/* ============================================================
   maxdev — Design System
   Dark terminal / cyberpunk aesthetic
   All fonts are system fonts — no external CDN requests (GDPR)
   ============================================================ */

/* ----------------------------------------------------------
   1. Design Tokens
   ---------------------------------------------------------- */
:root {
  /* Colors */
  --color-bg:           #0d0f0e;
  --color-bg-surface:   #131714;
  --color-bg-elevated:  #1a1f1b;
  --color-border:       #2a3128;

  --color-text-primary: #d4e8d0;
  --color-text-muted:   #6b8f66;
  --color-text-inverse: #0d0f0e;

  --color-accent:       #39ff83;
  --color-accent-dim:   #1a7a3c;
  --color-cyan:         #00e5cc;
  --color-cyan-dim:     #00766a;

  --color-warning:      #e5a000;

  /* System font stacks — no external requests */
  --font-mono: "Cascadia Code", "Fira Code", "JetBrains Mono",
               ui-monospace, "SF Mono", Consolas, "Liberation Mono", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica,
               Arial, sans-serif, "Apple Color Emoji";

  /* Type scale */
  --font-size-sm:   0.8125rem;
  --font-size-base: 1rem;
  --font-size-lg:   1.125rem;
  --font-size-xl:   1.375rem;
  --font-size-2xl:  1.75rem;
  --font-size-3xl:  2.25rem;

  --line-height-tight:  1.3;
  --line-height-normal: 1.65;

  /* Spacing (8 px grid) */
  --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;

  /* Layout */
  --max-width-content: 740px;
  --nav-height:        56px;

  /* Misc */
  --radius-sm: 4px;
  --radius-md: 6px;
  --border-width: 1px;
  --transition-fast: 120ms ease;
  --transition-base: 220ms ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Skip-to-content (accessibility) */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-accent);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--font-size-sm);
  z-index: 9999;
  text-decoration: none;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: var(--space-2);
}

a {
  color: var(--color-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--color-accent);
}
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ----------------------------------------------------------
   3. Navigation
   ---------------------------------------------------------- */
.site-nav {
  background: var(--color-bg-elevated);
  border-bottom: var(--border-width) solid var(--color-border);
  height: var(--nav-height);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-nav__inner {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-nav__brand {
  font-family: var(--font-mono);
  font-size: var(--font-size-lg);
  color: var(--color-accent);
  font-weight: 700;
  text-decoration: none;
  margin-right: auto;
  letter-spacing: -0.5px;
}
.site-nav__brand::before {
  content: "> ";
  opacity: 0.45;
  font-weight: 400;
}
.site-nav__brand:hover {
  color: var(--color-accent);
  opacity: 0.85;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  text-decoration: none;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border: var(--border-width) solid transparent;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--transition-fast),
              border-color var(--transition-fast),
              background var(--transition-fast);
}
.nav-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent-dim);
  background: rgba(57, 255, 131, 0.06);
  text-decoration: none;
}
.nav-link[aria-current="page"] {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: rgba(57, 255, 131, 0.10);
}

/* ----------------------------------------------------------
   4. Main Layout
   ---------------------------------------------------------- */
.site-main {
  flex: 1;
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
  width: 100%;
}

/* ----------------------------------------------------------
   5. Typography
   ---------------------------------------------------------- */
.page-header {
  margin-bottom: var(--space-12);
}

.page-title {
  font-family: var(--font-mono);
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-accent);
  line-height: var(--line-height-tight);
  letter-spacing: -1px;
  margin-bottom: var(--space-4);
}
/* Blinking cursor */
.page-title::after {
  content: "_";
  animation: blink 1.2s step-end infinite;
  opacity: 0.7;
}
@keyframes blink {
  50% { opacity: 0; }
}

.page-subtitle {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  max-width: 54ch;
  line-height: var(--line-height-normal);
}

h2 {
  font-family: var(--font-mono);
  font-size: var(--font-size-xl);
  color: var(--color-cyan);
  font-weight: 600;
  margin: var(--space-12) 0 var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-width) solid var(--color-border);
  letter-spacing: -0.3px;
}
h2::before {
  content: "## ";
  opacity: 0.35;
  font-weight: 400;
}

h3 {
  font-family: var(--font-mono);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  font-weight: 600;
  margin: var(--space-6) 0 var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

p {
  margin-bottom: var(--space-4);
  max-width: 66ch;
}

ul, ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
}
li {
  margin-bottom: var(--space-1);
}

/* Inline code */
code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-bg-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.35em;
  color: var(--color-cyan);
}

/* ----------------------------------------------------------
   6. Command Block
   ---------------------------------------------------------- */
.cmd-block {
  background: var(--color-bg-surface);
  border: var(--border-width) solid var(--color-border);
  border-left: 3px solid var(--color-accent-dim);
  border-radius: var(--radius-md);
  margin: var(--space-4) 0 var(--space-6);
  overflow: hidden;
  transition: border-left-color var(--transition-fast);
}
.cmd-block:hover {
  border-left-color: var(--color-accent);
}

.cmd-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
  border-bottom: var(--border-width) solid var(--color-border);
  background: rgba(255, 255, 255, 0.015);
}

.cmd-block__label {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  user-select: none;
}

.cmd-block__body {
  padding: var(--space-4);
  overflow-x: auto;
}

.cmd-block pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  line-height: 1.75;
  color: var(--color-text-primary);
  white-space: pre;
}

.cmd-block code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Shell prompt — non-selectable so users only copy the command */
.prompt {
  color: var(--color-accent);
  user-select: none;
  -webkit-user-select: none;
  pointer-events: none;
  font-weight: 700;
}

/* ----------------------------------------------------------
   7. Copy Button
   ---------------------------------------------------------- */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  background: transparent;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-3);
  cursor: pointer;
  transition: color var(--transition-fast),
              border-color var(--transition-fast),
              background var(--transition-fast);
  white-space: nowrap;
  min-width: 76px;       /* prevent layout shift "Copy" → "Copied!" */
  justify-content: center;
  line-height: 1.5;
}
.copy-btn:hover {
  color: var(--color-accent);
  border-color: var(--color-accent-dim);
  background: rgba(57, 255, 131, 0.06);
}
.copy-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.copy-btn--success {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: rgba(57, 255, 131, 0.10);
}

/* ----------------------------------------------------------
   8. Callout / Info Box
   ---------------------------------------------------------- */
.callout {
  background: var(--color-bg-surface);
  border: var(--border-width) solid var(--color-border);
  border-left: 3px solid var(--color-cyan);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-6) 0;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  max-width: 66ch;
}
.callout--warning {
  border-left-color: var(--color-warning);
}
.callout strong {
  color: var(--color-text-primary);
}

/* ----------------------------------------------------------
   9. Footer
   ---------------------------------------------------------- */
.site-footer {
  background: var(--color-bg-elevated);
  border-top: var(--border-width) solid var(--color-border);
  padding: var(--space-6);
  margin-top: auto;
}

.site-footer__inner {
  max-width: var(--max-width-content);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.site-footer__copy {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.site-footer__links {
  display: flex;
  gap: var(--space-6);
}
.site-footer__links a {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.site-footer__links a:hover {
  color: var(--color-accent);
}

/* ----------------------------------------------------------
   10. Impressum Page Specifics
   ---------------------------------------------------------- */
.impressum-section {
  margin-bottom: var(--space-12);
}
.impressum-section address {
  font-style: normal;
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-4);
}

/* ----------------------------------------------------------
   11. Responsive
   ---------------------------------------------------------- */
@media (max-width: 640px) {
  .site-nav__brand::before {
    content: "";
  }
  .page-title {
    font-size: var(--font-size-2xl);
  }
  .site-main {
    padding: var(--space-8) var(--space-4);
  }
  .site-footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .cmd-block__header {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
}

/* ----------------------------------------------------------
   12. Reduced Motion
   ---------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .page-title::after {
    animation: none;
  }
  * {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}