:root {
  /* Font Variables */
  --font-body: Palatino, 'Palatino Linotype', 'Palatino LT STD', 'Book Antiqua', Georgia, serif;
  --font-heading: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-sans: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  line-height: 1.5;
  font-size: 18px;
  /* Restored to original base size */

  /* Light Mode Defaults */
  --bg-color: #ffffff;
  --text-color: rgba(0, 0, 0, 0.87);
  --sidebar-bg: #ccc;
  --link-color: #0000ee;
  --border-color: #999;
  --accent-color: #007bff;

  color-scheme: light dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-color);
  height: 100vh;
  width: 100%;
  max-width: 100vw;
  overflow: hidden;
  /* Restore explicit hidden for app-shell feel */
}

html {
  overflow-x: hidden;
  max-width: 100vw;
}

#app {
  height: 100%;
  width: 100%;
}

.layout {
  display: flex;
  height: 100%;
  width: 100%;
  overflow-x: hidden;
  position: relative;
}

/* Sidebar - matching v2 glass variant */
.sidebar {
  width: 11rem;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  z-index: 100;
  padding: 1.5rem;
  padding-top: 5rem;
}

.theme-dark .sidebar {
  background: rgba(0, 0, 0, 0.2);
  border-right-color: rgba(255, 255, 255, 0.05);
}

/* Sidebar Header Removed */

.sidebar-search {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.sidebar-search input {
  width: 100%;
  border-radius: 20px;
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

.sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  margin: 0 -1.5rem;
  padding: 0 1.5rem;
}

.sidebar-section h3 {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  /* Slightly smaller */
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.sidebar-section h3:hover {
  opacity: 0.8;
}

.sidebar-section .caret {
  font-size: 0.6rem;
  transition: transform 0.2s ease;
  transform: rotate(90deg);
  /* Expanded by default in CSS, but we'll set collapsed in HTML */
}

.sidebar-section.collapsed .caret {
  transform: rotate(0deg);
}

.sidebar-section.collapsed ul {
  display: none;
}

.sidebar-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-section li a {
  display: block;
  padding: 0.3rem 0.8rem;
  margin: 0.1rem 0;
  border-radius: 8px;
  transition: all 0.2s ease;
  font-weight: 500;
  font-size: 0.85rem;
  /* Explicitly smaller sidebar links */
  /* Explicit smaller size */
  text-decoration: none;
  color: var(--text-color);
  opacity: 0.8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: var(--font-sans);
}

.sidebar-section li a:hover {
  background: rgba(255, 255, 255, 0.1);
  opacity: 1;
  transform: translateX(4px);
}

.sidebar-section li.active a {
  background: rgba(255, 255, 255, 0.25);
  opacity: 1;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sidebar-footer a {
  opacity: 0.6;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-color);
  font-size: 0.9rem;
  font-family: var(--font-sans);
}

.sidebar-footer a:hover {
  background: rgba(255, 255, 255, 0.05);
  opacity: 1;
}

/* Main Content area - always fills full width (sidebar overlays) */
.main-content {
  width: 100%;
  height: 100%;
  min-width: 0;
  overflow-y: auto;
  background-color: var(--bg-color);
  padding: 1.5rem 2rem;
  transition: padding 0.3s ease;
}

@media (max-width: 1024px) {
  .main-content {
    padding: 1rem;
    padding-top: 4rem;
    /* Space for the toggle button */
  }
}

.main-content>* {
  max-width: 35em;
  margin-left: auto;
  margin-right: auto;
}

/* Sidebar Toggle (Neko Emoji) */
.sidebar-toggle {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1001;
  background: none;
  border: none;
  width: 3rem;
  height: 3rem;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.sidebar-toggle:hover {
  transform: scale(1.1);
}

.sidebar-toggle:active {
  transform: scale(0.95);
}

/* Mobile Sidebar & Backdrop */
.sidebar-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 999;
}

@media (max-width: 1024px) {
  .sidebar-visible .sidebar-backdrop {
    display: block;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: none;
  }

  .sidebar-visible .sidebar {
    transform: translateX(0);
    box-shadow: 10px 0 20px rgba(0, 0, 0, 0.1);
  }
}

/* CONTENT CENTERING PARAMETER:
 * The sidebar overlays content (position: fixed) and never shifts the main content area.
 * Content is always centered in the full viewport width.
 * To revert to sidebar-shifts-content: remove the @media (min-width: 1025px) fixed rules below
 * and restore "flex: 1; min-width: 0" on .main-content only.
 */
@media (min-width: 1025px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .sidebar-visible .sidebar {
    transform: translateX(0);
    box-shadow: 10px 0 20px rgba(0, 0, 0, 0.1);
  }

  .sidebar-hidden .sidebar {
    transform: translateX(-100%);
  }
}

/* Layout State */
.sidebar-hidden .sidebar {
  display: flex;
}

.sidebar-visible .sidebar {
  display: flex;
}

input[type="text"],
input[type="url"],
input[type="search"],
select {
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
  font-family: inherit;
  font-size: 0.9rem;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.2);
}

.logo {
  font-size: 2.5rem;
  margin: 0 0 1.5rem 0;
  cursor: pointer;
  text-align: center;
  user-select: none;
}

.sidebar .logo {
  margin-bottom: 1.5rem;
}

/* Feed Items Styles (from v2) */
.item-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feed-item {
  padding: 1rem 0.5rem;
  margin-top: 2rem;
  border-bottom: none;
  border-radius: 8px;
  transition: background-color 0.2s ease;
}

.feed-item.selected {
  background-color: rgba(0, 123, 255, 0.05);
  box-shadow: inset 4px 0 0 var(--accent-color);
}

.theme-dark .feed-item.selected {
  background-color: rgba(33, 136, 255, 0.1);
}

.item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.item-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: bold;
  text-decoration: none;
  color: var(--link-color);
  display: block;
  flex: 1;
  cursor: pointer;
}

.item-title:hover {
  text-decoration: underline;
}

.star-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0 0 0 0.5rem;
  vertical-align: middle;
  transition: color 0.2s;
  line-height: 1;
}

.star-btn.is-starred {
  color: blue;
}

.star-btn.is-unstarred {
  color: var(--text-color);
  opacity: 0.3;
}

.dateline {
  margin-top: 0;
  font-weight: normal;
  font-size: 0.75em;
  color: #ccc;
  margin-bottom: 1rem;
}

.dateline a {
  color: #ccc;
  text-decoration: none;
}

.item-description {
  color: var(--text-color);
  line-height: 1.5;
  font-size: 1rem;
  margin-top: 1rem;
  overflow-wrap: break-word;
  word-break: break-word;
}

.item-description a {
  text-decoration: none;
  color: var(--link-color);
}

.item-description img,
.item-description video,
.item-description pre {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1rem 0;
}

.item-description pre {
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-x: auto;
  background: rgba(0, 0, 0, 0.05);
  padding: 1em;
  border-radius: 4px;
}

.scrape-btn {
  background: var(--bg-color);
  border: 1px solid var(--border-color, #ccc);
  color: blue;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 0.8rem;
  padding: 2px 6px;
  margin-left: 0.5rem;
}

/* Themes */
.theme-dark {
  --bg-color: #000000;
  --text-color: #ffffff;
  --sidebar-bg: #000000;
  --link-color: #5ac8fa;
  --border-color: #333333;
  --accent-color: #2188ff;
  --sidebar-text-color: rgba(0, 0, 0, 0.87);
}

/* Dark mode: sidebar uses grey background with dark text */
.theme-dark .sidebar {
  background: rgba(180, 180, 180, 0.85);
  border-right-color: rgba(0, 0, 0, 0.15);
}

.theme-dark .sidebar-section li a,
.theme-dark .sidebar-section h3,
.theme-dark .sidebar-footer a {
  color: rgba(0, 0, 0, 0.87);
}

.theme-dark .sidebar-section li.active a {
  background: rgba(0, 0, 0, 0.15);
}

.theme-dark .sidebar-section li a:hover {
  background: rgba(0, 0, 0, 0.08);
}

/* Dark mode: sidebar-toggle button should have no background */
.theme-dark .sidebar-toggle {
  background: none;
}

/* Dark mode: sidebar search input should use light background */
.theme-dark .sidebar-search input {
  background: rgba(255, 255, 255, 0.7);
  color: rgba(0, 0, 0, 0.87);
  border-color: rgba(0, 0, 0, 0.2);
}

.font-serif {
  --font-body: Georgia, 'Times New Roman', Times, serif;
  font-family: var(--font-body);
}

.font-sans {
  --font-body: var(--font-heading);
  font-family: var(--font-body);
}

.font-mono {
  --font-body: Menlo, Monaco, Consolas, 'Courier New', monospace;
  font-family: var(--font-body);
}

/* Settings View */
.settings-view {
  padding-top: 2rem;
}

.settings-section {
  margin-bottom: 2.5rem;
}

.settings-section h3 {
  font-family: var(--font-heading);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

.theme-options {
  display: flex;
  gap: 1rem;
}

button {
  border-radius: 8px;
  border: 1px solid var(--border-color);
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: bold;
  font-family: inherit;
  background-color: #f9f9f9;
  cursor: pointer;
  transition: all 0.2s;
}

.theme-dark button {
  background-color: #1a1a1a;
  color: #fff;
  border-color: #333;
}

button.active {
  border-color: var(--accent-color);
  background-color: #eef;
}

.theme-dark button.active {
  background-color: #282e34;
  border-color: var(--accent-color);
}

.theme-dark input,
.theme-dark select {
  background-color: #111;
  color: #ffffff;
  border-color: #333;
}

.add-feed-form {
  display: flex;
  gap: 0.5rem;
}

.add-feed-form input {
  flex: 1;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
}

.settings-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  opacity: 0.7;
}

#font-selector {
  width: 100%;
  padding: 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
}

.data-actions button,
.data-actions .button {
  display: inline-block;
  text-align: center;
  width: 100%;
}

label.button {
  cursor: pointer;
}