@charset "UTF-8";

:root {
  --main-color: #93bcff;
  --sub-color: #6a7599;
  --gray-color: #aaa;
  --glass-bg: rgba(255,255,255,0.25);
  --glass-border: rgba(255,255,255,0.3);
  --glass-blur: blur(12px);
}

header + div.container_layout,
header + section.container_layout,
header + article.container_layout {
  min-height: calc(100vh - 190px);
}

header {
  position: sticky;
  top: 0;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
}

header .container_layout {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
}
header .nav a { color: #000; }

header .side_area { display: flex; align-items: center; gap: 1rem; }
header .side_area a { color: #000; }

.container_layout {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
  background: var(--glass-bg);
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.side_navbar {
  width: 220px;
  background-color: #ddd;
  color: #000;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  overflow-y: auto;
}
.side_navbar .title {
  padding: 20px;
  background-color: var(--sub-color);
  color: #fff;
}
.side_navbar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.side_navbar ul li a {
  display: block;
  padding: 15px 20px;
  color: #000;
  text-decoration: none;
}
.side_navbar ul li a:hover,
.side_navbar ul li.selected > a {
  background-color: var(--gray-color);
  color: #fff;
}

footer {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--glass-border);
  color: #000;
  padding: 3rem 1rem;
  text-align: center;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-logo {
  max-height: 20px;
  /* filter: invert(70%); */
}

@media (max-width: 768px) {
  header .nav { display: none; }
  .container_layout {
    flex-direction: column;
  }
  .side_navbar {
    position: static;
    width: 100%;
  }
  .footer-content { flex-direction: column-reverse; }
  .footer-logo { margin-top: 1rem; }
}