/* ==========================================================================
   AVALON EDV Consulting GmbH – Stylesheet
   Reines CSS3, keine Frameworks, keine externen Abhängigkeiten.
   Schriftart: System-Font-Stack (kein Google Fonts-Request -> DSGVO-konform,
   keine externe Verbindung, keine Ladezeit-Kosten).
   ========================================================================== */

:root {
  /* Farbpalette – abgeleitet aus dem AVALON-Logo */
  --color-gray-900: #333335;
  --color-gray-800: #414143;
  --color-gray-700: #58595b;   /* Logo-Grau */
  --color-gray-500: #7c7d7f;
  --color-gray-300: #b7b8ba;
  --color-gray-200: #dcdde0;
  --color-gray-100: #f2f3f4;
  --color-gray-50:  #fafafa;
  --color-white:    #ffffff;

  --color-yellow: #f5a623;  /* Dreieck */
  --color-orange: #ea5b35;  /* Kreis */
  --color-blue:   #2aabe2;  /* Quadrat */
  --color-blue-dark: #1c85b3;

  --color-text: var(--color-gray-800);
  --color-heading: var(--color-gray-900);
  --color-bg: var(--color-white);
  --color-bg-alt: var(--color-gray-100);
  --color-border: var(--color-gray-200);
  --color-link: var(--color-blue-dark);
  --color-focus: var(--color-blue);

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --container-width: 1180px;
  --radius: 4px;
  --shadow-sm: 0 1px 3px rgba(51, 51, 53, 0.08);
  --shadow-md: 0 6px 24px rgba(51, 51, 53, 0.10);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
}

/* --------------------------------------------------------------------
   Reset & Basics
   -------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-base);
  font-size: 16px;
  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-link); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

ul, ol { padding-left: 1.25em; }

h1, h2, h3, h4 {
  color: var(--color-heading);
  line-height: 1.25;
  margin: 0 0 var(--space-2);
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }
p  { margin: 0 0 var(--space-2); }

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

section { padding: var(--space-5) 0; }
.section-alt { background: var(--color-bg-alt); }

.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;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-blue);
  color: #fff;
  padding: 0.75em 1.25em;
  z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

/* --------------------------------------------------------------------
   Bauhaus-Formen (dekorativ, wiederkehrendes Gestaltungselement)
   -------------------------------------------------------------------- */
.shape { position: absolute; pointer-events: none; z-index: 0; }
.shape-triangle {
  width: 0; height: 0;
  border-left: 34px solid transparent;
  border-right: 34px solid transparent;
  border-bottom: 58px solid var(--color-yellow);
  opacity: 0.9;
}
.shape-circle {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--color-orange);
}
.shape-square {
  width: 46px; height: 46px;
  background: var(--color-blue);
}

/* --------------------------------------------------------------------
   Header / Navigation
   -------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 0.6rem 0;
}

.brand { display: flex; align-items: center; }
.brand img { height: 58px; width: auto; }

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-list {
  list-style: none;
  display: flex;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.nav-list a {
  color: var(--color-gray-800);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.4em 0.1em;
  border-bottom: 2px solid transparent;
}
.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--color-blue-dark);
  border-bottom-color: var(--color-blue);
  text-decoration: none;
}

.lang-switch {
  display: flex;
  gap: 0.4em;
  font-size: 0.85rem;
  font-weight: 700;
  align-items: center;
}
.lang-switch a {
  color: var(--color-gray-500);
  padding: 0.15em 0.35em;
  border-radius: var(--radius);
}
.lang-switch a[aria-current="true"] {
  color: var(--color-white);
  background: var(--color-gray-700);
  text-decoration: none;
}
.lang-switch a:hover { text-decoration: underline; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.4em 0.6em;
  cursor: pointer;
}
.nav-toggle .bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-gray-800);
  margin: 4px 0;
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-2) var(--space-3) var(--space-3);
    gap: var(--space-2);
    display: none;
    box-shadow: var(--shadow-md);
  }
  .main-nav.is-open { display: flex; }
  .nav-list { flex-direction: column; gap: 0.25em; width: 100%; }
  .nav-list a { display: block; padding: 0.6em 0; }
}

/* --------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-700) 100%);
  color: var(--color-white);
  padding: var(--space-6) 0;
}
.hero .container { position: relative; z-index: 1; }
.hero-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-yellow);
  margin-bottom: var(--space-1);
}
.hero h1 { color: var(--color-white); max-width: 22ch; }
.hero p.lead {
  font-size: 1.15rem;
  max-width: 55ch;
  color: var(--color-gray-200);
}
.hero .shape-triangle { top: 12%; right: 22%; transform: rotate(8deg); }
.hero .shape-circle { top: 55%; right: 8%; }
.hero .shape-square { bottom: 10%; right: 30%; transform: rotate(-6deg); }

.page-hero {
  position: relative;
  overflow: hidden;
  background: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--space-5) 0;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { color: var(--color-white); }
.page-hero p.lead { color: var(--color-gray-200); max-width: 60ch; font-size: 1.1rem; }
.page-hero .shape-circle { top: -20px; right: 12%; opacity: 0.85; }
.page-hero .shape-square { bottom: -14px; right: 26%; opacity: 0.85; }

/* --------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-weight: 700;
  font-size: 0.98rem;
  padding: 0.85em 1.6em;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--color-blue);
  color: var(--color-white);
}
.btn-primary:hover { background: var(--color-blue-dark); }
.btn-outline {
  background: transparent;
  border-color: currentColor;
  color: var(--color-white);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); }
.btn-dark {
  background: var(--color-gray-900);
  color: var(--color-white);
}
.btn-dark:hover { background: var(--color-gray-700); }

/* --------------------------------------------------------------------
   Service Cards / Grids
   -------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: var(--space-3);
}
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.card h3 { margin-bottom: 0.5em; }
.card p { color: var(--color-gray-700); flex-grow: 1; }
.card .card-link { font-weight: 700; margin-top: var(--space-1); }

.icon-mark {
  width: 48px; height: 48px;
  margin-bottom: var(--space-2);
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
}
.icon-mark.yellow { background: rgba(245, 166, 35, 0.15); }
.icon-mark.orange { background: rgba(234, 91, 53, 0.15); }
.icon-mark.blue   { background: rgba(42, 171, 226, 0.15); }
.icon-mark.gray   { background: var(--color-gray-100); }
.icon-mark svg { width: 26px; height: 26px; }

/* Section heading with small kicker */
.section-head { max-width: 68ch; margin-bottom: var(--space-4); }
.kicker {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-blue-dark);
  margin-bottom: 0.5em;
}

/* Feature list with checkmarks */
.check-list { list-style: none; padding: 0; margin: 0; }
.check-list li {
  position: relative;
  padding: 0.4em 0 0.4em 1.8em;
  border-bottom: 1px solid var(--color-border);
}
.check-list li:last-child { border-bottom: none; }
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.75em;
  width: 10px; height: 10px;
  background: var(--color-orange);
}

/* Two-column content/media block */
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-4);
  align-items: start;
}
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
}
.split-panel {
  background: var(--color-gray-100);
  border-left: 4px solid var(--color-blue);
  padding: var(--space-3);
  border-radius: var(--radius);
}
.split-panel.orange { border-left-color: var(--color-orange); }
.split-panel.yellow { border-left-color: var(--color-yellow); }

/* CTA band */
.cta-band {
  background: var(--color-gray-900);
  color: var(--color-white);
  text-align: center;
  padding: var(--space-5) 0;
  position: relative;
  overflow: hidden;
}
.cta-band h2 { color: var(--color-white); }
.cta-band p { color: var(--color-gray-200); max-width: 55ch; margin-left: auto; margin-right: auto; }
.cta-band .shape-triangle { top: -10px; left: 6%; opacity: 0.5; }
.cta-band .shape-circle { bottom: -20px; right: 10%; opacity: 0.5; }

/* --------------------------------------------------------------------
   Tables (Backup-Strategien Vergleich etc.)
   -------------------------------------------------------------------- */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-3) 0;
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 0.75em 1em;
  border-bottom: 1px solid var(--color-border);
}
thead th {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
  font-weight: 700;
}

/* --------------------------------------------------------------------
   Forms (Kontaktformular)
   -------------------------------------------------------------------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}
@media (max-width: 620px) {
  .form-grid { grid-template-columns: 1fr; }
}
.form-field { display: flex; flex-direction: column; gap: 0.35em; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-weight: 600; font-size: 0.92rem; }
.form-field .required { color: var(--color-orange); }
.form-field input,
.form-field textarea,
.form-field select {
  font: inherit;
  padding: 0.7em 0.8em;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  background: var(--color-white);
  color: var(--color-text);
}
.form-field textarea { resize: vertical; min-height: 140px; }

/* Honeypot-Feld gegen Spam-Bots: für Menschen unsichtbar, für Bots aber im DOM auffindbar */
.hp-field {
  position: absolute;
  left: -9999px;
  top: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.form-check {
  display: flex;
  align-items: flex-start;
  gap: 0.6em;
  font-size: 0.9rem;
  color: var(--color-gray-700);
}
.form-check input { margin-top: 0.3em; }

.form-status {
  margin-top: var(--space-2);
  padding: 0.9em 1.1em;
  border-radius: var(--radius);
  font-size: 0.95rem;
  display: none;
}
.form-status.is-visible { display: block; }
.form-status.ok { background: rgba(42,171,226,0.12); border: 1px solid var(--color-blue); }
.form-status.error { background: rgba(234,91,53,0.12); border: 1px solid var(--color-orange); }

.contact-info-list { list-style: none; margin: 0; padding: 0; }
.contact-info-list li {
  display: flex;
  gap: 0.75em;
  padding: 0.6em 0;
  border-bottom: 1px solid var(--color-border);
}
.contact-info-list li:last-child { border-bottom: none; }
.contact-info-list .label { color: var(--color-gray-500); min-width: 6.5em; font-weight: 600; }

.map-placeholder {
  background: var(--color-gray-100);
  border: 1px dashed var(--color-gray-300);
  border-radius: var(--radius);
  padding: var(--space-4);
  text-align: center;
  color: var(--color-gray-500);
}

/* --------------------------------------------------------------------
   Legal pages (Impressum / Datenschutz)
   -------------------------------------------------------------------- */
.legal h2 { margin-top: var(--space-4); }
.legal h2:first-of-type { margin-top: 0; }
.legal address { font-style: normal; }
.legal .placeholder {
  background: rgba(245, 166, 35, 0.15);
  border: 1px dashed var(--color-yellow);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-size: 0.92em;
}

/* --------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------- */
.site-footer {
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--space-5) 0 var(--space-3);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
@media (max-width: 700px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.site-footer h4 {
  color: var(--color-white);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}
.site-footer a { color: var(--color-gray-300); }
.site-footer a:hover { color: var(--color-white); }
.footer-brand img {
  height: 52px;
  margin-bottom: var(--space-2);
  background: var(--color-white);
  padding: 0.7em 1em;
  border-radius: var(--radius);
}
.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin-bottom: 0.5em; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-3);
  font-size: 0.85rem;
  color: var(--color-gray-500);
}
.footer-bottom nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-3);
  margin: 0; padding: 0;
}

/* --------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.stack > * + * { margin-top: var(--space-2); }