/* Font Face Definitions - Self-hosted Inter */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/Inter-Regular.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/Inter-Medium.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/Inter-Bold.woff2') format('woff2');
}

/* CSS Variables - Color Palette */
:root {
  --bg-primary: #0D1117;
  --bg-surface: #161B22;
  --bg-terminal: #0A0F14;
  --accent-cyan: #06B6D4;
  --accent-green: #22C55E;
  --accent-yellow: #EAB308;
  --accent-magenta: #D946EF;
  --text-primary: #E6EDF3;
  --text-secondary: #8B949E;
  --border: #30363D;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

pre, code {
  font-family: var(--font-mono);
}

pre {
  margin: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--text-primary);
}

a svg {
  vertical-align: -0.125em;
  margin-right: 0.25rem;
}

.tap-target {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 0.25rem;
}

/* Layout */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo span {
  color: var(--accent-cyan);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

nav a:hover {
  color: var(--text-primary);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
}

.hero-content {
  max-width: 700px;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero h1 .highlight {
  color: var(--accent-cyan);
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

/* Code Block */
.code-block {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.code-block code {
  color: var(--accent-green);
}

.code-block .prompt {
  color: var(--text-secondary);
  user-select: none;
}

.copy-button {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 0.25rem 0.6rem;
  min-height: 44px;
  min-width: 44px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.copy-button:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.copy-button:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
  min-height: 44px;
}

.btn-primary {
  background: var(--accent-green);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: #16a34a;
  color: var(--bg-primary);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

/* Pain Point Section */
.pain-point {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.pain-point h2 {
  margin-bottom: 2rem;
}

.pain-point h2 span {
  color: var(--text-secondary);
}

.problem-intro {
  font-size: 1.05rem;
  margin: 0 0 2rem;
  max-width: 640px;
  color: var(--text-secondary);
}

.problem-list {
  display: grid;
  gap: 1.5rem;
  max-width: 600px;
}

.problem-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.problem-icon {
  color: var(--accent-yellow);
  font-size: 1.25rem;
  flex-shrink: 0;
  line-height: 1.6;
}

.problem-item h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.problem-item p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Solution Section */
.solution h2 {
  margin-bottom: 1.5rem;
}

.solution-intro {
  font-size: 1.1rem;
  margin-bottom: 3rem;
  max-width: 600px;
}

.loop-diagram {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  overflow-x: auto;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.loop-diagram pre {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.loop-diagram .cyan { color: var(--accent-cyan); }
.loop-diagram .green { color: var(--accent-green); }
.loop-diagram .yellow { color: var(--accent-yellow); }
.loop-diagram .magenta { color: var(--accent-magenta); }

/* How It Works Section */
.how-it-works {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.steps {
  display: grid;
  gap: 3rem;
  margin-top: 3rem;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  align-items: start;
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--accent-cyan);
  color: var(--bg-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.step-content h3 {
  margin-bottom: 0.5rem;
}

.step-content p {
  margin-bottom: 1rem;
}

.step-code {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  overflow-x: auto;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.step-code pre {
  font-size: 0.85rem;
  margin: 0;
  color: var(--text-secondary);
}

.step-code .comment {
  color: var(--text-secondary);
}

.step-code .key {
  color: var(--accent-cyan);
}

.step-code .value {
  color: var(--accent-green);
}

/* Verification Section */
.verification h2 {
  margin-bottom: 1.5rem;
}

.verification-intro {
  font-size: 1.1rem;
  margin-bottom: 3rem;
  max-width: 600px;
}

.verification-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.verification-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.verification-card h3 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.verification-card .check {
  color: var(--accent-green);
}

.verification-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Get Started Section */
.get-started {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.get-started h2 {
  margin-bottom: 2rem;
}

.install-block {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.install-block .label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.install-block code {
  display: block;
  font-size: 1.25rem;
  color: var(--accent-green);
}

.quick-steps {
  margin-top: 3rem;
}

.quick-steps h3 {
  margin-bottom: 1.5rem;
}

.quick-steps ol {
  list-style: none;
  counter-reset: quick-step;
}

.quick-steps li {
  counter-increment: quick-step;
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.quick-steps li::before {
  content: counter(quick-step) ".";
  color: var(--accent-cyan);
  font-weight: 700;
  flex-shrink: 0;
}

.quick-steps code {
  background: var(--bg-primary);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--accent-green);
}

/* Footer */
footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

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

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-author {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-author a {
  color: var(--text-secondary);
}

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

.social-link {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-left: 1rem;
}

/* Impressum Page */
.impressum-page {
  padding-top: 120px;
  min-height: 100vh;
}

.impressum-page h1 {
  margin-bottom: 2rem;
}

.impressum-page section {
  padding: 1.5rem 0;
}

.impressum-page h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.impressum-page p {
  margin-bottom: 0.5rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
  color: var(--accent-cyan);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  section {
    padding: 3rem 0;
  }

  .header-content {
    flex-direction: column;
    gap: 1rem;
  }

  nav ul {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding-top: 140px;
    min-height: auto;
  }

  .cta-group {
    flex-direction: column;
    align-items: stretch;
  }

  .code-block {
    width: 100%;
    justify-content: center;
  }

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

  .step-number {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }

  .loop-diagram {
    padding: 1rem;
  }

  .loop-diagram pre {
    font-size: 0.7rem;
  }
}

/* Utility Classes */
.mt-2 {
  margin-top: 2rem;
}

.mt-1-5 {
  margin-top: 1.5rem;
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .install-block code {
    font-size: 1rem;
  }

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

  .code-block {
    flex-wrap: wrap;
  }

  .loop-diagram {
    max-width: 100%;
  }

  .loop-diagram pre {
    font-size: 0.5rem;
  }

  .step-code {
    max-width: calc(100vw - 2rem);
  }

  .step-code pre {
    font-size: 0.75rem;
  }
}