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

body, html {
  font-family: 'Segoe UI', sans-serif;
  background-color: #0c1a2c;
  color: white;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

.panel {
  height: 100vh;
  padding: 80px 10%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-top: 1px solid #444;
}

.side-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  right: 15px;
  display: flex;
  flex-direction: column;
  z-index: 1000;
}

.side-nav a {
  color: gold;
  text-decoration: none;
  margin: 10px 0;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.05);
  padding: 6px 10px;
  border-radius: 6px;
  transition: 0.3s;
}

.side-nav a:hover {
  background: gold;
  color: #0c1a2c;
}

.content {
  max-width: 800px;
  text-align: center;
}

.content h1, .content h2 {
  color: gold;
  margin-bottom: 20px;
}

ul {
  list-style: none;
}

form input, form textarea {
  width: 100%;
  margin: 10px 0;
  padding: 10px;
  font-size: 16px;
}

form button {
  background: gold;
  color: #0c1a2c;
  padding: 10px 20px;
  border: none;
  font-weight: bold;
  cursor: pointer;
}

.addons-layout {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  justify-content: center;
  flex-wrap: wrap;
}

.addons-list {
  flex: 1;
  max-width: 600px;
}

.addon {
  background: rgba(255, 255, 255, 0.05);
  padding: 20px;
  margin-bottom: 20px;
  border-left: 4px solid gold;
  transition: all 0.3s;
}

.addon h3 {
  margin-bottom: 10px;
}

.addon-info {
  display: none;
  margin-top: 10px;
  font-size: 14px;
  color: #ccc;
}

.addon-info.visible {
  display: block;
}

.addon-categories {
  min-width: 200px;
}

.addon-categories h4 {
  color: gold;
  margin-bottom: 10px;
}

.addon-categories ul {
  list-style: none;
}

.addon-categories li {
  margin: 5px 0;
  color: white;
  font-size: 15px;
}

.fade-in {
  animation: fadeIn 1s ease both;
}

.slide-left {
  animation: slideLeft 1s ease both;
}

.slide-right {
  animation: slideRight 1s ease both;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideLeft {
  from { opacity: 0; transform: translateX(-100px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideRight {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}