/* Color Modes & Variables */
:root,
[data-theme="default"] {
  --text-scale: 1;
  --body-bg: #008080;
  --window-face: #c0c0c0;
  --window-content-bg: #ffffff;
  --bevel-light: #ffffff;
  --bevel-light-soft: #dfdfdf;
  --bevel-dark-soft: #808080;
  --bevel-dark: #404040;
  --text-color: #000000;
  --text-secondary: #404040;
  --text-muted: #606060;
  --titlebar-bg: linear-gradient(90deg, #000080 0%, #1084d0 100%);
  --titlebar-fg: #ffffff;
  --titlebar-inactive: linear-gradient(90deg, #808080 0%, #b5b5b5 100%);
  --link-color: #0000a8;
  --link-visited: #6a006a;
  --shadow: rgba(0, 0, 0, 0.4);
  --focus-outline: 1px dotted #000000;
}

[data-theme="dark"] {
  --text-scale: 1;
  --body-bg: #0d2530;
  --window-face: #3a3a3a;
  --window-content-bg: #2a2a2a;
  --bevel-light: #6e6e6e;
  --bevel-light-soft: #4a4a4a;
  --bevel-dark-soft: #1c1c1c;
  --bevel-dark: #0a0a0a;
  --text-color: #e8e8e8;
  --text-secondary: #c8c8c8;
  --text-muted: #989898;
  --titlebar-bg: linear-gradient(90deg, #000080 0%, #1084d0 100%);
  --titlebar-fg: #ffffff;
  --titlebar-inactive: linear-gradient(90deg, #404040 0%, #606060 100%);
  --link-color: #6cb6ff;
  --link-visited: #c898ff;
  --shadow: rgba(0, 0, 0, 0.7);
  --focus-outline: 1px dotted #ffffff;
}

[data-theme="contrast"] {
  --text-scale: 1;
  --body-bg: #000000;
  --window-face: #ffffff;
  --window-content-bg: #ffffff;
  --bevel-light: #ffffff;
  --bevel-light-soft: #ffffff;
  --bevel-dark-soft: #000000;
  --bevel-dark: #000000;
  --text-color: #000000;
  --text-secondary: #000000;
  --text-muted: #000000;
  --titlebar-bg: #000000;
  --titlebar-fg: #ffffff;
  --titlebar-inactive: #000000;
  --link-color: #0000ee;
  --link-visited: #6a006a;
  --shadow: rgba(0, 0, 0, 0.9);
  --focus-outline: 2px solid #000000;
}

/* Global Reset */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  padding: 0;
  background-color: var(--body-bg);
  color: var(--text-color);
  font-family: "Tahoma", "Segoe UI", "MS Sans Serif", Geneva, sans-serif;
  font-size: 13px;
  min-height: 100vh;
  transition: background-color 0.15s;
}

[data-theme="contrast"] body {
  background-image: none;
}

a {
  color: var(--link-color);
  text-decoration: underline;
}
a:visited { color: var(--link-visited); }
a:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--titlebar-bg);
  color: var(--titlebar-fg);
  padding: 8px 16px;
  text-decoration: none;
  font-weight: bold;
  z-index: 5000;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}

/* Application Layout */
.app-window {
  width: 100%;
  max-width: 920px;
  margin: 16px auto;
  background-color: var(--window-face);
  border: 2px solid;
  border-top-color: var(--bevel-light);
  border-left-color: var(--bevel-light);
  border-right-color: var(--bevel-dark-soft);
  border-bottom-color: var(--bevel-dark-soft);
  box-shadow: 1px 1px 0 var(--bevel-dark), 4px 4px 8px var(--shadow);
}

.app-titlebar {
  background: var(--titlebar-bg);
  color: var(--titlebar-fg);
  padding: 3px 3px 3px 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: bold;
  font-size: 13px;
  margin: 2px;
}

.app-title-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-right: 10px;
}

.app-title-icon {
  display: inline-block;
  width: 16px;
  height: 14px;
  margin-right: 6px;
  vertical-align: middle;
  background: var(--window-face);
  border: 1px solid;
  border-top-color: var(--bevel-light);
  border-left-color: var(--bevel-light);
  border-right-color: var(--bevel-dark-soft);
  border-bottom-color: var(--bevel-dark-soft);
  position: relative;
}
.app-title-icon::after {
  content: "▦";
  position: absolute;
  inset: 0;
  color: var(--text-color);
  font-size: 11px;
  line-height: 12px;
  text-align: center;
}

.window-controls {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}

.window-btn {
  width: 18px;
  height: 16px;
  min-width: 18px;
  padding: 0;
  font-family: "Marlett", "Tahoma", sans-serif;
  font-size: 10px;
  font-weight: bold;
  line-height: 1;
  color: var(--text-color);
  background: var(--window-face);
  border: 1px solid;
  border-top-color: var(--bevel-light);
  border-left-color: var(--bevel-light);
  border-right-color: var(--bevel-dark-soft);
  border-bottom-color: var(--bevel-dark-soft);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.window-btn:active {
  border-top-color: var(--bevel-dark-soft);
  border-left-color: var(--bevel-dark-soft);
  border-right-color: var(--bevel-light);
  border-bottom-color: var(--bevel-light);
}
.window-btn:focus-visible {
  outline: var(--focus-outline);
  outline-offset: -3px;
}

/* Toolbars */
.menubar {
  background: var(--window-face);
  border-bottom: 1px solid var(--bevel-dark-soft);
  padding: 2px 4px;
  margin: 0 2px;
  display: flex;
  gap: 4px;
  font-size: 12px;
}

.menu-item {
  padding: 3px 8px;
  cursor: default;
  user-select: none;
  color: var(--text-color);
}
.menu-item u { text-decoration: underline; }

.toolbar {
  background: var(--window-face);
  margin: 2px 2px 0 2px;
  padding: 4px 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: stretch;
  border-bottom: 1px solid var(--bevel-light);
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 2px 8px 2px 6px;
  border: 1px solid;
  border-top-color: var(--bevel-dark-soft);
  border-left-color: var(--bevel-dark-soft);
  border-right-color: var(--bevel-light);
  border-bottom-color: var(--bevel-light);
  position: relative;
}

.toolbar-group .group-label {
  position: absolute;
  top: -8px;
  left: 6px;
  background: var(--window-face);
  padding: 0 4px;
  font-size: 11px;
  font-weight: normal;
  color: var(--text-secondary);
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

/* User Interface Controls */
.btn,
button {
  font-family: inherit;
  font-size: 12px;
  color: var(--text-color);
  background: var(--window-face);
  border: 2px solid;
  border-top-color: var(--bevel-light);
  border-left-color: var(--bevel-light);
  border-right-color: var(--bevel-dark-soft);
  border-bottom-color: var(--bevel-dark-soft);
  box-shadow: inset 1px 1px 0 var(--bevel-light-soft), inset -1px -1px 0 var(--bevel-dark);
  padding: 4px 12px;
  min-height: 24px;
  min-width: 32px;
  cursor: pointer;
  line-height: 1.2;
}

button:hover { filter: brightness(1.03); }

button:active,
button[aria-pressed="true"] {
  border-top-color: var(--bevel-dark-soft);
  border-left-color: var(--bevel-dark-soft);
  border-right-color: var(--bevel-light);
  border-bottom-color: var(--bevel-light);
  box-shadow: inset 1px 1px 0 var(--bevel-dark), inset -1px -1px 0 var(--bevel-light-soft);
}

button:focus-visible {
  outline: var(--focus-outline);
  outline-offset: -4px;
}

@media (pointer: coarse) {
  button, .btn { min-height: 36px; min-width: 36px; padding: 6px 14px; }
  .window-btn { min-width: 28px; height: 24px; }
  .indicator { min-width: 38px !important; min-height: 32px !important; }
}

/* Slide Content Container */
.workspace {
  margin: 0 2px;
  background: var(--window-face);
  padding: 8px;
}

.slide-container {
  background-color: var(--window-content-bg);
  border: 2px solid;
  border-top-color: var(--bevel-dark-soft);
  border-left-color: var(--bevel-dark-soft);
  border-right-color: var(--bevel-light);
  border-bottom-color: var(--bevel-light);
  box-shadow: inset 1px 1px 0 var(--bevel-dark), inset -1px -1px 0 var(--bevel-light-soft);
  padding: clamp(24px, 5vw, 50px) clamp(20px, 5vw, 60px) clamp(70px, 8vw, 90px) clamp(20px, 5vw, 60px);
  min-height: 60vh;
  position: relative;
  display: none;
  font-family: "Times New Roman", Times, serif;
  color: var(--text-color);
}

.active-slide { display: block; }

.slide-container h1 {
  color: var(--text-color);
  font-size: clamp(22px, 4vw, calc(32px * var(--text-scale)));
  margin: 0 0 5px 0;
}
.slide-container h2 {
  color: var(--text-secondary);
  font-size: clamp(16px, 2.6vw, calc(22px * var(--text-scale)));
  font-weight: normal;
  font-style: italic;
  margin: 0 0 20px 0;
}
.slide-container h3 {
  font-size: clamp(20px, 3.2vw, calc(26px * var(--text-scale)));
  color: var(--text-color);
  border-bottom: 1px solid var(--text-color);
  padding-bottom: 8px;
  margin: 0 0 30px 0;
}
[data-theme="contrast"] .slide-container h3 {
  border-bottom: 2px solid #000000;
}

.point { margin-bottom: 24px; }
.point h4 {
  font-size: clamp(16px, 2.6vw, calc(21px * var(--text-scale)));
  margin: 0 0 4px 0;
  font-weight: bold;
  color: var(--text-color);
}
.point p {
  font-size: clamp(14px, 2.1vw, calc(17px * var(--text-scale)));
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.55;
}
.point ul {
  margin: 8px 0 0 0;
  padding-left: 22px;
  font-size: clamp(14px, 2.1vw, calc(17px * var(--text-scale)));
  color: var(--text-secondary);
  line-height: 1.55;
}
.point ul li { margin-bottom: 4px; }

.works-list {
  list-style: none;
  padding-left: 0;
  margin: 8px 0 0 0;
}
.works-list li {
  margin-bottom: 14px;
  font-size: clamp(14px, 2.1vw, calc(16px * var(--text-scale)));
}
.works-list .meta {
  display: block;
  color: var(--text-muted);
  font-size: 0.92em;
  margin-top: 1px;
}

.title-page p {
  font-size: clamp(15px, 2.2vw, calc(18px * var(--text-scale)));
  line-height: 1.6;
  color: var(--text-secondary);
}

.closing-anchor {
  text-align: center;
  margin-top: clamp(40px, 10vw, 100px);
  margin-bottom: clamp(30px, 6vw, 60px);
}
.closing-anchor .epitaph {
  font-size: clamp(24px, 5vw, calc(36px * var(--text-scale)));
  font-style: italic;
  color: var(--text-color);
  margin-bottom: clamp(24px, 5vw, 50px);
}
.closing-anchor .gloss {
  font-size: clamp(15px, 2.4vw, calc(18px * var(--text-scale)));
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Footer & Pagination */
.slide-footer {
  position: absolute;
  bottom: clamp(20px, 3vw, 30px);
  left: clamp(20px, 5vw, 60px);
  right: clamp(20px, 5vw, 60px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.slide-counter {
  font-family: "Tahoma", "Segoe UI", sans-serif;
  font-size: 12px;
  color: var(--text-muted);
}
[data-theme="contrast"] .slide-counter { color: #000; font-weight: bold; }
.nav-buttons { display: flex; gap: 8px; }

/* In-Dialog Warnings Formatting */
.cw-body {
  padding: clamp(8px, 2vw, 16px) 0;
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.cw-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border: 2px solid;
  border-top-color: var(--bevel-dark-soft);
  border-left-color: var(--bevel-dark-soft);
  border-right-color: var(--bevel-light);
  border-bottom-color: var(--bevel-light);
  background: var(--window-content-bg);
  color: #0000a8;
  font-family: "Times New Roman", serif;
  font-size: 30px;
  font-weight: bold;
  font-style: italic;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
[data-theme="dark"] .cw-icon { color: #6cb6ff; }
[data-theme="contrast"] .cw-icon { color: #000000; }

.cw-content {
  flex: 1;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-color);
}
.cw-content h3 {
  margin: 0 0 8px 0;
  font-size: 15px;
  border: none;
  padding: 0;
}
.cw-content p { margin: 0 0 10px 0; }
.cw-content ul { margin: 6px 0 12px 18px; padding: 0; }
.cw-content li { margin-bottom: 4px; }

.btn-primary {
  font-weight: bold;
  min-width: 80px;
}

/* Status Indicators */
.statusbar {
  margin: 2px 2px 2px 2px;
  background: var(--window-face);
  padding: 4px 6px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  font-family: "Tahoma", "Segoe UI", sans-serif;
  font-size: 11px;
  border-top: 1px solid var(--bevel-light);
}

.status-section {
  border: 1px solid;
  border-top-color: var(--bevel-dark-soft);
  border-left-color: var(--bevel-dark-soft);
  border-right-color: var(--bevel-light);
  border-bottom-color: var(--bevel-light);
  padding: 2px 8px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 22px;
}

.status-section.indicators {
  flex-wrap: wrap;
  flex: 1;
  justify-content: center;
  padding: 3px 6px;
}

.indicator-label {
  font-weight: bold;
  color: var(--text-color);
  margin-right: 4px;
}

.indicator {
  min-width: 26px;
  min-height: 22px;
  padding: 0 4px;
  font-size: 11px;
  line-height: 1;
}

/* Modals */
.dialog {
  display: none;
  position: fixed;
  top: 100px;
  left: 50%;
  transform: translateX(-50%);
  width: 460px;
  max-width: calc(100vw - 32px);
  max-height: calc(100vh - 120px);
  background: var(--window-face);
  border: 2px solid;
  border-top-color: var(--bevel-light);
  border-left-color: var(--bevel-light);
  border-right-color: var(--bevel-dark-soft);
  border-bottom-color: var(--bevel-dark-soft);
  box-shadow: 4px 4px 0 var(--bevel-dark), 6px 6px 16px var(--shadow);
  z-index: 1000;
  font-family: "Tahoma", "Segoe UI", sans-serif;
  font-size: 12px;
  color: var(--text-color);
  flex-direction: column;
}
.dialog.open { display: flex; }
.dialog.dragging { user-select: none; }

.dialog-titlebar {
  background: var(--titlebar-bg);
  color: var(--titlebar-fg);
  padding: 3px 3px 3px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: bold;
  font-size: 13px;
  margin: 2px 2px 0 2px;
  cursor: move;
  flex-shrink: 0;
  user-select: none;
}

.dialog-content {
  padding: 14px 18px 4px 18px;
  overflow-y: auto;
  flex: 1;
}

.dialog-buttonbar {
  padding: 8px 12px 10px 12px;
  margin: 0 2px 2px 2px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  flex-shrink: 0;
}
.dialog-buttonbar::before {
  content: "";
  display: block;
  border-top: 1px solid var(--bevel-dark-soft);
  border-bottom: 1px solid var(--bevel-light);
  margin: -8px -12px 8px -12px;
}

/* Modal Content Modules */
.groupbox {
  margin: 0 0 14px 0;
  padding: 12px 14px 10px 14px;
  border: 1px solid;
  border-top-color: var(--bevel-dark-soft);
  border-left-color: var(--bevel-dark-soft);
  border-right-color: var(--bevel-light);
  border-bottom-color: var(--bevel-light);
  position: relative;
}
.groupbox-legend {
  position: absolute;
  top: -8px;
  left: 10px;
  background: var(--window-face);
  padding: 0 6px;
  font-weight: bold;
  font-size: 12px;
  color: var(--text-color);
}

.help-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.help-table td {
  padding: 4px 6px;
  vertical-align: top;
  color: var(--text-color);
}
.help-table td:first-child {
  font-family: "Courier New", "Consolas", monospace;
  font-weight: bold;
  white-space: nowrap;
  padding-right: 14px;
  width: 1%;
  color: var(--text-color);
}

.source-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.source-list li {
  padding: 5px 0;
  border-bottom: 1px dotted var(--bevel-dark-soft);
  line-height: 1.45;
}
.source-list li:last-child { border-bottom: none; }
.source-list .source-meta {
  display: block;
  color: var(--text-muted);
  font-size: 11px;
  margin-top: 1px;
}

.dialog-tip {
  font-size: 11px;
  color: var(--text-muted);
  margin: 8px 0 0 0;
  padding: 6px 8px;
  border: 1px solid;
  border-top-color: var(--bevel-dark-soft);
  border-left-color: var(--bevel-dark-soft);
  border-right-color: var(--bevel-light);
  border-bottom-color: var(--bevel-light);
  background: var(--window-content-bg);
}
.dialog-tip code {
  background: var(--window-face);
  padding: 0 3px;
  font-size: 11px;
}

/* Responsiveness */
@media (max-width: 720px) {
  .app-window { margin: 0; max-width: 100%; }
  .toolbar { flex-direction: column; align-items: stretch; gap: 10px; }
  .toolbar-group { width: 100%; justify-content: flex-start; }
  .toolbar-actions { margin-left: 0; justify-content: flex-end; }
  .menu-item { padding: 6px 10px; }
  .statusbar { flex-direction: column; align-items: stretch; }
  .status-section.indicators { order: -1; }
  .slide-footer {
    position: static;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--bevel-dark-soft);
  }
  .slide-container { min-height: auto; padding-bottom: 24px; }
  .dialog { width: calc(100vw - 16px); top: 60px; }
  .cw-body { flex-direction: column; align-items: center; text-align: center; }
  .cw-content { text-align: left; }
}

@media (max-width: 480px) {
  body { font-size: 12px; }
  .app-title-text { font-size: 11px; }
  .menubar { display: none; }
  .group-label { display: none; }
  .toolbar-group { flex-wrap: wrap; padding: 6px; }
}

/* Print Settings */
@media print {
  body { background: white; padding: 0; color: #000; }
  .app-titlebar, .menubar, .toolbar, .statusbar,
  .skip-link, .dialog, .slide-footer, .window-controls { display: none !important; }
  .app-window { box-shadow: none; border: none; max-width: 100%; margin: 0; }
  .workspace { padding: 0; }
  .slide-container {
    display: block !important;
    page-break-after: always;
    box-shadow: none;
    border: 1px solid #999;
    margin: 0 0 16px 0;
    width: 100%;
    min-height: auto;
    padding: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}