:root {
  --bg: #dedede;
  --bg-elev: #e3e3e3;
  --bg-elev-2: #e8e8e8;
  --text: #1a1a1a;
  --text-soft: #404040;
  --text-muted: #595959;
  --line: rgba(0, 0, 0, 0.08);
  --line-strong: rgba(0, 0, 0, 0.14);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  --radius: 18px;
  --transition: 180ms ease;
}

html[data-theme="dark"] {
  --bg: #181818;
  --bg-elev: #1c1c1c;
  --bg-elev-2: #212121;
  --text: #cccccc;
  --text-soft: #a8a8a8;
  --text-muted: #7d7d7d;
  --line: #2b2b2b;
  --line-strong: #3c3c3c;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background var(--transition), color var(--transition);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.92em;
  background: var(--bg-elev-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.15rem 0.4rem;
}

.container-wide {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}

.container-narrow {
  width: min(720px, calc(100% - 32px));
  margin: 0 auto;
}

.site-shell {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

main {
  flex-grow: 1;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand__mark {
  width: 18px;
  height: 18px;
  background-color: var(--text);
  -webkit-mask: url("../icons/brand-mark.svg") no-repeat center / contain;
  mask: url("../icons/brand-mark.svg") no-repeat center / contain;
}

.brand__text {
  font-size: 0.98rem;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: var(--bg-elev);
  color: var(--text);
  border-radius: 999px;
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  font: inherit;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.icon-btn:hover {
  transform: translateY(-1px);
}

.btn {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: var(--text);
  color: var(--bg);
  border-radius: 999px;
  padding: 0.78rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), opacity var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--ghost {
  background: var(--bg-elev);
  color: var(--text);
}

.archive-layout {
  display: block;
  padding: 28px 0 48px;
}

.notice-layout {
  display: block;
  padding: 28px 0 56px;
}

.content-panel,
.article-panel {
  min-width: 0;
}

.archive-hero,
.article-panel,
.notice-card,
.empty-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.archive-hero {
  padding: clamp(20px, 4vw, 28px) clamp(20px, 4vw, 30px) clamp(18px, 4vw, 24px);
  margin-bottom: 18px;
}

.archive-hero__divider {
  height: 1px;
  background: var(--line);
  margin: 18px 0;
}

.hero-title {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.1rem);
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.archive-controls {
  display: block;
}

.search-block {
  max-width: 560px;
}

.input {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: var(--bg-elev-2);
  color: var(--text);
  padding: 0.9rem 1rem;
  font: inherit;
  outline: none;
}

.input:focus {
  border-color: var(--text-muted);
}

.archive-results {
  margin: 10px 0 0;
  color: var(--text-soft);
  font-size: 0.98rem;
}

.section-title {
  margin: 0;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  color: var(--text-soft);
}

.notice-list {
  display: grid;
  gap: 20px;
}

.notice-card {
  display: block;
  padding: clamp(18px, 4vw, 24px); 
  transition: transform var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.notice-card:hover {
  transform: translateY(-5px);
  border-color: var(--line-strong);
  box-shadow: 0 15px 35px rgba(0,0,0,0.08);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.tag-pill {
  --tag-color: var(--text-muted);

  display: inline-block;
  font-size: clamp(10px, 2.5vw, 12px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 12px;
  border-radius: 50px;
  line-height: 1.2;

  color: color-mix(in srgb, var(--tag-color) 20%, #000000);
  border: 1.5px solid color-mix(in srgb, var(--tag-color) 20%, #000000);
  background: var(--tag-color);
}

html[data-theme="dark"] .tag-pill {
  color: var(--tag-color);
  border: 1.5px solid var(--tag-color);
  background: color-mix(in srgb, var(--tag-color) 15%, transparent);
}

.notice-card__title {
  margin: 0 0 8px;
  font-size: clamp(1.15rem, 3.5vw, 1.4rem);
  letter-spacing: -0.015em;
  line-height: 1.3;
  font-weight: 700;
}

.notice-card__date {
  display: block;
  color: var(--text-muted);
  font-size: clamp(11.5px, 2.5vw, 13px);
  font-weight: 500;
  margin-bottom: 16px;
}

.notice-card__summary {
  margin: 0;
  color: var(--text-soft);
  font-size: clamp(13.5px, 3vw, 15px);
  line-height: 1.6;
  
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.empty-card {
  padding: 24px;
}

.article-panel {
  padding: clamp(20px, 5vw, 32px);
}

.article-content {
  width: 100%;
  max-width: none;
  font-size: 1.0625rem;
  line-height: 1.72;
  letter-spacing: -0.01em;
}

.article-content > *:first-child {
  margin-top: 0;
}

.notice-title-block {
  margin-bottom: 1.8rem;
}

.notice-inline-title {
  margin: 0 0 8px;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.notice-date {
  display: block;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
}

.notice-title-divider {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1.2rem 0 0;
}

.article-content h2,
.article-content h3,
.article-content h4 {
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.article-content h2 {
  margin-top: 2.3em;
  margin-bottom: 0.7em;
  font-size: 1.55rem;
}

.article-content h3 {
  margin-top: 1.8em;
  margin-bottom: 0.6em;
  font-size: 1.22rem;
}

.article-content p,
.article-content ul,
.article-content ol,
.article-content blockquote {
  margin: 1em 0;
}

.article-content ul,
.article-content ol {
  padding-left: 1.35em;
}

.article-content hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2em 0;
}

.article-content blockquote {
  margin-left: 0;
  padding: 0.8rem 1rem;
  border-left: 3px solid var(--text-muted);
  background: var(--bg-elev-2);
  border-radius: 0 12px 12px 0;
}

.notice-pagination {
  border-top: 1px solid var(--line);
  margin-top: 32px;
  padding-top: 20px;
}

.notice-pagination__desktop,
.notice-pagination__mobile {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

.notice-pagination__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 16px;
  background: var(--bg-elev-2);
  font-weight: 500;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

a.notice-pagination__link {
  cursor: pointer;
}

a.notice-pagination__link:hover:not(.active) {
  background: var(--line);
}

.notice-pagination__link.active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
  pointer-events: none;
}

.notice-pagination__link[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.45;
}

.notice-pagination__info {
  flex-grow: 1;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.notice-pagination__mobile {
  display: none;
}

.error-layout {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px 0;
}

.intro-block {
  font-size: clamp(1.1rem, 3vw, 1.35rem);
  line-height: 1.6;
  color: var(--text-soft);
  letter-spacing: -0.01em;
  max-width: 500px;
}

.text-link {
  color: var(--text);
  font-weight: 500;
  font-size: 1.05rem;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--line-strong);
  text-decoration-thickness: 2px;
  display: inline-flex;
  align-items: center;
  width: fit-content;
  transition: text-decoration-color var(--transition), color var(--transition);
}

.text-link:hover {
  text-decoration-color: var(--text);
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  animation: revealUp 500ms ease forwards;
}

@keyframes revealUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.text-muted {
  color: var(--text-muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 30px 0;
  text-align: center;
  font-size: 0.9rem;
  background: color-mix(in srgb, var(--bg) 60%, transparent);
}

.footer-link {
  color: var(--text-muted);
  font-weight: 500;
  transition: color var(--transition);
}

.footer-link:hover {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (max-width: 720px) {
  .topbar__inner {
    min-height: 64px;
  }

  .archive-hero,
  .article-panel,
  .notice-card,
  .empty-card {
    border-radius: 16px;
  }

  .notice-pagination__desktop {
    display: none;
  }

  .notice-pagination__mobile {
    display: flex;
    gap: 10px;
  }

  .notice-pagination__link {
    font-size: 0.9rem;
    padding: 0 12px;
    min-height: 40px;
    min-width: 0;
  }
}