:root{
  --bg:#0b0f14;
  --panel:#121923;
  --text:#e6edf3;
  --muted:#a9b4c2;
  --accent:#7cc7ff;
  --accent-2:#9ef0f0;
  --ok:#58d68d;
  --warn:#f5b942;
  --danger:#ff6b6b;
  --code-bg:#0a0f14;
  --border:#223243;
  --link:#8ab4ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, 'Helvetica Neue', Arial;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(11,15,20,0.88) 0%, rgba(11,15,20,0.84) 60%, rgba(13,20,28,0.92) 100%),
    url("https://www.ruthner.at/BG3.png") center/cover fixed no-repeat;
}

.container {
  max-width: 1100px;
  margin: 40px auto 80px;
  padding: 0 20px;
}

/* Header Styles */
.header {
  background: linear-gradient(135deg, rgba(124,199,255,.12), rgba(158,240,240,.06));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  backdrop-filter: blur(2px);
}

.badge {
  position: absolute;
  right: 18px;
  top: 18px;
  font-size: 12px;
  color: var(--muted);
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,.02);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.15;
  letter-spacing: .3px;
}

.subtitle {
  color: var(--muted);
  margin: 0 0 12px;
  font-size: 18px;
}

.kicker {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: .5px;
  text-transform: uppercase;
  font-size: 13px;
  margin-bottom: 10px;
}

/* Hero Actions */
.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

/* Button Styles */
.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 10px;
  background: linear-gradient(180deg, var(--accent), #4fc0ff);
  color: #041721;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid #66caff;
  transition: all 0.2s;
  font-size: 15px;
}

.btn:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(124,199,255,0.3);
}

.btn-secondary {
  background: rgba(255,255,255,.08);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: rgba(255,255,255,.12);
  filter: none;
}

.btn-live {
  background: linear-gradient(180deg, var(--ok), #3eb86f);
  border: 1px solid var(--ok);
  position: relative;
}

.btn-live::before {
  content: '🔴';
  font-size: 10px;
  margin-right: 6px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Quick Start Box */
.quick-start {
  background: linear-gradient(135deg, rgba(88,214,141,.15), rgba(124,199,255,.08));
  border: 2px solid var(--ok);
  border-radius: 14px;
  padding: 24px;
  margin: 24px 0;
  box-shadow: 0 6px 18px rgba(0,0,0,.25);
}

.quick-start h2 {
  margin-top: 0;
  color: var(--ok);
  font-size: 24px;
}

.quick-step {
  display: flex;
  gap: 16px;
  margin: 16px 0;
  align-items: flex-start;
}

.step-num {
  background: var(--ok);
  color: #041721;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
}

.step-content h4 {
  margin: 0 0 6px;
  color: var(--text);
}

/* Grid Layouts */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media(min-width: 900px) {
  .grid {
    grid-template-columns: 2fr 1fr;
  }
  .grid.two-col {
    grid-template-columns: 1fr 1fr;
  }
}

/* Panel Styles */
.panel, .callout {
  background: rgba(18,25,35,.92);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 6px 18px rgba(0,0,0,.25);
  backdrop-filter: blur(2px);
}

.callout {
  border-left: 3px solid var(--accent);
  background: rgba(18,25,35,.95);
}

.callout-warning {
  border-left-color: var(--warn);
  background: rgba(245,185,66,.05);
}

.callout-danger {
  border-left-color: var(--danger);
  background: rgba(255,107,107,.05);
}

.callout-success {
  border-left-color: var(--ok);
  background: rgba(88,214,141,.05);
}

.callout strong {
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}

.callout-warning strong {
  color: var(--warn);
}

.callout-danger strong {
  color: var(--danger);
}

.callout-success strong {
  color: var(--ok);
}

/* Typography */
h2 {
  margin: 16px 0 14px;
  font-size: 24px;
  scroll-margin-top: 20px;
}

h3 {
  margin: 18px 0 10px;
  font-size: 19px;
  scroll-margin-top: 20px;
}

h4 {
  margin: 12px 0 8px;
  font-size: 16px;
}

p {
  margin: 8px 0 12px;
}

ul {
  margin: 8px 0 12px 22px;
}

li {
  margin: 4px 0;
}

/* Code Styles */
code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 14px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  overflow: auto;
  position: relative;
  line-height: 1.5;
}

pre:hover .copy-btn {
  opacity: 1;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(255,255,255,.1);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  opacity: 0;
  transition: opacity 0.2s;
}

.copy-btn:hover {
  background: rgba(255,255,255,.15);
  color: var(--text);
}

code.inline {
  background: rgba(255,255,255,.06);
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

/* Table Styles */
.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

th, td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

th {
  background: rgba(255,255,255,.03);
  color: var(--accent-2);
  font-weight: 600;
}

tr:hover td {
  background: rgba(255,255,255,.02);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* Keyboard Key */
kbd {
  background: #10151d;
  border: 1px solid var(--border);
  border-bottom-color: #1c2a3a;
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 12px;
  box-shadow: inset 0 -1px 0 rgba(0,0,0,.3);
  font-family: inherit;
}

/* Links */
a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* Divider */
hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

/* Table of Contents */
.toc {
  position: sticky;
  top: 20px;
}

.toc a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--muted);
  transition: all 0.2s;
}

.toc a:hover {
  background: rgba(255,255,255,.06);
  color: var(--text);
  text-decoration: none;
  transform: translateX(4px);
}

/* Tags */
.tag {
  display: inline-block;
  margin-right: 8px;
  margin-bottom: 8px;
  padding: 5px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255,255,255,.02);
  font-size: 12px;
  font-weight: 500;
}

.tag.tag-ok {
  border-color: var(--ok);
  color: var(--ok);
  background: rgba(88,214,141,.08);
}

.tag.tag-warn {
  border-color: var(--warn);
  color: var(--warn);
  background: rgba(245,185,66,.08);
}

.tag.tag-danger {
  border-color: var(--danger);
  color: var(--danger);
  background: rgba(255,107,107,.08);
}

/* Footer */
.footer {
  color: var(--muted);
  font-size: 13px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
}

/* Utility Classes */
.small {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.highlight {
  color: var(--accent);
  font-weight: 600;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.feature-card {
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  transition: all 0.3s;
}

.feature-card:hover {
  background: rgba(255,255,255,.04);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,.2);
}

.feature-card h4 {
  color: var(--accent-2);
  margin: 0 0 8px;
  font-size: 16px;
}

.feature-icon {
  font-size: 24px;
  margin-bottom: 10px;
  display: block;
}

/* Requirements Box */
.requirements {
  background: rgba(124,199,255,.06);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 16px;
  margin: 16px 0;
}

.requirements ul {
  margin: 8px 0 0 20px;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--accent);
  color: #041721;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  transition: all 0.3s;
  box-shadow: 0 4px 12px rgba(0,0,0,.3);
  z-index: 100;
  text-decoration: none;
}

.back-to-top.visible {
  opacity: 1;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(124,199,255,.4);
}

/* Responsive Design */
@media(max-width: 768px) {
  .hero-actions {
    flex-direction: column;
  }
  
  .btn {
    text-align: center;
  }
  
  .quick-step {
    flex-direction: column;
    gap: 12px;
  }
  
  .step-num {
    align-self: flex-start;
  }
}

/* Live Demo Box */
.live-demo-box {
  background: rgba(124,199,255,.08);
  border: 2px solid var(--accent);
  border-radius: 12px;
  padding: 20px;
  margin: 16px 0;
}

.live-demo-box h3 {
  margin-top: 0;
  color: var(--accent);
}

/* Download Box */
.download-box {
  background: linear-gradient(135deg, rgba(124,199,255,.12), rgba(158,240,240,.08));
  border: 2px solid var(--accent);
  border-radius: 14px;
  padding: 28px;
  text-align: center;
}

.download-box h3 {
  margin-top: 0;
  font-size: 28px;
}

.download-box .btn {
  font-size: 18px;
  padding: 16px 32px;
}

/* Version Badge */
.version-badge {
  display: inline-block;
  background: var(--ok);
  color: #041721;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  margin-left: 8px;
}
/* Back Home Button */
.back-home {
  position: fixed;
  top: 20px;
  left: 20px;
  background: rgba(18,25,35,.95);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0,0,0,.3);
  backdrop-filter: blur(10px);
  transition: all 0.3s;
  z-index: 999;
}

.back-home:hover {
  background: rgba(124,199,255,.15);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateX(-3px);
  text-decoration: none;
  box-shadow: 0 6px 16px rgba(124,199,255,.2);
}

@media(max-width: 768px) {
  .back-home {
    top: 10px;
    left: 10px;
    padding: 8px 12px;
    font-size: 13px;
  }
}