:root {
  --primary-color: #2A3F54;         /* Deep Navy */
  --text-primary: #333333;          /* Rich Black */
  --text-secondary: #4F4F4F;        /* Medium Gray Text */
  --text-muted: #828282;            /* Subtle Gray Text */
  --border-color: #BDBDBD;          /* Light Border / Divider */
  --accent-color: #0080bf;          /* Teal Accent */
  --background-soft: #F8F9FA;       /* Light Gray Background */
  --background-white: #FFFFFF;      /* White Background */
  --highlight-dark: #002b49;        /* Bold Accent */
}

/* Base Styles */
body {
  font-family: 'Inter', sans-serif;
  background-color: var(--background-soft);
  color: var(--text-primary);
  line-height: 1.6;
}

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

/* Header */
.page-header {
  background-color: var(--background-white);
  border-bottom: 1px solid var(--border-color);
  padding: 2rem 0;
  text-align: center;
  position: relative;
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.page-header .subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* Back and Nav Buttons */
.back-button {
  position: absolute;
  top: 20px;
  left: 20px;
  background-color: var(--primary-color);
  color: #fff;
  padding: 12px 18px;
  font-size: 0.95rem;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.back-button:hover {
  background-color: var(--highlight-dark);
}

.top-nav-group {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem auto;
  flex-wrap: wrap;
}

.nav-icon-button {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--primary-color);
  color: #fff;
  text-decoration: none;
  padding: 10px 16px;
  font-size: 0.95rem;
  border-radius: 8px;
  transition: background 0.3s ease, transform 0.2s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

.nav-icon-button:hover {
  background-color: var(--highlight-dark);
  transform: translateY(-2px);
}

.nav-icon-button .chevron {
  font-weight: bold;
  font-size: 1.1rem;
}

.nav-icon-button .label {
  font-weight: 500;
}

/* Mobile Adjustments */
@media (max-width: 480px) {
  .nav-icon-button {
    width: auto;
    font-size: 1rem;
    padding: 12px 20px;
  }

  .back-button {
    font-size: 0.95rem;
    padding: 12px 18px;
  }
}


.nav-buttons {
  position: absolute;
  top: 20px;
  right: 20px;
  display: flex;
  gap: 0.5rem;
}

.nav-button {
  background-color: var(--primary-color);
  color: #fff;
  padding: 10px 14px;
  font-size: 0.9rem;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.nav-button:hover {
  background-color: var(--highlight-dark);
}

/* Launch Button */
.launch-button {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: linear-gradient(135deg, var(--accent-color), #002b49);
  color: #fff;
  padding: 14px 22px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(0, 128, 191, 0.3);
  transition: all 0.3s ease;
  z-index: 1000;
  overflow: hidden;
  border: none;
}

.launch-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(255,255,255,0.2), transparent 70%);
  transform: translateX(0);
  animation: shine 2.5s linear infinite;
  pointer-events: none;
}

@keyframes shine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.launch-button:hover {
  background: linear-gradient(135deg, #002b49, var(--accent-color));
  transform: scale(1.05);
  box-shadow: 0 10px 30px rgba(0, 128, 191, 0.4);
}

.hero-row {
  display: flex;
  gap: 1rem;
  margin: 2rem 0;
}

.hero-tile {
  flex: 1;
  aspect-ratio: 16 / 9;
  background-size: cover;
  background-position: center;
  border-radius: 12px;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease;
}

.hero-tile:hover {
  transform: scale(1.02);
}

@media (max-width: 768px) {
  .hero-row {
    flex-direction: column;
  }
}

.video-showcase {
  margin-top: 4rem;
}

.video-grid {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.video-grid video {
  flex: 1;
  min-width: 300px;
  max-height: 400px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease;
}

.video-grid video:hover {
  transform: scale(1.02);
}

/* Responsive */
@media (max-width: 768px) {
  .video-grid {
    flex-direction: column;
  }
}

/* Info Section */
.info-section {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  flex: 1;
  min-width: 250px;
  background-color: var(--background-white);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 8px 16px rgba(0,0,0,0.05);
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
}

.card h2 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

/* About Section */
.about-section {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 4rem;
  align-items: center;
}

.about-text {
  flex: 1;
}

.about-text h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.about-img {
  flex: 1;
  min-width: 300px;
}

.about-img img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 6px 12px rgba(0,0,0,0.08);
  transition: transform 0.3s ease;
}

.about-img video {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 6px 12px rgba(0,0,0,0.08);
  transition: transform 0.3s ease;
}

.about-img img:hover {
  transform: scale(1.02);
}

/* Process Section */
.process-section {
  background-color: var(--background-soft);
  padding: 4rem 0;
  margin-top: 4rem;
}

.section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
}

.process-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}

.process-step {
  width: 200px;
  text-align: center;
}

.process-step img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.06);
  transition: transform 0.3s ease;
}

.process-step img:hover {
  transform: scale(1.03);
}

.process-step p {
  margin-top: 0.5rem;
  font-weight: 500;
}

/* Deliverables */
.deliverables-section {
  margin-top: 4rem;
}

.deliverables-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 2rem;
}

.deliverables-grid img {
  flex: 1;
  min-width: 300px;
  border-radius: 12px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.05);
  transition: transform 0.3s ease;
}

.deliverables-grid img:hover {
  transform: scale(1.02);
}

.description {
  margin-top: 1.5rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  text-align: center;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 4rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  background-color: #f1f1f1;
  border-top: 1px solid var(--border-color);
}

/* Responsive Enhancements */
@media (max-width: 1024px) {
  .container {
    padding: 1.5rem;
  }

  .about-section,
  .info-section {
    flex-direction: column;
  }

  .deliverables-grid {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .page-header {
    padding-top: 5rem;
  }

  .page-header h1 {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .process-step {
    width: 100%;
  }

  .nav-buttons {
    position: static;
    flex-direction: row;
    justify-content: center;
    margin-bottom: 1rem;
    margin-top: 1rem;
  }

  .nav-button {
    font-size: 0.9rem;
    padding: 12px 18px;
  }
  .back-button {
    font-size: 0.85rem;
    padding: 10px 14px;
    margin: 1rem auto;
    display: block;
    text-align: center;
    position: static;
  }

  .launch-button {
    bottom: 15px;
    right: 15px;
    padding: 10px 14px;
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .nav-buttons {
    flex-direction: column;
    align-items: center;
  }

  .nav-button {
    width: 80%;
    margin: 0.3rem 0;
    font-size: 1rem;
    padding: 14px 20px;
  }

  .back-button {
    font-size: 0.9rem;
    padding: 10px 14px;
  }

  .hero-image {
    aspect-ratio: 4 / 3;
  }
}

/* Prototype Section */
.prototype-section {
  margin-top: 4rem;
}

.prototype-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
}

.prototype-image {
  flex: 1;
  min-width: 300px;
}

.prototype-image img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 6px 12px rgba(0,0,0,0.08);
  transition: transform 0.3s ease;
}

.prototype-image img:hover {
  transform: scale(1.02);
}

.prototype-details {
  flex: 1;
}

.prototype-details h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.prototype-details p {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.prototype-button {
  display: inline-block;
  background-color: var(--accent-color);
  color: white;
  padding: 10px 16px;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.prototype-button:hover {
  background-color: #0071a8;
}

/* Responsive */
@media (max-width: 768px) {
  .prototype-grid {
    flex-direction: column;
  }
}