/* ============================================================
   Nuklidkarte – Stylesheet
   Karlsruher Farbschema
   ============================================================ */

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

/* ---- Dark Mode (Standard) ---- */
:root {
  --toolbar-h:  52px;
  --bg:         #0d1117;
  --canvas-bg:  #0d1117;
  --toolbar-bg: #161b22;
  --border:     #30363d;
  --text:       #e6edf3;
  --text-muted: #8b949e;
  --accent:     #58a6ff;
  --panel-bg:   #161b22;
  --grid-line:  rgba(48,54,61,0.5);
  --axis-color: rgba(139,148,158,0.8);
  --shadow:     0 8px 32px rgba(0,0,0,0.5);
}

/* ---- Light Mode ---- */
:root[data-theme="light"] {
  --bg:         #f5f5f0;
  --canvas-bg:  #f5f5f0;
  --toolbar-bg: #ffffff;
  --border:     #d0d7de;
  --text:       #1f2328;
  --text-muted: #656d76;
  --accent:     #0969da;
  --panel-bg:   #ffffff;
  --grid-line:  rgba(180,180,180,0.4);
  --axis-color: rgba(80,80,80,0.7);
  --shadow:     0 8px 32px rgba(0,0,0,0.15);
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  font-size: 14px;
}

/* ---- Toolbar ---- */
#toolbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--toolbar-h);
  background: var(--toolbar-bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 16px;
  z-index: 100;
}

#toolbar-left { display: flex; align-items: baseline; gap: 10px; flex-shrink: 0; }
#logo { font-size: 18px; font-weight: 700; color: var(--accent); letter-spacing: -0.5px; }
#subtitle { font-size: 12px; color: var(--text-muted); }

#toolbar-center { flex: 1; position: relative; max-width: 400px; }

#search-input {
  width: 100%;
  padding: 6px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  outline: none;
}
#search-input:focus { border-color: var(--accent); }

#search-results {
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  z-index: 200;
  display: none;
  max-height: 300px;
  overflow-y: auto;
}
#search-results.visible { display: block; }
.search-result-item {
  padding: 8px 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: #21262d; }
.search-color-dot {
  width: 12px; height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
}
.search-result-name { font-weight: 600; }
.search-result-info { color: var(--text-muted); font-size: 12px; margin-left: auto; }

#toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* Toggle Switch */
.toggle-label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 12px; }
.toggle-switch { position: relative; display: inline-block; width: 40px; height: 22px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0;
  background: #30363d;
  border-radius: 22px;
  transition: background 0.2s;
  cursor: pointer;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 16px; height: 16px;
  left: 3px; top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}
input:checked + .toggle-slider { background: var(--accent); }
input:checked + .toggle-slider::before { transform: translateX(18px); }

#toolbar-right button {
  width: 30px; height: 30px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.15s, background 0.2s, color 0.2s;
}
#toolbar-right button:hover { border-color: var(--accent); color: var(--accent); }
#btn-theme { font-size: 18px; }

/* ---- Canvas Container ---- */
#canvas-container {
  position: fixed;
  top: var(--toolbar-h);
  left: 0; right: 0; bottom: 0;
  overflow: hidden;
}

#nuclide-canvas {
  display: block;
  cursor: grab;
}
#nuclide-canvas.grabbing { cursor: grabbing; }

/* ---- Loading Overlay ---- */
#loading-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  transition: opacity 0.4s;
}
#loading-overlay.hidden { opacity: 0; pointer-events: none; }

#loading-box { text-align: center; }
#loading-spinner {
  width: 48px; height: 48px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }
#loading-text { color: var(--text-muted); font-size: 14px; }

/* ---- Achsen ---- */
#axis-n {
  position: fixed;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 10;
}
#axis-z {
  position: fixed;
  left: 8px;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  font-size: 11px;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 10;
  white-space: nowrap;
}

/* ---- Legende ---- */
#legend {
  position: fixed;
  bottom: 28px;
  right: 12px;
  background: rgba(22,27,34,0.92);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  z-index: 20;
  backdrop-filter: blur(6px);
  min-width: 180px;
}
.legend-title { font-size: 11px; font-weight: 700; text-transform: uppercase;
                letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: 8px; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 12px; margin-bottom: 5px; }
.legend-item-small { font-size: 11px; color: var(--text-muted); }
.legend-color { width: 14px; height: 14px; border-radius: 2px; flex-shrink: 0; }
.legend-divider { border-top: 1px solid var(--border); margin: 6px 0; }

/* ---- Koordinatenanzeige ---- */
#coords-display {
  position: fixed;
  bottom: 8px;
  left: 50px;
  font-size: 11px;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 10;
  font-family: monospace;
}

/* ---- Detail-Panel ---- */
#detail-panel {
  position: fixed;
  top: calc(var(--toolbar-h) + 12px);
  right: 12px;
  width: 340px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  z-index: 90;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  max-height: calc(100vh - var(--toolbar-h) - 24px);
  overflow-y: auto;
  transition: transform 0.2s, opacity 0.2s;
}
#detail-panel.hidden { display: none; }

#detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--panel-bg);
  z-index: 1;
}

#detail-symbol-box {
  width: 60px; height: 60px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  flex-shrink: 0;
  position: relative;
  background: var(--c-stable);
}
#detail-mass-number { font-size: 11px; position: absolute; top: 4px; left: 5px; }
#detail-z-number    { font-size: 11px; position: absolute; bottom: 4px; left: 5px; }
#detail-symbol      { font-size: 22px; }

#detail-name { font-size: 16px; font-weight: 700; flex: 1; }

#detail-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  flex-shrink: 0;
}
#detail-close:hover { color: var(--text); background: #21262d; }

#detail-body { padding: 14px; }

#detail-table { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
#detail-table td { padding: 5px 0; font-size: 13px; }
#detail-table td:first-child { color: var(--text-muted); width: 45%; }
#detail-table td:last-child { font-weight: 500; }

#detail-decay-modes { margin-bottom: 10px; }
#detail-decay-modes strong { font-size: 12px; text-transform: uppercase;
                              color: var(--text-muted); letter-spacing: 0.04em; }
#detail-decay-list { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 6px; }

.decay-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
}
.decay-intensity { font-weight: 400; opacity: 0.85; font-size: 11px; }

#detail-isomers { margin-top: 10px; }
#detail-isomers strong { font-size: 12px; text-transform: uppercase;
                          color: var(--text-muted); letter-spacing: 0.04em; }
#detail-isomers-list { margin-top: 6px; font-size: 13px; }

/* Schüler-Erklärungsbox */
#detail-student-box {
  margin-top: 12px;
  padding: 10px 12px;
  background: rgba(88, 166, 255, 0.08);
  border: 1px solid rgba(88, 166, 255, 0.2);
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.5;
}
#detail-student-box.hidden { display: none; }

/* ---- Tooltip am Cursor ---- */
#cursor-tooltip {
  position: fixed;
  background: rgba(22,27,34,0.95);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 12px;
  pointer-events: none;
  z-index: 80;
  display: none;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
#cursor-tooltip.visible { display: block; }
.tt-symbol { font-weight: 700; font-size: 14px; }
.tt-info { color: var(--text-muted); margin-top: 2px; }

/* ============================================================
   DRUCK-OVERLAY
   ============================================================ */
#print-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
#print-overlay.hidden { display: none; }

#print-panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: min(720px, 95vw);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}

#print-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0;
  background: var(--panel-bg);
  z-index: 1;
}
#print-title { font-size: 16px; font-weight: 700; }
#print-close {
  background: none; border: none; color: var(--text-muted);
  font-size: 18px; cursor: pointer; padding: 4px; border-radius: 4px;
}
#print-close:hover { color: var(--text); background: rgba(255,255,255,0.08); }

#print-body { padding: 20px; }

/* Tabs */
#print-mode-tabs { display: flex; gap: 4px; margin-bottom: 16px; }
.print-tab {
  padding: 7px 14px; border-radius: 6px; border: 1px solid var(--border);
  background: transparent; color: var(--text-muted); font-size: 13px;
  cursor: pointer; transition: all 0.15s;
}
.print-tab:hover { border-color: var(--accent); color: var(--text); }
.print-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

.print-hint { font-size: 13px; color: var(--text-muted); margin-bottom: 14px; line-height: 1.5; }

.print-options { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 4px; }
.print-options label { font-size: 13px; color: var(--text-muted); display: flex; flex-direction: column; gap: 5px; }
.print-options select,
.print-options input[type=number] {
  padding: 5px 8px; background: var(--bg); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text); font-size: 13px; width: 120px;
}

#print-selection-info {
  padding: 10px 14px; background: rgba(88,166,255,0.08);
  border: 1px solid rgba(88,166,255,0.2); border-radius: 6px;
  font-size: 13px; color: var(--text-muted);
}

/* Vorschau-Canvas */
#print-preview-wrap {
  margin: 16px 0;
  border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden;
  background: #fff;
  min-height: 80px;
  display: flex; align-items: center; justify-content: center;
}
#print-preview-canvas { display: block; max-width: 100%; height: auto; }

/* Aktions-Buttons */
#print-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.btn-primary {
  padding: 9px 20px; border-radius: 6px; border: none;
  background: var(--accent); color: #fff; font-size: 14px;
  font-weight: 600; cursor: pointer; transition: opacity 0.15s;
}
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary:not(:disabled):hover { opacity: 0.85; }
.btn-secondary {
  padding: 9px 20px; border-radius: 6px;
  border: 1px solid var(--border); background: transparent;
  color: var(--text); font-size: 14px; cursor: pointer; transition: border-color 0.15s;
}
.btn-secondary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-secondary:not(:disabled):hover { border-color: var(--accent); color: var(--accent); }

/* Auswahlrahmen auf Canvas */
#print-select-overlay {
  position: absolute; border: 2px dashed var(--accent);
  background: rgba(88,166,255,0.08);
  pointer-events: none; display: none;
}

/* Hinweisbanner während Bereich-Auswahl */
#print-select-banner {
  position: fixed;
  top: calc(var(--toolbar-h) + 12px);
  left: 50%; transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px; font-weight: 600;
  display: none; align-items: center; gap: 14px;
  z-index: 150;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  white-space: nowrap;
  pointer-events: all;
}
#print-select-banner.visible { display: flex; }
#print-banner-cancel {
  background: rgba(255,255,255,0.2); border: none;
  color: #fff; padding: 4px 12px; border-radius: 6px;
  cursor: pointer; font-size: 13px;
}
#print-banner-cancel:hover { background: rgba(255,255,255,0.35); }

/* @media print */
@media print {
  #toolbar, #legend, #detail-panel, #print-overlay,
  #axis-n, #axis-z, #coords-display, #cursor-tooltip { display: none !important; }
  #canvas-container { top: 0 !important; }
  body { background: white !important; }
}