/* Bright, two-column layout + better grid and drawing tools */
:root {
  --bg: #f7fafc;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --grid: #d1d5db;              /* ベースグリッド */
  --grid-transformed: #93c5fd;  /* 変換後グリッド */
  --axis: #374151;
  --shape0: #334155;
  --shape1: #059669;
  --basisX: #ef4444;
  --basisY: #3b82f6;
  --tool: #111827;
  --tool-bg: #f3f4f6;
  --active: #2563eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.6;
}

a { color: var(--accent); }

.site-header, .site-footer {
  padding: 24px;
  text-align: center;
  background: linear-gradient(180deg, #ffffff 0%, #f3f4f6 100%);
  border-bottom: 1px solid #e5e7eb;
}

.container {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 18px;
  margin: 18px 0;
  box-shadow: 0 6px 18px rgba(0,0,0,.06);
}

/* === キャンバス左／パネル右の2カラム === */
.viz-wrap {
  display: grid;
  grid-template-columns: 1fr 340px; /* 左：SVG、右：サイド */
  gap: 14px;
}
@media (max-width: 980px) {
  .viz-wrap { grid-template-columns: 1fr; }
}

.tools {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  background: var(--tool-bg);
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 10px;
  margin-bottom: 10px;
}
.tools label { color: var(--tool); }
.tools button {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  background: #ffffff;
  cursor: pointer;
}
.tools button:hover { background: #f9fafb; }
.tools button.active {
  border-color: var(--active);
  box-shadow: 0 0 0 2px rgba(37,99,235,.15) inset;
}

/* ==== パラメーター行を 横並び（タイトル / スライダー / テキスト）に ==== */
.controls {
  display: grid;
  gap: 10px;
}
.control-row {
  display: grid;
  grid-template-columns: 140px 1fr 110px; /* タイトル / スライダー / テキスト */
  gap: 8px;
  align-items: center;
}
.control-row label { color: var(--muted); }
.control-row input[type="range"] { width: 100%; }
.control-row input[type="number"] {
  width: 100%;
  padding: 6px 8px;
  background: #ffffff;
  color: var(--text);
  border: 1px solid #d1d5db;
  border-radius: 8px;
}

/* 小さい画面では2列に崩す */
@media (max-width: 520px) {
  .control-row { grid-template-columns: 1fr 1fr; }
  .control-row input[type="number"] { grid-column: 1 / -1; }
}

aside .legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 12px;
  margin-top: 10px;
  font-size: 14px;
  color: var(--muted);
}
.legend i {
  display: inline-block; width: 16px; height: 3px; background: #111827; border-radius: 2px;
}

/* 行列はグリッドの下に横並び */
.matrix-tables {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 1fr);
  gap: 12px;
}
@media (max-width: 980px) {
  .matrix-tables { grid-auto-flow: row; }
}
.matrix-table {
  border-collapse: collapse;
  width: 100%;
}
.matrix-table caption {
  font-weight: 600;
  margin-bottom: 6px;
  text-align: left;
}
.matrix-table th, .matrix-table td {
  border: 1px solid #e5e7eb;
  padding: 6px 8px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.matrix-table th { background: #f3f4f6; color: var(--muted); }

svg {
  width: 100%;
  height: 560px;
  background: #ffffff;
  border-radius: 12px;
  user-select: none;
}
.hit-rect { fill: transparent; pointer-events: all; } /* クリックを確実に取る */

.grid line { stroke: var(--grid); stroke-width: 1; }
.grid-transformed path { stroke: var(--grid-transformed); stroke-width: 1.4; fill: none; }
.axis line, .axis path { stroke: var(--axis); }

.shape-original { fill: rgba(51,65,85,.06); stroke: var(--shape0); stroke-width: 2; }
.shape-transformed { fill: rgba(5,150,105,.08); stroke: var(--shape1); stroke-width: 2; }

.vector { stroke-width: 3; }
.vector.x { stroke: var(--basisX); }
.vector.y { stroke: var(--basisY); }
.pivot { fill: #eab308; stroke: #f59e0b; stroke-width: 2; }

/* 手描き */
.user-line   { stroke: #111827; stroke-width: 2.2; }
.user-line-t { stroke: #10b981; stroke-width: 2.2; }
.user-circle   { stroke: #111827; stroke-width: 2; fill: none; }
.user-circle-t { stroke: #10b981; stroke-width: 2; fill: rgba(16,185,129,.06); }
.user-rect     { stroke: #111827; stroke-width: 2; fill: none; }
.user-rect-t   { stroke: #10b981; stroke-width: 2; fill: rgba(16,185,129,.06); }
.user-free   { stroke: #111827; stroke-width: 2; fill: none; }
.user-free-t { stroke: #10b981; stroke-width: 2; fill: none; }

.hint { color: var(--muted); font-size: 12px; }