/* 全体 */
body {
    margin: 0;
    font-family: sans-serif;
}

/* ヘッダー */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    border-bottom: 1px solid #ddd;
    position: relative;
}
    

/* ハンバーガーボタン */
#hamburger {
    width: 32px;
    height: 24px;
    border: none;
    background: none;
    cursor: pointer;
    position: relative;
    padding: 0;
    z-index: 2001;
}

/* 三本線 */
#hamburger::before,
#hamburger::after,
#hamburger span {
    content: "";
    position: absolute;
    left: 0;
    width: 32px;
    height: 3px;
    background: var(--text-color);
    transition: 0.3s;
}

#hamburger::before { top: 0; }
#hamburger span { top: 10px; }
#hamburger::after { top: 20px; }

/* ×に変形 */
#hamburger.active::before {
	transform: translateY(10px) rotate(45deg);
	background: var(--text-color);
}
#hamburger.active span { opacity: 0; }
#hamburger.active::after {
	transform: translateY(-10px) rotate(-45deg);
	background: var(--text-color);
}

/* メニュー */
.menu {
    position: fixed;
    top: 0;
    right: -250px;
    width: 250px;
    height: 100%;
    background: var(--card-color);
    box-shadow: -2px 0 5px rgba(0,0,0,0.2);
	border-left: 1px solid var(--border-color);
    transition: right 0.3s ease;
    padding-top: 60px;
    z-index: 1500;
}

.menu.open { right: 0; }

.menu ul { list-style: none; padding: 0; margin: 0; }
.menu li { padding: 15px; border-bottom: 1px solid var(--border-color); }
.menu a { text-decoration: none; color: var(--text-color); display: block; }

/* main余白 */
main { padding: 15px; }

.back-to-top {
	position: fixed;
	bottom: 30px;
	right: 30px;
	background-color: var(--accent-color);
	color: var(--text-color);
	width: 50px;
	height: 50px;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	text-decoration: none;
	font-size: 1.5em;
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
	transition: 0.3s;
	z-index: 1000;
}

.back-to-top:hover {
	background-color: var(--accent-dark);
	transform: translateY(-5px);
	box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.slider {
  width: 600px;      /* 好きな横幅 */
  height: 400px;     /* 好きな高さ */
  overflow: hidden;  /* はみ出し防止 */
}

#slide {
  width: 100%;
  height: 100%;
  object-fit: cover; /* ←重要 */
  transition: opacity 0.5s ease-in-out;
}

.fade-out {
  opacity: 0;
}

.error-list {
  color: red;
  list-style: none; /* 赤い点を消す */
  padding-left: 0;
}