/**
 * File Upload Component Styles
 * ファイルアップロードコンポーネント スタイル
 *
 * Features:
 * - Drag & drop area
 * - Click to upload
 * - Image preview
 * - Format options
 * - Mobile responsive
 *
 * Version: 1.0
 */

/* ========================================
   1. File Upload Area
   ======================================== */
.file-upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: 8px;
    padding: 32px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--gray-50);
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background: var(--gray-100);
}

.file-upload-area.drag-over {
    border-color: var(--primary-color);
    background: var(--primary-light, #e3f2fd);
}

.upload-placeholder {
    color: var(--gray-600);
}

.upload-placeholder svg {
    margin: 0 auto 16px;
    color: var(--primary-color);
}

.upload-placeholder p {
    margin: 8px 0;
}

/* ========================================
   2. Format Options (Radio Buttons)
   ======================================== */
.format-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 8px;
}

.format-option {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px;
    border: 2px solid var(--gray-300);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: white;
    font-size: 14px;
}

.format-option:hover {
    border-color: var(--primary-color);
    background: var(--gray-50);
}

.format-option input[type="radio"] {
    margin: 0;
    cursor: pointer;
}

.format-option input[type="radio"]:checked + span,
.format-option:has(input:checked) {
    font-weight: 600;
    color: var(--primary-color);
}

.format-option:has(input:checked) {
    border-color: var(--primary-color);
    background: var(--primary-light, #e3f2fd);
}

/* ========================================
   3. Image Preview
   ======================================== */
#imagePreview,
#resultArea {
    margin-top: 16px;
}

#imagePreview img,
#resultImg {
    max-width: 100%;
    max-height: 300px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

#imageInfo,
#resultInfo {
    margin-top: 8px;
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* ========================================
   4. Responsive - Mobile (768px)
   ======================================== */
@media (max-width: 768px) {
    .file-upload-area {
        padding: 24px 16px;
    }

    .format-options-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 6px;
    }

    .format-option {
        padding: 8px 4px;
        font-size: 13px;
        flex-direction: column;
        gap: 4px;
    }

    #imagePreview img,
    #resultImg {
        max-height: 200px;
    }
}

/* ========================================
   5. Responsive - Small Mobile (480px)
   ======================================== */
@media (max-width: 480px) {
    .file-upload-area {
        padding: 20px 12px;
    }

    .format-options-grid {
        grid-template-columns: 1fr 1fr;
    }

    .format-option {
        padding: 6px 4px;
        font-size: 12px;
    }

    .upload-placeholder svg {
        width: 36px;
        height: 36px;
    }

    .upload-placeholder p {
        font-size: 0.875rem;
    }
}

/* ========================================
   6. Accessibility
   ======================================== */
.format-option:focus-within {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .format-option {
        border-width: 2px;
    }

    .file-upload-area {
        border-width: 3px;
    }
}

/* ========================================
   7. Print Styles
   ======================================== */
@media print {
    .file-upload-area,
    .format-option {
        border: 1px solid #000;
    }
}