/*
  Thomas Menzl Softwareentwicklung – Stylesheet
  Mobile-first, keine Build-Tools, kein Framework.
  Markenfarben aus dem Logo abgeleitet (Deep Blue -> Cyan),
  bewusst sparsam als Akzent statt als flächiger Verlauf eingesetzt.
*/

:root {
  color-scheme: light dark;

  --bg: #f7f8fb;
  --bg-alt: #eef1f7;
  --fg: #152038;
  --muted: #5b6b88;
  --line: #dde3ee;
  --card-bg: #ffffff;

  --accent: #0a5cd6;
  --accent-2: #00b6c9;
  --accent-contrast: #ffffff;
  --focus-ring: #0a5cd6;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 20px 45px -28px rgba(21, 32, 56, 0.45);
  --shadow-card-hover: 0 26px 55px -24px rgba(21, 32, 56, 0.5);

  --container: 1120px;
  --container-narrow: 720px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1020;
    --bg-alt: #0f1526;
    --fg: #e8eefc;
    --muted: #9aa8c7;
    --line: #232d47;
    --card-bg: #131a2e;

    --accent: #4da8ff;
    --accent-2: #35e0e6;
    --accent-contrast: #071022;
    --focus-ring: #4da8ff;

    --shadow-card: 0 20px 45px -22px rgba(0, 0, 0, 0.6);
    --shadow-card-hover: 0 26px 55px -20px rgba(0, 0, 0, 0.65);
  }
}

/* ---------- Reset & Basis ---------- */

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1.1em;
}

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

a:hover {
  text-decoration: underline;
}

ul {
  margin: 0 0 1.1em;
  padding: 0;
}

/* Sichtbarer, konsistenter Fokusring für Tastaturnutzung */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.sr-only {
  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: -999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 0.7rem 1.1rem;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 1000;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ---------- Layout-Helfer ---------- */

.section-inner,
.header-inner,
.footer-inner,
.hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section-inner.narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: 4.5rem 0;
}

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

.section-head {
  max-width: 640px;
  margin: 0 0 2.5rem;
}

.section-lead,
.hero-lead {
  color: var(--muted);
  font-size: 1.08rem;
}

.center {
  text-align: center;
}

.center .btn {
  margin-top: 0.5rem;
}

/* ---------- Marke / Logo ---------- */

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--fg);
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 56px;
  height: auto;
  flex-shrink: 0;
}

.brand-mark.small {
  width: 36px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.01em;
  color: var(--fg);
}

.brand-sub {
  font-weight: 700;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ---------- Header & Navigation ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  flex-wrap: wrap;
}

.primary-nav a {
  color: var(--fg);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.3rem 0.1rem;
  border-bottom: 2px solid transparent;
}

.primary-nav a:hover,
.primary-nav a.active {
  color: var(--accent);
  text-decoration: none;
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 42px;
  padding: 0;
  cursor: pointer;
  position: relative;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--fg);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle-bars {
  top: 20px;
}

.nav-toggle-bars::before {
  top: -7px;
}

.nav-toggle-bars::after {
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars {
  background: transparent;
}

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

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

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-block;
  }

  .primary-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 1.25rem 1.25rem;
  }

  .primary-nav.is-open {
    display: flex;
  }

  .primary-nav a {
    width: 100%;
    padding: 0.6rem 0;
  }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.btn[hidden] {
  display: none;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #ffffff;
  box-shadow: 0 14px 28px -12px color-mix(in srgb, var(--accent) 55%, transparent);
}

.btn-primary:hover {
  box-shadow: 0 18px 32px -12px color-mix(in srgb, var(--accent) 65%, transparent);
}

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

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

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  padding: 0.65rem 1.2rem;
  font-size: 0.92rem;
}

.btn-outline:hover {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-color: var(--accent);
}

.appstore-soon {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
}

.appstore-soon::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  flex-shrink: 0;
}

.cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* ---------- Hero ---------- */

.hero {
  padding: 5rem 0 4rem;
}

.hero-inner {
  max-width: 780px;
}

.hero-logo {
  display: block;
  width: clamp(72px, 9vw, 128px);
  height: auto;
  margin-bottom: 1.75rem;
  filter: drop-shadow(0 16px 30px color-mix(in srgb, var(--accent) 35%, transparent));
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.hero-lead {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  max-width: 620px;
}

/* ---------- Projekte ---------- */

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 720px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.75rem 1.9rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0.85;
}

.project-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}

.project-tag {
  margin: 0 0 0.6rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.project-card h3 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.project-desc {
  color: var(--muted);
}

.feature-list {
  list-style: none;
  margin: 0 0 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.feature-list li {
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.95rem;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

/* ---------- CTA-Bereich ---------- */

.cta-section {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* ---------- Footer ---------- */

.site-footer {
  padding: 3rem 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-nav a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

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

.footer-copy {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  width: 100%;
  order: 3;
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
}

@media (min-width: 720px) {
  .footer-copy {
    width: auto;
    order: 0;
    border-top: none;
    padding-top: 0;
  }
}

/* ---------- Rechtliche Seiten (Impressum / Datenschutz) ---------- */

.legal-page {
  padding: 3.5rem 0 5rem;
}

.legal-page .section-inner {
  max-width: var(--container-narrow);
}

.legal-page h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: 0.3rem;
}

.legal-intro {
  color: var(--muted);
  margin-bottom: 2.5rem;
}

.legal-page h2 {
  font-size: 1.15rem;
  margin-top: 2.4rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
}

.legal-page section:first-of-type h2 {
  border-top: none;
  padding-top: 0;
}

.legal-page address {
  font-style: normal;
}

.legal-page ul {
  list-style: none;
  margin: 0 0 1.1em;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.legal-page li {
  position: relative;
  padding-left: 1.4rem;
}

.legal-page li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}