/* ==========================================================================
   DATENKERN SYSTEME GMBH — Haupt-Stylesheet
   Designsystem: kühles Ingenieurs-Blau + warmer Bernstein-Akzent
   Hinweis: Alle Kommentare in diesem Projekt sind auf Deutsch gehalten,
   da dies die Unternehmenssprache von DATENKERN ist.
   ========================================================================== */

/* ---- 1. Design-Tokens (Farben, Typografie, Abstände) ------------------- */
:root {
  /* Farbpalette: dunkles Marineblau als Leitfarbe, Bernstein als Akzent */
  --color-navy-900: #081a33;
  --color-navy-800: #0b2545;
  --color-navy-700: #13355e;
  --color-navy-600: #1c4677;
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-surface-alt: #eef1f6;
  --color-text: #1c2530;
  --color-muted: #5b6b7c;
  --color-border: #dde3ea;
  --color-accent: #ff7a1a;
  --color-accent-dark: #e0630a;
  --color-live: #2ecc71;
  --color-terminal-bg: #081a2e;
  --color-terminal-text: #7fe0a4;
  --color-terminal-amber: #ffb86b;

  /* Typografie */
  --font-display: "IBM Plex Sans Condensed", "IBM Plex Sans", Arial, sans-serif;
  --font-body: "IBM Plex Sans", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  /* Abstände / Radien */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
  --shadow-card: 0 1px 2px rgba(11, 37, 69, 0.06), 0 8px 24px rgba(11, 37, 69, 0.08);
  --max-width: 1180px;
}

/* ---- 2. Basis-Reset ------------------------------------------------------ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
  letter-spacing: -0.01em;
}
p { margin: 0 0 var(--space-2); color: var(--color-muted); }
ul { margin: 0; padding: 0; list-style: none; }
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

/* Sichtbarer Fokus-Indikator aus Gründen der Barrierefreiheit */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---- 3. Kopfzeile / Navigation ------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-navy-900);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 14px var(--space-3);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
}
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  display: grid; place-items: center;
  color: #0b2545; font-weight: 800; font-size: 0.85rem;
  font-family: var(--font-mono);
}
.brand small {
  display: block; font-family: var(--font-mono); font-weight: 400;
  font-size: 0.62rem; letter-spacing: 0.12em; color: #9db1c9; text-transform: uppercase;
}
.main-nav { display: flex; gap: var(--space-3); }
.main-nav a {
  color: #cfdaea;
  font-size: 0.92rem;
  font-weight: 500;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a[aria-current="page"] {
  color: #fff;
  border-bottom-color: var(--color-accent);
}
.header-actions { display: flex; align-items: center; gap: var(--space-2); }

/* Sprachumschalter */
.lang-switch { position: relative; }
.lang-switch-btn {
  display: flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  color: #e6edf5;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease;
}
.lang-switch-btn:hover { background: rgba(255,255,255,0.12); }
.lang-menu {
  position: absolute;
  right: 0; top: calc(100% + 8px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  min-width: 168px;
  padding: 6px;
  display: none;
  z-index: 60;
}
.lang-menu.open { display: block; }
.lang-menu button {
  width: 100%;
  display: flex; justify-content: space-between; align-items: center;
  background: none; border: none; text-align: left;
  padding: 9px 10px;
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--color-text);
  border-radius: 6px;
  cursor: pointer;
}
.lang-menu button:hover { background: var(--color-surface-alt); }
.lang-menu button[aria-pressed="true"] { color: var(--color-accent-dark); font-weight: 600; }

.nav-toggle {
  display: none;
  background: none; border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm); color: #fff; padding: 8px 10px; cursor: pointer;
}

/* ---- 4. Buttons und Formular-Elemente ----------------------------------- */
.btn {
  --btn-bg: var(--color-navy-800);
  --btn-fg: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.94rem;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--btn-bg);
  color: var(--btn-fg);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn::after {
  /* Dezenter "Ripple"-Schimmer beim Hover, kein grelles Blinken */
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 0%, rgba(255,255,255,0.18) 45%, transparent 65%);
  transform: translateX(-120%);
  transition: transform 0.55s ease;
}
.btn:hover::after { transform: translateX(120%); }
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(11,37,69,0.18); }
.btn:active { transform: translateY(0); }
.btn-primary { --btn-bg: var(--color-accent); --btn-fg: #1a1005; }
.btn-primary:hover { --btn-bg: var(--color-accent-dark); }
.btn-ghost {
  --btn-bg: transparent; --btn-fg: #fff;
  border-color: rgba(255,255,255,0.35);
}
.btn-ghost:hover { --btn-bg: rgba(255,255,255,0.08); }
.btn-outline {
  --btn-bg: transparent; --btn-fg: var(--color-navy-800);
  border-color: var(--color-border);
}
.btn-outline:hover { --btn-bg: var(--color-surface-alt); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.6; cursor: progress; }

/* Formulare: alle Felder und Buttons teilen dieselbe Breite und Höhe,
   damit sie exakt zueinander ausgerichtet sind (Grid mit fester Spalte). */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  width: 100%;
}
.field {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}
.field label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-navy-800);
}
.field input,
.field select {
  height: 48px;
  width: 100%;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}
.field input:focus, .field select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255,122,26,0.15);
  outline: none;
}
.field-row { display: flex; align-items: center; justify-content: space-between; }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: 16px; height: 16px; }
.checkbox-row label { font-size: 0.85rem; color: var(--color-muted); font-weight: 400; }
.form-hint { font-size: 0.8rem; color: var(--color-muted); }
.form-error {
  font-size: 0.82rem; color: #c0392b;
  display: none;
}
.field.has-error input { border-color: #c0392b; }
.field.has-error .form-error { display: block; }

/* ---- 5. Layout-Bausteine ------------------------------------------------ */
.section { padding: var(--space-6) 0; }
.section-alt { background: var(--color-surface); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: var(--space-2);
}
.eyebrow::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-live);
  box-shadow: 0 0 0 3px rgba(46,204,113,0.18);
}
.lead { font-size: 1.08rem; max-width: 62ch; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: var(--shadow-card);
}
.card-featured { border-color: var(--color-accent); position: relative; }
.card-tag {
  position: absolute; top: -12px; left: var(--space-3);
  background: var(--color-accent); color: #1a1005;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.06em;
  padding: 4px 10px; border-radius: 999px; text-transform: uppercase;
}
.price { font-family: var(--font-mono); font-size: 2rem; font-weight: 600; color: var(--color-navy-800); }
.price span { font-size: 0.95rem; color: var(--color-muted); font-weight: 400; }
.spec-list li {
  display: flex; justify-content: space-between; gap: var(--space-2);
  padding: 9px 0; border-bottom: 1px dashed var(--color-border);
  font-size: 0.88rem;
}
.spec-list li:last-child { border-bottom: none; }
.spec-list .k { color: var(--color-muted); }
.spec-list .v { font-family: var(--font-mono); color: var(--color-text); font-weight: 600; }

.trust-bar {
  display: flex; flex-wrap: wrap; gap: var(--space-4);
  justify-content: center;
  padding: var(--space-2) 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-muted);
}
.trust-bar strong { color: var(--color-navy-800); }

/* Terminal-Panel: das visuelle Signaturelement der Startseite —
   zeigt animierte Live-Messwerte eines Server-Belastungstests */
.terminal {
  background: var(--color-terminal-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: 0 20px 60px rgba(3,12,26,0.35);
  border: 1px solid rgba(255,255,255,0.06);
  font-family: var(--font-mono);
  color: var(--color-terminal-text);
  font-size: 0.86rem;
  overflow: hidden;
}
.terminal-bar { display: flex; align-items: center; gap: 8px; margin-bottom: var(--space-2); }
.terminal-dot { width: 10px; height: 10px; border-radius: 50%; }
.terminal-dot.r { background: #ff5f57; }
.terminal-dot.y { background: #febc2e; }
.terminal-dot.g { background: #28c840; }
.terminal-title { margin-left: 8px; color: #7f93ab; font-size: 0.78rem; }
.terminal-line { white-space: pre; opacity: 0; animation: term-in 0.4s ease forwards; }
.terminal-line b { color: var(--color-terminal-amber); }
.terminal-cursor {
  display: inline-block; width: 8px; height: 15px; background: var(--color-terminal-text);
  vertical-align: -2px; animation: blink 1s steps(1) infinite;
}
@keyframes term-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
@keyframes blink { 50% { opacity: 0; } }

/* Fortschrittsbalken innerhalb des Terminals (Belastungstest-Anzeige) */
.term-bar-track { background: rgba(255,255,255,0.08); border-radius: 4px; height: 6px; margin: 4px 0 10px; overflow: hidden; }
.term-bar-fill { height: 100%; background: linear-gradient(90deg, var(--color-terminal-text), var(--color-terminal-amber)); width: 0%; transition: width 1.4s cubic-bezier(.2,.8,.2,1); border-radius: 4px; }

/* ---- 6. Feature-Icons ---------------------------------------------------- */
.feature {
  display: flex; gap: var(--space-2); align-items: flex-start;
}
.feature-icon {
  flex: none; width: 42px; height: 42px; border-radius: 10px;
  background: var(--color-navy-800); color: var(--color-accent);
  display: grid; place-items: center; font-family: var(--font-mono); font-weight: 700;
}
.feature h3 { font-size: 1.02rem; margin-bottom: 4px; }
.feature p { font-size: 0.9rem; margin: 0; }

/* ---- 7. CTA-Band --------------------------------------------------------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-navy-900), var(--color-navy-700));
  color: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  flex-wrap: wrap;
}
.cta-band h2 { color: #fff; margin-bottom: 4px; }
.cta-band p { color: #b9c8db; margin: 0; }

/* ---- 8. Fußzeile --------------------------------------------------------- */
.site-footer { background: var(--color-navy-900); color: #b9c8db; padding: var(--space-5) 0 var(--space-3); margin-top: var(--space-6); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: var(--space-4); padding-bottom: var(--space-4); border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-grid h4 { color: #fff; font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: var(--space-2); }
.footer-grid a { display: block; color: #b9c8db; font-size: 0.88rem; padding: 5px 0; transition: color 0.15s ease; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--space-3); font-size: 0.8rem; color: #7f93ab; flex-wrap: wrap; gap: 10px; }
.footer-legal-note { font-size: 0.76rem; color: #5f7590; max-width: 60ch; }

/* ---- 9. Tabellen (Preise, Rechenzentren) --------------------------------- */
table.data-table { width: 100%; border-collapse: collapse; background: var(--color-surface); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-card); }
table.data-table th, table.data-table td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; }
table.data-table th { background: var(--color-navy-800); color: #fff; font-family: var(--font-mono); font-weight: 500; font-size: 0.78rem; letter-spacing: 0.05em; text-transform: uppercase; }
table.data-table td.mono { font-family: var(--font-mono); }
table.data-table tr:last-child td { border-bottom: none; }

/* ---- 10. Seitenkopf für Unterseiten -------------------------------------- */
.page-hero { background: var(--color-navy-900); color: #fff; padding: var(--space-5) 0 var(--space-4); }
.page-hero h1 { color: #fff; }
.page-hero p { color: #b9c8db; max-width: 62ch; }
.breadcrumb { font-family: var(--font-mono); font-size: 0.78rem; color: #7f93ab; margin-bottom: var(--space-2); }
.breadcrumb a { color: #9db1c9; }
.breadcrumb a:hover { color: #fff; }

/* ---- 11. Status-/Live-Anzeigen -------------------------------------------- */
.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 0.76rem;
  background: rgba(46,204,113,0.12); color: #1e9e59;
  padding: 5px 10px; border-radius: 999px; border: 1px solid rgba(46,204,113,0.35);
}
.status-pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--color-live); animation: pulse-dot 1.6s ease-in-out infinite; }
@keyframes pulse-dot { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* ---- 12. Responsive Anpassungen ------------------------------------------ */
@media (max-width: 960px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .main-nav { position: fixed; inset: 62px 0 auto 0; background: var(--color-navy-900); flex-direction: column; padding: var(--space-2) var(--space-3); gap: 4px; transform: translateY(-8px); opacity: 0; pointer-events: none; transition: all 0.2s ease; border-bottom: 1px solid rgba(255,255,255,0.1); }
  .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-toggle { display: inline-flex; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band { flex-direction: column; align-items: flex-start; }
}