:root {
    --ink: #25313f;
    --muted: #607086;
    --line: #d9e1e8;
    --soft-line: #e8edf1;
    --paper: #fffdf8;
    --surface: #ffffff;
    --wash: #f4f7f3;
    --accent: #d9572b;
    --accent-dark: #a94423;
    --accent-soft: #fff2ea;
    --green: #2f7659;
    --shadow: 0 18px 46px rgba(43, 52, 64, 0.12);
    --shadow-soft: 0 10px 28px rgba(43, 52, 64, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overscroll-behavior-y: contain;
}

body {
    margin: 0;
    background: var(--wash);
    color: var(--ink);
    font-family: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    line-height: 1.65;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
    touch-action: pan-y;
}

body.is-modal-open {
    overflow: hidden;
}

body.is-drag-scrolling,
body.is-drag-scrolling * {
    cursor: grabbing !important;
}

input,
textarea,
select,
[contenteditable="true"] {
    -webkit-user-select: text;
    user-select: text;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

img,
a {
    -webkit-user-drag: none;
}

.offline-shell {
    width: min(100% - 40px, 1360px);
    margin: 0 auto;
    padding: 34px 0 56px;
}

.eyebrow,
.meta {
    margin: 0;
    color: var(--accent-dark);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0;
    text-transform: uppercase;
}

.series-hero {
    display: grid;
    grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
    gap: 30px;
    align-items: stretch;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.series-hero__media {
    min-height: 315px;
    border: 1px solid var(--soft-line);
    border-radius: 8px;
    background: #f8faf8;
    overflow: hidden;
}

.series-hero__image,
.series-detail-modal__image,
.category-card__image,
.index-series-card__image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.series-hero__image.is-fallback,
.series-detail-modal__image.is-fallback,
.category-card__image.is-fallback,
.index-series-card__image.is-fallback {
    display: grid;
    place-items: center;
    min-height: 100%;
    padding: 22px;
    color: var(--muted);
    text-align: center;
    font-weight: 900;
}

.series-hero__body {
    display: grid;
    align-content: center;
    gap: 14px;
    min-width: 0;
}

.series-hero h1,
.index-hero h1 {
    margin: 0;
    color: var(--ink);
    font-size: clamp(32px, 4vw, 56px);
    line-height: 1.12;
    letter-spacing: 0;
}

.series-hero__summary {
    max-width: 820px;
    margin: 0;
    color: var(--muted);
    font-size: 17px;
}

.fact-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 4px;
}

.fact-pills span {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 6px 11px;
    border: 1px solid var(--soft-line);
    border-radius: 999px;
    background: #fbfcfc;
    color: #344052;
    font-size: 13px;
    font-weight: 800;
}

.series-detail-button,
.modal-primary-link,
.book-preview-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    min-height: 42px;
    margin-top: 4px;
    padding: 0 18px;
    border: 0;
    border-radius: 8px;
    background: var(--accent);
    color: #ffffff;
    font: inherit;
    font-weight: 900;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(217, 87, 43, 0.2);
}

.book-card__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 4px;
}

.book-preview-button {
    min-height: 38px;
    padding: 0 15px;
    background: var(--green);
    box-shadow: 0 10px 20px rgba(47, 118, 89, 0.18);
}

.section-heading {
    margin: 34px 0 18px;
    padding: 22px 24px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fbfb 100%);
}

.section-heading h2,
.index-category h2 {
    margin: 2px 0 8px;
    font-size: 28px;
    line-height: 1.22;
}

.section-heading p:not(.eyebrow) {
    margin: 0;
    color: var(--muted);
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 540px), 1fr));
    gap: 18px;
}

.book-card {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 18px;
    align-items: stretch;
    min-height: 330px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.book-card__cover {
    display: grid;
    min-width: 0;
    min-height: 298px;
    border: 1px solid var(--soft-line);
    border-radius: 8px;
    background: #f8faf8;
    overflow: hidden;
}

.book-cover-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.book-cover-image.is-fallback {
    display: grid;
    place-items: center;
    min-height: 298px;
    padding: 18px;
    color: var(--muted);
    text-align: center;
    font-weight: 900;
}

.book-card__body {
    display: grid;
    align-content: center;
    gap: 10px;
    min-width: 0;
}

.book-card h3 {
    margin: 0;
    color: var(--ink);
    font-size: 22px;
    line-height: 1.28;
    letter-spacing: 0;
}

.book-card p:not(.meta) {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
}

.empty-state {
    padding: 28px;
    border: 1px dashed var(--line);
    border-radius: 8px;
    background: var(--surface);
    color: var(--muted);
}

.series-detail-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.offline-preview-modal {
    position: fixed;
    inset: 0;
    z-index: 1100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.offline-preview-modal.is-visible {
    display: flex;
}

.offline-preview-modal__backdrop {
    position: absolute;
    inset: 0;
    border: 0;
    background: rgba(18, 25, 31, 0.76);
    cursor: pointer;
}

.offline-preview-modal__dialog {
    position: relative;
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    border-radius: 0;
    background: #f5f7f7;
    overflow: hidden;
}

.offline-preview-modal__head,
.offline-preview-modal__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--line);
    background: #ffffff;
}

.offline-preview-modal__foot {
    border-top: 1px solid var(--line);
    border-bottom: 0;
}

.offline-preview-modal__meta {
    margin: 0 0 2px;
    color: var(--accent-dark);
    font-size: 12px;
    font-weight: 900;
}

.offline-preview-modal h2 {
    margin: 0;
    color: var(--ink);
    font-size: 23px;
    line-height: 1.25;
}

.offline-preview-modal__tools {
    display: flex;
    align-items: center;
    gap: 12px;
}

.offline-preview-modal__page {
    min-width: 82px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 900;
    text-align: right;
}

.offline-preview-modal__status {
    min-height: 0;
    padding: 0 20px;
    color: var(--muted);
    font-weight: 800;
}

.offline-preview-modal__status:not(:empty) {
    padding-top: 14px;
    padding-bottom: 14px;
}

.offline-preview-reader {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr) 48px;
    gap: 12px;
    min-height: 0;
    padding: 18px 20px;
}

.offline-preview-reader__stage {
    min-width: 0;
    min-height: 0;
    display: grid;
    place-items: center;
    overflow: hidden;
}

.offline-preview-reader__spread {
    display: grid;
    grid-template-columns: var(--offline-preview-spread-columns, 1fr 1fr);
    gap: 14px;
    width: var(--offline-preview-spread-width, 100%);
    height: var(--offline-preview-spread-height, 100%);
    max-width: 100%;
    max-height: 100%;
    aspect-ratio: var(--offline-preview-spread-aspect, 1.42);
}

.offline-preview-reader__spread.is-single {
    width: var(--offline-preview-spread-width, min(100%, 620px));
}

.offline-preview-page {
    position: relative;
    display: grid;
    min-width: 0;
    min-height: 0;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.offline-preview-page--empty {
    background: repeating-linear-gradient(
        -45deg,
        #f3f5f5,
        #f3f5f5 12px,
        #eceff0 12px,
        #eceff0 24px
    );
    box-shadow: none;
}

.offline-preview-page img,
.offline-preview-page__image-button {
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
}

.offline-preview-page img {
    display: block;
    object-fit: contain;
    object-position: center center;
    background: #ffffff;
}

.offline-preview-page__image-button {
    position: relative;
    display: block;
    padding: 0;
    border: 0;
    background: #ffffff;
    cursor: pointer;
}

.offline-preview-page__body-badge {
    position: absolute;
    right: 12px;
    bottom: 12px;
    padding: 6px 9px;
    border-radius: 999px;
    background: rgba(37, 49, 63, 0.88);
    color: #ffffff;
    font-size: 12px;
    font-weight: 900;
}

.offline-preview-page__body-panel {
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 12px;
    display: none;
    max-height: min(55%, 360px);
    padding: 14px 15px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 18px 42px rgba(43, 52, 64, 0.18);
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    touch-action: pan-y;
}

.offline-preview-page.is-body-open .offline-preview-page__body-panel {
    display: block;
}

.offline-preview-page.is-body-open .offline-preview-page__body-badge {
    display: none;
}

.offline-preview-page__body-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
    color: var(--ink);
    font-weight: 900;
}

.offline-preview-page__body-close {
    display: inline-grid;
    place-items: center;
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #ffffff;
    color: var(--ink);
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
}

.offline-preview-page__body-text {
    margin: 0;
    color: #344052;
    font-size: 15px;
    line-height: 1.7;
    white-space: pre-wrap;
}

.offline-preview-reader__nav {
    align-self: center;
    display: inline-grid;
    place-items: center;
    width: 48px;
    height: 74px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    color: var(--ink);
    font-size: 42px;
    line-height: 1;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
}

.offline-preview-reader__nav:disabled {
    opacity: 0.35;
    cursor: default;
}

.offline-preview-modal__range {
    flex: 1 1 auto;
    max-width: 460px;
    accent-color: var(--accent);
}

.series-detail-modal.is-visible {
    display: flex;
}

.series-detail-modal__backdrop {
    position: absolute;
    inset: 0;
    border: 0;
    background: rgba(24, 31, 38, 0.64);
    cursor: pointer;
}

.series-detail-modal__dialog {
    position: relative;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    width: min(100%, 1120px);
    max-height: min(90vh, 900px);
    border-radius: 8px;
    background: var(--paper);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.series-detail-modal__head,
.series-detail-modal__actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 24px;
    border-bottom: 1px solid var(--line);
    background: #ffffff;
}

.series-detail-modal__actions {
    justify-content: flex-end;
    border-top: 1px solid var(--line);
    border-bottom: 0;
}

.series-detail-modal__head h2 {
    margin: 2px 0 0;
    font-size: 26px;
    line-height: 1.22;
}

.modal-close-button {
    display: inline-grid;
    place-items: center;
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #ffffff;
    color: var(--ink);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}

.series-detail-modal__layout {
    min-height: 0;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    touch-action: pan-y;
}

.series-detail-modal__overview {
    display: grid;
    grid-template-columns: minmax(240px, 320px) minmax(0, 1fr);
    gap: 22px;
    align-items: stretch;
    padding: 24px 30px 20px;
    border-bottom: 1px solid var(--soft-line);
}

.series-detail-modal__media {
    min-height: 240px;
    border: 1px solid var(--soft-line);
    border-radius: 8px;
    background: #f8faf8;
    overflow: hidden;
}

.series-detail-modal__summary {
    display: grid;
    align-content: start;
    gap: 16px;
    min-width: 0;
}

.series-fact-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
}

.series-fact-grid div {
    padding: 13px;
    border: 1px solid var(--soft-line);
    border-radius: 8px;
    background: #ffffff;
}

.series-fact-grid dt {
    color: var(--muted);
    font-size: 12px;
    font-weight: 900;
}

.series-fact-grid dd {
    margin: 5px 0 0;
    color: var(--ink);
    font-weight: 900;
}

.series-detail-modal__content {
    display: grid;
    gap: 18px;
    padding: 24px 30px 30px;
}

.series-detail-block {
    display: grid;
    gap: 8px;
    padding-top: 18px;
    border-top: 1px solid var(--soft-line);
}

.series-detail-block:first-child,
.series-detail-block--summary {
    padding-top: 0;
    border-top: 0;
}

.series-detail-block h3 {
    margin: 0;
    color: var(--ink);
    font-size: 18px;
    line-height: 1.3;
}

.series-detail-block p {
    margin: 0;
    color: var(--muted);
}

.series-detail-brochure__box {
    max-width: 100%;
    overflow: hidden;
    padding: 20px 22px;
    border: 1px solid var(--soft-line);
    border-radius: 8px;
    background: #fbfcfc;
}

.brochure-rich-text {
    max-width: 100%;
    color: var(--muted);
    overflow-wrap: anywhere;
    word-break: keep-all;
}

.brochure-rich-text > :first-child {
    margin-top: 0;
}

.brochure-rich-text > :last-child {
    margin-bottom: 0;
}

.brochure-rich-text h1,
.brochure-rich-text h2,
.brochure-rich-text h3,
.brochure-rich-text h4 {
    color: var(--ink);
    line-height: 1.28;
}

.brochure-rich-text p {
    margin: 0 0 12px;
}

.brochure-rich-text ul,
.brochure-rich-text ol {
    margin: 10px 0 14px;
    padding-left: 22px;
}

.brochure-rich-text li + li {
    margin-top: 6px;
}

.brochure-rich-text img,
.brochure-rich-text video {
    max-width: 100%;
    height: auto;
}

.brochure-rich-text table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    touch-action: pan-x pan-y;
}

.index-hero {
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.index-hero p:not(.eyebrow) {
    max-width: 820px;
    margin: 10px 0 0;
    color: var(--muted);
}

.category-browser {
    margin-top: 30px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 16px;
}

.category-card {
    display: grid;
    grid-template-rows: 180px auto;
    min-height: 326px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.category-card.is-active {
    border-color: rgba(217, 87, 43, 0.52);
    box-shadow: 0 16px 36px rgba(217, 87, 43, 0.16);
}

.category-card__media {
    display: block;
    min-height: 180px;
    border-bottom: 1px solid var(--soft-line);
    background: #f8faf8;
    overflow: hidden;
}

.category-card__body {
    display: grid;
    gap: 6px;
    align-content: center;
    padding: 16px;
}

.category-card strong {
    color: var(--ink);
    font-size: 22px;
    line-height: 1.28;
}

.category-card__description,
.index-series-card__description {
    display: -webkit-box;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.5;
    overflow: hidden;
    -webkit-box-orient: vertical;
}

.category-card__description {
    -webkit-line-clamp: 3;
}

.category-card small {
    color: var(--muted);
    font-weight: 800;
}

.category-series-area {
    margin-top: 28px;
}

.category-detail-placeholder,
.category-detail-panel {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.category-detail-placeholder h2,
.category-detail-panel h2 {
    margin: 2px 0 8px;
    font-size: 28px;
    line-height: 1.22;
}

.category-detail-placeholder p:not(.eyebrow) {
    margin: 0;
    color: var(--muted);
}

.has-category-js .category-detail-panel {
    display: none;
}

.has-category-js .category-detail-panel.is-active {
    display: block;
}

.category-detail-placeholder.is-hidden {
    display: none;
}

.category-detail-panel__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.category-detail-panel__head p:not(.eyebrow) {
    max-width: 860px;
    margin: 8px 0 0;
    color: var(--muted);
}

.category-detail-panel__head > span {
    flex: 0 0 auto;
    color: var(--muted);
    font-size: 13px;
    font-weight: 900;
}

.index-category {
    margin-top: 30px;
}

.index-series-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
    gap: 16px;
}

.index-series-card {
    display: grid;
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 14px;
    align-items: center;
    min-height: 168px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.index-series-card__media {
    display: block;
    height: 112px;
    border: 1px solid var(--soft-line);
    border-radius: 8px;
    background: #f8faf8;
    overflow: hidden;
}

.index-series-card__body {
    display: grid;
    gap: 4px;
    min-width: 0;
}

.index-series-card strong {
    color: var(--ink);
    font-size: 18px;
    line-height: 1.3;
}

.index-series-card small {
    color: var(--muted);
    font-weight: 800;
}

.index-series-card__description {
    -webkit-line-clamp: 2;
}

.consultation-original {
    display: none;
    margin: 4px 0 0;
    color: #755b69;
    font-size: 12px;
    font-weight: 700;
    line-height: 1.55;
    letter-spacing: 0;
}

body.is-consultation-mode .consultation-original {
    display: block;
}

.consultation-original__label {
    display: inline;
    margin-right: 6px;
    color: var(--accent-dark);
    font-weight: 900;
}

.consultation-original__text {
    color: #755b69;
    font-weight: 700;
}

.category-card .consultation-original,
.index-series-card .consultation-original {
    display: none;
    font-size: 11px;
    line-height: 1.45;
}

body.is-consultation-mode .category-card .consultation-original,
body.is-consultation-mode .index-series-card .consultation-original {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.series-detail-block .consultation-original,
.series-detail-modal__summary .consultation-original,
.book-card__body .consultation-original {
    max-width: 880px;
}

@media (max-width: 900px) {
    .offline-shell {
        width: min(100% - 28px, 1360px);
        padding-top: 22px;
    }

    .series-hero,
    .series-detail-modal__overview {
        grid-template-columns: 1fr;
    }

    .series-hero__media {
        min-height: 260px;
    }

    .book-card {
        grid-template-columns: 180px minmax(0, 1fr);
        min-height: 280px;
    }

    .book-card__cover,
    .book-cover-image.is-fallback {
        min-height: 248px;
    }

    .series-fact-grid {
        grid-template-columns: 1fr;
    }

    .offline-preview-modal__dialog {
        width: 100vw;
        height: 100vh;
        height: 100dvh;
    }

    .offline-preview-reader {
        grid-template-columns: 40px minmax(0, 1fr) 40px;
        gap: 8px;
        padding: 12px;
    }

    .offline-preview-reader__nav {
        width: 40px;
        height: 64px;
        font-size: 34px;
    }
}

@media (max-width: 640px) {
    .series-hero,
    .section-heading,
    .index-hero,
    .category-detail-placeholder,
    .category-detail-panel {
        padding: 18px;
    }

    .book-card,
    .index-series-card {
        grid-template-columns: 1fr;
    }

    .category-detail-panel__head {
        align-items: flex-start;
        flex-direction: column;
    }

    .book-card__cover {
        min-height: 0;
    }

    .book-cover-image {
        height: auto;
    }

    .book-cover-image.is-fallback {
        min-height: 0;
        aspect-ratio: 2 / 3;
    }

    .series-detail-modal {
        padding: 12px;
    }

    .series-detail-modal__head,
    .series-detail-modal__actions,
    .series-detail-modal__overview,
    .series-detail-modal__content {
        padding-left: 18px;
        padding-right: 18px;
    }

    .offline-preview-modal__head,
    .offline-preview-modal__foot {
        align-items: flex-start;
        flex-direction: column;
    }

    .offline-preview-modal__tools {
        width: 100%;
        justify-content: space-between;
    }

    .offline-preview-reader {
        grid-template-columns: 1fr;
        grid-template-rows: minmax(0, 1fr) auto;
    }

    .offline-preview-reader__stage {
        order: 1;
    }

    .offline-preview-reader__nav {
        order: 2;
        width: 48%;
        height: 46px;
    }

    .offline-preview-reader__nav--prev {
        justify-self: start;
    }

    .offline-preview-reader__nav--next {
        justify-self: end;
        margin-top: -46px;
    }

    .offline-preview-reader__spread {
        width: var(--offline-preview-spread-width, 100%);
        height: var(--offline-preview-spread-height, 100%);
    }
}