/**
 * @fileoverview Writenex Astro - Plain CSS Styles
 *
 * Self-contained styles for the Writenex Astro editor interface.
 * Uses CSS custom properties for consistent theming.
 * Supports both dark and light modes.
 */

/* ============================================================================
   IMPORTS
   ============================================================================ */

@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,200..800;1,200..800&display=swap");
@import url("./variables.css");

/* ============================================================================
   BASE RESET & DEFAULTS
   ============================================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body,
#root {
  height: 100%;
  width: 100%;
  overflow-x: hidden; /* Prevent horizontal scroll */
}

body {
  font-family:
    "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: var(--wn-font-base);
  line-height: 1.5;
  background-color: var(--wn-zinc-950);
  color: var(--wn-zinc-100);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================================================
   CUSTOM SCROLLBAR
   Subtle scrollbar styling for dark and light modes
   ============================================================================ */

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--wn-overlay-15) transparent;
}

/* WebKit scrollbar (Chrome, Edge, Safari) */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--wn-overlay-15);
  border-radius: var(--wn-radius-full);
  border: 2px solid transparent;
  background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--wn-overlay-25);
  border: 2px solid transparent;
  background-clip: content-box;
}

::-webkit-scrollbar-corner {
  background: transparent;
}

/* ============================================================================
   APP COMPONENT STYLES
   Root layout and shared button components
   ============================================================================ */

/* App root container */
.wn-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 100vw;
  overflow-x: hidden; /* Prevent horizontal scroll */
  background-color: var(--wn-zinc-950);
  color: var(--wn-zinc-100);
}

/* Main layout container */
.wn-main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Main content area */
.wn-main-content {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  background-color: var(--wn-zinc-850);
}

/* Editor wrapper */
.wn-editor-wrapper {
  flex: 1;
  overflow: auto;
}

/* ============================================================================
   CONTENT BAR - Secondary header for content actions
   ============================================================================ */

.wn-content-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--wn-space-3) var(--wn-space-5);
  border-bottom: 1px solid var(--wn-overlay-10);
  background-color: var(--wn-zinc-900);
  min-height: 48px;
  gap: var(--wn-space-5);
}

.wn-content-bar-left {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.wn-content-bar-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: var(--wn-font-base);
  font-weight: 500;
  color: var(--wn-zinc-200);
}

.wn-content-bar-right {
  display: flex;
  align-items: center;
  gap: var(--wn-space-3);
  flex-shrink: 0;
}

/* Content bar separator for button grouping */
.wn-content-bar-separator {
  width: 1px;
  height: 24px;
  background-color: var(--wn-overlay-10);
}

/* ============================================================================
   BUTTON COMPONENTS
   ============================================================================ */

/* Base button styles */
.wn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--wn-space-3);
  border-radius: var(--wn-radius-md);
  padding: var(--wn-space-2) var(--wn-space-4);
  font-size: var(--wn-font-base);
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition:
    background-color 0.15s,
    color 0.15s,
    border-color 0.15s;
}

.wn-btn:focus-visible {
  outline: 2px solid var(--wn-brand-500);
  outline-offset: 2px;
}

.wn-btn:disabled {
  pointer-events: none;
  opacity: 0.5;
}

/* Primary button - brand background */
.wn-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--wn-space-3);
  border-radius: var(--wn-radius-md);
  padding: var(--wn-space-2) var(--wn-space-4);
  font-size: var(--wn-font-base);
  font-weight: 500;
  line-height: 1.25rem;
  box-sizing: border-box;
  border: none;
  cursor: pointer;
  background-color: var(--wn-brand-500);
  color: white;
  transition:
    background-color 0.15s,
    color 0.15s;
}

.wn-btn-primary:hover {
  background-color: var(--wn-brand-600);
}

.wn-btn-primary:focus-visible {
  outline: 2px solid var(--wn-brand-500);
  outline-offset: 2px;
}

.wn-btn-primary:disabled {
  pointer-events: none;
  opacity: 0.5;
}

/* Secondary button - transparent with border */
.wn-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--wn-space-3);
  border-radius: var(--wn-radius-md);
  padding: var(--wn-space-2) var(--wn-space-4);
  font-size: var(--wn-font-base);
  font-weight: 500;
  line-height: 1.25rem;
  box-sizing: border-box;
  cursor: pointer;
  background-color: transparent;
  border: 1px solid var(--wn-zinc-700);
  color: var(--wn-zinc-300);
  transition:
    background-color 0.15s,
    color 0.15s,
    border-color 0.15s;
}

.wn-btn-secondary:hover {
  background-color: var(--wn-zinc-800);
  color: var(--wn-zinc-100);
}

.wn-btn-secondary:focus-visible {
  outline: 2px solid var(--wn-brand-500);
  outline-offset: 2px;
}

.wn-btn-secondary:disabled {
  pointer-events: none;
  opacity: 0.5;
}

/* Ghost button - no border */
.wn-btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--wn-space-3);
  border-radius: var(--wn-radius-md);
  padding: var(--wn-space-2) var(--wn-space-4);
  font-size: var(--wn-font-base);
  font-weight: 500;
  border: none;
  cursor: pointer;
  background-color: transparent;
  color: var(--wn-zinc-400);
  transition:
    background-color 0.15s,
    color 0.15s;
}

.wn-btn-ghost:hover {
  background-color: var(--wn-zinc-800);
  color: var(--wn-zinc-100);
}

.wn-btn-ghost:focus-visible {
  outline: 2px solid var(--wn-brand-500);
  outline-offset: 2px;
}

/* Icon button - square, no text */
.wn-btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--wn-icon-btn-lg);
  height: var(--wn-icon-btn-lg);
  padding: 0;
  border-radius: var(--wn-radius-md);
  background-color: transparent;
  color: var(--wn-zinc-400);
  border: none;
  cursor: pointer;
  transition:
    background-color 0.15s,
    color 0.15s;
}

.wn-btn-icon:hover {
  background-color: var(--wn-zinc-800);
  color: var(--wn-zinc-100);
}

.wn-btn-icon:focus-visible {
  outline: 2px solid var(--wn-brand-500);
  outline-offset: 2px;
}

/* ============================================================================
   AUTOSAVE INDICATOR
   ============================================================================ */

.wn-autosave-indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--wn-space-2);
  padding: var(--wn-space-2) var(--wn-space-4);
  border-radius: var(--wn-radius-md);
  font-size: var(--wn-font-base);
  font-weight: 500;
  line-height: 1.25rem;
  box-sizing: border-box;
  cursor: pointer;
  background-color: transparent;
  border: 1px solid var(--wn-zinc-700);
  color: var(--wn-zinc-300);
  transition:
    background-color 0.15s,
    color 0.15s,
    border-color 0.15s;
}

.wn-autosave-indicator:hover {
  background-color: var(--wn-zinc-800);
}

.wn-autosave-text {
  font-size: var(--wn-font-base);
}

.wn-autosave-text--saving {
  color: var(--wn-brand-400);
}

.wn-autosave-text--saved {
  color: var(--wn-success-400);
}

.wn-autosave-text--error {
  color: var(--wn-error-400);
}

.wn-autosave-text--pending {
  color: var(--wn-warning-400);
}

.wn-autosave-text--idle {
  color: var(--wn-zinc-400);
}

/* ============================================================================
   DRAFT/PUBLISHED TOGGLE BUTTON VARIANTS
   ============================================================================ */

.wn-btn-draft {
  border-color: var(--wn-warning-alpha-30);
  color: var(--wn-warning-500);
}

.wn-btn-draft:hover {
  border-color: var(--wn-warning-500);
  background-color: var(--wn-warning-alpha-10);
}

.wn-btn-published {
  border-color: var(--wn-success-alpha-30);
  color: var(--wn-success-500);
}

.wn-btn-published:hover {
  border-color: var(--wn-success-500);
  background-color: var(--wn-success-alpha-10);
}

/* Preview button - remove link underline */
.wn-btn-preview {
  text-decoration: none;
}

.wn-btn-preview:hover {
  text-decoration: none;
}

/* ============================================================================
   LIGHT MODE OVERRIDES
   ============================================================================ */

.wn-light body,
.wn-light .wn-app {
  background-color: var(--wn-zinc-50);
  color: var(--wn-zinc-900);
}

.wn-light .wn-main-content {
  background-color: var(--wn-zinc-150);
}

.wn-light .wn-content-bar {
  border-bottom-color: var(--wn-overlay-light-8);
  background-color: var(--wn-zinc-100);
}

.wn-light .wn-content-bar-title {
  color: var(--wn-zinc-700);
}

.wn-light .wn-content-bar-separator {
  background-color: var(--wn-overlay-light-10);
}

/* Button overrides for light mode */
.wn-light .wn-btn-secondary {
  border-color: var(--wn-zinc-300);
  color: var(--wn-zinc-700);
}

.wn-light .wn-btn-secondary:hover {
  background-color: var(--wn-zinc-100);
  color: var(--wn-zinc-900);
}

.wn-light .wn-btn-ghost {
  color: var(--wn-zinc-600);
}

.wn-light .wn-btn-ghost:hover {
  background-color: var(--wn-zinc-100);
  color: var(--wn-zinc-900);
}

.wn-light .wn-btn-icon {
  color: var(--wn-zinc-600);
}

.wn-light .wn-btn-icon:hover {
  background-color: var(--wn-zinc-100);
  color: var(--wn-zinc-900);
}

/* Autosave indicator light mode */
.wn-light .wn-autosave-indicator {
  border-color: var(--wn-zinc-300);
  color: var(--wn-zinc-700);
}

.wn-light .wn-autosave-indicator:hover {
  background-color: var(--wn-zinc-100);
}

/* Draft/Published button light mode */
.wn-light .wn-btn-draft {
  border-color: var(--wn-warning-alpha-40);
}

.wn-light .wn-btn-published {
  border-color: var(--wn-success-alpha-40);
}

/* Scrollbar light mode */
.wn-light * {
  scrollbar-color: var(--wn-overlay-light-20) transparent;
}

.wn-light ::-webkit-scrollbar-thumb {
  background: var(--wn-overlay-light-20);
}

.wn-light ::-webkit-scrollbar-thumb:hover {
  background: var(--wn-overlay-light-30);
}

/* ============================================================================
   ACCESSIBILITY UTILITIES
   ============================================================================ */

/**
 * Screen reader only utility class
 * Visually hides content while keeping it accessible to screen readers.
 * Uses standard techniques: position absolute, clip, and overflow hidden.
 */
.wn-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/**
 * Screen reader only - focusable variant
 * Becomes visible when focused (useful for skip links)
 */
.wn-sr-only-focusable:focus,
.wn-sr-only-focusable:active {
  position: static;
  width: auto;
  height: auto;
  padding: inherit;
  margin: inherit;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* ============================================================================
   GLOBAL FOCUS STATES
   Consistent focus ring styling for accessibility
   ============================================================================ */

/* Default focus-visible style for all interactive elements */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--wn-brand-500);
  outline-offset: 2px;
}

/* Remove default focus outline when not using keyboard */
button:focus:not(:focus-visible),
a:focus:not(:focus-visible),
[tabindex]:focus:not(:focus-visible) {
  outline: none;
}

/* ============================================================================
   REDUCED MOTION PREFERENCES
   Respects user's system preference for reduced motion
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}