/**
 * Reader styles - chapter reading experience.
 * 2000s blog opera vibe: nostalgic, elegant, modern readability.
 *
 * @package Thegioivobien_Theme
 */

/* Reader layout - hide site header/footer on chapter pages */
body.single-chapter .site-header,
body.single-chapter .site-footer {
  display: none;
}

body.single-chapter {
  --reader-toolbar-height: 52px;
  background: var(--color-bg);
}

/* Prevent double-tap zoom on mobile so double-tap can toggle reader toolbar */
@media (hover: none) and (pointer: coarse) {
  body.single-chapter #reader-main {
    touch-action: manipulation;
  }
}

/* Reader toolbar - fixed on top, auto-hide on scroll down */
.reader-toolbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--color-card-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  box-shadow: var(--shadow-sm);
  transform: translateY(0);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.reader-toolbar.reader-toolbar--hidden {
  transform: translateY(-100%);
  box-shadow: none;
}

/* Offset content when toolbar visible; move up when toolbar hidden */
body.single-chapter .site-main {
  padding-top: var(--reader-toolbar-height);
  transition: padding-top 0.3s ease;
}

body.single-chapter .site-main:has(.reader-toolbar.reader-toolbar--hidden) {
  padding-top: 0;
}

/* Wider toolbar - Bootstrap xl (1140px) */
.reader-toolbar__inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.reader-toolbar__back {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 12rem;
  min-width: 0;
  flex-shrink: 1;
  font-family: var(--font-serif);
}

.reader-toolbar__back:hover {
  color: var(--color-accent);
}

.reader-toolbar__controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.reader-toolbar__group {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: 0;
  overflow: hidden;
}

.reader-toolbar__btn {
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: background var(--transition-base), color var(--transition-base);
}

.reader-toolbar__btn:hover {
  background: var(--color-bg-alt);
}

.reader-toolbar__btn.is-active {
  background: var(--color-accent);
  color: #fff;
}

.reader-toolbar__btn--font {
  font-weight: 600;
}

.reader-toolbar__chapters {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 200px;
}

.reader-toolbar__select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: 0;
  background: var(--color-card-bg);
  font-size: var(--font-size-sm);
  font-family: var(--font-serif);
}

.reader-toolbar__btn--dark {
  padding: var(--space-sm);
}

.reader-toolbar__icon-light {
  display: none;
}

.reader-dark .reader-toolbar__icon-dark {
  display: none;
}

.reader-dark .reader-toolbar__icon-light {
  display: inline;
}

/* Reader content */
.reader-content {
  padding: var(--space-2xl) 0;
}

/* Reader border - 9-piece layout using sliced assets */
/* Image proportions: top 126, bottom 187, left 176, right 218 - scaled ~0.5 */
.reader-border {
  --reader-border-top: 63px;
  --reader-border-bottom: 94px;
  --reader-border-left: 88px;
  --reader-border-right: 109px;
  max-width: calc(var(--reader-max) + var(--reader-border-left) + var(--reader-border-right));
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--reader-border-left) 1fr var(--reader-border-right);
  grid-template-rows: var(--reader-border-top) 1fr var(--reader-border-bottom);
  gap: 0;
}

.reader-border__piece {
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100% 100%;
}

.reader-border__piece--tl {
  background-image: url("../images/reader-border/reader-border_top-left.png");
}

.reader-border__piece--t {
  background-image: url("../images/reader-border/reader-border-top.png");
}

.reader-border__piece--tr {
  background-image: url("../images/reader-border/reader-border_top-right.png");
}

.reader-border__piece--l {
  background-image: url("../images/reader-border/reader-border_left.png");
}

.reader-border__piece--r {
  background-image: url("../images/reader-border/reader-border_right.png");
}

.reader-border__piece--bl {
  background-image: url("../images/reader-border/reader-border_bottom-left.png");
}

.reader-border__piece--b {
  background-image: url("../images/reader-border/reader-border_bottom.png");
}

.reader-border__piece--br {
  background-image: url("../images/reader-border/reader-border_bottom-right.png");
}

.reader-border__content.reader-container {
  max-width: var(--reader-max);
  width: 100%;
  margin: 0 auto;
  grid-column: 2;
  grid-row: 2;
  position: relative;

  background-color: var(--color-bg);
  background-image: url("../images/reader-border/reader-border_center.png");
  background-repeat: no-repeat;
  background-size: 100% 100%;

  /* Padding nội dung bên trong frame */
  padding: var(--space-2xl) var(--space-xl);
}

@media (min-width: 768px) {
  .reader-border {
    --reader-border-top: 72px;
    --reader-border-bottom: 106px;
    --reader-border-left: 100px;
    --reader-border-right: 124px;
  }

  .reader-border__content.reader-container {
    padding: var(--space-3xl) var(--space-2xl);
  }
}

/* Dark mode - ensure text colors use scoped variables (body inherits :root, so we must set explicitly) */
.reader-dark .reader-content {
  background-color: var(--color-bg);
}

.reader-dark .reader-container {
  background-color: var(--color-bg);
}

.reader-dark .reader-body,
.reader-dark .reader-body p,
.reader-dark .reader-body li,
.reader-dark .reader-body blockquote {
  color: var(--color-text);
}

.reader-dark .reader-body blockquote {
  background: var(--color-bg-alt);
  border-left-color: var(--color-accent);
}

.reader-dark .reader-title,
.reader-dark .reader-container .reader-body h1,
.reader-dark .reader-container .reader-body h4 {
  color: var(--color-text);
}

.reader-dark .reader-breadcrumb,
.reader-dark .reader-chapter-num,
.reader-dark .reader-nav__link,
.reader-dark .reader-container .reader-body figcaption,
.reader-dark .reader-container .reader-body .wp-block-image figcaption,
.reader-dark .reader-container .reader-body .wp-caption-text {
  color: var(--color-text-muted);
}

.reader-dark .reader-container .reader-body h5,
.reader-dark .reader-container .reader-body h6 {
  color: var(--color-text-muted);
}

/* Reader font sizes */
.reader-content.font-small .reader-body {
  font-size: 1rem;
  line-height: 1.7;
}

.reader-content.font-medium .reader-body {
  font-size: 1.125rem;
  line-height: 1.8;
}

.reader-content.font-large .reader-body {
  font-size: 1.25rem;
  line-height: 1.9;
}

/* Breadcrumb */
.reader-breadcrumb {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  letter-spacing: 0.03em;
}

.reader-breadcrumb a:hover {
  color: var(--color-accent);
}

.reader-breadcrumb__sep {
  margin: 0 var(--space-sm);
  opacity: 0.5;
}

/* Reader header */
.reader-header-content {
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.reader-title {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-serif);
  font-size: var(--font-size-2xl);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.reader-chapter-num {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

/* Reader body - drop cap first paragraph (optional), refined typography */
.reader-body {
  font-family: var(--font-serif);
  font-size: var(--reader-font-size);
  line-height: var(--reader-line-height);
}

.reader-body p {
  margin-bottom: 1.5em;
}

.reader-body p:last-child {
  margin-bottom: 0;
}

/* Drop cap on first paragraph - 2000s blog opera touch */
.reader-body > p:first-of-type::first-letter {
  float: left;
  font-size: 3.5em;
  line-height: 0.9;
  padding-right: var(--space-sm);
  padding-top: 0.08em;
  font-weight: 500;
  color: var(--color-accent);
}

/* Reader headings - vibrant color hierarchy */
.reader-container .reader-body h1,
.reader-container .reader-body h2,
.reader-container .reader-body h3,
.reader-container .reader-body h4,
.reader-container .reader-body h5,
.reader-container .reader-body h6 {
  font-family: var(--font-serif);
  margin-top: 2em;
  margin-bottom: 0.5em;
  line-height: 1.35;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.reader-container .reader-body h1 {
  color: var(--color-text);
  font-size: 1.75em;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 0.2em;
}

.reader-container .reader-body h2 {
  color: var(--color-accent);
  font-size: 1.5em;
}

.reader-container .reader-body h3 {
  color: var(--color-accent-hover);
  font-size: 1.3em;
}

.reader-container .reader-body h4 {
  color: var(--color-text);
  font-size: 1.15em;
  font-weight: 600;
}

.reader-container .reader-body h5 {
  color: var(--color-text-muted);
  font-size: 1.05em;
  font-weight: 600;
}

.reader-container .reader-body h6 {
  color: var(--color-text-muted);
  font-size: 1em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Reader links - lively, standout */
.reader-container .reader-body a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 0.2em;
  text-decoration-color: rgba(47, 111, 237, 0.35);
  transition: color var(--transition-base), text-decoration-color var(--transition-base);
}

.reader-container .reader-body a:hover {
  color: var(--color-accent-hover);
  text-decoration-color: var(--color-accent-hover);
}

.reader-body blockquote {
  margin: var(--space-xl) 0;
  padding: var(--space-base) var(--space-xl);
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-alt);
  font-style: italic;
}

/* Figure + figcaption - ensure caption is visible */
.reader-container .reader-body figure,
.reader-container .reader-body .wp-block-image,
.reader-container .reader-body .wp-caption {
  margin: var(--space-2xl) 0;
}

.reader-container .reader-body figure img,
.reader-container .reader-body .wp-block-image img,
.reader-container .reader-body .wp-caption img {
  display: block;
  max-width: 100%;
  height: auto;
}

.reader-container .reader-body figcaption,
.reader-container .reader-body .wp-block-image figcaption,
.reader-container .reader-body .wp-caption-text {
  display: block !important;
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.5;
  font-style: italic;
}

/* Reader nav */
.reader-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.reader-nav__link {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  min-height: var(--touch-min);
  display: inline-flex;
  align-items: center;
  padding: var(--space-md) 0;
}

.reader-nav__link:hover {
  color: var(--color-accent);
}

.reader-nav__prev {
  text-align: left;
}

.reader-nav__next {
  text-align: right;
}

.reader-nav__list {
  text-align: center;
}

.reader-nav__empty {
  min-width: 0;
}

/* Mobile: stack toolbar to prevent overlap */
@media (max-width: 640px) {
  .reader-toolbar__inner {
    flex-wrap: wrap;
    gap: var(--space-md);
    padding: 0 var(--space-md);
  }

  .reader-toolbar__back {
    max-width: 50%;
    flex: 1 1 auto;
  }

  .reader-toolbar__chapters {
    order: 3;
    flex-basis: 100%;
    max-width: none;
    margin-top: var(--space-xs);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border);
  }

  .reader-toolbar__controls {
    margin-left: auto;
  }
}

@media (max-width: 480px) {
  .reader-nav {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .reader-nav__list {
    grid-column: 1 / -1;
  }

  .reader-nav__next {
    text-align: left;
  }

  .reader-toolbar__back {
    max-width: 45%;
  }

  .reader-toolbar__group .reader-toolbar__btn {
    padding: var(--space-sm) var(--space-sm);
  }
}

/* Mobile - hide side borders to avoid scaling bug, maximize content width */
@media (max-width: 640px) {
  .reader-border {
    --reader-border-top: 40px;
    --reader-border-bottom: 58px;
    --reader-border-left: 0;
    --reader-border-right: 0;
  }

  .reader-border__content.reader-container {
    padding: var(--space-xl) var(--space-md);
  }
}

@media (max-width: 480px) {
  .reader-border {
    --reader-border-top: 32px;
    --reader-border-bottom: 46px;
    --reader-border-left: 0;
    --reader-border-right: 0;
  }

  .reader-border__content.reader-container {
    padding: var(--space-lg) var(--space-sm);
  }
}

@media (max-width: 320px) {
  .reader-border {
    --reader-border-top: 24px;
    --reader-border-bottom: 36px;
    --reader-border-left: 0;
    --reader-border-right: 0;
  }

  .reader-border__content.reader-container {
    padding: var(--space-md) var(--space-sm);
  }

  .reader-toolbar__inner {
    padding: 0 var(--space-md);
  }

  .reader-toolbar__back {
    max-width: 40%;
  }
}