/* ========================================
   DESIGN TOKENS & COLOR PALETTE
   ======================================== */
:root {
  --bg: #0a0e1f;
  --bg-2: #131835;
  --surface: #1a1f3a;
  --surface-2: #232950;
  --line: #2d3460;
  --ink: #f5f5fa;
  --muted: #9ca0c4;
  --cyan: #2ec5e8;
  --magenta: #c93dc7;
  --gradient: linear-gradient(90deg, #2ec5e8 0%, #7d6dd6 50%, #c93dc7 100%);
  --radius: 16px;
  --space-xs: 8px;
  --space-s: 16px;
  --space-m: 24px;
  --space-l: 48px;
  --space-xl: 64px;
}

/* ========================================
   GLOBAL & TYPOGRAPHY
   ======================================== */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(circle at 100% 0%, rgba(201,61,199,0.08), transparent 50%),
    radial-gradient(circle at 0% 100%, rgba(46,197,232,0.08), transparent 50%);
}

h1 {
  font-size: clamp(28px, 5vw, 56px);
  font-weight: 300;
  line-height: 1.05;
  margin: 0 0 var(--space-s);
  letter-spacing: -0.02em;
}

h1 em {
  font-style: normal;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 600;
}

/* ========================================
   HEADER
   ======================================== */
header {
  padding: var(--space-s) var(--space-m);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-s);
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10,14,31,0.92);
  backdrop-filter: blur(12px);
}

header strong {
  font-size: clamp(13px, 2vw, 16px);
  font-weight: 600;
  letter-spacing: 0.02em;
}

header strong em {
  font-style: normal;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

header .meta {
  font-size: clamp(9px, 1.5vw, 11px);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

/* ========================================
   MAIN & LAYOUT
   ======================================== */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-l) var(--space-m) var(--space-xl);
}

.lead {
  color: var(--muted);
  margin: 0 0 var(--space-l);
  max-width: 60ch;
  font-size: clamp(14px, 2vw, 16px);
}

/* ========================================
   FILTER & TAXONOMY
   ======================================== */
.taxonomy {
  margin: var(--space-m) 0 var(--space-l);
  padding: var(--space-m);
  border: 1px solid rgba(46,197,232,0.18);
  background: rgba(15,22,46,0.88);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
}

.taxonomy-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-s);
  margin-bottom: var(--space-s);
  flex-wrap: wrap;
}

.taxonomy-header h2 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.taxonomy-sub {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.taxonomy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
}

.chip {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 8px 12px;
  cursor: pointer;
  font-size: 11px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  transition: all 0.2s;
  border-radius: 6px;
  min-height: 36px;
}
.chip:hover, .chip.active { border-color: var(--cyan); color: var(--ink); }

.clear-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 8px 12px;
  cursor: pointer;
  font-size: 11px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  transition: all 0.2s;
  border-radius: 6px;
  min-height: 36px;
}
.clear-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.clear-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.taxonomy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-s);
}

.taxonomy-card {
  background: rgba(17,24,47,0.95);
  border: 1px solid rgba(46,197,232,0.12);
  padding: var(--space-s);
  border-radius: 12px;
}

.taxonomy-card h3 {
  margin: 0 0 12px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.taxonomy-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

/* KPI filters */
.kpi-filter-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.kpi-filter-row {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  flex-wrap: wrap;
}
.kpi-filter-row:last-child { border-bottom: none; }

.kpi-filter-label {
  flex: 0 0 150px;
  font-size: 12px;
  color: var(--ink);
  font-weight: 500;
}

.kpi-filter-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* Collapsed state */
.taxonomy.collapsed { padding: var(--space-m) var(--space-s) var(--space-s); }

.taxonomy-collapsed-info {
  margin-top: var(--space-s);
  padding: var(--space-s);
  border-top: 1px solid rgba(46,197,232,0.14);
  background: rgba(255,255,255,0.03);
  border-radius: 12px;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.taxonomy-collapsed-info strong { color: var(--ink); font-weight: 600; }
.collapsed-summary { display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; }
.taxonomy-collapsed-info p { margin: 0; line-height: 1.7; }
.taxonomy-collapsed-hint { margin: 0; color: var(--muted); line-height: 1.8; }

.taxonomy-mini-pills { display: flex; flex-wrap: wrap; gap: 6px; }
.taxonomy-mini-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid rgba(46,197,232,0.14);
  background: rgba(255,255,255,0.04);
  color: var(--ink);
  font-size: 12px;
  border-radius: 999px;
}
.taxonomy-mini-pill em { font-style: normal; color: var(--cyan); }

/* ========================================
   PILLS & BUTTONS
   ======================================== */
.pill-row { display: flex; flex-wrap: wrap; gap: 6px; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--ink);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 999px;
  min-height: 36px;
}
.pill:hover { border-color: rgba(46,197,232,0.35); background: rgba(46,197,232,0.08); }
.pill.active {
  border-color: transparent;
  background: linear-gradient(135deg, rgba(46,197,232,0.2), rgba(201,61,199,0.16));
}

.pill-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 16px;
  padding: 0 5px;
  border-radius: 999px;
  background: rgba(46,197,232,0.12);
  color: var(--cyan);
  font-size: 11px;
  font-weight: 600;
}

.pill.mini {
  padding: 6px 10px;
  font-size: 11px;
  letter-spacing: 0.04em;
  min-height: 32px;
}
.pill.mini.level-high { background: rgba(46,197,232,0.18); border-color: var(--cyan); color: var(--cyan); }
.pill.mini.level-low  { background: rgba(201,61,199,0.18); border-color: var(--magenta); color: var(--magenta); }
.pill.mini.level-medium { background: rgba(255,255,255,0.06); }
.pill.mini.level-medium.active {
  background: rgba(46,197,232,0.25);
  border-color: transparent;
  color: var(--ink);
}

/* ========================================
   LOGO
   ======================================== */
.header-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo {
  height: 48px;
  width: auto;
  object-fit: contain;
}

/* ========================================
   GRID & CARDS
   ======================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-s);
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: var(--space-m);
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
  position: relative;
  overflow: hidden;
  border-radius: 10px;
}

@media (hover: hover) {
  .card:hover {
    transform: translateY(-3px);
    background: var(--surface-2);
    border-color: var(--cyan);
  }
  .card:hover::before { opacity: 1; }
}

/* Touch: active state instead of hover */
.card:active {
  background: var(--surface-2);
  border-color: var(--cyan);
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity 0.25s;
}

.card .icon {
  width: 32px;
  height: 32px;
  color: var(--cyan);
  margin-bottom: 18px;
  stroke-width: 1.5;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.card .count {
  display: inline-block;
  margin-top: 16px;
  font-size: 12px;
  color: var(--cyan);
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Use-case badge */
.uc-badge {
  display: inline-block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 3px 8px;
  margin-bottom: 14px;
  font-weight: 600;
}

.uc-badge.ai {
  background: var(--gradient);
  color: var(--bg);
}

.uc-badge.no-ai {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}

.card.no-ai-card {
  opacity: 0.7;
}

.card.no-ai-card:hover {
  opacity: 1;
}

/* ========================================
   BACK BUTTON
   ======================================== */
.back {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  padding: 0;
  margin-bottom: 32px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.back:hover {
  color: var(--cyan);
}

/* ========================================
   MODAL
   ======================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 31, 0.85);
  backdrop-filter: blur(8px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 64px 24px;
  overflow-y: auto;
  z-index: 100;
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  background: var(--bg-2);
  border: 1px solid var(--line);
  max-width: 680px;
  width: 100%;
  padding: 48px;
  position: relative;
  box-shadow: 0 30px 80px -10px rgba(0, 0, 0, 0.6);
}

.modal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  transition: all 0.2s;
}

.modal-close:hover {
  color: var(--ink);
  border-color: var(--cyan);
}

/* ========================================
   MODAL CONTENT
   ======================================== */
.modal .breadcrumb {
  font-size: 11px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.modal h2 {
  margin: 0 0 20px;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.modal .lede {
  color: var(--muted);
  font-size: 15px;
  margin: 0;
}

.modal-section {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.modal-section h4 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin: 0 0 14px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 6px 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink);
}

.tag.area {
  background: var(--gradient);
  color: var(--bg);
  border: none;
  font-weight: 600;
}

.tag.empty {
  opacity: 0.5;
  font-style: italic;
}

/* ========================================
   MODAL LISTS & GRIDS
   ======================================== */
.func-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.func-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--ink);
}

/* ========================================
   BENEFITS GRID
   ======================================== */
.benefit-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.benefit-card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 14px 16px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.benefit-card .ic {
  width: 18px;
  height: 18px;
  color: var(--cyan);
  flex-shrink: 0;
  margin-top: 2px;
  stroke-width: 1.8;
}

.benefit-card .txt {
  font-size: 13px;
  color: var(--ink);
  line-height: 1.35;
}

/* ========================================
   KPI GRID
   ======================================== */
.kpi-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.kpi-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 13px;
}

.kpi-row .label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
}

.kpi-row .label .ic {
  width: 14px;
  height: 14px;
  color: var(--muted);
  stroke-width: 1.8;
}

.kpi-row .trend {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}

.kpi-row .trend.up {
  color: var(--cyan);
}

.kpi-row .trend.down {
  color: var(--magenta);
}

.kpi-row .trend.flat {
  color: var(--muted);
}

/* ========================================
   RESPONSIVE – MOBILE FIRST
   ======================================== */
@media (max-width: 600px) {
  :root {
    --space-m: 16px;
    --space-l: 32px;
    --space-xl: 48px;
  }
  header { padding: 12px var(--space-m); }
  header .meta { display: none; }
  .logo { height: 36px; }
  main { padding: var(--space-l) var(--space-m) var(--space-xl); }
  .grid { grid-template-columns: 1fr; }
  .modal { padding: var(--space-m); }
  .modal-backdrop { padding: var(--space-m) 12px; }
  .benefit-grid { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: 1fr; }
  .taxonomy-grid { grid-template-columns: 1fr; }
  .taxonomy-actions { justify-content: flex-start; }
  .kpi-filter-label { flex: 0 0 120px; font-size: 11px; }
  .footer-inner { flex-direction: column; align-items: center; gap: 20px; text-align: center; }
  .footer-content { align-items: center; }
  .footer-contacts { justify-content: center; flex-direction: column; gap: 8px; }
  .footer-actions { justify-content: center; }
}

@media (max-width: 400px) {
  .pill { font-size: 11px; padding: 7px 10px; }
  .kpi-filter-row { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 601px) and (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .benefit-grid { grid-template-columns: repeat(2, 1fr); }
  .taxonomy-grid { grid-template-columns: 1fr; }
}

/* ========================================
   FOOTER
   ======================================== */
footer {
  border-top: 1px solid rgba(255,255,255,0.08);
  background: var(--bg-2);
  padding: var(--space-l) var(--space-m);
  margin-top: var(--space-xl);
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-l);
  flex-wrap: wrap;
}

.footer-logo-img {
  height: 72px;
  width: auto;
  display: block;
  flex-shrink: 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  min-width: 200px;
}

.footer-copy {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  line-height: 1.6;
}

.footer-contacts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.footer-contacts a {
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-contacts a:hover { color: var(--cyan); }

.footer-separator { color: rgba(255,255,255,0.25); font-size: 13px; }

.footer-actions {
  display: flex;
  align-items: center;
  gap: var(--space-s);
  flex-wrap: wrap;
}

.footer-impressum-btn {
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: color 0.2s;
}
.footer-impressum-btn:hover { color: var(--cyan); text-decoration: underline; }

.footer-linkedin-img img {
  height: 22px;
  width: auto;
  opacity: 0.7;
  transition: opacity 0.2s;
}
.footer-linkedin-img:hover img { opacity: 1; }