:root {
  --bg-color: #F4F7F8;
  --surface-color: #FFFFFF;
  --text-main: #323A43;
  --text-muted: #5C6773;
  --accent-color: #9900FF;
  --accent-soft: rgba(153, 0, 255, 0.08);
  --border-subtle: #E2E7EB;
  --radius-sharp: 0px;
  --font-main: 'Atkinson Hyperlegible', sans-serif;
  --font-mono: 'Atkinson Hyperlegible Mono', monospace;
  --transition-speed: 0.15s;
  --layout-max-width: 1200px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Header als geschlossenes Modul */
.header-container {
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-subtle);
  padding: 3.5rem 0 2.5rem;
  width: 100%;
}

.header-inner {
  max-width: var(--layout-max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Obere Reihe: Titel links, Status rechts bündig */
.header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.header-title-group {
  max-width: 760px;
}

.system-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-color);
  background-color: var(--accent-soft);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sharp);
  display: inline-block;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.header-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Feste Bindung des Akzentbalkens an das Statusdatum */
.header-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  border-left: 2px solid var(--accent-color);
  padding-left: 0.85rem;
  white-space: nowrap;
}

.status-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.status-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

/* Steuerungsbereich im Header */
.header-controls {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.75rem;
}

.search-wrapper input {
  width: 100%;
  padding: 0.9rem 1.25rem;
  font-family: var(--font-main);
  font-size: 1rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  background-color: var(--surface-color); /* Weißer Grund */
  color: var(--text-main);
  outline: none;
  transition: border-color var(--transition-speed);
}

.search-wrapper input:focus {
  border-color: var(--accent-color);
}

/* Identische Maße für alle Filterschalter */
.filters-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.filter-btn {
  width: 150px;
  height: 44px;
  background-color: var(--surface-color);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  font-family: var(--font-main);
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.filter-btn:hover {
  border-color: var(--accent-color);
}

.filter-btn.active {
  background-color: var(--accent-color);
  color: #FFFFFF;
  border-color: var(--accent-color);
}

/* Hauptbereich: Reines Meilenstein-Raster */
.main-container {
  max-width: var(--layout-max-width);
  margin: 3rem auto 5rem;
  padding: 0 2rem;
}

.milestones-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-items: stretch;
}

@media (max-width: 960px) {
  .milestones-grid {
    grid-template-columns: 1fr;
  }
  .header-top {
    flex-direction: column;
    align-items: flex-start;
  }
  .header-status {
    align-items: flex-start;
  }
}

.card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100%;
  transition: transform var(--transition-speed), border-color var(--transition-speed);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-category {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-color);
  background-color: var(--accent-soft);
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sharp);
}

.card-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Feste Mindesthöhe sichert den synchronen Fließtext-Beginn */
.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
  min-height: 3.4rem;
  display: flex;
  align-items: flex-start;
}

.card-body {
  color: var(--text-muted);
  font-size: 0.98rem;
  flex-grow: 1;
  margin-bottom: 0.5rem;
}

/* Horizontale Linie & Tags bündig am Kartenfuß */
.card-meta {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
  display: flex;
  flex-wrap: nowrap;
  gap: 0.4rem;
  margin-top: auto;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background-color: var(--bg-color);
  color: var(--text-main);
  padding: 0.3rem 0.5rem;
  border-radius: var(--radius-sharp);
  white-space: nowrap;
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--transition-speed);
}

.tag:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background-color: var(--accent-soft);
}