@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  /* Premium Light Theme Core Colors */
  --bg-dark: #f8fafc; /* Soft off-white background */
  --bg-darker: #f1f5f9; /* Slightly darker for footers/sections */
  --bg-card: #ffffff; /* Pure white cards */
  --bg-card-hover: rgba(255, 255, 255, 0.9);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(0, 0, 0, 0.08); /* Subtle border for glass effect */
  
  /* Accents - Trust & Energy gradients */
  --accent-primary: #2563eb; /* Cobalt Blue */
  --accent-secondary: #7c3aed; /* Deep Violet */
  --accent-tertiary: #0891b2; /* Cyan */
  --gradient-glow: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  --gradient-text: linear-gradient(to right, #0f172a, #475569);
  --gradient-highlight: linear-gradient(to right, #2563eb, #9333ea);
  
  /* Text */
  --text-main: #0f172a; /* Deep Slate/Charcoal for main text */
  --text-muted: #64748b; /* Medium Grey for muted text */
  --text-dark: #334155; /* Slightly lighter than main for some headings/links */

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Layout */
  --max-width: 1200px;
  --nav-height: 80px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

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

ul {
  list-style: none;
}

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

/* Base Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 8rem 0;
  position: relative;
}

/* Typography Utilities */
.text-gradient {
  background: var(--gradient-highlight);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

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

.text-center {
  text-align: center;
}

.section-title {
  font-size: 3rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 4rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 9999px;
  cursor: pointer;
  transition: all var(--transition-smooth);
  border: none;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-primary {
  background: var(--gradient-glow);
  color: white;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition-smooth);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-fast);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 24px;
  height: 24px;
  background: var(--gradient-glow);
  border-radius: 6px;
  display: inline-block;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dark);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-glow);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after {
  width: 100%;
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Card Components */
.card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2.5rem;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03); /* Soft shadow for light theme */
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(circle at top right, rgba(37, 99, 235, 0.05), transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: rgba(0, 0, 0, 0.1);
  box-shadow: 0 15px 35px rgba(0,0,0,0.08); /* Enhance shadow on hover */
}

.card:hover::before {
  opacity: 1;
}

/* Footer Section */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--glass-border);
  padding: 5rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  color: var(--text-muted);
  margin-top: 1.5rem;
  max-width: 300px;
}

.footer-title {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-link {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-link:hover {
  color: var(--accent-primary);
  transform: translateX(3px);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 992px) {
  .nav-links {
    display: none; /* simple hidden for now, will implement mobile menu via JS */
  }
  .mobile-toggle {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 5rem 0;
  }
  .section-title {
    font-size: 2.25rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* Background Effects */
.bg-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(0,0,0,0) 70%);
  border-radius: 50%;
  filter: blur(60px);
  z-index: -1;
  pointer-events: none;
}

/* Form Styles */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-dark);
}

.form-control {
  width: 100%;
  padding: 1rem;
  background: #ffffff; /* White background for inputs */
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-main);
  font-family: var(--font-body);
  transition: all var(--transition-fast);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

/* Utility Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in-up {
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  opacity: 0;
}

.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }