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

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  color: var(--color-black);
  background-color: var(--color-bg-primary);
  background-image:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 119, 190, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 100% 100%, rgba(255, 107, 53, 0.025) 0%, transparent 60%),
    linear-gradient(180deg, #FAFCFE 0%, #F4F7FA 100%);
  background-attachment: fixed;
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern", "liga", "calt";
  text-rendering: optimizeLegibility;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-black);
  margin-bottom: var(--spacing-sm);
  text-wrap: balance;
}

h1 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  letter-spacing: -0.025em;
}

h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.018em;
}

h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  letter-spacing: -0.012em;
}

h4 {
  font-size: var(--font-size-md);
  font-weight: 600;
  letter-spacing: -0.008em;
}

p {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-relaxed);
  text-wrap: pretty;
}

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

a:hover {
  color: var(--color-primary-dark);
}

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

/* Lists */
ul, ol {
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

/* Navigation */
.navbar {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  padding: var(--spacing-xs) 0;
  transition: box-shadow 350ms cubic-bezier(0.16, 1, 0.3, 1), padding 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

body.scrolled .navbar {
  box-shadow: var(--shadow-md);
  padding: 2px 0;
}

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

.logo {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 64px;
  width: auto;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  padding: 0;
  margin: 0;
}

.nav-link {
  font-weight: var(--font-weight-medium);
  color: var(--color-black);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-tint);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-black);
  transition: all var(--transition-fast);
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
}

/* Mobile Navigation Overlay */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
}

.mobile-nav-overlay.active {
  display: block;
}

.mobile-nav-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  transition: opacity 200ms ease-out;
}

.mobile-nav-overlay.active .mobile-nav-backdrop {
  opacity: 1;
}

.mobile-nav-menu {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--color-white);
  padding-top: 80px;
  transform: translateY(-100%);
  transition: transform 300ms var(--ease-smooth);
  box-shadow: var(--shadow-xl);
}

.mobile-nav-overlay.active .mobile-nav-menu {
  transform: translateY(0);
}

.mobile-nav-list {
  list-style: none;
  padding: var(--spacing-lg);
  margin: 0;
}

.mobile-nav-list li {
  margin-bottom: 0;
}

.mobile-nav-list a {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-black);
  border-radius: var(--radius-sm);
  transition: all 150ms ease-out;
  min-height: 44px;
  text-decoration: none;
}

.mobile-nav-list a:hover,
.mobile-nav-list a.active {
  background: var(--color-gray-light);
  color: var(--color-primary);
}

/* Hamburger to X animation */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Body scroll lock when menu open */
body.mobile-menu-open {
  overflow: hidden;
}

/* Hero Section */
.hero {
  position: relative;
  color: var(--color-white);
  padding: var(--spacing-3xl) 0;
  text-align: center;
  overflow: hidden;
  min-height: 70vh;
  display: flex;
  align-items: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo {
  max-width: 500px;
  width: 100%;
  height: auto;
  margin: 0 auto var(--spacing-2xl);
  display: block;
  opacity: 0;
  transform: scale(0.85) translateY(12px);
  animation: logoAppear 1200ms cubic-bezier(0.16, 1, 0.3, 1) 100ms forwards;
  filter: drop-shadow(0 8px 30px rgba(0, 0, 0, 0.2));
}

@keyframes logoAppear {
  0% {
    opacity: 0;
    transform: scale(0.85) translateY(12px);
  }
  60% {
    opacity: 1;
    transform: scale(1.02) translateY(-2px);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@media (max-width: 768px) {
  .hero-logo {
    max-width: 340px;
  }
}

@media (max-width: 480px) {
  .hero-logo {
    max-width: 280px;
  }
}

/* Hero video background styling */
.hero .video-background video {
  opacity: 0.4;
}

.hero .video-background::after {
  background: linear-gradient(135deg, rgba(0, 90, 141, 0.6) 0%, rgba(0, 119, 190, 0.6) 100%);
}

.hero-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

.hero-subtitle {
  color: var(--color-white);
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  font-weight: var(--font-weight-medium);
  text-align: center;
  max-width: 640px;
  margin: calc(-1 * var(--spacing-xl)) auto var(--spacing-2xl);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  letter-spacing: 0.01em;
  line-height: 1.55;
  text-wrap: balance;
}

@media (max-width: 768px) {
  .hero-subtitle {
    font-size: 1rem;
    margin: calc(-1 * var(--spacing-lg)) auto var(--spacing-xl);
    padding: 0 var(--spacing-md);
  }
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Sections */
section {
  padding: calc(var(--spacing-3xl) * 1.25) 0;
}

@media (max-width: 768px) {
  section {
    padding: var(--spacing-3xl) 0;
  }
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-header {
  background: transparent;
  padding: var(--spacing-2xl) 0;
  text-align: center;
  position: relative;
}

.page-header .container {
  background-color: var(--color-glass-strong);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  padding: var(--spacing-xl) var(--spacing-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  border: 1px solid var(--color-glass-border);
  max-width: 800px;
  position: relative;
}

@supports not (backdrop-filter: blur(20px)) {
  .page-header .container {
    background-color: var(--color-white);
  }
}

@media (max-width: 768px) {
  .page-header .container {
    padding: var(--spacing-lg) var(--spacing-md);
  }
}

.page-header h1 {
  margin-bottom: var(--spacing-sm);
  font-weight: 800;
  font-size: calc(var(--font-size-2xl) * 0.9);
}

.page-header p {
  font-size: var(--font-size-md);
  color: var(--color-gray-dark);
  font-weight: 500;
}

/* Footer */
.footer {
  background-color: #1a1a1e;
  background-image: linear-gradient(180deg, #2a2a2e 0%, #1a1a1e 100%);
  color: var(--color-white);
  padding: var(--spacing-2xl) 0 var(--spacing-md);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(0, 119, 190, 0.4) 50%, transparent 100%);
}

.footer a {
  color: var(--color-white);
  opacity: 0.8;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

.footer a:hover {
  opacity: 1;
}

.footer-section li a:hover {
  transform: translateX(3px);
  color: var(--color-primary-light);
}

.footer-experience {
  font-size: 11px;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-primary-light);
  opacity: 0.95;
  margin-top: 8px;
  margin-bottom: 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.9;
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-relaxed);
}

.footer-logo-wrapper {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
  max-width: 280px;
  height: auto;
  margin: 0 auto;
  opacity: 0.95;
  transition: opacity 250ms ease, transform 350ms cubic-bezier(0.16, 1, 0.3, 1), filter 350ms ease;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.2));
}

.footer-logo-wrapper:hover .footer-logo {
  opacity: 1;
  transform: scale(1.02);
  filter: drop-shadow(0 6px 18px rgba(51, 153, 204, 0.3));
}

@media (max-width: 768px) {
  .footer-logo {
    max-width: 220px;
  }
  
  .footer-logo-wrapper {
    margin-bottom: var(--spacing-xl);
  }
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0.7;
}

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

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

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

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}