backdrop-filter: blur(20px);
  max-width: 400px;
  width: 90%;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  transform: translateY(0);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.auth-card.shake {
  animation: shake 0.5s;
  border-color: rgba(239, 68, 68, 0.5);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.2);
}

.auth-card h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.auth-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.auth-input-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.auth-input {
  width: 100%;
  padding: 1rem;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  color: white;
  font-family: monospace;
  font-size: 1.1rem;
  text-align: center;
  outline: none;
  transition: var(--transition);
}

.auth-input:focus {
  border-color: var(--color-accent-emerald);
}

.auth-btn {
  background: var(--color-accent-emerald);
  color: var(--color-bg);
  border: none;
  padding: 1rem 2rem;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.auth-btn:hover {
  background: #059669;
  transform: translateY(-2px);
}

/* Animations */
@keyframes shake {
  0% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  50% { transform: translateX(10px); }
  75% { transform: translateX(-10px); }
  100% { transform: translateX(0); }
}

@keyframes pulse {
  0% { opacity: 0.5; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.1); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s ease, transform 1s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Layout Utilities */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

section {
  padding: var(--spacing-xl) 0;
  position: relative;
}

.glass-panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  backdrop-filter: blur(10px);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

/* Header */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  padding: 1.5rem 0;
  transition: var(--transition);
}

header.scrolled {
  background: rgba(10, 14, 23, 0.9);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 1px;
}

.logo span {
  color: var(--color-accent-emerald);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  opacity: 0.8;
}

.nav-links a:hover,
.nav-links a.active {
  opacity: 1;
  color: var(--color-accent-emerald);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
}

.hero h1 {
  font-size: clamp(3rem, 5vw, 6rem);
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, #fff, var(--color-text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 2rem;
}

/* Footer elements */
.footer {
  background: linear-gradient(to top, #000, var(--color-bg));
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-col h4 {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: white;
}

.footer-col p, .footer-col a {
  color: var(--color-text-muted);
  margin-bottom: 0.8rem;
  display: block;
}

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

.newsletter-form {
  display: flex;
  margin-top: 1rem;
}

.newsletter-form input {
  padding: 0.8rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
  color: white;
  outline: none;
  flex: 1;
}

.newsletter-form button {
  padding: 0.8rem 1.2rem;
  background: var(--color-accent-emerald);
  border: none;
  color: var(--color-bg);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  font-weight: bold;
  cursor: pointer;
}

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Specific UI blocks */
.metric-card {
  background: linear-gradient(145deg, rgba(255,255,255,0.05) 0%, rgba(0,0,0,0.2) 100%);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  transition: transform 0.3s ease;
}

.metric-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent-emerald);
}

.metric-value {
  font-size: 3.5rem;
  font-family: var(--font-heading);
  color: var(--color-accent-emerald);
  margin-bottom: 0.5rem;
  font-weight: 300;
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; /* simple mobile nav override needed later if req'd */ }
}