* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: #292929;
  font-family: 'Roboto', sans-serif;
  color: white;
  overflow-x: hidden;
}
/* ---------- Top links ---------- */
.social-icons {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px;
  z-index: 1000;
  background: rgba(41, 41, 41, 0.8);
  backdrop-filter: blur(1px);
  -webkit-backdrop-filter: blur(1px);
}
.social-icons a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: white;
  font-size: 20px;
  text-decoration: none;
  transition: color 0.3s ease;
}
.social-icons a:hover,
.social-icons a:focus {
  color: #91C01D;
  outline: none;
}
.icon {
  width: 1em;
  height: 1em;
  fill: currentColor;
  flex-shrink: 0;
}

a {
  color: #91C01D;
  text-decoration: none !important;
}

/* ---------- Header / about ---------- */
header {
  max-width: 900px;
  margin: 20px auto 40px auto;
  padding: 100px 10px 0 10px;
  text-align: right;
}
header h1 {
  margin: 0;
  font-weight: 700;
  font-size: 64px;
}
header h2 {
  margin: 5px 0 0 0;
  font-weight: 400;
  font-size: 42px;
  color: #cccccc;
}
.about {
  max-width: 900px;
  margin: 0 auto 40px auto;
  padding: 0 10px;
  font-size: 15px;
  line-height: 1.6;
  color: #ddd;
}
p {
  font-size: 15px;
  line-height: 1.6;
  color: #ddd;
  text-align: justify;
}

.img-tilted-bg {
  position: absolute;
  top: -50px;
  left: 20%;
  transform: translateX(-50%) rotate(45deg);
  opacity: 0.1;
  z-index: -20;
  pointer-events: none;
  width: 600px;
  max-width: 100%;
  height: auto;
}

/* ---------- Page tabs ---------- */
.page-tabs {
  max-width: 900px;
  margin: 0 auto 30px auto;
  padding: 0 10px;
  display: flex;
  gap: 8px;
  border-bottom: 1px solid #444;
}
.page-tabs a {
  color: #ccc;
  font-size: 20px;
  padding: 12px 18px;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  transition: color 0.2s, border-color 0.2s;
}
.page-tabs a:hover,
.page-tabs a:focus {
  color: #fff;
  outline: none;
}
.page-tabs a[aria-current="page"] {
  color: #91C01D;
  border-color: #91C01D;
}

/* ---------- Project blocks ---------- */
.container {
  max-width: 900px;
  margin: 0 auto 40px auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding: 0 10px;
}
.block {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}
.block.normal {
  flex-direction: row;
}
.block.reversed {
  flex-direction: row-reverse;
}

.video-container, .content {
  flex: 1 1 300px;
  max-width: 450px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
video {
  width: 100%;
  height: auto;
  aspect-ratio: 852 / 480; /* reserves space so the page doesn't jump while videos load */
  display: block;
  background: #1f1f1f;
}
.content h2 {
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 4px 0;
}
.content p {
  margin: 4px 0 4px 0;
}

.techCategory {
  color: rgb(163, 163, 163);
}

/* ---------- Mobile ---------- */
@media (max-width: 600px) {
  .social-icons {
    position: static;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 15px;
    gap: 15px;
  }
  header {
    text-align: center;
    margin: 20px 10px 30px 10px;
    padding-top: 0;
  }
  header h1 {
    font-size: 36px;
  }
  header h2 {
    font-size: 24px;
  }
  .page-tabs {
    margin: 0 10px 30px 10px;
    justify-content: center;
  }
  .page-tabs a {
    font-size: 17px;
    padding: 10px 14px;
  }
  .about {
    font-size: 13px;
    margin: 0 10px 30px 10px;
  }
  .block {
    flex-direction: column !important;
  }
  .video-container, .content {
    max-width: 100%;
    flex: 1 1 100%;
  }
  .content h2 {
    font-size: 16px;
    margin-bottom: 15px;
  }
}