@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700&display=swap');

:root {
    --primary-color: #0052cc;
    --primary-light: #e6f0ff;
    --secondary-color: #4CAF50;
    --error-color: #de350b;
    --background-color: #f4f5f7;
    --text-color: #172b4d;
    --text-light: #5e6c84;
    --border-color: #dfe1e6;
    --white: #ffffff;
    --box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

header {
    background-color: var(--white);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem; /* ナビゲーションとの間にスペース */
}

header h1 {
    color: var(--primary-color);
    margin: 0;
    font-size: 1.8rem;
}

.user-info {
    display: flex;
    align-items: center;
}

#username-display {
    margin-right: 1rem;
    font-weight: bold;
}

h1, h2, h3 {
    color: var(--text-color);
}

h2 {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

section {
    background: var(--white);
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
}

/* メインナビゲーション */
#main-nav {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    background: var(--white);
    padding: 1rem 2rem;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
}
#main-nav button {
    flex-grow: 1;
    background-color: var(--text-light);
    color: var(--white);
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: background-color 0.3s;
}
#main-nav button:hover {
    background-color: var(--text-color);
}
#main-nav button.active {
    background-color: var(--primary-color);
}
#main-nav button.active:hover {
    background-color: #003e99;
}


/* 月選択UI */
#month-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    background: var(--white);
    padding: 1rem 2rem;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
}
#current-month-select {
    flex-grow: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    -webkit-appearance: none; /* Safari/Chrome */
    -moz-appearance: none;    /* Firefox */
    appearance: none;         /* 標準の矢印を非表示 */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1.5em;
    padding-right: 2em; /* 矢印のスペース */
}

#add-payment-modal-btn {
    white-space: nowrap; /* ボタン内のテキストが改行されないように */
}

/* 年間サマリーコントロール */
.yearly-summary-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem 0;
}
#current-year-select {
    flex-grow: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1.5em;
    padding-right: 2em;
}


/* フォーム */
form {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}
form button[type="button"] { /* クリアボタン */
    background-color: var(--text-light);
}
form button[type="button"]:hover {
    background-color: var(--text-color);
}
form label {
    width: 100%; /* ラベルは常に1行 */
    margin-bottom: -0.5rem; /* 入力フィールドとの間隔調整 */
    font-weight: bold;
    font-size: 0.9rem;
}


#login-form-container, #register-form-container {
    max-width: 400px;
    margin: 2rem auto; /* 間隔を調整 */
    padding: 2rem;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--box-shadow);
}
#login-form, #register-form {
    flex-direction: column;
}


input[type="text"],
input[type="password"],
input[type="date"],
input[type="number"],
input[type="month"],
select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

button, input[type="submit"] {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #003e99;
}

#logout-button {
    background-color: var(--text-light);
}
#logout-button:hover {
    background-color: var(--text-color);
}

.error {
    color: var(--error-color);
    margin-top: 1rem;
    text-align: center;
}
.success {
    color: var(--secondary-color);
    margin-top: 1rem;
    text-align: center;
}

/* サマリー */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.summary-grid > div {
    background-color: var(--primary-light);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.summary-grid h3 {
    margin: 0.5rem 0 0;
    font-size: 2rem;
    color: var(--primary-color);
}

/* 管理者フォーム */
#admin-forms {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.form-container {
    background-color: #fafbfc;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.form-container h3 {
    margin-top: 0;
}

/* テーブル */
.table-responsive {
    overflow-x: auto; /* テーブルがはみ出た場合にスクロール可能にする */
    -webkit-overflow-scrolling: touch; /* iOSでのスムーズなスクロール */
}

#payments-table, #yearly-summary-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px; /* 小さい画面ではテーブルが縮みすぎないように */
}

#payments-table th, #payments-table td,
#yearly-summary-table th, #yearly-summary-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap; /* セル内のテキストが改行されないように */
}

#payments-table thead, #yearly-summary-table thead {
    background-color: #fafbfc;
}

#payments-table tbody tr:hover {
    background-color: var(--primary-light);
    cursor: pointer; /* 編集可能であることを示す */
}
#yearly-summary-table tbody tr:hover {
    background-color: var(--primary-light);
}


/* モーダル */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
    display: flex; /* Flexbox for centering */
    align-items: center; /* Center vertically */
    justify-content: center; /* Center horizontally */
}

.modal-content {
    background-color: #fefefe;
    margin: auto; /* Removed top/left margin, using flexbox instead */
    padding: 2rem;
    border: 1px solid #888;
    width: 90%; /* Could be more responsive */
    max-width: 500px; /* Max width */
    border-radius: 8px;
    position: relative;
    box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
}

.close-button {
    color: #aaaaaa;
    font-size: 28px;
    font-weight: bold;
    position: absolute;
    top: 10px;
    right: 20px;
    cursor: pointer;
}

.close-button:hover,
.close-button:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

.modal-content form {
    flex-direction: column;
}
.modal-content form input,
.modal-content form select,
.modal-content form button {
    margin-bottom: 1rem; /* フォーム要素間のスペース */
}


/* ユーティリティ */
.hidden {
    display: none !important;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
    }
    header h1 {
        margin-bottom: 0.5rem;
    }
    .user-info {
        margin-top: 0.5rem;
        width: 100%;
        justify-content: space-between;
    }
    #username-display {
        flex-grow: 1;
    }

    h1 {
        font-size: 1.5rem;
    }
    h2 {
        font-size: 1.3rem;
    }
    h3 {
        font-size: 1.1rem;
    }

    section {
        padding: 1rem;
    }

    .summary-grid {
        grid-template-columns: 1fr; /* 1列に積み重ねる */
    }

    #admin-forms {
        grid-template-columns: 1fr; /* 1列に積み重ねる */
    }

    #month-selector, .yearly-summary-controls {
        flex-direction: column;
        gap: 0.5rem;
        padding: 1rem;
    }
    #month-selector button,
    #month-selector select,
    #add-payment-modal-btn,
    .yearly-summary-controls button,
    .yearly-summary-controls select {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 0.9rem;
    }
    .container {
        padding: 0 0.5rem;
    }
    header {
        padding: 0.8rem 1rem;
    }
    header h1 {
        font-size: 1.4rem;
    }
    h2 {
        font-size: 1.2rem;
    }
    .summary-grid h3 {
        font-size: 1.5rem;
    }
    input[type="text"],
    input[type="password"],
    input[type="date"],
    input[type="number"],
    input[type="month"],
    select,
    button {
        padding: 0.7rem;
        font-size: 0.9rem;
    }
}