:root {
  --bg-color: #0f172a;
  --panel-bg: #1e293b;
  --panel-bg-hover: #273549;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --border-color: #334155;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #22c55e;
  --success-hover: #16a34a;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.5), 0 2px 4px -2px rgb(0 0 0 / 0.5);
  --radius: 8px;
}

[data-theme="light"] {
  --bg-color: #f8fafc;
  --panel-bg: #ffffff;
  --panel-bg-hover: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --success: #16a34a;
  --success-hover: #15803d;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  margin-bottom: 2rem;
  text-align: center;
}

.theme-toggle {
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow);
}

.theme-toggle:hover {
  background: var(--panel-bg-hover);
  color: var(--primary);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(to right, #60a5fa, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.header-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.panel {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

h2 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.toggle-header {
  cursor: pointer;
  user-select: none;
}

.toggle-header:hover .toggle-btn {
  color: var(--primary);
}

.panel-content {
  display: block;
}

.panel-content.collapsed {
  display: none;
}

.toggle-btn {
  transition: transform 0.3s ease;
  pointer-events: none;
}

.toggle-header.collapsed .toggle-btn {
  transform: rotate(180deg);
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

input[type="text"],
input[type="number"],
input[type="date"] {
  width: 100%;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 1rem;
  transition: border-color 0.2s;
  font-family: inherit;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

input::placeholder {
  color: #475569;
}

.row {
  display: flex;
  gap: 1rem;
}

.col {
  flex: 1;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

button.secondary {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

button.secondary:hover {
  background-color: var(--panel-bg-hover);
}

button.danger {
  background-color: var(--danger);
}

button.danger:hover {
  background-color: var(--danger-hover);
}

button.success {
  background-color: var(--success);
}

button.success:hover {
  background-color: var(--success-hover);
}

/* Raten Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  font-weight: 500;
  color: var(--text-muted);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:hover td {
  background-color: var(--panel-bg-hover);
}

.text-right {
  text-align: right;
}

.rate-actions {
  display: flex;
  justify-content: flex-end;
}

.btn-icon {
  padding: 0.4rem;
  background: transparent;
  color: var(--text-muted);
  border: none;
}

.btn-icon:hover {
  background: transparent;
  color: var(--danger);
  transform: none;
}

.btn-icon svg {
  width: 18px;
  height: 18px;
}

.add-rate-form {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  background-color: var(--bg-color);
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.add-rate-form .form-group {
  margin-bottom: 0;
  flex: 1;
}

.actions-bar {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

/* Ergebnisse */
.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.result-card {
  background-color: var(--panel-bg-hover);
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  text-align: center;
}

.result-card .label {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-card .value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
}

.result-card.highlight .value {
  color: #c084fc;
}

/* Tilgungsplan */
.plan-table {
  font-size: 0.9rem;
}

.plan-table th, .plan-table td {
  padding: 0.5rem 1rem;
}

.type-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.type-start { background-color: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.type-rate { background-color: rgba(34, 197, 94, 0.2); color: #4ade80; }
.type-end { background-color: rgba(192, 132, 252, 0.2); color: #c084fc; }

@media screen {
  .print-only { display: none !important; }
}

/* Print Styles */
@media print {
  @page { margin: 1.5cm 3cm; }
  body {
    background-color: white;
    color: black;
    font-size: 10pt;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }

  /* Hide UI elements */
  .container > header, 
  .panel:not(#resultSection),
  .results-grid,
  .actions-bar,
  .add-rate-form,
  .rate-actions,
  button,
  .col-ereignis,
  .plan-table td:nth-child(2), /* Ereignis column data */
  #guthabenWarning {
    display: none !important;
  }

  .panel {
    background: none;
    border: none;
    box-shadow: none;
    padding: 0;
    margin: 0;
  }
  
  h2 { display: none; } /* Hide 'Tilgungsplan & Ergebnisse' heading */

  .print-only { display: block !important; }
  
  /* Header Layout */
  .print-header-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
  }
  
  .print-logo {
    display: flex;
    align-items: center;
  }
  
  .print-logo-img {
    height: 45px;
    filter: grayscale(100%);
  }
  
  .print-meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
    font-size: 10pt;
  }
  
  .meta-row {
    margin-bottom: 0.5rem;
    display: flex;
  }
  
  .meta-label {
    width: 230px;
    font-weight: bold;
    flex-shrink: 0;
  }
  
  .meta-date {
    width: 80px;
    display: inline-block;
  }

  .print-hr {
    border: 0;
    border-top: 1px solid #000;
    margin-bottom: 1.5rem;
  }

  table.plan-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
  }

  .plan-table th {
    border-bottom: 1px solid #000;
    padding: 0.5rem;
    text-align: left;
    color: black;
    font-weight: bold;
    text-transform: none;
    letter-spacing: normal;
  }
  
  .plan-table th.text-right {
    text-align: right;
  }

  .plan-table td, .plan-table td * {
    border: none;
    padding: 0.5rem;
    color: black !important;
  }
  
  .text-right { text-align: right; }
  
  #printFooter {
    text-align: right;
    margin-top: 2rem;
    font-size: 10pt;
  }
  
  .footer-inner {
    display: inline-block;
  }
  
  .footer-value {
    font-weight: bold;
    text-decoration: underline;
    margin-left: 2rem;
  }
}