:root {
    --page-bg: #eef5f8;
    --page-bg-soft: #f7fbfd;
    --surface: #ffffff;
    --surface-soft: #f4f9fb;
    --text: #132232;
    --muted: #5f7183;
    --border: #dbe7ef;
    --accent: #35b6d2;
    --accent-dark: #14647a;
    --orange: #d89136;
    --navy: #102638;
    --shadow: 0 18px 48px rgba(19, 34, 50, 0.10);
    --soft-shadow: 0 10px 28px rgba(19, 34, 50, 0.07);
}

* { box-sizing: border-box; }

html { min-height: 100%; background: #edf4f8; }

body {
    position: relative;
    margin: 0;
    min-height: 100%;
    background: #edf4f8;
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.65;
}

body:before {
    content: "";
    position: fixed;
    z-index: 0;
    top: 0;
    left: 0;
    right: 0;
    height: 130vh;
    pointer-events: none;
    background:
        radial-gradient(circle at 12% 0%, rgba(53, 182, 210, 0.18), transparent 420px),
        linear-gradient(140deg, #0f2233 0%, #18364d 68%, var(--page-bg) 68.1%, #edf4f8 100%);
}

a { color: var(--accent-dark); text-decoration-thickness: 0.08em; text-underline-offset: 0.18em; }
a:hover { color: #0f4f62; text-decoration: none; }
a:focus, button:focus, input:focus { outline: 3px solid rgba(53, 182, 210, 0.35); outline-offset: 2px; }

.site-shell {
    position: relative;
    z-index: 1;
    width: 1120px;
    max-width: calc(100% - 36px);
    margin: 0 auto;
    padding: 32px 0;
}

.site-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 28px;
    align-items: center;
    padding: 28px;
    border: 1px solid rgba(255,255,255,0.26);
    border-radius: 28px;
    background:
        radial-gradient(circle at 90% 0%, rgba(53, 182, 210, 0.22), transparent 300px),
        linear-gradient(135deg, #122b40 0%, #193b56 62%, #10293d 100%);
    box-shadow:
        0 24px 64px rgba(6, 16, 26, 0.30),
        0 0 0 1px rgba(255,255,255,0.08) inset;
}

.hero-copy {
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.eyebrow {
    color: var(--orange);
    font-weight: 850;
    text-transform: uppercase;
    letter-spacing: 0.13em;
    font-size: 13px;
    margin-bottom: 14px;
}

.brand {
    display: block;
    max-width: 760px;
    color: #ffffff;
    font-size: 54px;
    line-height: 1;
    font-weight: 850;
    letter-spacing: -0.06em;
    text-decoration: none;
}

.brand:hover { color: #ffffff; opacity: 0.92; }

.tagline {
    margin: 12px 0 0;
    max-width: 650px;
    color: #d7e7ef;
    font-size: 17px;
    line-height: 1.45;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin: 18px 0 0;
}

.main-nav a,
.topic-nav a,
.secondary-link {
    display: inline-flex;
    align-items: center;
    border: 1px solid rgba(255,255,255,0.24);
    border-radius: 999px;
    padding: 8px 13px;
    color: #ffffff;
    background: rgba(255,255,255,0.10);
    text-decoration: none;
    font-weight: 750;
}

.main-nav a:hover {
    border-color: rgba(255,255,255,0.34);
    color: #ffffff;
    background: rgba(255,255,255,0.17);
}
.secondary-link:hover {
    border-color: rgba(53, 182, 210, 0.48);
    color: var(--accent-dark);
    background: #f2fafc;
}

.main-nav a[aria-current="page"] {
    border-color: var(--accent);
    color: #06202b;
    background: var(--accent);
    box-shadow: 0 8px 18px rgba(53, 182, 210, 0.18);
}

.hero-aside {
    display: grid;
    gap: 16px;
    align-content: center;
}

.site-search,
.blog-callout {
    border: 1px solid var(--border);
    border-radius: 24px;
    background: var(--surface);
    box-shadow: var(--soft-shadow);
}

.site-search {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 9px;
    padding: 16px;
    border-color: rgba(255,255,255,0.18);
    background: rgba(255,255,255,0.12);
    box-shadow: 0 14px 34px rgba(0,0,0,0.16);
}

.site-search:before {
    display: none;
    content: "";
}

.site-search:after {
    content: "Publikation, Themen, Jahr";
    grid-column: 1 / -1;
    display: block;
    margin: -2px 0 0;
    color: #d7e7ef;
    font-size: 13px;
}

.site-search input {
    min-width: 0;
    width: 100%;
    border: 0;
    border-radius: 12px;
    padding: 11px 13px;
    font: inherit;
    background: #ffffff;
    color: var(--text);
}

.site-search button,
.button,
button,
.blog-callout-link {
    border: 0;
    border-radius: 12px;
    padding: 11px 15px;
    font: inherit;
    font-weight: 850;
    color: #06202b;
    background: var(--accent);
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 8px 18px rgba(53, 182, 210, 0.18);
}
.site-search button:hover,
.button:hover,
button:hover,
.blog-callout-link:hover { background: #62c8dd; color: #06202b; }

.blog-callout {
    display: block;
    padding: 22px;
}
.blog-callout-kicker {
    margin: 0 0 7px !important;
    color: var(--orange);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.blog-callout h2 {
    margin: 0 0 8px;
    color: var(--text);
    font-size: 26px;
    line-height: 1.08;
}
.blog-callout p { margin: 0 0 14px; color: var(--muted); }
.blog-callout-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 11px 15px;
}

.site-blog-callout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 20px;
    align-items: center;
    margin-top: 16px;
    padding: 18px 22px;
}
.site-blog-callout h2 { font-size: 24px; }
.site-blog-callout p { margin-bottom: 0; }

.layout {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
    margin-top: 20px;
}

.sidebar,
.content {
    border: 1px solid var(--border);
    border-radius: 24px;
    background: var(--surface);
    box-shadow: var(--soft-shadow);
}

.sidebar {
    padding: 24px;
    position: sticky;
    top: 18px;
}
.sidebar h2 {
    margin: 0 0 16px;
    font-size: 26px;
    line-height: 1.08;
    color: var(--text);
    letter-spacing: -0.04em;
}
.topic-nav { display: grid; gap: 8px; }
.topic-nav a {
    justify-content: flex-start;
    border-color: transparent;
    color: var(--accent-dark);
    background: #eaf7fb;
    font-size: 14px;
}
.topic-nav a:hover { background: #d8f1f7; color: var(--accent-dark); }
.topic-nav a[aria-current="page"] { background: var(--accent); color: #06202b; }

.content {
    width: auto;
    min-width: 0;
    padding: 34px;
}

.content > *:first-child { margin-top: 0; }
.content p { margin: 0 0 1rem; }
.content img { max-width: 100%; height: auto; }

.start-content {
    font-size: 17px;
    line-height: 1.7;
}

h1 {
    margin: 0 0 1rem;
    color: var(--text);
    font-size: 44px;
    line-height: 1.05;
    letter-spacing: -0.052em;
}
h2, h3 { color: var(--text); line-height: 1.18; letter-spacing: -0.025em; }

.publications { width: 100%; border-collapse: collapse; }
.publications th,
.publications td { padding: 10px; border-bottom: 1px solid var(--border); vertical-align: top; text-align: left; }
.publications th { color: var(--muted); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.04em; }

.document-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 22px;
}
.document-card {
    display: grid;
    gap: 10px;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: linear-gradient(180deg, #fff, #f9fcfd);
    box-shadow: 0 12px 30px rgba(6,16,26,0.07);
}
.document-card h2 { margin: 0; font-size: 24px; line-height: 1.12; }
.document-meta { color: var(--muted); font-weight: 750; font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; }
.document-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.lead { font-size: 19px; color: #334250; }
.breadcrumb { margin-bottom: 18px; color: var(--muted); font-size: 0.95rem; }

.secondary-link {
    border-color: var(--border);
    color: var(--text);
    background: #fff;
    border-radius: 14px;
}
.secondary-link:hover { color: var(--text); background: var(--surface-soft); }

.site-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
    margin-top: 24px;
    padding: 22px 4px 10px;
    color: #597082;
    font-size: 0.95rem;
}
.site-footer p { margin: 0; }
.site-footer a { color: #315f7a; }

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

textarea { width: 100%; min-height: 220px; }
input, textarea, select { font: inherit; }

@media (max-width: 940px) {
    .site-shell { max-width: calc(100% - 24px); padding: 18px 0 28px; }
    .site-header { grid-template-columns: 1fr; gap: 24px; padding: 28px; }
    .site-blog-callout { grid-template-columns: 1fr; align-items: start; }
    .site-blog-callout .blog-callout-link { justify-self: start; }
    .brand { font-size: 50px; }
    .tagline { font-size: 17px; }
    .hero-aside { align-content: stretch; }
    .layout { grid-template-columns: 1fr; margin-top: 18px; }
    .sidebar { position: static; }
    .topic-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .content { padding: 24px; }
    .document-list { grid-template-columns: 1fr; }
    .site-footer { display: block; }
}

@media (max-width: 560px) {
    .site-shell { max-width: calc(100% - 18px); padding-top: 10px; }
    .site-header { padding: 20px; border-radius: 22px; }
    .site-search { grid-template-columns: 1fr; padding: 18px; }
    .blog-callout { padding: 18px; }
    .brand { font-size: 38px; letter-spacing: -0.055em; }
    .eyebrow { font-size: 12px; letter-spacing: 0.10em; }
    .main-nav { gap: 8px; }
    .main-nav a { padding: 8px 12px; }
    .topic-nav { grid-template-columns: 1fr; }
    h1 { font-size: 34px; }
    .sidebar h2 { font-size: 24px; }
    .publications, .publications thead, .publications tbody, .publications th, .publications td, .publications tr { display: block; }
    .publications th { display: none; }
    .publications tr { padding: 12px 0; border-bottom: 1px solid var(--border); }
    .publications td { border: 0; padding: 4px 0; }
}