/* mamolii graph-calc-jp */
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; height: 100%;
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", Meiryo, system-ui, sans-serif;
  color: #1c2733;
}
#app {
  display: flex; height: 100vh; overflow: hidden;
}

/* ---------- 左パネル(式リスト) ---------- */
#panel {
  width: 340px; min-width: 280px;
  background: #ffffff;
  border-right: 1px solid #d9dee5;
  display: flex; flex-direction: column;
}
#panel-header {
  padding: 10px 14px;
  border-bottom: 1px solid #e6e9ee;
  display: flex; align-items: center; gap: 8px;
}
#panel-header h1 {
  font-size: 16px; margin: 0; font-weight: 700; letter-spacing: 0.02em;
}
#panel-header h1 span { color: #2d70b3; }
#panel-header .spacer { flex: 1; }
#panel-header a {
  font-size: 12px; color: #2d70b3; text-decoration: none;
  border: 1px solid #bcd2e8; border-radius: 6px; padding: 4px 8px;
}
#panel-header a:hover { background: #eef4fb; }

#expr-list {
  list-style: none; margin: 0; padding: 6px 8px 60px;
  overflow-y: auto; flex: 1;
}
.expr-row, .slider-row {
  border-radius: 8px;
  padding: 6px 6px 4px;
  margin-bottom: 2px;
}
.expr-row:hover, .slider-row:hover { background: #f4f6f9; }
.expr-row.row-error { background: #fdf0ef; }
.expr-row.row-hint { background: #f6f9ff; }
.expr-row.row-hidden .expr-input, .expr-row.row-hidden .expr-preview { opacity: 0.4; }

.expr-main { display: flex; align-items: center; gap: 4px; }
.color-dot {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid rgba(0,0,0,0.12); flex: none;
  cursor: pointer; padding: 0;
}
.expr-input {
  flex: 1; min-width: 0;
  border: 1px solid transparent; border-radius: 6px;
  font-size: 15px; padding: 5px 6px;
  font-family: inherit;
  background: transparent;
}
.expr-input:focus { outline: none; background: #fff; border-color: #9ec3e8; }
.vis-btn, .del-btn, .play-btn, .gear-btn {
  border: none; background: transparent; cursor: pointer;
  font-size: 14px; color: #7a8794; flex: none; padding: 3px 4px; border-radius: 4px;
}
.vis-btn:hover, .del-btn:hover, .play-btn:hover, .gear-btn:hover { background: #e3e8ee; color: #1c2733; }

.expr-preview {
  min-height: 20px; padding: 1px 6px 3px 28px;
  font-size: 15px; color: #1c2733;
  overflow-x: auto; white-space: nowrap;
}
.expr-preview:empty { display: none; }
.expr-msg {
  padding: 0 6px 4px 28px;
  font-size: 12px; color: #c74440;
}
.expr-row.row-hint .expr-msg { color: #2d70b3; }
.expr-msg:empty { display: none; }

#panel-footer {
  padding: 10px 12px;
  border-top: 1px solid #e6e9ee;
}
#btn-add {
  width: 100%; padding: 10px;
  border: 1px solid #bcd2e8; background: #eef4fb; color: #2d70b3;
  border-radius: 8px; font-size: 14px; cursor: pointer;
}
#btn-add:hover { background: #e2edf9; }

/* スライダー行 */
.slider-row { background: #f7f9fc; border: 1px solid #e2e8f0; }
.slider-head { display: flex; align-items: center; gap: 6px; padding: 0 2px; }
.slider-label { font-size: 15px; flex: 1; }
.slider-value { font-weight: 600; }
.slider-range {
  width: 100%; accent-color: #2d70b3; margin: 2px 0 6px;
}

/* ---------- 数式プレビュー ---------- */
.mgroup { white-space: nowrap; }
.mop { padding: 0 1px; }
.mvar.mvar-alias {
  font-weight: 700;
  border-bottom: 2px dotted currentColor;
}
.mfrac {
  display: inline-flex; flex-direction: column;
  vertical-align: -0.55em; text-align: center;
  margin: 0 2px; font-size: 0.85em;
}
.mnum-part { border-bottom: 1px solid currentColor; padding: 0 3px; }
.mden-part { padding: 0 3px; }
.msup { font-size: 0.72em; }
.mradical { font-size: 1.05em; }
.msqrt-body { border-top: 1.2px solid currentColor; padding: 0 2px 0 1px; margin-left: -1px; }
.mabs .mbar { padding: 0 1px; }
.merr { color: #c74440; }

/* ---------- ポップオーバー ---------- */
.popover {
  position: fixed; z-index: 50;
  background: #fff; border: 1px solid #d0d7e0; border-radius: 10px;
  box-shadow: 0 6px 24px rgba(20,35,55,0.18);
  padding: 10px; width: 220px;
  display: flex; flex-direction: column; gap: 6px;
}
.popover-title { font-size: 13px; font-weight: 700; color: #445; }
.popover-field { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 13px; }
.popover-field input {
  width: 110px; padding: 4px 6px; border: 1px solid #c4ccd6; border-radius: 6px; font-size: 13px;
}
.popover-note { font-size: 11px; color: #67727e; line-height: 1.5; }
.palette { display: flex; gap: 6px; padding: 2px 0 6px; }
.palette-dot {
  width: 22px; height: 22px; border-radius: 50%; border: 2px solid rgba(0,0,0,0.12); cursor: pointer;
}
.style-btn {
  text-align: left; padding: 6px 8px; font-size: 13px;
  background: #f4f6f9; border: 1px solid #dde3ea; border-radius: 6px; cursor: pointer;
}
.style-btn:hover { background: #e8edf3; }

/* ---------- グラフ領域 ---------- */
#canvas-wrap {
  flex: 1; position: relative; min-width: 0;
  background: #fff;
}
#graph-canvas { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; cursor: crosshair; }

#toolbar {
  position: absolute; right: 14px; bottom: 14px;
  display: flex; flex-direction: column; gap: 6px;
}
#toolbar button {
  width: 40px; height: 40px; border-radius: 8px;
  border: 1px solid #cfd6df; background: #fff;
  font-size: 17px; cursor: pointer; color: #33404d;
  box-shadow: 0 1px 3px rgba(20,35,55,0.12);
}
#toolbar button:hover { background: #f0f4f8; }

#angle-badge {
  position: absolute; left: 14px; bottom: 14px;
  font-size: 12px; color: #5a6673;
  background: rgba(255,255,255,0.85);
  border: 1px solid #d9dee5; border-radius: 6px; padding: 4px 8px;
}

.trace-tip {
  position: absolute; z-index: 10; pointer-events: none;
  background: #22303e; color: #fff; font-size: 12px;
  border-radius: 6px; padding: 3px 8px;
  transform: translate(0, 0); white-space: nowrap;
}

#hint-toast {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
  background: #22303e; color: #fff; font-size: 13px;
  border-radius: 8px; padding: 8px 14px; display: none; z-index: 20;
  max-width: 80%;
}

/* ---------- モバイル ---------- */
#panel-toggle { display: none; }
@media (max-width: 720px) {
  #app { position: relative; }
  #panel {
    position: absolute; z-index: 30; inset: 0 auto 0 0;
    width: 88vw; max-width: 340px;
    box-shadow: 4px 0 24px rgba(20,35,55,0.25);
    transform: translateX(-102%);
    transition: transform 0.2s ease;
  }
  #panel.open { transform: none; }
  #panel-toggle {
    display: block; position: absolute; z-index: 31; top: 10px; left: 10px;
    border: 1px solid #cfd6df; background: #fff; border-radius: 8px;
    padding: 8px 12px; font-size: 14px; cursor: pointer;
    box-shadow: 0 1px 4px rgba(20,35,55,0.15);
  }
}

/* 数式の見た目と入力補助 */
.expr-preview { font-size: 21px; min-height: 32px; padding-top: 5px; }
.math-active { box-shadow: inset 3px 0 #2d70b3; background: #f0f6fc; }
#panel-footer { max-height: 50vh; overflow-y: auto; flex-shrink: 0; }
.math-keyboard-toggle { width: 100%; margin-top: 8px; padding: 8px; border: 1px solid #bcd2e8; border-radius: 6px; background: white; color: #245b90; cursor: pointer; }
.math-input-help { font-size: 11px; line-height: 1.5; color: #526477; margin: 8px 0; }
.math-keys { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 4px; }
.math-keys button { min-width: 0; min-height: 36px; border: 1px solid #ccd7e3; border-radius: 5px; background: #f4f7fb; color: #20364c; font-size: 15px; cursor: pointer; touch-action: manipulation; }
.math-keys button:hover { background: #dceafa; }
.math-keys button:focus-visible { outline: 2px solid #2d70b3; outline-offset: 1px; }
@media (max-height: 600px) { .math-keys button { min-height: 30px; } }
.math-keys button { white-space: nowrap; }
.math-keys button[aria-label="式を消去"] { font-size: 12px; padding: 1px; }
#expr-list { min-height: 0; }