/*
Theme Name: ISIG Minimal
Description: Eigenständiges, responsives Wissenschafts- und Publikationstheme für ISIG – Interactive Society / Interaktive Gesellschaft. Mit Startseitenmodulen, Beitragskarten, Autoren- und Publikationsdarstellung sowie optionaler Easy-Digital-Downloads-Unterstützung.
Version: 1.0.2
Author: ISIG / bifop Verlag
Requires at least: 6.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: isig-minimal
Tags: blog, education, news, one-column, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready, wide-blocks
*/

:root {
    --isig-ink: #142832;
    --isig-ink-soft: #34505b;
    --isig-paper: #f4f2ec;
    --isig-surface: #ffffff;
    --isig-teal: #1d6d75;
    --isig-teal-dark: #15535a;
    --isig-teal-light: #dcebed;
    --isig-copper: #c6653b;
    --isig-line: #d8dfdf;
    --isig-muted: #65747a;
    --isig-radius: 18px;
    --isig-shadow: 0 18px 50px rgba(20, 40, 50, .10);
    --isig-content: 760px;
    --isig-wide: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--isig-ink);
    background: var(--isig-paper);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 18px;
    line-height: 1.68;
    text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; }
a { color: var(--isig-teal-dark); text-decoration-thickness: .08em; text-underline-offset: .18em; }
a:hover { color: var(--isig-copper); }
button, input, select, textarea { font: inherit; }
button, input[type="submit"] { cursor: pointer; }

h1, h2, h3, h4, h5, h6 {
    color: var(--isig-ink);
    font-family: Georgia, "Times New Roman", serif;
    line-height: 1.15;
    margin: 0 0 .7em;
    text-wrap: balance;
}
h1 { font-size: clamp(2.45rem, 5.5vw, 5rem); letter-spacing: -.045em; }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); letter-spacing: -.035em; }
h3 { font-size: clamp(1.35rem, 2.4vw, 1.8rem); letter-spacing: -.02em; }
p { margin: 0 0 1.25em; }
blockquote {
    margin: 2.2rem 0;
    padding: .25rem 0 .25rem 1.5rem;
    border-left: 4px solid var(--isig-copper);
    color: var(--isig-ink-soft);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.2em;
}
hr { border: 0; border-top: 1px solid var(--isig-line); margin: 3rem 0; }

.screen-reader-text {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0);
    white-space: nowrap; border: 0;
}
.screen-reader-text:focus {
    clip: auto !important;
    width: auto; height: auto;
    left: 12px; top: 12px;
    padding: 12px 16px;
    color: #fff; background: var(--isig-ink);
    z-index: 100000;
}
:focus-visible { outline: 3px solid var(--isig-copper); outline-offset: 3px; }

.isig-container { width: min(calc(100% - 40px), var(--isig-wide)); margin-inline: auto; }
.isig-content-width { width: min(calc(100% - 40px), var(--isig-content)); margin-inline: auto; }
.site-main { min-height: 55vh; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(244, 242, 236, .94);
    border-bottom: 1px solid rgba(20, 40, 50, .10);
    backdrop-filter: blur(14px);
}
.admin-bar .site-header { top: 32px; }
.header-inner {
    min-height: 84px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}
.site-branding { display: flex; align-items: center; min-width: 0; }
.custom-logo-link { display: inline-flex; align-items: center; }
.custom-logo { max-height: 58px; width: auto; }
.site-title { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: 1.55rem; line-height: 1; }
.site-title a { color: var(--isig-ink); text-decoration: none; }
.site-description { margin: .38rem 0 0; color: var(--isig-muted); font-size: .76rem; letter-spacing: .12em; text-transform: uppercase; }
.header-tools { display: flex; align-items: center; gap: 16px; margin-left: auto; }
.bifop-return-desktop { flex: 0 0 auto; }
.bifop-return-mobile { display: none; }
.bifop-return-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 46px;
    padding: 10px 17px;
    border: 1px solid rgba(20,40,50,.18);
    border-radius: 999px;
    color: #fff;
    background: var(--isig-ink);
    box-shadow: 0 8px 24px rgba(20,40,50,.14);
    text-decoration: none;
    font-size: .78rem;
    font-weight: 850;
    line-height: 1.2;
    white-space: nowrap;
    transition: transform .2s ease, color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.bifop-return-button:hover {
    color: #fff;
    background: var(--isig-copper);
    border-color: var(--isig-copper);
    box-shadow: 0 12px 28px rgba(20,40,50,.19);
    transform: translateY(-1px);
}
.bifop-return-icon {
    display: inline-grid;
    place-items: center;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    color: var(--isig-ink);
    background: #fff;
    font-size: 1rem;
    line-height: 1;
    transition: transform .2s ease;
}
.bifop-return-button:hover .bifop-return-icon { transform: translateX(-2px); }

.primary-navigation ul { display: flex; align-items: center; gap: 8px; list-style: none; margin: 0; padding: 0; }
.primary-navigation li { position: relative; }
.primary-navigation a {
    display: block;
    padding: 10px 12px;
    color: var(--isig-ink);
    border-radius: 999px;
    text-decoration: none;
    font-size: .88rem;
    font-weight: 700;
}
.primary-navigation a:hover,
.primary-navigation .current-menu-item > a,
.primary-navigation .current_page_item > a { color: #fff; background: var(--isig-teal); }
.primary-navigation .sub-menu {
    position: absolute;
    top: calc(100% + 8px); left: 0;
    min-width: 230px;
    display: none;
    padding: 10px;
    background: #fff;
    border: 1px solid var(--isig-line);
    border-radius: 14px;
    box-shadow: var(--isig-shadow);
}
.primary-navigation li:hover > .sub-menu,
.primary-navigation li:focus-within > .sub-menu { display: block; }
.primary-navigation .sub-menu a { border-radius: 8px; }
.menu-toggle {
    display: none;
    width: 46px; height: 46px;
    border: 1px solid var(--isig-line);
    border-radius: 50%;
    color: var(--isig-ink);
    background: transparent;
}
.menu-toggle-lines, .menu-toggle-lines::before, .menu-toggle-lines::after {
    display: block; width: 20px; height: 2px; background: currentColor; content: ""; margin: auto; transition: .2s ease;
}
.menu-toggle-lines::before { transform: translateY(-6px); }
.menu-toggle-lines::after { transform: translateY(4px); }

.isig-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(72px, 10vw, 140px) 0 clamp(64px, 9vw, 120px);
    background:
        radial-gradient(circle at 78% 24%, rgba(29,109,117,.17), transparent 34%),
        radial-gradient(circle at 15% 80%, rgba(198,101,59,.10), transparent 28%),
        var(--isig-paper);
}
.isig-hero::after {
    content: "";
    position: absolute;
    right: -12vw; bottom: -25vw;
    width: 55vw; height: 55vw;
    border: 1px solid rgba(29,109,117,.15);
    border-radius: 50%;
    box-shadow: 0 0 0 7vw rgba(29,109,117,.035), 0 0 0 14vw rgba(29,109,117,.025);
    pointer-events: none;
}
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(300px, .7fr); gap: clamp(44px, 8vw, 110px); align-items: center; }
.eyebrow { margin: 0 0 1.1rem; color: var(--isig-teal-dark); font-size: .78rem; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.hero-title { max-width: 850px; }
.hero-copy { max-width: 720px; color: var(--isig-ink-soft); font-size: clamp(1.08rem, 1.8vw, 1.34rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 2rem; }
.isig-button, .wp-element-button, .edd-submit.button, .edd-submit, input[type="submit"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 22px;
    border: 2px solid var(--isig-teal);
    border-radius: 999px;
    color: #fff;
    background: var(--isig-teal);
    text-decoration: none;
    font-size: .9rem;
    font-weight: 800;
    line-height: 1.2;
    transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.isig-button:hover, .wp-element-button:hover, .edd-submit:hover, input[type="submit"]:hover { color: #fff; background: var(--isig-teal-dark); border-color: var(--isig-teal-dark); transform: translateY(-1px); }
.isig-button--ghost { color: var(--isig-ink); background: transparent; border-color: rgba(20,40,50,.35); }
.isig-button--ghost:hover { color: #fff; background: var(--isig-ink); border-color: var(--isig-ink); }

.hero-orbit {
    position: relative;
    aspect-ratio: 1;
    width: min(100%, 430px);
    margin-inline: auto;
    border: 1px solid rgba(29,109,117,.34);
    border-radius: 50%;
}
.hero-orbit::before, .hero-orbit::after { content: ""; position: absolute; border: 1px solid rgba(29,109,117,.24); border-radius: 50%; }
.hero-orbit::before { inset: 14%; }
.hero-orbit::after { inset: 31%; background: rgba(255,255,255,.62); }
.orbit-core {
    position: absolute; inset: 38%; z-index: 2;
    display: grid; place-items: center;
    color: #fff; background: var(--isig-ink);
    border-radius: 50%;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.2rem, 3vw, 2rem);
    box-shadow: 0 0 0 12px rgba(255,255,255,.68);
}
.orbit-node {
    position: absolute;
    display: grid; place-items: center;
    width: 96px; height: 96px;
    border-radius: 50%;
    color: var(--isig-ink);
    background: #fff;
    border: 1px solid var(--isig-line);
    box-shadow: 0 12px 34px rgba(20,40,50,.10);
    font-size: .69rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase;
}
.orbit-node--human { left: -4%; top: 44%; }
.orbit-node--machine { right: -3%; top: 14%; }
.orbit-node--media { right: 6%; bottom: 3%; }

.isig-section { padding: clamp(70px, 9vw, 120px) 0; }
.isig-section--white { background: #fff; }
.isig-section--ink { color: #fff; background: var(--isig-ink); }
.isig-section--ink h2, .isig-section--ink h3 { color: #fff; }
.section-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, .6fr); gap: 40px; align-items: end; margin-bottom: 44px; }
.section-heading p { margin: 0; color: var(--isig-muted); }
.isig-section--ink .section-heading p { color: #c7d3d7; }

.editorial-intro { display: grid; grid-template-columns: minmax(0, .75fr) minmax(0, 1.25fr); gap: clamp(40px, 8vw, 110px); align-items: start; }
.intro-mark { font-family: Georgia, "Times New Roman", serif; color: var(--isig-copper); font-size: 6rem; line-height: .65; }
.intro-copy { font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.35rem, 2.4vw, 2rem); line-height: 1.42; }
.front-page-content { margin-top: 2rem; }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 24px; }
.isig-card {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    overflow: hidden;
    background: var(--isig-surface);
    border: 1px solid var(--isig-line);
    border-radius: var(--isig-radius);
    transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.isig-card:hover { transform: translateY(-4px); box-shadow: var(--isig-shadow); border-color: rgba(29,109,117,.35); }
.card-media { display: block; aspect-ratio: 16/9; overflow: hidden; background: var(--isig-teal-light); }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.isig-card:hover .card-media img { transform: scale(1.025); }
.card-placeholder { position: relative; display: grid; place-items: center; width: 100%; height: 100%; overflow: hidden; }
.card-placeholder::before, .card-placeholder::after { content: ""; position: absolute; border: 1px solid rgba(29,109,117,.28); border-radius: 50%; }
.card-placeholder::before { width: 70%; height: 70%; }
.card-placeholder::after { width: 38%; height: 38%; background: rgba(255,255,255,.35); }
.card-placeholder span { position: relative; z-index: 2; font-family: Georgia, "Times New Roman", serif; font-size: 1.5rem; }
.card-body { display: flex; flex: 1; flex-direction: column; padding: 26px; }
.card-kicker { margin-bottom: 12px; color: var(--isig-teal-dark); font-size: .7rem; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
.card-title { font-size: 1.5rem; }
.card-title a { color: var(--isig-ink); text-decoration: none; }
.card-title a:hover { color: var(--isig-teal-dark); }
.card-excerpt { color: var(--isig-ink-soft); font-size: .94rem; }
.card-footer { margin-top: auto; padding-top: 18px; border-top: 1px solid var(--isig-line); color: var(--isig-muted); font-size: .76rem; }

.topic-grid { display: flex; flex-wrap: wrap; gap: 12px; }
.topic-link { display: inline-flex; align-items: center; gap: 10px; padding: 13px 18px; border: 1px solid rgba(255,255,255,.24); border-radius: 999px; color: #fff; text-decoration: none; }
.topic-link:hover { color: var(--isig-ink); background: #fff; }
.topic-count { display: inline-grid; place-items: center; min-width: 27px; height: 27px; padding-inline: 7px; border-radius: 99px; background: rgba(255,255,255,.15); font-size: .72rem; font-weight: 800; }
.topic-link:hover .topic-count { background: var(--isig-teal-light); }

.cta-panel { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; padding: clamp(34px, 6vw, 68px); border-radius: 28px; background: var(--isig-teal-light); }
.cta-panel p { max-width: 760px; margin-bottom: 0; color: var(--isig-ink-soft); }

.page-header { padding: clamp(62px, 8vw, 105px) 0 46px; }
.page-header .archive-description { max-width: 760px; color: var(--isig-ink-soft); }
.content-shell { padding-bottom: clamp(72px, 10vw, 130px); }
.entry-article { width: min(calc(100% - 40px), var(--isig-content)); margin-inline: auto; }
.entry-header { margin-bottom: 36px; }
.entry-title { font-size: clamp(2.3rem, 5vw, 4.6rem); }
.entry-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--isig-muted); font-size: .78rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
.entry-featured { width: min(calc(100% - 40px), 1060px); margin: 0 auto 48px; }
.entry-featured img { width: 100%; border-radius: 22px; box-shadow: var(--isig-shadow); }
.entry-content > * { max-width: var(--isig-content); margin-left: auto; margin-right: auto; }
.entry-content > .alignwide { max-width: var(--isig-wide); }
.entry-content > .alignfull { max-width: none; width: 100vw; margin-left: calc(50% - 50vw); }
.entry-content ul, .entry-content ol { padding-left: 1.3em; }
.entry-content table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.entry-content th, .entry-content td { padding: 12px 14px; border: 1px solid var(--isig-line); text-align: left; }
.entry-content th { background: var(--isig-teal-light); }
.entry-footer { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--isig-line); color: var(--isig-muted); font-size: .85rem; }

.publication-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, 360px); gap: 48px; align-items: start; }
.publication-cover img { width: 100%; border-radius: 14px; box-shadow: var(--isig-shadow); }
.publication-meta { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; margin: 28px 0; }
.publication-meta-item { padding: 14px 16px; border: 1px solid var(--isig-line); border-radius: 12px; background: #fff; }
.publication-meta-label { display: block; color: var(--isig-muted); font-size: .68rem; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.publication-meta-value { display: block; margin-top: 4px; font-weight: 700; }
.purchase-box { padding: 24px; border-radius: var(--isig-radius); background: var(--isig-teal-light); }
.purchase-box h2 { font-size: 1.55rem; }

.search-form { display: flex; gap: 8px; max-width: 620px; }
.search-field, input[type="text"], input[type="email"], input[type="url"], input[type="search"], textarea, select {
    width: 100%;
    min-height: 48px;
    padding: 11px 14px;
    color: var(--isig-ink);
    background: #fff;
    border: 1px solid #aebbbf;
    border-radius: 10px;
}
textarea { min-height: 150px; }
.search-submit { flex: 0 0 auto; }

.navigation.pagination { margin-top: 48px; }
.nav-links { display: flex; flex-wrap: wrap; gap: 8px; }
.page-numbers { display: inline-grid; place-items: center; min-width: 42px; height: 42px; padding: 0 12px; border: 1px solid var(--isig-line); border-radius: 999px; text-decoration: none; }
.page-numbers.current { color: #fff; background: var(--isig-teal); border-color: var(--isig-teal); }
.post-navigation { margin-top: 60px; padding-top: 28px; border-top: 1px solid var(--isig-line); }
.post-navigation .nav-links { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.post-navigation .nav-next { text-align: right; }

.comments-area { width: min(calc(100% - 40px), var(--isig-content)); margin: 70px auto 0; }
.comment-list { list-style: none; padding: 0; }
.comment-list .children { list-style: none; }
.comment-body { margin-bottom: 22px; padding: 22px; border: 1px solid var(--isig-line); border-radius: 14px; background: #fff; }
.comment-meta { font-size: .8rem; }

.site-footer { padding: 42px 0 28px; color: #d7e1e4; background: #0d1d24; }
.publisher-bridge {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 36px;
    margin: 0 0 58px;
    padding: clamp(25px, 4vw, 38px);
    border: 1px solid rgba(255,255,255,.13);
    border-radius: 22px;
    background: linear-gradient(135deg, rgba(29,109,117,.52), rgba(20,40,50,.62));
    box-shadow: 0 18px 44px rgba(0,0,0,.18);
}
.publisher-bridge p { margin: 0; color: #cbd9dc; }
.publisher-bridge-kicker {
    margin-bottom: 5px !important;
    color: #fff !important;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.2rem, 2.3vw, 1.65rem);
    font-weight: 700;
    line-height: 1.2;
}
.bifop-return-button--footer {
    min-height: 52px;
    padding: 13px 22px;
    color: var(--isig-ink);
    background: #fff;
    border-color: #fff;
    box-shadow: none;
    font-size: .88rem;
}
.bifop-return-button--footer .bifop-return-icon { color: #fff; background: var(--isig-copper); }
.bifop-return-button--footer:hover { color: #fff; background: var(--isig-copper); border-color: var(--isig-copper); }
.bifop-return-button--footer:hover .bifop-return-icon { color: var(--isig-copper); background: #fff; }

.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 48px; }
.site-footer h2, .site-footer h3 { color: #fff; }
.footer-brand { max-width: 500px; }
.footer-title { font-size: 2rem; }
.footer-text { color: #afc1c7; }
.footer-menu { list-style: none; margin: 0; padding: 0; }
.footer-menu li + li { margin-top: 8px; }
.site-footer a { color: #e7f0f2; }
.site-footer a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; margin-top: 52px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.13); color: #9fb1b7; font-size: .78rem; }

.edd_downloads_list { display: grid !important; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 24px; }
.edd_download { width: auto !important; margin: 0 !important; padding: 24px !important; border: 1px solid var(--isig-line); border-radius: var(--isig-radius); background: #fff; }
.edd_download_title { font-family: Georgia, "Times New Roman", serif; font-size: 1.45rem; }
.edd_price { font-weight: 800; }
.edd_purchase_submit_wrapper { margin-top: 18px; }
.edd-cart, #edd_checkout_cart { width: 100%; border-collapse: collapse; background: #fff; }
#edd_checkout_cart th, #edd_checkout_cart td { padding: 12px; border: 1px solid var(--isig-line); }

.no-results { padding: 40px; border: 1px solid var(--isig-line); border-radius: var(--isig-radius); background: #fff; }

@media (max-width: 980px) {
    .header-tools { margin-left: 0; }
    .bifop-return-desktop { display: none; }
    .bifop-return-mobile { display: block; margin-top: 14px; padding-top: 16px; border-top: 1px solid var(--isig-line); }
    .bifop-return-button--mobile { width: 100%; min-height: 50px; }
    .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
    .primary-navigation { position: absolute; top: 100%; left: 0; right: 0; display: none; padding: 14px 20px 24px; background: var(--isig-paper); border-bottom: 1px solid var(--isig-line); }
    .primary-navigation.is-open { display: block; }
    .primary-navigation ul { display: block; }
    .primary-navigation a { padding: 12px; }
    .primary-navigation .sub-menu { position: static; display: block; min-width: 0; padding: 0 0 0 18px; background: transparent; border: 0; box-shadow: none; }
    .hero-grid, .section-heading, .editorial-intro, .publication-hero { grid-template-columns: 1fr; }
    .hero-orbit { max-width: 360px; }
    .card-grid, .edd_downloads_list { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .publisher-bridge { grid-template-columns: 1fr; }
    .bifop-return-button--footer { justify-self: start; }
}

@media (max-width: 700px) {
    body { font-size: 17px; }
    .admin-bar .site-header { top: 46px; }
    .header-inner { min-height: 72px; }
    .site-description { display: none; }
    .hero-grid { gap: 54px; }
    .hero-orbit { max-width: 290px; }
    .orbit-node { width: 76px; height: 76px; font-size: .58rem; }
    .card-grid, .edd_downloads_list, .footer-grid, .publication-meta { grid-template-columns: 1fr; }
    .cta-panel { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; }
    .publisher-bridge { gap: 22px; margin-bottom: 44px; }
    .bifop-return-button--footer { width: 100%; }
    .post-navigation .nav-links { grid-template-columns: 1fr; }
    .post-navigation .nav-next { text-align: left; }
    .search-form { flex-direction: column; }
    .search-submit { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}