.c-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elevation-1);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.c-card-title {
  margin: 0 0 var(--space-md);
}

.c-hero-panel {
  max-width: var(--hero-panel-maxw);
}

.c-hero-title {
  margin: 0;

}

.c-hero-subtitle {
  margin-top: var(--space-sm);
  margin-bottom: 0;
}

.c-sidebar-box {
  position: relative;
  background: var(--sidebar-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevation-2);
  padding: var(--space-lg);
}

.c-sidebar-label {
  position: absolute;
  top: var(--space-lg);
  left: var(--sidebar-label-offset-x);

  padding: var(--sidebar-label-pad-y) var(--sidebar-label-pad-x);
  border-radius: var(--radius-label);
  text-align: center;

  writing-mode: vertical-rl;
  transform: rotate(180deg);

  background: var(--sidebar-label-bg);
  color: var(--sidebar-label-text);

  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: var(--sidebar-label-tracking);
}

.c-sidebar-content {
  margin-left: var(--sidebar-content-ml);
}

@media (max-width: 62rem) {
  .c-sidebar-label {
    position: static;
    writing-mode: horizontal-tb;
    transform: none;
    width: auto;
    margin-bottom: var(--space-sm);
  }
}

.c-notice-section {
  margin-bottom: var(--space-md);
}

.c-notice-title {
  font-size: var(--fs-small);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  opacity: 0.85;
}

.c-notice-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.c-notice-list li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.3rem;
}

.c-notice-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  opacity: 0.5;
}

.c-notice-expired {
  opacity: 0.65;
}

.c-notice-expired .c-notice-list li {
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}

.c-update-time {
  margin-top: var(--space-md);
  font-size: var(--fs-small);
  opacity: 0.6;
  font-style: italic;
}

.c-list {
  padding-left: 1.2rem;
  margin: 0;
}

.c-list li {
  margin-bottom: 0.4rem;
}

.c-footer-link {
  color: var(--color-primary);
  text-decoration: none;
}

.c-footer-link:hover {
  text-decoration: underline;
}

.c-nav {
  display: block;
}

.c-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.c-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

.c-nav-item {
  position: relative;
}

:is(a, button).c-nav-link {
  display: block;
  padding: var(--nav-link-py) var(--nav-link-px);
  font-weight: 600;
  text-decoration: none;
}

button.c-nav-link {
  appearance: none;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

:is(a, button).c-nav-link:focus-visible,
.c-nav-sublink:focus-visible,
.c-meta-nav-link:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

.c-nav-sublist {
  list-style: none;
  margin: 0;
  padding: var(--nav-sublist-py) 0;
  position: absolute;
  left: 0;
  top: 100%;
  min-width: var(--nav-sublist-minw);
  display: none;
  z-index: var(--z-dropdown, 50);
}

.c-nav-item:hover > .c-nav-sublist,
.c-nav-item:focus-within > .c-nav-sublist {
  display: block;
}

.c-nav-sublink {
  display: block;
  padding: var(--nav-sublink-py) var(--nav-sublink-px);
  text-decoration: none;
  font-weight: 500;
}

@media (max-width: 48rem) {
  .c-nav-link {
    padding: var(--nav-link-py-sm) var(--nav-link-px-sm);
  }
}

.c-nav-toggle {
  appearance: none;
  border: 0;
  padding: 0;
  margin: 0;

  width: var(--nav-toggle-size);
  height: var(--nav-toggle-size);

  display: none;
  align-items: center;
  justify-content: center;

  border-radius: var(--nav-toggle-radius);
  cursor: pointer;

  transition: transform var(--motion-fast) var(--ease-standard);
}

.c-nav-toggle:active {
  transform: translateY(1px);
}

.c-nav-toggle-lines {
  display: grid;
  gap: var(--nav-toggle-gap);
}

.c-nav-toggle-lines span {
  display: block;
  width: var(--nav-toggle-line-w);
  height: var(--nav-toggle-line-h);
  border-radius: 999px;

  transition:
    transform var(--motion-normal) var(--ease-standard),
    opacity var(--motion-fast) var(--ease-standard);
}

.c-nav-toggle[aria-expanded="true"] .c-nav-toggle-lines span:nth-child(1) {
  transform: translateY(calc(var(--nav-toggle-gap) + var(--nav-toggle-line-h))) rotate(45deg);
}

.c-nav-toggle[aria-expanded="true"] .c-nav-toggle-lines span:nth-child(2) {
  opacity: 0;
}

.c-nav-toggle[aria-expanded="true"] .c-nav-toggle-lines span:nth-child(3) {
  transform: translateY(calc(-1 * (var(--nav-toggle-gap) + var(--nav-toggle-line-h)))) rotate(-45deg);
}

.c-nav-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--nav-drawer-z);

  display: none;
  pointer-events: none;
}

.c-nav-drawer.is-open {
  pointer-events: auto;
}

.c-nav-drawer-backdrop {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--motion-normal) var(--ease-standard);
}

.c-nav-drawer.is-open .c-nav-drawer-backdrop {
  opacity: 1;
}

.c-nav-drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: var(--nav-drawer-w);

  transform: translateX(100%);
  transition: transform var(--motion-normal) var(--ease-standard);

  display: flex;
  flex-direction: column;
}

.c-nav-drawer.is-open .c-nav-drawer-panel {
  transform: translateX(0);
}

.c-nav-drawer-panel .c-nav-list {
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
}

.c-nav-drawer-panel .c-nav-item:not(:last-child)::after {
  content: none;
}

.c-nav-drawer-panel .c-nav-sublist {
  position: static;
  display: block;
  padding: 0;
}

.c-meta-nav {
  display: block;
}

.c-meta-nav-inner {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-md);
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
}

.c-meta-nav-left,
.c-meta-nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.c-meta-nav-link {
  display: inline-block;
  text-decoration: none;
  padding: 0.15rem 0.1rem;
  font-size: var(--fs-small);
}

.c-site-header {
  display: block;
}

.c-site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.c-site-header-main {
  min-width: 0;
}

.c-site-header-title {
  margin: 0;
  line-height: 2.25;
  font-size: 22px;
}

.c-site-header-subtitle {
  margin-top: var(--space-xs);
  font-size: var(--fs-small);
  line-height: 1.4;
  opacity: 0.75;
}

.c-site-header-aside {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.c-site-header-logo {
  display: block;
  height: var(--site-logo-h);
  width: auto;
}

@media (max-width: 48rem) {
  .c-site-header-title {
    padding: 0.5rem;
    line-height:1.5rem;
    font-size: 1rem;
  }

  .c-meta-nav {
    display: none;
  }

  .c-nav {
    display: none;
  }

  .c-nav-toggle {
    display: inline-flex;
  }

  .c-nav-drawer {
    display: block;
  }

  .c-site-header-inner {
    display: grid;
    grid-template-columns: var(--nav-toggle-size) 1fr var(--nav-toggle-size);
    align-items: center;
    gap: var(--header-bar-gap);
  }

  .c-site-header-main {
    text-align: center;
  }

  .c-site-header-aside:empty {
    min-height: 1px;
  }

  .c-site-header-aside {
    display: none;
  }
}

@media (min-width: 48.001rem) {
  .c-nav-toggle {
    display: none;
  }

  .c-nav-drawer {
    display: none;
  }
}