/* 各セクションの共通ボックススタイル */
.section-box {
    margin-bottom: 30px;
    padding: 20px;
}

/* 実際のファイル入力はアクセス性を保ちつつ隠す */
#imageInput {
    border: 0;
    clip: rect(0, 0, 0, 0);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
}

/* ボタンの共通スタイル */
.section-box button {
    /* Styles for buttons within a section-box */
    display: block;
    padding: 0.5rem 2rem;
    border: 3px solid #000;
    border-radius: 0;
    background: #fff;
    color: #000;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    text-align: center;
    box-sizing: border-box; /* paddingとborderを含めて幅を計算 */
    margin: 0 auto;
}

.section-box button:hover {
    background: #000;
    color: #fff;
}
.section-box button:disabled {
    background-color: #e0e0e0;
    border-color: #ccc;
    color: #666;
    font-weight: 600;
    cursor: not-allowed;
}

/* 各セクションの初期表示設定 */
#processingSection, #downloadSection {
    display: none;
}

/* ローディングスピナー */
.loader {
    border: 5px solid #f3f3f3; /* Light grey */
    border-top: 5px solid #007bff; /* Blue */
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
    display: none; /* 初期状態では非表示 */
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Styles for fast_resizer.html */
/* The group containing a label and its inputs */
.input-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 320px; /* 操作しやすいように幅を確保 */
    margin: 0 auto;
}

/* A wrapper for the input elements to group them on the right */
.input-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-wrapper input[type="number"] {
    width: 65px;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    text-align: center;
    font-size: 16px;
}

.input-wrapper input[type="range"] {
    width: 120px;
}

#download-actions {
    margin-top: 25px;
    display: flex;
    justify-content: center;
}

#output {
    margin-top: 20px;
    width: 100%;
}

/* Styles for Fast Resizer Previews */
.preview-list {
    list-style: none;
    padding: 0;
    margin: 0;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
}

.preview-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: #fdfdfd;
    border-bottom: 1px solid #e0e0e0;
}

.preview-list-item:last-child {
    border-bottom: none;
}

.preview-list-item .file-info-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.preview-list-item .file-name {
    font-weight: 500;
    color: #333;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 15px;
    margin-bottom: 4px;
}

.preview-list-item .size-info {
    font-size: 0.9em;
    color: #666;
    white-space: nowrap;
    background-color: #f0f2f5;
    padding: 4px 8px;
    border-radius: 4px;
}

.download-individual-link {
    padding: 6px 12px;
    font-size: 0.9em;
    font-weight: 600;
    color: #007bff;
    background-color: transparent;
    border: 1px solid #007bff;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s, color 0.2s;
}
.download-individual-link:hover {
    background-color: #007bff;
    color: #fff;
}

/* --- Media Queries for Responsive Design --- */

@media (max-width: 767px) { /* Consolidated media query for mobile */
    body {
        padding: 15px;
    }

    header {
        margin-bottom: 20px;
    }

    .section-box {
        padding: 20px;
    }

    h1 {
        font-size: 1.8rem; /* スマホ表示に適したタイトルサイズ */
    }

    /* スマホではボタンを画面幅いっぱいに広げ、タップしやすくする */
    .section-box button {
        width: 100%;
    }

    .input-group {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }

    /* Fast Resizer Specifics */
    .preview-list-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .preview-list-item .file-name {
        white-space: normal; /* Allow file names to wrap */
    }

    .download-individual-link {
        align-self: flex-end; /* Move button to the right */
    }
}