/* ══════════════════════════════════════════════════
   SBA Base Stylesheet — smart.business.atelier
   Stand: März 2026
   ══════════════════════════════════════════════════ */

:root {
  /* Farben */
  --sba-heading:     #3D6789;
  --sba-text:        #556B7A;
  --sba-link:        #0000FF;
  --sba-link-hover:  #3D6789;
  --sba-bg:          #FFFFFF;
  --sba-bg-alt:      #F5F7F9;
  --sba-cta:         #2B5C8A;
  --sba-cta-hover:   #1E4A6F;
  --sba-cta-text:    #FFFFFF;
  --sba-border:      #C8D6E0;
  --sba-footer-bg:   #2C3E50;
  --sba-footer-text: #B0C4D8;
  --sba-meta:        #7A8A96;

  /* Typografie */
  --sba-font:        Arial, Helvetica, sans-serif;
  --sba-h1:          34px;
  --sba-h2:          28px;
  --sba-h3:          18px;
  --sba-body:        14px;
  --sba-small:       12px;
  --sba-lh:          1.787;

  /* Layout */
  --sba-max-width:   1120px;
  --sba-padding-x:   44px;
  --sba-section-py:  56px;
  --sba-radius:      8px;
}

/* Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* Basis */
html { scroll-behavior: smooth; }

body {
  font-family: var(--sba-font);
  font-size: var(--sba-body);
  line-height: var(--sba-lh);
  color: var(--sba-text);
  background: var(--sba-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.sba-container {
  max-width: var(--sba-max-width);
  margin: 0 auto;
  padding: 0 var(--sba-padding-x);
}

/* Überschriften */
h1, h2, h3 {
  font-family: var(--sba-font);
  font-weight: 400;
  color: var(--sba-heading);
}
h1 { font-size: var(--sba-h1); line-height: 1.795; margin-bottom: 24px; }
h2 { font-size: var(--sba-h2); line-height: 1.787; margin-bottom: 16px; }
h3 { font-size: var(--sba-h3); line-height: 1.779; margin-bottom: 10px; }

/* Fließtext */
p { margin-bottom: 12px; }
p strong { color: var(--sba-text); }

/* Links */
a { color: var(--sba-link); text-decoration: underline; transition: color 0.2s; }
a:hover { color: var(--sba-link-hover); }
a:focus-visible { outline: 3px solid var(--sba-heading); outline-offset: 2px; }

/* Sections */
.sba-section { padding: var(--sba-section-py) 0; }
.sba-section-alt { background: var(--sba-bg-alt); }

/* Buttons */
.sba-btn {
  display: inline-block;
  font-family: var(--sba-font);
  font-size: 16px;
  font-weight: 700;
  padding: 14px 32px;
  border: none;
  border-radius: var(--sba-radius);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s ease;
}
.sba-btn-primary {
  background: var(--sba-cta);
  color: var(--sba-cta-text);
}
.sba-btn-primary:hover { background: var(--sba-cta-hover); color: var(--sba-cta-text); text-decoration: none; }
.sba-btn-primary:focus-visible { outline: 3px solid var(--sba-heading); outline-offset: 2px; }

.sba-btn-secondary {
  background: transparent;
  color: var(--sba-cta);
  border: 2px solid var(--sba-cta);
}
.sba-btn-secondary:hover { background: var(--sba-bg-alt); color: var(--sba-cta); text-decoration: none; }

/* Cards */
.sba-card {
  background: var(--sba-bg);
  border: 1px solid var(--sba-border);
  border-radius: var(--sba-radius);
  padding: 24px;
  transition: box-shadow 0.2s ease;
}
.sba-card:hover { box-shadow: 0 4px 12px rgba(61, 103, 137, 0.12); }
.sba-card h3 { margin-top: 0; }

/* Leistungs-Grid */
.sba-grid {
  display: grid;
  gap: 24px;
}
.sba-grid-3 { grid-template-columns: repeat(3, 1fr); }
.sba-grid-2 { grid-template-columns: repeat(2, 1fr); }

/* Footer */
.sba-footer {
  background: var(--sba-footer-bg);
  color: var(--sba-footer-text);
  padding: 32px 0;
  font-size: var(--sba-body);
}
.sba-footer a { color: var(--sba-footer-text); text-decoration: underline; }
.sba-footer a:hover { color: #FFFFFF; }

/* Trennlinie */
hr { border: none; border-top: 1px solid var(--sba-border); margin: 32px 0; }

/* Listen */
ul { padding-left: 24px; margin-bottom: 12px; }
li { margin-bottom: 6px; }

/* Responsive */
@media (max-width: 1023px) {
  :root {
    --sba-padding-x: 32px;
    --sba-section-py: 40px;
  }
  .sba-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  :root {
    --sba-padding-x: 24px;
    --sba-section-py: 32px;
    --sba-h1: 28px;
    --sba-h2: 22px;
    --sba-h3: 16px;
  }
  .sba-grid-3,
  .sba-grid-2 { grid-template-columns: 1fr; }
}