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

:root {
  --primary: #1a7a3a;
  --primary-light: #22a24d;
  --primary-dark: #145c2c;
  --primary-bg: #f0f7f2;
  --accent: #0d6efd;
  --dark: #0f1a14;
  --dark-card: #162118;
  --text: #1a1a1a;
  --text-muted: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f8faf9;
  --border: #e5e7eb;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --shadow-lg: 0 4px 12px rgba(0,0,0,.1), 0 16px 40px rgba(0,0,0,.1);
  --transition: .25s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; display: block; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ===== Nav ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
  transform: translateZ(0);
}
.nav.scrolled { box-shadow: var(--shadow); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.1rem; color: var(--text);
}
.nav-brand .logo-icon {
  width: 34px; height: 34px; border-radius: 8px;
}
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-links a { color: var(--text-muted); font-size: .925rem; font-weight: 500; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.lang-switch {
  background: var(--primary-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 5px 12px; font-size: .8rem; font-weight: 600;
  cursor: pointer; color: var(--primary); transition: all var(--transition);
}
.lang-switch:hover { background: var(--primary); color: #fff; }
.nav-donate {
  color: #e25555 !important; font-weight: 600 !important;
}
.nav-donate:hover { color: #c23b3b !important; }

/* Mobile menu */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 10px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: all var(--transition); border-radius: 2px; }

@media (max-width: 768px) {
  .nav { overflow: visible; }
  .nav-toggle { display: block; position: relative; z-index: 200; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
    flex-direction: column; gap: 0; padding: 8px 0;
    opacity: 0; pointer-events: none; transition: opacity var(--transition);
    box-shadow: var(--shadow-lg); z-index: 99;
  }
  .nav-links.open { opacity: 1; pointer-events: auto; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 24px; }
  .nav-links .lang-switch {
    display: block; width: calc(100% - 48px); margin: 8px 24px;
    padding: 10px; text-align: center;
  }
}

/* ===== Hero ===== */
.hero {
  padding: 120px 0 80px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-card) 100%);
  color: #fff; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -20%; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(26,122,58,.2) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(26,122,58,.15); border: 1px solid rgba(26,122,58,.3);
  border-radius: 20px; padding: 6px 16px; font-size: .8rem; color: var(--primary-light);
  margin-bottom: 20px;
}
.hero-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--primary-light); }
.hero h1 {
  font-size: 2.8rem; font-weight: 800; line-height: 1.15; margin-bottom: 16px;
  letter-spacing: -.02em;
}
.hero h1 .highlight { color: var(--primary-light); }
.hero p { font-size: 1.15rem; color: rgba(255,255,255,.7); margin-bottom: 32px; max-width: 480px; }
.hero-buttons { display: flex; gap: 12px; flex-wrap: wrap; }

/* Carousel */
.carousel {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: var(--dark-card); border: 1px solid rgba(255,255,255,.08);
  aspect-ratio: 16/10;
}
.carousel-track { display: flex; transition: transform .5s ease; height: 100%; }
.carousel-slide {
  min-width: 100%; display: flex; align-items: center; justify-content: center;
  background: var(--dark-card);
}
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; }
.carousel-dots {
  position: absolute; bottom: 12px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 8px;
}
.carousel-dots button {
  width: 8px; height: 8px; border-radius: 50%; border: none;
  background: rgba(255,255,255,.3); cursor: pointer; transition: all var(--transition);
}
.carousel-dots button.active { background: var(--primary-light); width: 24px; border-radius: 4px; }

@media (max-width: 768px) {
  .hero { padding: 100px 0 60px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 2rem; }
  .carousel { max-width: 100%; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 10px; font-size: .95rem; font-weight: 600;
  border: none; cursor: pointer; transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--primary); color: #fff;
  box-shadow: 0 2px 8px rgba(26,122,58,.3);
}
.btn-primary:hover { background: var(--primary-light); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(26,122,58,.4); }
.btn-outline {
  background: transparent; color: #fff;
  border: 1.5px solid rgba(255,255,255,.25);
}
.btn-outline:hover { border-color: rgba(255,255,255,.5); color: #fff; background: rgba(255,255,255,.05); }
.btn-sm { padding: 8px 20px; font-size: .85rem; }

/* ===== Features ===== */
.features { padding: 100px 0; background: var(--bg); }
.section-header { text-align: center; margin-bottom: 60px; }
.section-label {
  display: inline-block; font-size: .8rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; color: var(--primary); margin-bottom: 12px;
}
.section-header h2 { font-size: 2.2rem; font-weight: 800; letter-spacing: -.02em; }
.section-header p { color: var(--text-muted); max-width: 560px; margin: 12px auto 0; font-size: 1.05rem; }

.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  padding: 28px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg);
  transition: all var(--transition);
}
.feature-card:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-2px); }
.feature-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--primary-bg); display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin-bottom: 16px;
}
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { color: var(--text-muted); font-size: .9rem; line-height: 1.5; }

@media (max-width: 900px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .features-grid { grid-template-columns: 1fr; } }

/* ===== Download ===== */
.download {
  padding: 80px 0; background: var(--bg-alt);
}
.download-card {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-card) 100%);
  border-radius: 16px; padding: 60px; text-align: center; color: #fff;
  position: relative; overflow: hidden;
}
.download-card::before {
  content: ''; position: absolute; top: -40%; right: -10%; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(26,122,58,.15) 0%, transparent 70%);
}
.download-card h2 { font-size: 2rem; font-weight: 800; margin-bottom: 12px; position: relative; }
.download-card p { color: rgba(255,255,255,.6); margin-bottom: 32px; position: relative; }
.download-card .btn { position: relative; }
.download-buttons {
  display: flex; justify-content: center; gap: 16px;
  flex-wrap: wrap; position: relative;
}
.download-meta {
  display: flex; justify-content: center; gap: 32px; margin-top: 24px;
  font-size: .85rem; color: rgba(255,255,255,.4); position: relative;
}
.donate-hint { margin-top: 28px; position: relative; }
.btn-donate {
  background: transparent; color: rgba(255,255,255,.55);
  border: 1.5px solid rgba(255,255,255,.15); font-size: .9rem;
}
.btn-donate:hover {
  color: #e25555; border-color: #e25555; background: rgba(226,85,85,.08);
}
.btn-donate svg { transition: transform var(--transition); }
.btn-donate:hover svg { transform: scale(1.15); }
.download-older {
  margin-top: 20px; font-size: .8rem; color: rgba(255,255,255,.35); position: relative;
}
.download-older a { color: rgba(255,255,255,.5); text-decoration: underline; }
.download-older a:hover { color: rgba(255,255,255,.7); }

/* ===== Tech ===== */
.tech { padding: 80px 0; background: var(--bg); }
.tech-logos {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 32px; align-items: center;
}
.tech-item {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: 8px; border: 1px solid var(--border);
  font-size: .85rem; font-weight: 600; color: var(--text-muted);
  transition: all var(--transition);
}
.tech-item:hover { border-color: var(--primary); color: var(--primary); }

/* ===== Footer ===== */
.footer {
  padding: 40px 0; border-top: 1px solid var(--border);
  font-size: .85rem; color: var(--text-muted);
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px;
}
.footer-links { display: flex; gap: 24px; list-style: none; }
.footer-links a { color: var(--text-muted); }
.footer-links a:hover { color: var(--primary); }

/* ===== Subpages ===== */
.subpage { padding: 100px 0 60px; min-height: calc(100vh - 200px); }
.subpage h1 { font-size: 2rem; font-weight: 800; margin-bottom: 8px; }
.subpage .subtitle { color: var(--text-muted); margin-bottom: 40px; }
.subpage-content { max-width: 720px; }
.subpage-content h2 { font-size: 1.3rem; font-weight: 700; margin: 32px 0 12px; color: var(--text); }
.subpage-content h3 { font-size: 1.05rem; font-weight: 700; margin: 24px 0 8px; color: var(--text); }
.subpage-content p { color: var(--text-muted); margin-bottom: 12px; }
.subpage-content ul { color: var(--text-muted); padding-left: 20px; margin-bottom: 16px; }
.subpage-content li { margin-bottom: 6px; }

.changelog-entry {
  border-left: 3px solid var(--primary); padding-left: 20px; margin-bottom: 32px;
}
.changelog-entry .version {
  display: inline-block; background: var(--primary-bg); color: var(--primary);
  font-weight: 700; font-size: .85rem; padding: 3px 12px; border-radius: 6px; margin-bottom: 8px;
}
.changelog-entry .date { font-size: .8rem; color: var(--text-muted); margin-bottom: 8px; }

/* ===== Language content blocks ===== */
[data-lang="en"] { display: none; }

/* ===== Utilities ===== */
.text-center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }

/* Impressum specifics */
.impressum-section { margin-bottom: 24px; }
.impressum-section h2 { font-size: 1.15rem; margin-bottom: 8px; }

/* ===== Manual (Anleitung) ===== */
.manual { max-width: 800px; }
.manual-toc {
  background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 32px; margin-bottom: 40px;
}
.manual-toc h2 { margin: 0 0 12px; font-size: 1.2rem; }
.manual-toc ol { padding-left: 20px; margin: 0; }
.manual-toc li { margin-bottom: 4px; }
.manual-toc a { font-size: .95rem; }
.manual-chapter {
  margin-bottom: 48px; padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.manual-chapter:last-child { border-bottom: none; }
.manual-chapter h2 { font-size: 1.4rem; margin-bottom: 16px; color: var(--primary); }
.manual-chapter h3 { margin-top: 20px; }
.manual-chapter ol,
.manual-chapter ul { padding-left: 20px; color: var(--text-muted); margin-bottom: 16px; }
.manual-chapter ol li,
.manual-chapter ul li { margin-bottom: 6px; }
.manual-table {
  width: 100%; border-collapse: collapse; margin: 16px 0;
  font-size: .9rem;
}
.manual-table th {
  text-align: left; padding: 8px 12px; background: var(--bg-alt);
  border-bottom: 2px solid var(--border); font-weight: 600; color: var(--text);
}
.manual-table td {
  padding: 8px 12px; border-bottom: 1px solid var(--border); color: var(--text-muted);
}
.manual-table kbd {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  background: var(--bg-alt); border: 1px solid var(--border);
  font-family: monospace; font-size: .85rem;
}
.manual-chapter code {
  background: var(--bg-alt); padding: 2px 6px; border-radius: 4px;
  font-size: .85rem; border: 1px solid var(--border);
}

/* ===== Print (Manual) ===== */
@media print {
  .nav, .footer, .manual-toc { display: none !important; }
  .subpage { padding-top: 20px !important; }
  .manual-chapter { break-inside: avoid; page-break-inside: avoid; border-bottom: none; }
  .manual-chapter h2 { color: #000 !important; }
  .manual-table th { background: #f0f0f0 !important; }
  body { font-size: 11pt; color: #000; }
  a { color: #000 !important; text-decoration: none; }
  @page { size: A4; margin: 20mm; }
}