/* 全体 */
body {
    font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
    margin: 0;
    padding: 0;
    background: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

/* ヘッダー */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    background: linear-gradient(90deg, #00aaff, #66ccff);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 10;
    height: 70px;
}

header h1 {
    margin: 0;
    font-size: 1.6rem;
    text-align: center;
    flex: 1;
}

header h1 a {
    text-decoration: none;
    color: #fff;
    font-weight: bold;
}

/* オーバーレイ */
#overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

/* オーバーレイ表示時 */
#overlay.show {
    opacity: 1;
    visibility: visible;
}

/* ハンバーガーボタン */
.menu-toggle {
    position: relative;
    width: 30px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 6px;
    cursor: pointer;
    z-index: 1002;
    padding: 5px 0;
}

.menu-toggle span {
    display: block;
    height: 4px;
    width: 100%;
    background: #fff;
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* active クラスで X に変化 */
.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* スライドインメニュー */
.navbar {
    display: flex;
    align-items: center;
    gap: 10px;
}

.menu {
    list-style: none;
    padding: 20px;
    margin: 0;
    position: fixed;
    top: 70px;
    right: 0;
    width: 250px;
    height: calc(100% - 70px);
    background: #f8f9fa;
    box-shadow: -2px 0 6px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    gap: 6px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 1001;
}

.menu li {
    margin: 3px 0;
}

.menu li a {
    text-decoration: none;
    color: #333;
    padding: 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.menu li a:hover {
    background: #e6e6e6;
}

/* 表示時 */
.menu.show {
    transform: translateX(0);
}

/* メイン */
main {
    padding: 1rem 1rem;
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

main h1 {
    text-align: center;
    margin-bottom: 1.2rem;
    color: #555;
}


main h2 {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 1.0rem;
    color: #555;
}

/* リンクリスト */
ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: block;
}

ul li {
    display: block;
    padding: 0.2em 0;
    margin: 0.5em 0;
}

ul li a {
    display: block;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    margin: 0 auto;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    text-decoration: none;
    text-align: center;
    color: #fff;
    background: #00aaff;
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 170, 255, 0.3);
}

ul li a:hover {
    background: #0088cc;
    box-shadow: 0 6px 12px rgba(0, 136, 204, 0.4);
    transform: translateY(-2px);
}

/* フッター */
footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.85rem;
    color: #666;
    border-top: 1px solid #ddd;
    margin-top: 2rem;
}

/* フォーム全体を中央寄せ */
form#rankForm {
    max-width: 400px;
    margin: 0 auto;
    padding: 1rem;
    background: #f0f8ff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* ラベルと入力を縦並びに揃える */
form#rankForm label,
form#rankForm input,
form#rankForm p {
    display: block;
    width: 100%;
    margin-bottom: 0.3rem;
}

/* 入力フィールド（テキストボックス・数値入力） */
form#rankForm input {
    padding: 0.7rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
    box-sizing: border-box;
}

/* フォーム内のpタグの下に区切り線 */
form#rankForm p {
    border-bottom: 1px solid #ccc;
    padding-bottom: 0.5rem;
    margin-bottom: 0.8rem;
}

/* フォーム内のspan文字を強調 */
form#rankForm span {
    font-weight: bold;
    background-color: #fff3e0;
    padding: 0 0.2rem;
    border-radius: 3px;
}


/* ボタンも中央寄せ */
form#rankForm button {
    display: block;
    margin: 1rem auto 0 auto;
    padding: 0.7rem 1.5rem;
    font-size: 1rem;
    background: #00aaff;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

form#rankForm button:hover {
    background: #0088cc;
}

/* 結果表示エリア */
#result {
    max-width: 400px;
    margin: 1.5rem auto;
    padding: 1rem 1.2rem;
    background: #e0f7fa;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: left;
}

/* 結果の各行 */
#result p {
    margin: 0.8rem 0;
    font-size: 1rem;
    color: #333;
}

/* 結果の数値部分 */
#result span {
    font-weight: bold;
    border-radius: 4px;
}

/* 必須入力記号 */
#requiredField {
    color: #ff0000;
}

/* 個別算出ボタン */
form#rankForm button.separateBtn {
    font-size: 0.9rem;
    padding: 0.2rem 0.6rem;
    background: #00ccff;
    box-shadow: 0 2px 4px rgba(0, 170, 255, 0.3);
}

/* ホバー時 */
form#rankForm button.separateBtn:hover {
    background: #0099cc;
    box-shadow: 0 3px 6px rgba(0, 136, 204, 0.4);
    transform: translateY(-1px);
}

/* ===== レスポンシブ対応 ===== */
@media (max-width: 600px) {
    header {
        height: 60px;
        padding: 0 1rem;
    }

    header h1 {
        font-size: 1.2rem;
    }

    .menu-toggle {
        width: 30px;
        height: 24px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        align-items: center;
        padding: 0;
    }

    .menu-toggle span {
        height: 3px;
        width: 100%;
        background: #fff;
        border-radius: 2px;
        display: block;
        margin: 4px 0;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    main h2 {
        font-size: 1.0rem;
    }

    .menu {
        display: none;
        flex-direction: column;
        background: #f8f9fa;
        position: absolute;
        top: 60px;
        right: 0;
        width: 200px;
        border: 1px solid #ccc;
        padding: 10px;
    }

    .menu.show {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    ul li a {
        font-size: 0.95rem;
        padding: 0.7rem 1rem;
    }

    form#rankForm {
        padding: 1rem;
    }

    form#rankForm label,
    form#rankForm input,
    form#rankForm p {
        font-size: 0.95rem;
    }

    form#rankForm button {
        font-size: 0.95rem;
        padding: 0.6rem 1.2rem;
    }

    #result {
        padding: 0.8rem 1rem;
        font-size: 0.95rem;
    }

    #result p {
        font-size: 0.95rem;
    }

    #result span {
        font-size: 0.95rem;
    }

    form#rankForm button.smallBtn {
        font-size: 0.7rem;
        padding: 0.25rem 0.6rem;
    }
}

@media (min-width: 900px) {
    main {
        text-align: left;
    }

    ul li {
        margin: 0.5rem 0;
    }
}