/* Color Scheme */
:root {
  --color-white: #FFFFFF;
  --color-blue: #9BBEC7;
  --color-orange: #FFB3DF;
  --color-pink: #FE938C;
  --color-green: #BBDD95;
  --color-dark: #333333;
  --color-gray: #666666;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-white);
}

/* Navigation Bar */
.navbar {
  background-color: var(--color-white);
  border-bottom: 3px solid var(--color-blue);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-dark);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: var(--color-gray);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  transition: all 0.3s ease;
}

.nav-link:hover {
  background-color: var(--color-blue);
  color: var(--color-white);
}

.nav-link.active {
  background-color: var(--color-blue);
  color: var(--color-white);
}

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

/* Homepage Styles */
.page-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--color-dark);
}

.page-subtitle {
  font-size: 1.2rem;
  color: var(--color-gray);
  margin-bottom: 3rem;
}

.test-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.test-card {
  background: var(--color-white);
  border-radius: 10px;
  padding: 2rem;
  text-decoration: none;
  color: var(--color-dark);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 3px solid;
}

.test-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.test-card.test1 {
  border-color: var(--color-blue);
}

.test-card.test2 {
  border-color: var(--color-orange);
}

.test-card.test3 {
  border-color: var(--color-pink);
}

.test-card.test4 {
  border-color: var(--color-green);
}

.test-card h2 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.test-card p {
  color: var(--color-gray);
}

/* Slideshow Container */
.slideshow-section {
  margin-top: 2rem;
}

.slideshow-container {
  position: relative;
  max-width: 100%;
  margin: 0 auto;
  background-color: #f5f5f5;
  border-radius: 10px;
  overflow: hidden;
}

.slide {
  display: none;
  position: relative;
  width: 100%;
}

.slide.active {
  display: block;
}

.slide img {
  width: 100%;
  height: auto;
  display: block;
  max-height: 70vh;
  object-fit: contain;
}

/* Slideshow Controls */
.slide-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: var(--color-white);
}

.slide-btn {
  background-color: var(--color-blue);
  color: var(--color-white);
  border: none;
  padding: 0.8rem 1.5rem;
  font-size: 1rem;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  font-weight: 600;
}

.slide-btn:hover:not(:disabled) {
  background-color: #7da9b3;
}

.slide-btn:disabled {
  background-color: #ccc;
  cursor: not-allowed;
}

.slide-counter {
  font-size: 1rem;
  color: var(--color-gray);
  font-weight: 500;
}

/* No Images Message */
.no-images {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--color-gray);
}

.no-images h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.no-images p {
  font-size: 1rem;
  line-height: 1.8;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
  }

  .container {
    padding: 0 1rem;
  }

  .page-title {
    font-size: 2rem;
  }

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

  .slide-controls {
    flex-direction: column;
    gap: 1rem;
  }

  .slide-btn {
    width: 100%;
  }
}

/* Touch Support */
@media (hover: none) and (pointer: coarse) {
  .nav-link:hover {
    background-color: transparent;
    color: var(--color-gray);
  }

  .nav-link:active {
    background-color: var(--color-blue);
    color: var(--color-white);
  }

  .test-card:hover {
    transform: none;
  }

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