/* Antenna PSF Applet - Modern UI */

:root {
  --bg: #f8f9fa;
  --card: #ffffff;
  --accent: #4361ee;
  --accent-hover: #3451d1;
  --danger: #e63946;
  --text: #1a1a2e;
  --text-muted: #6c757d;
  --border: #dee2e6;
  --radius: 10px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 20px;
  min-width: 320px;
}

header {
  margin-bottom: 16px;
}

header h1 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
}

/* Controls panel */
#controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 20px;
  background: var(--card);
  padding: 16px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.control-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-section h3 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin: 0;
}

.control-section summary {
  cursor: pointer;
  list-style: none;
}

.control-section summary::-webkit-details-marker {
  display: none;
}

.control-section summary h3::after {
  content: ' \25BE';
}

details.control-section[open] summary h3::after {
  content: ' \25B4';
}

.control-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

#controls label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
}

.checkbox-label {
  cursor: pointer;
}

#controls input[type="number"],
#controls select {
  font-family: inherit;
  font-size: 13px;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  width: 5.5em;
  transition: border-color 0.15s;
}

#controls input[type="number"]:focus,
#controls select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
}

#controls input[type="checkbox"] {
  accent-color: var(--accent);
}

/* Buttons */
#controls button {
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  transition: background 0.15s, box-shadow 0.15s;
}

#controls button:hover {
  background: var(--accent-hover);
}

#controls button:active {
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
}

#remove-all-btn {
  background: var(--danger);
}

#remove-all-btn:hover {
  background: #c5303c;
}

.toggle-btn {
  background: #e9ecef !important;
  color: var(--text) !important;
}

.toggle-btn:hover {
  background: #dee2e6 !important;
}

.toggle-btn.active {
  background: var(--danger) !important;
  color: #fff !important;
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  background: #e8eaff;
  color: var(--accent);
}

/* Plots layout */
#plots {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--card);
  padding: 12px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel h2 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

#antenna-canvas,
#uv-canvas {
  width: 400px;
  height: 400px;
}

canvas {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  display: block;
}

#psf-canvas,
#conv-canvas {
  width: 400px;
  height: 400px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}

#grid-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

#conv-image-select {
  font-family: inherit;
  font-size: 13px;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
}

/* PSF spinner overlay */
.psf-wrapper {
  position: relative;
}

#psf-spinner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 6px;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Responsive breakpoints */
@media (max-width: 1400px) {
  #plots {
    flex-wrap: wrap;
  }
}

@media (max-width: 800px) {
  body {
    padding: 10px;
  }

  #plots {
    flex-direction: column;
    align-items: center;
  }

  .panel {
    width: 100%;
    max-width: 420px;
  }

  #antenna-canvas,
  #uv-canvas,
  #psf-canvas,
  #conv-canvas {
    width: 100%;
    max-width: 400px;
    height: auto;
    aspect-ratio: 1;
  }

  #controls {
    flex-direction: column;
  }
}