/* Rick Steves Web Reader — Refined Minimalist Stylesheet */
:root {
  --rs-bg: #f6f7f9;
  --rs-surface: #ffffff;
  --rs-btn-bg: #f3f4f6;
  --rs-text: #181a1d;
  --rs-text-muted: #646d78;
  --rs-border: #dfe3e8;
  --rs-accent: #1d4ed8;
  --rs-ui-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --rs-font-scale: 1;
}

html[data-theme="dark"] {
  --rs-bg: #111317;
  --rs-surface: #181b21;
  --rs-btn-bg: #22262f;
  --rs-text: #e5e7eb;
  --rs-text-muted: #94a3b8;
  --rs-border: #2b303c;
  --rs-accent: #60a5fa;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}

body.rs-reader-body,
body.rs-index-body {
  margin: 0 !important;
  padding: 0 !important;
  background-color: var(--rs-bg);
  color: var(--rs-text);
  font-family: "SourceSansPro-Regular", var(--rs-ui-font);
  line-height: 1.6;
  overflow-x: clip;
}

/* Slim, Vertically Centered Sticky Top Bar (1-Row on Home, 2-Row in Book) */
.rs-topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--rs-surface);
  font-family: var(--rs-ui-font);
}

.rs-topbar-row {
  height: 38px;
  border-bottom: 1px solid var(--rs-border);
  display: flex;
  align-items: center;
}

.rs-topbar-inner {
  width: 100%;
  max-width: 960px;
  height: 100%;
  margin: 0 auto;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.rs-topbar-group {
  display: flex;
  align-items: center;
  gap: 5px;
  margin: 0;
  padding: 0;
}

.rs-brand-link {
  font-weight: 600;
  color: var(--rs-text) !important;
  font-size: 13px;
  line-height: 1;
  text-decoration: none !important;
  white-space: nowrap;
}

.rs-brand-link:hover {
  color: var(--rs-accent) !important;
}

.rs-topbar-title {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  font-size: 12.5px;
  line-height: 1;
  color: var(--rs-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 8px;
  margin: 0;
}

.rs-topbar-book {
  font-weight: 600;
  color: var(--rs-text);
  font-size: 12.5px;
  line-height: 1;
}

.rs-topbar-sep {
  opacity: 0.6;
}

.rs-topbar-chap {
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Compact, Vertically Centered Text Buttons */
.rs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 24px;
  padding: 0 8px;
  margin: 0;
  font-size: 12px;
  font-family: var(--rs-ui-font);
  font-weight: 500;
  line-height: 1;
  color: var(--rs-text) !important;
  background-color: var(--rs-btn-bg);
  border: 1px solid var(--rs-border);
  border-radius: 5px;
  text-decoration: none !important;
  cursor: pointer;
  white-space: nowrap;
}

.rs-btn:hover {
  border-color: var(--rs-accent);
  color: var(--rs-accent) !important;
}

.rs-btn-disabled {
  opacity: 0.35;
  pointer-events: none;
}

/* Slide-out TOC Drawer */
.rs-drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: rgba(0, 0, 0, 0.45);
}

.rs-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(340px, 86vw);
  z-index: 1200;
  background-color: var(--rs-surface);
  border-right: 1px solid var(--rs-border);
  display: flex;
  flex-direction: column;
  font-family: var(--rs-ui-font);
  transform: translateX(-102%);
  transition: transform 0.18s ease-out;
}

.rs-drawer.is-open {
  transform: translateX(0);
}

.rs-drawer-header {
  padding: 10px 14px;
  border-bottom: 1px solid var(--rs-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.rs-drawer-book-title {
  font-weight: 700;
  font-size: 0.92rem;
}

.rs-drawer-book-meta {
  font-size: 0.76rem;
  color: var(--rs-text-muted);
}

.rs-drawer-quicklinks {
  padding: 8px 14px;
  border-bottom: 1px solid var(--rs-border);
  display: flex;
  gap: 6px;
}

.rs-drawer-nav {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 10px 14px 28px;
  font-size: 0.88rem;
}

.rs-drawer-nav ol {
  list-style: none;
  margin: 0;
  padding-left: 0;
}

.rs-drawer-nav ol ol {
  padding-left: 14px;
  margin: 2px 0 4px;
  border-left: 1px solid var(--rs-border);
}

.rs-drawer-nav li {
  margin: 2px 0;
}

.rs-drawer-nav a {
  display: block;
  padding: 5px 8px;
  border-radius: 4px;
  color: var(--rs-text) !important;
  text-decoration: none !important;
}

.rs-drawer-nav a:hover,
.rs-drawer-nav a.is-active {
  background-color: var(--rs-btn-bg);
  color: var(--rs-accent) !important;
}

.rs-drawer-nav a.is-active {
  font-weight: 600;
}

/* Main Reading Column & Homepage Container */
.rs-reader-main,
.rs-index-main {
  max-width: 740px;
  margin: 0 auto;
  padding: 20px 16px 52px;
  font-size: calc(1rem * var(--rs-font-scale, 1));
}

.rs-content {
  background-color: var(--rs-surface);
  border: 1px solid var(--rs-border);
  border-radius: 8px;
  padding: 26px 24px;
  line-height: 1.65;
  overflow-wrap: break-word;
}

.rs-content::after {
  content: "";
  display: table;
  clear: both;
}

.rs-content img {
  max-width: 100% !important;
  height: auto !important;
}

.rs-content div img,
.rs-content figure img,
.rs-content p.cover img {
  cursor: zoom-in;
}

.rs-content a img {
  cursor: pointer;
}

.rs-content .map-image,
.rs-content .ipadfp {
  height: auto !important;
  page-break-after: auto !important;
  margin: 1em auto !important;
  text-align: center;
}

.rs-content .map-image img,
.rs-content .imagefp {
  height: auto !important;
  max-width: 100% !important;
}

.rs-content table {
  max-width: 100%;
  border-collapse: collapse;
}

.rs-table-scroll {
  width: 100%;
  overflow-x: auto;
  margin: 0.8em 0;
}

/* Chapter Footer */
.rs-footer {
  margin-top: 16px;
  padding: 12px 4px 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--rs-ui-font);
  font-size: 0.88rem;
}

.rs-footer a {
  color: var(--rs-accent) !important;
  text-decoration: none !important;
  font-weight: 600;
}

/* Lightbox */
.rs-lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(10, 12, 16, 0.94);
  display: flex;
  flex-direction: column;
}

.rs-lightbox[hidden] {
  display: none !important;
}

.rs-lightbox-bar {
  height: 38px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #181b22;
  border-bottom: 1px solid #2b303c;
  color: #e5e7eb;
  font-family: var(--rs-ui-font);
  font-size: 12.5px;
}

.rs-lightbox-actions {
  display: flex;
  gap: 6px;
}

.rs-lightbox-stage {
  flex: 1 1 auto;
  overflow: auto;
  display: flex;
  padding: 12px;
}

.rs-lightbox-stage img {
  max-width: none;
  height: auto;
  margin: auto;
  background: #ffffff;
}

/* Generic Dark Mode Overrides */
html[data-theme="dark"] .rs-content a,
html[data-theme="dark"] .rs-content .nounder {
  color: var(--rs-accent) !important;
}

html[data-theme="dark"] .rs-content .blue,
html[data-theme="dark"] .rs-content .blue1,
html[data-theme="dark"] .rs-content .noindent_1 {
  color: #67b7dc !important;
}

html[data-theme="dark"] .rs-content .green {
  color: #73daca !important;
}

html[data-theme="dark"] .rs-content .red,
html[data-theme="dark"] .rs-content .ent99,
html[data-theme="dark"] .rs-content .ent100,
html[data-theme="dark"] .rs-content .number {
  color: #ff757f !important;
}

html[data-theme="dark"] .rs-content [class^="sidebar"],
html[data-theme="dark"] .rs-content [class*=" sidebar"],
html[data-theme="dark"] .rs-content .box,
html[data-theme="dark"] .rs-content .covid-19,
html[data-theme="dark"] .rs-content td[class^="table"],
html[data-theme="dark"] .rs-content th[class^="table"] {
  background-color: var(--rs-btn-bg) !important;
  color: var(--rs-text) !important;
  border-color: var(--rs-border) !important;
  box-shadow: none !important;
}

html[data-theme="dark"] .rs-content .table1s,
html[data-theme="dark"] .rs-content .table1s1,
html[data-theme="dark"] .rs-content [class^="table3b1"],
html[data-theme="dark"] .rs-content .table3b2,
html[data-theme="dark"] .rs-content .table3b2a,
html[data-theme="dark"] .rs-content .table3b2b,
html[data-theme="dark"] .rs-content .table3b2c,
html[data-theme="dark"] .rs-content .table3b3 {
  background-color: #263244 !important;
  color: #ffffff !important;
}

html[data-theme="dark"] .rs-content td,
html[data-theme="dark"] .rs-content th,
html[data-theme="dark"] .rs-content .all1,
html[data-theme="dark"] .rs-content .h2b1 {
  border-color: var(--rs-border) !important;
}

html[data-theme="dark"] .rs-content [class^="number2"],
html[data-theme="dark"] .rs-content [class^="numbera"] {
  background-color: #2e3c56 !important;
  color: #ffffff !important;
  border-color: #6178a6 !important;
}

html[data-theme="dark"] .rs-content p:not(.cover) img {
  filter: invert(1) hue-rotate(180deg);
  mix-blend-mode: screen;
}

/* Homepage Book Directory */
.rs-index-header {
  margin-bottom: 14px;
  padding: 0 2px;
  font-family: var(--rs-ui-font);
}

.rs-index-header h1 {
  margin: 0 0 2px;
  font-size: 1.25em;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.rs-index-header p {
  margin: 0;
  font-size: 0.85em;
  color: var(--rs-text-muted);
}

.rs-book-list {
  list-style: none;
  margin: 0;
  padding: 0;
  background-color: var(--rs-surface);
  border: 1px solid var(--rs-border);
  border-radius: 8px;
  overflow: hidden;
  font-family: var(--rs-ui-font);
}

.rs-book-list li {
  border-bottom: 1px solid var(--rs-border);
}

.rs-book-list li:last-child {
  border-bottom: none;
}

.rs-book-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  color: var(--rs-text) !important;
  text-decoration: none !important;
  font-weight: 600;
  transition: background-color 0.1s ease, color 0.1s ease;
}

.rs-book-list a:hover {
  background-color: var(--rs-btn-bg);
  color: var(--rs-accent) !important;
}

.rs-book-meta {
  font-size: 0.8em;
  font-weight: 500;
  color: var(--rs-text-muted);
  background-color: var(--rs-btn-bg);
  border: 1px solid var(--rs-border);
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

@media (max-width: 680px) {
  .rs-topbar-title {
    display: none;
  }

  .rs-content {
    padding: 18px 14px;
  }

  .rs-content .vertical,
  .rs-content .horizontal,
  .rs-content .square,
  .rs-content [class^="width"] {
    width: 98% !important;
    margin-left: 1% !important;
    margin-right: 1% !important;
  }
}