/* ==========================================================================
   Promentum GmbH — Stylesheet
   Minimalistisch, vertrauensbildend, zeitlos
   ========================================================================== */

/* --- Design Tokens ------------------------------------------------------- */
:root {
  /* Farben */
  --color-primary: #1B3A6B;
  --color-accent:  #4A7BB8;
  --color-bg:      #FFFFFF;
  --color-bg-alt:  #F7F9FC;
  --color-border:  #E5EAF2;
  --color-text:    #333333;
  --color-text-muted: #5A6B80;
  --color-heading: #1B3A6B;

  /* Typografie */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --fs-xs:   0.8125rem;  /* 13px */
  --fs-sm:   0.9375rem;  /* 15px */
  --fs-base: 1rem;       /* 16px */
  --fs-lg:   1.125rem;   /* 18px */
  --fs-xl:   1.375rem;   /* 22px */
  --fs-2xl:  1.75rem;    /* 28px */
  --fs-3xl:  2.25rem;    /* 36px */
  --fs-4xl:  3rem;       /* 48px */

  /* Abstände */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* Layout */
  --container-max: 1180px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Schatten & Transitions */
  --shadow-sm:  0 1px 2px rgba(27, 58, 107, 0.04);
  --shadow-md:  0 4px 16px rgba(27, 58, 107, 0.06);
  --shadow-lg:  0 8px 32px rgba(27, 58, 107, 0.08);
  --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px; /* Höhe des Sticky-Headers */
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern' 1, 'liga' 1;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover,
a:focus-visible {
  color: var(--color-primary);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

h1, h2, h3, h4 {
  color: var(--color-heading);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

p {
  color: var(--color-text);
}

ul {
  list-style: none;
}

/* --- Sprachumschaltung: zeigt die aktive Sprache ------------------------- */
[data-lang] {
  display: none;
}
html[lang="de"] [data-lang="de"],
html[lang="en"] [data-lang="en"] {
  display: inline;
}
/* Block-Level-Elemente korrekt anzeigen */
html[lang="de"] div[data-lang="de"],
html[lang="de"] p[data-lang="de"],
html[lang="de"] h1[data-lang="de"],
html[lang="de"] h2[data-lang="de"],
html[lang="de"] h3[data-lang="de"],
html[lang="de"] li[data-lang="de"],
html[lang="en"] div[data-lang="en"],
html[lang="en"] p[data-lang="en"],
html[lang="en"] h1[data-lang="en"],
html[lang="en"] h2[data-lang="en"],
html[lang="en"] h3[data-lang="en"],
html[lang="en"] li[data-lang="en"] {
  display: block;
}

/* --- Container ---------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* --- Section -------------------------------------------------------------*/
.section {
  padding: var(--space-9) 0;
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-8);
}

.section-label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--fs-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- Header / Navigation ------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: var(--space-5);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-primary);
  flex-shrink: 0;
}

.logo-mark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.logo-wordmark {
  font-size: var(--fs-xl);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  line-height: 1;
}

.logo-sub {
  font-size: 0.6875rem;
  font-weight: 400;
  color: var(--color-accent);
  letter-spacing: 0.25em;
  display: block;
  margin-top: 2px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-list {
  display: flex;
  gap: var(--space-6);
}

.nav-list a {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding: var(--space-2) 0;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition);
}

.nav-list a:hover::after,
.nav-list a:focus-visible::after {
  transform: scaleX(1);
}

/* Sprachumschalter */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: var(--fs-xs);
  font-weight: 500;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 3px;
}

.lang-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  font: inherit;
  padding: 4px 10px;
  border-radius: 3px;
  transition: all var(--transition);
  font-family: var(--font-sans);
}

.lang-btn:hover {
  color: var(--color-primary);
}

.lang-btn.is-active {
  background-color: var(--color-primary);
  color: #fff;
}

/* Mobile-Menü-Button */
.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: var(--color-primary);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* --- Hero --------------------------------------------------------------- */
.hero {
  position: relative;
  padding: var(--space-9) 0 var(--space-9);
  overflow: hidden;
  background-color: var(--color-bg);
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 820px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-size: clamp(2rem, 5vw, var(--fs-4xl));
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--space-5);
  color: var(--color-primary);
}

.hero-subtitle {
  font-size: var(--fs-lg);
  color: var(--color-text-muted);
  max-width: 620px;
  margin-bottom: var(--space-7);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* --- Button ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 28px;
  font-family: inherit;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: #142e55;
  border-color: #142e55;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  color: var(--color-primary);
  border-color: var(--color-accent);
  background-color: var(--color-bg-alt);
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* --- Über uns ---------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}

.about-text p {
  font-size: var(--fs-lg);
  line-height: 1.7;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.about-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.fact-card {
  padding: var(--space-5);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.fact-value {
  font-size: var(--fs-2xl);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: var(--space-2);
}

.fact-label {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

/* --- Services Grid ----------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--color-accent);
  transition: all var(--transition);
}

.service-card:hover .service-icon {
  background-color: var(--color-primary);
  color: #fff;
}

.service-icon svg {
  width: 24px;
  height: 24px;
  stroke-width: 1.75;
}

.service-title {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}

.service-desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* --- Kontakt ----------------------------------------------------------- */
.contact-layout {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 380px) 1fr;
  gap: var(--space-7);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition);
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.contact-label {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  font-weight: 500;
}

.contact-value {
  font-size: var(--fs-lg);
  color: var(--color-primary);
  font-weight: 500;
  line-height: 1.5;
}

.contact-value a {
  color: var(--color-primary);
  text-decoration: none;
}

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

.contact-meta {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.contact-icon {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

/* --- Kontaktformular --------------------------------------------------- */
.contact-form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  box-shadow: var(--shadow-sm);
}

.form-heading {
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.form-intro {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.form-field {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-4);
}

.form-row .form-field {
  margin-bottom: 0;
}

.form-field label {
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.form-required {
  color: var(--color-accent);
  font-weight: 400;
}

.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="tel"],
.form-field select,
.form-field textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.form-field select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234A7BB8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px 16px;
  padding-right: 38px;
  cursor: pointer;
}

.form-field textarea {
  resize: vertical;
  min-height: 120px;
  font-family: var(--font-sans);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(74, 123, 184, 0.15);
}

.form-field input:invalid:not(:placeholder-shown),
.form-field textarea:invalid:not(:placeholder-shown) {
  border-color: #c0392b;
}

/* Checkbox-Feld (Datenschutz) */
.form-field--check {
  flex-direction: row;
  align-items: flex-start;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.form-field--check input[type="checkbox"] {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-field--check label {
  text-transform: none;
  letter-spacing: normal;
  font-size: var(--fs-sm);
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 0;
  cursor: pointer;
  display: block;
}

.form-field--check label a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-field--check label a:hover {
  color: var(--color-primary);
}

.form-actions {
  margin-top: var(--space-5);
}

.form-actions .btn {
  width: 100%;
}

.form-note {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.form-note.is-success {
  color: #1a7d4d;
  border-top-color: #1a7d4d;
}

.form-note.is-error {
  color: #c0392b;
  border-top-color: #c0392b;
}

/* --- Footer ------------------------------------------------------------ */
.site-footer {
  background-color: var(--color-primary);
  color: #C9D4E5;
  padding: var(--space-8) 0 var(--space-5);
  margin-top: var(--space-8);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--space-7);
  padding-bottom: var(--space-7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-link {
  color: #fff;
  margin-bottom: var(--space-4);
}

.footer-brand .logo-wordmark {
  color: #fff;
}

.footer-brand .logo-sub {
  color: var(--color-accent);
}

.footer-tagline {
  font-size: var(--fs-sm);
  color: #A8B7D1;
  line-height: 1.6;
  max-width: 320px;
}

.footer-heading {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #fff;
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.footer-list li {
  margin-bottom: var(--space-2);
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.footer-list a {
  color: #C9D4E5;
  transition: color var(--transition);
}

.footer-list a:hover {
  color: #fff;
}

.footer-bottom {
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--fs-xs);
  color: #A8B7D1;
}

.footer-bottom a {
  color: #A8B7D1;
}

.footer-bottom a:hover {
  color: #fff;
}

/* --- Legal Pages (Impressum, Datenschutz) ------------------------------ */
.legal-page {
  padding: var(--space-8) 0 var(--space-9);
}

.legal-container {
  max-width: 780px;
  margin: 0 auto;
}

.legal-title {
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-6);
  color: var(--color-primary);
}

.legal-container h2 {
  font-size: var(--fs-xl);
  margin-top: var(--space-7);
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}

.legal-container h3 {
  font-size: var(--fs-lg);
  margin-top: var(--space-5);
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}

.legal-container p {
  margin-bottom: var(--space-4);
  line-height: 1.75;
  color: var(--color-text);
}

.legal-container ul {
  margin-bottom: var(--space-4);
  padding-left: var(--space-5);
  list-style: disc;
}

.legal-container ul li {
  margin-bottom: var(--space-2);
  line-height: 1.7;
  color: var(--color-text);
}

.legal-container address {
  font-style: normal;
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-5);
  line-height: 1.7;
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-8);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-accent);
}

.legal-back svg {
  width: 16px;
  height: 16px;
}

.last-updated {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* --- Responsive ======================================================== */
@media (max-width: 960px) {
  .section { padding: var(--space-8) 0; }
  .hero { padding: var(--space-8) 0; }

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

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

@media (max-width: 720px) {
  :root {
    --fs-3xl: 1.875rem;
    --fs-4xl: 2.25rem;
  }

  .container { padding: 0 var(--space-4); }

  .header-inner { height: 68px; gap: var(--space-3); }
  .logo-mark { width: 34px; height: 34px; }
  .logo-wordmark { font-size: var(--fs-lg); }
  .logo-sub { font-size: 0.625rem; }

  /* Mobile nav */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4) var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform var(--transition);
    max-height: calc(100vh - 68px);
    overflow-y: auto;
  }

  .site-nav.is-open {
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    margin-bottom: var(--space-4);
  }

  .nav-list li {
    border-bottom: 1px solid var(--color-border);
  }

  .nav-list a {
    display: block;
    padding: var(--space-4) 0;
    font-size: var(--fs-base);
  }

  .nav-list a::after {
    display: none;
  }

  .lang-switch {
    align-self: flex-start;
  }

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

  .about-facts {
    grid-template-columns: 1fr;
  }

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

  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .contact-form {
    padding: var(--space-5);
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
    margin-bottom: 0;
  }

  .form-row .form-field {
    margin-bottom: var(--space-4);
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }
}

/* --- Reduced Motion ----------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- Print ------------------------------------------------------------- */
@media print {
  .site-header, .site-footer, .nav-toggle, .lang-switch { display: none; }
  body { color: #000; }
  a { color: #000; text-decoration: underline; }
}