/* ==========================================================================
   Aquila IT Consulting – Stylesheet
   Systemschriften, keine externen Fonts, keine Drittanbieter-Ressourcen.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design-Tokens
   -------------------------------------------------------------------------- */
:root {
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif;

  --navy: #123A63;
  --navy-deep: #0C2745;
  --teal: #1E7695;
  --teal-bright: #2E9BC0;

  --max-width: 1120px;
  --radius: 14px;
  --radius-sm: 8px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  --transition: 160ms ease;
}

/* Helles Farbschema */
:root,
[data-theme="light"] {
  --bg: #F6F8FB;
  --surface: #FFFFFF;
  --surface-2: #EEF3F8;
  --border: #D3DEE9;
  --border-strong: #748699;

  --text: #12212F;
  --text-muted: #4A5B6E;

  --accent: #14547F;
  --accent-hover: #0D3E5F;
  --accent-soft: #E3EEF6;
  --on-accent: #FFFFFF;

  --focus: #0B5FA5;
  --shadow: 0 1px 2px rgba(18, 33, 47, 0.06), 0 8px 24px rgba(18, 33, 47, 0.06);
}

/* Dunkles Farbschema */
[data-theme="dark"] {
  --bg: #0C141D;
  --surface: #141F2B;
  --surface-2: #1A2836;
  --border: #26384A;
  --border-strong: #63819C;

  --text: #E9EFF6;
  --text-muted: #A9BCCE;

  --accent: #56B4DA;
  --accent-hover: #7BC8E7;
  --accent-soft: #16303F;
  --on-accent: #06131C;

  --focus: #7BC8E7;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--bg);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  margin: 0 0 var(--space-3);
  color: var(--text);
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.9rem, 1.2rem + 3vw, 3rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 1.1rem + 1.8vw, 2.1rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin: 0 0 var(--space-4);
}

ul {
  margin: 0;
  padding: 0;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

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

/* Sichtbarer Tastaturfokus */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   3. Layout-Hilfen
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: clamp(3rem, 2rem + 5vw, 5.5rem);
}

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

.section__eyebrow {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-2);
}

.section__intro {
  max-width: 60ch;
  color: var(--text-muted);
  margin-bottom: var(--space-8);
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 200;
  padding: var(--space-3) var(--space-4);
  background-color: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-4);
  color: var(--on-accent);
}

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0.7rem 1.5rem;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
    border-color var(--transition);
}

.btn--primary {
  background-color: var(--accent);
  color: var(--on-accent);
  border-color: var(--accent);
}

.btn--primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--on-accent);
}

.btn--secondary {
  background-color: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn--secondary:hover {
  background-color: var(--accent-soft);
  color: var(--accent-hover);
}

.btn--ghost {
  background-color: var(--surface-2);
  color: var(--text);
  border-color: var(--border-strong);
  font-weight: 500;
}

.btn--ghost:hover {
  background-color: var(--accent-soft);
  color: var(--text);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

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

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 4.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text);
  padding-block: var(--space-2);
}

.brand__mark {
  display: block;
  width: auto;
  height: 46px;
}

.brand__mark--dark {
  display: none;
}

[data-theme="dark"] .brand__mark--light {
  display: none;
}

[data-theme="dark"] .brand__mark--dark {
  display: block;
}

.brand__name {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav__link {
  display: inline-block;
  padding: 0.5rem 0.75rem;
  min-height: 44px;
  line-height: 2rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
}

.nav__link:hover {
  color: var(--text);
  background-color: var(--surface-2);
}

.nav__link[aria-current="true"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.theme-toggle,
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0.4rem;
  background-color: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.theme-toggle:hover,
.nav-toggle:hover {
  color: var(--text);
  background-color: var(--surface-2);
}

.theme-toggle svg,
.nav-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

.nav-toggle {
  display: none;
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

.nav-toggle[aria-expanded="true"] .icon-menu {
  display: none;
}

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

  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .nav[hidden] {
    display: none;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-3) var(--space-6) var(--space-6);
  }

  .nav__link {
    display: block;
    padding: 0.75rem 0.5rem;
    line-height: 1.6;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
  }

  .nav__link[aria-current="true"] {
    border-bottom-color: var(--accent);
  }

  .brand__mark {
    height: 36px;
  }

  .brand__name {
    font-size: 0.9375rem;
  }
}

@media (max-width: 380px) {
  .brand__name {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   6. Hero
   -------------------------------------------------------------------------- */
.hero {
  padding-block: clamp(3rem, 2rem + 6vw, 6rem);
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
}

.hero__eyebrow {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: var(--space-4);
}

.hero__title {
  max-width: 20ch;
  margin-bottom: var(--space-4);
}

.hero__lead {
  max-width: 62ch;
  font-size: 1.0625rem;
  color: var(--text-muted);
  margin-bottom: var(--space-8);
}

.hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  list-style: none;
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.hero__fact {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
}

.hero__fact svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   7. Karten-Raster
   -------------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

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

.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-4);
  background-color: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius-sm);
}

.card__icon svg {
  width: 22px;
  height: 22px;
}

.card__title {
  margin-bottom: var(--space-2);
}

.card__text {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: var(--space-4);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin-top: auto;
}

.tags li {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.6rem;
  color: var(--text-muted);
  background-color: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
}

/* --------------------------------------------------------------------------
   8. Anwendungsfälle
   -------------------------------------------------------------------------- */
.usecase dt {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-1);
}

.usecase dd {
  margin: 0 0 var(--space-4);
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.usecase dd:last-child {
  margin-bottom: 0;
}

.notice {
  margin-top: var(--space-6);
  padding: var(--space-4);
  font-size: 0.875rem;
  color: var(--text-muted);
  background-color: var(--surface-2);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
}

.notice p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   9. Ablauf
   -------------------------------------------------------------------------- */
.steps {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  list-style: none;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  padding-top: var(--space-4);
  border-top: 3px solid var(--border-strong);
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: var(--space-2);
}

.steps h3 {
  font-size: 1.0625rem;
  margin-bottom: var(--space-2);
}

.steps p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   10. Über mich
   -------------------------------------------------------------------------- */
.about {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

@media (min-width: 900px) {
  .about {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: var(--space-12);
  }
}

.about__card {
  padding: var(--space-6);
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

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

.about__photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border-strong);
  margin-bottom: var(--space-4);
}

.about__name {
  font-size: 1.125rem;
  margin-bottom: var(--space-1);
}

.about__role {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.about__quote {
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-6);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
  border-left: 3px solid var(--accent);
  background-color: var(--surface-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.about__quote p {
  margin: 0;
}

.checklist {
  list-style: none;
  display: grid;
  gap: var(--space-3);
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.checklist svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 0.2em;
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   11. Privatkunden
   -------------------------------------------------------------------------- */
.private {
  padding: var(--space-8);
  background-color: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.private h2 {
  font-size: 1.375rem;
}

.private__intro {
  max-width: 62ch;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.private__grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-block: var(--space-6);
}

.private__grid h3 {
  font-size: 1rem;
  margin-bottom: var(--space-3);
}

.private__grid ul {
  list-style: none;
  display: grid;
  gap: var(--space-2);
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.private__grid li {
  padding-left: 1.1rem;
  position: relative;
}

.private__grid li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--accent);
}

/* --------------------------------------------------------------------------
   12. Kontakt und Formular
   -------------------------------------------------------------------------- */
.contact {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

@media (min-width: 900px) {
  .contact {
    grid-template-columns: 340px minmax(0, 1fr);
    gap: var(--space-12);
  }
}

.contact__details {
  list-style: none;
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact__details > li + li {
  margin-top: var(--space-4);
}

.contact__label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

.contact__value {
  font-size: 0.9375rem;
  color: var(--text);
  word-break: break-word;
}

.copy-status {
  display: block;
  margin-top: var(--space-3);
  font-size: 0.875rem;
  font-weight: 500;
  min-height: 1.4em;
}

.copy-status[data-state="ok"] {
  color: var(--accent);
}

.copy-status[data-state="error"] {
  color: #C0392B;
}

[data-theme="dark"] .copy-status[data-state="error"] {
  color: #FF9A8B;
}

.form {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-6);
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

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

.form__row {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

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

.field label {
  font-size: 0.875rem;
  font-weight: 600;
}

.field .optional {
  font-weight: 400;
  color: var(--text-muted);
}

.field input,
.field select,
.field textarea {
  font: inherit;
  font-size: 0.9375rem;
  min-height: 44px;
  padding: 0.6rem 0.75rem;
  color: var(--text);
  background-color: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
}

.section--alt .field input,
.section--alt .field select,
.section--alt .field textarea {
  background-color: var(--surface);
}

.field textarea {
  min-height: 130px;
  resize: vertical;
}

.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible {
  border-color: var(--focus);
}

.field-error {
  font-size: 0.8125rem;
  font-weight: 500;
  color: #C0392B;
  min-height: 1.2em;
}

[data-theme="dark"] .field-error {
  color: #FF9A8B;
}

.form__hint {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 0;
}

/* --------------------------------------------------------------------------
   13. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding-block: var(--space-12) var(--space-8);
  background-color: var(--surface);
  border-top: 1px solid var(--border);
}

.site-footer__top {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  justify-content: space-between;
  margin-bottom: var(--space-8);
}

.site-footer__brand p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.site-footer__brand strong {
  display: block;
  font-size: 1.0625rem;
  color: var(--text);
  margin-bottom: var(--space-1);
}

.site-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  list-style: none;
}

.site-footer__nav a {
  font-size: 0.9375rem;
  color: var(--text-muted);
  text-decoration: none;
  display: inline-block;
  padding-block: 0.35rem;
}

.site-footer__nav a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.site-footer__legal {
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.site-footer__legal p {
  margin: 0;
}

/* --------------------------------------------------------------------------
   14. Rechtstexte / Unterseiten
   -------------------------------------------------------------------------- */
.legal {
  max-width: 74ch;
}

.legal h2 {
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
  font-size: 1.375rem;
}

.legal h3 {
  margin-top: var(--space-6);
  font-size: 1.0625rem;
}

.legal address {
  font-style: normal;
  margin-bottom: var(--space-4);
}

.legal ul {
  padding-left: 1.25rem;
  margin-bottom: var(--space-4);
}

.legal li {
  margin-bottom: var(--space-2);
}

.legal__meta {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.page-header {
  padding-block: var(--space-12) var(--space-6);
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
}

.error-page {
  text-align: center;
  padding-block: clamp(4rem, 3rem + 8vw, 8rem);
}

.error-page p {
  max-width: 52ch;
  margin-inline: auto;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   15. Bewegungsreduktion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* --------------------------------------------------------------------------
   16. Druck
   -------------------------------------------------------------------------- */
@media print {
  .site-header,
  .site-footer__nav,
  .theme-toggle,
  .nav-toggle,
  .form {
    display: none;
  }
}