/* ==========================================================================
   LuMa IT – zentrales Stylesheet
   Enthält: CSS-Variablen (Theme), Reset, Layout-Grundgerüst,
   wiederverwendbare Komponenten und Responsive-Anpassungen.
   ========================================================================== */

/* --- Theme-Variablen -----------------------------------------------------
   Zentrale Stellschrauben für Farben, Abstände und Typografie.
   Anpassungen am Erscheinungsbild sollten möglichst hier erfolgen. */
:root {
  /* Farben – Dark Theme mit Blau/Violett-Akzent */
  --color-bg: #0b0e14;
  --color-bg-alt: #10131c;
  --color-surface: #151926;
  --color-surface-hover: #1b2032;
  --color-border: rgba(255, 255, 255, 0.09);
  --color-border-strong: rgba(255, 255, 255, 0.16);

  --color-text: #e9ecf5;
  --color-text-muted: #9aa3b8;
  --color-text-faint: #6b7386;

  --color-accent: #5b8cff;
  --color-accent-2: #8b6bff;
  --color-accent-contrast: #ffffff;
  --gradient-accent: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));

  --color-focus: #8fb2ff;

  /* Typografie */
  --font-base: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --fs-base: 1rem;

  /* Abstände */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  --space-8: 6rem;

  /* Layout */
  --container-width: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --header-height: 76px;

  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.35);
  --transition-fast: 160ms ease;
  --transition-base: 240ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-base);
  font-size: var(--fs-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4, p {
  margin: 0 0 var(--space-3);
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.2rem); }
h3 { font-size: 1.2rem; }

button {
  font-family: inherit;
}

/* Fokus-Stile für Tastaturbedienung – wichtig für Barrierefreiheit */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  z-index: 1000;
}

.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
}

/* --- Layout-Helfer ---------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.section {
  padding-block: var(--space-8);
}

.section-alt {
  background-color: var(--color-bg-alt);
  border-block: 1px solid var(--color-border);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-6);
}

.section-lead {
  color: var(--color-text-muted);
}

.eyebrow {
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: var(--space-2);
}

.eyebrow a {
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: normal;
  font-weight: 500;
}

.eyebrow a:hover {
  color: var(--color-accent);
}

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-6);
  align-items: center;
}

/* --- Buttons ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--color-accent-contrast);
  box-shadow: 0 8px 24px rgba(91, 140, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(91, 140, 255, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --- Header / Navigation ----------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
  font-weight: 800;
  font-size: 1.3rem;
}

.logo-mark {
  color: var(--color-text);
}

.logo-accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo-text {
  color: var(--color-text-muted);
  font-weight: 600;
}

.nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav li {
  position: relative;
}

.nav a {
  display: inline-block;
  padding: var(--space-2) 0;
  color: var(--color-text-muted);
  font-weight: 500;
  transition: color var(--transition-fast);
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--color-text);
}

.nav a[aria-current="page"] {
  border-bottom-color: var(--color-accent);
}

.has-dropdown {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.dropdown-toggle {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-1);
  display: flex;
  align-items: center;
  transition: transform var(--transition-fast);
}

.has-dropdown.active .dropdown-toggle,
.has-dropdown.active > a {
  color: var(--color-text);
}

.dropdown {
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 0;
  min-width: 240px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown,
.has-dropdown.open .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.has-dropdown.open .dropdown-toggle {
  transform: rotate(180deg);
}

.dropdown li {
  width: 100%;
}

.dropdown a {
  display: block;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  border-bottom: none;
  white-space: nowrap;
}

.dropdown a:hover,
.dropdown a[aria-current="page"] {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 20px;
  margin-inline: auto;
  background: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero --------------------------------------------------------------- */
.hero {
  padding-block: var(--space-8) var(--space-7);
  background:
    radial-gradient(circle at 15% 20%, rgba(91, 140, 255, 0.16), transparent 45%),
    radial-gradient(circle at 85% 0%, rgba(139, 107, 255, 0.14), transparent 45%);
}

.hero-inner {
  max-width: 760px;
}

.hero-lead {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
  flex-wrap: wrap;
}

.page-hero {
  padding-block: var(--space-7) var(--space-6);
  background:
    radial-gradient(circle at 10% 0%, rgba(91, 140, 255, 0.14), transparent 45%);
  border-bottom: 1px solid var(--color-border);
}

.page-hero .hero-lead {
  max-width: 720px;
}

/* --- Cards ---------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: transform var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}

a.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

a.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  background: var(--color-surface-hover);
}

.service-card .card-link {
  margin-top: auto;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.service-card p {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.team-card {
  text-align: center;
}

.avatar-placeholder {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  margin: 0 auto var(--space-3);
  background: var(--gradient-accent);
  opacity: 0.35;
}

.reference-card {
  padding: 0;
  overflow: hidden;
}

.reference-image {
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(135deg, rgba(91, 140, 255, 0.25), rgba(139, 107, 255, 0.25));
}

.reference-card h3,
.reference-card p {
  padding-inline: var(--space-4);
}

.reference-card h3 {
  margin-top: var(--space-4);
}

.reference-card p {
  color: var(--color-text-muted);
  padding-bottom: var(--space-4);
}

/* --- Split-Layout / Visual-Platzhalter -------------------------------------- */
.split-text p {
  color: var(--color-text-muted);
}

.visual-card {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  background: var(--gradient-accent);
  opacity: 0.18;
  border: 1px solid var(--color-border);
}

/* --- Check-Liste ------------------------------------------------------------ */
.check-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: var(--space-3);
  color: var(--color-text-muted);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-accent);
}

.check-list-wide {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2) var(--space-5);
}

/* --- CTA-Bereich -------------------------------------------------------------- */
.cta-section {
  padding-block: var(--space-7);
}

.cta-inner {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
}

.cta-inner p {
  color: var(--color-text-muted);
}

/* --- Kontaktseite -------------------------------------------------------------- */
.contact-split {
  grid-template-columns: 1.3fr 1fr;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-row label {
  font-weight: 600;
  font-size: 0.9rem;
}

.form-row input,
.form-row textarea {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  padding: 0.75rem 0.9rem;
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
}

.form-row input:focus,
.form-row textarea:focus {
  border-color: var(--color-accent);
}

.form-row-checkbox {
  flex-direction: row;
  align-items: flex-start;
  gap: var(--space-2);
}

.form-row-checkbox input {
  margin-top: 0.3rem;
}

.form-row-checkbox label {
  font-weight: 400;
  color: var(--color-text-muted);
}

.form-row-checkbox a {
  color: var(--color-accent);
}

.form-note {
  min-height: 1.2em;
  color: var(--color-accent);
  font-size: 0.9rem;
}

.form-note-success {
  color: #6ee7b7;
}

.form-note-error {
  color: #ff8a8a;
}

.contact-info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.contact-list li {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

.contact-label {
  display: block;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.placeholder-tag {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--color-text-faint);
  margin-left: var(--space-1);
}

.map-placeholder {
  margin-top: var(--space-4);
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  border: 1px dashed var(--color-border-strong);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-faint);
  font-size: 0.9rem;
  text-align: center;
}

/* --- Rechtstexte (Impressum / Datenschutz) --------------------------------------- */
.legal-content {
  max-width: 760px;
}

.legal-content h2 {
  margin-top: var(--space-6);
}

.legal-content p {
  color: var(--color-text-muted);
}

.legal-warning {
  background: rgba(255, 176, 32, 0.1);
  border: 1px solid rgba(255, 176, 32, 0.35);
  color: #ffcf7a;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
}

/* --- Footer ------------------------------------------------------------------- */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-7) var(--space-4);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-5);
}

.footer-logo {
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: var(--space-2);
}

.footer-text {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-heading {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}

.footer-links li {
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-faint);
  font-size: 0.85rem;
}

/* --- Responsive ----------------------------------------------------------------- */
@media (max-width: 960px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .split,
  .contact-split {
    grid-template-columns: 1fr;
  }

  .split-visual {
    order: -1;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }

  .nav.open {
    max-height: 80vh;
    overflow-y: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav li {
    width: 100%;
  }

  .nav a {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }

  .has-dropdown {
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .has-dropdown a {
    width: auto;
    flex: 1;
  }

  .dropdown-toggle {
    padding: var(--space-3) var(--space-4);
  }

  .dropdown {
    position: static;
    width: 100%;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    background: var(--color-bg);
    display: none;
    padding: 0;
  }

  .has-dropdown.open .dropdown {
    display: block;
  }

  .dropdown a {
    padding-left: var(--space-6);
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }
}

@media (max-width: 640px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .check-list-wide {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .page-hero,
  .section {
    padding-block: var(--space-6);
  }
}