/* ARQXX Technologies - Unified Theme */
/* Inspired by Vova Creative with tech-focused branding */

:root {
  /* Brand Colors - Based on ARQXX Logo */
  --primary-dark: #1e3a3a;
  --primary-light: #4a6b6b;
  --accent-blue: #00d4ff;
  --background-dark: #0f1419;
  --background-secondary: #1a2332;
  --text-white: #ffffff;
  --text-light: #e2e8f0;
  --text-muted: #94a3b8;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent-blue) 0%, #0ea5e9 100%);
  --gradient-background: linear-gradient(135deg, var(--background-dark) 0%, var(--background-secondary) 100%);
  
  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-code: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* 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, 212, 255, 0.3);
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--gradient-background);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-white);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-4);
  color: var(--text-light);
}

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

a:hover {
  color: var(--text-white);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-base);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--accent-blue);
  border: 2px solid var(--accent-blue);
}

.btn-secondary:hover {
  background: var(--accent-blue);
  color: var(--text-white);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* Cards */
.card {
  background: rgba(26, 35, 50, 0.8);
  border: 1px solid rgba(74, 107, 107, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-blue);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.space-x-4 > * + * { margin-left: var(--space-4); }
.space-y-4 > * + * { margin-top: var(--space-4); }

/* Text Utilities */
.text-center { text-align: center; }
.text-white { color: var(--text-white); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-blue); }

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --text-5xl: 2.5rem;
    --text-4xl: 2rem;
    --text-3xl: 1.5rem;
  }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-3);
  }
}

.text-center { text-align: center; }
.text-white { color: var(--text-white); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-blue); }

/* ===== HEADER STYLES ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  transition: all var(--transition-normal);
}

.navbar {
  background: rgba(15, 20, 25, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(74, 107, 107, 0.1);
  padding: var(--space-4) 0;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(15, 20, 25, 0.98);
  padding: var(--space-3) 0;
  box-shadow: var(--shadow-lg);
}

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

/* Brand */
.navbar-brand {
  display: flex;
  align-items: center;
}

.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-white);
}

.brand-logo {
  height: 40px;
  width: auto;
}

.brand-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--text-white);
}

/* Navigation */
.navbar-menu {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-8);
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-blue);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-blue);
  transition: width var(--transition-normal);
}

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

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: rgba(26, 35, 50, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(74, 107, 107, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-xl);
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  color: var(--text-light);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent-blue);
}

/* CTA Button */
.navbar-cta {
  display: flex;
  align-items: center;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  gap: 4px;
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background: var(--text-white);
  transition: all var(--transition-normal);
}

.mobile-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Menu */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(15, 20, 25, 0.98);
  backdrop-filter: blur(10px);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
}

.mobile-logo {
  height: 44px;
}

.mobile-close {
  background: none;
  border: none;
  color: var(--text-white);
  font-size: var(--text-3xl);
  cursor: pointer;
}

.mobile-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-nav-link {
  color: var(--text-light);
  text-decoration: none;
  font-size: var(--text-lg);
  padding: var(--space-3) 0;
  border-bottom: 1px solid rgba(74, 107, 107, 0.2);
  transition: color var(--transition-fast);
}

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

.mobile-dropdown-toggle {
  background: none;
  border: none;
  color: var(--text-light);
  font-size: var(--text-lg);
  padding: var(--space-3) 0;
  width: 100%;
  text-align: left;
  cursor: pointer;
  border-bottom: 1px solid rgba(74, 107, 107, 0.2);
}

.mobile-dropdown {
  position: relative;
}

.mobile-dropdown-toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
}

.mobile-dropdown-toggle::after {
  content: '▼';
  font-size: 0.8rem;
  transition: transform var(--transition-fast);
}

.mobile-dropdown-toggle.active::after {
  transform: rotate(180deg);
}

.mobile-dropdown-content {
  display: none;
  flex-direction: column;
  padding-left: var(--space-4);
  margin-top: var(--space-2);
  background: rgba(30, 58, 58, 0.3);
  border-radius: 8px;
  padding: var(--space-2) var(--space-4);
  margin-bottom: var(--space-2);
}

.mobile-dropdown-content.active {
  display: flex;
}

.mobile-dropdown-content .mobile-nav-link {
  padding: var(--space-2) 0;
  font-size: var(--text-base);
  border-bottom: 1px solid rgba(74, 107, 107, 0.1);
}

.mobile-dropdown-content .mobile-nav-link:last-child {
  border-bottom: none;
}

.mobile-menu-footer {
  margin-top: var(--space-8);
}

/* ===== FOOTER STYLES ===== */
.footer {
  background: var(--gradient-background);
  position: relative;
  overflow: hidden;
}

.footer-main {
  padding: var(--space-20) 0 var(--space-16);
  position: relative;
  z-index: 2;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-12);
}

.footer-section {
  display: flex;
  flex-direction: column;
}

/* Brand Section */
.footer-brand {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-4);
}

.footer-logo {
  height: 48px;
  width: auto;
}

.footer-brand-text {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-white);
  margin: 0;
}

.footer-description {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

/* Social Links */
.social-links {
  display: flex;
  gap: var(--space-4);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(74, 107, 107, 0.2);
  border-radius: var(--radius-lg);
  color: var(--text-light);
  transition: all var(--transition-normal);
}

.social-link:hover {
  background: var(--accent-blue);
  color: var(--text-white);
  transform: translateY(-2px);
}

/* Footer Titles */
.footer-title {
  color: var(--text-white);
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: var(--space-4);
  font-size: var(--text-lg);
}

/* Footer Links */
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: block;
  padding: var(--space-1) 0;
}

.footer-link:hover {
  color: var(--accent-blue);
}

/* Contact Info */
.contact-info {
  margin-bottom: var(--space-6);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  color: var(--text-muted);
}

.contact-item svg {
  color: var(--accent-blue);
  flex-shrink: 0;
}

/* Newsletter */
.newsletter-title {
  color: var(--text-white);
  font-weight: 600;
  margin-bottom: var(--space-3);
  font-size: var(--text-base);
}

.newsletter-form {
  display: flex;
  gap: var(--space-2);
}

.newsletter-input {
  flex: 1;
  padding: var(--space-3);
  background: rgba(74, 107, 107, 0.2);
  border: 1px solid rgba(74, 107, 107, 0.3);
  border-radius: var(--radius-lg);
  color: var(--text-white);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  background: rgba(74, 107, 107, 0.3);
}

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

.newsletter-btn {
  padding: var(--space-3);
  background: var(--accent-blue);
  border: none;
  border-radius: var(--radius-lg);
  color: var(--text-white);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.newsletter-btn:hover {
  background: #0ea5e9;
  transform: translateY(-1px);
}

/* Footer Bottom */
.footer-bottom {
  background: rgba(15, 20, 25, 0.8);
  border-top: 1px solid rgba(74, 107, 107, 0.2);
  padding: var(--space-6) 0;
  position: relative;
  z-index: 2;
}

.footer-bottom-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.copyright {
  color: var(--text-muted);
  margin: 0;
  font-size: var(--text-sm);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer-bottom-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer-bottom-link:hover {
  color: var(--accent-blue);
}

/* Tech Grid Background */
.footer .tech-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.05;
  z-index: 1;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-6);
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-4);
  }
  
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .text-center-mobile {
    text-align: center;
  }
  
  /* Header Mobile */
  .navbar-menu,
  .navbar-cta {
    display: none;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .brand-text {
    display: none;
  }
  
  /* Footer Mobile */
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .footer-main {
    padding: var(--space-16) 0 var(--space-12);
  }
  
  .footer-bottom-content {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
  
  .footer-bottom-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-3);
  }
  
  /* Header Mobile */
  .navbar {
    padding: var(--space-3) 0;
  }
  
  .brand-logo {
    height: 36px;
  }
  
  /* Footer Mobile */
  .footer-main {
    padding: var(--space-12) 0 var(--space-8);
  }
  
  .social-links {
    justify-content: center;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .newsletter-btn {
    align-self: stretch;
  }
}