/* ========================================
   READER STYLES
   Chapter Reading Experience
   ======================================== */

/* Reader Page Base */
.reader-page {
    padding-top: calc(var(--reader-nav-height) + env(safe-area-inset-top, 0px));
}

/* Reader Header */
.reader-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: calc(var(--reader-nav-height) + env(safe-area-inset-top, 0px));
    padding-top: env(safe-area-inset-top, 0px);
    background: var(--color-bg-translucent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: var(--border-subtle);
    z-index: 1000;
    transition: transform var(--transition-base);
}

/* Invisible hit target to reveal chrome when header is auto-hidden */
.reader-reveal-zone {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: calc(28px + env(safe-area-inset-top, 0px));
    z-index: 1001;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
}

.reader-reveal-zone.is-active {
    display: block;
}

.reader-header.hidden {
    transform: translateY(-100%);
}

.reader-header-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Back Button */
.reader-back {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.reader-back svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-fast);
}

.reader-back:hover {
    color: var(--color-text);
}

.reader-back:hover svg {
    transform: translateX(-3px);
}

.back-text {
    display: none;
}

@media (min-width: 640px) {
    .back-text {
        display: inline;
    }
}

/* Reader Title */
.reader-title {
    text-align: center;
}

.reader-title .chapter-label {
    display: block;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    margin-bottom: 2px;
}

.reader-title h1 {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

@media (min-width: 640px) {
    .reader-title h1 {
        max-width: 400px;
    }
}

/* Reader Controls */
.reader-controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-xs);
}

.reader-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.reader-btn:hover {
    color: var(--color-text);
    background: var(--color-surface);
}

.reader-btn svg {
    width: 20px;
    height: 20px;
}

.reader-btn .icon-moon {
    display: none;
}

[data-theme="light"] .reader-btn .icon-sun {
    display: none;
}

[data-theme="light"] .reader-btn .icon-moon {
    display: block;
}

/* Reading Progress Bar */
.reading-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-surface);
}

.progress-bar {
    height: 100%;
    background: var(--color-accent);
    width: 0%;
    transition: width 0.1s linear;
}

/* Font Size Panel */
.font-panel {
    position: fixed;
    top: calc(var(--reader-nav-height) + env(safe-area-inset-top, 0px) + var(--space-sm));
    right: max(var(--space-md), env(safe-area-inset-right, 0px));
    background: var(--color-bg-card);
    border: var(--border-subtle);
    border-radius: var(--border-radius-lg);
    padding: var(--space-md);
    z-index: 1002;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.font-panel[hidden] {
    display: none;
}

.font-panel-inner {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.font-label {
    font-family: var(--font-serif);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.font-label.font-large {
    font-size: var(--text-lg);
}

#font-size-slider {
    width: 120px;
    height: 4px;
    background: var(--color-surface);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
}

#font-size-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

#font-size-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

#font-size-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* ========================================
   CHAPTER READER CONTENT
   ======================================== */

.chapter-reader {
    min-height: calc(100vh - var(--reader-nav-height));
    padding: var(--space-xl) 0;
}

.chapter-article {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Chapter Header */
.chapter-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: var(--border-subtle);
}

.chapter-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
}

.chapter-divider {
    opacity: 0.5;
}

.chapter-headline {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

.chapter-subtitle {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    font-size: var(--text-sm);
}

.reading-time {
    color: var(--color-text-secondary);
}

.content-warning-small {
    color: var(--color-accent);
    font-style: italic;
}

/* Chapter Body — default 18px aligns with font slider default */
.chapter-body {
    font-family: var(--font-serif);
    font-size: 18px;
    line-height: 1.9;
    color: var(--color-text);
}

.chapter-body p {
    margin-bottom: var(--space-lg);
    text-align: justify;
    hyphens: auto;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
}

/* Drop Cap for first paragraph */
.chapter-drop-cap::first-letter {
    float: left;
    font-size: 4.5em;
    line-height: 0.8;
    padding-right: var(--space-sm);
    padding-top: 0.1em;
    font-weight: 700;
    color: var(--color-accent);
}

/* Section Breaks */
.section-break {
    border: none;
    margin: var(--space-2xl) auto;
    width: 60px;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-accent), transparent);
    position: relative;
}

.section-break::before {
    content: '◆';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: var(--color-bg);
    padding: 0 var(--space-sm);
    color: var(--color-accent);
    font-size: var(--text-sm);
}

/* Chapter Footer */
.chapter-footer {
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: var(--border-subtle);
}

.chapter-end {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.end-marker {
    display: block;
    font-size: var(--text-xl);
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.end-text {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
}

/* Chapter Navigation */
.chapter-nav {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-md);
    align-items: center;
}

.chapter-nav-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
    color: var(--color-text);
    background: var(--color-bg-card);
    border: var(--border-subtle);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.chapter-nav-btn:hover:not(:disabled) {
    background: var(--color-surface);
    border-color: var(--color-accent);
}

.chapter-nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.chapter-nav-btn svg {
    width: 18px;
    height: 18px;
}

.chapter-nav-prev {
    justify-self: start;
}

.chapter-nav-next {
    justify-self: end;
}

.chapter-nav-center {
    text-align: center;
}

.chapter-counter {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Reader Footer */
.reader-footer {
    padding: var(--space-lg) 0;
    background: var(--color-bg-elevated);
    border-top: var(--border-subtle);
    text-align: center;
}

.reader-footer p {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* ========================================
   RESPONSIVE READER
   ======================================== */

@media (min-width: 0) and (max-width: 768px) {
  /* Mobile First Base */
    .chapter-headline {
        font-size: var(--text-2xl);
    }
    
    .chapter-body {
        font-size: 18px;
        line-height: 1.8;
    }

    .chapter-body p {
        text-align: left;
        hyphens: manual;
        -webkit-hyphens: manual;
    }

    .chapter-article {
        padding-left: max(1.25rem, env(safe-area-inset-left, 0px));
        padding-right: max(1.25rem, env(safe-area-inset-right, 0px));
    }
    
    .chapter-drop-cap::first-letter {
        font-size: 3.5em;
    }
    
    .chapter-nav {
        grid-template-columns: 1fr auto 1fr;
        gap: var(--space-sm);
    }
    
    .chapter-nav-center {
        display: block;
    }

    .chapter-counter {
        font-size: 0.65rem;
        letter-spacing: 0.08em;
    }
    
    .chapter-nav-btn span {
        display: none;
    }
    
    .chapter-nav-btn {
        justify-content: center;
        min-width: 44px;
        min-height: 44px;
    }

    .reader-footer {
        padding-bottom: max(var(--space-lg), env(safe-area-inset-bottom, 0px));
    }
}

@media (min-width: 0) and (max-width: 480px) {
  /* Small Mobile */
    .chapter-header {
        margin-bottom: var(--space-xl);
    }
    
    .chapter-meta {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .chapter-divider {
        display: none;
    }
    
    .section-break {
        margin: var(--space-xl) auto;
    }
}

/* ========================================
   DARK MODE SPECIFIC READER ADJUSTMENTS
   ======================================== */

/* Improve contrast in dark mode */
@media (prefers-color-scheme: dark) {
    .chapter-body {
        font-weight: 400;
    }
}

/* Selection colors */
::selection {
    background: var(--color-accent-subtle);
    color: var(--color-text);
}

::-moz-selection {
    background: var(--color-accent-subtle);
    color: var(--color-text);
}

/* Smooth scrolling for anchor links */
html {
    scroll-padding-top: calc(var(--reader-nav-height) + var(--space-md));
}

/* Print styles for reader */
@media print {
    .reader-header,
    .reader-footer,
    .font-panel {
        display: none !important;
    }
    
    .chapter-reader {
        padding-top: 0;
    }
    
    .chapter-body {
        font-size: 12pt;
        line-height: 1.6;
    }
    
    .chapter-body p {
        text-align: left;
        orphans: 3;
        widows: 3;
    }
    
    .page-break {
        page-break-before: always;
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */

/* Fade in content */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chapter-article {
    animation: fadeIn 0.6s ease-out;
}

/* Smooth theme transition */
body,
body * {
    transition-property: background-color, color, border-color;
    transition-duration: var(--transition-slow);
}

/* Loading state for content */
.chapter-body.loading {
    opacity: 0.5;
    pointer-events: none;
}

.chapter-body.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 2px solid var(--color-surface);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}