:root {
  --bg: #ffffff;
  --fg: #000000;
  --muted: #444444;
  --border: #888888;
  --warning-bg: #eeeeee;
  --greyed: #a0a0a0;
  --link: #000000;
}

[data-theme="dark"] {
  --bg: #000000;
  --fg: #ffffff;
  --muted: #bbbbbb;
  --border: #666666;
  --warning-bg: #1a1a1a;
  --greyed: #555555;
  --link: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.55;
}

a {
  color: var(--link);
  text-decoration: underline;
}

.content {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0.75rem 1.25rem 4rem;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.tabs {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.tab {
  color: var(--fg);
  text-decoration: none;
  padding: 0.25rem 0.4rem;
}

.tab.active {
  font-weight: bold;
  border-bottom: 3px solid var(--fg);
}

.topbar-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

button {
  font: inherit;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--fg);
  padding: 0.2rem 0.6rem;
  cursor: pointer;
}

.button-link {
  font: inherit;
  color: var(--fg);
  border: 1px solid var(--fg);
  padding: 0.2rem 0.6rem;
  text-decoration: none;
  display: inline-block;
}

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

.item {
  display: flex;
  gap: 0.6rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border);
}

.item-body {
  flex: 1 1 auto;
  min-width: 0;
}

.item .comments {
  margin-left: auto;
  align-self: flex-end;
}

.item.greyed {
  color: var(--greyed);
}

.item.greyed a {
  color: var(--greyed);
}

.rank {
  color: var(--muted);
  min-width: 2.2rem;
}

.item-title {
  font-size: 1.15rem;
  line-height: 1.35;
}

.item-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.15rem;
}

.item-actions {
  margin-top: 0.35rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
}

/* Kindle browsers ignore flex gap, so adjacent buttons touch; collapse
   the doubled border between them to 1px. */
.item-actions > * + *,
.topbar-actions > * + * {
  margin-left: -1px;
}

.pager {
  display: flex;
  justify-content: space-between;
  margin-top: 1.2rem;
  color: var(--muted);
}

.empty,
.hint {
  color: var(--muted);
  margin-top: 1.5rem;
}

.warning {
  background: var(--warning-bg);
  border-left: 4px solid var(--fg);
  padding: 0.6rem 0.8rem;
}

.flash-group {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 1000;
  max-width: 24rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: opacity 0.5s;
}

.flash-group.fade {
  opacity: 0;
}

.flash {
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  cursor: pointer;
}

.flash-error {
  border: 2px solid var(--fg);
  font-weight: bold;
}

.article-header h1 {
  margin: 0.8rem 0 0.3rem;
  font-size: 1.6rem;
  line-height: 1.3;
}

.article-body {
  margin-top: 1.4rem;
  font-size: 1.05rem;
}

.article-body img {
  max-width: 100%;
  height: auto;
}

.article-body pre {
  overflow-x: auto;
  background: var(--warning-bg);
  padding: 0.6rem;
}

.article-body blockquote {
  border-left: 3px solid var(--border);
  margin-left: 0;
  padding-left: 1rem;
  color: var(--muted);
}

.article-body table {
  border-collapse: collapse;
}

.article-body td,
.article-body th {
  border: 1px solid var(--border);
  padding: 0.3rem 0.6rem;
}

.back-link {
  margin-top: 0.8rem;
}

.back-to-top {
  margin-top: 2rem;
}

.content-auth {
  display: flex;
  justify-content: center;
  padding-top: 4rem;
}

.auth-box {
  width: 20rem;
}

.auth-title {
  margin-bottom: 0.2rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 1rem;
}

.login-form input {
  font: inherit;
  padding: 0.45rem 0.5rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
}

.login-form button {
  margin-top: 0.6rem;
  padding: 0.5rem;
}

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