html,
body {
  margin: 0;
  padding: 0;
  /* American-flag-inspired blue/red gradient background */
  background: linear-gradient(90deg, #041e42 20%, #9b1c2c 100%);
  background-attachment: fixed;
}

.main-header {
  background: linear-gradient(90deg, #041e42 20%, #9b1c2c 100%);
  padding-top: 20px;
  padding-bottom: 0;
  position: relative;
  overflow: hidden;
}

.hero-stars {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.hero-stars span {
  position: absolute;
  color: white;
  font-size: 25px;
  opacity: 0.9;
  animation: moveStarsRight 3s infinite alternate ease-in-out;
}

@keyframes moveStarsRight {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(15px);
  }
}

.title {
  text-align: center;
  margin: 0;
  font-size: 6em;
  font-family: "Helvetica";
  font-weight: normal;
  color: #F4E3B2;
  position: relative;
  z-index: 1;
}

#card-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin: 20px;
}

.card-description {
  margin: 8px 0;
  font-size: 14px;
  line-height: 1.4;
}

.card {
  width: 300px;
  border: 3.5px solid transparent;
  border-radius: 30px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  margin: 5px;
  background:
    linear-gradient(white, white) padding-box,
    repeating-linear-gradient(-45deg,
      #9b1c2c, #9b1c2c 15px,
      #ffffff 15px, #ffffff 30px,
      #041e42 30px, #041e42 45px,
      #ffffff 45px, #ffffff 60px) border-box;
}

.card-content {
  padding: 20px;
  font-family: "Verdana";
  color: #777;
}

.card-content h2 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 20px;
  min-height: 56px;
}

.card-content ul {
  margin: 4px 0;
  padding-left: 24px;
}

.card img {
  display: block;
  width: 100%;
  height: 240px;
  object-fit: contain;
}

.card {
  cursor: pointer;
}

.card:hover {
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.18);
}

#controls-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
  padding: 5px 20px 5px 20px;
  font-family: "Verdana";
  background: transparent;
  position: relative;
  z-index: 1;
}

#search-input,
#category-select {
  font-family: "Verdana";
  font-size: 15px;
  color: #777;
  padding: 8px 12px;
  border: 1px solid #ccc;
  border-radius: 5px;
  background: white;
}

#search-input {
  min-width: 220px;
}

.empty-state {
  font-family: "Verdana";
  font-size: 14px;
  color: #999;
  text-align: center;
  padding: 40px 20px;
  width: 100%;
}

#detail-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.3);
  z-index: 100;
}

#detail-overlay.visible {
  display: flex;
  align-items: center;
  justify-content: center;
}

#detail-panel {
  background: white;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  padding: 20px;
  font-family: "Verdana";
  color: #777;
}

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.detail-header h2 {
  margin: 0;
  font-size: 20px;
  color: #777;
}

#detail-panel button {
  font-size: 14px;
  height: 32px;
  padding: 0 12px;
}

#detail-carousel {
  position: relative;
  margin-bottom: 12px;
}

#detail-image,
#detail-video {
  width: 100%;
  max-height: 48vh;
  height: auto;
  object-fit: contain;
  display: block;
}

#detail-carousel button {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.4);
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 22px;
  width: 30px;
  height: 40px;
  padding: 0;
  margin: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

#carousel-prev {
  left: 6px;
}

#carousel-next {
  right: 6px;
}

#carousel-counter {
  position: absolute;
  bottom: 5px;
  right: 6px;
  background: rgba(0, 0, 0, 0.45);
  color: white;
  font-family: "Verdana";
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 3px;
  pointer-events: none;
}

#detail-meta,
#detail-achievement,
#detail-long-desc,
#detail-tech {
  font-size: 14px;
  line-height: 1.5;
  margin: 6px 0;
}

#detail-highlights {
  margin: 8px 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.6;
}

#detail-links {
  margin-top: 16px;
  border-top: 1px solid #eee;
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#detail-links a {
  color: #0077b5;
  text-decoration: none;
  font-size: 14px;
  font-weight: bold;
  font-family: "Verdana";
}

#detail-links a:hover {
  text-decoration: underline;
}

.footer {
  display: flex;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.3);
  padding: 10px;
}

button {
  text-align: center;
  background-color: #666;
  border: none;
  padding-left: 10px;
  padding-right: 10px;
  height: 40px;
  border-radius: 10px;
  color: white;
  font-size: 22px;
  cursor: pointer;
  margin: 5px;
}