:root {
  --primary-color: #0072CE;
  --primary-hover: #005bb5;
  --text-main: #202124;
  --text-secondary: #5f6368;
  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --border-color: #dadce0;
  --shadow-sm: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --shadow-cmd: 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);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-pill: 50px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Open Sans', sans-serif;
  color: var(--text-main);
  background-color: var(--bg-white);
  line-height: 1.6;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

h1 {
  font-size: 3.5rem;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.5rem;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  color: var(--text-secondary);
  font-size: 1.125rem;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-small {
  padding: 0.5rem 1.25rem;
  font-size: 0.9rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: var(--shadow-cmd);
  transform: translateY(-2px);
  color: white;
}

.btn-secondary {
  background-color: white;
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-light);
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-2px);
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

header.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo img {
  height: 48px;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a:not(.btn) {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:not(.btn):hover {
  color: var(--primary-color);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
}

/* Sections General */
section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-header p {
  margin-top: 1rem;
}

/* Hero Section */
.hero {
  padding: 10rem 0 6rem;
  background-color: var(--bg-white);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  color: var(--text-main);
}

.hero-text p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
}

.hero-visual {
  position: relative;
  width: 100%;
  height: 600px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual iframe {
  width: 100%;
  height: 100%;
  border: none;
}

@media (max-width: 768px) {
  .hero-visual {
    height: 300px;
    /* Mobile height */
  }
}

/* Services Section */
.services {
  background-color: var(--bg-light);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--bg-white);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 114, 206, 0.1);
}

.service-icon {
  width: 56px;
  height: 56px;
  background-color: rgba(0, 114, 206, 0.1);
  color: var(--primary-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.service-icon svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
}

/* How We Work Section */
.how-we-work {
  background-color: var(--bg-white);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  position: relative;
}

.step-card {
  text-align: center;
  position: relative;
}

.step-number {
  width: 64px;
  height: 64px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 1.5rem;
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-sm);
}

.step-card:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 32px;
  left: 50%;
  width: 100%;
  height: 2px;
  background-color: var(--border-color);
  z-index: 1;
}

/* Impact Section */
.impact {
  background-color: var(--primary-color);
  color: white;
  text-align: center;
  padding: 8rem 0;
  position: relative;
  overflow: hidden;
}

.impact::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
  z-index: 1;
}

.impact .container {
  position: relative;
  z-index: 2;
}

.impact h2 {
  color: white;
}

.impact p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 800px;
  margin: 1.5rem auto 0;
  font-size: 1.25rem;
}

/* About Section */
.about {
  background-color: var(--bg-white);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text p {
  margin-bottom: 1.5rem;
}

.about-mission {
  background-color: var(--bg-light);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.about-mission h4 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.about-mission p {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 0;
}

/* Contact Section */
.contact {
  background-color: var(--bg-light);
  text-align: center;
}

.contact-card {
  background-color: var(--bg-white);
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: var(--primary-color);
}

.contact-info {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.contact-info a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.contact-info a:hover {
  color: var(--primary-color);
}

/* Footer */
footer {
  background-color: var(--bg-white);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .logo {
  margin-bottom: 1rem;
  display: block;
}

.footer-brand img {
  height: 32px;
}

.footer-links h4 {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.1s;
}

.delay-2 {
  transition-delay: 0.2s;
}

.delay-3 {
  transition-delay: 0.3s;
}

/* Responsive */
@media (max-width: 992px) {
  h1 {
    font-size: 3rem;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem 2rem;
  }

  .step-card:nth-child(2)::after {
    display: none;
  }

  .step-card:not(:last-child)::after {
    width: calc(100% + 2rem);
  }

  .hero-visual {
    height: 400px;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hero {
    padding-top: 8rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-cmd);
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

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

  .step-card::after {
    display: none !important;
  }

  .contact-card {
    padding: 2.5rem 1.5rem;
  }
}