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

body {
  font-family: "Arial", sans-serif;
  line-height: 1.6;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Visually Hidden for Screen Readers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
header {
  background: #ff6b35;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo img {
  border-radius: 8px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  transition: all 0.3s ease;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.3s;
  padding: 0.5rem 1rem;
  border-radius: 4px;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.2);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: white;
  margin: 3px 0;
  transition: 0.3s;
  border-radius: 2px;
}

/* Mobile menu animation */
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

/* Hero Section */
.hero {
  background: #ff6b35;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 0;
  color: white;
  text-align: center;
}

.hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.hero-logo img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  margin-bottom: 2rem;
}

.mission-quote {
  font-style: italic;
  color: white;
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3rem);
  text-align: center;
}

/* Mission Section */
.mission {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 0;
  background: #f8f9fa;
}

.mission-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.mission-content img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.mission-text h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: 1.5rem;
  color: #333;
  line-height: 1.2;
}

.mission-text p {
  color: #666;
  line-height: 1.6;
  margin-bottom: 1rem;
  font-size: clamp(1rem, 1.5vw, 1.3rem);
}

/* Featured Project Section */
.featured-project {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 0;
  background: white;
}

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

.phone-mockup {
  text-align: center;
}

.phone {
  width: 250px;
  height: 500px;
  border: 16px solid #000;
  border-radius: 40px;
  position: relative;
  overflow: hidden;
  background: #000;
  margin: 0 auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 24px;
  overflow: hidden;
}

.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.project-details h1 {
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1.1;
  margin-bottom: 1rem;
  color: #333;
}

.project-status {
  display: inline-block;
  background: #ff6b35;
  color: white;
  padding: 0.3rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.project-status.featured {
  background: #28a745;
}

.project-details h2 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  color: #333;
  margin-bottom: 1rem;
}

.project-tagline {
  font-size: 1.2rem;
  color: #ff6b35;
  font-weight: 600;
  margin-bottom: 1rem;
}

.project-description {
  color: #666;
  line-height: 1.6;
  margin-bottom: 2rem;
  font-size: clamp(1rem, 1.5vw, 1.3rem);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tech-tag {
  background: #e9ecef;
  color: #495057;
  padding: 0.25rem 0.8rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Footer */
footer {
  background: #333;
  color: white;
  padding: 2rem 0;
  text-align: center;
}

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

.footer-logo img {
  border-radius: 8px;
}

/* Typography scaling */
h1 {
  font-size: clamp(3rem, 6vw, 5rem);
  line-height: 1.1;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.2;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

p {
  font-size: clamp(1rem, 1.5vw, 1.3rem);
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
  .container {
    padding: 0 15px;
  }

  /* Mobile Navigation */
  .nav-links {
    position: fixed;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100vh;
    background: #ff6b35;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    font-size: 1.2rem;
    transition: left 0.3s ease;
  }

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

  .mobile-menu-toggle {
    display: flex;
    z-index: 101;
    position: relative;
  }

  /* Layout adjustments */
  .mission-content,
  .project-showcase {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }

  .phone {
    width: 200px;
    height: 400px;
  }

  /* Reduce section heights on mobile */
  .hero,
  .mission,
  .featured-project {
    min-height: auto;
    padding: 2rem 0;
  }
}

@media (max-width: 480px) {
  .hero-logo img {
    max-width: 90%;
  }

  .mission-quote {
    font-size: 1.5rem;
  }

  .project-tech {
    justify-content: center;
  }
}