/* ============================================================
   MoE Sovereign – Custom Stylesheet
   Ergänzt Pico CSS v2 | Keine externen Ressourcen
   ============================================================ */

/* ── System Font Stack (keine Web-Fonts nötig) ─────────────── */
:root {
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, "DejaVu Sans Mono", monospace;

  /* Brand Farben – Light Mode */
  --brand-primary: #2563eb;
  --brand-primary-hover: #1d4ed8;
  --brand-accent: #7c3aed;
  --brand-success: #059669;
  --brand-warning: #d97706;
  --brand-danger: #dc2626;

  /* Layout */
  --section-padding: 4rem 0;
  --card-radius: 0.75rem;
  --nav-height: 4rem;
}

/* ── Dark Mode Anpassungen ─────────────────────────────────── */
[data-theme="dark"] {
  --brand-primary: #60a5fa;
  --brand-primary-hover: #93c5fd;
  --brand-accent: #a78bfa;
  --brand-success: #34d399;
  --pico-card-background-color: #1e1e2e;
  --pico-muted-background-color: #181825;
}

/* ── Skip Navigation (Barrierefreiheit) ───────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--brand-primary);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 0.5rem 0;
  transition: top 0.2s;
}

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

/* ── Navigation ────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--pico-muted-border-color);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--nav-height);
  padding: 0 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--pico-color);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-brand:hover {
  color: var(--brand-primary);
  text-decoration: none;
}

.nav-logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--brand-primary);
  color: #fff;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 900;
  font-family: var(--font-mono);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: block;
  padding: 0.375rem 0.75rem;
  border-radius: 0.375rem;
  font-size: 0.9rem;
  color: var(--pico-muted-color);
  text-decoration: none;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--pico-color);
  background: var(--pico-muted-background-color);
}

.nav-links a[aria-current="page"] {
  color: var(--brand-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Theme Toggle Button */
#theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--pico-muted-border-color);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  font-size: 1rem;
  color: var(--pico-color);
  transition: background 0.15s, border-color 0.15s;
  padding: 0;
}

#theme-toggle:hover {
  background: var(--pico-muted-background-color);
  border-color: var(--brand-primary);
}

/* Hamburger Menu */
#nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--pico-muted-border-color);
  border-radius: 0.375rem;
  padding: 0.375rem 0.625rem;
  cursor: pointer;
  color: var(--pico-color);
  font-size: 1.25rem;
  line-height: 1;
}

/* ── Hero Section ──────────────────────────────────────────── */
.hero {
  padding: 5rem 1rem 4rem;
  text-align: center;
  background: linear-gradient(160deg, var(--pico-background-color) 0%, var(--pico-muted-background-color) 100%);
  border-bottom: 1px solid var(--pico-muted-border-color);
}

.hero-badge {
  display: inline-block;
  padding: 0.25rem 0.875rem;
  background: color-mix(in srgb, var(--brand-primary) 15%, transparent);
  color: var(--brand-primary);
  border: 1px solid color-mix(in srgb, var(--brand-primary) 30%, transparent);
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.15;
  font-weight: 800;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--pico-muted-color);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  padding-top: 2rem;
  border-top: 1px solid var(--pico-muted-border-color);
  max-width: 700px;
  margin: 0 auto;
}

.stat-item {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--brand-primary);
  line-height: 1;
  font-family: var(--font-mono);
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--pico-muted-color);
  margin-top: 0.25rem;
}

/* ── Section Layout ────────────────────────────────────────── */
.section {
  padding: var(--section-padding);
}

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

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-primary);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--pico-muted-color);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Pillars Grid ──────────────────────────────────────────── */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.pillar-card {
  padding: 1.75rem;
  border: 1px solid var(--pico-muted-border-color);
  border-radius: var(--card-radius);
  background: var(--pico-card-background-color);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.pillar-card:hover {
  border-color: var(--brand-primary);
  box-shadow: 0 4px 20px color-mix(in srgb, var(--brand-primary) 12%, transparent);
}

.pillar-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}

.pillar-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.pillar-card p {
  font-size: 0.9rem;
  color: var(--pico-muted-color);
  line-height: 1.6;
  margin: 0;
}

/* ── Feature Grid ──────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  border: 1px solid var(--pico-muted-border-color);
  border-radius: var(--card-radius);
  background: var(--pico-card-background-color);
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: var(--brand-primary);
}

.feature-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--pico-muted-color);
  margin: 0;
  line-height: 1.5;
}

/* ── Pipeline Diagram ──────────────────────────────────────── */
.pipeline-diagram {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  padding: 1.5rem;
  background: var(--pico-code-background-color, #0d1117);
  color: var(--pico-code-color, #e6edf3);
  border-radius: var(--card-radius);
  overflow-x: auto;
  border: 1px solid var(--pico-muted-border-color);
  white-space: pre;
}

/* ── Tables ────────────────────────────────────────────────── */
.table-responsive {
  overflow-x: auto;
  border-radius: var(--card-radius);
  border: 1px solid var(--pico-muted-border-color);
}

.table-responsive table {
  margin: 0;
}

/* ── Expert Table ──────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-t1 {
  background: color-mix(in srgb, var(--brand-success) 15%, transparent);
  color: var(--brand-success);
}

.badge-t2 {
  background: color-mix(in srgb, var(--brand-accent) 15%, transparent);
  color: var(--brand-accent);
}

.badge-both {
  background: color-mix(in srgb, var(--brand-warning) 15%, transparent);
  color: var(--brand-warning);
}

/* ── MCP Tools Grid ────────────────────────────────────────── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.tool-category {
  padding: 1.5rem;
  border: 1px solid var(--pico-muted-border-color);
  border-radius: var(--card-radius);
  background: var(--pico-card-background-color);
}

.tool-category h3 {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--brand-primary);
  margin-bottom: 0.75rem;
}

.tool-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tool-list li {
  padding: 0.2rem 0;
  font-size: 0.875rem;
  font-family: var(--font-mono);
  color: var(--pico-muted-color);
  border-bottom: 1px solid var(--pico-muted-border-color);
}

.tool-list li:last-child {
  border-bottom: none;
}

.tool-list code {
  color: var(--brand-accent);
  background: none;
  padding: 0;
}

/* ── Hardware Grid ─────────────────────────────────────────── */
.hw-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.hw-card {
  padding: 1.5rem;
  border: 1px solid var(--pico-muted-border-color);
  border-radius: var(--card-radius);
  background: var(--pico-card-background-color);
}

.hw-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--pico-muted-border-color);
}

.hw-node-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--brand-primary);
  color: #fff;
  border-radius: 0.375rem;
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.hw-card-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0;
  line-height: 1.3;
}

.hw-specs {
  list-style: none;
  padding: 0;
  margin: 0;
}

.hw-specs li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.3rem 0;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--pico-muted-border-color);
}

.hw-specs li:last-child {
  border-bottom: none;
}

.hw-spec-label {
  color: var(--pico-muted-color);
  flex-shrink: 0;
}

.hw-spec-value {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.hw-vram-total {
  margin-top: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: color-mix(in srgb, var(--brand-success) 12%, transparent);
  border-radius: 0.375rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand-success);
  text-align: center;
}

/* ── Code Block ────────────────────────────────────────────── */
.code-example {
  border-radius: var(--card-radius);
  overflow: hidden;
  border: 1px solid var(--pico-muted-border-color);
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--pico-muted-background-color);
  border-bottom: 1px solid var(--pico-muted-border-color);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--pico-muted-color);
}

.code-example pre {
  margin: 0;
  border-radius: 0;
  border: none;
}

/* ── Status / Roadmap ──────────────────────────────────────── */
.roadmap {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 700px;
  margin: 0 auto;
}

.roadmap-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--pico-muted-border-color);
  border-radius: var(--card-radius);
  background: var(--pico-card-background-color);
}

.roadmap-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 2rem;
  text-align: center;
}

.roadmap-item h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.roadmap-item p {
  font-size: 0.875rem;
  color: var(--pico-muted-color);
  margin: 0;
}

.roadmap-item.done {
  border-color: var(--brand-success);
  background: color-mix(in srgb, var(--brand-success) 5%, var(--pico-card-background-color));
}

.roadmap-item.active {
  border-color: var(--brand-primary);
  background: color-mix(in srgb, var(--brand-primary) 5%, var(--pico-card-background-color));
}

/* ── Caching Architecture ──────────────────────────────────── */
.cache-layers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.cache-layer {
  text-align: center;
  padding: 1.25rem;
  border: 1px solid var(--pico-muted-border-color);
  border-radius: var(--card-radius);
  background: var(--pico-card-background-color);
  position: relative;
}

.cache-layer-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--brand-accent);
  color: #fff;
  border-radius: 50%;
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.cache-layer h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.cache-layer p {
  font-size: 0.8rem;
  color: var(--pico-muted-color);
  margin: 0;
}

.cache-ttl {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.15rem 0.5rem;
  background: var(--pico-muted-background-color);
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--pico-muted-border-color);
  padding: 2.5rem 1rem;
  text-align: center;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1rem;
  list-style: none;
  padding: 0;
}

.footer-links a {
  color: var(--pico-muted-color);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.15s;
}

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

.footer-copy {
  font-size: 0.8rem;
  color: var(--pico-muted-color);
  margin: 0;
}

/* ── Subpage Layout (Impressum, Datenschutz) ───────────────── */
.subpage-header {
  padding: 3rem 1rem 2rem;
  border-bottom: 1px solid var(--pico-muted-border-color);
  background: var(--pico-muted-background-color);
}

.subpage-header h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  margin: 0;
}

.subpage-breadcrumb {
  font-size: 0.875rem;
  color: var(--pico-muted-color);
  margin-bottom: 0.75rem;
}

.subpage-breadcrumb a {
  color: var(--brand-primary);
  text-decoration: none;
}

.subpage-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 1rem;
}

.subpage-content h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--pico-muted-border-color);
}

.subpage-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  #nav-toggle {
    display: block;
  }

  #nav-menu {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--pico-background-color);
    border-bottom: 1px solid var(--pico-muted-border-color);
    padding: 1rem;
    z-index: 99;
  }

  #nav-menu.open {
    display: block;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .nav-links a {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
  }

  .hero {
    padding: 3rem 1rem 2.5rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .pipeline-diagram {
    font-size: 0.7rem;
  }
}

/* ── Print Styles ──────────────────────────────────────────── */
@media print {
  .site-header,
  .hero-actions,
  #theme-toggle,
  #nav-toggle {
    display: none !important;
  }

  .hero {
    background: none;
    padding: 1rem 0;
  }

  .section {
    page-break-inside: avoid;
  }
}

/* ── Focus Styles (Barrierefreiheit) ───────────────────────── */
:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Konfidenz Indicator ───────────────────────────────────── */
.konfidenz-demo {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding: 1.25rem;
  background: var(--pico-muted-background-color);
  border-radius: var(--card-radius);
  border: 1px solid var(--pico-muted-border-color);
  margin-top: 1rem;
}

.konfidenz-item {
  text-align: center;
}

.konfidenz-label {
  display: block;
  font-size: 0.75rem;
  color: var(--pico-muted-color);
  margin-bottom: 0.25rem;
}

.konfidenz-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.konfidenz-hoch { color: var(--brand-success); }
.konfidenz-mittel { color: var(--brand-warning); }
.konfidenz-niedrig { color: var(--brand-danger); }