/* ===================================
   NEFEX Website - Design System
   Intelligence Engineered
   =================================== */

/* ===== CSS Variables ===== */
:root {
  /* Colors - Professional Tech Palette */
  --primary-navy: #1d1d1f;
  /* Apple dark gray */
  --primary-blue: #0071e3;
  /* Apple blue */
  --accent-cyan: #2997ff;
  /* Apple bright blue */
  --accent-purple: #8668ff;
  /* Apple purple */
  --text-white: #ffffff;
  --text-light: rgba(255, 255, 255, 0.8);
  /* Apple text-white-80 */
  --text-gray: #86868b;
  /* Apple gray */
  --bg-dark: #1d1d1f;
  /* Apple dark gray */
  --bg-darker: #000000;
  /* Pure black */
  --gradient-primary: linear-gradient(135deg, #0071e3 0%, #2997ff 100%);
  --gradient-dark: linear-gradient(180deg, #000000 0%, #1d1d1f 100%);
  --gradient-glow: radial-gradient(circle at center, rgba(41, 151, 255, 0.15) 0%, transparent 70%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Space Grotesk', 'Inter', sans-serif;

  /* Spacing */
  --section-padding: 120px 0;
  --container-max: 1200px;
  --container-padding: 0 24px;

  /* Effects */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --shadow-glow: 0 0 40px rgba(41, 151, 255, 0.3);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-darker);
  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);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}

p {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--text-gray);
}

/* ===== Container ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--container-padding);
}

/* ===== Header & Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  background: rgba(10, 22, 40, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-smooth);
}

.header.scrolled {
  padding: 12px 0;
  background: rgba(10, 22, 40, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-white);
  text-decoration: none;
  letter-spacing: 0.05em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
  position: relative;
  padding: 8px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 8px;
}

.menu-toggle span {
  width: 28px;
  height: 3px;
  background: var(--text-white);
  transition: var(--transition-smooth);
  border-radius: 3px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 50px;
  transition: var(--transition-smooth);
  cursor: pointer;
  border: none;
  font-family: var(--font-primary);
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-white);
  box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 102, 255, 0.6);
}

.btn-outline {
  background: transparent;
  color: var(--text-white);
  border: 2px solid var(--primary-blue);
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg-darker);
  padding-top: 80px;
  /* Account for fixed header */
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0, 102, 255, 0.1) 0%, transparent 50%, var(--bg-darker) 100%);
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 100px 20px 60px;
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-size: clamp(4rem, 12vw, 8rem);
  line-height: 0.95;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 32px;
  background: linear-gradient(135deg, #ffffff 0%, #00d4ff 70%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  color: var(--text-gray);
  font-weight: 400;
  margin: 0 auto 48px;
  max-width: 800px;
  line-height: 1.5;
}

.hero-cta {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Sections & Headers ===== */
.section {
  padding: var(--section-padding);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-gray);
  max-width: 700px;
  margin: 24px auto 0;
}

/* ===== Split Layout ===== */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

@media (max-width: 968px) {
  .split-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ===== Contact Form ===== */
.contact-form-container {
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Blog Filters ===== */
.blog-filters {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 24px;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-gray);
  cursor: pointer;
  transition: var(--transition-smooth);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 500;
}

.filter-btn.active,
.filter-btn:hover {
  background: var(--primary-blue);
  color: var(--text-white);
  border-color: var(--primary-blue);
}

/* ===== Grid Layouts ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

/* ===== Cards ===== */
.card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 32px;
  transition: var(--transition-smooth);
  backdrop-filter: blur(10px);
}

.card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-card);
  background: rgba(255, 255, 255, 0.05);
}

.card-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 12px;
  color: var(--text-white);
}

.card-description {
  color: var(--text-gray);
  line-height: 1.7;
}

/* ===== Footer ===== */
.footer {
  background: var(--primary-navy);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 60px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-gray);
  text-decoration: none;
  transition: var(--transition-smooth);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-gray);
  font-size: 0.9rem;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-20px);
  }
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  :root {
    --section-padding: 80px 0;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(10, 22, 40, 0.98);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 40px 0;
    gap: 24px;
    transition: left 0.3s ease;
  }

  .nav-links.active {
    left: 0;
  }

  .menu-toggle {
    display: flex;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ===== Utility Classes ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glow {
  box-shadow: var(--shadow-glow);
}
/* ===================================
   RESPONSIVE DESIGN - MOBILE & TABLET
   =================================== */

/* ===== Tablet (≤768px) ===== */
@media (max-width: 768px) {
  /* Typography */
  .hero-title {
    font-size: 3rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  /* Layout Spacing */
  :root {
    --section-padding: 80px 0;
    --container-padding: 0 20px;
  }
  
  /* Navigation */
  .nav-links {
    position: fixed;
    top: 70px;
    right: -100%;
    width: 280px;
    height: calc(100vh - 70px);
    background: var(--bg-dark);
    flex-direction: column;
    padding: 40px 0;
    transition: right 0.3s ease;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 999;
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-links li {
    margin: 0;
    padding: 0 30px;
    width: 100%;
  }
  
  .nav-links a {
    display: block;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  
  .menu-toggle {
    display: flex;
  }
  
  /* Hero Section */
  .hero {
    min-height: 70vh;
    padding-top: 100px;
  }
  
  /* Grids */
  .grid-2 {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  
  .split-layout {
    flex-direction: column;
    gap: 40px;
  }
  
  .split-content, .split-image {
    flex: 1;
  }
  
  /* Stats Grid */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
  
  /* Cards */
  .card {
    padding: 30px;
  }
  
  /* Footer */
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

/* ===== Mobile (≤480px) ===== */
@media (max-width: 480px) {
  /* Typography */
  .hero-title {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .hero-subtitle, .section-subtitle {
    font-size: 1rem;
  }
  
  .card-title {
    font-size: 1.3rem;
  }
  
  .card-description, p {
    font-size: 0.95rem;
  }
  
  /* Layout Spacing */
  :root {
    --section-padding: 60px 0;
    --container-padding: 0 16px;
  }
  
  /* Navigation */
  .nav-links {
    width: 100%;
    right: -100%;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  /* Hero Section */
  .hero {
    min-height: 60vh;
    padding-top: 80px;
  }
  
  /* All Grids to Single Column */
  .grid-2, .grid-3, .stats-grid {
    grid-template-columns: 1fr !important;
    gap: 20px;
  }
  
  /* Buttons */
  .btn {
    padding: 12px 24px;
    font-size: 0.95rem;
  }
  
  .btn-lg {
    padding: 14px 28px;
    width: 100%;
    text-align: center;
  }
  
  /* Forms */
  .contact-form-container {
    padding: 30px 20px !important;
  }
  
  .form-group input,
  .form-group textarea,
  .form-group select {
    font-size: 16px !important; /* Prevents zoom on iOS */
  }
  
  /* Cards */
  .card {
    padding: 24px;
  }
  
  .card-icon {
    font-size: 2.5rem;
  }
  
  /* Footer */
  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .footer-section {
    text-align: center;
  }
  
  .footer-section div {
    justify-content: center;
  }
  
  /* Podcast Player (Blog Pages) */
  .podcast-player {
    padding: 24px !important;
  }
  
  audio {
    width: 100%;
    height: 40px;
  }
  
  /* Blog Content */
  .blog-title {
    font-size: 1.8rem !important;
  }
  
  .blog-content h2 {
    font-size: 1.5rem !important;
  }
  
  .blog-content h3 {
    font-size: 1.2rem !important;
  }
  
  .blog-post-container {
    padding: 30px 16px !important;
  }
  
  /* Tables */
  .comparison-table {
    font-size: 0.85rem;
  }
  
  .comparison-table th,
  .comparison-table td {
    padding: 10px 8px;
  }
  
  /* Images */
  .split-image img {
    border-radius: 12px;
  }
  
  /* Modal Adjustments (Careers) */
  .modal-content {
    max-height: 90vh !important;
    margin: 5% auto !important;
    padding: 24px !important;
  }
  
  /* Job Cards (Careers) */
  .job-card {
    padding: 24px !important;
  }
  
  .job-actions {
    flex-direction: column;
    gap: 12px;
  }
  
  .job-actions .btn {
    width: 100%;
  }
}

/* ===== Small Mobile (≤375px) ===== */
@media (max-width: 375px) {
  .hero-title {
    font-size: 2.2rem;
  }
  
  .section-title {
    font-size: 1.6rem;
  }
  
  .card {
    padding: 20px;
  }
  
  .contact-form-container {
    padding: 24px 16px !important;
  }
}

/* Blog Page Featured Card */
@media (max-width: 768px) {
  /* Featured blog card should stack on mobile */
  .section [style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }
  
  /* Reduce padding on featured blog content */
  .section [style*="padding: 48px"] {
    padding: 32px !important;
  }
}

@media (max-width: 480px) {
  .section [style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
    max-height: none !important;
  }
  
  .section [style*="min-height: 400px"] {
    min-height: 250px !important;
  }
  
  .section [style*="padding: 48px"] {
    padding: 24px !important;
  }
}