:root {
    --bg: #eeebea;
    --surface: #ffffff;
    --surface-alt: #f2f1f0;
    --surface-mid: #e6e6e6;
    --text: #000000;
    --muted: #6f6f6f;
    --line: #d0d0d0;
    --line-strong: #9f9f9f;
    --accent: #b2542b;
    --accent-hover: #8f3d1b;
    --accent-blue: #2c7ab9;
    --danger: #b33a32;
    --danger-soft: #f7e6e3;
    --footer: #404040;
    --focus: #b2542b;
    --font-body: YakuHanJP, "中ゴシックBBB", "Gothic Medium BBB", YuGothic, "游ゴシック体", Meiryo, "メイリオ", Osaka, "MS PGothic", Arial, Helvetica, sans-serif;
    --font-display: YakuHanJP, "見出ゴMB31", "Midashi Go MB31", YuGothic, "游ゴシック体", Meiryo, sans-serif;
    --font-serif: classico-urw, "Cormorant Garamond", Georgia, "Times New Roman", serif;
    --font-number: Manrope, Arial, Helvetica, sans-serif;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 30px;
    --space-xl: 48px;
    --space-2xl: 72px;
    --content-width: 1120px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--text);
    background: var(--bg);
    font-family: var(--font-body);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.875;
    letter-spacing: 0;
    font-feature-settings: normal;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover,
a:focus-visible {
    color: var(--accent);
}

button,
input,
select,
textarea {
    font: inherit;
    letter-spacing: 0;
}

button {
    cursor: pointer;
}

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
}

.site-header {
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg) 90%, #ffffff);
}

.site-header__inner {
    width: min(100% - 64px, var(--content-width));
    min-height: 92px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}

.brand {
    min-width: 0;
    display: inline-flex;
    align-items: center;
    gap: 14px;
    color: var(--text);
}

.brand__logo {
    width: 42px;
    height: 42px;
    object-fit: contain;
    background: var(--surface-alt);
}

.brand__text {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.brand__name {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 500;
    line-height: 1.2;
}

.brand__label {
    color: var(--muted);
    font-family: var(--font-serif);
    font-size: 13px;
    font-weight: 400;
    line-height: 1.4;
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 4px 22px;
}

.site-nav__link,
.site-nav__button {
    min-height: 44px;
    padding: 6px 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-bottom: 1px solid transparent;
    background: transparent;
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    line-height: 1.875;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link.is-active,
.site-nav__button:hover,
.site-nav__button:focus-visible {
    border-bottom-color: var(--accent);
    color: var(--accent);
}

.site-nav__form {
    margin: 0;
}

.page-shell {
    width: min(100% - 64px, var(--content-width));
    margin: 0 auto;
    padding: var(--space-xl) 0 var(--space-2xl);
}

.messages {
    margin-bottom: var(--space-lg);
    display: grid;
    gap: 10px;
}

.page-header {
    margin-bottom: var(--space-xl);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-xl);
    align-items: end;
}

.page-header__copy {
    min-width: 0;
}

.page-kicker {
    margin: 0 0 10px;
    color: var(--accent);
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 400;
    line-height: 1.2;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 14px;
    font-family: var(--font-display);
    font-size: 46px;
    font-weight: 500;
    line-height: 1.05;
}

h2 {
    margin-bottom: var(--space-md);
    font-size: 20px;
    font-weight: 500;
    line-height: 1.4;
}

h3 {
    margin-bottom: 8px;
    font-size: 17px;
    font-weight: 500;
    line-height: 1.5;
}

.page-lead {
    max-width: 680px;
    margin: 0;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.85;
}

.btn {
    min-height: 44px;
    padding: 9px 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface-alt);
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    text-align: center;
    text-decoration: none;
}

.btn:hover,
.btn:focus-visible {
    border-color: var(--accent);
    background: #eaded8;
    color: var(--accent);
}

.btn-primary {
    border-color: var(--accent);
    background: var(--accent);
    color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
    border-color: var(--accent-hover);
    background: var(--accent-hover);
    color: #ffffff;
}

.btn-secondary {
    background: var(--surface-alt);
}

.btn-danger {
    border-color: var(--danger);
    color: var(--danger);
}

.btn-danger:hover,
.btn-danger:focus-visible {
    background: var(--danger-soft);
    color: var(--danger);
}

.icon-btn {
    width: 44px;
    height: 44px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface-alt);
    color: var(--text);
    font-family: var(--font-number);
    font-size: 18px;
    font-weight: 400;
    line-height: 1;
}

.icon-btn:hover,
.icon-btn:focus-visible {
    border-color: var(--accent);
    background: #eaded8;
    color: var(--accent);
}

.icon-btn-danger {
    border-color: color-mix(in srgb, var(--danger) 55%, var(--line));
    color: var(--danger);
}

.icon-btn-danger:hover,
.icon-btn-danger:focus-visible {
    border-color: var(--danger);
    background: var(--danger-soft);
    color: var(--danger);
}

.panel,
.filter-panel,
.form-panel,
.auth-panel {
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface);
}

.filter-panel,
.form-panel {
    padding: var(--space-lg);
}

.bookmark-panel {
    border: 0;
    background: transparent;
}

.filter-panel {
    margin-bottom: var(--space-lg);
    display: grid;
    grid-template-columns: minmax(240px, 2fr) minmax(150px, 1fr) minmax(128px, 1fr) auto;
    gap: var(--space-md);
    align-items: end;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.field label,
.field-label {
    color: var(--muted);
    font-size: 13px;
    font-weight: 500;
    line-height: 1.4;
}

.field input,
.field select,
.field textarea,
.form-control {
    width: 100%;
    min-height: 46px;
    padding: 11px 13px;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface);
    color: var(--text);
}

.field input:focus,
.field select:focus,
.field textarea:focus,
.form-control:focus {
    border-color: var(--accent);
    outline: 2px solid color-mix(in srgb, var(--accent) 22%, transparent);
    outline-offset: 0;
}

.field textarea,
textarea.form-control {
    min-height: 136px;
    resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
    color: #9a9a9a;
}

.toolbar {
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.sort-tabs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.sort-tabs__label {
    color: var(--muted);
    font-size: 12px;
    font-weight: 500;
}

.sort-tab {
    min-height: 32px;
    padding: 3px 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface-alt);
    color: var(--text);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.5;
}

.sort-tab:hover,
.sort-tab:focus-visible,
.sort-tab.is-active {
    border-color: var(--accent);
    background: #eaded8;
    color: var(--accent);
}

.book-grid {
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: var(--space-lg);
    list-style: none;
}

.book-card {
    min-height: 100%;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface);
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    gap: var(--space-md);
    padding: var(--space-md);
}

.book-cover {
    width: 104px;
    aspect-ratio: 3 / 4;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface-mid);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-cover__placeholder {
    padding: 10px;
    color: var(--muted);
    font-family: var(--font-number);
    font-size: 11px;
    font-weight: 400;
    line-height: 1.4;
    text-align: center;
}

.cover-preview {
    width: 104px;
    aspect-ratio: 3 / 4;
    margin-top: 4px;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface-mid);
    object-fit: cover;
    display: block;
}

.book-card__body {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.book-card__head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: start;
}

.book-title {
    margin: 0 0 6px;
    overflow-wrap: anywhere;
}

.book-title a {
    color: var(--text);
}

.book-title a:hover,
.book-title a:focus-visible {
    color: var(--accent);
}

.book-author {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
    overflow-wrap: anywhere;
}

.book-meta-grid {
    margin: auto 0 0;
    display: flex;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 6px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.5;
}

.book-meta-grid dt,
.book-meta-grid dd {
    margin: 0;
}

.book-meta-grid dt {
    padding: 2px 8px;
    border-radius: 2px;
    background: var(--surface-alt);
    color: var(--text);
    font-size: 12px;
    font-weight: 500;
}

.book-meta-grid dd {
    padding: 2px 8px 2px 0;
    overflow-wrap: anywhere;
}

.empty-state {
    margin: 0;
    padding: var(--space-xl);
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface-alt);
    color: var(--muted);
    text-align: center;
}

.pagination {
    margin-top: var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}

.pagination__item {
    min-width: 38px;
    min-height: 38px;
    padding: 6px 11px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface-alt);
    font-family: var(--font-number);
    font-size: 13px;
    font-weight: 400;
}

.pagination__item:hover,
.pagination__item:focus-visible,
.pagination__item.is-current {
    border-color: var(--accent);
    background: #eaded8;
    color: var(--accent);
}

.form-panel {
    display: grid;
    gap: var(--space-md);
}

.form-panel + .form-panel {
    margin-top: var(--space-lg);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-md);
}

.form-grid .field--full {
    grid-column: 1 / -1;
}

.form-actions {
    margin-top: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 10px;
}

.lookup-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: end;
}

.reader-wrap {
    margin-top: var(--space-md);
    display: grid;
    gap: var(--space-sm);
}

#reader {
    width: min(100%, 420px);
    min-height: 220px;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface-alt);
}

.status-text {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
}

.message,
.errorlist {
    margin: 0 0 var(--space-md);
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface-alt);
    color: var(--text);
}

.success {
    border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
    color: var(--accent);
}

.error,
.errorlist {
    border-color: color-mix(in srgb, var(--danger) 55%, var(--line));
    background: var(--danger-soft);
    color: var(--danger);
}

.bookmark-list {
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
    list-style: none;
}

.bookmark-item {
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface);
    padding: var(--space-md);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-md);
    align-items: center;
}

.bookmark-title {
    margin: 0;
    font-size: 18px;
    font-weight: 500;
    line-height: 1.45;
    overflow-wrap: anywhere;
}

.bookmark-meta {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.7;
    overflow-wrap: anywhere;
}

.bookmark-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.bookmark-edit {
    position: relative;
}

.bookmark-edit summary {
    list-style: none;
}

.bookmark-edit summary::-webkit-details-marker {
    display: none;
}

.bookmark-edit__form {
    width: min(360px, calc(100vw - 48px));
    margin-top: 8px;
    padding: var(--space-md);
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface);
    display: grid;
    gap: 10px;
    position: absolute;
    right: 0;
    z-index: 5;
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: var(--space-xl) 16px;
    background: var(--bg);
}

.auth-panel {
    width: min(100%, 440px);
    padding: var(--space-xl);
}

.auth-brand {
    margin-bottom: var(--space-lg);
}

.auth-brand__name {
    margin: 0;
    font-family: var(--font-display);
    font-size: 44px;
    font-weight: 500;
    line-height: 1.05;
}

.auth-brand__lead {
    margin: 12px 0 0;
    color: var(--muted);
    line-height: 1.85;
}

.auth-panel form,
.form-stack {
    display: grid;
    gap: var(--space-md);
}

.auth-panel label {
    color: var(--muted);
    font-size: 13px;
    font-weight: 500;
}

.auth-panel input {
    width: 100%;
    min-height: 46px;
    margin-top: 8px;
    padding: 11px 13px;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface);
}

.auth-panel .btn {
    width: 100%;
}

.site-footer {
    background: var(--footer);
    color: #ffffff;
}

.site-footer__inner {
    width: min(100% - 64px, var(--content-width));
    margin: 0 auto;
    padding: 42px 0 56px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-lg);
}

.site-footer__brand {
    margin: 0;
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 400;
    line-height: 1.2;
}

.site-footer__meta {
    margin: 8px 0 0;
    color: rgba(255, 255, 255, 0.72);
    font-family: var(--font-number);
    font-size: 12px;
    line-height: 1.6;
}

@media (max-width: 900px) {
    .site-header__inner,
    .page-shell,
    .site-footer__inner {
        width: min(100% - 40px, var(--content-width));
    }

    .filter-panel {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .site-header__inner {
        min-height: auto;
        padding: 18px 0;
        align-items: flex-start;
        flex-direction: column;
        gap: 14px;
    }

    .site-nav {
        width: 100%;
        justify-content: flex-start;
        gap: 4px 18px;
    }

    .site-nav__link,
    .site-nav__button {
        font-size: 14px;
    }

    .page-shell {
        padding-top: var(--space-lg);
    }

    .page-header {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    h1 {
        font-size: 34px;
    }

    .page-lead {
        font-size: 16px;
    }

    .filter-panel,
    .lookup-row {
        grid-template-columns: 1fr;
    }

    .toolbar {
        align-items: stretch;
        flex-direction: column;
    }

    .book-grid {
        grid-template-columns: 1fr;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .bookmark-item {
        grid-template-columns: 1fr;
        align-items: stretch;
    }

    .bookmark-actions {
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .bookmark-edit {
        width: 100%;
    }

    .bookmark-edit__form {
        width: 100%;
        position: static;
    }

    .site-footer__inner {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 460px) {
    .site-header__inner,
    .page-shell,
    .site-footer__inner {
        width: min(100% - 28px, var(--content-width));
    }

    h1,
    .auth-brand__name {
        font-size: 31px;
    }

    .filter-panel,
    .form-panel,
    .auth-panel {
        padding: var(--space-md);
    }

    .book-card {
        grid-template-columns: 82px minmax(0, 1fr);
        padding: 12px;
        gap: 12px;
    }

    .book-cover {
        width: 82px;
    }

    .book-card__head {
        grid-template-columns: 1fr;
    }

    .btn {
        width: 100%;
    }

    .form-actions .btn,
    .page-header .btn,
    .filter-panel .btn {
        width: 100%;
    }
}