/* Professioneller, reduzierter Look mit hellem Grau im Light-Mode */
:root {
  /* Light */
  --bg: #eef1f3;
  --panel: #f6f7f9;
  --elevated: #eceff3;
  --border: #cfd6de;
  --text: #0f172a;
  --muted: #475569;
  --accent: #2563eb;
  --accent-contrast: #ffffff;
  --shadow: 0 8px 24px rgba(2, 6, 23, 0.08);
  --radius: 12px;
}

html[data-theme="dark"] {
  --bg: #0b0f14;
  --panel: #0f141a;
  --elevated: #121922;
  --border: #1f2a37;
  --text: #e5e7eb;
  --muted: #9aa4b2;
  --accent: #3b82f6;
  --accent-contrast: #0b0f14;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

/* Grundlayout */
html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.main-container { height: 100%; overflow: hidden; }

/* Sidebar und Header */
.toolbar-sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  width: 280px;
  height: 100%;
  overflow-y: auto;
  padding-top: 60px;
  z-index: 1000;
}

.app-header {
  position: fixed;
  top: 0;
  left: 280px;
  right: 0;
  height: 60px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

/* Arbeitsbereich */
.canvas-area {
  margin-left: 280px;
  background: var(--bg);
  height: calc(100vh - 60px);
  padding: 20px;
  padding-top: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

/* Canvas */
.canvas-wrapper {
  background: #ffffff; /* neutrale Zeichenfläche */
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 100%;
  max-height: 100%;
}

/* Tool-Sektionen */
.tool-section { border-bottom: 1px solid var(--border); padding: 14px 15px; }
.tool-section h6 { color: var(--muted); font-weight: 600; margin-bottom: 10px; }

.tool-section.collapsible .section-header {
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.tool-section .section-body { display: none; }
.tool-section .section-body.show { display: block; }
.tool-section .section-header .bi.bi-chevron-up { transition: transform 0.2s ease; }
.tool-section .section-header.collapsed .bi.bi-chevron-up { transform: rotate(180deg); }

/* Buttons */
.btn-burwitz-primary {
  background: var(--accent);
  color: var(--accent-contrast);
  border: 1px solid var(--accent);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.05s ease;
}
.btn-burwitz-primary:hover { background: #1d4ed8; border-color: #1d4ed8; }

.btn-burwitz-secondary,
.btn-outline-light {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.05s ease;
}
.btn-burwitz-secondary:hover,
.btn-outline-light:hover { background: var(--elevated); }

/* Werkzeug-Buttons */
.tool-btn { width: 100%; margin-bottom: 8px; text-align: left; display: flex; align-items: center; gap: 10px; }
.tool-btn i { width: 20px; text-align: center; }

/* Ebenen-Panel */
.layers-panel { max-height: 240px; overflow-y: auto; }
.layer-row {
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  transition: background 0.15s ease, border-color 0.2s ease;
  margin-bottom: 6px;
}
.layer-row.active { border-color: var(--accent); background: color-mix(in oklab, var(--accent) 12%, transparent); }
.layer-actions .btn { padding: 2px 6px; }

/* Dropdown, Modal, Auswahlboxen */
.app-header .dropdown-menu,
.modal-content { background: var(--panel); border: 1px solid var(--border); }

.dropdown-item { color: var(--text); }
.dropdown-item:hover,
.dropdown-item:focus { background-color: var(--elevated); }

.form-control,
.form-select,
.input-group-text {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
}
.form-control:hover,
.form-select:hover { background: var(--elevated); }
.form-control:focus,
.form-select:focus {
  background: var(--elevated);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
  border-color: var(--accent);
}

/* Icon-Grid im Modal */
.fa-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
}
.fa-grid .fa-item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, transform 0.05s, border-color 0.15s;
}
.fa-grid .fa-item:hover { background: var(--elevated); }
.fa-grid .fa-item:active { transform: translateY(1px); }
.fa-grid .fa-item i { font-size: 18px; line-height: 1; }

/* Footer */
.app-footer {
  position: fixed;
  left: 280px;
  right: 0;
  bottom: 0;
  height: 32px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  z-index: 1100;
}
.app-footer .footer-links {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
}
.app-footer .footer-links a {
  color: var(--muted);
  text-decoration: none;
}
.app-footer .footer-links a:hover {
  color: var(--text);
  text-decoration: underline;
}

/* Legal Modal Tabs */
#legalModal .nav-tabs .nav-link {
  color: var(--muted);
  border: 1px solid transparent;
}
#legalModal .nav-tabs .nav-link.active {
  color: var(--text);
  background: var(--elevated);
  border-color: var(--border);
}
#legalModal .table { color: var(--text); }
#legalModal .table thead th { border-bottom-color: var(--border); }
#legalModal .table td, 
#legalModal .table th { border-color: var(--border); }

/* Modal: dynamische Top-/Bottom-Margen relativ zur Viewport-Höhe */
#faIconModal,
#legalModal {
  --bs-modal-margin: clamp(24px, 8vh, 96px);
}

/* Header/Footer unter die Modals legen (Bootstrap Modal z-index ~1055) */
.app-header { z-index: 1040; }
.app-footer { z-index: 1040; }

/* Optional: bei sehr kleinen Höhen noch etwas Luft unten */
@media (max-height: 640px) {
  #faIconModal, #legalModal { --bs-modal-margin: clamp(16px, 6vh, 72px); }
}


/* Responsive */
@media (max-width: 768px) {
  .toolbar-sidebar { width: 250px; }
  .app-header { left: 250px; height: 56px; }
  .canvas-area { margin-left: 250px; height: calc(100vh - 56px); padding-top: 56px; }
  .app-footer { left: 250px; }
}
@media (max-width: 576px) {
  .toolbar-sidebar { width: 100%; height: auto; position: relative; padding-top: 0; }
  .app-header { left: 0; position: fixed; height: 56px; }
  .canvas-area { margin-left: 0; height: calc(100vh - 56px); padding-top: 56px; }
  .app-footer { left: 0; }
}