/* elmtree.ai – Blog Stylesheet
   Angelehnt an das Design-System der Hauptseite (css/style.css),
   bewusst reduziert für gute Lesbarkeit langer Artikel. */

/* --- Variables --- */
:root {
    --white: #F4F2EE;
    --black: #1E1C1A;
    --accent: #FF4466;
    --gray-light: #EBE8E3;
    --gray-text: #595652;
    --line: #DCD8D1;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --content: 72rem;
    --article: 46rem;
    --side-pad: clamp(1.25rem, 5vw, 4rem);
}

/* --- Base --- */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--black);
    background: var(--white);
    border-top: 4px solid var(--accent);
    text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; height: auto; border-radius: 2px; }
a { color: var(--black); text-decoration-color: var(--accent); text-decoration-thickness: 0.09em; text-underline-offset: 0.2em; }
a:hover { color: var(--accent); }
::selection { background: var(--accent); color: var(--white); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 1000;
    padding: 0.75rem 1rem;
    background: var(--black);
    color: var(--white);
}
.skip-link:focus { left: 0.75rem; top: 0.75rem; }

.shell, .shell--article { margin-inline: auto; padding-inline: var(--side-pad); }
.shell { max-width: calc(var(--content) + 2 * var(--side-pad)); }
.shell--article { max-width: calc(var(--article) + 2 * var(--side-pad)); }

/* --- Header --- */
.site-header { border-bottom: 2px solid var(--black); }
.site-header__inner {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    padding-block: 1.5rem;
}
.brand {
    display: inline-flex;
    align-items: baseline;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.75rem;
    letter-spacing: -0.04em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--black);
}
.brand:hover { color: var(--black); }
.brand .dot {
    display: inline-block;
    width: 9px;
    height: 9px;
    margin-left: 2px;
    background: var(--accent);
    border-radius: 50%;
}
.site-nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.75rem; }
.site-nav a {
    font-family: var(--font-heading);
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    text-decoration: none;
    color: var(--black);
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent); }

/* --- Typografie --- */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--black);
    line-height: 1.15;
    letter-spacing: -0.02em;
    text-wrap: balance;
}
h1 { margin: 0 0 1.5rem; font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.08; }
h2 { margin: 3rem 0 1rem; font-size: clamp(1.45rem, 3vw, 1.9rem); }
h3 { margin: 2.25rem 0 0.65rem; font-size: 1.2rem; }
h4 { margin: 1.75rem 0 0.5rem; font-size: 1.05rem; }
p { margin: 0 0 1.15rem; }
ul, ol { margin: 0 0 1.15rem; padding-left: 1.4rem; }
li { margin-bottom: 0.35rem; }
strong { font-weight: 500; }

/* --- Hero --- */
.hero { padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(2.5rem, 5vw, 4rem); border-bottom: 2px solid var(--black); }
.eyebrow, .series-kicker {
    margin: 0 0 1.5rem;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.8125rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.16em;
}
.hero--index h1 {
    text-transform: uppercase;
    font-weight: 800;
    font-size: clamp(2.6rem, 7vw, 5.25rem);
    line-height: 0.95;
    letter-spacing: -0.03em;
}
.series-note { margin: 0 0 1.75rem; font-size: 0.9375rem; color: var(--gray-text); max-width: 60ch; }
.lead {
    margin: 0;
    font-weight: 500;
    font-size: clamp(1.15rem, 2vw, 1.35rem);
    line-height: 1.55;
    border-left: 4px solid var(--accent);
    padding-left: clamp(1.25rem, 3vw, 2rem);
    max-width: 62ch;
}
.meta {
    margin-top: 1.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.75rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--gray-text);
}

/* --- Artikel --- */
.article-body { padding: clamp(2.5rem, 6vw, 4.5rem) 0 5rem; }
.article-body code {
    padding: 0.1em 0.35em;
    background: var(--gray-light);
    border-radius: 2px;
    font-size: 0.875em;
}
blockquote {
    margin: 2.25rem 0;
    padding: 0.25rem 0 0.25rem 1.5rem;
    border-left: 4px solid var(--accent);
    font-weight: 500;
    font-size: 1.15rem;
    line-height: 1.55;
}
blockquote p { margin: 0; }

/* --- Boxen --- */
.summary-box, .legal-note, .warning, .example-box {
    margin: 2.25rem 0;
    padding: 1.5rem 1.75rem;
    background: var(--gray-light);
    border-radius: 2px;
}
.summary-box { background: transparent; border: 2px solid var(--black); }
.legal-note { border-left: 4px solid var(--black); }
.warning { border-left: 4px solid var(--accent); }
.summary-box h2, .legal-note h3, .warning h3, .example-box h3, .source-box h2 {
    margin-top: 0;
    font-size: 0.9375rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 800;
}
.summary-box ul, .legal-note ul, .warning ul, .example-box ul,
.summary-box p:last-child, .legal-note p:last-child, .warning p:last-child { margin-bottom: 0; }
.example-box pre {
    margin: 1rem 0 0;
    padding: 1.25rem;
    overflow-x: auto;
    background: var(--black);
    color: var(--white);
    border-radius: 2px;
    font-size: 0.85rem;
    line-height: 1.55;
}
.example-box pre code { padding: 0; background: transparent; color: inherit; }
.source-box { margin-top: 4rem; padding-top: 1.75rem; border-top: 2px solid var(--black); font-size: 0.9375rem; color: var(--gray-text); }
.source-box ol { padding-left: 1.2rem; }
.source-box li { margin-bottom: 0.55rem; }
.source-box a { color: var(--gray-text); }
.source-box a:hover { color: var(--accent); }
.source-box .source-status { font-style: italic; }

/* --- Tabellen --- */
.table-wrap { margin: 2.25rem 0; overflow-x: auto; border: 2px solid var(--black); border-radius: 2px; }
table { width: 100%; border-collapse: collapse; min-width: 40rem; font-size: 0.9375rem; }
caption {
    padding: 0.9rem 1.25rem;
    text-align: left;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-bottom: 1px solid var(--line);
}
th, td { padding: 0.8rem 1.25rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-bottom: 2px solid var(--black);
}
tr:last-child td { border-bottom: 0; }
.status-done { background: var(--gray-light) !important; }

/* --- Listen-Bausteine --- */
.checklist { margin: 1.25rem 0 2rem; padding: 0; list-style: none; }
.checklist li { position: relative; margin: 0.6rem 0; padding-left: 1.9rem; }
.checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    font-family: var(--font-heading);
    font-weight: 800;
    color: var(--accent);
}

.steps { margin: 2.25rem 0; padding: 0; list-style: none; counter-reset: step; }
.steps > li { position: relative; margin: 0 0 2rem; padding-left: 3.75rem; counter-increment: step; }
.steps > li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0.1rem;
    width: 2.4rem;
    height: 2.4rem;
    display: grid;
    place-items: center;
    border: 2px solid var(--black);
    border-radius: 2px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.05rem;
}
.steps h3 { margin: 0 0 0.5rem; }
.steps p:last-child, .steps ul:last-child { margin-bottom: 0; }

/* --- Index / Übersicht --- */
.index-main { padding: 3rem 0 5rem; }
.section-intro { max-width: 62ch; }
.series-section { margin-top: 4.5rem; padding-top: 3rem; border-top: 2px solid var(--black); }

.kpi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin: 2.5rem 0 0; }
.kpi { border-top: 2px solid var(--black); padding-top: 1rem; }
.kpi strong {
    display: block;
    margin-bottom: 0.25rem;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.6rem;
    letter-spacing: -0.02em;
    text-transform: uppercase;
}
.kpi span { color: var(--gray-text); font-size: 0.9375rem; }

.card-grid, .principle-grid, .idea-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem 1.5rem; margin: 2rem 0; }
.principle-grid, .idea-grid { grid-template-columns: repeat(2, 1fr); }
.card, .principle, .idea-card { display: flex; flex-direction: column; border-top: 2px solid var(--black); padding-top: 1.1rem; }
.card--wide { grid-column: span 2; }
.card__number {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.16em;
}
.card h2, .card h3 { margin: 0.55rem 0 0.6rem; font-size: 1.2rem; }
.principle h3, .idea-card h3 { margin: 0.55rem 0 0.6rem; font-size: 1.2rem; }
.card p, .principle p, .idea-card p { margin: 0 0 1rem; font-size: 0.9375rem; color: var(--gray-text); }
.card .card__link {
    margin-top: auto;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    text-decoration: none;
}
.card .card__link::after { content: " →"; }
.idea-card .priority {
    display: inline-block;
    margin-bottom: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
}

.glossary { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin: 2rem 0; padding: 0; }
.glossary div { border-left: 2px solid var(--black); padding-left: 1.25rem; }
.glossary dt {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.glossary dd { margin: 0.35rem 0 0; font-size: 0.9375rem; color: var(--gray-text); }

/* --- Artikel-Navigation --- */
.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin: 4rem 0 0; }
.article-nav a { display: block; border-top: 2px solid var(--black); padding-top: 1rem; text-decoration: none; }
.article-nav a:last-child { text-align: right; }
.article-nav small {
    display: block;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--gray-text);
}
.article-nav strong { display: block; margin-top: 0.35rem; font-weight: 500; line-height: 1.4; }
.article-nav a:hover strong { color: var(--accent); }
.article-nav .empty { visibility: hidden; }

/* --- CTA --- */
.cta {
    margin: 4rem 0 0;
    padding: clamp(2.5rem, 6vw, 4rem) clamp(1.5rem, 4vw, 3rem);
    background: var(--black);
    color: var(--white);
    border-radius: 2px;
    text-align: center;
}
.cta h2 {
    margin: 0 0 0.75rem;
    color: var(--white);
    text-transform: uppercase;
    font-weight: 800;
    font-size: clamp(1.4rem, 3vw, 1.9rem);
    letter-spacing: -0.02em;
}
.cta p { margin: 0.5rem auto 1.75rem; max-width: 54ch; color: rgba(244, 242, 238, 0.75); }
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.25rem;
    padding: 1rem 1.75rem;
    background: var(--white);
    color: var(--black);
    border: 2px solid var(--white);
    border-radius: 2px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    text-align: center;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.button:hover { background: var(--accent); border-color: var(--accent); color: var(--white); }

/* --- Footer --- */
.site-footer { margin-top: 0; padding: 2.5rem 0; background: var(--black); color: var(--white); }
.site-footer__inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem 2rem;
}
.site-footer p { margin: 0; font-size: 0.8125rem; color: rgba(244, 242, 238, 0.6); letter-spacing: 0.02em; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.site-footer a { color: var(--white); opacity: 0.8; text-decoration: none; font-size: 0.875rem; transition: opacity 0.2s; }
.site-footer a:hover { opacity: 1; }

/* --- Responsive --- */
@media (max-width: 900px) {
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .card--wide { grid-column: span 2; }
}
@media (max-width: 640px) {
    body { font-size: 1rem; }
    .site-header__inner { flex-direction: column; align-items: flex-start; padding-block: 1.1rem; }
    .kpi-grid, .card-grid, .principle-grid, .idea-grid, .glossary { grid-template-columns: 1fr; }
    .card--wide { grid-column: auto; }
    .article-nav { grid-template-columns: 1fr; }
    .article-nav a:last-child { text-align: left; }
    .lead { padding-left: 1.1rem; }
    .steps > li { padding-left: 3.25rem; }
}

/* --- Print --- */
@media print {
    .site-header, .site-footer, .cta, .article-nav, .skip-link { display: none !important; }
    body { background: white; color: black; font-size: 11pt; border-top: 0; }
    .hero { padding: 0 0 1.5rem; border-bottom: 1px solid black; }
    .article-body { padding-top: 1rem; }
    a { color: black; text-decoration: none; }
    a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 8pt; word-break: break-all; }
    .summary-box, .legal-note, .warning, .example-box, .source-box, .steps > li { break-inside: avoid; }
}