/* ============================================================
   Stefan Baust IT GmbH — stefanbaust.de
   Brand: Attractive Blue #1C22A0 · Basic Blue #485FDE
          Seashell Blue #E0E9FF · Luxury White #FAFAFA
   ============================================================ */

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/inter-400.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/assets/fonts/inter-500.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/assets/fonts/inter-600.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url("/assets/fonts/inter-800.woff2") format("woff2");
}

:root {
  --blue-deep: #1c22a0;
  --blue: #485fde;
  --blue-soft: #e0e9ff;
  --blue-soft-50: #eef3ff;
  --white: #fafafa;
  --ink: #0b1f32;
  --ink-soft: #43536b;
  --ink-faint: #7c8aa0;
  --line: #e4e8f0;
  --radius: 14px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ink);
  text-wrap: balance;
}

a {
  color: var(--blue);
  text-decoration: none;
}
a:hover {
  color: var(--blue-deep);
}

.container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 1.25rem;
}
.container--narrow {
  max-width: 720px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 4.25rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
}
.brand:hover {
  color: var(--ink);
}
.brand svg {
  width: 2.1rem;
  height: auto;
  flex: none;
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand__name {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.01em;
}
.brand__suffix {
  font-weight: 600;
  font-size: 0.72rem;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.site-nav a {
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.95rem;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--blue-deep);
}
.site-nav .btn {
  font-size: 0.9rem;
}
.site-nav a.btn--primary {
  color: #fff;
}
.site-nav a.btn--primary:hover {
  color: #fff;
}

/* ---------- Buttons & chips ---------- */

.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.4;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn--primary {
  background: var(--blue-deep);
  color: #fff;
}
.btn--primary:hover {
  background: var(--blue);
  color: #fff;
}
.btn--ghost {
  border: 1.5px solid var(--line);
  color: var(--ink);
  background: transparent;
}
.btn--ghost:hover {
  border-color: var(--blue);
  color: var(--blue-deep);
}
.chip {
  display: inline-block;
  background: var(--blue-soft);
  color: var(--blue-deep);
  font-weight: 600;
  font-size: 0.8rem;
  padding: 0.3em 0.9em;
  border-radius: 999px;
  letter-spacing: 0.01em;
}

/* ---------- Hero ---------- */

.hero {
  padding: 5.5rem 0 4.5rem;
  background:
    radial-gradient(60rem 30rem at 85% -10%, var(--blue-soft-50), transparent 60%),
    var(--white);
}
.hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 17.5rem;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.1rem, 5.5vw, 3.4rem);
  margin: 1.1rem 0 1.25rem;
  max-width: 21ch;
}
.hero h1 em {
  font-style: normal;
  color: var(--blue-deep);
}
.hero__lead {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0 0 2.25rem;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}
.hero__portrait {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid rgba(72, 95, 222, 0.22);
  border-radius: calc(var(--radius) + 10px);
  background: var(--blue-soft);
  box-shadow: 0 18px 50px rgba(28, 34, 160, 0.11);
  transform: rotate(1.5deg);
}
.hero__portrait::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 7px solid rgba(250, 250, 250, 0.5);
  border-radius: inherit;
  pointer-events: none;
}
.hero__portrait img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center 24%;
}
@media (max-width: 780px) {
  .hero {
    padding: 4rem 0 3.5rem;
  }
  .hero__layout {
    grid-template-columns: minmax(0, 1fr) minmax(8.5rem, 12rem);
    gap: 1.5rem;
    align-items: start;
  }
}
@media (max-width: 600px) {
  .hero__layout {
    display: block;
  }
  .hero__portrait {
    width: min(72%, 17rem);
    margin: 2.75rem auto 0;
    transform: rotate(1deg);
  }
}

/* ---------- Trust bar ---------- */

.trust {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
  padding: 1.6rem 0;
}
.trust__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
}
.trust__fact {
  font-size: 0.95rem;
  color: var(--ink-soft);
}
.trust__fact strong {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- Sections ---------- */

.section {
  padding: 4.5rem 0;
}
.section--tint {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section__head {
  max-width: 640px;
  margin-bottom: 2.75rem;
}
.section__head h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin: 0.9rem 0 0.75rem;
}
.section__head p {
  color: var(--ink-soft);
  margin: 0;
}

/* ---------- Cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem 1.6rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:hover {
  border-color: var(--blue);
  box-shadow: 0 6px 24px rgba(28, 34, 160, 0.07);
}
.card h3 {
  font-size: 1.08rem;
  font-weight: 600;
  margin: 0 0 0.6rem;
}
.card p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin: 0;
}
.card__icon {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 10px;
  background: var(--blue-soft);
  color: var(--blue-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
}
.card__icon svg {
  width: 1.35rem;
  height: 1.35rem;
}
.card--link {
  display: block;
  color: inherit;
}
.card--link:hover {
  color: inherit;
}
.card__meta {
  font-size: 0.82rem;
  color: var(--ink-faint);
  margin-bottom: 0.4rem;
  display: block;
}
.card--link h3 {
  color: var(--blue-deep);
}

/* ---------- References ---------- */

.refs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}
.ref {
  border-left: 3px solid var(--blue-soft);
  padding: 0.2rem 0 0.2rem 1.1rem;
}
.ref strong {
  display: block;
  font-weight: 600;
  margin-bottom: 0.2rem;
}
.ref span {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

/* ---------- About ---------- */

.about {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3rem;
  align-items: start;
}
.about p {
  color: var(--ink-soft);
  margin-top: 0;
}
.facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}
.facts li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.8rem 1.1rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.facts li strong {
  color: var(--ink);
  font-weight: 600;
}
@media (max-width: 760px) {
  .about {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

/* ---------- Contact / CTA ---------- */

.cta {
  background: linear-gradient(135deg, var(--blue-deep), #2a35c8 55%, var(--blue));
  border-radius: calc(var(--radius) + 6px);
  color: #fff;
  padding: 3.5rem 3rem;
  text-align: center;
}
.cta h2 {
  color: #fff;
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  margin: 0 0 0.75rem;
}
.cta p {
  color: var(--blue-soft);
  max-width: 52ch;
  margin: 0 auto 2rem;
}
.cta .btn--primary {
  background: #fff;
  color: var(--blue-deep);
}
.cta .btn--primary:hover {
  background: var(--blue-soft);
  color: var(--blue-deep);
}
.cta__alt {
  margin-top: 1.4rem;
  font-size: 0.92rem;
  color: var(--blue-soft);
}
.cta__alt a {
  color: #fff;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.4);
  text-underline-offset: 3px;
}
@media (max-width: 600px) {
  .cta {
    padding: 2.5rem 1.5rem;
  }
}

/* ---------- Blog list ---------- */

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.post-list li {
  border-bottom: 1px solid var(--line);
}
.post-list li:first-child {
  border-top: 1px solid var(--line);
}
.post-link {
  display: block;
  padding: 1.5rem 0.25rem;
  color: inherit;
}
.post-link:hover {
  color: inherit;
}
.post-link:hover h3 {
  color: var(--blue-deep);
}
.post-link h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0.25rem 0 0.35rem;
  transition: color 0.15s ease;
}
.post-meta {
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.tags {
  margin-top: 0.5rem;
}
.tags .tag {
  display: inline-block;
  font-size: 0.75rem;
  background: var(--blue-soft);
  color: var(--blue-deep);
  padding: 0.15em 0.6em;
  border-radius: 4px;
  margin-right: 0.35rem;
  font-weight: 500;
}
.draft-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  background: #fde68a;
  color: #713f12;
  padding: 0.15em 0.6em;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.filter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.5rem 0 2rem;
}
.filter-nav a {
  border: 1.5px solid var(--line);
  border-radius: 999px;
  padding: 0.3rem 1rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
}
.filter-nav a:hover {
  border-color: var(--blue);
  color: var(--blue-deep);
}
.filter-nav a[aria-current="page"] {
  background: var(--blue-deep);
  border-color: var(--blue-deep);
  color: #fff;
}

/* ---------- Article / prose ---------- */

.prose {
  padding-top: 3rem;
  padding-bottom: 4rem;
}
.prose h1 {
  font-size: clamp(1.7rem, 4.5vw, 2.4rem);
  margin: 0.5rem 0 0.75rem;
}
.prose h2 {
  font-size: 1.4rem;
  margin-top: 2.5rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.3rem;
}
.prose h3 {
  font-size: 1.15rem;
  margin-top: 2rem;
}
.prose a {
  text-decoration: underline;
  text-decoration-color: var(--blue-soft);
  text-underline-offset: 2px;
}
.prose a:hover {
  text-decoration-color: var(--blue);
}
.prose img {
  max-width: 100%;
  height: auto;
  cursor: zoom-in;
  border-radius: 8px;
}
.prose ul,
.prose ol {
  padding-left: 1.5rem;
}
.prose li {
  margin-bottom: 0.35rem;
}
.prose blockquote {
  border-left: 3px solid var(--blue);
  margin: 1.5rem 0;
  padding: 0.75rem 1.25rem;
  background: var(--blue-soft-50);
  border-radius: 0 8px 8px 0;
  color: var(--ink-soft);
}
.prose blockquote p {
  margin: 0;
}
.prose table {
  border-collapse: collapse;
  width: 100%;
  display: block;
  overflow-x: auto;
  font-size: 0.92rem;
}
.prose th,
.prose td {
  border: 1px solid var(--line);
  padding: 0.5rem 0.8rem;
  text-align: left;
}
.prose th {
  background: var(--blue-soft-50);
}

/* Inline code */
code {
  font-family: "SFMono-Regular", "Menlo", "Monaco", "Consolas", monospace;
  font-size: 0.875em;
  background: #eef1f6;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: #1c22a0;
}

/* Code blocks (with or without language) */
pre,
pre[class*="language-"] {
  font-family: "SFMono-Regular", "Menlo", "Monaco", "Consolas", monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  background: #10163a;
  color: #e2e8f0;
  padding: 1.25rem 1.5rem;
  border-radius: 10px;
  overflow-x: auto;
  margin: 1.5rem 0;
  -webkit-overflow-scrolling: touch;
}
pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: inherit;
  font-size: inherit;
}

/* Syntax highlighting (Prism - dark theme) */
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #64748b; font-style: italic; }
.token.punctuation { color: #94a3b8; }
.token.property, .token.tag, .token.boolean, .token.number, .token.constant, .token.symbol { color: #f59e0b; }
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin { color: #34d399; }
.token.operator, .token.entity, .token.url { color: #94a3b8; }
.token.atrule, .token.attr-value, .token.keyword { color: #818cf8; }
.token.function, .token.class-name { color: #60a5fa; }
.token.regex, .token.important, .token.variable { color: #fbbf24; }
.token.important, .token.bold { font-weight: bold; }
.token.italic { font-style: italic; }
.token.annotation { color: #a78bfa; }
.token.namespace { color: #f472b6; opacity: 0.8; }
.token.generics { color: #67e8f9; }

/* ---------- Lightbox ---------- */

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(4, 8, 40, 0.88);
  cursor: zoom-out;
  justify-content: center;
  align-items: center;
}
.lightbox.active {
  display: flex;
}
.lightbox img {
  max-width: 95vw;
  max-height: 95vh;
  border-radius: 0;
  cursor: zoom-out;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

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

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 2.5rem 0;
  margin-top: 4rem;
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  font-size: 0.9rem;
  color: var(--ink-faint);
}
.site-footer a {
  color: var(--ink-soft);
  margin-right: 1.25rem;
}
.site-footer a:last-child {
  margin-right: 0;
}
.site-footer a:hover {
  color: var(--blue-deep);
}

/* ---------- Responsive nav ---------- */

@media (max-width: 640px) {
  .site-nav {
    gap: 1rem;
  }
  .site-nav a:not(.btn):not(.site-nav__essential) {
    display: none;
  }
  .brand__suffix {
    display: none;
  }
}