@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");

:root {
  --primary: #eb811c;
  --primary-hover: #d67318;
  --primary-light: rgba(235, 129, 28, 0.10);
  --primary-soft: rgba(235, 129, 28, 0.18);
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-light: #fff;
  --bg-primary: #fff;
  --bg-secondary: #f5f5f7;
  --bg-tertiary: #fbfbfd;
  --border: #d2d2d7;
  --border-soft: #e8e8ed;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.2s ease;
  --max-width: 1280px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--bg-secondary); color: var(--text-primary); -webkit-font-smoothing: antialiased; }
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.55;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

/* Navbar */
.navbar {
  background: var(--primary);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar-container {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 56px;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 0 24px;
}
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-light);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.navbar-logo:hover { color: var(--text-light); opacity: 0.9; }
.navbar-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.25);
}
.navbar-spacer { flex: 1; }
.navbar-search input {
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-sm);
  color: #fff;
  font: inherit;
  font-size: 14px;
  outline: none;
  padding: 8px 14px;
  transition: var(--transition);
  width: 260px;
}
.navbar-search input::placeholder { color: rgba(255, 255, 255, 0.7); }
.navbar-search input:focus {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.5);
  width: 320px;
}

/* Page */
.main-content {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 32px 24px 80px;
}
.page-header { margin-bottom: 32px; }
.page-eyebrow {
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.page-header h1 {
  color: var(--text-primary);
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
}
.page-lead {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 760px;
}

/* Stat row (Kennzahlen unter Modul-Heading) */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin: 20px 0 24px;
}
.stat-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-number {
  color: var(--primary);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.stat-label {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
}

/* Lektionen */
.lektionen {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.lektion {
  background: var(--bg-primary);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}
.lektion:hover { box-shadow: var(--shadow-md); }
.lektion-header {
  background: linear-gradient(135deg, #fff 0%, var(--bg-tertiary) 100%);
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 28px;
}
.lektion-eyebrow {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.lektion-eyebrow .lektion-number {
  color: var(--primary);
  font-weight: 700;
  margin-left: 4px;
}
.lektion-title {
  color: var(--text-primary);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 2px;
}
.lektion-meta {
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  font-size: 13px;
  gap: 16px;
  margin-top: 6px;
}
.lektion-meta span strong {
  color: var(--text-primary);
  font-weight: 600;
}
.lz-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  padding: 20px 28px 28px;
}
.lz-card {
  align-items: flex-start;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px;
  text-align: left;
  transition: var(--transition);
  width: 100%;
}
.lz-card:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.lz-card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.lz-card-code {
  background: var(--primary-soft);
  border-radius: 999px;
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 3px 10px;
  text-transform: uppercase;
}
.lz-card-text {
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.45;
}
.lz-card-meta {
  color: var(--text-secondary);
  display: flex;
  font-size: 12px;
  gap: 12px;
  margin-top: auto;
  padding-top: 6px;
}
.lz-card-meta span { display: inline-flex; align-items: center; gap: 4px; }
.lz-card-meta strong { color: var(--text-primary); font-weight: 600; }

/* Dialog */
.lz-dialog {
  background: var(--bg-primary);
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-height: calc(100vh - 48px);
  max-width: 720px;
  padding: 0;
  width: calc(100vw - 32px);
}
.lz-dialog::backdrop { background: rgba(29, 29, 31, 0.45); backdrop-filter: blur(4px); }
.lz-dialog article { padding: 28px 32px 32px; max-height: calc(100vh - 48px); overflow-y: auto; }
.lz-dialog-header {
  align-items: flex-start;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 20px;
}
.lz-dialog-eyebrow {
  background: var(--primary-soft);
  border-radius: 999px;
  color: var(--primary);
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  padding: 3px 10px;
  text-transform: uppercase;
}
.lz-dialog-header h2 {
  color: var(--text-primary);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.lz-dialog-close {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-secondary);
  cursor: pointer;
  flex-shrink: 0;
  font-size: 22px;
  font-weight: 400;
  height: 32px;
  line-height: 1;
  margin-left: auto;
  transition: var(--transition);
  width: 32px;
}
.lz-dialog-close:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }
.lz-dialog-text {
  color: var(--text-primary);
  font-size: 15px;
  margin-bottom: 24px;
}

.lz-block { margin-top: 24px; }
.lz-block h3 {
  align-items: center;
  color: var(--text-primary);
  display: flex;
  font-size: 14px;
  font-weight: 600;
  gap: 10px;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.lz-block-icon {
  align-items: center;
  background: var(--primary);
  border-radius: 6px;
  color: #fff;
  display: inline-flex;
  font-size: 11px;
  font-weight: 700;
  height: 22px;
  justify-content: center;
  width: 22px;
}
.lz-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  list-style: none;
}
.lz-list li a {
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  display: flex;
  font-size: 14px;
  gap: 10px;
  padding: 11px 14px;
  transition: var(--transition);
}
.lz-list li a:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--text-primary);
  transform: translateX(2px);
}
.lz-list .lz-item-text { flex: 1; }
.lz-list .lz-item-arrow {
  color: var(--text-secondary);
  font-size: 16px;
  transition: var(--transition);
}
.lz-list li a:hover .lz-item-arrow { color: var(--primary); transform: translateX(2px); }
.lz-list-empty { color: var(--text-secondary); font-size: 14px; font-style: italic; padding: 4px 0; }

.page-footer {
  border-top: 1px solid var(--border-soft);
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: 64px;
  padding-top: 24px;
  text-align: center;
}

.hidden { display: none !important; }

@media (max-width: 720px) {
  .page-header h1 { font-size: 32px; }
  .lektion-header { padding: 16px 20px; }
  .lz-grid { padding: 16px 20px 20px; }
  .navbar-search input { width: 160px; }
  .navbar-search input:focus { width: 200px; }
  .lz-dialog article { padding: 20px 22px 24px; }
}