:root{
  --bg:#eef1f6;
  --card:#ffffff;
  --text:#222;
  --accent:#4f7cff;
  --input:#f7f8fa;
  --warn:#d33;
  --font:"Comic Sans MS";
  --rampart-fix:0;
}

body.dark{
  --bg:#12141a;
  --card:#1e222b;
  --text:#f2f4f8;
  --input:#2b3040;
}

*{box-sizing:border-box}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
}

.app{max-width:1100px;margin:auto;padding:80px 20px}
.card{background:var(--card);border-radius:18px;padding:24px;position:relative;padding-bottom:80px;}

.clear-btn{
  position:absolute;
  right:20px;
  bottom:20px;
  background:#d32f2f;
  color:#fff;
  opacity:1;
}

.clear-btn:hover{
  opacity:1;
}


.controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

select,input,button{font-family:var(--font)}

select,input{
  background:var(--input);
  color:var(--text);
  border:none;
  border-radius:10px;
  padding:8px;
}

button{
  background:var(--accent);
  color:#fff;
  border:none;
  border-radius:12px;
  padding:10px 14px;
  cursor:pointer;
}

table{
  width:100%;
  border-collapse:collapse;
  margin-top:14px;
}

th,td{
  padding:8px;
  border-bottom:1px solid #ccc3;
  text-align:center;
  line-height:calc(1.4 - var(--rampart-fix)*0.2);
  letter-spacing:calc(0.02em - var(--rampart-fix)*0.02em);
}

.warn{color:var(--warn);font-weight:bold;display:none}

/* チェックボックス（✔付き） */
.chk{
  display:flex;
  align-items:center;
  gap:6px;
  cursor:pointer;
}

.chk input{
  appearance:none;
  width:16px;
  height:16px;
  border:2px solid var(--accent);
  border-radius:4px;
  position:relative;
}

.chk input:checked::after{
  content:"✔";
  position:absolute;
  inset:0;
  color:var(--accent);
  font-size:12px;
  text-align:center;
  line-height:14px;
}

/* テーマスイッチ */
.top-bar{
  display:flex;
  justify-content:flex-end;
  align-items:center;
  margin-bottom:12px;
}

.theme-switch{
  display:flex;
  align-items:center;
  gap:6px;
}

.theme-switch .icons{margin-bottom:6px}

.switch{position:relative;width:46px;height:24px;margin:auto}
.switch input{display:none}
.slider{position:absolute;inset:0;background:#999;border-radius:999px}
.slider::before{
  content:"";
  position:absolute;
  width:18px;height:18px;
  left:3px;top:3px;
  background:#fff;border-radius:50%;
  transition:.2s;
}
.switch input:checked + .slider{background:var(--accent)}
.switch input:checked + .slider::before{transform:translateX(22px)}

.settings-btn{
  position:fixed;
  right:20px;
  bottom:20px;
  width:56px;
  height:56px;
  border-radius:50%;
  background:var(--accent);
  color:#fff;
  font-size:26px;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}

.modal{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.4);
  display:none;
  align-items:center;
  justify-content:center;
}

.modal.show{display:flex}

.modal-content{
  background:var(--card);
  border-radius:16px;
  padding:20px;
  width:340px;
}