/* EternaLibre Notes — Apple Elegance meets Classic Desktop GUI */

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro", "Inter", "Segoe UI", Roboto, sans-serif;
  background-color: var(--app-bg);
  color: var(--app-fg);
  transition: background-color 0.15s ease, color 0.15s ease;
}

body {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  overflow: hidden;
}

a {
  color: var(--ansi-4);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* Menu Bar */
.menu-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 32px;
  padding: 0 12px;
  background-color: var(--app-bg);
  border-bottom: 1px solid var(--ui-border);
  user-select: none;
  flex-shrink: 0;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.menu-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 4px;
}

.menu-item {
  position: relative;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
}

/* Menus are opened by click (see `openMenu` in app.js), not CSS hover, so
   that only one can be open at a time. `.open` both highlights the trigger
   and reveals its dropdown. */
.menu-item:hover,
.menu-item:focus,
.menu-item.open {
  background-color: var(--ui-hover);
  outline: none;
}

.menu-item.open .menu-dropdown {
  display: block;
}

.menu-dropdown {
  display: none;
  position: absolute;
  top: calc(100% - 4px);
  left: 0;
  min-width: 180px;
  /* The Theme menu has 24 entries; cap the height so it cannot run off
     the bottom of the viewport (body has overflow: hidden). */
  max-height: calc(100dvh - 48px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  background-color: var(--app-bg);
  border: 1px solid var(--ui-border);
  border-radius: 6px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  list-style: none;
  margin: 0;
  padding: 12px 6px 6px;
  z-index: 100;
}

.menu-dropdown li {
  padding: 0;
}

.menu-dropdown button,
.menu-dropdown a {
  display: block;
  width: 100%;
  padding: 6px 10px;
  background: none;
  border: none;
  text-align: left;
  color: var(--app-fg);
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
}

.menu-dropdown button:hover,
.menu-dropdown a:hover {
  background-color: var(--ui-hover);
  text-decoration: none;
}

/* Marks a View menu item whose pane is currently collapsed, so the state is
   readable at a glance instead of only via the Hide/Show label. */
.menu-dropdown button.active-view::before {
  content: "\2713\00a0";
  opacity: 0.7;
}

.menu-dropdown hr {
  border: none;
  border-top: 1px solid var(--ui-border);
  margin: 6px 0;
}

.app-title {
  font-size: 12px;
  font-weight: 600;
  opacity: 0.7;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
  padding: 0 12px;
  background-color: var(--app-bg);
  border-bottom: 1px solid var(--ui-border);
  gap: 12px;
  flex-shrink: 0;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  padding: 5px 12px;
  background-color: var(--ui-hover);
  border: 1px solid var(--ui-border);
  border-radius: 6px;
  color: var(--app-fg);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  background-color: var(--ansi-12);
  border-color: var(--app-fg);
}

.btn-primary {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  border-color: var(--btn-primary-bg);
}

.btn-primary:hover {
  background-color: var(--btn-primary-bg);
  box-shadow: inset 0 0 0 999px rgba(255, 255, 255, 0.12);
}

.btn-danger {
  background-color: var(--btn-danger-bg);
  color: var(--btn-danger-fg);
  border-color: var(--btn-danger-bg);
}

.btn-danger:hover {
  background-color: var(--btn-danger-bg);
  box-shadow: inset 0 0 0 999px rgba(255, 255, 255, 0.12);
}

.search-form input,
.theme-form select {
  padding: 5px 10px;
  background-color: var(--app-bg);
  border: 1px solid var(--ui-border);
  border-radius: 6px;
  font-size: 13px;
  outline: none;
}

.search-form input:focus,
.theme-form select:focus {
  border-color: var(--ansi-4);
  box-shadow: 0 0 0 2px var(--ui-hover);
}

.theme-form {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}

/* Flash Messages */
.flash-message {
  padding: 8px 12px;
  background-color: var(--ansi-2);
  color: var(--app-bg);
  font-size: 13px;
  font-weight: 500;
  flex-shrink: 0;
}

/* App Body */
.app-body {
  display: grid;
  grid-template-columns: 280px 1fr 1fr;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* When a pane is collapsed via the View menu, the remaining pane reclaims the
   space. Each state sets its own column count so a lone pane always spans the
   full remaining width instead of sitting in a half-width track.

   Scoped to desktop only: on mobile the tab bar already decides which single
   pane is shown, and these rules would outrank `.app-body > .mobile-active`
   on specificity, leaving the Preview tab permanently empty. */
@media (min-width: 901px) {
  .app-body.hide-preview,
  .app-body.hide-editor {
    grid-template-columns: 280px 1fr;
  }

  .app-body.hide-editor.hide-preview {
    grid-template-columns: 280px;
  }
}

@media (min-width: 601px) and (max-width: 900px) {
  .app-body.hide-preview,
  .app-body.hide-editor {
    grid-template-columns: 240px 1fr;
  }

  .app-body.hide-editor.hide-preview {
    grid-template-columns: 240px;
  }
}

@media (min-width: 601px) {
  .app-body.hide-editor .editor-pane {
    display: none;
  }

  .app-body.hide-preview .preview-pane {
    display: none;
  }
}

/* Sidebar */
.sidebar {
  background-color: var(--app-bg);
  border-right: 1px solid var(--ui-border);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.sidebar-header {
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.6;
  border-bottom: 1px solid var(--ui-border);
}

.note-list {
  list-style: none;
  margin: 0;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.note-item {
  border-radius: 8px;
  transition: background-color 0.15s ease;
}

.note-item:hover {
  background-color: var(--ui-hover);
}

.note-item.active {
  background-color: var(--ui-hover);
}

.note-item a {
  display: block;
  padding: 10px 12px;
  color: inherit;
}

.note-item a:hover {
  text-decoration: none;
}

.note-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.note-meta {
  font-size: 11px;
  opacity: 0.6;
  margin-bottom: 4px;
}

.note-preview {
  font-size: 12px;
  opacity: 0.7;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.note-item.empty {
  padding: 20px;
  text-align: center;
  opacity: 0.5;
  font-size: 13px;
}

/* Editor Pane */
.editor-pane {
  display: flex;
  flex-direction: column;
  background-color: var(--app-bg);
  border-right: 1px solid var(--ui-border);
  overflow: hidden;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.note-form {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.note-title-input {
  padding: 14px 16px;
  font-size: 20px;
  font-weight: 700;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--ui-border);
  outline: none;
  color: var(--app-fg);
}

.note-title-input:focus {
  border-bottom-color: var(--ansi-4);
}

.note-content-input {
  flex: 1;
  width: 100%;
  padding: 16px;
  font-family: "SF Mono", "Monaco", "Inconsolata", "Fira Code", monospace;
  font-size: 14px;
  line-height: 1.6;
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  color: var(--app-fg);
  tab-size: 2;
}

.form-actions {
  padding: 10px 16px;
  border-top: 1px solid var(--ui-border);
  display: flex;
  justify-content: flex-end;
}

.empty-state {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.5;
  font-size: 14px;
}

/* Preview Pane */
.preview-pane {
  display: flex;
  flex-direction: column;
  background-color: var(--app-bg);
  overflow-y: auto;
  transition: background-color 0.15s ease;
}

.markdown-body {
  flex: 1;
  padding: 20px 24px;
  font-size: 15px;
  line-height: 1.7;
  max-width: 100%;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  margin-top: 24px;
  margin-bottom: 12px;
  font-weight: 700;
  line-height: 1.3;
}

.markdown-body h1 { font-size: 28px; border-bottom: 1px solid var(--ui-border); padding-bottom: 8px; }
.markdown-body h2 { font-size: 22px; border-bottom: 1px solid var(--ui-border); padding-bottom: 6px; }
.markdown-body h3 { font-size: 18px; }
.markdown-body h4 { font-size: 16px; }

.markdown-body p {
  margin: 0 0 14px;
}

.markdown-body ul,
.markdown-body ol {
  margin: 0 0 14px;
  padding-left: 24px;
}

.markdown-body li {
  margin-bottom: 4px;
}

.markdown-body blockquote {
  margin: 0 0 14px;
  padding: 8px 16px;
  border-left: 4px solid var(--ansi-4);
  background-color: var(--ui-hover);
  border-radius: 0 6px 6px 0;
}

.markdown-body code {
  font-family: "SF Mono", "Monaco", "Inconsolata", "Fira Code", monospace;
  font-size: 13px;
  padding: 2px 6px;
  background-color: var(--ui-hover);
  border-radius: 4px;
}

.markdown-body pre {
  padding: 14px;
  background-color: var(--ansi-0);
  border-radius: 8px;
  overflow-x: auto;
  margin: 0 0 14px;
}

.markdown-body pre code {
  background: transparent;
  padding: 0;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 14px;
}

.markdown-body th,
.markdown-body td {
  padding: 8px 12px;
  border: 1px solid var(--ui-border);
  text-align: left;
}

.markdown-body th {
  background-color: var(--ui-hover);
  font-weight: 600;
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--ui-border);
  margin: 20px 0;
}

.markdown-body input[type="checkbox"] {
  margin-right: 8px;
}

/* Status Bar */
.status-bar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
  height: 24px;
  padding: 0 12px;
  background-color: var(--app-bg);
  border-top: 1px solid var(--ui-border);
  font-size: 11px;
  opacity: 0.8;
  flex-shrink: 0;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

/* Auth Pages (/setup, /login) */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 24px 16px;
  overflow-y: auto;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  padding: 32px 28px;
  background-color: var(--app-bg);
  border: 1px solid var(--ui-border);
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.auth-card h1 {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 700;
}

.auth-subtitle {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.5;
  opacity: 0.75;
}

.auth-error {
  margin-bottom: 16px;
  padding: 10px 12px;
  border: 1px solid var(--ansi-1);
  border-radius: 6px;
  background-color: color-mix(in srgb, var(--ansi-1) 12%, transparent);
  color: var(--ansi-9);
  font-size: 13px;
  line-height: 1.4;
}

.auth-qr {
  display: flex;
  justify-content: center;
  margin-bottom: 18px;
  padding: 12px;
  background-color: #ffffff;
  border-radius: 8px;
}

.auth-qr svg {
  display: block;
  width: 100%;
  max-width: 240px;
  height: auto;
}

.auth-manual {
  margin-bottom: 16px;
  text-align: center;
}

.auth-manual p {
  margin: 0 0 6px;
  font-size: 12px;
  opacity: 0.7;
}

.auth-secret {
  display: block;
  padding: 8px 10px;
  background-color: var(--ui-hover);
  border: 1px solid var(--ui-border);
  border-radius: 6px;
  font-family: "SF Mono", "Monaco", "Inconsolata", "Fira Code", monospace;
  font-size: 13px;
  word-break: break-all;
  user-select: all;
}

.auth-note {
  margin: 0 0 18px;
  font-size: 12px;
  line-height: 1.5;
  opacity: 0.65;
}

.auth-note code {
  padding: 1px 5px;
  background-color: var(--ui-hover);
  border-radius: 4px;
  font-size: 11px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.auth-form label {
  font-size: 13px;
  font-weight: 500;
}

.auth-input {
  width: 100%;
  min-height: 52px;
  padding: 12px 14px;
  background-color: var(--app-bg);
  border: 1px solid var(--ui-border);
  border-radius: 8px;
  color: var(--app-fg);
  font-family: "SF Mono", "Monaco", "Inconsolata", "Fira Code", monospace;
  font-size: 24px;
  letter-spacing: 0.35em;
  text-align: center;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.auth-input:focus {
  border-color: var(--ansi-4);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--ansi-4) 25%, transparent);
}

.auth-form .btn {
  min-height: 44px;
  margin-top: 4px;
}

.auth-footer {
  margin: 22px 0 0;
  text-align: center;
  font-size: 11px;
  opacity: 0.5;
}

/* About Page */
.about-page {
  display: flex;
  flex-direction: column;
  height: 100dvh;
}

.about-page main {
  flex: 1;
  padding: 40px;
  max-width: 720px;
  overflow-y: auto;
}

/* The about page was the one screen in the app with no typography rules at
   all, so it rendered at UA defaults: a 2em heading with 0.67em margins and
   a 1.9 line-height feature list. That is what made it read as a desktop
   page on a phone. */
.about-page main > h1 {
  font-size: 26px;
  line-height: 1.2;
  margin: 0 0 4px;
  /* Balances a wrapped title instead of leaving a ragged last line. */
  text-wrap: balance;
}

.about-page main > p {
  line-height: 1.6;
}

.about-page main > h2 {
  font-size: 15px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.6;
  margin: 28px 0 10px;
}

/* Outbound links. Kept as a list rather than prose so each destination reads
   as its own target, and so the mobile 44px touch-target rule can apply to
   the whole row. */
.about-links {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.about-links li {
  margin: 0;
}

.about-links a {
  display: block;
  padding: 8px 12px;
  margin: 0 -12px;
  border-radius: 6px;
  font-size: 15px;
  transition: background-color 0.15s ease;
}

.about-links a:hover {
  background-color: var(--ui-hover);
  text-decoration: none;
}

/* Sits last and stays muted; it is a colophon, not a call to action. */
.about-page .about-colophon {
  font-size: 13px;
  opacity: 0.7;
  margin: 28px 0 20px;
}

.about-page .tagline {
  font-size: 18px;
  font-weight: 600;
  color: var(--ansi-4);
  margin-top: 0;
}

.about-features {
  margin: 0 0 20px;
  padding-left: 22px;
  line-height: 1.9;
}

/* "Back to notes" is the only way off this screen, so it gets a real target
   rather than bare link text. */
.about-page .back-link {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--ui-border);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.about-page .back-link:hover {
  background-color: var(--ui-hover);
  text-decoration: none;
}

/* Mobile Tab Bar — hidden on desktop */
.tab-bar {
  display: none;
}

/* Responsive */
@media (max-width: 900px) {
  .app-body {
    grid-template-columns: 240px 1fr 1fr;
  }
}

/* Mobile: <= 600px (covers iPhone 11 at 390px CSS width) */
@media (max-width: 600px) {
  html, body {
    height: 100%;
    overscroll-behavior: none;
  }

  body {
    height: 100dvh;
  }

  /* Desktop-only affordances, hidden once the tab bar takes over.
     Paired with the `min-width: 601px` rules for the pane toggles above —
     keep the two breakpoints in sync. */
  .desktop-only {
    display: none;
  }

  /* Menu bar wraps to a second row.
     NOTE: do not use `overflow: auto` here — it would create a new stacking
     context and trap the absolutely-positioned `.menu-dropdown` underneath
     the toolbar and content panes. */
  .menu-bar {
    height: auto;
    min-height: 40px;
    padding: 0 8px;
    flex-shrink: 0;
  }

  .menu-list {
    flex-wrap: wrap;
    overflow: visible;
  }

  .menu-item {
    padding: 8px 10px;
    min-height: 40px;
    display: flex;
    align-items: center;
    white-space: nowrap;
    font-size: 14px;
  }

  /* Constrain the dropdown to the viewport width and a conservative height
     on phones. Safe to use `overflow` here: it only clips the dropdown's own
     contents, it does not trap the dropdown inside an ancestor's context. */
  .menu-dropdown {
    max-width: calc(100vw - 16px);
    max-height: 55dvh;
  }

  .app-title {
    display: none;
  }

  /* Toolbar wraps instead of stretching off-screen */
  .toolbar {
    flex-wrap: wrap;
    height: auto;
    padding: 8px;
    gap: 8px;
    flex-shrink: 0;
  }

  .toolbar-group {
    flex: 1 1 auto;
    min-width: 0;
  }

  .search-form {
    flex: 1 1 100%;
    min-width: 0;
    display: flex;
  }

  .search-form input {
    flex: 1;
    width: 100%;
    min-width: 0;
  }

  .theme-form {
    flex: 1 1 auto;
    min-width: 0;
  }

  .theme-form select {
    flex: 1;
    min-width: 0;
  }

  /* Apple HIG minimum 44px touch targets */
  .btn {
    min-height: 44px;
    padding: 10px 14px;
    font-size: 15px;
    flex-shrink: 0;
  }

  .search-form input,
  .theme-form select {
    min-height: 44px;
    padding: 10px 12px;
    font-size: 16px; /* prevents iOS zoom-on-focus */
  }

  /* Tab bar replaces the 3-column layout on mobile */
  .tab-bar {
    display: flex;
    flex-shrink: 0;
    background-color: var(--app-bg);
    border-bottom: 1px solid var(--ui-border);
    padding: 4px 8px;
    gap: 4px;
    transition: background-color 0.15s ease, border-color 0.15s ease;
  }

  .tab-button {
    flex: 1;
    min-height: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 6px 4px;
    background: none;
    border: none;
    border-radius: 8px;
    color: var(--app-fg);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
  }

  .tab-button.active {
    background-color: var(--ui-hover);
  }

  .tab-icon {
    font-size: 18px;
    line-height: 1;
  }

  /* Single-pane view: only the active tab's pane is displayed */
  .app-body {
    display: block;
    flex: 1;
    min-height: 0;
    overflow: hidden;
  }

  .app-body > * {
    display: none;
    height: 100%;
    border-right: none;
    border-bottom: none;
    -webkit-overflow-scrolling: touch;
  }

  .app-body > .mobile-active {
    display: flex;
    flex-direction: column;
  }

  /* Sidebar fills the pane on mobile */
  .sidebar-header {
    padding: 12px 16px;
  }

  .note-list {
    padding: 8px;
  }

  .note-item a {
    padding: 14px 12px;
  }

  /* Editor fills the pane on mobile */
  .note-title-input {
    font-size: 18px;
    padding: 14px 16px;
    flex-shrink: 0;
  }

  .note-content-input {
    font-size: 16px; /* prevents iOS zoom-on-focus */
    padding: 16px;
  }

  .form-actions {
    padding: 12px 16px;
    flex-shrink: 0;
  }

  .form-actions .btn {
    width: 100%;
  }

  /* Preview fills the pane on mobile */
  .markdown-body {
    padding: 20px 16px;
    font-size: 16px;
  }

  /* Status bar stays compact */
  .status-bar {
    height: 28px;
    flex-shrink: 0;
    gap: 10px;
    font-size: 11px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .status-bar::-webkit-scrollbar {
    display: none;
  }

  /* Prevent horizontal page scroll */
  .flash-message {
    flex-shrink: 0;
  }

  /* About page. Without these it keeps the desktop reading measure: a 26px
     heading, an 18px tagline, and a 1.9 line-height list, all sized for a
     wide column rather than a phone. */
  .about-page main {
    padding: 20px 16px;
  }

  .about-page main > h1 {
    font-size: 22px;
  }

  .about-page .tagline {
    font-size: 16px;
  }

  .about-features {
    padding-left: 20px;
    line-height: 1.6;
  }

  /* Apple HIG minimum touch target, matching `.btn` above. The negative
     margin is cancelled out so the hover background still bleeds to the
     padding edge without pushing the row off the column. */
  .about-links a {
    min-height: 44px;
    padding: 12px;
    margin: 0 -4px;
    font-size: 16px; /* prevents iOS zoom-on-focus */
  }

  .about-page main > h2 {
    margin: 24px 0 8px;
  }

  .about-page .about-colophon {
    font-size: 13px;
    margin: 24px 0 20px;
  }

  /* Apple HIG minimum touch target, matching `.btn` above. */
  .about-page .back-link {
    display: block;
    min-height: 44px;
    padding: 12px 16px;
    text-align: center;
    font-size: 16px;
  }
}