/* Comic Reader — Dark Cinematic Theme */

:root {
  --color-bg: #1a1714;
  --color-bg-deep: #0d0b09;
  --color-surface: #252220;
  --color-amber: #E8AD4A;
  --color-bordeaux: #7D4450;
  --color-text: #e8e0d4;
  --color-text-muted: #9a9088;
  --color-white: #f5f0e8;
  --page-gap: 16px;
  --header-height: 56px;
  --progress-height: 3px;
  --thumb-strip-height: 64px;
  --max-page-width: 800px;
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Source Sans 3', -apple-system, system-ui, sans-serif;
  --font-brand: 'Pacifico', cursive;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-deep);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Skip to content */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 1000;
  padding: 8px 16px;
  background: var(--color-amber);
  color: var(--color-bg-deep);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

/* ===== PROGRESS BAR ===== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: var(--progress-height);
  background: var(--color-amber);
  z-index: 100;
  transition: width 0.15s ease-out;
}

/* ===== HEADER ===== */
.reader-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 16px;
  background: linear-gradient(180deg, var(--color-bg-deep) 0%, rgba(13, 11, 9, 0.95) 80%, transparent 100%);
  backdrop-filter: blur(8px);
}

.reader-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reader-title .chapter {
  color: var(--color-text-muted);
  font-weight: 400;
  font-size: 0.875rem;
  margin-left: 8px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ===== LANGUAGE SWITCHER ===== */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--color-surface);
  border: 1px solid rgba(232, 173, 74, 0.3);
  border-radius: 6px;
  color: var(--color-amber);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  min-height: 44px;
  min-width: 44px;
  justify-content: center;
  transition: background-color 0.15s, border-color 0.15s;
}

.lang-switch:hover,
.lang-switch:focus-visible {
  background: rgba(232, 173, 74, 0.15);
  border-color: var(--color-amber);
  outline: none;
}

.lang-switch:focus-visible {
  box-shadow: 0 0 0 2px var(--color-amber);
}

/* ===== PAGE COUNTER ===== */
.page-counter {
  position: fixed;
  top: calc(var(--header-height) + 8px);
  right: 16px;
  z-index: 40;
  padding: 4px 10px;
  background: rgba(13, 11, 9, 0.85);
  border-radius: 4px;
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-muted);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}

.page-counter.visible {
  opacity: 1;
}

/* ===== READER CONTENT ===== */
.reader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--page-gap);
  padding: 0 0 calc(var(--thumb-strip-height) + 32px);
  max-width: var(--max-page-width);
  margin: 0 auto;
}

/* ===== COMIC PAGE ===== */
.comic-page {
  width: 100%;
  position: relative;
}

.comic-page img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--color-bg);
}

/* Vignette between pages — cinematic breathing */
.comic-page::after {
  content: '';
  display: block;
  height: var(--page-gap);
  background: radial-gradient(ellipse at center, transparent 0%, var(--color-bg-deep) 70%);
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .comic-page::after {
    background: none;
  }
}

/* Special pages */
.comic-page--cover img {
  border-radius: 0;
}

.comic-page--title img,
.comic-page--credits img,
.comic-page--back img {
  max-width: 600px;
  margin: 0 auto;
}

/* ===== THUMBNAIL STRIP ===== */
.thumb-strip {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  gap: 2px;
  padding: 8px;
  height: var(--thumb-strip-height);
  background: linear-gradient(0deg, var(--color-bg-deep) 0%, rgba(13, 11, 9, 0.95) 80%, transparent 100%);
  backdrop-filter: blur(8px);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.thumb-strip::-webkit-scrollbar {
  display: none;
}

.thumb-strip a {
  flex-shrink: 0;
  display: block;
  height: 48px;
  opacity: 0.4;
  transition: opacity 0.15s, transform 0.15s;
  border-radius: 2px;
  overflow: hidden;
}

.thumb-strip a:hover,
.thumb-strip a:focus-visible {
  opacity: 0.8;
  transform: scale(1.1);
  outline: none;
}

.thumb-strip a.active {
  opacity: 1;
  box-shadow: 0 0 0 2px var(--color-amber);
}

.thumb-strip a:focus-visible {
  box-shadow: 0 0 0 2px var(--color-amber);
}

.thumb-strip img {
  height: 100%;
  width: auto;
  display: block;
}

/* ===== FOOTER ===== */
.reader-footer {
  max-width: var(--max-page-width);
  margin: 32px auto 0;
  padding: 32px 16px calc(var(--thumb-strip-height) + 32px);
  text-align: center;
  border-top: 1px solid var(--color-surface);
}

.footer-brand {
  font-family: var(--font-brand);
  font-size: 1.5rem;
  color: var(--color-bordeaux);
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-bottom: 24px;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 4px 0;
  transition: color 0.15s;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--color-amber);
}

/* Download buttons */
.download-section {
  margin: 24px 0;
}

.download-section h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.download-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--color-surface);
  border: 1px solid rgba(232, 173, 74, 0.2);
  border-radius: 8px;
  color: var(--color-amber);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  min-height: 44px;
  transition: background-color 0.15s, border-color 0.15s;
}

.btn-download:hover,
.btn-download:focus-visible {
  background: rgba(232, 173, 74, 0.1);
  border-color: var(--color-amber);
}

.btn-download:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-amber);
}

/* Share button */
.btn-share {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: transparent;
  border: 1px solid var(--color-surface);
  border-radius: 6px;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  justify-content: center;
  transition: color 0.15s, border-color 0.15s;
}

.btn-share:hover,
.btn-share:focus-visible {
  color: var(--color-amber);
  border-color: var(--color-amber);
}

.btn-share:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-amber);
}

/* Share toast */
.toast {
  position: fixed;
  bottom: calc(var(--thumb-strip-height) + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 8px 16px;
  background: var(--color-surface);
  color: var(--color-amber);
  border-radius: 6px;
  font-size: 0.875rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 200;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Copyright */
.footer-copyright {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 16px;
}

/* Ko-fi */
.kofi-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding: 8px 16px;
  background: var(--color-bordeaux);
  border-radius: 8px;
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s;
}

.kofi-link:hover {
  opacity: 0.85;
}

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

/* Tablet+ */
@media (min-width: 768px) {
  .reader-content {
    padding-top: 16px;
  }

  .comic-page--title img,
  .comic-page--credits img,
  .comic-page--back img {
    max-width: 500px;
  }
}

/* Full-bleed on mobile */
@media (max-width: 767px) {
  .reader-content {
    gap: 8px;
  }

  .comic-page::after {
    height: 8px;
  }

  .reader-header {
    padding: 0 12px;
  }

  .reader-title .chapter {
    display: none;
  }
}

/* Very small screens */
@media (max-width: 374px) {
  .reader-title {
    font-size: 1rem;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 2px;
}

/* Offline indicator */
.offline-badge {
  display: none;
  position: fixed;
  top: calc(var(--header-height) + 8px);
  left: 16px;
  z-index: 40;
  padding: 4px 10px;
  background: rgba(125, 68, 80, 0.9);
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--color-white);
}

.offline-badge.show {
  display: block;
}