:root {
  --bg: #0f1220;
  --panel: #1a1f36;
  --panel-2: #232a4a;
  --text: #e8eaf5;
  --muted: #9aa3c7;
  --accent: #6ee7f0;
  --accent-2: #b78cff;
  --border: #2d3563;
  --good: #59d98a;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, #1c2450 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100vh;
}

.app-header {
  padding: 1.4rem 1.6rem 0.4rem;
  text-align: center;
}
.app-header h1 { margin: 0; font-size: 1.7rem; letter-spacing: 0.3px; }
.tagline { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.95rem; }

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1.2rem;
  padding: 1.2rem 1.6rem 2rem;
  align-items: start;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.controls { position: sticky; top: 1rem; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--panel-2);
  padding: 1.4rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  margin-bottom: 1rem;
}
.dropzone:hover, .dropzone:focus { border-color: var(--accent); outline: none; }
.dropzone.drag { border-color: var(--accent-2); background: #2a3160; }
.dropzone.has-image { padding: 0.6rem; }
.dz-inner { display: flex; flex-direction: column; align-items: center; gap: 0.4rem; }
.dz-icon { font-size: 2rem; }
.dz-text { color: var(--muted); line-height: 1.35; }
.dz-thumb { max-width: 100%; max-height: 160px; border-radius: 8px; }

.control-group { margin: 0.85rem 0; }
.control-group > label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 0.35rem; }
.val { color: var(--accent); font-weight: 600; }
input[type="range"] { width: 100%; accent-color: var(--accent-2); }
select {
  width: 100%; padding: 0.45rem 0.5rem; border-radius: 8px;
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
}
.field-note { display: block; margin-top: 0.3rem; color: var(--muted); font-size: 0.74rem; line-height: 1.3; }
.checkbox { display: flex; align-items: center; gap: 0.4rem; margin-top: 0.5rem; color: var(--muted); font-size: 0.82rem; }
.checkbox input { accent-color: var(--accent-2); }

button {
  font: inherit; cursor: pointer; border-radius: 9px; border: 1px solid var(--border);
  padding: 0.55rem 0.9rem; transition: transform 0.05s, filter 0.15s, background 0.15s;
}
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.primary {
  width: 100%; margin-top: 0.4rem; font-weight: 700; color: #08121a;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); border: none;
}
button.primary:not(:disabled):hover { filter: brightness(1.07); }
button.secondary { background: var(--panel-2); color: var(--text); }
button.secondary:hover { border-color: var(--accent); }

.status { min-height: 1.1em; margin: 0.6rem 0 0; font-size: 0.85rem; color: var(--muted); }
.status.busy { color: var(--accent); }
.status.done { color: var(--good); }
.status.err { color: #ff8a8a; }

.export-bar { display: flex; gap: 0.5rem; margin-top: 0.9rem; flex-wrap: wrap; }
.export-bar button { flex: 1 1 auto; }

.tabs { display: flex; gap: 0.3rem; border-bottom: 1px solid var(--border); margin-bottom: 0.9rem; }
.tab {
  background: transparent; border: none; border-bottom: 2px solid transparent;
  color: var(--muted); padding: 0.5rem 0.8rem; border-radius: 0;
}
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.canvas-wrap { text-align: center; }
canvas { max-width: 100%; border-radius: 8px; background: #fff; image-rendering: pixelated; }

.chart-toolbar { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.6rem; flex-wrap: wrap; }
.chart-toolbar .hint { margin: 0 0 0 auto; }
.mini {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  padding: 0.3rem 0.7rem; min-width: 34px; font-weight: 600;
}
.mini:hover { border-color: var(--accent); }
.zoom-label { min-width: 48px; text-align: center; color: var(--muted); font-size: 0.85rem; font-variant-numeric: tabular-nums; }

.chart-viewport {
  position: relative; width: 100%; height: 70vh; overflow: hidden;
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  cursor: grab; touch-action: none;
}
.chart-viewport.grabbing { cursor: grabbing; }
#chartCanvas {
  position: absolute; top: 0; left: 0; max-width: none; border-radius: 0;
  transform-origin: 0 0; image-rendering: pixelated; will-change: transform;
}

.meta, .hint { color: var(--muted); font-size: 0.85rem; margin: 0 0 0.7rem; }

.summary {
  display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem;
}
.summary .card {
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 0.6rem 0.9rem; min-width: 120px;
}
.summary .card b { display: block; font-size: 1.25rem; color: var(--accent); }
.summary .card span { font-size: 0.78rem; color: var(--muted); }

.table-wrap { overflow: auto; max-height: 62vh; border: 1px solid var(--border); border-radius: 8px; }
table { border-collapse: collapse; width: 100%; font-size: 0.86rem; }
th, td { padding: 0.4rem 0.6rem; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
thead th { position: sticky; top: 0; background: var(--panel-2); z-index: 1; }
td.sym { font-weight: 700; font-family: "Consolas", monospace; text-align: center; }
.swatch { width: 22px; height: 22px; border-radius: 5px; border: 1px solid rgba(255,255,255,0.25); display: inline-block; vertical-align: middle; }

.app-footer {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding: 0.8rem 1.6rem 1.6rem; color: var(--muted); font-size: 0.8rem;
}