/* ==========================================================================
   Chapter Reader – Phase 4 MVP
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Progress Bar
   -------------------------------------------------------------------------- */

.reader-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 99999;
    background: transparent;
}

/* Shift below WP admin bar when logged in */
.admin-bar .reader-progress {
    top: 32px;
}

@media screen and (max-width: 782px) {
    .admin-bar .reader-progress {
        top: 46px;
    }
}

.reader-progress__bar {
    height: 100%;
    width: 0;
    background: var(--kuehn-accent, #8b6f5a);
    transition: width 0.1s linear;
}

/* --------------------------------------------------------------------------
   2. Reader Container
   -------------------------------------------------------------------------- */

.chapter-reader {
    position: relative;
}

.chapter-reader-page {
    padding-inline: clamp(16px, 2.6vw, 32px);
}

.chapter-reader-page > .wp-block-group__inner-container {
    width: min(100%, 75ch);
    margin-inline: auto;
}

.chapter-reader-page .wp-block-group__inner-container,
.chapter-reader-page .wp-block-post-title,
.chapter-reader-page .wp-block-post-content,
.chapter-reader-page .chapter-reader {
    width: min(100%, 75ch);
    margin-inline: auto;
}

.chapter-reader-page > .wp-block-post-title,
.chapter-reader-page > .wp-block-post-content {
    width: min(100%, 75ch);
    margin-inline: auto;
}

.chapter-reader-page > .wp-block-post-title {
    /* Hide: reader-header already shows book title + chapter meta */
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    width: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    white-space: nowrap;
}

.chapter-reader-page .wp-block-post-content {
    margin-top: 0;
}

/* --------------------------------------------------------------------------
   3. Reader Header
   -------------------------------------------------------------------------- */

.reader-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    margin-bottom: 32px;
    border-bottom: 1px solid var(--kuehn-site-border, #e9e9ec);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.reader-header__left {
    justify-self: start;
    min-width: 0;
}

.reader-header__back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    text-decoration: none;
    color: var(--kuehn-site-text, #1c2024);
    opacity: 0.6;
    transition: opacity 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.reader-header__back:hover {
    opacity: 1;
}

.reader-header__center {
    grid-column: 2;
    text-align: center;
    min-width: 0;
}

.reader-header__chapter-title {
    display: block;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reader-header__meta {
    display: block;
    font-size: 12px;
    opacity: 0.5;
    margin-top: 2px;
}

.reader-header__separator {
    margin: 0 4px;
}

.reader-header__right {
    justify-self: end;
}

.reader-settings-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid var(--kuehn-site-border, #e9e9ec);
    border-radius: 8px;
    background: transparent;
    color: var(--kuehn-site-text, #1c2024);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.reader-settings-toggle:hover {
    background: var(--kuehn-site-border, #e9e9ec);
}

/* --------------------------------------------------------------------------
   4. Reader Body (Content)
   -------------------------------------------------------------------------- */

.chapter-reader__body {
    margin-bottom: 48px;
}

/* -- Font Size -- */
.chapter-reader[data-font-size="small"]  .chapter-reader__body { font-size: 16px; }
.chapter-reader[data-font-size="medium"] .chapter-reader__body { font-size: 18px; }
.chapter-reader[data-font-size="large"]  .chapter-reader__body { font-size: 20px; }
.chapter-reader[data-font-size="xlarge"] .chapter-reader__body { font-size: 24px; }

/* -- Font Family -- */
.chapter-reader[data-font-family="serif"] .chapter-reader__body { font-family: Georgia, "Times New Roman", serif; }
.chapter-reader[data-font-family="sans"]  .chapter-reader__body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
.chapter-reader[data-font-family="mono"]  .chapter-reader__body { font-family: "Courier New", Courier, monospace; }

/* -- Line Height -- */
.chapter-reader[data-line-height="compact"] .chapter-reader__body { line-height: 1.4; }
.chapter-reader[data-line-height="normal"]  .chapter-reader__body { line-height: 1.7; }
.chapter-reader[data-line-height="relaxed"], .chapter-reader[data-line-height="wide"] .chapter-reader__body { line-height: 2.0; }

/* -- Content Width -- */
.chapter-reader[data-content-width="narrow"] .chapter-reader__body { max-width: 55ch; margin-inline: auto; }
.chapter-reader[data-content-width="medium"] .chapter-reader__body { max-width: 70ch; margin-inline: auto; }
.chapter-reader[data-content-width="wide"]   .chapter-reader__body { max-width: 85ch; margin-inline: auto; }

/* -- Themes -- */
.chapter-reader[data-theme="light"] {
    --reader-bg: #ffffff;
    --reader-text: #1a1a1a;
    --reader-border: #eee;
    --reader-muted: rgba(0, 0, 0, 0.5);
    --reader-tooltip-bg: #111;
    --reader-tooltip-text: #fff;
    --reader-tooltip-border: rgba(255, 255, 255, 0.18);
}

.chapter-reader[data-theme="sepia"] {
    --reader-bg: #f4ecd8;
    --reader-text: #5c4a2f;
    --reader-border: #d4c9ad;
    --reader-muted: rgba(92, 74, 47, 0.5);
    --reader-tooltip-bg: #f8efdd;
    --reader-tooltip-text: #59462f;
    --reader-tooltip-border: #d2bfa2;
}

.chapter-reader[data-theme="dark"] {
    --reader-bg: #1a1a1a;
    --reader-text: #d4d4d4;
    --reader-border: #333;
    --reader-muted: rgba(212, 212, 212, 0.5);
    --reader-tooltip-bg: #282828;
    --reader-tooltip-text: #ededed;
    --reader-tooltip-border: #444;
}

/* Apply theme colors */
.chapter-reader[data-theme="light"] {
    background: var(--reader-bg);
    color: var(--reader-text);
}

.chapter-reader[data-theme="light"] p,
.chapter-reader[data-theme="light"] li,
.chapter-reader[data-theme="light"] blockquote {
    color: var(--reader-text);
}

.chapter-reader[data-theme="sepia"],
.chapter-reader[data-theme="dark"] {
    background: var(--reader-bg);
    color: var(--reader-text);
    padding: 0 24px;
    margin: 0 -24px;
    border: 1px solid var(--reader-border);
    border-radius: 8px;
}

/* Override site dark-mode color inheritance for reader themes */
.chapter-reader[data-theme="sepia"] p,
.chapter-reader[data-theme="sepia"] li,
.chapter-reader[data-theme="sepia"] blockquote,
.chapter-reader[data-theme="dark"] p,
.chapter-reader[data-theme="dark"] li,
.chapter-reader[data-theme="dark"] blockquote {
    color: var(--reader-text);
}

.chapter-reader[data-theme="dark"] .chapter-reader__body > .wp-block-group,
.chapter-reader[data-theme="dark"] .chapter-reader__body > .wp-block-cover,
.chapter-reader[data-theme="dark"] .chapter-reader__body > .has-background {
    background: transparent !important;
}

.chapter-reader[data-theme="dark"] .chapter-reader__body,
.chapter-reader[data-theme="dark"] .chapter-reader__body > .wp-block-post-content,
.chapter-reader[data-theme="dark"] .chapter-reader__body > .entry-content,
.chapter-reader[data-theme="dark"] .chapter-reader__body > .is-layout-constrained {
    background: transparent !important;
}

[data-site-theme-resolved="dark"] .chapter-reader-page,
[data-site-theme-resolved="dark"] .chapter-reader-page > .wp-block-group__inner-container,
[data-site-theme-resolved="dark"] .chapter-reader-page .wp-block-post-content,
[data-site-theme-resolved="dark"] .chapter-reader-page .chapter-reader__body {
    background: transparent !important;
}

/* When site is dark, reader dark theme inherits site colors seamlessly */
[data-site-theme-resolved="dark"] .chapter-reader[data-theme="dark"] {
    --reader-bg: transparent;
    --reader-text: var(--kuehn-site-text, #e7eaf0);
    --reader-border: var(--kuehn-site-border, #2b3340);
    --reader-muted: var(--kuehn-site-muted, #a1a8b5);
}

[data-site-theme-resolved="dark"] .chapter-reader[data-theme="dark"] {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    margin: 0;
}

.chapter-reader[data-theme="sepia"] .reader-header,
.chapter-reader[data-theme="dark"] .reader-header {
    border-bottom-color: var(--reader-border);
}

.chapter-reader[data-theme="sepia"] .reader-header {
    background: var(--reader-bg);
    color: var(--reader-text);
}

.chapter-reader[data-theme="sepia"] .reader-header__back,
.chapter-reader[data-theme="dark"] .reader-header__back {
    color: var(--reader-text);
}

.chapter-reader[data-theme="sepia"] .reader-settings-toggle,
.chapter-reader[data-theme="dark"] .reader-settings-toggle {
    color: var(--reader-text);
    border-color: var(--reader-border);
}

.chapter-reader[data-theme="sepia"] .chapter-nav__link,
.chapter-reader[data-theme="dark"] .chapter-nav__link {
    border-color: var(--reader-border);
    color: var(--reader-text);
}

.chapter-reader[data-theme="sepia"] a,
.chapter-reader[data-theme="dark"] a {
    color: var(--reader-text);
}

/* --------------------------------------------------------------------------
   5.4 Chat Shortcodes
   -------------------------------------------------------------------------- */

.kuehn-chat {
    margin: 2rem auto;
    max-width: min(100%, 36rem);
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

.kuehn-chat__device {
    overflow: hidden;
    border-radius: 30px;
    border: 1px solid rgba(12, 31, 26, 0.12);
    background: #d7dbd8;
    box-shadow: 0 22px 50px rgba(15, 23, 42, 0.12);
}

.kuehn-chat__header {
    display: grid;
    grid-template-columns: auto auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 11px;
    padding: 14px 16px;
    background: linear-gradient(180deg, #0f8f75 0%, #0b7d67 100%);
    color: #f7fffc;
}

.kuehn-chat__back,
.kuehn-chat__actions {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    opacity: 0.92;
}

.kuehn-chat__back svg,
.kuehn-chat__actions svg {
    width: 20px;
    height: 20px;
    display: block;
}

.kuehn-chat__avatar {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.24);
    color: #fff;
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.kuehn-chat__contact {
    min-width: 0;
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.kuehn-chat__contact strong {
    font-size: 1.1rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.kuehn-chat__contact span {
    font-size: 0.88rem;
    opacity: 0.82;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.kuehn-chat__viewport {
    padding: 8px 14px 20px;
    background-color: #efeae2;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.45) 0, rgba(255, 255, 255, 0) 18px),
        radial-gradient(circle at 80% 15%, rgba(255, 255, 255, 0.22) 0, rgba(255, 255, 255, 0) 22px),
        linear-gradient(135deg, rgba(0, 0, 0, 0.018) 25%, transparent 25%),
        linear-gradient(225deg, rgba(0, 0, 0, 0.018) 25%, transparent 25%);
    background-size: auto, auto, 22px 22px, 22px 22px;
    background-position: 0 0, 0 0, 0 0, 11px 11px;
}

.kuehn-chat__row {
    display: flex;
    margin: 0 0 10px;
}

.kuehn-chat__row--right {
    justify-content: flex-end;
}

.kuehn-chat__bubble {
    position: relative;
    display: inline-flex;
    flex-direction: column;
    gap: 5px;
    max-width: min(82%, 28rem);
    padding: 10px 12px 9px;
    border-radius: 16px;
    box-shadow: 0 1px 1px rgba(15, 23, 42, 0.08);
}

.kuehn-chat__row--left .kuehn-chat__bubble {
    background: rgba(255, 255, 255, 0.98);
    color: #142218;
    border-top-left-radius: 5px;
}

.kuehn-chat__row--right .kuehn-chat__bubble {
    background: #d9fdd3;
    color: #102217;
    border-top-right-radius: 5px;
}

.kuehn-chat__row--left .kuehn-chat__bubble::before,
.kuehn-chat__row--right .kuehn-chat__bubble::before {
    content: '';
    position: absolute;
    top: 8px;
    width: 10px;
    height: 15px;
}

.kuehn-chat__row--left .kuehn-chat__bubble::before {
    left: -8px;
    clip-path: polygon(100% 0, 100% 100%, 0 0);
    background: rgba(255, 255, 255, 0.98);
}

.kuehn-chat__row--right .kuehn-chat__bubble::before {
    right: -8px;
    clip-path: polygon(0 0, 100% 0, 0 100%);
    background: #d9fdd3;
}

.kuehn-chat__sender {
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #4f46e5;
}

.kuehn-chat__message,
.kuehn-chat__system {
    font-size: 1.12rem;
    line-height: 1.56;
    letter-spacing: -0.01em;
}

.kuehn-chat__message > :first-child,
.kuehn-chat__system > :first-child {
    margin-top: 0;
}

.kuehn-chat__message > :last-child,
.kuehn-chat__system > :last-child {
    margin-bottom: 0;
}

.kuehn-chat__message p {
    margin: 0;
}

.kuehn-chat__time {
    align-self: flex-end;
    font-size: 0.78rem;
    color: rgba(17, 27, 33, 0.56);
}

.kuehn-chat__day {
    display: flex;
    justify-content: center;
    margin: 2px 0 4px;
}

.kuehn-chat__day span,
.kuehn-chat__system {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 11px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.74);
    color: rgba(17, 27, 33, 0.76);
    box-shadow: 0 1px 1px rgba(15, 23, 42, 0.06);
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.kuehn-chat__system {
    margin: 12px auto;
    max-width: fit-content;
    background: rgba(255, 248, 205, 0.86);
    color: #6d5716;
}

.chapter-reader[data-theme="sepia"] .kuehn-chat__device {
    border-color: rgba(92, 74, 47, 0.14);
    background: #dfd6bf;
}

.chapter-reader[data-theme="sepia"] .kuehn-chat__viewport {
    background-color: #efe4cf;
}

.chapter-reader[data-theme="sepia"] .kuehn-chat__row--left .kuehn-chat__bubble {
    background: rgba(252, 248, 240, 0.98);
    color: #4f3e29;
}

.chapter-reader[data-theme="sepia"] .kuehn-chat__row--right .kuehn-chat__bubble {
    background: #dce9c6;
    color: #344228;
}

.chapter-reader[data-theme="sepia"] .kuehn-chat__row--left .kuehn-chat__bubble::before {
    background: rgba(252, 248, 240, 0.98);
}

.chapter-reader[data-theme="sepia"] .kuehn-chat__row--right .kuehn-chat__bubble::before {
    background: #dce9c6;
}

.chapter-reader[data-theme="sepia"] .kuehn-chat__day span {
    background: rgba(255, 251, 242, 0.86);
    color: rgba(89, 70, 47, 0.8);
}

.chapter-reader[data-theme="sepia"] .kuehn-chat__system {
    background: rgba(250, 233, 189, 0.9);
    color: #705c2c;
}

.chapter-reader[data-theme="dark"] .kuehn-chat__device {
    border-color: rgba(255, 255, 255, 0.06);
    background: #101b20;
    box-shadow: 0 22px 50px rgba(0, 0, 0, 0.32);
}

.chapter-reader[data-theme="dark"] .kuehn-chat__header {
    background: linear-gradient(180deg, #144d43 0%, #103e37 100%);
}

.chapter-reader[data-theme="dark"] .kuehn-chat__viewport {
    background-color: #0b141a;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.05) 0, rgba(255, 255, 255, 0) 18px),
        radial-gradient(circle at 80% 15%, rgba(255, 255, 255, 0.04) 0, rgba(255, 255, 255, 0) 22px),
        linear-gradient(135deg, rgba(255, 255, 255, 0.02) 25%, transparent 25%),
        linear-gradient(225deg, rgba(255, 255, 255, 0.02) 25%, transparent 25%);
}

.chapter-reader[data-theme="dark"] .kuehn-chat__row--left .kuehn-chat__bubble {
    background: #202c33;
    color: #e9edef;
}

.chapter-reader[data-theme="dark"] .kuehn-chat__row--right .kuehn-chat__bubble {
    background: #005c4b;
    color: #f4fffb;
}

.chapter-reader[data-theme="dark"] .kuehn-chat__row--left .kuehn-chat__bubble::before {
    background: #202c33;
}

.chapter-reader[data-theme="dark"] .kuehn-chat__row--right .kuehn-chat__bubble::before {
    background: #005c4b;
}

.chapter-reader[data-theme="dark"] .kuehn-chat__sender {
    color: #8ab4ff;
}

.chapter-reader[data-theme="dark"] .kuehn-chat__time {
    color: rgba(233, 237, 239, 0.64);
}

.chapter-reader[data-theme="dark"] .kuehn-chat__day span {
    background: rgba(17, 27, 33, 0.82);
    color: rgba(233, 237, 239, 0.76);
}

.chapter-reader[data-theme="dark"] .kuehn-chat__system {
    background: rgba(34, 53, 61, 0.9);
    color: #dce7ea;
}

@media (max-width: 640px) {
    .kuehn-chat {
        margin: 1.5rem -0.35rem;
        max-width: none;
    }

    .kuehn-chat__device {
        border-radius: 24px;
    }

    .kuehn-chat__header {
        padding: 12px 13px;
    }

    .kuehn-chat__viewport {
        padding: 8px 11px 17px;
    }

    .kuehn-chat__bubble {
        max-width: min(88%, 24rem);
    }
}

/* --------------------------------------------------------------------------
   5.5 Glossary Tooltips
   -------------------------------------------------------------------------- */

.glossar-tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dashed currentColor;
    cursor: help;
}

.glossar-tooltip__popup {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 10px);
    transform: translateX(-50%) translateY(6px);
    width: min(280px, 80vw);
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--reader-tooltip-border, rgba(255, 255, 255, 0.2));
    background: var(--reader-tooltip-bg, #111);
    color: var(--reader-tooltip-text, #fff);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 60;
}

.glossar-tooltip__popup strong {
    display: block;
    margin-bottom: 6px;
}

.glossar-tooltip__popup p {
    margin: 0 0 8px;
    font-size: 14px;
    line-height: 1.4;
}

.glossar-tooltip__popup a {
    color: inherit;
    text-decoration: underline;
}

.glossar-tooltip.is-open .glossar-tooltip__popup,
.glossar-tooltip:hover .glossar-tooltip__popup,
.glossar-tooltip:focus .glossar-tooltip__popup,
.glossar-tooltip:focus-within .glossar-tooltip__popup {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

/* --------------------------------------------------------------------------
   5. Chapter Navigation
   -------------------------------------------------------------------------- */

.chapter-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding-top: 32px;
    border-top: 1px solid var(--kuehn-site-border, #e9e9ec);
}

.chapter-nav__link {
    display: block;
    padding: 16px;
    border: 1px solid var(--kuehn-site-border, #e9e9ec);
    border-radius: 8px;
    text-decoration: none;
    color: var(--kuehn-site-text, #1c2024);
    transition: border-color 0.2s, background 0.2s;
}

.chapter-nav__link:hover {
    border-color: var(--kuehn-accent, #8b6f5a);
    background: color-mix(in srgb, var(--kuehn-accent, #8b6f5a) 5%, transparent);
}

.chapter-nav__label {
    display: block;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.5;
    margin-bottom: 4px;
}

.chapter-nav__title {
    display: block;
    font-size: 15px;
    font-weight: 500;
}

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

/* --------------------------------------------------------------------------
   6. Chapter Interactions (Likes + Comments)
   -------------------------------------------------------------------------- */

.chapter-interactions {
    display: flex;
    justify-content: center;
    margin: 0 0 28px;
}

.chapter-like-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    padding: 8px 14px;
    border: 1px solid var(--kuehn-site-border, #e9e9ec);
    border-radius: 999px;
    background: var(--kuehn-site-surface, #ffffff);
    color: var(--kuehn-site-text, #1c2024);
    cursor: pointer;
    transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.chapter-like-btn:hover {
    transform: translateY(-1px);
    border-color: #f05a44;
    background: #fff7f5;
}

.chapter-like-btn:focus-visible {
    outline: 2px solid rgba(240, 90, 68, 0.35);
    outline-offset: 2px;
}

.chapter-like-btn.is-liked {
    border-color: #f05a44;
    color: #c74635;
    background: #fff4f1;
}

.chapter-like-btn[data-busy="true"] {
    opacity: 0.65;
    pointer-events: none;
}

.chapter-like-btn[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
}

.chapter-like-btn__icon {
    display: block;
}

.chapter-like-btn__count {
    font-size: 14px;
    font-weight: 600;
    min-width: 1.8ch;
    text-align: center;
}

.chapter-like-btn.is-animating .chapter-like-btn__icon {
    animation: likeHeartPop 0.28s ease;
}

@keyframes likeHeartPop {
    0% { transform: scale(1); }
    40% { transform: scale(1.23); }
    100% { transform: scale(1); }
}

.spoiler-block {
    display: inline-block;
    border-radius: 4px;
    padding: 0 4px;
    cursor: pointer;
    background: rgba(35, 35, 35, 0.09);
}

.spoiler-block:focus-visible {
    outline: 2px solid var(--kuehn-focus-ring, #8b6f5a);
    outline-offset: 1px;
}

.spoiler-block__content {
    filter: blur(4px);
    user-select: none;
    transition: filter 0.2s ease;
}

.spoiler-block[data-revealed="true"] .spoiler-block__content {
    filter: blur(0);
    user-select: text;
}

.chapter-comments {
    margin-top: 36px;
    padding-top: 28px;
    border-top: 1px solid var(--wp--preset--color--neutral, #eee);
}

.chapter-comments .comment-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.chapter-comments .comment-body {
    margin-bottom: 14px;
    padding: 14px;
    border: 1px solid var(--wp--preset--color--neutral, #e8e8e8);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.7);
}

.chapter-comments .comment--supporter .comment-body {
    border-left: 4px solid #4f94d4;
}

.chapter-comments .comment--premium .comment-body {
    border-left: 4px solid #e59a2f;
    box-shadow: 0 0 0 1px rgba(229, 154, 47, 0.2);
}

.comment-badge {
    display: inline-block;
    margin-left: 6px;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    line-height: 1.4;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.comment-badge--supporter {
    border: 1px solid #4f94d4;
    color: #2e6ea7;
    background: rgba(79, 148, 212, 0.12);
}

.comment-badge--premium {
    border: 1px solid #e59a2f;
    color: #915b09;
    background: rgba(229, 154, 47, 0.15);
}

.chapter-comments #respond {
    margin-top: 24px;
    padding: 18px;
    border: 1px solid var(--kuehn-site-border, #e9e9ec);
    border-radius: 10px;
    background: var(--kuehn-site-surface, #fff);
}

.chapter-comments__hint {
    margin-top: 12px;
    margin-bottom: 0;
    font-size: 13px;
    line-height: 1.5;
    opacity: 0.8;
}

.chapter-comments__hint code {
    padding: 1px 6px;
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 0, 0.14);
    background: rgba(255, 255, 255, 0.5);
    font-size: 12px;
}

.chapter-comments .comment-form input,
.chapter-comments .comment-form textarea {
    width: 100%;
    border-radius: 6px;
    border: 1px solid #d4d4d4;
    padding: 10px 12px;
}

.chapter-comments .comment-form input:focus,
.chapter-comments .comment-form textarea:focus {
    outline: 2px solid color-mix(in srgb, var(--kuehn-accent, #8b6f5a) 25%, transparent);
    outline-offset: 0;
    border-color: var(--kuehn-accent, #8b6f5a);
}

.chapter-comments .comment-form textarea {
    min-height: 170px;
    resize: vertical;
}

.chapter-reader[data-theme="sepia"] .chapter-like-btn,
.chapter-reader[data-theme="dark"] .chapter-like-btn {
    border-color: var(--reader-border);
    background: transparent;
    color: var(--reader-text);
}

.chapter-reader[data-theme="dark"] .chapter-like-btn:hover {
    background: rgba(255, 255, 255, 0.06);
}

.chapter-reader[data-theme="dark"] .chapter-like-btn.is-liked {
    background: rgba(240, 90, 68, 0.12);
    color: #f07060;
}

.chapter-reader[data-theme="sepia"] .chapter-comments,
.chapter-reader[data-theme="dark"] .chapter-comments {
    border-top-color: var(--reader-border);
}

.chapter-reader[data-theme="sepia"] .chapter-comments .comment-body,
.chapter-reader[data-theme="dark"] .chapter-comments .comment-body,
.chapter-reader[data-theme="sepia"] .chapter-comments #respond,
.chapter-reader[data-theme="dark"] .chapter-comments #respond {
    border-color: var(--reader-border);
    background: rgba(255, 255, 255, 0.04);
}

[data-site-theme-resolved="dark"] .chapter-comments #respond {
    border-color: var(--kuehn-site-border, #2b3340);
    background: var(--kuehn-site-surface, #1a1f28);
}

[data-site-theme-resolved="dark"] .chapter-comments .comment-form input,
[data-site-theme-resolved="dark"] .chapter-comments .comment-form textarea {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--kuehn-site-border, #2b3340);
    color: var(--kuehn-site-text, #e7eaf0);
}

.chapter-reader[data-theme="dark"] .chapter-comments .comment-form input,
.chapter-reader[data-theme="dark"] .chapter-comments .comment-form textarea {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--reader-border);
    color: var(--reader-text);
}

.chapter-reader[data-theme="dark"] .chapter-comments__hint code {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--reader-border);
}

/* --------------------------------------------------------------------------
   7. Settings Panel
   -------------------------------------------------------------------------- */

.reader-settings {
    display: none;
}

.reader-settings[data-state="open"] {
    display: block;
}

.reader-settings__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 10000;
}

.reader-settings__panel {
    position: fixed;
    z-index: 10001;
    background: #fff;
    overflow-y: auto;
}

/* Desktop: centered modal */
@media (min-width: 769px) {
    .reader-settings__panel {
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 420px;
        max-height: 80vh;
        border-radius: 12px;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    }
}

/* Mobile: bottom sheet */
@media (max-width: 768px) {
    .reader-settings__panel {
        bottom: 0;
        left: 0;
        right: 0;
        max-height: 80vh;
        border-radius: 16px 16px 0 0;
        box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.15);
    }
}

.reader-settings__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 12px;
    border-bottom: 1px solid #eee;
}

.reader-settings__header h2 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
    line-height: 1.3;
}

.reader-settings__close {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    font-size: 24px;
    cursor: pointer;
    color: #666;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.reader-settings__close:hover {
    background: #f0f0f0;
}

.reader-settings__body {
    padding: 16px 24px 24px;
}

.reader-settings__group {
    margin-bottom: 20px;
}

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

.reader-settings__label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.5;
    margin-bottom: 8px;
}

.reader-settings__options {
    display: flex;
    gap: 8px;
}

.reader-settings__option {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: transparent;
    font-size: 14px;
    cursor: pointer;
    text-align: center;
    transition: border-color 0.2s, background 0.2s;
    color: #333;
}

.reader-settings__option:hover {
    border-color: #999;
}

.reader-settings__option.is-active {
    border-color: var(--kuehn-accent, #8b6f5a);
    background: color-mix(in srgb, var(--kuehn-accent, #8b6f5a) 8%, transparent);
    font-weight: 600;
}

.reader-settings__option--theme {
    border-width: 2px;
    padding: 8px 12px;
}

/* Settings panel: site dark mode */
[data-site-theme-resolved="dark"] .reader-settings__panel {
    background: var(--kuehn-site-surface, #1a1f28);
    color: var(--kuehn-site-text, #e7eaf0);
}

[data-site-theme-resolved="dark"] .reader-settings__header {
    border-bottom-color: var(--kuehn-site-border, #2b3340);
}

[data-site-theme-resolved="dark"] .reader-settings__close {
    color: var(--kuehn-site-muted, #a1a8b5);
}

[data-site-theme-resolved="dark"] .reader-settings__close:hover {
    background: rgba(255, 255, 255, 0.08);
}

[data-site-theme-resolved="dark"] .reader-settings__option {
    border-color: var(--kuehn-site-border, #2b3340);
    color: var(--kuehn-site-text, #e7eaf0);
}

[data-site-theme-resolved="dark"] .reader-settings__option:hover {
    border-color: var(--kuehn-site-muted, #a1a8b5);
}

[data-site-theme-resolved="dark"] .reader-settings__option.is-active {
    border-color: var(--kuehn-accent, #8b6f5a);
    background: color-mix(in srgb, var(--kuehn-accent, #8b6f5a) 8%, transparent);
}

/* --------------------------------------------------------------------------
   8. Mobile Bottom Bar (< 769px)
   -------------------------------------------------------------------------- */

.reader-mobile-bar {
    display: none;
}

@media (max-width: 768px) {
    .reader-mobile-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 10px 16px;
        padding-bottom: max(10px, env(safe-area-inset-bottom));
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-top: 1px solid rgba(0, 0, 0, 0.08);
        z-index: 9998;
        transform: translateY(0);
        transition: transform 0.3s ease;
    }

    .reader-mobile-bar[data-hidden="true"] {
        transform: translateY(100%);
    }

    .reader-mobile-bar__btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 44px;
        height: 44px;
        padding: 0 12px;
        border: none;
        border-radius: 8px;
        background: transparent;
        font-size: 13px;
        font-weight: 500;
        color: var(--kuehn-site-text, #1c2024);
        cursor: pointer;
        touch-action: manipulation;
        gap: 4px;
        text-decoration: none;
        transition: background 0.15s;
    }

    .reader-mobile-bar__btn:active {
        background: rgba(0, 0, 0, 0.06);
    }

    .reader-mobile-bar__btn[disabled] {
        opacity: 0.25;
        pointer-events: none;
    }

    .reader-mobile-bar__btn svg {
        width: 18px;
        height: 18px;
    }

    .reader-mobile-bar__progress {
        flex: 1;
        text-align: center;
        font-size: 13px;
        font-weight: 500;
        opacity: 0.6;
    }

    /* Theme-aware bottom bar */
    .chapter-reader[data-theme="sepia"] ~ .reader-mobile-bar,
    body:has(.chapter-reader[data-theme="sepia"]) .reader-mobile-bar {
        background: rgba(244, 236, 216, 0.92);
        border-top-color: rgba(92, 74, 47, 0.1);
    }

    .chapter-reader[data-theme="dark"] ~ .reader-mobile-bar,
    body:has(.chapter-reader[data-theme="dark"]) .reader-mobile-bar {
        background: rgba(26, 26, 26, 0.92);
        border-top-color: rgba(255, 255, 255, 0.08);
        color: #d4d4d4;
    }

    body:has(.chapter-reader[data-theme="dark"]) .reader-mobile-bar__btn {
        color: #d4d4d4;
    }

    /* Site dark mode override for mobile bottom bar */
    [data-site-theme-resolved="dark"] .reader-mobile-bar {
        background: rgba(26, 31, 40, 0.92);
        border-top-color: var(--kuehn-site-border, #2b3340);
        color: var(--kuehn-site-text, #e7eaf0);
    }

    [data-site-theme-resolved="dark"] .reader-mobile-bar__btn {
        color: var(--kuehn-site-text, #e7eaf0);
    }

    /* Extra bottom padding so content isn't hidden behind bar */
    .chapter-reader {
        padding-bottom: 72px;
    }
}

/* --------------------------------------------------------------------------
   9. Mobile adjustments
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
    /* Hide top progress bar – bottom bar already shows percentage */
    .reader-progress {
        display: none;
    }

    .reader-header {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        padding: 12px 0;
        margin-bottom: 24px;
    }

    .reader-header__left {
        order: 1;
        flex: 0 1 auto;
    }

    .reader-header__right {
        order: 2;
    }

    .reader-header__center {
        order: 3;
        flex-basis: 100%;
        text-align: left;
    }

    .reader-header__back {
        max-width: 180px;
        font-size: 13px;
    }

    .chapter-nav {
        grid-template-columns: 1fr;
        gap: 12px;
    }

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

/* --------------------------------------------------------------------------
   10. Keyboard Shortcut Hint (desktop only)
   -------------------------------------------------------------------------- */

.reader-keyboard-hint {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.75);
    color: #fff;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 12px;
    z-index: 9000;
    opacity: 0;
    animation: readerHintFade 4s ease-in-out forwards;
    pointer-events: none;
}

@keyframes readerHintFade {
    0%   { opacity: 0; transform: translateY(10px); }
    10%  { opacity: 1; transform: translateY(0); }
    80%  { opacity: 1; }
    100% { opacity: 0; }
}

@media (max-width: 1023px) {
    .reader-keyboard-hint {
        display: none;
    }
}

/* --------------------------------------------------------------------------
   11. Print styles
   -------------------------------------------------------------------------- */

@media print {
    .reader-header,
    .reader-progress,
    .reader-settings,
    .reader-settings-toggle,
    .reader-keyboard-hint,
    .reader-mobile-bar,
    .chapter-nav {
        display: none !important;
    }

    .chapter-reader[data-theme="sepia"],
    .chapter-reader[data-theme="dark"] {
        background: #fff !important;
        color: #000 !important;
    }
}