/* =============================================================
   hartleb.consulting — Trusted Advisor & Sparringspartner
   Design-System
   Farben: #2E75B6 (Akzentblau), #1A1A2E (Text), #FFFFFF, #F6F8FB
   Schrift: Inter (Google Fonts)
   ============================================================= */

:root {
  --color-accent: #2E75B6;
  --color-accent-dark: #1F5689;
  --color-text: #1A1A2E;
  --color-text-soft: #4A4A5E;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F6F8FB;
  --color-bg-deep: #1A1A2E;
  --color-line: #E4E8EE;

  --container: 1180px;
  --radius: 14px;
  --shadow-soft: 0 8px 30px rgba(26, 26, 46, 0.06);
  --shadow-strong: 0 18px 50px rgba(26, 26, 46, 0.12);

  --space-xs: .5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
}

/* --- Reset & Basics --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-accent-dark); }

h1, h2, h3, h4 {
  color: var(--color-text);
  line-height: 1.2;
  font-weight: 700;
  margin: 0 0 .5em 0;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.025em; }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); margin-top: 0; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em 0; color: var(--color-text-soft); }
p.lead { font-size: 1.15rem; color: var(--color-text); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --- Header / Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-line);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  max-width: var(--container);
  margin: 0 auto;
}
.brand {
  display: flex;
  flex-direction: column;
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.1;
  color: var(--color-text);
}
.brand small {
  font-weight: 400;
  font-size: .75rem;
  color: var(--color-accent);
  letter-spacing: .04em;
  text-transform: uppercase;
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  font-size: 1.4rem;
  color: var(--color-text);
  cursor: pointer;
}
.nav {
  display: flex;
  gap: 1.6rem;
  align-items: center;
}
.nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: .95rem;
  position: relative;
}
.nav a.active::after,
.nav a:hover::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -6px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.nav .btn { padding: .55rem 1.1rem; }

/* --- Language switch DE/EN --- */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  margin-left: .4rem;
  padding-left: .8rem;
  border-left: 1px solid var(--color-line);
  font-size: .8rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.lang-switch a {
  color: var(--color-text-soft);
  font-weight: 500;
  text-decoration: none;
  padding: .15rem .25rem;
}
.lang-switch a:hover { color: var(--color-text); }
.lang-switch a.active {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.lang-switch a.active::after,
.lang-switch a:hover::after { display: none; }
.lang-switch .sep { color: var(--color-line); }

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: .9rem 1.6rem;
  font-weight: 600;
  font-size: .98rem;
  border-radius: 999px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all .2s ease;
  text-align: center;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(46, 117, 182, 0.25);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(46, 117, 182, 0.35);
}
.btn-ghost {
  border-color: var(--color-line);
  color: var(--color-text);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.btn-light {
  background: #fff;
  color: var(--color-text);
}
.btn-light:hover { color: var(--color-accent); }

/* --- Sections --- */
section { padding: var(--space-xl) 0; }
section.tight { padding: var(--space-lg) 0; }
.section-bg-soft { background: var(--color-bg-soft); }
.section-bg-dark {
  background: var(--color-bg-deep);
  color: #fff;
}
.section-bg-dark h1, .section-bg-dark h2, .section-bg-dark h3 { color: #fff; }
.section-bg-dark p { color: rgba(255,255,255,0.75); }

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: .8rem;
}
.section-head { max-width: 760px; margin-bottom: 3rem; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* --- Hero --- */
.hero {
  padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 8vw, 6rem);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(46,117,182,0.08), transparent 55%),
    radial-gradient(circle at 10% 90%, rgba(26,26,46,0.05), transparent 50%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 3.5rem;
  align-items: center;
  position: relative;
}
.hero h1 strong { color: var(--color-accent); }
.hero p.subline {
  font-size: 1.18rem;
  color: var(--color-text-soft);
  max-width: 560px;
  margin-bottom: 2rem;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.hero-meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  color: var(--color-text-soft);
  font-size: .92rem;
}
.hero-meta span { display: flex; align-items: center; gap: .4rem; }
.hero-meta strong { color: var(--color-text); font-weight: 700; font-size: 1.4rem; line-height: 1; }

.hero-photo {
  position: relative;
  aspect-ratio: 4 / 5;
  background:
    linear-gradient(135deg, rgba(46,117,182,0.15), rgba(26,26,46,0.85)),
    var(--color-bg-deep);
  border-radius: var(--radius);
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  box-shadow: var(--shadow-strong);
  color: rgba(255,255,255,0.85);
  font-size: .85rem;
}
.hero-photo .photo-note {
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
  padding: .7rem 1rem;
  border-radius: 8px;
  font-style: italic;
}

/* --- Cards (Leistungsfelder, Stimmen, Impulse) --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all .25s ease;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
  border-color: rgba(46,117,182,0.4);
}
.card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(46,117,182,0.1);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
}
.card h3 { margin-bottom: .6rem; }
.card .card-link {
  margin-top: auto;
  font-weight: 600;
  font-size: .95rem;
}
.card .card-link::after {
  content: ' →';
  transition: transform .2s ease;
  display: inline-block;
}
.card:hover .card-link::after { transform: translateX(3px); }

/* --- Network Strip --- */
.network {
  background: var(--color-bg-soft);
  padding: 2.5rem 0;
  text-align: center;
}
.network .label {
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--color-text-soft);
  margin-bottom: 1.2rem;
  font-weight: 600;
}
.network-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2.5rem;
  align-items: center;
}
.network-list a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 1rem;
}
.network-list a small {
  display: block;
  font-weight: 400;
  font-size: .8rem;
  color: var(--color-text-soft);
}

/* --- Two-column blocks --- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.split.media-right { grid-template-columns: 1fr 1fr; }
.split .media {
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(135deg, rgba(46,117,182,0.12), rgba(26,26,46,0.5)),
    var(--color-bg-deep);
  border-radius: var(--radius);
  display: flex;
  align-items: flex-end;
  padding: 1.2rem;
  color: rgba(255,255,255,0.75);
  font-size: .8rem;
  font-style: italic;
}

/* --- Quote / Testimonial --- */
.quote {
  background: #fff;
  border-left: 4px solid var(--color-accent);
  padding: 2rem 2.2rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow-soft);
  font-size: 1.08rem;
  line-height: 1.7;
}
.quote p { font-style: italic; color: var(--color-text); }
.quote cite {
  display: block;
  margin-top: 1rem;
  font-style: normal;
  font-size: .92rem;
  color: var(--color-text-soft);
  font-weight: 500;
}
.quote-list { display: grid; gap: 1.5rem; }

/* Blog-Datum: maschinenlesbar via datetime, visuell ausgeblendet */
.article-date {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Testimonial mit Foto */
.testimonial-with-photo {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.4rem;
  align-items: start;
}
.testimonial-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}
@media (max-width: 640px) {
  .testimonial-with-photo {
    grid-template-columns: 1fr;
  }
  .testimonial-photo { width: 64px; height: 64px; }
}

/* --- Process / Numbered list --- */
.process {
  display: grid;
  gap: 2rem;
  counter-reset: step;
}
.process .step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 1.5rem;
  align-items: start;
}
.process .step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}
.process .step h3 { margin-bottom: .3rem; }

/* --- CTA banner --- */
.cta-banner {
  background: var(--color-bg-deep);
  color: #fff;
  border-radius: var(--radius);
  padding: clamp(2rem, 5vw, 3.5rem);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
}
.cta-banner h2 { color: #fff; margin: 0 0 .4rem 0; }
.cta-banner p { color: rgba(255,255,255,0.75); margin: 0; }

/* --- Footer --- */
.site-footer {
  background: var(--color-bg-deep);
  color: rgba(255,255,255,0.7);
  padding: 4rem 0 2rem;
  font-size: .92rem;
}
.site-footer h4 { color: #fff; font-size: .95rem; margin-bottom: .9rem; }
.site-footer a { color: rgba(255,255,255,0.7); }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: .5rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: .82rem;
  color: rgba(255,255,255,0.5);
}

/* --- Page hero (für Unterseiten) --- */
.page-hero {
  padding: clamp(3rem, 7vw, 5rem) 0 clamp(2rem, 5vw, 3rem);
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-line);
}
.page-hero h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
.page-hero p { font-size: 1.1rem; max-width: 680px; }

/* --- Audience block (für Zusammenarbeit) --- */
.audience {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.audience .card {
  padding: 2.5rem;
}
.audience .card h2 { font-size: 1.5rem; }

/* --- Blog/Impulse list --- */
.post-list { display: grid; gap: 1rem; }
.post-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: all .2s ease;
}
.post-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-soft);
}
.post-card .post-image {
  aspect-ratio: 4 / 3;
  background-color: var(--color-bg-deep);
  background-size: cover;
  background-position: center;
  border-radius: 8px;
}
.post-card h3 { margin-bottom: .4rem; }
.post-meta {
  font-size: .82rem;
  color: var(--color-text-soft);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: .4rem;
  font-weight: 600;
}
.post-meta .tag {
  display: inline-block;
  background: rgba(46,117,182,0.1);
  color: var(--color-accent);
  padding: .2rem .6rem;
  border-radius: 999px;
  margin-right: .4rem;
}

/* --- Tag list --- */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 2rem;
}
.tag-list a {
  background: #fff;
  border: 1px solid var(--color-line);
  padding: .4rem 1rem;
  border-radius: 999px;
  font-size: .9rem;
  color: var(--color-text);
  font-weight: 500;
}
.tag-list a:hover, .tag-list a.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* --- Contact form --- */
.contact-form {
  display: grid;
  gap: 1rem;
  max-width: 560px;
}
.contact-form label {
  font-weight: 500;
  font-size: .92rem;
  display: block;
  margin-bottom: .3rem;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: .85rem 1rem;
  border: 1.5px solid var(--color-line);
  border-radius: 10px;
  font: inherit;
  background: #fff;
  color: var(--color-text);
  transition: border-color .2s ease;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 0;
  border-color: var(--color-accent);
}
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form .checkbox {
  display: flex;
  gap: .6rem;
  align-items: flex-start;
  font-size: .88rem;
}
.contact-form .checkbox input { width: auto; margin-top: .2rem; }

/* --- Highlight box --- */
.highlight {
  background: linear-gradient(135deg, rgba(46,117,182,0.08), rgba(46,117,182,0.02));
  border-left: 4px solid var(--color-accent);
  padding: 1.5rem 1.8rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 2rem 0;
}
.highlight p:last-child { margin-bottom: 0; }

/* --- Responsive --- */
@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-photo { aspect-ratio: 4 / 3; }
  .split { grid-template-columns: 1fr; gap: 2rem; }
  .audience { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-banner { grid-template-columns: 1fr; text-align: left; }
  .post-card { grid-template-columns: 1fr; }
  .post-card .post-image { aspect-ratio: 16 / 9; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-soft);
    gap: .8rem;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: .4rem 0; }
  .nav .btn { text-align: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
  .hero-meta { gap: 1rem; }
  section { padding: 4rem 0; }
}

/* === Blog-Artikel === */
.blog-article .article {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.25rem;
  font-size: 1.08rem;
  line-height: 1.75;
}
.blog-article .article h2 { font-size: 1.5rem; margin-top: 2.5rem; }
.blog-article .article p { color: var(--color-text); margin-bottom: 1.2em; }
.blog-article .article p.lead { font-size: 1.22rem; line-height: 1.55; color: var(--color-text); }
.blog-article .article p.pull-quote {
  font-size: 1.4rem;
  line-height: 1.4;
  font-weight: 600;
  color: var(--color-accent);
  border-left: 4px solid var(--color-accent);
  padding: .5rem 0 .5rem 1.5rem;
  margin: 2.5rem 0;
}
.blog-article .article .scene {
  background: var(--color-bg-soft);
  padding: 1.5rem 1.8rem;
  border-radius: var(--radius);
  margin: 2rem 0;
  font-style: italic;
  color: var(--color-text-soft);
}
.blog-article .article .signature {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-line);
  font-style: italic;
  color: var(--color-text-soft);
}
.blog-article .article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  font-size: .9rem;
  color: var(--color-text-soft);
  margin-bottom: 1.5rem;
}
.blog-article .tag-chip {
  display: inline-block;
  background: rgba(46,117,182,0.1);
  color: var(--color-accent);
  padding: .25rem .75rem;
  border-radius: 999px;
  font-weight: 600;
}
.blog-article .back-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 1.5rem;
}
.blog-article .back-link::before { content: '← '; }