/* ===================================
   NEXUS INTEGRATIONS - MODERN DESIGN
   =================================== */

/* === CSS Variables === */
:root {
  /* Primary Colors */
  --color-navy-dark: #0A2540;
  --color-navy-medium: #1A365D;
  --color-blue-primary: #1E88E5;
  --color-blue-light: #42A5F5;

  /* Accent Colors */
  --color-cyan: #00D9FF;
  --color-cyan-light: #4DE8FF;
  --color-purple: #7C3AED;
  --color-purple-light: #A78BFA;

  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-gray-50: #F8FAFC;
  --color-gray-100: #F1F5F9;
  --color-gray-200: #E2E8F0;
  --color-gray-300: #CBD5E1;
  --color-gray-700: #334155;
  --color-gray-800: #1E293B;
  --color-gray-900: #0F172A;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1E88E5 0%, #7C3AED 100%);
  --gradient-hero: linear-gradient(135deg, #0A2540 0%, #1A365D 50%, #1E88E5 100%);
  --gradient-accent: linear-gradient(135deg, #00D9FF 0%, #1E88E5 100%);

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(0, 217, 255, 0.3);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background-color: var(--color-gray-50);
  color: var(--color-gray-800);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', 'Segoe UI', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-navy-dark);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-700);
  font-size: 1.0625rem;
}

/* === Container === */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg) 0;
}

/* === Header === */
header {
  background: var(--color-navy-dark);
  color: var(--color-white);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--color-cyan);
}

header .header-content {
  text-align: center;
  padding: var(--spacing-sm) 0 var(--spacing-xs) 0;
}

header .logo {
  max-width: 50px;
  height: auto;
  margin-bottom: var(--spacing-xs);
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.3));
  transition: transform var(--transition-normal);
}

header .logo:hover {
  transform: scale(1.05);
}

header h1 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.25rem;
}

header .tagline {
  color: var(--color-cyan-light);
  font-size: clamp(0.75rem, 2vw, 0.9rem);
  font-weight: 300;
  margin-bottom: 0;
}

/* === Navigation === */
nav {
  background: rgba(26, 54, 93, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

nav ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  list-style: none;
  padding: 0.5rem 0;
  gap: 0.25rem;
}

nav ul li {
  margin: 0;
}

nav ul li a {
  color: rgba(255, 255, 255, 0.95);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  display: block;
  position: relative;
}

nav ul li a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition-normal);
}

nav ul li a:hover,
nav ul li a:focus {
  color: var(--color-cyan);
  background: rgba(255, 255, 255, 0.05);
}

nav ul li a:hover::before,
nav ul li a:focus::before {
  width: 80%;
}

nav ul li a[aria-current="page"] {
  background: rgba(0, 217, 255, 0.15);
  color: var(--color-cyan);
}

nav ul li a[aria-current="page"]::before {
  width: 80%;
}

/* === Hero Section === */
.hero {
  background: var(--gradient-hero);
  color: var(--color-white);
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-sm);
  margin: 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.5;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: var(--color-white);
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero p {
  font-size: clamp(1rem, 3vw, 1.25rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* === Main === */
main {
  min-height: 60vh;
}

main section {
  padding: var(--spacing-2xl) 0;
}

main section:not(.hero) {
  border-bottom: 1px solid var(--color-gray-200);
}

main section:last-child {
  border-bottom: none;
}

main h2 {
  color: var(--color-navy-dark);
  position: relative;
  display: inline-block;
}

main h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--gradient-accent);
  border-radius: var(--radius-sm);
}

/* === Cards === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid var(--color-gray-200);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-blue-primary);
}

.card h3 {
  color: var(--color-blue-primary);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.card p, .card li {
  color: var(--color-gray-700);
  font-size: 1rem;
}

.card ul {
  list-style: none;
  padding-left: 0;
}

.card ul li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-md);
  position: relative;
}

.card ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-cyan);
  font-weight: bold;
}

/* === Recovery Connect Special Styling === */
.recovery-highlight {
  background: linear-gradient(135deg, #7C3AED 0%, #A78BFA 100%);
  color: var(--color-white);
  border: none;
}

.recovery-highlight h3 {
  color: var(--color-white);
}

.recovery-highlight p,
.recovery-highlight li {
  color: rgba(255, 255, 255, 0.95);
}

.recovery-highlight ul li::before {
  color: var(--color-white);
}

.recovery-highlight:hover {
  border-color: var(--color-purple);
  box-shadow: 0 0 30px rgba(124, 58, 237, 0.4);
}

/* === Links === */
a {
  color: var(--color-blue-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--color-cyan);
  text-decoration: underline;
}

/* === CTA Buttons === */
.cta-button {
  display: inline-block;
  background: var(--gradient-accent);
  color: var(--color-navy-dark);
  font-weight: 700;
  text-decoration: none;
  padding: 1rem 2rem;
  border-radius: var(--radius-md);
  margin-top: var(--spacing-md);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  font-size: 1.0625rem;
  border: 2px solid transparent;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cta-button:hover,
.cta-button:focus {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: var(--color-navy-dark);
  text-decoration: none;
}

.cta-button-secondary {
  background: var(--color-white);
  color: var(--color-blue-primary);
  border: 2px solid var(--color-blue-primary);
}

.cta-button-secondary:hover,
.cta-button-secondary:focus {
  background: var(--color-blue-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-lg);
}

/* === Contact Grid === */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.contact-item {
  background: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-cyan);
  transition: all var(--transition-normal);
}

.contact-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(5px);
}

.contact-item strong {
  color: var(--color-navy-dark);
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 0.9375rem;
}

.contact-item a {
  font-size: 0.9375rem;
  word-break: break-all;
}

/* === Footer === */
footer {
  background: var(--color-navy-dark);
  color: var(--color-white);
  text-align: center;
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-2xl);
  border-top: 2px solid var(--color-cyan);
}

footer p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-xs);
  font-size: 0.9375rem;
}

footer a {
  color: var(--color-cyan-light);
  transition: color var(--transition-fast);
}

footer a:hover,
footer a:focus {
  color: var(--color-white);
  text-decoration: underline;
}

/* === Utility Classes === */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* === Dark Mode === */
@media (prefers-color-scheme: dark) {
  body {
    background-color: var(--color-gray-900);
    color: var(--color-gray-100);
  }

  h1, h2, h3, h4, h5, h6 {
    color: var(--color-white);
  }

  p, li {
    color: var(--color-gray-300);
  }

  .card {
    background: var(--color-gray-800);
    border-color: var(--color-gray-700);
  }

  .card:hover {
    border-color: var(--color-cyan);
  }

  .contact-item {
    background: var(--color-gray-800);
    border-left-color: var(--color-cyan);
  }

  main section:not(.hero) {
    border-bottom-color: var(--color-gray-700);
  }
}

/* === Responsive === */
@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    align-items: center;
  }

  nav ul li {
    margin: var(--spacing-xs) 0;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

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

.fade-in {
  animation: fadeIn 0.6s ease-out;
}