/**
 * ETNA – Layout und Komponenten (Mobile first)
 *
 * Werte kommen aus tokens.css. Breakpoints: 48em (Menü neben Inhalt), 64em (Volumes-Spalte rechts).
 */

/* ------------------------------------------------------------------ Basis */

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

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

body {
    margin: 0;
    padding: 0;
    background: var(--color-page);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
}

/* svg bewusst nicht: MathJax setzt Breite/Höhe der Formel-SVGs selbst, height:auto würde sie verzerren */
img,
video {
    max-width: 100%;
    height: auto;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    font-weight: 400;
    color: var(--color-heading);
    line-height: 1.25;
    margin: 1.5em 0 0.4em;
}

h1 {
    font-size: 1.75rem;
    margin-top: 0.75em;
}

h2 {
    font-size: 1.35rem;
    color: var(--color-heading-light);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.15em;
}

h3 {
    font-size: 1.15rem;
    color: var(--color-heading-light);
}

p,
ul,
ol,
dl {
    margin: 0 0 1em;
}

ul,
ol {
    padding-left: 1.5em;
}

li {
    margin-bottom: 0.25em;
}

dt {
    font-weight: bold;
}

dd {
    margin: 0 0 1em 1em;
}

code,
tt {
    font-family: var(--font-mono);
    font-size: 0.95em;
}

table {
    border-collapse: collapse;
    margin-bottom: 1em;
}

th,
td {
    padding: 0.4em 0.6em;
    text-align: left;
    vertical-align: top;
}

figure {
    margin: 1em 0;
}

/* ------------------------------------------------------------------ Links und Fokus */

a {
    color: var(--color-link);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.15em;
}

a:visited {
    color: var(--color-link-visited);
}

a:hover,
a:active {
    color: var(--color-link-hover);
    text-decoration-thickness: 2px;
}

/* Gut sichtbarer, zweifarbiger Fokusrahmen (auf hellen und dunklen Flächen) */
:focus-visible {
    outline: 2px solid var(--color-focus-inner);
    outline-offset: 0;
    box-shadow: 0 0 0 4px var(--color-focus-outer);
}

main:focus {
    outline: none;
    box-shadow: none;
}

/* ------------------------------------------------------------------ Hilfsklassen */

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.skip-link {
    position: absolute;
    left: var(--space-2);
    top: -10em;
    z-index: 100;
    padding: var(--space-2) var(--space-4);
    background: var(--color-surface);
    color: var(--color-link-hover);
    font-weight: bold;
}

.skip-link:focus {
    top: var(--space-2);
}

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

.small {
    font-size: var(--font-size-small);
}

.notice {
    background: var(--color-notice-bg);
    border-left: 4px solid #b37400;
    padding: var(--space-2) var(--space-3);
}

/* ------------------------------------------------------------------ Seitenrahmen */

.site {
    max-width: var(--page-max-width);
    margin: 0 auto;
    background: var(--color-surface);
}

@media (min-width: 48em) {
    body {
        padding: var(--space-2) var(--space-2);
    }

    .site {
        padding: 5px;
    }
}

/* ------------------------------------------------------------------ Header */

.site-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
        "kent ricam"
        "title title";
    align-items: start;
    gap: var(--space-2) var(--space-4);
    padding: var(--space-3) var(--space-3) var(--space-4);
    background: var(--color-page);
}

.site-header__logo {
    display: block;
    line-height: 0;
}

.site-header__logo img {
    width: auto;
    max-height: 2.75rem;
}

.site-header__logo--kent {
    grid-area: kent;
}

.site-header__logo--ricam {
    grid-area: ricam;
    justify-self: end;
}

.site-title {
    grid-area: title;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    text-decoration: none;
    color: var(--color-title);
    font-family: var(--font-title);
    line-height: 1.1;
    text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.15);
}

.site-title:visited,
.site-title:hover {
    color: var(--color-title);
}

.site-title__short {
    font-size: clamp(2rem, 7vw, 3.5rem);
    letter-spacing: 0.35em;
    margin-right: -0.35em; /* Ausgleich für den Buchstabenabstand */
}

.site-title__long {
    font-size: clamp(1.05rem, 3.6vw, 2.4rem);
}

@media (min-width: 48em) {
    .site-header {
        grid-template-columns: minmax(8rem, 11rem) 1fr minmax(8rem, 10rem);
        grid-template-areas: "kent title ricam";
        align-items: center;
        padding: var(--space-3) var(--space-2);
        min-height: 6.875rem; /* 110px, früher 140px */
    }

    .site-header__logo {
        align-self: start;
    }

    .site-header__logo img {
        max-height: 3.25rem;
    }

    .site-title__short {
        font-size: clamp(2rem, 4vw, 2.75rem);
    }

    .site-title__long {
        font-size: clamp(1.2rem, 2.6vw, 2rem);
    }
}

/* ------------------------------------------------------------------ Breadcrumbs */

.breadcrumbs {
    background: var(--color-primary);
    color: var(--color-on-primary);
    margin-top: 5px;
    padding: var(--space-2) var(--space-3);
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}

.breadcrumbs li {
    margin: 0 var(--space-3) 0 0;
}

.breadcrumbs li::before {
    content: "\25B8";
    content: "\25B8" / "";
    margin-right: var(--space-1);
    opacity: 0.8;
}

.breadcrumbs a,
.breadcrumbs a:visited {
    color: var(--color-on-primary);
    text-decoration: none;
}

.breadcrumbs a[href]:hover {
    text-decoration: underline;
}

/* ------------------------------------------------------------------ Spaltenlayout */

.layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
        "nav"
        "main"
        "aside";
    gap: var(--space-4);
    padding: var(--space-3);
}

.main-nav {
    grid-area: nav;
}

.content {
    grid-area: main;
    min-width: 0;
    max-width: var(--content-max-width);
    padding-bottom: var(--space-6);
}

.volumes-nav {
    grid-area: aside;
}

@media (min-width: 48em) {
    .layout {
        grid-template-columns: var(--nav-width) minmax(0, 1fr);
        grid-template-areas:
            "nav main"
            "nav aside";
        align-items: start;
        gap: var(--space-4) var(--space-6);
        padding: var(--space-5) var(--space-3) var(--space-4);
        min-height: 40rem;
    }
}

@media (min-width: 64em) {
    .layout--with-aside {
        grid-template-columns: var(--nav-width) minmax(0, 1fr) var(--aside-width);
        grid-template-areas: "nav main aside";
    }
}

/* ------------------------------------------------------------------ Hauptmenü */

.main-nav__toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: 0;
    background: var(--color-primary);
    color: var(--color-on-primary);
    font: inherit;
    font-weight: bold;
    cursor: pointer;
}

.main-nav__toggle[hidden] {
    display: none;
}

.main-nav__toggle-icon,
.main-nav__toggle-icon::before,
.main-nav__toggle-icon::after {
    display: block;
    width: 1.1em;
    height: 2px;
    background: currentColor;
}

.main-nav__toggle-icon {
    position: relative;
}

.main-nav__toggle-icon::before,
.main-nav__toggle-icon::after {
    content: "";
    position: absolute;
    left: 0;
}

.main-nav__toggle-icon::before {
    top: -0.35em;
}

.main-nav__toggle-icon::after {
    top: 0.35em;
}

.main-nav__list,
.main-nav__sub {
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav__list {
    margin-top: var(--space-1);
}

.main-nav__item {
    margin: 0 0 4px;
    background: var(--color-page);
}

.main-nav__item > a {
    display: block;
    padding: 0.3em 0.75em;
    color: #333;
    text-decoration: none;
}

.main-nav__item > a:hover {
    background: var(--color-primary);
    color: var(--color-on-primary);
}

.main-nav__item.is-active {
    background: var(--color-primary);
    border-left: 4px solid var(--color-page);
}

.main-nav__item.is-active > a {
    color: var(--color-on-primary);
}

.main-nav__item > a[aria-current="page"] {
    font-weight: bold;
}

.main-nav__sub {
    padding: 0 0 2px 3px;
}

.main-nav__subitem {
    margin: 0 0 2px;
    background: var(--color-surface);
}

.main-nav__subitem > a {
    display: block;
    padding: 0.2em 0.75em 0.2em 1.5em;
    color: #333;
    text-decoration: none;
}

.main-nav__subitem > a:hover {
    text-decoration: underline;
}

.main-nav__subitem.is-active > a {
    font-weight: bold;
}

.nav-search {
    display: flex;
    gap: var(--space-1);
    margin: var(--space-5) 0 0;
}

.nav-search input[type="search"] {
    flex: 1 1 auto;
    min-width: 0;
    padding: 0.3em 0.4em;
    border: 1px solid #767676;
    font: inherit;
    font-size: var(--font-size-small);
}

.nav-search input::placeholder {
    color: #6b6b6b;
}

.nav-search button {
    flex: 0 0 auto;
    padding: 0.3em 0.6em;
    border: 1px solid var(--color-primary);
    background: var(--color-primary);
    color: var(--color-on-primary);
    font: inherit;
    font-size: var(--font-size-small);
    cursor: pointer;
}

.nav-search button:hover {
    background: var(--color-link-hover);
}

.main-nav__contact {
    margin: var(--space-3) 0 0;
    padding: var(--space-1) var(--space-3);
    background: var(--color-surface-muted);
    font-size: var(--font-size-small);
}

/* ------------------------------------------------------------------ Volumes-Spalte */

.volumes-nav {
    background: var(--color-surface-muted);
    padding: var(--space-2) var(--space-4) var(--space-3);
}

.volumes-nav__title {
    margin: var(--space-2) 0 var(--space-3);
    font-size: 1.25rem;
    color: var(--color-heading);
}

.volumes-nav__list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: var(--font-size-small);
}

@media (min-width: 30em) and (max-width: 63.99em) {
    .volumes-nav__list {
        columns: 2;
    }
}

.volumes-nav__list a {
    display: inline-block;
    padding: 0.1em 0;
    text-decoration: none;
}

.volumes-nav__list a:hover {
    text-decoration: underline;
}

.volumes-nav__list .is-active a {
    font-weight: bold;
    color: var(--color-title);
    border-left: 3px solid var(--color-primary);
    padding-left: var(--space-2);
    margin-left: calc(-1 * var(--space-2) - 3px);
}

/* ------------------------------------------------------------------ Artikel-Listen (Inhaltsverzeichnis, Suche, neueste Artikel) */

.entries {
    list-style: none;
    margin: var(--space-4) 0 var(--space-5);
    padding: 0;
}

.entry {
    margin: 0 0 var(--space-4);
}

.entry__title {
    font-family: var(--font-body);
    font-size: 1em;
    font-weight: bold;
    color: var(--color-heading);
    border: 0;
    padding: 0;
    margin: 0 0 0.2em;
    line-height: 1.35;
}

.entry__title a,
.entry__title a:visited {
    color: inherit;
    text-decoration: none;
}

.entry__title a:hover {
    text-decoration: underline;
}

.entry__authors,
.entry__meta,
.entry__comment {
    margin: 0 0 0.1em;
    color: var(--color-heading);
}

.entry__comment {
    color: var(--color-comment);
}

.filesize {
    white-space: nowrap;
}

/* ------------------------------------------------------------------ Volume-Seite */

.volume-special {
    font-family: var(--font-heading);
    color: var(--color-heading);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--space-2);
    margin-bottom: var(--space-4);
}

.volume-special__title {
    font-size: 1.3rem;
    margin: 0 0 0.2em;
}

.volume-special__dedication {
    font-style: italic;
    font-size: 1.1rem;
    margin: 0 0 0.2em;
}

.volume-special__link {
    margin: 0 0 0.2em;
}

.volume-status {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    color: var(--color-heading-light);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.15em;
}

/* Vorspann (Title page, Table of contents, Preface) und Artikelliste ohne zusätzlichen Abstand dazwischen */
.entries--front {
    margin-bottom: 0;
}

.entries--front + .entries {
    margin-top: 0;
}

/* ------------------------------------------------------------------ Abstract-Seite */

.paper__source {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--color-heading-light);
    margin: var(--space-4) 0 0;
}

.paper__title {
    margin-top: 0.2em;
}

.paper__dedication {
    font-style: italic;
}

.paper__abstract {
    hyphens: auto;
}

@media (min-width: 48em) {
    .paper__abstract {
        text-align: justify;
    }
}

.paper__links {
    margin: var(--space-3) 0 0;
}

.paper__citation {
    background: var(--color-surface-muted);
    border-left: 3px solid var(--color-primary);
    padding: var(--space-2) var(--space-3);
}

.references {
    list-style: none;
    padding: 0;
}

.references li {
    display: flex;
    gap: var(--space-2);
}

.references__index {
    flex: 0 0 auto;
    min-width: 2.5em;
    text-align: right;
}

.orcid img {
    width: 16px;
    height: 16px;
    vertical-align: -2px;
}

.back-link {
    margin-top: var(--space-6);
}

.back-link a::before {
    content: "\2039\00a0";
    content: "\2039\00a0" / "";
}

/* ------------------------------------------------------------------ Einzelne Seiten */

.periods {
    list-style: none;
    padding: 0;
}

.periods li {
    margin-bottom: 0.4em;
}

.editors {
    list-style: none;
    padding: 0;
}

.special-volume {
    margin-bottom: var(--space-5);
}

.search-form {
    margin: var(--space-5) 0;
}

.search-form label {
    display: block;
    font-weight: bold;
    margin-bottom: var(--space-1);
}

.search-form__row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.search-form input[type="search"] {
    flex: 1 1 18rem;
    max-width: 32rem;
    padding: 0.4em 0.5em;
    border: 1px solid #767676;
    font: inherit;
}

.search-form button {
    padding: 0.4em 1.2em;
    border: 1px solid var(--color-primary);
    background: var(--color-primary);
    color: var(--color-on-primary);
    font: inherit;
    cursor: pointer;
}

.search-form button:hover {
    background: var(--color-link-hover);
}

.search-form__help {
    margin-top: var(--space-1);
    font-size: var(--font-size-small);
}

/* Breite Inhalte (Tabellen, Formeln) dürfen auf dem Handy nicht das Layout sprengen */
.content table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
}

mjx-container[display="true"] {
    overflow-x: auto;
    overflow-y: hidden;
    max-width: 100%;
}

/* ------------------------------------------------------------------ Footer */

.site-footer {
    background: var(--color-primary);
    color: var(--color-on-primary);
    border-top: 5px solid var(--color-page);
    padding: var(--space-3) var(--space-3);
    font-size: var(--font-size-small);
}

.site-footer p {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-5);
    margin: 0;
}

.site-footer a,
.site-footer a:visited {
    color: var(--color-on-primary);
}

/* ------------------------------------------------------------------ Bewegung reduzieren */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
        scroll-behavior: auto !important;
    }
}

/* ------------------------------------------------------------------ Impressum */

.imprint-address {
    font-style: normal;
    margin-bottom: 1em;
}

/* ------------------------------------------------------------------ Suche: Beispielabfragen */

.search-help {
    margin: 0 0 var(--space-5);
    border: 1px solid var(--color-border);
    background: var(--color-surface-muted);
    padding: var(--space-2) var(--space-3);
}

.search-help summary {
    cursor: pointer;
    font-weight: bold;
    color: var(--color-heading);
}

.search-help[open] summary {
    margin-bottom: var(--space-3);
}

.search-help dd {
    margin-left: 0;
}

/* ------------------------------------------------------------------ Volumes-Übersicht */

.volumes-intro a {
    white-space: nowrap;
}

.volume-list {
    list-style: none;
    margin: var(--space-3) 0 var(--space-4);
    padding: 0;
}

.volume-list__item {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0 var(--space-3);
    padding: 0.3em 0;
    border-bottom: 1px solid var(--color-border);
}

.volume-list__head {
    flex: 0 0 13em;
}

.volume-list__link {
    font-weight: bold;
}

.volume-list__year {
    font-weight: normal;
}

.volume-list__special {
    flex: 1 1 18em;
    color: var(--color-heading);
}

.volume-list__status {
    margin-left: var(--space-2);
    font-size: var(--font-size-small);
    font-style: italic;
    color: var(--color-heading-light);
}